fix: use local path deps and update scheme API

Semver pre-release suffix (-rb0.2.5) breaks Cargo's [patch.crates-io]
matching for transitive deps. Build metadata (+rb0.2.5) is semver-
compatible: ^0.9.0 matches 0.9.0+rb0.2.5, patch redirection works,
and the Red Bear suffix is still visible in the version string.

.gitignore

@@ -1,2 +1 @@
-Cargo.lock
-target
+/target/

.gitlab-ci.yml

@@ -1,17 +0,0 @@
-image: "redoxos/redoxer"
-
-stages:
-    - build
-
-workflow:
-  rules:
-    - if: '$CI_COMMIT_BRANCH == "master" && $CI_PROJECT_NAMESPACE == "redox-os"'
-    - if: '$CI_MERGE_REQUEST_TARGET_BRANCH_NAME == "master"'
-
-build:linux:
-    stage: build
-    script: cargo +nightly build
-
-build:redox:
-    stage: build
-    script: redoxer build

.travis.yml

@@ -0,0 +1,6 @@
+language: rust
+rust:
+  - nightly
+sudo: false
+notifications:
+  email: false

Cargo.toml

@@ -1,25 +1,82 @@
 [package]
-name = "redox_syscall"
-version = "0.8.1"
-description = "A Rust library to access raw Redox system calls"
-license = "MIT"
-authors = ["Jeremy Soller <jackpot51@gmail.com>"]
-repository = "https://gitlab.redox-os.org/redox-os/syscall"
-documentation = "https://docs.rs/redox_syscall"
-edition = "2021"
+name = "userutils"
+version = "0.1.0+rb0.2.5"
+authors = ["Jeremy Soller <jackpot51@gmail.com>", "vasilito <adminpupkin@gmail.com>"]
+edition = "2024"
 
-[lib]
-name = "syscall"
+[[bin]]
+name = "id"
+path = "src/bin/id.rs"
 
-[features]
-default = ["userspace"]
-rustc-dep-of-std = ["core", "bitflags/rustc-dep-of-std"]
-userspace = []
-std = []
+[[bin]]
+name = "getty"
+path = "src/bin/getty.rs"
+
+[[bin]]
+name = "groupadd"
+path = "src/bin/groupadd.rs"
+
+[[bin]]
+name = "groupdel"
+path = "src/bin/groupdel.rs"
+
+[[bin]]
+name = "groupmod"
+path = "src/bin/groupmod.rs"
+
+[[bin]]
+name = "login"
+path = "src/bin/login.rs"
+
+[[bin]]
+name = "passwd"
+path = "src/bin/passwd.rs"
+
+[[bin]]
+name = "su"
+path = "src/bin/su.rs"
+
+[[bin]]
+name = "sudo"
+path = "src/bin/sudo.rs"
+
+[[bin]]
+name = "useradd"
+path = "src/bin/useradd.rs"
+
+[[bin]]
+name = "userdel"
+path = "src/bin/userdel.rs"
+
+[[bin]]
+name = "usermod"
+path = "src/bin/usermod.rs"
 
 [dependencies]
-bitflags = "2.4"
-core = { version = "1.0.0", optional = true, package = "rustc-std-workspace-core" }
+clap = "2.33.0"
+extra = { git = "https://gitlab.redox-os.org/redox-os/libextra.git" }
+orbclient = "0.3.47"
+plain = "0.2.3"
+redox_liner = "0.5.2"
+libredox = { path = "../libredox", features = ["mkns"] }
+redox_termios = "0.1.3"
+redox_event = "0.4.3"
+redox-scheme = { path = "../redox-scheme" }
+redox_syscall = { path = "../syscall" }
+redox_users = "0.4.6"
+termion = "4"
+libc = "0.2"
+serde = { version = "1.0.203", features = ["derive"] }
+toml = "0.8.11"
+ioslice = "0.6"
 
-[target.'cfg(loom)'.dev-dependencies]
-loom = "0.7"
+[target.'cfg(target_os = "redox")'.dependencies]
+redox-rt = { git = "https://gitlab.redox-os.org/redox-os/relibc", default-features = false }
+
+[patch.crates-io]
+redox_syscall = { path = "../syscall" }
+libredox = { path = "../libredox" }
+redox-scheme = { path = "../redox-scheme" }
+
+[profile.release]
+lto = true

LICENSE

@@ -1,22 +1,21 @@
-Copyright (c) 2017 Redox OS Developers
+The MIT License (MIT)
 
-MIT License
+Copyright (c) 2016 The Redox developers
 
-Permission is hereby granted, free of charge, to any person obtaining
-a copy of this software and associated documentation files (the
-"Software"), to deal in the Software without restriction, including
-without limitation the rights to use, copy, modify, merge, publish,
-distribute, sublicense, and/or sell copies of the Software, and to
-permit persons to whom the Software is furnished to do so, subject to
-the following conditions:
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
 
-The above copyright notice and this permission notice shall be
-included in all copies or substantial portions of the Software.
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
 
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
-LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -1,7 +1,24 @@
-# syscall
+# Redox OS user and group utilities.
 
-This crate contains the system call numbers and Rust wrappers for the inline Assembly code of system calls.
+The `userutils` crate contains the utilities for dealing with users and groups in Redox OS.
+They are heavily influenced by UNIX and are, when needed, tailored to specific Redox use cases.
 
-[![MIT licensed](https://img.shields.io/badge/license-MIT-blue.svg)](./LICENSE)
-[![crates.io](http://meritbadge.herokuapp.com/redox_syscall)](https://crates.io/crates/redox_syscall)
-[![docs.rs](https://docs.rs/redox_syscall/badge.svg)](https://docs.rs/redox_syscall)
+These implementations strive to be as simple as possible drawing particular
+inspiration by BSD systems. They are indeed small, by choice.
+
+[![Travis Build Status](https://travis-ci.org/redox-os/userutils.svg?branch=master)](https://travis-ci.org/redox-os/userutils)
+
+**Currently included:**
+
+- `getty`: Used by `init(8)` to open and initialize the TTY line, read a login name and invoke `login(1)`.
+- `id`: Displays user identity.
+- `login`: Allows users to login into the system
+- `passwd`: Allows users to modify their passwords.
+- `su`: Allows users to substitute identity.
+- `sudo`: Enables users to execute a command as another user.
+- `useradd`: Add a user
+- `usermod`: Modify user information
+- `userdel`: Delete a user
+- `groupadd`: Add a user group
+- `groupmod`: Modify group information
+- `groupdel`: Remove a user group

res/issue

@@ -0,0 +1,6 @@
+########## Red Bear OS #########
+# Login with the following:    #
+# `user`                       #
+# `root`:`password`            #
+################################
+ 

res/issue.orig

@@ -0,0 +1,6 @@
+########## Redox OS ##########
+# Login with the following:  #
+# `user`                     #
+# `root`:`password`          #
+##############################
+ 

res/motd

@@ -0,0 +1,2 @@
+Welcome to Red Bear OS!
+ 

src/arch/aarch64.rs

@@ -1,207 +0,0 @@
-use core::{
-    mem,
-    ops::{Deref, DerefMut},
-    slice,
-};
-
-use super::error::{Error, Result};
-
-pub const PAGE_SIZE: usize = 4096;
-/// Size of the metadata region used to transfer information from the kernel to the bootstrapper.
-pub const KERNEL_METADATA_SIZE: usize = 4 * PAGE_SIZE;
-
-#[cfg(feature = "userspace")]
-macro_rules! syscall {
-    ($($name:ident($a:ident, $($b:ident, $($c:ident, $($d:ident, $($e:ident, $($f:ident, $($g:ident, )?)?)?)?)?)?);)+) => {
-        $(
-            pub unsafe fn $name($a: usize, $($b: usize, $($c: usize, $($d: usize, $($e: usize, $($f: usize, $($g: usize)?)?)?)?)?)?) -> Result<usize> {
-                let ret: usize;
-
-                core::arch::asm!(
-                    "svc 0",
-                    in("x8") $a,
-                    $(
-                        in("x0") $b,
-                        $(
-                            in("x1") $c,
-                            $(
-                                in("x2") $d,
-                                $(
-                                    in("x3") $e,
-                                    $(
-                                        in("x4") $f,
-                                        $(
-                                            in("x5") $g,
-                                        )?
-                                    )?
-                                )?
-                            )?
-                        )?
-                    )?
-                    lateout("x0") ret,
-                    options(nostack),
-                );
-
-                Error::demux(ret)
-            }
-        )+
-    };
-}
-
-#[cfg(feature = "userspace")]
-syscall! {
-    syscall0(a,);
-    syscall1(a, b,);
-    syscall2(a, b, c,);
-    syscall3(a, b, c, d,);
-    syscall4(a, b, c, d, e,);
-    syscall5(a, b, c, d, e, f,);
-    syscall6(a, b, c, d, e, f, g,);
-}
-
-#[derive(Copy, Clone, Debug, Default)]
-#[repr(C)]
-pub struct IntRegisters {
-    pub x30: usize,
-    pub x29: usize,
-    pub x28: usize,
-    pub x27: usize,
-    pub x26: usize,
-    pub x25: usize,
-    pub x24: usize,
-    pub x23: usize,
-    pub x22: usize,
-    pub x21: usize,
-    pub x20: usize,
-    pub x19: usize,
-    pub x18: usize,
-    pub x17: usize,
-    pub x16: usize,
-    pub x15: usize,
-    pub x14: usize,
-    pub x13: usize,
-    pub x12: usize,
-    pub x11: usize,
-    pub x10: usize,
-    pub x9: usize,
-    pub x8: usize,
-    pub x7: usize,
-    pub x6: usize,
-    pub x5: usize,
-    pub x4: usize,
-    pub x3: usize,
-    pub x2: usize,
-    pub x1: usize,
-    pub x0: usize,
-}
-
-impl Deref for IntRegisters {
-    type Target = [u8];
-    fn deref(&self) -> &[u8] {
-        unsafe {
-            slice::from_raw_parts(
-                self as *const IntRegisters as *const u8,
-                mem::size_of::<IntRegisters>(),
-            )
-        }
-    }
-}
-
-impl DerefMut for IntRegisters {
-    fn deref_mut(&mut self) -> &mut [u8] {
-        unsafe {
-            slice::from_raw_parts_mut(
-                self as *mut IntRegisters as *mut u8,
-                mem::size_of::<IntRegisters>(),
-            )
-        }
-    }
-}
-
-#[derive(Clone, Copy, Debug, Default)]
-#[repr(C, packed)]
-pub struct FloatRegisters {
-    pub fp_simd_regs: [u128; 32],
-    pub fpsr: u32,
-    pub fpcr: u32,
-}
-
-impl Deref for FloatRegisters {
-    type Target = [u8];
-    fn deref(&self) -> &[u8] {
-        unsafe {
-            slice::from_raw_parts(
-                self as *const FloatRegisters as *const u8,
-                mem::size_of::<FloatRegisters>(),
-            )
-        }
-    }
-}
-
-impl DerefMut for FloatRegisters {
-    fn deref_mut(&mut self) -> &mut [u8] {
-        unsafe {
-            slice::from_raw_parts_mut(
-                self as *mut FloatRegisters as *mut u8,
-                mem::size_of::<FloatRegisters>(),
-            )
-        }
-    }
-}
-
-#[derive(Clone, Copy, Debug, Default)]
-#[repr(C, packed)]
-pub struct EnvRegisters {
-    pub tpidr_el0: usize,
-    pub tpidrro_el0: usize,
-}
-impl Deref for EnvRegisters {
-    type Target = [u8];
-    fn deref(&self) -> &[u8] {
-        unsafe {
-            slice::from_raw_parts(
-                self as *const EnvRegisters as *const u8,
-                mem::size_of::<EnvRegisters>(),
-            )
-        }
-    }
-}
-
-impl DerefMut for EnvRegisters {
-    fn deref_mut(&mut self) -> &mut [u8] {
-        unsafe {
-            slice::from_raw_parts_mut(
-                self as *mut EnvRegisters as *mut u8,
-                mem::size_of::<EnvRegisters>(),
-            )
-        }
-    }
-}
-#[derive(Clone, Copy, Debug, Default)]
-#[repr(C, packed)]
-pub struct Exception {
-    pub kind: usize,
-    // TODO
-}
-impl Deref for Exception {
-    type Target = [u8];
-    fn deref(&self) -> &[u8] {
-        unsafe {
-            slice::from_raw_parts(
-                self as *const Exception as *const u8,
-                mem::size_of::<Exception>(),
-            )
-        }
-    }
-}
-
-impl DerefMut for Exception {
-    fn deref_mut(&mut self) -> &mut [u8] {
-        unsafe {
-            slice::from_raw_parts_mut(
-                self as *mut Exception as *mut u8,
-                mem::size_of::<Exception>(),
-            )
-        }
-    }
-}

src/arch/riscv64.rs

@@ -1,206 +0,0 @@
-use super::error::{Error, Result};
-use core::arch::asm;
-use core::{
-    mem,
-    ops::{Deref, DerefMut},
-    slice,
-};
-
-pub const PAGE_SIZE: usize = 4096;
-/// Size of the metadata region used to transfer information from the kernel to the bootstrapper.
-pub const KERNEL_METADATA_SIZE: usize = 4 * PAGE_SIZE;
-
-#[cfg(feature = "userspace")]
-macro_rules! syscall {
-    ($($name:ident($a:ident, $($b:ident, $($c:ident, $($d:ident, $($e:ident, $($f:ident, $($g:ident, )?)?)?)?)?)?);)+) => {
-        $(
-            pub unsafe fn $name($a: usize, $($b: usize, $($c: usize, $($d: usize, $($e: usize, $($f: usize, $($g: usize)?)?)?)?)?)?) -> Result<usize> {
-                let ret: usize;
-
-                asm!(
-                    "ecall",
-                    in("a7") $a,
-                    $(
-                        in("a0") $b,
-                        $(
-                            in("a1") $c,
-                            $(
-                                in("a2") $d,
-                                $(
-                                    in("a3") $e,
-                                    $(
-                                        in("a4") $f,
-                                        $(
-                                            in("a5") $g,
-                                        )?
-                                    )?
-                                )?
-                            )?
-                        )?
-                    )?
-                    lateout("a0") ret,
-                    options(nostack),
-                );
-
-                Error::demux(ret)
-            }
-        )+
-    };
-}
-
-#[cfg(feature = "userspace")]
-syscall! {
-    syscall0(a,);
-    syscall1(a, b,);
-    syscall2(a, b, c,);
-    syscall3(a, b, c, d,);
-    syscall4(a, b, c, d, e,);
-    syscall5(a, b, c, d, e, f,);
-    syscall6(a, b, c, d, e, f, g,);
-}
-
-#[derive(Copy, Clone, Debug, Default)]
-#[repr(C)]
-pub struct IntRegisters {
-    pub pc: usize,
-    pub x31: usize,
-    pub x30: usize,
-    pub x29: usize,
-    pub x28: usize,
-    pub x27: usize,
-    pub x26: usize,
-    pub x25: usize,
-    pub x24: usize,
-    pub x23: usize,
-    pub x22: usize,
-    pub x21: usize,
-    pub x20: usize,
-    pub x19: usize,
-    pub x18: usize,
-    pub x17: usize,
-    pub x16: usize,
-    pub x15: usize,
-    pub x14: usize,
-    pub x13: usize,
-    pub x12: usize,
-    pub x11: usize,
-    pub x10: usize,
-    pub x9: usize,
-    pub x8: usize,
-    pub x7: usize,
-    pub x6: usize,
-    pub x5: usize,
-    // x4(tp) is in env
-    // x3(gp) is a platform scratch register
-    pub x2: usize,
-    pub x1: usize,
-}
-
-impl Deref for IntRegisters {
-    type Target = [u8];
-    fn deref(&self) -> &[u8] {
-        unsafe {
-            slice::from_raw_parts(
-                self as *const IntRegisters as *const u8,
-                mem::size_of::<IntRegisters>(),
-            )
-        }
-    }
-}
-
-impl DerefMut for IntRegisters {
-    fn deref_mut(&mut self) -> &mut [u8] {
-        unsafe {
-            slice::from_raw_parts_mut(
-                self as *mut IntRegisters as *mut u8,
-                mem::size_of::<IntRegisters>(),
-            )
-        }
-    }
-}
-
-#[derive(Clone, Copy, Debug, Default)]
-#[repr(C, packed)]
-pub struct FloatRegisters {
-    pub fregs: [u64; 32],
-    pub fcsr: u32,
-}
-
-impl Deref for FloatRegisters {
-    type Target = [u8];
-    fn deref(&self) -> &[u8] {
-        unsafe {
-            slice::from_raw_parts(
-                self as *const FloatRegisters as *const u8,
-                mem::size_of::<FloatRegisters>(),
-            )
-        }
-    }
-}
-
-impl DerefMut for FloatRegisters {
-    fn deref_mut(&mut self) -> &mut [u8] {
-        unsafe {
-            slice::from_raw_parts_mut(
-                self as *mut FloatRegisters as *mut u8,
-                mem::size_of::<FloatRegisters>(),
-            )
-        }
-    }
-}
-
-#[derive(Clone, Copy, Debug, Default)]
-#[repr(packed)]
-pub struct EnvRegisters {
-    pub tp: usize,
-}
-impl Deref for EnvRegisters {
-    type Target = [u8];
-    fn deref(&self) -> &[u8] {
-        unsafe {
-            slice::from_raw_parts(
-                self as *const EnvRegisters as *const u8,
-                mem::size_of::<EnvRegisters>(),
-            )
-        }
-    }
-}
-
-impl DerefMut for EnvRegisters {
-    fn deref_mut(&mut self) -> &mut [u8] {
-        unsafe {
-            slice::from_raw_parts_mut(
-                self as *mut EnvRegisters as *mut u8,
-                mem::size_of::<EnvRegisters>(),
-            )
-        }
-    }
-}
-#[derive(Clone, Copy, Debug, Default)]
-#[repr(C, packed)]
-pub struct Exception {
-    pub kind: usize,
-    // TODO
-}
-impl Deref for Exception {
-    type Target = [u8];
-    fn deref(&self) -> &[u8] {
-        unsafe {
-            slice::from_raw_parts(
-                self as *const Exception as *const u8,
-                mem::size_of::<Exception>(),
-            )
-        }
-    }
-}
-
-impl DerefMut for Exception {
-    fn deref_mut(&mut self) -> &mut [u8] {
-        unsafe {
-            slice::from_raw_parts_mut(
-                self as *mut Exception as *mut u8,
-                mem::size_of::<Exception>(),
-            )
-        }
-    }
-}

src/arch/x86.rs

@@ -1,288 +0,0 @@
-use core::{
-    arch::asm,
-    mem,
-    ops::{Deref, DerefMut},
-    slice,
-};
-
-use super::error::{Error, Result};
-
-pub const PAGE_SIZE: usize = 4096;
-/// Size of the metadata region used to transfer information from the kernel to the bootstrapper.
-pub const KERNEL_METADATA_SIZE: usize = 4 * PAGE_SIZE;
-
-#[cfg(feature = "userspace")]
-macro_rules! syscall {
-    ($($name:ident($a:ident, $($b:ident, $($c:ident, $($d:ident, $($e:ident, $($f:ident, )?)?)?)?)?);)+) => {
-        $(
-            pub unsafe fn $name(mut $a: usize, $($b: usize, $($c: usize, $($d: usize, $($e: usize, $($f: usize)?)?)?)?)?) -> Result<usize> {
-                asm!(
-                    "int 0x80",
-                    inout("eax") $a,
-                    $(
-                        in("ebx") $b,
-                        $(
-                            in("ecx") $c,
-                            $(
-                                in("edx") $d,
-                                $(
-                                    in("esi") $e,
-                                    $(
-                                        in("edi") $f,
-                                    )?
-                                )?
-                            )?
-                        )?
-                    )?
-                    options(nostack),
-                );
-
-                Error::demux($a)
-            }
-        )+
-    };
-}
-
-#[cfg(feature = "userspace")]
-syscall! {
-    syscall0(a,);
-    syscall1(a, b,);
-    syscall2(a, b, c,);
-    syscall3(a, b, c, d,);
-    // Must be done custom because LLVM reserves ESI
-    //syscall4(a, b, c, d, e,);
-    //syscall5(a, b, c, d, e, f,);
-    //syscall6(a, b, c, d, e, f, g,);
-}
-
-#[cfg(feature = "userspace")]
-pub unsafe fn syscall4(mut a: usize, b: usize, c: usize, d: usize, e: usize) -> Result<usize> {
-    asm!(
-        "xchg esi, {e}
-        int 0x80
-        xchg esi, {e}",
-        e = in(reg) e,
-        inout("eax") a,
-        in("ebx") b,
-        in("ecx") c,
-        in("edx") d,
-        options(nostack),
-    );
-
-    Error::demux(a)
-}
-
-#[cfg(feature = "userspace")]
-pub unsafe fn syscall5(
-    mut a: usize,
-    b: usize,
-    c: usize,
-    d: usize,
-    e: usize,
-    f: usize,
-) -> Result<usize> {
-    asm!(
-        "xchg esi, {e}
-        int 0x80
-        xchg esi, {e}",
-        e = in(reg) e,
-        inout("eax") a,
-        in("ebx") b,
-        in("ecx") c,
-        in("edx") d,
-        in("edi") f,
-        options(nostack),
-    );
-
-    Error::demux(a)
-}
-
-#[cfg(feature = "userspace")]
-pub unsafe fn syscall6(
-    mut a: usize,
-    b: usize,
-    c: usize,
-    d: usize,
-    e: usize,
-    f: usize,
-    g: usize,
-) -> Result<usize> {
-    #[repr(C)]
-    struct PackedArgs {
-        arg4: usize,
-        arg6: usize,
-        nr: usize,
-    }
-    let args = PackedArgs {
-        arg4: e,
-        arg6: g,
-        nr: a,
-    };
-    let args_ptr = &args as *const PackedArgs;
-    asm!(
-        "push ebp",
-        "push esi",
-        "mov esi, [eax + 0]", // arg4 -> esi
-        "mov ebp, [eax + 4]", // arg6 -> ebp
-        "mov eax, [eax + 8]", // nr -> eax
-        "int 0x80",
-        "pop esi",
-        "pop ebp",
-        inout("eax") args_ptr => a,
-        in("ebx") b,
-        in("ecx") c,
-        in("edx") d,
-        in("edi") f,
-        options(nostack),
-    );
-
-    Error::demux(a)
-}
-
-#[derive(Copy, Clone, Debug, Default)]
-#[repr(C)]
-pub struct IntRegisters {
-    // TODO: Some of these don't get set by Redox yet. Should they?
-    pub ebp: usize,
-    pub esi: usize,
-    pub edi: usize,
-    pub ebx: usize,
-    pub eax: usize,
-    pub ecx: usize,
-    pub edx: usize,
-    // pub orig_rax: usize,
-    pub eip: usize,
-    pub cs: usize,
-    pub eflags: usize,
-    pub esp: usize,
-    pub ss: usize,
-    // pub fs_base: usize,
-    // pub gs_base: usize,
-    // pub ds: usize,
-    // pub es: usize,
-    pub fs: usize,
-    // pub gs: usize
-}
-
-impl Deref for IntRegisters {
-    type Target = [u8];
-    fn deref(&self) -> &[u8] {
-        unsafe {
-            slice::from_raw_parts(
-                self as *const IntRegisters as *const u8,
-                mem::size_of::<IntRegisters>(),
-            )
-        }
-    }
-}
-
-impl DerefMut for IntRegisters {
-    fn deref_mut(&mut self) -> &mut [u8] {
-        unsafe {
-            slice::from_raw_parts_mut(
-                self as *mut IntRegisters as *mut u8,
-                mem::size_of::<IntRegisters>(),
-            )
-        }
-    }
-}
-
-#[derive(Clone, Copy, Debug, Default)]
-#[repr(C, packed)]
-pub struct FloatRegisters {
-    pub fcw: u16,
-    pub fsw: u16,
-    pub ftw: u8,
-    pub _reserved: u8,
-    pub fop: u16,
-    pub fip: u64,
-    pub fdp: u64,
-    pub mxcsr: u32,
-    pub mxcsr_mask: u32,
-    pub st_space: [u128; 8],
-    pub xmm_space: [u128; 16],
-    // TODO: YMM/ZMM
-}
-
-impl Deref for FloatRegisters {
-    type Target = [u8];
-    fn deref(&self) -> &[u8] {
-        unsafe {
-            slice::from_raw_parts(
-                self as *const FloatRegisters as *const u8,
-                mem::size_of::<FloatRegisters>(),
-            )
-        }
-    }
-}
-
-impl DerefMut for FloatRegisters {
-    fn deref_mut(&mut self) -> &mut [u8] {
-        unsafe {
-            slice::from_raw_parts_mut(
-                self as *mut FloatRegisters as *mut u8,
-                mem::size_of::<FloatRegisters>(),
-            )
-        }
-    }
-}
-
-#[derive(Clone, Copy, Debug, Default)]
-#[repr(C, packed)]
-pub struct EnvRegisters {
-    pub fsbase: u32,
-    pub gsbase: u32,
-}
-
-impl Deref for EnvRegisters {
-    type Target = [u8];
-    fn deref(&self) -> &[u8] {
-        unsafe {
-            slice::from_raw_parts(
-                self as *const EnvRegisters as *const u8,
-                mem::size_of::<EnvRegisters>(),
-            )
-        }
-    }
-}
-
-impl DerefMut for EnvRegisters {
-    fn deref_mut(&mut self) -> &mut [u8] {
-        unsafe {
-            slice::from_raw_parts_mut(
-                self as *mut EnvRegisters as *mut u8,
-                mem::size_of::<EnvRegisters>(),
-            )
-        }
-    }
-}
-
-#[derive(Clone, Copy, Debug, Default)]
-#[repr(C, packed)]
-pub struct Exception {
-    pub kind: usize,
-    pub code: usize,
-    pub address: usize,
-}
-impl Deref for Exception {
-    type Target = [u8];
-    fn deref(&self) -> &[u8] {
-        unsafe {
-            slice::from_raw_parts(
-                self as *const Exception as *const u8,
-                mem::size_of::<Exception>(),
-            )
-        }
-    }
-}
-
-impl DerefMut for Exception {
-    fn deref_mut(&mut self) -> &mut [u8] {
-        unsafe {
-            slice::from_raw_parts_mut(
-                self as *mut Exception as *mut u8,
-                mem::size_of::<Exception>(),
-            )
-        }
-    }
-}

src/arch/x86_64.rs

@@ -1,194 +0,0 @@
-use core::{
-    mem,
-    ops::{Deref, DerefMut},
-    slice,
-};
-
-pub const PAGE_SIZE: usize = 4096;
-/// Size of the metadata region used to transfer information from the kernel to the bootstrapper.
-pub const KERNEL_METADATA_SIZE: usize = 4 * PAGE_SIZE;
-
-#[cfg(feature = "userspace")]
-macro_rules! syscall {
-    ($($name:ident($a:ident, $($b:ident, $($c:ident, $($d:ident, $($e:ident, $($f:ident, $($g:ident, )?)?)?)?)?)?);)+) => {
-        $(
-            pub unsafe fn $name(mut $a: usize, $($b: usize, $($c: usize, $($d: usize, $($e: usize, $($f: usize, $($g: usize)?)?)?)?)?)?) -> crate::error::Result<usize> {
-                core::arch::asm!(
-                    "syscall",
-                    inout("rax") $a,
-                    $(
-                        in("rdi") $b,
-                        $(
-                            in("rsi") $c,
-                            $(
-                                in("rdx") $d,
-                                $(
-                                    in("r10") $e,
-                                    $(
-                                        in("r8") $f,
-                                        $(
-                                            in("r9") $g,
-                                        )?
-                                    )?
-                                )?
-                            )?
-                        )?
-                    )?
-                    out("rcx") _,
-                    out("r11") _,
-                    options(nostack),
-                );
-
-                crate::error::Error::demux($a)
-            }
-        )+
-    };
-}
-
-#[cfg(feature = "userspace")]
-syscall! {
-    syscall0(a,);
-    syscall1(a, b,);
-    syscall2(a, b, c,);
-    syscall3(a, b, c, d,);
-    syscall4(a, b, c, d, e,);
-    syscall5(a, b, c, d, e, f,);
-    syscall6(a, b, c, d, e, f, g,);
-}
-
-#[derive(Copy, Clone, Debug, Default)]
-#[repr(C)]
-pub struct IntRegisters {
-    pub r15: usize,
-    pub r14: usize,
-    pub r13: usize,
-    pub r12: usize,
-    pub rbp: usize,
-    pub rbx: usize,
-    pub r11: usize,
-    pub r10: usize,
-    pub r9: usize,
-    pub r8: usize,
-    pub rax: usize,
-    pub rcx: usize,
-    pub rdx: usize,
-    pub rsi: usize,
-    pub rdi: usize,
-    pub rip: usize,
-    pub cs: usize,
-    pub rflags: usize,
-    pub rsp: usize,
-    pub ss: usize,
-}
-
-impl Deref for IntRegisters {
-    type Target = [u8];
-    fn deref(&self) -> &[u8] {
-        unsafe { slice::from_raw_parts(self as *const Self as *const u8, mem::size_of::<Self>()) }
-    }
-}
-
-impl DerefMut for IntRegisters {
-    fn deref_mut(&mut self) -> &mut [u8] {
-        unsafe { slice::from_raw_parts_mut(self as *mut Self as *mut u8, mem::size_of::<Self>()) }
-    }
-}
-
-#[derive(Clone, Copy, Debug, Default)]
-#[repr(C, packed)]
-pub struct FloatRegisters {
-    pub fcw: u16,
-    pub fsw: u16,
-    pub ftw: u8,
-    pub _reserved: u8,
-    pub fop: u16,
-    pub fip: u64,
-    pub fdp: u64,
-    pub mxcsr: u32,
-    pub mxcsr_mask: u32,
-    pub st_space: [u128; 8],
-    pub xmm_space: [u128; 16],
-    // TODO: YMM/ZMM
-}
-
-impl Deref for FloatRegisters {
-    type Target = [u8];
-    fn deref(&self) -> &[u8] {
-        unsafe {
-            slice::from_raw_parts(
-                self as *const FloatRegisters as *const u8,
-                mem::size_of::<FloatRegisters>(),
-            )
-        }
-    }
-}
-
-impl DerefMut for FloatRegisters {
-    fn deref_mut(&mut self) -> &mut [u8] {
-        unsafe {
-            slice::from_raw_parts_mut(
-                self as *mut FloatRegisters as *mut u8,
-                mem::size_of::<FloatRegisters>(),
-            )
-        }
-    }
-}
-#[derive(Clone, Copy, Debug, Default)]
-#[repr(C, packed)]
-pub struct EnvRegisters {
-    pub fsbase: u64,
-    pub gsbase: u64,
-    // TODO: PKRU?
-}
-impl Deref for EnvRegisters {
-    type Target = [u8];
-    fn deref(&self) -> &[u8] {
-        unsafe {
-            slice::from_raw_parts(
-                self as *const EnvRegisters as *const u8,
-                mem::size_of::<EnvRegisters>(),
-            )
-        }
-    }
-}
-
-impl DerefMut for EnvRegisters {
-    fn deref_mut(&mut self) -> &mut [u8] {
-        unsafe {
-            slice::from_raw_parts_mut(
-                self as *mut EnvRegisters as *mut u8,
-                mem::size_of::<EnvRegisters>(),
-            )
-        }
-    }
-}
-
-#[derive(Clone, Copy, Debug, Default)]
-#[repr(C, packed)]
-pub struct Exception {
-    pub kind: usize,
-    pub code: usize,
-    pub address: usize,
-}
-impl Deref for Exception {
-    type Target = [u8];
-    fn deref(&self) -> &[u8] {
-        unsafe {
-            slice::from_raw_parts(
-                self as *const Exception as *const u8,
-                mem::size_of::<Exception>(),
-            )
-        }
-    }
-}
-
-impl DerefMut for Exception {
-    fn deref_mut(&mut self) -> &mut [u8] {
-        unsafe {
-            slice::from_raw_parts_mut(
-                self as *mut Exception as *mut u8,
-                mem::size_of::<Exception>(),
-            )
-        }
-    }
-}

src/bin/getty.rs

@@ -0,0 +1,285 @@
+#[macro_use]
+extern crate clap;
+
+use std::error::Error;
+use std::fs::File;
+use std::io::{self, ErrorKind, Read, Stderr, Write};
+use std::os::unix::io::{AsRawFd, FromRawFd, RawFd};
+use std::process::{Child, Command, Stdio};
+use std::str;
+use std::time::{Duration, Instant};
+
+use event::{EventFlags, RawEventQueue};
+use extra::io::fail;
+use libredox::call as redox;
+use libredox::errno::EAGAIN;
+use libredox::flag;
+
+const _MAN_PAGE: &'static str = /* @MANSTART{getty} */
+    r#"
+NAME
+    getty - set terminal mode
+
+SYNOPSIS
+    getty [-J | --noclear | -C | --contain ] tty
+    getty [ -h | --help ]
+
+DESCRIPTION
+    The getty utility is called by init(8) to open and initialize the tty line,
+    read a login name, and invoke login(1).
+
+OPTIONS
+
+    -h, --help
+        Display this help and exit.
+
+    -J, --noclear
+        Do not clear the screen before forking login(1).
+
+    -C, --contain
+        Run contain_login instead of login
+
+AUTHOR
+    Written by Jeremy Soller.
+"#; /* @MANEND */
+
+const DEFAULT_COLS: u16 = 80;
+const DEFAULT_LINES: u16 = 30;
+
+pub fn handle(
+    event_queue: &mut RawEventQueue,
+    tty_fd: RawFd,
+    master_fd: RawFd,
+    process: &mut Child,
+) {
+    // tty_fd => Display
+    // master_fd => PTY
+
+    let handle_event = |event_id: usize| {
+        if event_id as RawFd == tty_fd {
+            let mut packet = [0; 4096];
+            loop {
+                let count = match redox::read(tty_fd as usize, &mut packet) {
+                    Ok(0) => return,
+                    Ok(count) => count,
+                    Err(ref err) if err.errno() == EAGAIN => break,
+                    Err(_) => panic!("getty: failed to read from TTY"),
+                };
+                redox::write(master_fd as usize, &packet[..count])
+                    .expect("getty: failed to write master PTY");
+            }
+        } else if event_id as RawFd == master_fd {
+            let mut packet = [0; 4096];
+            loop {
+                let count = match redox::read(master_fd as usize, &mut packet) {
+                    Ok(0) => return,
+                    Ok(count) => count,
+                    Err(ref err) if err.errno() == EAGAIN => break,
+                    Err(_) => panic!("getty: failed to read from master TTY"),
+                };
+                redox::write(tty_fd as usize, &packet[1..count])
+                    .expect("getty: failed to write to TTY");
+                if packet[0] & 1 == 1 {
+                    let _ = redox::fsync(tty_fd as usize);
+                }
+            }
+        }
+    };
+
+    handle_event(tty_fd as usize);
+    handle_event(master_fd as usize);
+
+    'events: loop {
+        let sys_event = event_queue
+            .next()
+            .expect("getty: event queue stopped")
+            .expect("getty: failed to read event file");
+        handle_event(sys_event.fd);
+
+        match process.try_wait() {
+            Ok(status) => match status {
+                Some(_code) => break 'events,
+                None => (),
+            },
+            Err(err) => match err.kind() {
+                ErrorKind::WouldBlock => (),
+                _ => panic!("getty: failed to wait on child: {:?}", err),
+            },
+        }
+    }
+
+    let _ = process.kill();
+    process.wait().expect("getty: failed to wait on login");
+}
+
+pub fn getpty(columns: u16, lines: u16) -> (RawFd, String) {
+    let master = redox::open(
+        "/scheme/pty",
+        flag::O_CLOEXEC | flag::O_RDWR | flag::O_CREAT | flag::O_NONBLOCK,
+        0,
+    )
+    .expect("getty: failed to create PTY");
+
+    if let Ok(winsize_fd) = redox::dup(master, b"winsize") {
+        let _ = redox::write(
+            winsize_fd,
+            &redox_termios::Winsize {
+                ws_row: lines,
+                ws_col: columns,
+            },
+        );
+        let _ = redox::close(winsize_fd);
+    }
+
+    let mut buf: [u8; 4096] = [0; 4096];
+    let count = redox::fpath(master, &mut buf).unwrap();
+    (master as RawFd, unsafe {
+        String::from_utf8_unchecked(Vec::from(&buf[..count]))
+    })
+}
+
+// termion cursor_pos prone to error and does not work on nonblocking files
+fn tty_cursor_pos(tty: &mut File) -> Result<(u16, u16), Box<dyn Error>> {
+    write!(tty, "\x1B[6n")?;
+    tty.flush()?;
+
+    let timeout = Duration::from_millis(500);
+    let instant = Instant::now();
+    let mut data = String::new();
+    while instant.elapsed() < timeout {
+        let mut bytes = [0];
+        match tty.read(&mut bytes) {
+            Ok(count) => if count == 1 {
+                let c = bytes[0] as char;
+                if c == 'R' {
+                    break;
+                }
+                data.push(c);
+            },
+            Err(err) => if err.kind() != ErrorKind::WouldBlock {
+                return Err(err.into());
+            }
+        }
+    }
+
+    if data.is_empty() {
+        return Err("cursor position timed out".into());
+    }
+
+    let beg = data.rfind('[').ok_or("failed to find [")?;
+    let coords: String = data.chars().skip(beg + 1).collect();
+    let mut nums = coords.split(';');
+
+    let row = nums.next().ok_or("failed to find row")?.parse::<u16>()?;
+    let col = nums.next().ok_or("failed to find col")?.parse::<u16>()?;
+
+    Ok((col, row))
+}
+
+fn tty_columns_lines(tty: &mut File) -> Result<(u16, u16), Box<dyn Error>> {
+    write!(tty, "{}", termion::cursor::Save)?;
+    tty.flush()?;
+
+    write!(tty, "{}", termion::cursor::Goto(999, 999))?;
+    tty.flush()?;
+
+    let res = tty_cursor_pos(tty);
+
+    write!(tty, "{}", termion::cursor::Restore)?;
+    tty.flush()?;
+
+    res
+}
+
+fn daemon(tty: &mut File, clear: bool, contain: bool, stderr: &mut Stderr) {
+    let (columns, lines) = tty_columns_lines(tty).unwrap_or((DEFAULT_COLS, DEFAULT_LINES));
+    let tty_fd = tty.as_raw_fd();
+
+    let (master_fd, pty) = getpty(columns, lines);
+
+    let mut event_queue = event::RawEventQueue::new().expect("getty: failed to open event queue");
+
+    event_queue
+        .subscribe(tty_fd as usize, 0, EventFlags::READ)
+        .expect("getty: failed to fevent TTY");
+
+    event_queue
+        .subscribe(master_fd as usize, 0, EventFlags::READ)
+        .expect("getty: failed to fevent master PTY");
+
+    loop {
+        if clear {
+            let _ = redox::write(tty_fd as usize, b"\x1Bc");
+        }
+        let _ = redox::fsync(tty_fd as usize);
+
+        let slave_stdin = redox::open(&pty, flag::O_CLOEXEC | flag::O_RDONLY, 0)
+            .expect("getty: failed to open slave stdin");
+        let slave_stdout = redox::open(&pty, flag::O_CLOEXEC | flag::O_WRONLY, 0)
+            .expect("getty: failed to open slave stdout");
+        let slave_stderr = redox::open(&pty, flag::O_CLOEXEC | flag::O_WRONLY, 0)
+            .expect("getty: failed to open slave stderr");
+
+        let mut command = if contain {
+            Command::new("contain_login")
+        } else {
+            Command::new("login")
+        };
+        unsafe {
+            command
+                .stdin(Stdio::from_raw_fd(slave_stdin as RawFd))
+                .stdout(Stdio::from_raw_fd(slave_stdout as RawFd))
+                .stderr(Stdio::from_raw_fd(slave_stderr as RawFd))
+                .env("TERM", "xterm-256color")
+                .env("TTY", &pty);
+        }
+
+        match command.spawn() {
+            Ok(mut process) => {
+                handle(&mut event_queue, tty_fd, master_fd, &mut process);
+            }
+            Err(err) => fail(&format!("getty: failed to execute login: {}", err), stderr),
+        }
+    }
+}
+
+pub fn main() {
+    let mut stderr = io::stderr();
+
+    let args = clap_app!(getty =>
+        (author: "Jeremy Soller")
+        (about: "Set terminal mode")
+        (@arg TTY: +required "")
+        (@arg NO_CLEAR: -J --("no-clear") "Do not clear the screen before forking")
+        (@arg CONTAIN: -C --("contain") "Run contain_login instead of login")
+    )
+    .get_matches();
+
+    let clear = !args.is_present("NO_CLEAR");
+
+    let contain = args.is_present("CONTAIN");
+
+    let vt = args.value_of("TTY").unwrap();
+
+    let buf: String;
+    let vt_path = if vt.parse::<usize>().is_ok() {
+        buf = format!("/scheme/fbcon/{vt}");
+        &*buf
+    } else {
+        vt
+    };
+
+    let mut tty = match redox::open(
+        &vt_path,
+        flag::O_CLOEXEC | flag::O_RDWR | flag::O_NONBLOCK,
+        0,
+    ) {
+        Ok(fd) => unsafe { File::from_raw_fd(fd as RawFd) },
+        Err(err) => fail(
+            &format!("getty: failed to open TTY {}: {}", vt_path, err),
+            &mut stderr,
+        ),
+    };
+
+    daemon(&mut tty, clear, contain, &mut stderr);
+}

src/bin/groupadd.rs

@@ -0,0 +1,82 @@
+#[macro_use]
+extern crate clap;
+
+use extra::option::OptionalExt;
+
+use std::process::exit;
+
+use redox_users::{All, AllGroups, Config, Error, GroupBuilder};
+
+const _MAN_PAGE: &'static str = /* @MANSTART{groupadd} */
+    r#"
+NAME
+    groupadd - add a user group
+
+SYNOPSIS
+    groupadd [ -f | --force ] GROUP
+    groupadd [ -h | --help ]
+
+DESCRIPTION
+    The groupadd utility adds a new user group using values
+    passed on the command line and system defaults.
+
+OPTIONS
+    -f, --force
+        Simply forces the exit status of the program to 0
+        even if the group already exists. A message is still
+        printed to stdout.
+
+    -g, --gid GID
+        The group id to use. This value must not be used and must
+        be non-negative. The default is to pick the smallest available
+        group id (between values defined in redox_users).
+
+    -h, --help
+        Display this help and exit.
+
+AUTHOR
+    Written by Wesley Hershberger.
+"#; /* @MANEND */
+
+fn main() {
+    let args = clap_app!(groupadd =>
+        (author: "Wesley Hershberger")
+        (about: "Add groups based on the system's redox_users backend")
+        (@arg GROUP: +required  "Add group GROUP")
+        (@arg FORCE: -f --force "Force the status of the program to be 0 even if the group exists")
+        (@arg GID:   -g --gid   +takes_value "Group id. Positive integer and must not be in use")
+    )
+    .get_matches();
+
+    let mut sys_groups = AllGroups::new(Config::default().writeable(true)).unwrap_or_exit(1);
+
+    let groupname = args.value_of("GROUP").unwrap();
+
+    let gid = match args.value_of("GID") {
+        Some(gid) => {
+            let id = gid.parse::<usize>().unwrap_or_exit(1);
+            if let Some(_group) = sys_groups.get_by_id(id) {
+                eprintln!("groupadd: group already exists");
+                exit(1);
+            }
+            id
+        }
+        None => sys_groups.get_unique_id().unwrap_or_else(|| {
+            eprintln!("groupadd: no available gid");
+            exit(1);
+        }),
+    };
+
+    let group = GroupBuilder::new(groupname).gid(gid);
+    match sys_groups.add_group(group) {
+        Ok(_) => (),
+        Err(Error::GroupAlreadyExists) if args.is_present("FORCE") => {
+            exit(0);
+        }
+        Err(err) => {
+            eprintln!("groupadd: {}", err);
+            exit(1);
+        }
+    }
+    sys_groups.save().unwrap_or_exit(1);
+}

src/bin/groupdel.rs

@@ -0,0 +1,47 @@
+#[macro_use]
+extern crate clap;
+
+use extra::option::OptionalExt;
+use redox_users::{All, AllGroups, Config};
+
+const _MAN_PAGE: &'static str = /* @MANSTART{groupdel} */
+    r#"
+NAME
+    groupdel - modify system files to delete groups
+
+SYNOPSYS
+    groupdel [ options ] GROUP
+    groupdel [ -h | --help ]
+
+DESCRIPTION
+    groupdel removes groups from whatever backend is employed by
+    the system's redox_users.
+
+    Note that you should not remove a primary user group before
+    removing the user. It is also generally wise not to remove
+    groups that still own files on the system.
+
+OPTIONS
+    -h, --help
+        Print this help page and exit.
+
+AUTHORS
+    Wesley Hershberger.
+"#; /* @MANEND */
+
+fn main() {
+    let matches = clap_app!(groupdel =>
+        (author: "Wesley Hershberger")
+        (about: "Removes a group from the system using redox_users")
+        (@arg GROUP: +required "Removes group GROUP")
+    )
+    .get_matches();
+
+    let group = matches.value_of("GROUP").unwrap();
+
+    let mut sys_groups = AllGroups::new(Config::default().writeable(true)).unwrap_or_exit(1);
+
+    sys_groups.remove_by_name(group.to_string());
+
+    sys_groups.save().unwrap_or_exit(1);
+}

src/bin/groupmod.rs

@@ -0,0 +1,81 @@
+#[macro_use]
+extern crate clap;
+
+use std::process::exit;
+
+use extra::option::OptionalExt;
+use redox_users::{All, AllGroups, AllUsers, Config};
+
+const _MAN_PAGE: &'static str = /* @MANSTART{groupmod} */
+    r#"
+NAME
+    groupmod - modify group information
+
+SYNOPSYS
+    groupmod [ options ] GROUP
+    groupmod [ -h | --help ]
+
+DESCRIPTION
+    groupmod modifies a user group GROUP in the system's
+    redox_users backend.
+
+OPTIONS
+    -h, --help
+        Print this help page and exit.
+
+    -g, --gid GID
+        Change GROUP's group id. GID must be a non-negative
+        decimal integer.
+
+        Files with GROUP's old gid will not be updated.
+
+        User's who use the old gid as their primary gid will
+        be updated.
+
+    -n, --name NAME
+        The name of the group will be set to NAME
+
+AUTHORS
+    Wesley Hershberger.
+"#; /* @MANEND */
+
+fn main() {
+    let args = clap_app!(groupmod =>
+        (author: "Wesley Hershberger")
+        (about: "Modify users according to the system's redox_users backend")
+        (@arg GROUP:          +required    "Modify GROUP")
+        (@arg GID:  -g --gid  +takes_value "Change GROUP's group id. See man page for details")
+        (@arg NAME: -n --name +takes_value "Change GROUP's name")
+    )
+    .get_matches();
+
+    let groupname = args.value_of("GROUP").unwrap();
+
+    let mut sys_groups = AllGroups::new(Config::default().writeable(true)).unwrap_or_exit(1);
+    {
+        let group = sys_groups.get_mut_by_name(groupname).unwrap_or_else(|| {
+            eprintln!("groupmod: group not found: {}", groupname);
+            exit(1);
+        });
+
+        if let Some(gid) = args.value_of("GID") {
+            let gid = gid.parse::<usize>().unwrap_or_exit(1);
+            // Update users
+            let mut sys_users =
+                AllUsers::authenticator(Config::default().writeable(true)).unwrap_or_exit(1);
+            for user in sys_users.iter_mut() {
+                if user.gid == group.gid {
+                    user.gid = gid;
+                }
+            }
+            sys_users.save().unwrap_or_exit(1);
+            group.gid = gid;
+        }
+
+        if let Some(name) = args.value_of("NAME") {
+            group.group = name.to_string();
+        }
+    }
+
+    sys_groups.save().unwrap_or_exit(1);
+}

src/bin/id.rs

@@ -0,0 +1,163 @@
+#[macro_use]
+extern crate clap;
+
+use std::env::args;
+use std::process::exit;
+
+use extra::option::OptionalExt;
+use redox_users::{All, AllGroups, AllUsers, Config, get_egid, get_euid, get_gid, get_uid};
+
+const _MAN_PAGE: &'static str = /* @MANSTART{id} */
+    r#"
+NAME
+    id - display user identity
+
+SYNOPSIS
+    id
+    id -g [-nr]
+    id -u [-nr]
+    id [ -h | --help ]
+
+DESCRIPTION
+    The id utility displays the user and group names and numeric IDs, of
+    the calling process, to the standard output.
+
+OPTIONS
+    -G, --groups
+        Display the different group IDs (effective and real) as white-space
+        separated numbers, in no particular order.
+
+    -g, --group
+        Display the effective group ID as a number.
+
+    -n, --name
+        Display the name of the user or group ID for the -g and -u options
+        instead of the number.
+
+    -u, --user
+        Display the effective user ID as a number.
+
+    -a
+        Ignored for compatibility with other id implementations.
+
+    -r, --real
+        Display the real ID for the -g and -u options instead of the effective ID.
+
+    -h, --help
+        Display help and exit.
+
+AUTHOR
+    Written by Jose Narvaez.
+"#; /* @MANEND */
+
+pub fn main() {
+    let app = clap_app!(id =>
+        (author: "Jose Narvaez")
+        (about: "Get user and group information about the current user")
+        (@arg IGNORE: -a "Ignored for compatibility with other impls of id")
+        (@arg GROUPS: -G --groups conflicts_with[selector modifier] "Display current user's real and effective group id's")
+        (@group selector =>
+            (@arg GROUP: -g --group "Display current user's effective group id")
+            (@arg USER:  -u --user  "Display the effective userid")
+        )
+        (@group modifier =>
+            (@arg NAME: -n --name requires[selector] "Display names of groups/users instead of ids (use with -g or -u)")
+            (@arg REAL: -r --real requires[selector] "Display real id's instead of effective ids (use with -g and -u)")
+        )
+    );
+
+    let args = match &*args().nth(0).unwrap_or(String::new()) {
+        "whoami" => app.get_matches_from(["id", "-un"].iter()),
+        _ => app.get_matches(),
+    };
+
+    // Display the different group IDs (effective and real)
+    // as white-space separated numbers, in no particular order.
+    if args.is_present("GROUPS") {
+        let egid = get_egid().unwrap_or_exit(1);
+
+        let gid = get_gid().unwrap_or_exit(1);
+
+        println!("{} {}", egid, gid);
+        exit(0);
+    }
+
+    // Display effective/real process user ID UNIX user name
+    if args.is_present("USER") && args.is_present("NAME") {
+        // Did they pass -r? If so, we show the real
+        let uid = if args.is_present("REAL") {
+            get_uid()
+        } else {
+            get_euid()
+        }
+        .unwrap_or_exit(1);
+
+        let users = AllUsers::basic(Config::default()).unwrap_or_exit(1);
+        let user = users.get_by_id(uid).unwrap_or_exit(1);
+
+        println!("{}", user.user);
+        exit(0);
+    }
+
+    // Display real user ID
+    if args.is_present("USER") && args.is_present("REAL") {
+        let uid = get_uid().unwrap_or_exit(1);
+
+        println!("{}", uid);
+        exit(0);
+    }
+
+    // Display effective user ID
+    if args.is_present("USER") {
+        let euid = get_euid().unwrap_or_exit(1);
+
+        println!("{}", euid);
+        exit(0);
+    }
+
+    // Display effective/real process group ID UNIX group name
+    if args.is_present("GROUP") && args.is_present("NAME") {
+        // Did they pass -r? If so we show the real one
+        let gid = if args.is_present("REAL") {
+            get_gid()
+        } else {
+            get_egid()
+        }
+        .unwrap_or_exit(1);
+
+        let groups = AllGroups::new(Config::default()).unwrap_or_exit(1);
+        let group = groups.get_by_id(gid).unwrap_or_exit(1);
+
+        println!("{}", group.group);
+        exit(0);
+    }
+
+    // Display the real group ID
+    if args.is_present("GROUP") && args.is_present("REAL") {
+        let gid = get_gid().unwrap_or_exit(1);
+
+        println!("{}", gid);
+        exit(0);
+    }
+
+    // Display effective group ID
+    if args.is_present("GROUP") {
+        let egid = get_egid().unwrap_or_exit(1);
+
+        println!("{}", egid);
+        exit(0);
+    }
+
+    // We get everything we can and show
+    let euid = get_euid().unwrap_or_exit(1);
+    let egid = get_egid().unwrap_or_exit(1);
+
+    let users = AllUsers::basic(Config::default()).unwrap_or_exit(1);
+    let groups = AllGroups::new(Config::default()).unwrap_or_exit(1);
+
+    let user = users.get_by_id(euid).unwrap_or_exit(1);
+    let group = groups.get_by_id(egid).unwrap_or_exit(1);
+
+    println!("uid={}({}) gid={}({})", euid, user.user, egid, group.group);
+    exit(0);
+}

src/bin/login.rs

@@ -0,0 +1,204 @@
+#[macro_use]
+extern crate clap;
+
+use libredox::error::Result;
+use std::fs::File;
+use std::io::{self, Write};
+use std::str;
+
+use extra::option::OptionalExt;
+use redox_users::{All, AllUsers, Config, User};
+use termion::input::TermRead;
+use userutils::spawn_shell;
+
+const _MAN_PAGE: &'static str = /* @MANSTART{login} */
+    r#"
+NAME
+    login - log into the computer
+
+SYNOPSIS
+    login
+
+DESCRIPTION
+    The login utility logs users (and pseudo-users) into the computer system.
+
+OPTIONS
+
+    -h --help
+        Display help info and exit.
+
+AUTHOR
+    Written by Jeremy Soller, Jose Narvaez.
+"#; /* @MANEND */
+
+const ISSUE_FILE: &'static str = "/etc/issue";
+const MOTD_FILE: &'static str = "/etc/motd";
+
+// TODO: Move to redox_users once the definition solidifies.
+const DEFAULT_SCHEMES: [&'static str; 26] = [
+    // Kernel schemes
+    "debug",
+    "event",
+    "memory",
+    "pipe",
+    "serio",
+    "irq",
+    "time",
+    "sys",
+    // Base schemes
+    "rand",
+    "null",
+    "zero",
+    "log",
+    // Network schemes
+    "ip",
+    "icmp",
+    "tcp",
+    "udp",
+    // IPC schemes
+    "shm",
+    "chan",
+    "uds_stream",
+    "uds_dgram",
+    // File schemes
+    "file",
+    // Display schemes
+    "display.vesa",
+    "display*",
+    // Other schemes
+    "pty",
+    "sudo",
+    "audio",
+];
+pub fn apply_login_schemes(
+    user: &User<redox_users::auth::Full>,
+    default_schemes: &[&str],
+) -> Result<libredox::Fd> {
+    let schemes = match load_config_schemes(user) {
+        Some(s) => s,
+        _ => default_schemes.iter().map(|s| s.to_string()).collect(),
+    };
+
+    let mut names: Vec<ioslice::IoSlice> = Vec::with_capacity(schemes.len());
+    for scheme in schemes.iter() {
+        names.push(ioslice::IoSlice::new(scheme.as_bytes()));
+    }
+
+    let ns_fd = libredox::call::mkns(&names)?;
+    let before_ns_fd = libredox::Fd::new(libredox::call::setns(ns_fd)?);
+
+    Ok(before_ns_fd)
+}
+
+fn load_config_schemes(user: &User<redox_users::auth::Full>) -> Option<Vec<String>> {
+    use serde::{Deserialize, Serialize};
+    use std::collections::BTreeMap;
+    use std::fs;
+
+    const LOGIN_SCHEMES_FILE: &'static str = "/etc/login_schemes.toml";
+
+    #[derive(Debug, Clone, Serialize, Deserialize)]
+    struct UserSchemeConfig {
+        pub schemes: Vec<String>,
+    }
+
+    #[derive(Debug, Clone, Serialize, Deserialize)]
+    struct LoginConfig {
+        #[serde(rename = "user_schemes")]
+        pub user_schemes: BTreeMap<String, UserSchemeConfig>,
+    }
+
+    let config_str = fs::read_to_string(LOGIN_SCHEMES_FILE).ok()?;
+    let config: LoginConfig = toml::from_str(&config_str).ok()?;
+
+    config
+        .user_schemes
+        .get(&user.user)
+        .map(|cfg| cfg.schemes.clone())
+}
+
+pub fn main() {
+    let mut stdout = io::stdout();
+    let mut stderr = io::stderr();
+
+    let _args = clap_app!(login =>
+        (author: "Jeremy Soller, Jose Narvaez")
+        (about: "Login as a user")
+    )
+    .get_matches();
+
+    if let Ok(mut issue) = File::open(ISSUE_FILE) {
+        io::copy(&mut issue, &mut stdout).r#try(&mut stderr);
+        stdout.flush().r#try(&mut stderr);
+    }
+
+    loop {
+        let user = liner::Context::new()
+            .read_line(
+                liner::Prompt::from("\x1B[1mRed Bear login:\x1B[0m "),
+                None,
+                &mut liner::BasicCompleter::new(Vec::<String>::new()),
+            )
+            .r#try(&mut stderr);
+
+        if !user.is_empty() {
+            let stdin = io::stdin();
+            let mut stdin = stdin.lock();
+            let sys_users = AllUsers::authenticator(Config::default()).unwrap_or_exit(1);
+
+            match sys_users.get_by_name(user) {
+                None => {
+                    stdout.write(b"\nLogin incorrect\n").r#try(&mut stderr);
+                    stdout.write(b"\n").r#try(&mut stderr);
+                    stdout.flush().r#try(&mut stderr);
+                    continue;
+                }
+                Some(user) => {
+                    if user.is_passwd_blank() {
+                        if let Ok(mut motd) = File::open(MOTD_FILE) {
+                            io::copy(&mut motd, &mut stdout).r#try(&mut stderr);
+                            stdout.flush().r#try(&mut stderr);
+                        }
+
+                        let before_ns_fd =
+                            apply_login_schemes(user, &DEFAULT_SCHEMES).unwrap_or_exit(1);
+
+                        let _ = syscall::fcntl(
+                            before_ns_fd.raw(),
+                            syscall::F_SETFD,
+                            syscall::O_CLOEXEC,
+                        );
+                        spawn_shell(user).unwrap_or_exit(1);
+                        let _ = syscall::fcntl(before_ns_fd.raw(), syscall::F_SETFD, 0);
+                        let _ = libredox::call::close(
+                            libredox::call::setns(before_ns_fd.into_raw()).unwrap_or_exit(1),
+                        );
+                        break;
+                    }
+
+                    stdout
+                        .write_all(b"\x1B[1mpassword:\x1B[0m ")
+                        .r#try(&mut stderr);
+                    stdout.flush().r#try(&mut stderr);
+                    if let Some(password) = stdin.read_passwd(&mut stdout).r#try(&mut stderr) {
+                        stdout.write(b"\n").r#try(&mut stderr);
+                        stdout.flush().r#try(&mut stderr);
+
+                        if user.verify_passwd(&password) {
+                            if let Ok(mut motd) = File::open(MOTD_FILE) {
+                                io::copy(&mut motd, &mut stdout).r#try(&mut stderr);
+                                stdout.flush().r#try(&mut stderr);
+                            }
+
+                            spawn_shell(user).unwrap_or_exit(1);
+                            break;
+                        }
+                    }
+                }
+            }
+        } else {
+            stdout.write(b"\n").r#try(&mut stderr);
+            stdout.flush().r#try(&mut stderr);
+        }
+    }
+}

src/bin/passwd.rs

@@ -0,0 +1,197 @@
+#[macro_use]
+extern crate clap;
+
+use std::io;
+use std::io::Write;
+use std::process::exit;
+
+use extra::option::OptionalExt;
+use libredox::flag::O_CLOEXEC;
+use libredox::errno::EPERM;
+use redox_users::{All, AllUsers, Config, get_uid};
+use termion::input::TermRead;
+
+const _MAN_PAGE: &'static str = /* @MANSTART{passwd} */
+    r#"
+NAME
+    passwd - modify a user's password
+
+SYNOPSIS
+    passwd [ LOGIN ]
+    passwd [ -h | --help ]
+
+DESCRIPTION
+    The passwd utility changes the user's local password. If the user is not
+    the super-user, passwd first prompts for the current password and will
+    not continue unless the correct password is entered.
+
+OPTIONS
+
+    -h, --help
+        Display this help and exit.
+
+    -l, --lock
+        Lock the password of the named account. This changes the stored password
+        hash so that it matches no encrypted value ("!")
+
+        Users with locked passwords are not allowed to change their password.
+
+AUTHOR
+    Written by Jeremy Soller, Jose Narvaez.
+"#; /* @MANEND */
+
+fn main() {
+    let mut stdin = io::stdin().lock();
+    let mut stdout = io::stdout().lock();
+    let mut stderr = io::stderr();
+
+    let args = clap_app!(passwd =>
+        (author: "Jeremy Soller, Jose Narvaez")
+        (about: "Set user passwords")
+        (@arg LOGIN: "Apply to login. Sets password for current user if not supplied")
+        (@arg LOCK: -l --lock "Lock the password for an account (no login)")
+    )
+    .get_matches();
+
+    if args.is_present("LOCK") {
+        if get_uid().unwrap_or_exit(1) != 0 {
+            eprintln!("passwd: only root is allowed to lock accounts");
+            exit(1);
+        }
+
+        let mut users =
+            AllUsers::authenticator(Config::default().writeable(true)).unwrap_or_exit(1);
+
+        let Some(login) = args.value_of("LOGIN") else {
+            eprintln!("passwd: no account specified to lock");
+            exit(1);
+        };
+
+        let user = users.get_mut_by_name(login).unwrap_or_else(|| {
+            eprintln!("passwd: user does not exist: {}", login);
+            exit(1);
+        });
+
+        user.unset_passwd();
+        users.save().unwrap_or_exit(1);
+
+        return;
+    }
+
+    let uid = get_uid().unwrap_or_exit(1);
+
+    if uid == 0 {
+        let mut users =
+            AllUsers::authenticator(Config::default().writeable(true)).unwrap_or_exit(1);
+
+        let user = find_user(&args, &mut users);
+
+        let msg = format!("changing password for '{}' \n", user.user);
+        stdout.write_all(&msg.as_bytes()).r#try(&mut stderr);
+        stdout.flush().r#try(&mut stderr);
+
+        let new_password = ask_new_password(stdin, stdout, stderr);
+
+        user.set_passwd(&new_password).unwrap_or_exit(1);
+        users.save().unwrap_or_exit(1);
+
+        return;
+    }
+
+    let mut users = AllUsers::basic(Config::default()).unwrap_or_exit(1);
+
+    let user = find_user(&args, &mut users);
+
+    if user.uid != uid {
+        eprintln!(
+            "passwd: you do not have permission to set the password of '{}'",
+            user.user
+        );
+        exit(1);
+    }
+
+    let msg = format!("changing password for '{}' \n", user.user);
+    stdout.write_all(&msg.as_bytes()).r#try(&mut stderr);
+    stdout.flush().r#try(&mut stderr);
+
+    drop(users); // Unlock /etc/passwd
+
+    stdout.write_all(b"current password: ").r#try(&mut stderr);
+    stdout.flush().r#try(&mut stderr);
+
+    let file = libredox::call::open("/scheme/sudo/passwd", O_CLOEXEC, 0).unwrap();
+
+    if let Some(password) = stdin.read_passwd(&mut stdout).r#try(&mut stderr) {
+        stdout.write(b"\n").r#try(&mut stderr);
+        stdout.flush().r#try(&mut stderr);
+
+        match libredox::call::write(file, password.as_bytes()) {
+            Ok(_) => {}
+            Err(err) if err.errno() == EPERM => {
+                eprintln!("passwd: incorrect current password");
+                exit(1);
+            }
+            Err(err) => panic!("{err}"),
+        }
+    } else {
+        eprintln!("passwd: incorrect current password");
+        exit(1);
+    }
+
+    let new_password = ask_new_password(stdin, stdout, stderr);
+
+    match libredox::call::write(file, new_password.as_bytes()) {
+        Ok(_) => {}
+        Err(err) if err.errno() == EPERM => {
+            eprintln!("passwd: invalid new password");
+            exit(1);
+        }
+        Err(err) => panic!("{err}"),
+    }
+}
+
+fn find_user<'a, T: Default>(
+    args: &clap::ArgMatches<'_>,
+    users: &'a mut AllUsers<T>,
+) -> &'a mut redox_users::User<T> {
+    let uid = get_uid().unwrap_or_exit(1);
+    match args.value_of("LOGIN") {
+        Some(login) => users.get_mut_by_name(login).unwrap_or_else(|| {
+            eprintln!("passwd: user does not exist: {}", login);
+            exit(1);
+        }),
+        None => users.get_mut_by_id(uid).unwrap_or_else(|| {
+            eprintln!("passwd: you do not exist");
+            exit(1);
+        }),
+    }
+}
+
+fn ask_new_password(
+    mut stdin: io::StdinLock<'_>,
+    mut stdout: io::StdoutLock<'_>,
+    mut stderr: io::Stderr,
+) -> String {
+    stdout.write_all(b"new password: ").r#try(&mut stderr);
+    stdout.flush().r#try(&mut stderr);
+    let Some(new_password) = stdin.read_passwd(&mut stdout).r#try(&mut stderr) else {
+        eprintln!("passwd: no new password provided");
+        exit(1);
+    };
+
+    stdout.write(b"\nconfirm password: ").r#try(&mut stderr);
+    stdout.flush().r#try(&mut stderr);
+    let Some(confirm_password) = stdin.read_passwd(&mut stdout).r#try(&mut stderr) else {
+        eprintln!("\npasswd: no confirm password provided");
+        exit(1);
+    };
+
+    stdout.write(b"\n").r#try(&mut stderr);
+    stdout.flush().r#try(&mut stderr);
+
+    if new_password != confirm_password {
+        eprintln!("passwd: new password does not match confirm password");
+        exit(1);
+    }
+    new_password
+}

src/bin/su.rs

@@ -0,0 +1,84 @@
+#[macro_use]
+extern crate clap;
+
+use std::io::{self, Write};
+use std::process::exit;
+use std::str;
+
+use extra::option::OptionalExt;
+use libredox::flag::O_CLOEXEC;
+use redox_users::{All, AllUsers, Config, get_uid};
+use syscall::EPERM;
+use termion::input::TermRead;
+use userutils::spawn_shell;
+
+const _MAN_PAGE: &'static str = /* @MANSTART{su} */
+    r#"
+NAME
+    su - substitute user identity
+
+SYNOPSIS
+    su [ user ]
+    su [ -h | --help ]
+
+DESCRIPTION
+    The su utility requests appropriate user credentials via PAM and switches to
+    that user ID (the default user is the superuser).  A shell is then executed.
+
+OPTIONS
+
+    -h, --help
+        Display this help and exit.
+
+AUTHOR
+    Written by Jeremy Soller, Jose Narvaez.
+"#; /* @MANEND */
+
+pub fn main() {
+    let stdin = io::stdin();
+    let mut stdin = stdin.lock();
+    let stdout = io::stdout();
+    let mut stdout = stdout.lock();
+    let mut stderr = io::stderr();
+
+    let args = clap_app!(su =>
+        (author: "Jeremy Soller, Jose Narvaez")
+        (about: "substitue user identity")
+        (@arg LOGIN: "Login as LOGIN. Default is \'root\'")
+    )
+    .get_matches();
+
+    let target_user = args.value_of("LOGIN").unwrap_or("root");
+
+    let uid = get_uid().unwrap_or_exit(1);
+
+    let users = AllUsers::basic(Config::default()).unwrap_or_exit(1);
+    let user = users.get_by_name(&target_user).unwrap_or_exit(1);
+
+    // If the user executing su is root, then they can do anything without a password.
+    // Same if the user we're being asked to login as doesn't have a password.
+    if uid == 0 {
+        writeln!(stdout).unwrap_or_exit(1);
+        exit(spawn_shell(user).unwrap_or_exit(1));
+    } else {
+        let file = libredox::call::open("/scheme/sudo/su", O_CLOEXEC, 0).unwrap();
+
+        write!(stdout, "password: ").unwrap_or_exit(1);
+        stdout.flush().unwrap_or_exit(1);
+
+        // Read the password, reading an empty string if CTRL-d is specified
+        let password = stdin
+            .read_passwd(&mut stdout)
+            .r#try(&mut stderr)
+            .unwrap_or(String::new());
+
+        match libredox::call::write(file, password.as_bytes()) {
+            Ok(_) => exit(spawn_shell(user).unwrap_or_exit(1)),
+            Err(err) if err.errno() == EPERM => {
+                writeln!(stderr, "su: authentication failed").unwrap_or_exit(1);
+                exit(1);
+            }
+            Err(err) => panic!("{err}"),
+        }
+    }
+}

src/bin/sudo.rs

@@ -0,0 +1,402 @@
+use std::collections::HashMap;
+use std::env;
+use std::io::{self, Write};
+use std::os::fd::{AsRawFd, FromRawFd, OwnedFd, RawFd};
+use std::os::unix::process::CommandExt;
+use std::process::{Command, exit};
+
+use extra::option::OptionalExt;
+use libredox::flag::O_CLOEXEC;
+use libredox::protocol::ProcCall;
+use redox_rt::sys::proc_call;
+use redox_scheme::scheme::{SchemeSync, register_sync_scheme};
+use redox_scheme::{
+    CallerCtx, OpenResult, RequestKind, Response, SendFdRequest, SignalBehavior, Socket,
+};
+use redox_users::{All, AllGroups, AllUsers, Config, get_uid};
+use syscall::error::*;
+use syscall::flag::*;
+use syscall::schemev2::NewFdFlags;
+use termion::input::TermRead;
+
+const MAX_ATTEMPTS: u16 = 3;
+const _MAN_PAGE: &'static str = /* @MANSTART{sudo} */
+    r#"
+NAME
+    sudo - execute a command as another user
+
+SYNOPSIS
+    sudo command
+    sudo [ -h | --help ]
+
+DESCRIPTION
+    The sudo utility allows a permitted user to execute a command as the
+    superuser or another user, as specified by the security policy.
+
+EXIT STATUS
+    Upon successful execution of a command, the exit status from sudo will
+    be the exit status of the program that was executed. In case of error
+    the exit status will be >0.
+
+AUTHOR
+    Written by Jeremy Soller, Jose Narvaez, bjorn3.
+"#; /* @MANEND */
+
+fn main() {
+    if env::args().nth(1).as_deref() == Some("--daemon") {
+        daemon_main();
+    }
+
+    let mut args = env::args().skip(1);
+    let cmd = args.next().unwrap_or_else(|| {
+        eprintln!("sudo: no command provided");
+        exit(1);
+    });
+
+    let users = AllUsers::basic(Config::default()).unwrap_or_exit(1);
+    let uid = get_uid().unwrap_or_exit(1);
+    let user = users.get_by_id(uid).unwrap_or_exit(1);
+
+    if uid == 0 {
+        // We are root already. No need to elevate privileges
+        run_command_as_root(&cmd, &args.collect());
+    }
+
+    let file = libredox::call::open("/scheme/sudo", O_CLOEXEC, 0).unwrap();
+
+    let mut attempts = 0;
+
+    loop {
+        print!("[sudo] password for {}: ", user.user);
+        let _ = io::stdout().flush();
+
+        match io::stdin().read_passwd(&mut io::stdout()).unwrap() {
+            Some(password) => {
+                println!();
+
+                match libredox::call::write(file, password.as_bytes()) {
+                    Ok(_) => break,
+                    Err(err) if err.errno() == EPERM => {
+                        attempts += 1;
+                        eprintln!(
+                            "sudo: incorrect password or not in sudo group ({}/{})",
+                            attempts, MAX_ATTEMPTS,
+                        );
+                        if attempts >= MAX_ATTEMPTS {
+                            exit(1);
+                        }
+                    }
+                    Err(err) => panic!("{err}"),
+                }
+            }
+            None => {
+                println!();
+                exit(1);
+            }
+        }
+    }
+
+    // FIXME move to libredox
+    unsafe extern "C" {
+        safe fn redox_cur_procfd_v0() -> usize;
+    }
+
+    // Elevate privileges of our own process with help from the sudo daemon
+    syscall::sendfd(
+        file,
+        syscall::dup(redox_cur_procfd_v0(), &[]).unwrap(),
+        0,
+        0,
+    )
+    .unwrap();
+
+    // FIXME perhaps keep the original namespace available in a subdirectory of the namespace we switch to?
+    let ns = syscall::openat(file, "ns", 0, syscall::O_CLOEXEC).unwrap();
+    libredox::call::setns(ns).unwrap();
+
+    run_command_as_root(&cmd, &args.collect());
+}
+
+enum Policy {
+    Deny,
+    Authenticate,
+}
+
+fn policy_for_user(uid: u32) -> Policy {
+    let users = AllUsers::authenticator(Config::default()).unwrap_or_exit(1);
+    let groups = AllGroups::new(Config::default()).unwrap_or_exit(1);
+
+    let user = users.get_by_id(uid as usize).unwrap_or_exit(1);
+
+    let sudo_group = groups.get_by_name("sudo").unwrap_or_exit(1);
+    if !sudo_group.users.iter().any(|name| name == &user.user) {
+        return Policy::Deny;
+    }
+
+    Policy::Authenticate
+}
+
+fn run_command_as_root(cmd: &str, args: &Vec<String>) -> ! {
+    let mut command = Command::new(&cmd);
+    for arg in args {
+        command.arg(&arg);
+    }
+
+    command.uid(0);
+    command.gid(0);
+    command.env("USER", "root");
+    command.env("UID", "0");
+    command.env("GROUPS", "0");
+
+    let err = command.exec();
+
+    eprintln!("sudo: failed to execute {}: {}", cmd, err);
+    exit(1);
+}
+
+struct Scheme {
+    next_fd: usize,
+    handles: HashMap<usize, Handle>,
+}
+enum Handle {
+    AwaitingPassword { uid: u32 },
+    AwaitingRootPassword,
+    AwaitingContextFd,
+    AwaitingNamespaceFetch { ns: libredox::Fd },
+
+    AwaitingPasswordForPasswd { uid: u32 },
+    AwaitingNewPassword { uid: u32 },
+
+    Placeholder,
+
+    SchemeRoot,
+}
+
+impl SchemeSync for Scheme {
+    fn scheme_root(&mut self) -> Result<usize> {
+        let fd = self.next_fd;
+        self.next_fd = self.next_fd.checked_add(1).ok_or(Error::new(EMFILE))?;
+        self.handles.insert(fd, Handle::SchemeRoot);
+        Ok(fd)
+    }
+    fn openat(
+        &mut self,
+        dirfd: usize,
+        path: &str,
+        _flags: usize,
+        _fcntl_flags: u32,
+        ctx: &CallerCtx,
+    ) -> Result<OpenResult> {
+        let handle = match self.handles.get_mut(&dirfd).ok_or(Error::new(EBADF))? {
+            Handle::SchemeRoot => match path {
+                "" => Handle::AwaitingPassword { uid: ctx.uid },
+                "su" => Handle::AwaitingRootPassword,
+                "passwd" => Handle::AwaitingPasswordForPasswd { uid: ctx.uid },
+                _ => return Err(Error::new(ENOENT)),
+            },
+            Handle::AwaitingNamespaceFetch { .. } => {
+                if path != "ns" {
+                    return Err(Error::new(ENOENT));
+                }
+                let ns = match self.handles.insert(dirfd, Handle::Placeholder).unwrap() {
+                    Handle::AwaitingNamespaceFetch { ns } => ns,
+                    _ => unreachable!(),
+                };
+                return Ok(OpenResult::OtherScheme { fd: ns.into_raw() });
+            }
+            _ => return Err(Error::new(EINVAL)),
+        };
+
+        let fd = self.next_fd;
+        self.next_fd = self.next_fd.checked_add(1).ok_or(Error::new(EMFILE))?;
+        self.handles.insert(fd, handle);
+
+        Ok(OpenResult::ThisScheme {
+            number: fd,
+            flags: NewFdFlags::empty(),
+        })
+    }
+
+    fn write(
+        &mut self,
+        id: usize,
+        buf: &[u8],
+        _off: u64,
+        _flags: u32,
+        _ctx: &CallerCtx,
+    ) -> Result<usize> {
+        let handle = self.handles.get_mut(&id).ok_or(Error::new(EBADF))?;
+
+        let validate_utf8 = |buf| std::str::from_utf8(buf).map_err(|_| Error::new(EINVAL));
+
+        match std::mem::replace(handle, Handle::Placeholder) {
+            Handle::AwaitingPassword { uid } => {
+                let users = AllUsers::authenticator(Config::default()).unwrap_or_exit(1);
+                let user = users.get_by_id(uid as usize).unwrap_or_exit(1);
+
+                match policy_for_user(uid) {
+                    Policy::Deny => {
+                        *handle = Handle::AwaitingPassword { uid };
+                        return Err(Error::new(EPERM));
+                    }
+                    Policy::Authenticate => {
+                        let password = validate_utf8(buf)?;
+                        if user.verify_passwd(&password) {
+                            *handle = Handle::AwaitingContextFd
+                        } else {
+                            *handle = Handle::AwaitingPassword { uid };
+                            return Err(Error::new(EPERM));
+                        }
+                    }
+                }
+            }
+            Handle::AwaitingRootPassword => {
+                let users = AllUsers::authenticator(Config::default()).unwrap_or_exit(1);
+                let user = users.get_by_id(0).unwrap_or_exit(1);
+
+                let password = validate_utf8(buf)?;
+                if user.verify_passwd(&password) {
+                    *handle = Handle::AwaitingContextFd
+                } else {
+                    *handle = Handle::AwaitingRootPassword;
+                    return Err(Error::new(EPERM));
+                }
+            }
+            Handle::AwaitingContextFd => {
+                *handle = Handle::AwaitingContextFd;
+                return Err(Error::new(EINVAL));
+            }
+
+            Handle::AwaitingPasswordForPasswd { uid } => {
+                let users =
+                    AllUsers::authenticator(Config::default()).map_err(|_| Error::new(ENOLCK))?;
+                let user = users.get_by_id(uid as usize).ok_or(Error::new(EEXIST))?;
+
+                let password = validate_utf8(buf)?;
+                if user.verify_passwd(&password) {
+                    *handle = Handle::AwaitingNewPassword { uid }
+                } else {
+                    *handle = Handle::AwaitingPasswordForPasswd { uid };
+                    return Err(Error::new(EPERM));
+                }
+            }
+            Handle::AwaitingNewPassword { uid } => {
+                let mut users = AllUsers::authenticator(Config::default().writeable(true))
+                    .map_err(|_| Error::new(ENOLCK))?;
+                let user = users
+                    .get_mut_by_id(uid as usize)
+                    .ok_or(Error::new(EEXIST))?;
+
+                let new_password = validate_utf8(buf)?;
+                if user.set_passwd(&new_password).is_ok() {
+                    users.save().map_err(|_| Error::new(ENOLCK))?;
+                    *handle = Handle::Placeholder
+                } else {
+                    *handle = Handle::AwaitingNewPassword { uid };
+                    return Err(Error::new(EPERM));
+                }
+            }
+
+            Handle::AwaitingNamespaceFetch { .. } => {
+                eprintln!("sudo: found namespace fetch handle with ID {id}");
+                return Err(Error::new(EBADFD));
+            }
+
+            Handle::Placeholder => {
+                eprintln!("sudo: found placeholder handle with ID {id}");
+                return Err(Error::new(EBADFD));
+            }
+
+            Handle::SchemeRoot => {
+                eprintln!("sudo: found Scheme root handle with ID {id}");
+                return Err(Error::new(EBADFD));
+            }
+        }
+        Ok(buf.len())
+    }
+}
+impl Scheme {
+    fn on_close(&mut self, id: usize) {
+        self.handles.remove(&id);
+    }
+
+    fn on_sendfd(&mut self, socket: &Socket, req: &SendFdRequest) -> Result<usize> {
+        let handle = self.handles.get_mut(&req.id()).ok_or(Error::new(EBADF))?;
+        match std::mem::replace(handle, Handle::Placeholder) {
+            Handle::AwaitingContextFd => {
+                let mut proc_fd = usize::MAX;
+                req.obtain_fd(
+                    socket,
+                    FobtainFdFlags::empty(),
+                    std::slice::from_mut(&mut proc_fd),
+                )?;
+                let proc_fd = unsafe { OwnedFd::from_raw_fd(proc_fd as RawFd) };
+
+                let [ruid, euid, suid] = [0, 0, 0];
+                let [rgid, egid, sgid] = [0, 0, 0];
+                let mut payload = [0; size_of::<u32>() * 6];
+                plain::slice_from_mut_bytes(&mut payload)
+                    .unwrap()
+                    .copy_from_slice(&[ruid, euid, suid, rgid, egid, sgid]);
+
+                if let Err(err) = proc_call(
+                    proc_fd.as_raw_fd() as usize,
+                    &mut payload,
+                    CallFlags::empty(),
+                    &[ProcCall::SetResugid as u64],
+                ) {
+                    eprintln!("failed to setresugid: {err}");
+                }
+
+                *handle = Handle::AwaitingNamespaceFetch {
+                    ns: libredox::Fd::new(
+                        syscall::dup(libredox::call::getns().unwrap(), b"").unwrap(),
+                    ),
+                };
+            }
+            old => {
+                *handle = old;
+                return Err(Error::new(EBADF));
+            }
+        }
+        Ok(0)
+    }
+}
+
+fn daemon_main() -> ! {
+    // TODO: Linux kernel audit-like logging?
+    let socket = Socket::create().expect("failed to open scheme socket");
+
+    let mut scheme = Scheme {
+        next_fd: 1,
+        handles: HashMap::new(),
+    };
+    let mut scheme_state = redox_scheme::scheme::SchemeState::new();
+
+    register_sync_scheme(&socket, "sudo", &mut scheme)
+        .expect("failed to register sudo scheme to namespace");
+
+    loop {
+        let Some(req) = socket
+            .next_request(SignalBehavior::Restart)
+            .expect("failed to get request")
+        else {
+            break;
+        };
+
+        let response = match req.kind() {
+            RequestKind::Call(call) => call.handle_sync(&mut scheme, &mut scheme_state),
+            RequestKind::SendFd(req) => Response::new(scheme.on_sendfd(&socket, &req), req),
+            RequestKind::OnClose { id } => {
+                scheme.on_close(id);
+                continue;
+            }
+            _ => continue,
+        };
+
+        socket
+            .write_response(response, SignalBehavior::Restart)
+            .expect("sudo: scheme write failed");
+    }
+    std::process::exit(0)
+}

src/bin/useradd.rs

@@ -0,0 +1,205 @@
+#[macro_use]
+extern crate clap;
+
+use std::process::exit;
+
+use extra::option::OptionalExt;
+use redox_users::{All, AllGroups, AllUsers, Config, GroupBuilder, UserBuilder};
+use userutils::create_user_dir;
+
+const _MAN_PAGE: &'static str = /* @MANSTART{useradd} */
+    r#"
+NAME
+    useradd - add a new user
+
+SYNOPSYS
+    useradd [ options ] LOGIN
+    useradd [ -h | --help ]
+
+DESCRIPTION
+    The useradd utility creates a new user based on
+    system defaults and values passed on the command line.
+
+    Useradd creates a new group for the user by default and
+    can also be instructed to create the user's home directory.
+
+    Note that useradd creates a new user with the password
+    unset (no login). This is better documented with the
+    redox_users crate.
+
+OPTIONS
+    -h, --help
+        Display this help and exit.
+
+    -c, --comment
+        Any text string, usually used as the user's full name.
+        Historically known as the GECOS field
+
+    -d, --home-dir HOME_DIR
+        The new user will be created with HOME_DIR as their home
+        directory. The default value is LOGIN prepended with "/home/".
+        This flag DOES NOT create the home directory. See --create-home
+
+    -g, --gid GID
+        The group id to use when creating the default login group. This value
+        must not be in use and must be non-negative. The default is to pick the
+        smallest available group id between values defined in redox_users.
+
+    -m, --create-home
+        Creates the user's home directory if it does not already exist.
+
+        This option is not enabled by default. This option must be specified
+        for a home directory to be created. If not set, the user's home dir is
+        set to "/"
+
+    -N, --no-user-group
+        Do not attempt to create the user's user group. Instead, the groupid
+        is set to 99 ("nobody"). -N and -g are mutually exclusive.
+
+    -s, --shell SHELL
+        The path to the user's default login shell. If not specified, the
+        default shell is set as "/bin/ion"
+
+    -u, --uid UID
+        The user id to use. This value must not be in use and must be
+        non-negative. The default is to pick the smallest available
+        user id between the defaults defined in redox_users
+
+AUTHORS
+    Written by Wesley Hershberger.
+"#; /* @MANEND */
+const DEFAULT_SHELL: &'static str = "/bin/ion";
+const DEFAULT_HOME: &'static str = "/home";
+const DEFAULT_NO_GROUP: &'static str = "nobody";
+
+fn main() {
+    let args = clap_app!(useradd =>
+        (author: "Wesley Hershberger")
+        (about: "Add users based on the system's redox_users backend")
+        (@arg LOGIN:
+            +required
+            "Add user LOGIN")
+        (@arg COMMENT:
+            -c --comment
+            +takes_value
+            "Set user description (GECOS field)")
+        (@arg HOME_DIR:
+            -d --("home-dir")
+            +takes_value
+            "Set LOGIN's home dir to HOME_DIR (does not create directory)")
+        (@arg CREATE_HOME:
+            -m --("create-home")
+            "Create the user's home directory")
+        (@arg SHELL:
+            -s --shell
+            +takes_value
+            "Set user's default login shell")
+        (@arg GID:
+            -g --gid
+            +takes_value
+            "Set LOGIN's primary group id. Positive integer and must not be in use.")
+        (@arg NO_USER_GROUP:
+            -N --("no-user-group")
+            conflicts_with[GID]
+            "Do not create primary user group (set gid to 99, \"nobody\")")
+        (@arg UID:
+            -u --uid
+            +takes_value
+            "Set LOGIN's user id. Positive ineger and must not be in use.")
+    )
+    .get_matches();
+
+    // unwrap is safe because of "+required". clap-rs is cool...
+    let login = args.value_of("LOGIN").unwrap();
+
+    let mut sys_users =
+        AllUsers::authenticator(Config::default().writeable(true)).unwrap_or_exit(1);
+    let mut sys_groups = AllGroups::new(Config::default().writeable(true)).unwrap_or_exit(1);
+
+    let uid = match args.value_of("UID") {
+        Some(uid) => {
+            let id = uid.parse::<usize>().unwrap_or_exit(1);
+            if let Some(_user) = sys_users.get_by_id(id) {
+                eprintln!("useradd: userid already in use: {}", id);
+                exit(1);
+            }
+            id
+        }
+        None => sys_users.get_unique_id().unwrap_or_else(|| {
+            eprintln!("useradd: no available uid");
+            exit(1);
+        }),
+    };
+
+    let gid = if args.is_present("NO_USER_GROUP") {
+        let nobody = sys_groups
+            .get_mut_by_name(DEFAULT_NO_GROUP)
+            .unwrap_or_else(|| {
+                eprintln!("useradd: group not found: {}", DEFAULT_NO_GROUP);
+                exit(1)
+            });
+        nobody.users.push(login.to_string());
+        99
+    } else {
+        let id = match args.value_of("GID") {
+            Some(id) => {
+                let id = id.parse::<usize>().unwrap_or_exit(1);
+                if let Some(_group) = sys_groups.get_by_id(id) {
+                    eprintln!("useradd: group already exists with gid: {}", id);
+                    exit(1);
+                }
+                id
+            }
+            None => sys_groups.get_unique_id().unwrap_or_else(|| {
+                eprintln!("useradd: no available gid");
+                exit(1);
+            }),
+        };
+        sys_groups
+            .add_group(GroupBuilder::new(login).gid(id).user(login))
+            .unwrap_or_else(|err| {
+                eprintln!("useradd: {}: {}", err, login);
+                exit(1);
+            });
+        id
+    };
+
+    let gecos = args.value_of("COMMENT").unwrap_or(login);
+
+    //Ugly way to satisfy the borrow checker...
+    let mut sys_homes = String::from(DEFAULT_HOME);
+    let userhome = args.value_of("HOME_DIR").unwrap_or_else(|| {
+        if args.is_present("CREATE_HOME") {
+            sys_homes.push_str("/");
+            sys_homes.push_str(&login);
+            sys_homes.as_str()
+        } else {
+            "/"
+        }
+    });
+
+    let shell = args.value_of("SHELL").unwrap_or(DEFAULT_SHELL);
+
+    let user = UserBuilder::new(login)
+        .uid(uid)
+        .gid(gid)
+        .name(gecos)
+        .home(userhome)
+        .shell(shell);
+    sys_users.add_user(user).unwrap_or_else(|err| {
+        eprintln!("useradd: {}: {}", err, login);
+        exit(1);
+    });
+
+    // Make sure to try and create the user/groups before we create
+    // their home, that way we get a permissions error that makes
+    // more sense
+    sys_groups.save().unwrap_or_exit(1);
+    sys_users.save().unwrap_or_exit(1);
+
+    if args.is_present("CREATE_HOME") {
+        //Shouldn't ever error...
+        let user = sys_users.get_by_id(uid).unwrap_or_exit(1);
+        create_user_dir(user, userhome).unwrap_or_exit(1);
+    }
+}

src/bin/userdel.rs

@@ -0,0 +1,69 @@
+#[macro_use]
+extern crate clap;
+
+use std::fs::remove_dir;
+use std::process::exit;
+
+use extra::option::OptionalExt;
+use redox_users::{All, AllGroups, AllUsers, Config};
+use userutils::AllGroupsExt;
+
+const _MAN_PAGE: &'static str = /* @MANSTART{userdel} */
+    r#"
+NAME
+    userdel - modify system files to delete users
+
+SYNOPSYS
+    userdel [ options ] LOGIN
+    userdel [ -h | --help ]
+
+DESCRIPTION
+    userdel removes users from whatever backend is employed by
+    the system's redox_users. The utility removes the user from
+    all groups of which they are a member.
+
+    It can also be used to manage removal of home directories.
+
+OPTIONS
+    -h, --help
+        Print this help page and exit.
+
+    -r, --remove
+        The user's home directory and all files inside will be
+        removed.
+
+AUTHORS
+    Wesley Hershberger.
+"#; /* @MANEND */
+
+fn main() {
+    let args = clap_app!(userdel =>
+        (author: "Wesley Hershberger")
+        (about: "Removes system users using redox_users")
+        (@arg LOGIN: +required "Remove user LOGIN")
+        (@arg REMOVE: -r --remove "Remove the user's home and all files and directories inside")
+    )
+    .get_matches();
+
+    let login = args.value_of("LOGIN").unwrap();
+
+    let mut sys_users =
+        AllUsers::authenticator(Config::default().writeable(true)).unwrap_or_exit(1);
+    let mut sys_groups = AllGroups::new(Config::default().writeable(true)).unwrap_or_exit(1);
+    {
+        sys_groups.remove_user_from_all_groups(login);
+
+        if args.is_present("REMOVE") {
+            let user = sys_users.get_by_name(login).unwrap_or_else(|| {
+                eprintln!("userdel: user does not exist: {}", login);
+                exit(1);
+            });
+            remove_dir(&user.home).unwrap_or_exit(1);
+        }
+    }
+
+    sys_users.remove_by_name(login.to_string());
+
+    sys_groups.save().unwrap_or_exit(1);
+    sys_users.save().unwrap_or_exit(1);
+}

src/bin/usermod.rs

@@ -0,0 +1,196 @@
+#[macro_use]
+extern crate clap;
+
+use std::fs::{remove_dir, rename};
+use std::process::exit;
+
+use extra::option::OptionalExt;
+use redox_users::{All, AllGroups, AllUsers, Config};
+use userutils::{AllGroupsExt, create_user_dir};
+
+const _MAN_PAGE: &'static str = /* @MANSTART{usermod} */
+    r#"
+NAME
+    usermod - modify user information
+
+SYNOPSYS
+    usermod [ options ] LOGIN
+    usermod [ -h | --help ]
+
+DESCRIPTION
+    The usermod utility can be used to modify user information.
+
+    This utility uses the redox_users API, so the backend is whatever
+    backend in use on the system for that API at the time.
+
+    See passwd for setting user passwords.
+
+OPTIONS
+    -h, --help
+        Display this help and exit.
+
+    -c, --comment COMMENT
+        The comment field (or GECOS, historically) for the user. This
+        is typically the full name of the user, although sometimes it
+        includes an e-mail.
+
+    -d, --home-dir HOME_DIR
+        Sets the home directory to HOME_DIR and creates the directory.
+        See -m for move
+
+    -m, --move-home
+        Moves the the user's old home directory into the home directory
+        specified by --home-dir. Has no effect if passed without --home-dir
+
+    -G, --append-groups GROUP[,GROUP, ...]
+        Add this user to GROUP groups. This does not remove the user from
+        any group of which they are already a member.
+
+    -S, --set-groups GROUP[,GROUP, ...]
+        Remove the user from all groups of which they are a part and add
+        them to GROUP groups.
+
+    -g, --gid GID
+        Set the user's primary group id. If the group does not exist,
+        a warning is issued and no changes are applied.
+
+    -l, --login NEW_LOGIN
+        Set the new login name for the user. Must not be in use.
+
+    -s, --shell SHELL
+        Set the user's login shell as SHELL. This must be a full path.
+
+    -u, --uid UID
+        Set the user's user id. If another user's userid is the same as
+        UID, a warning is issued and no changes are applied. Note that
+        changing the value of the user's userid may have unexpected consequences.
+
+AUTHORS
+    Written by Wesley Hershberger.
+"#; /* @MANEND */
+
+fn main() {
+    let args = clap_app!(usermod =>
+        (author: "Wesley Hershberger")
+        (about: "Modify users according to the system's redox_users backend")
+        (@arg LOGIN:
+            +required
+            "Apply modifications to LOGIN")
+        (@arg COMMENT:
+            -c --comment
+            +takes_value
+            "Set LOGIN's description (GECOS field)")
+        (@arg HOME_DIR:
+            -d --("home-dir")
+            +takes_value
+            "Create and set LOGIN's home directory")
+        (@arg MOVE_HOME:
+            -m --("move-home")
+            requires[HOME_DIR]
+            "Move LOGIN's old home to HOME_DIR (see --home-dir) instead of creating it. Requires -d")
+        (@arg APPEND_GROUPS:
+            -G --("append-groups")
+            +takes_value conflicts_with[SET_GROUPS]
+            "Add user to groups specified (comma separated list, see man page)")
+        (@arg SET_GROUPS:
+            -S --("set-groups")
+            +takes_value conflicts_with[APPEND_GROUPS]
+            "Set LOGIN's groups as specified (truncates existing, see man page)")
+        (@arg GID:
+            -g --gid
+            +takes_value
+            "Set LOGIN's primary group id. Group must exist")
+        (@arg NEW_LOGIN:
+            -l --login
+            +takes_value
+            "Set LOGIN's name to NEW_LOGIN")
+        (@arg SHELL:
+            -s --shell
+            +takes_value
+            "Set LOGIN's default login shell")
+        (@arg UID:
+            -u --uid
+            +takes_value
+            "Set LOGIN's user id. See man page for details")
+    ).get_matches();
+
+    let login = args.value_of("LOGIN").unwrap();
+
+    //TODO: Does not always need shadowfile access
+    let mut sys_users =
+        AllUsers::authenticator(Config::default().writeable(true)).unwrap_or_exit(1);
+    let mut sys_groups;
+
+    if let Some(new_groups) = args.value_of("SET_GROUPS") {
+        sys_groups = AllGroups::new(Config::default().writeable(true)).unwrap_or_exit(1);
+        sys_groups.remove_user_from_all_groups(login);
+        sys_groups
+            .add_user_to_groups(login, new_groups.split(',').collect())
+            .unwrap_or_exit(1);
+        sys_groups.save().unwrap_or_exit(1);
+    }
+
+    if let Some(new_groups) = args.value_of("APPEND_GROUPS") {
+        sys_groups = AllGroups::new(Config::default().writeable(true)).unwrap_or_exit(1);
+        sys_groups
+            .add_user_to_groups(login, new_groups.split(',').collect())
+            .unwrap_or_exit(1);
+        sys_groups.save().unwrap_or_exit(1);
+    }
+
+    let uid = args.value_of("UID").map(|uid| {
+        let uid = uid.parse::<usize>().unwrap_or_exit(1);
+        if let Some(_user) = sys_users.get_by_id(uid) {
+            eprintln!("usermod: userid already in use: {}", uid);
+            exit(1);
+        }
+        uid
+    });
+
+    {
+        let user = sys_users.get_mut_by_name(&login).unwrap_or_else(|| {
+            eprintln!("usermod: user \"{}\" not found", login);
+            exit(1);
+        });
+
+        if let Some(gecos) = args.value_of("COMMENT") {
+            user.name = gecos.to_string();
+        }
+
+        if let Some(new_login) = args.value_of("NEW_LOGIN") {
+            user.user = new_login.to_string();
+        }
+
+        if let Some(shell) = args.value_of("SHELL") {
+            user.shell = shell.to_string();
+        }
+
+        if let Some(home) = args.value_of("HOME_DIR") {
+            if args.is_present("MOVE_HOME") {
+                rename(&user.home, &home).unwrap_or_exit(1);
+            } else {
+                create_user_dir(user, &home).unwrap_or_exit(1);
+                remove_dir(&user.home).unwrap_or_exit(1);
+            }
+            user.home = home.to_string();
+        }
+
+        if let Some(uid) = uid {
+            user.uid = uid;
+        }
+
+        if let Some(gid) = args.value_of("GID") {
+            sys_groups = AllGroups::new(Config::default()).unwrap_or_exit(1);
+            let gid = gid.parse::<usize>().unwrap_or_exit(1);
+
+            if let Some(_group) = sys_groups.get_by_id(gid) {
+                user.gid = gid;
+            } else {
+                eprintln!("usermod: no group found for id: {}", gid);
+                exit(1);
+            }
+        }
+    }
+
+    sys_users.save().unwrap_or_exit(1);
+}

src/call.rs

@@ -1,410 +0,0 @@
-use super::{
-    arch::*,
-    data::{Map, Stat, StatVfs, StdFsCallMeta, TimeSpec},
-    error::Result,
-    flag::*,
-    number::*,
-};
-
-use core::mem;
-
-/// Close a file
-pub fn close(fd: usize) -> Result<usize> {
-    unsafe { syscall1(SYS_CLOSE, fd) }
-}
-
-/// Get the current system time
-pub fn clock_gettime(clock: usize, tp: &mut TimeSpec) -> Result<usize> {
-    unsafe { syscall2(SYS_CLOCK_GETTIME, clock, tp as *mut TimeSpec as usize) }
-}
-
-/// Copy and transform a file descriptor
-pub fn dup(fd: usize, buf: &[u8]) -> Result<usize> {
-    unsafe { syscall3(SYS_DUP, fd, buf.as_ptr() as usize, buf.len()) }
-}
-
-/// Copy and transform a file descriptor
-pub fn dup2(fd: usize, newfd: usize, buf: &[u8]) -> Result<usize> {
-    unsafe { syscall4(SYS_DUP2, fd, newfd, buf.as_ptr() as usize, buf.len()) }
-}
-
-/// Change file permissions
-pub fn fchmod(fd: usize, mode: u16) -> Result<usize> {
-    unsafe { syscall2(SYS_FCHMOD, fd, mode as usize) }
-}
-
-/// Change file ownership
-pub fn fchown(fd: usize, uid: u32, gid: u32) -> Result<usize> {
-    unsafe { syscall3(SYS_FCHOWN, fd, uid as usize, gid as usize) }
-}
-
-/// Change file descriptor flags
-pub fn fcntl(fd: usize, cmd: usize, arg: usize) -> Result<usize> {
-    unsafe { syscall3(SYS_FCNTL, fd, cmd, arg) }
-}
-
-/// Map a file into memory, but with the ability to set the address to map into, either as a hint
-/// or as a requirement of the map.
-///
-/// # Errors
-/// `EACCES` - the file descriptor was not open for reading
-/// `EBADF` - if the file descriptor was invalid
-/// `ENODEV` - mmapping was not supported
-/// `EINVAL` - invalid combination of flags
-/// `EEXIST` - if [`MapFlags::MAP_FIXED`] was set, and the address specified was already in use.
-///
-pub unsafe fn fmap(fd: usize, map: &Map) -> Result<usize> {
-    syscall3(
-        SYS_FMAP,
-        fd,
-        map as *const Map as usize,
-        mem::size_of::<Map>(),
-    )
-}
-
-/// Unmap whole (or partial) continous memory-mapped files
-pub unsafe fn funmap(addr: usize, len: usize) -> Result<usize> {
-    syscall2(SYS_FUNMAP, addr, len)
-}
-
-/// Retrieve the canonical path of a file
-pub fn fpath(fd: usize, buf: &mut [u8]) -> Result<usize> {
-    unsafe { syscall3(SYS_FPATH, fd, buf.as_mut_ptr() as usize, buf.len()) }
-}
-
-/// Create a link to a file
-pub fn flink<T: AsRef<str>>(fd: usize, path: T) -> Result<usize> {
-    let path = path.as_ref();
-    unsafe { syscall3(SYS_FLINK, fd, path.as_ptr() as usize, path.len()) }
-}
-
-/// Rename a file
-pub fn frename<T: AsRef<str>>(fd: usize, path: T) -> Result<usize> {
-    let path = path.as_ref();
-    unsafe { syscall3(SYS_FRENAME, fd, path.as_ptr() as usize, path.len()) }
-}
-
-/// Get metadata about a file
-pub fn fstat(fd: usize, stat: &mut Stat) -> Result<usize> {
-    unsafe {
-        syscall3(
-            SYS_FSTAT,
-            fd,
-            stat as *mut Stat as usize,
-            mem::size_of::<Stat>(),
-        )
-    }
-}
-
-/// Get metadata about a filesystem
-pub fn fstatvfs(fd: usize, stat: &mut StatVfs) -> Result<usize> {
-    unsafe {
-        syscall3(
-            SYS_FSTATVFS,
-            fd,
-            stat as *mut StatVfs as usize,
-            mem::size_of::<StatVfs>(),
-        )
-    }
-}
-
-/// Sync a file descriptor to its underlying medium
-pub fn fsync(fd: usize) -> Result<usize> {
-    unsafe { syscall1(SYS_FSYNC, fd) }
-}
-
-/// Truncate or extend a file to a specified length
-pub fn ftruncate(fd: usize, len: usize) -> Result<usize> {
-    unsafe { syscall2(SYS_FTRUNCATE, fd, len) }
-}
-
-// Change modify and/or access times
-pub fn futimens(fd: usize, times: &[TimeSpec]) -> Result<usize> {
-    unsafe {
-        syscall3(
-            SYS_FUTIMENS,
-            fd,
-            times.as_ptr() as usize,
-            mem::size_of_val(times),
-        )
-    }
-}
-
-/// Fast userspace mutex
-pub unsafe fn futex(
-    addr: *mut i32,
-    op: usize,
-    val: i32,
-    val2: usize,
-    addr2: *mut i32,
-) -> Result<usize> {
-    syscall5(
-        SYS_FUTEX,
-        addr as usize,
-        op,
-        (val as isize) as usize,
-        val2,
-        addr2 as usize,
-    )
-}
-
-/// Seek to `offset` bytes in a file descriptor
-pub fn lseek(fd: usize, offset: isize, whence: usize) -> Result<usize> {
-    unsafe { syscall3(SYS_LSEEK, fd, offset as usize, whence) }
-}
-
-/// Make a new scheme namespace
-pub fn mkns(schemes: &[[usize; 2]]) -> Result<usize> {
-    unsafe { syscall2(SYS_MKNS, schemes.as_ptr() as usize, schemes.len()) }
-}
-
-/// Change mapping flags
-pub unsafe fn mprotect(addr: usize, size: usize, flags: MapFlags) -> Result<usize> {
-    syscall3(SYS_MPROTECT, addr, size, flags.bits())
-}
-
-/// Sleep for the time specified in `req`
-pub fn nanosleep(req: &TimeSpec, rem: &mut TimeSpec) -> Result<usize> {
-    unsafe {
-        syscall2(
-            SYS_NANOSLEEP,
-            req as *const TimeSpec as usize,
-            rem as *mut TimeSpec as usize,
-        )
-    }
-}
-
-/// Open a file at a specific path
-pub fn openat<T: AsRef<str>>(
-    fd: usize,
-    path: T,
-    flags: usize,
-    fcntl_flags: usize,
-) -> Result<usize> {
-    let path = path.as_ref();
-    unsafe {
-        syscall5(
-            SYS_OPENAT,
-            fd,
-            path.as_ptr() as usize,
-            path.len(),
-            flags,
-            fcntl_flags,
-        )
-    }
-}
-/// Open a file at a specific path with filter
-pub fn openat_with_filter<T: AsRef<str>>(
-    fd: usize,
-    path: T,
-    flags: usize,
-    fcntl_flags: usize,
-    euid: u32,
-    egid: u32,
-) -> Result<usize> {
-    let path = path.as_ref();
-    unsafe {
-        syscall6(
-            SYS_OPENAT_WITH_FILTER,
-            fd,
-            path.as_ptr() as usize,
-            path.len(),
-            flags | fcntl_flags,
-            // NOTE: Short-term solution to allow namespace management.
-            // In the long term, we need to figure out how we should best handle
-            // Unix permissions using capabilities.
-            euid as usize,
-            egid as usize,
-        )
-    }
-}
-
-/// Remove a file at at specific path
-pub fn unlinkat<T: AsRef<str>>(fd: usize, path: T, flags: usize) -> Result<usize> {
-    let path = path.as_ref();
-    unsafe { syscall4(SYS_UNLINKAT, fd, path.as_ptr() as usize, path.len(), flags) }
-}
-/// Remove a file at at specific path with filter
-pub fn unlinkat_with_filter<T: AsRef<str>>(
-    fd: usize,
-    path: T,
-    flags: usize,
-    euid: u32,
-    egid: u32,
-) -> Result<usize> {
-    let path = path.as_ref();
-    unsafe {
-        syscall6(
-            SYS_UNLINKAT_WITH_FILTER,
-            fd,
-            path.as_ptr() as usize,
-            path.len(),
-            flags,
-            // NOTE: Short-term solution to allow namespace management.
-            // In the long term, we need to figure out how we should best handle
-            // Unix permissions using capabilities.
-            euid as usize,
-            egid as usize,
-        )
-    }
-}
-
-/// Read from a file descriptor into a buffer
-pub fn read(fd: usize, buf: &mut [u8]) -> Result<usize> {
-    unsafe { syscall3(SYS_READ, fd, buf.as_mut_ptr() as usize, buf.len()) }
-}
-
-/// Write a buffer to a file descriptor
-///
-/// The kernel will attempt to write the bytes in `buf` to the file descriptor `fd`, returning
-/// either an `Err`, explained below, or `Ok(count)` where `count` is the number of bytes which
-/// were written.
-///
-/// # Errors
-///
-/// * `EAGAIN` - the file descriptor was opened with `O_NONBLOCK` and writing would block
-/// * `EBADF` - the file descriptor is not valid or is not open for writing
-/// * `EFAULT` - `buf` does not point to the process's addressible memory
-/// * `EIO` - an I/O error occurred
-/// * `ENOSPC` - the device containing the file descriptor has no room for data
-/// * `EPIPE` - the file descriptor refers to a pipe or socket whose reading end is closed
-pub fn write(fd: usize, buf: &[u8]) -> Result<usize> {
-    unsafe { syscall3(SYS_WRITE, fd, buf.as_ptr() as usize, buf.len()) }
-}
-
-/// Yield the process's time slice to the kernel
-///
-/// This function will return Ok(0) on success
-pub fn sched_yield() -> Result<usize> {
-    unsafe { syscall0(SYS_YIELD) }
-}
-
-/// Send a file descriptor `fd`, handled by the scheme providing `receiver_socket`. `flags` is
-/// currently unused (must be zero), and `arg` is included in the scheme call.
-///
-/// The scheme can return an arbitrary value.
-pub fn sendfd(receiver_socket: usize, fd: usize, flags: usize, arg: u64) -> Result<usize> {
-    #[cfg(target_pointer_width = "32")]
-    unsafe {
-        syscall5(
-            SYS_SENDFD,
-            receiver_socket,
-            fd,
-            flags,
-            arg as u32 as usize,
-            (arg >> 32) as u32 as usize,
-        )
-    }
-
-    #[cfg(target_pointer_width = "64")]
-    unsafe {
-        syscall4(SYS_SENDFD, receiver_socket, fd, flags, arg as usize)
-    }
-}
-
-pub trait Call {
-    unsafe fn raw_call(
-        &self,
-        payload_ptr: *const u8,
-        len: usize,
-        flags: CallFlags,
-        metadata: &[u64],
-    ) -> Result<usize>;
-}
-
-impl Call for usize {
-    unsafe fn raw_call(
-        &self,
-        payload_ptr: *const u8,
-        len: usize,
-        flags: CallFlags,
-        metadata: &[u64],
-    ) -> Result<usize> {
-        unsafe {
-            syscall5(
-                SYS_CALL,
-                *self,
-                payload_ptr as usize,
-                len,
-                metadata.len() | flags.bits(),
-                metadata.as_ptr() as usize,
-            )
-        }
-    }
-}
-
-impl Call for &[usize] {
-    unsafe fn raw_call(
-        &self,
-        payload_ptr: *const u8,
-        len: usize,
-        flags: CallFlags,
-        metadata: &[u64],
-    ) -> Result<usize> {
-        let combined_flags = flags | CallFlags::MULTIPLE_FDS;
-        unsafe {
-            syscall6(
-                SYS_CALL,
-                self.as_ptr() as usize,
-                payload_ptr as usize,
-                len,
-                metadata.len() | combined_flags.bits(),
-                metadata.as_ptr() as usize,
-                self.len() * mem::size_of::<usize>(),
-            )
-        }
-    }
-}
-
-/// SYS_CALL interface, read-only variant
-pub fn call_ro<T: Call>(
-    fd: T,
-    payload: &mut [u8],
-    flags: CallFlags,
-    metadata: &[u64],
-) -> Result<usize> {
-    unsafe {
-        fd.raw_call(
-            payload.as_mut_ptr(),
-            payload.len(),
-            flags | CallFlags::READ,
-            metadata,
-        )
-    }
-}
-/// SYS_CALL interface, write-only variant
-pub fn call_wo<T: Call>(
-    fd: T,
-    payload: &[u8],
-    flags: CallFlags,
-    metadata: &[u64],
-) -> Result<usize> {
-    unsafe {
-        fd.raw_call(
-            payload.as_ptr(),
-            payload.len(),
-            flags | CallFlags::WRITE,
-            metadata,
-        )
-    }
-}
-/// SYS_CALL interface, read-write variant
-pub fn call_rw<T: Call>(
-    fd: T,
-    payload: &mut [u8],
-    flags: CallFlags,
-    metadata: &[u64],
-) -> Result<usize> {
-    unsafe {
-        fd.raw_call(
-            payload.as_mut_ptr(),
-            payload.len(),
-            flags | CallFlags::READ | CallFlags::WRITE,
-            metadata,
-        )
-    }
-}
-
-pub fn std_fs_call<T: Call>(fd: T, payload: &mut [u8], metadata: &StdFsCallMeta) -> Result<usize> {
-    call_rw(fd, payload, CallFlags::STD_FS, metadata)
-}

src/data.rs

@@ -1,501 +0,0 @@
-use core::{
-    mem,
-    ops::{Deref, DerefMut},
-    slice,
-};
-
-use crate::flag::{EventFlags, MapFlags, PtraceFlags, StdFsCallKind};
-
-#[derive(Copy, Clone, Debug, Default)]
-#[repr(C)]
-pub struct Event {
-    pub id: usize,
-    pub flags: EventFlags,
-    pub data: usize,
-}
-
-impl Deref for Event {
-    type Target = [u8];
-    fn deref(&self) -> &[u8] {
-        unsafe { slice::from_raw_parts(self as *const Event as *const u8, mem::size_of::<Event>()) }
-    }
-}
-
-impl DerefMut for Event {
-    fn deref_mut(&mut self) -> &mut [u8] {
-        unsafe { slice::from_raw_parts_mut(self as *mut Event as *mut u8, mem::size_of::<Event>()) }
-    }
-}
-
-#[derive(Copy, Clone, Debug, Default)]
-#[repr(C)]
-pub struct ITimerSpec {
-    pub it_interval: TimeSpec,
-    pub it_value: TimeSpec,
-}
-
-impl Deref for ITimerSpec {
-    type Target = [u8];
-    fn deref(&self) -> &[u8] {
-        unsafe {
-            slice::from_raw_parts(
-                self as *const ITimerSpec as *const u8,
-                mem::size_of::<ITimerSpec>(),
-            )
-        }
-    }
-}
-
-impl DerefMut for ITimerSpec {
-    fn deref_mut(&mut self) -> &mut [u8] {
-        unsafe {
-            slice::from_raw_parts_mut(
-                self as *mut ITimerSpec as *mut u8,
-                mem::size_of::<ITimerSpec>(),
-            )
-        }
-    }
-}
-
-#[derive(Copy, Clone, Debug, Default)]
-#[repr(C)]
-pub struct OldMap {
-    pub offset: usize,
-    pub size: usize,
-    pub flags: MapFlags,
-}
-
-impl Deref for OldMap {
-    type Target = [u8];
-    fn deref(&self) -> &[u8] {
-        unsafe {
-            slice::from_raw_parts(self as *const OldMap as *const u8, mem::size_of::<OldMap>())
-        }
-    }
-}
-
-impl DerefMut for OldMap {
-    fn deref_mut(&mut self) -> &mut [u8] {
-        unsafe {
-            slice::from_raw_parts_mut(self as *mut OldMap as *mut u8, mem::size_of::<OldMap>())
-        }
-    }
-}
-#[derive(Copy, Clone, Debug, Default)]
-#[repr(C)]
-pub struct Map {
-    /// The offset inside the file that is being mapped.
-    pub offset: usize,
-
-    /// The size of the memory map.
-    pub size: usize,
-
-    /// Contains both prot and map flags.
-    pub flags: MapFlags,
-
-    /// Functions as a hint to where in the virtual address space of the running process, to place
-    /// the memory map. If [`MapFlags::MAP_FIXED`] is set, then this address must be the address to
-    /// map to.
-    pub address: usize,
-}
-
-impl Deref for Map {
-    type Target = [u8];
-    fn deref(&self) -> &[u8] {
-        unsafe { slice::from_raw_parts(self as *const Map as *const u8, mem::size_of::<Map>()) }
-    }
-}
-
-impl DerefMut for Map {
-    fn deref_mut(&mut self) -> &mut [u8] {
-        unsafe { slice::from_raw_parts_mut(self as *mut Map as *mut u8, mem::size_of::<Map>()) }
-    }
-}
-
-#[derive(Copy, Clone, Debug, Default, PartialEq)]
-#[repr(C)]
-pub struct Stat {
-    pub st_dev: u64,
-    pub st_ino: u64,
-    pub st_mode: u16,
-    pub st_nlink: u32,
-    pub st_uid: u32,
-    pub st_gid: u32,
-    pub st_size: u64,
-    pub st_blksize: u32,
-    pub st_blocks: u64,
-    pub st_mtime: u64,
-    pub st_mtime_nsec: u32,
-    pub st_atime: u64,
-    pub st_atime_nsec: u32,
-    pub st_ctime: u64,
-    pub st_ctime_nsec: u32,
-}
-
-impl Deref for Stat {
-    type Target = [u8];
-    fn deref(&self) -> &[u8] {
-        unsafe { slice::from_raw_parts(self as *const Stat as *const u8, mem::size_of::<Stat>()) }
-    }
-}
-
-impl DerefMut for Stat {
-    fn deref_mut(&mut self) -> &mut [u8] {
-        unsafe { slice::from_raw_parts_mut(self as *mut Stat as *mut u8, mem::size_of::<Stat>()) }
-    }
-}
-
-#[derive(Copy, Clone, Debug, Default, PartialEq)]
-#[repr(C)]
-pub struct StatVfs {
-    pub f_bsize: u32,
-    pub f_blocks: u64,
-    pub f_bfree: u64,
-    pub f_bavail: u64,
-}
-
-impl Deref for StatVfs {
-    type Target = [u8];
-    fn deref(&self) -> &[u8] {
-        unsafe {
-            slice::from_raw_parts(
-                self as *const StatVfs as *const u8,
-                mem::size_of::<StatVfs>(),
-            )
-        }
-    }
-}
-
-impl DerefMut for StatVfs {
-    fn deref_mut(&mut self) -> &mut [u8] {
-        unsafe {
-            slice::from_raw_parts_mut(self as *mut StatVfs as *mut u8, mem::size_of::<StatVfs>())
-        }
-    }
-}
-
-#[derive(Copy, Clone, Debug, Default, PartialEq)]
-#[repr(C, packed)]
-pub struct StdFsCallMeta {
-    pub kind: u8, // enum StdFsCallKind
-    _rsvd: [u8; 7],
-    pub arg1: u64,
-    pub arg2: u64,
-}
-
-impl StdFsCallMeta {
-    pub fn new(kind: StdFsCallKind, arg1: u64, arg2: u64) -> Self {
-        Self {
-            kind: kind as u8,
-            _rsvd: [0; 7],
-            arg1,
-            arg2,
-        }
-    }
-}
-
-impl Deref for StdFsCallMeta {
-    type Target = [u64];
-    fn deref(&self) -> &[u64] {
-        unsafe {
-            slice::from_raw_parts(
-                self as *const StdFsCallMeta as *const u64,
-                mem::size_of::<StdFsCallMeta>() / mem::size_of::<u64>(),
-            )
-        }
-    }
-}
-
-impl DerefMut for StdFsCallMeta {
-    fn deref_mut(&mut self) -> &mut [u64] {
-        unsafe {
-            slice::from_raw_parts_mut(
-                self as *mut StdFsCallMeta as *mut u64,
-                mem::size_of::<StdFsCallMeta>() / mem::size_of::<u64>(),
-            )
-        }
-    }
-}
-
-#[derive(Copy, Clone, Debug, Default, PartialEq)]
-#[repr(C)]
-pub struct TimeSpec {
-    pub tv_sec: i64,
-    pub tv_nsec: i32,
-}
-
-const NANOS_PER_SEC: u128 = 1_000_000_000;
-
-impl TimeSpec {
-    pub fn from_nanos(nanos: u128) -> Self {
-        Self {
-            tv_sec: i64::try_from(nanos / NANOS_PER_SEC).unwrap_or(i64::MAX),
-            tv_nsec: (nanos % NANOS_PER_SEC) as i32, // guaranteed to never overflow
-        }
-    }
-    pub fn to_nanos(&self) -> u128 {
-        self.tv_sec as u128 * NANOS_PER_SEC + self.tv_nsec as u128
-    }
-}
-
-impl Deref for TimeSpec {
-    type Target = [u8];
-    fn deref(&self) -> &[u8] {
-        unsafe {
-            slice::from_raw_parts(
-                self as *const TimeSpec as *const u8,
-                mem::size_of::<TimeSpec>(),
-            )
-        }
-    }
-}
-
-impl DerefMut for TimeSpec {
-    fn deref_mut(&mut self) -> &mut [u8] {
-        unsafe {
-            slice::from_raw_parts_mut(self as *mut TimeSpec as *mut u8, mem::size_of::<TimeSpec>())
-        }
-    }
-}
-
-#[derive(Clone, Copy, Debug, Default)]
-#[repr(C)]
-pub struct PtraceEvent {
-    pub cause: PtraceFlags,
-    pub a: usize,
-    pub b: usize,
-    pub c: usize,
-    pub d: usize,
-    pub e: usize,
-    pub f: usize,
-}
-
-impl Deref for PtraceEvent {
-    type Target = [u8];
-    fn deref(&self) -> &[u8] {
-        unsafe {
-            slice::from_raw_parts(
-                self as *const PtraceEvent as *const u8,
-                mem::size_of::<PtraceEvent>(),
-            )
-        }
-    }
-}
-
-impl DerefMut for PtraceEvent {
-    fn deref_mut(&mut self) -> &mut [u8] {
-        unsafe {
-            slice::from_raw_parts_mut(
-                self as *mut PtraceEvent as *mut u8,
-                mem::size_of::<PtraceEvent>(),
-            )
-        }
-    }
-}
-
-#[macro_export]
-macro_rules! ptrace_event {
-    ($cause:expr $(, $a:expr $(, $b:expr $(, $c:expr)?)?)?) => {
-        $crate::data::PtraceEvent {
-            cause: $cause,
-            $(a: $a,
-              $(b: $b,
-                $(c: $c,)?
-              )?
-            )?
-            ..Default::default()
-        }
-    }
-}
-
-bitflags::bitflags! {
-    #[derive(PartialEq, Eq, PartialOrd, Ord, Hash, Debug, Clone, Copy, Default)]
-    pub struct GrantFlags: usize {
-        const GRANT_READ = 0x0000_0001;
-        const GRANT_WRITE = 0x0000_0002;
-        const GRANT_EXEC = 0x0000_0004;
-
-        const GRANT_SHARED = 0x0000_0008;
-        const GRANT_LAZY = 0x0000_0010;
-        const GRANT_SCHEME = 0x0000_0020;
-        const GRANT_PHYS = 0x0000_0040;
-        const GRANT_PINNED = 0x0000_0080;
-        const GRANT_PHYS_CONTIGUOUS = 0x0000_0100;
-    }
-}
-
-impl GrantFlags {
-    #[deprecated = "use the safe `from_bits_retain` method instead"]
-    pub unsafe fn from_bits_unchecked(bits: usize) -> Self {
-        Self::from_bits_retain(bits)
-    }
-}
-
-#[derive(Clone, Copy, Debug, Default)]
-#[repr(C)]
-pub struct GrantDesc {
-    pub base: usize,
-    pub size: usize,
-    pub flags: GrantFlags,
-    pub offset: u64,
-}
-
-impl Deref for GrantDesc {
-    type Target = [u8];
-    fn deref(&self) -> &[u8] {
-        unsafe {
-            slice::from_raw_parts(
-                self as *const GrantDesc as *const u8,
-                mem::size_of::<GrantDesc>(),
-            )
-        }
-    }
-}
-
-impl DerefMut for GrantDesc {
-    fn deref_mut(&mut self) -> &mut [u8] {
-        unsafe {
-            slice::from_raw_parts_mut(
-                self as *mut GrantDesc as *mut u8,
-                mem::size_of::<GrantDesc>(),
-            )
-        }
-    }
-}
-
-#[derive(Clone, Copy, Debug, Default)]
-#[repr(C)]
-pub struct SetSighandlerData {
-    pub user_handler: usize,
-    pub excp_handler: usize,
-    pub thread_control_addr: usize,
-    pub proc_control_addr: usize,
-}
-
-impl Deref for SetSighandlerData {
-    type Target = [u8];
-    fn deref(&self) -> &[u8] {
-        unsafe { slice::from_raw_parts(self as *const Self as *const u8, mem::size_of::<Self>()) }
-    }
-}
-
-impl DerefMut for SetSighandlerData {
-    fn deref_mut(&mut self) -> &mut [u8] {
-        unsafe { slice::from_raw_parts_mut(self as *mut Self as *mut u8, mem::size_of::<Self>()) }
-    }
-}
-pub use crate::sigabi::*;
-
-/// UNSTABLE
-#[derive(Copy, Clone, Debug, Default, PartialEq)]
-#[repr(C)]
-pub struct ProcSchemeAttrs {
-    pub pid: u32,
-    pub euid: u32,
-    pub egid: u32,
-    pub prio: u32,
-    pub debug_name: [u8; 32],
-}
-impl Deref for ProcSchemeAttrs {
-    type Target = [u8];
-    fn deref(&self) -> &[u8] {
-        unsafe { slice::from_raw_parts(self as *const Self as *const u8, mem::size_of::<Self>()) }
-    }
-}
-impl DerefMut for ProcSchemeAttrs {
-    fn deref_mut(&mut self) -> &mut [u8] {
-        unsafe {
-            slice::from_raw_parts_mut(
-                self as *mut ProcSchemeAttrs as *mut u8,
-                mem::size_of::<ProcSchemeAttrs>(),
-            )
-        }
-    }
-}
-#[derive(Copy, Clone, Debug, Default)]
-#[repr(C)]
-pub struct CtxtStsBuf {
-    pub status: usize,
-    pub excp: crate::Exception,
-}
-impl Deref for CtxtStsBuf {
-    type Target = [u8];
-    fn deref(&self) -> &[u8] {
-        unsafe { slice::from_raw_parts(self as *const Self as *const u8, mem::size_of::<Self>()) }
-    }
-}
-impl DerefMut for CtxtStsBuf {
-    fn deref_mut(&mut self) -> &mut [u8] {
-        unsafe {
-            slice::from_raw_parts_mut(
-                self as *mut CtxtStsBuf as *mut u8,
-                mem::size_of::<CtxtStsBuf>(),
-            )
-        }
-    }
-}
-
-#[derive(Copy, Clone, Debug, Default)]
-#[repr(C)]
-pub struct NewFdParams {
-    pub offset: u64,
-    pub number: usize,
-    pub flags: usize,
-    pub internal_flags: u8,
-}
-
-#[repr(u8)]
-#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord)]
-pub enum GlobalSchemes {
-    Debug = 1,
-    Event = 2,
-    Memory = 3,
-    Pipe = 4,
-    Serio = 5,
-    Irq = 6,
-    Time = 7,
-    Sys = 8,
-    Proc = 9,
-    Acpi = 10,
-    Dtb = 11,
-}
-impl GlobalSchemes {
-    pub fn try_from_raw(raw: u8) -> Option<Self> {
-        match raw {
-            1 => Some(Self::Debug),
-            2 => Some(Self::Event),
-            3 => Some(Self::Memory),
-            4 => Some(Self::Pipe),
-            5 => Some(Self::Serio),
-            6 => Some(Self::Irq),
-            7 => Some(Self::Time),
-            8 => Some(Self::Sys),
-            9 => Some(Self::Proc),
-            10 => Some(Self::Acpi),
-            11 => Some(Self::Dtb),
-            _ => None,
-        }
-    }
-    pub fn as_str(&self) -> &'static str {
-        match self {
-            Self::Debug => "debug",
-            Self::Event => "event",
-            Self::Memory => "memory",
-            Self::Pipe => "pipe",
-            Self::Serio => "serio",
-            Self::Irq => "irq",
-            Self::Time => "time",
-            Self::Sys => "sys",
-            Self::Proc => "kernel.proc",
-            Self::Acpi => "kernel.acpi",
-            Self::Dtb => "kernel.dtb",
-        }
-    }
-}
-
-#[repr(C)]
-#[derive(Debug, Clone, Copy, Default)]
-pub struct KernelSchemeInfo {
-    pub scheme_id: u8,
-    pub fd: usize,
-}

src/dirent.rs

@@ -1,231 +0,0 @@
-use core::{
-    mem::size_of,
-    ops::{Deref, DerefMut},
-    slice,
-};
-
-use crate::{
-    error::{Error, Result, EINVAL},
-    ENAMETOOLONG,
-};
-
-#[derive(Clone, Copy, Debug, Default)]
-#[repr(packed)]
-pub struct DirentHeader {
-    pub inode: u64,
-    /// A filesystem-specific opaque value used to uniquely identify directory entries. This value,
-    /// in the last returned entry from a SYS_GETDENTS invocation, shall be passed to the next
-    /// call.
-    pub next_opaque_id: u64,
-    // This struct intentionally does not include a "next" offset field, unlike Linux, to easily
-    // guarantee the iterator will be reasonably deterministic, even if the scheme is adversarial.
-    pub record_len: u16,
-    /// A `DirentKind`.
-    ///
-    /// May not be directly available (Unspecified), and if so needs to be looked using fstat.
-    pub kind: u8,
-}
-
-impl Deref for DirentHeader {
-    type Target = [u8];
-    fn deref(&self) -> &[u8] {
-        unsafe { slice::from_raw_parts(self as *const Self as *const u8, size_of::<Self>()) }
-    }
-}
-
-impl DerefMut for DirentHeader {
-    fn deref_mut(&mut self) -> &mut [u8] {
-        unsafe { slice::from_raw_parts_mut(self as *mut Self as *mut u8, size_of::<Self>()) }
-    }
-}
-
-// Note: Must match relibc/include/bits/dirent.h
-#[derive(Clone, Copy, Debug, Default)]
-#[repr(u8)]
-pub enum DirentKind {
-    #[default]
-    Unspecified = 0,
-
-    CharDev = 2,
-    Directory = 4,
-    BlockDev = 6,
-    Regular = 8,
-    Symlink = 10,
-    Socket = 12,
-}
-
-impl DirentKind {
-    // TODO: derive(FromPrimitive)
-    pub fn try_from_raw(raw: u8) -> Option<Self> {
-        Some(match raw {
-            0 => Self::Unspecified,
-
-            2 => Self::CharDev,
-            4 => Self::Directory,
-            6 => Self::BlockDev,
-            8 => Self::Regular,
-            10 => Self::Symlink,
-            12 => Self::Socket,
-
-            _ => return None,
-        })
-    }
-}
-
-pub struct DirentIter<'a>(&'a [u8]);
-
-impl<'a> DirentIter<'a> {
-    pub const fn new(buffer: &'a [u8]) -> Self {
-        Self(buffer)
-    }
-}
-#[derive(Debug)]
-pub struct Invalid;
-
-impl<'a> Iterator for DirentIter<'a> {
-    type Item = Result<(&'a DirentHeader, &'a [u8]), Invalid>;
-
-    fn next(&mut self) -> Option<Self::Item> {
-        if self.0.len() < size_of::<DirentHeader>() {
-            return None;
-        }
-        let header = unsafe { &*(self.0.as_ptr().cast::<DirentHeader>()) };
-        if self.0.len() < usize::from(header.record_len) {
-            return Some(Err(Invalid));
-        }
-        let (this, remaining) = self.0.split_at(usize::from(header.record_len));
-        self.0 = remaining;
-
-        let name_and_nul = &this[size_of::<DirentHeader>()..];
-        let name = &name_and_nul[..name_and_nul.len() - 1];
-
-        Some(Ok((header, name)))
-    }
-}
-
-#[derive(Debug)]
-pub struct DirentBuf<B> {
-    buffer: B,
-
-    // Exists in order to allow future extensions to the DirentHeader struct.
-
-    // TODO: Might add an upper bound to protect against cache miss DoS. The kernel currently
-    // forbids any other value than size_of::<DirentHeader>().
-    header_size: u16,
-
-    written: usize,
-}
-/// Abstraction between &mut [u8] and the kernel's UserSliceWo.
-pub trait Buffer<'a>: Sized + 'a {
-    fn empty() -> Self;
-    fn length(&self) -> usize;
-
-    /// Split all of `self` into two disjoint contiguous subbuffers of lengths `index` and `length
-    /// - index` respectively.
-    ///
-    /// Returns None if and only if `index > length`.
-    fn split_at(self, index: usize) -> Option<[Self; 2]>;
-
-    /// Copy from `src`, lengths must match exactly.
-    ///
-    /// Allowed to overwrite subsequent buffer space, for performance reasons. Can be changed in
-    /// the future if too restrictive.
-    fn copy_from_slice_exact(self, src: &[u8]) -> Result<()>;
-
-    /// Write zeroes to this part of the buffer.
-    ///
-    /// Allowed to overwrite subsequent buffer space, for performance reasons. Can be changed in
-    /// the future if too restrictive.
-    fn zero_out(self) -> Result<()>;
-}
-impl<'a> Buffer<'a> for &'a mut [u8] {
-    fn empty() -> Self {
-        &mut []
-    }
-    fn length(&self) -> usize {
-        self.len()
-    }
-
-    fn split_at(self, index: usize) -> Option<[Self; 2]> {
-        self.split_at_mut_checked(index).map(|(a, b)| [a, b])
-    }
-    fn copy_from_slice_exact(self, src: &[u8]) -> Result<()> {
-        self.copy_from_slice(src);
-        Ok(())
-    }
-    fn zero_out(self) -> Result<()> {
-        self.fill(0);
-        Ok(())
-    }
-}
-
-pub struct DirEntry<'name> {
-    pub inode: u64,
-    pub next_opaque_id: u64,
-    pub name: &'name str,
-    pub kind: DirentKind,
-}
-
-impl<'a, B: Buffer<'a>> DirentBuf<B> {
-    pub fn new(buffer: B, header_size: u16) -> Option<Self> {
-        if usize::from(header_size) < size_of::<DirentHeader>() {
-            return None;
-        }
-
-        Some(Self {
-            buffer,
-            header_size,
-            written: 0,
-        })
-    }
-    pub fn entry(&mut self, entry: DirEntry<'_>) -> Result<()> {
-        let name16 = u16::try_from(entry.name.len()).map_err(|_| Error::new(EINVAL))?;
-        let record_align = align_of::<*const DirentHeader>();
-        let record_len = self
-            .header_size
-            .checked_add(name16)
-            // XXX: NUL byte. Unfortunately this is probably the only performant way to be
-            // compatible with C.
-            .and_then(|l| l.checked_add(1))
-            // Align length so next header is aligned
-            .and_then(|l| l.checked_next_multiple_of(record_align as u16))
-            .ok_or(Error::new(ENAMETOOLONG))?;
-
-        let [this, remaining] = core::mem::replace(&mut self.buffer, B::empty())
-            .split_at(usize::from(record_len))
-            .ok_or(Error::new(EINVAL))?;
-
-        let [this_header_variable, this_name_and_nul] = this
-            .split_at(usize::from(self.header_size))
-            .expect("already know header_size + ... >= header_size");
-
-        let [this_name, this_name_nul] = this_name_and_nul
-            .split_at(usize::from(name16))
-            .expect("already know name.len() <= name.len() + 1");
-
-        // Every write here is currently sequential, allowing the buffer trait to do optimizations
-        // where subbuffer writes are out-of-bounds (but inside the total buffer).
-
-        let [this_header, this_header_extra] = this_header_variable
-            .split_at(size_of::<DirentHeader>())
-            .expect("already checked header_size <= size_of Header");
-
-        this_header.copy_from_slice_exact(&DirentHeader {
-            record_len,
-            next_opaque_id: entry.next_opaque_id,
-            inode: entry.inode,
-            kind: entry.kind as u8,
-        })?;
-        this_header_extra.zero_out()?;
-        this_name.copy_from_slice_exact(entry.name.as_bytes())?;
-        this_name_nul.zero_out()?;
-
-        self.written += usize::from(record_len);
-        self.buffer = remaining;
-
-        Ok(())
-    }
-    pub fn finalize(self) -> usize {
-        self.written
-    }
-}

src/error.rs

@@ -1,327 +0,0 @@
-use core::{fmt, result};
-
-#[derive(Clone, Copy, Eq, PartialEq)]
-pub struct Error {
-    pub errno: i32,
-}
-
-pub type Result<T, E = Error> = result::Result<T, E>;
-
-impl Error {
-    pub fn new(errno: i32) -> Error {
-        Error { errno }
-    }
-
-    pub fn mux(result: Result<usize>) -> usize {
-        match result {
-            Ok(value) => value,
-            Err(error) => -error.errno as usize,
-        }
-    }
-
-    pub fn demux(value: usize) -> Result<usize> {
-        let errno = -(value as i32);
-        if errno >= 1 && errno < STR_ERROR.len() as i32 {
-            Err(Error::new(errno))
-        } else {
-            Ok(value)
-        }
-    }
-
-    pub fn text(&self) -> &'static str {
-        STR_ERROR
-            .get(self.errno as usize)
-            .map(|&x| x)
-            .unwrap_or("Unknown Error")
-    }
-}
-
-impl fmt::Debug for Error {
-    fn fmt(&self, f: &mut fmt::Formatter) -> result::Result<(), fmt::Error> {
-        f.write_str(self.text())
-    }
-}
-
-impl fmt::Display for Error {
-    fn fmt(&self, f: &mut fmt::Formatter) -> result::Result<(), fmt::Error> {
-        f.write_str(self.text())
-    }
-}
-#[cfg(feature = "std")]
-impl std::error::Error for Error {}
-
-#[cfg(feature = "std")]
-impl From<Error> for std::io::Error {
-    fn from(value: Error) -> Self {
-        std::io::Error::from_raw_os_error(value.errno)
-    }
-}
-
-pub const EPERM: i32 = 1; /* Operation not permitted */
-pub const ENOENT: i32 = 2; /* No such file or directory */
-pub const ESRCH: i32 = 3; /* No such process */
-pub const EINTR: i32 = 4; /* Interrupted system call */
-pub const EIO: i32 = 5; /* I/O error */
-pub const ENXIO: i32 = 6; /* No such device or address */
-pub const E2BIG: i32 = 7; /* Argument list too long */
-pub const ENOEXEC: i32 = 8; /* Exec format error */
-pub const EBADF: i32 = 9; /* Bad file number */
-pub const ECHILD: i32 = 10; /* No child processes */
-pub const EAGAIN: i32 = 11; /* Try again */
-pub const ENOMEM: i32 = 12; /* Out of memory */
-pub const EACCES: i32 = 13; /* Permission denied */
-pub const EFAULT: i32 = 14; /* Bad address */
-pub const ENOTBLK: i32 = 15; /* Block device required */
-pub const EBUSY: i32 = 16; /* Device or resource busy */
-pub const EEXIST: i32 = 17; /* File exists */
-pub const EXDEV: i32 = 18; /* Cross-device link */
-pub const ENODEV: i32 = 19; /* No such device */
-pub const ENOTDIR: i32 = 20; /* Not a directory */
-pub const EISDIR: i32 = 21; /* Is a directory */
-pub const EINVAL: i32 = 22; /* Invalid argument */
-pub const ENFILE: i32 = 23; /* File table overflow */
-pub const EMFILE: i32 = 24; /* Too many open files */
-pub const ENOTTY: i32 = 25; /* Not a typewriter */
-pub const ETXTBSY: i32 = 26; /* Text file busy */
-pub const EFBIG: i32 = 27; /* File too large */
-pub const ENOSPC: i32 = 28; /* No space left on device */
-pub const ESPIPE: i32 = 29; /* Illegal seek */
-pub const EROFS: i32 = 30; /* Read-only file system */
-pub const EMLINK: i32 = 31; /* Too many links */
-pub const EPIPE: i32 = 32; /* Broken pipe */
-pub const EDOM: i32 = 33; /* Math argument out of domain of func */
-pub const ERANGE: i32 = 34; /* Math result not representable */
-pub const EDEADLK: i32 = 35; /* Resource deadlock would occur */
-pub const ENAMETOOLONG: i32 = 36; /* File name too long */
-pub const ENOLCK: i32 = 37; /* No record locks available */
-pub const ENOSYS: i32 = 38; /* Function not implemented */
-pub const ENOTEMPTY: i32 = 39; /* Directory not empty */
-pub const ELOOP: i32 = 40; /* Too many symbolic links encountered */
-pub const EWOULDBLOCK: i32 = 41; /* Operation would block */
-pub const ENOMSG: i32 = 42; /* No message of desired type */
-pub const EIDRM: i32 = 43; /* Identifier removed */
-pub const ECHRNG: i32 = 44; /* Channel number out of range */
-pub const EL2NSYNC: i32 = 45; /* Level 2 not synchronized */
-pub const EL3HLT: i32 = 46; /* Level 3 halted */
-pub const EL3RST: i32 = 47; /* Level 3 reset */
-pub const ELNRNG: i32 = 48; /* Link number out of range */
-pub const EUNATCH: i32 = 49; /* Protocol driver not attached */
-pub const ENOCSI: i32 = 50; /* No CSI structure available */
-pub const EL2HLT: i32 = 51; /* Level 2 halted */
-pub const EBADE: i32 = 52; /* Invalid exchange */
-pub const EBADR: i32 = 53; /* Invalid request descriptor */
-pub const EXFULL: i32 = 54; /* Exchange full */
-pub const ENOANO: i32 = 55; /* No anode */
-pub const EBADRQC: i32 = 56; /* Invalid request code */
-pub const EBADSLT: i32 = 57; /* Invalid slot */
-pub const EDEADLOCK: i32 = 58; /* Resource deadlock would occur */
-pub const EBFONT: i32 = 59; /* Bad font file format */
-pub const ENOSTR: i32 = 60; /* Device not a stream */
-pub const ENODATA: i32 = 61; /* No data available */
-pub const ETIME: i32 = 62; /* Timer expired */
-pub const ENOSR: i32 = 63; /* Out of streams resources */
-pub const ENONET: i32 = 64; /* Machine is not on the network */
-pub const ENOPKG: i32 = 65; /* Package not installed */
-pub const EREMOTE: i32 = 66; /* Object is remote */
-pub const ENOLINK: i32 = 67; /* Link has been severed */
-pub const EADV: i32 = 68; /* Advertise error */
-pub const ESRMNT: i32 = 69; /* Srmount error */
-pub const ECOMM: i32 = 70; /* Communication error on send */
-pub const EPROTO: i32 = 71; /* Protocol error */
-pub const EMULTIHOP: i32 = 72; /* Multihop attempted */
-pub const EDOTDOT: i32 = 73; /* RFS specific error */
-pub const EBADMSG: i32 = 74; /* Not a data message */
-pub const EOVERFLOW: i32 = 75; /* Value too large for defined data type */
-pub const ENOTUNIQ: i32 = 76; /* Name not unique on network */
-pub const EBADFD: i32 = 77; /* File descriptor in bad state */
-pub const EREMCHG: i32 = 78; /* Remote address changed */
-pub const ELIBACC: i32 = 79; /* Can not access a needed shared library */
-pub const ELIBBAD: i32 = 80; /* Accessing a corrupted shared library */
-pub const ELIBSCN: i32 = 81; /* .lib section in a.out corrupted */
-pub const ELIBMAX: i32 = 82; /* Attempting to link in too many shared libraries */
-pub const ELIBEXEC: i32 = 83; /* Cannot exec a shared library directly */
-pub const EILSEQ: i32 = 84; /* Illegal byte sequence */
-pub const ERESTART: i32 = 85; /* Interrupted system call should be restarted */
-pub const ESTRPIPE: i32 = 86; /* Streams pipe error */
-pub const EUSERS: i32 = 87; /* Too many users */
-pub const ENOTSOCK: i32 = 88; /* Socket operation on non-socket */
-pub const EDESTADDRREQ: i32 = 89; /* Destination address required */
-pub const EMSGSIZE: i32 = 90; /* Message too long */
-pub const EPROTOTYPE: i32 = 91; /* Protocol wrong type for socket */
-pub const ENOPROTOOPT: i32 = 92; /* Protocol not available */
-pub const EPROTONOSUPPORT: i32 = 93; /* Protocol not supported */
-pub const ESOCKTNOSUPPORT: i32 = 94; /* Socket type not supported */
-pub const EOPNOTSUPP: i32 = 95; /* Operation not supported on transport endpoint */
-pub const EPFNOSUPPORT: i32 = 96; /* Protocol family not supported */
-pub const EAFNOSUPPORT: i32 = 97; /* Address family not supported by protocol */
-pub const EADDRINUSE: i32 = 98; /* Address already in use */
-pub const EADDRNOTAVAIL: i32 = 99; /* Cannot assign requested address */
-pub const ENETDOWN: i32 = 100; /* Network is down */
-pub const ENETUNREACH: i32 = 101; /* Network is unreachable */
-pub const ENETRESET: i32 = 102; /* Network dropped connection because of reset */
-pub const ECONNABORTED: i32 = 103; /* Software caused connection abort */
-pub const ECONNRESET: i32 = 104; /* Connection reset by peer */
-pub const ENOBUFS: i32 = 105; /* No buffer space available */
-pub const EISCONN: i32 = 106; /* Transport endpoint is already connected */
-pub const ENOTCONN: i32 = 107; /* Transport endpoint is not connected */
-pub const ESHUTDOWN: i32 = 108; /* Cannot send after transport endpoint shutdown */
-pub const ETOOMANYREFS: i32 = 109; /* Too many references: cannot splice */
-pub const ETIMEDOUT: i32 = 110; /* Connection timed out */
-pub const ECONNREFUSED: i32 = 111; /* Connection refused */
-pub const EHOSTDOWN: i32 = 112; /* Host is down */
-pub const EHOSTUNREACH: i32 = 113; /* No route to host */
-pub const EALREADY: i32 = 114; /* Operation already in progress */
-pub const EINPROGRESS: i32 = 115; /* Operation now in progress */
-pub const ESTALE: i32 = 116; /* Stale NFS file handle */
-pub const EUCLEAN: i32 = 117; /* Structure needs cleaning */
-pub const ENOTNAM: i32 = 118; /* Not a XENIX named type file */
-pub const ENAVAIL: i32 = 119; /* No XENIX semaphores available */
-pub const EISNAM: i32 = 120; /* Is a named type file */
-pub const EREMOTEIO: i32 = 121; /* Remote I/O error */
-pub const EDQUOT: i32 = 122; /* Quota exceeded */
-pub const ENOMEDIUM: i32 = 123; /* No medium found */
-pub const EMEDIUMTYPE: i32 = 124; /* Wrong medium type */
-pub const ECANCELED: i32 = 125; /* Operation Canceled */
-pub const ENOKEY: i32 = 126; /* Required key not available */
-pub const EKEYEXPIRED: i32 = 127; /* Key has expired */
-pub const EKEYREVOKED: i32 = 128; /* Key has been revoked */
-pub const EKEYREJECTED: i32 = 129; /* Key was rejected by service */
-pub const EOWNERDEAD: i32 = 130; /* Owner died */
-pub const ENOTRECOVERABLE: i32 = 131; /* State not recoverable */
-pub const ERSVD: i32 = 132; /* Reserved (formerly "scheme-kernel message code") */
-
-pub static STR_ERROR: [&'static str; 133] = [
-    "Success",
-    "Operation not permitted",
-    "No such file or directory",
-    "No such process",
-    "Interrupted system call",
-    "I/O error",
-    "No such device or address",
-    "Argument list too long",
-    "Exec format error",
-    "Bad file number",
-    "No child processes",
-    "Try again",
-    "Out of memory",
-    "Permission denied",
-    "Bad address",
-    "Block device required",
-    "Device or resource busy",
-    "File exists",
-    "Cross-device link",
-    "No such device",
-    "Not a directory",
-    "Is a directory",
-    "Invalid argument",
-    "File table overflow",
-    "Too many open files",
-    "Not a typewriter",
-    "Text file busy",
-    "File too large",
-    "No space left on device",
-    "Illegal seek",
-    "Read-only file system",
-    "Too many links",
-    "Broken pipe",
-    "Math argument out of domain of func",
-    "Math result not representable",
-    "Resource deadlock would occur",
-    "File name too long",
-    "No record locks available",
-    "Function not implemented",
-    "Directory not empty",
-    "Too many symbolic links encountered",
-    "Operation would block",
-    "No message of desired type",
-    "Identifier removed",
-    "Channel number out of range",
-    "Level 2 not synchronized",
-    "Level 3 halted",
-    "Level 3 reset",
-    "Link number out of range",
-    "Protocol driver not attached",
-    "No CSI structure available",
-    "Level 2 halted",
-    "Invalid exchange",
-    "Invalid request descriptor",
-    "Exchange full",
-    "No anode",
-    "Invalid request code",
-    "Invalid slot",
-    "Resource deadlock would occur",
-    "Bad font file format",
-    "Device not a stream",
-    "No data available",
-    "Timer expired",
-    "Out of streams resources",
-    "Machine is not on the network",
-    "Package not installed",
-    "Object is remote",
-    "Link has been severed",
-    "Advertise error",
-    "Srmount error",
-    "Communication error on send",
-    "Protocol error",
-    "Multihop attempted",
-    "RFS specific error",
-    "Not a data message",
-    "Value too large for defined data type",
-    "Name not unique on network",
-    "File descriptor in bad state",
-    "Remote address changed",
-    "Can not access a needed shared library",
-    "Accessing a corrupted shared library",
-    ".lib section in a.out corrupted",
-    "Attempting to link in too many shared libraries",
-    "Cannot exec a shared library directly",
-    "Illegal byte sequence",
-    "Interrupted system call should be restarted",
-    "Streams pipe error",
-    "Too many users",
-    "Socket operation on non-socket",
-    "Destination address required",
-    "Message too long",
-    "Protocol wrong type for socket",
-    "Protocol not available",
-    "Protocol not supported",
-    "Socket type not supported",
-    "Operation not supported on transport endpoint",
-    "Protocol family not supported",
-    "Address family not supported by protocol",
-    "Address already in use",
-    "Cannot assign requested address",
-    "Network is down",
-    "Network is unreachable",
-    "Network dropped connection because of reset",
-    "Software caused connection abort",
-    "Connection reset by peer",
-    "No buffer space available",
-    "Transport endpoint is already connected",
-    "Transport endpoint is not connected",
-    "Cannot send after transport endpoint shutdown",
-    "Too many references: cannot splice",
-    "Connection timed out",
-    "Connection refused",
-    "Host is down",
-    "No route to host",
-    "Operation already in progress",
-    "Operation now in progress",
-    "Stale NFS file handle",
-    "Structure needs cleaning",
-    "Not a XENIX named type file",
-    "No XENIX semaphores available",
-    "Is a named type file",
-    "Remote I/O error",
-    "Quota exceeded",
-    "No medium found",
-    "Wrong medium type",
-    "Operation Canceled",
-    "Required key not available",
-    "Key has expired",
-    "Key has been revoked",
-    "Key was rejected by service",
-    "Owner died",
-    "State not recoverable",
-    "Reserved (formerly scheme-kernel message code)",
-];

src/flag.rs

@@ -1,567 +0,0 @@
-use bitflags::bitflags as inner_bitflags;
-use core::{mem, ops::Deref, slice};
-
-macro_rules! bitflags {
-    (
-        $(#[$outer:meta])*
-        pub struct $BitFlags:ident: $T:ty {
-            $(
-                $(#[$inner:ident $($args:tt)*])*
-                const $Flag:ident = $value:expr;
-            )+
-        }
-    ) => {
-        // First, use the inner bitflags
-        inner_bitflags! {
-            #[derive(PartialEq, Eq, PartialOrd, Ord, Hash, Debug, Clone, Copy, Default)]
-            $(#[$outer])*
-            pub struct $BitFlags: $T {
-                $(
-                    $(#[$inner $($args)*])*
-                    const $Flag = $value;
-                )+
-            }
-        }
-
-        impl $BitFlags {
-            #[deprecated = "use the safe `from_bits_retain` method instead"]
-            pub unsafe fn from_bits_unchecked(bits: $T) -> Self {
-                Self::from_bits_retain(bits)
-            }
-        }
-
-        // Secondly, re-export all inner constants
-        // (`pub use self::Struct::*` doesn't work)
-        $(
-            $(#[$inner $($args)*])*
-            pub const $Flag: $BitFlags = $BitFlags::$Flag;
-        )+
-    }
-}
-
-pub const CLOCK_REALTIME: usize = 1;
-pub const CLOCK_MONOTONIC: usize = 4;
-
-bitflags! {
-    pub struct EventFlags: usize {
-        const EVENT_NONE = 0;
-        const EVENT_READ = 1;
-        const EVENT_WRITE = 2;
-    }
-}
-
-pub const F_DUPFD: usize = 0;
-pub const F_GETFD: usize = 1;
-pub const F_SETFD: usize = 2;
-pub const F_GETFL: usize = 3;
-pub const F_SETFL: usize = 4;
-pub const F_DUPFD_CLOEXEC: usize = 1030;
-
-pub const FUTEX_WAIT: usize = 0;
-pub const FUTEX_WAKE: usize = 1;
-pub const FUTEX_REQUEUE: usize = 2;
-pub const FUTEX_WAIT64: usize = 3;
-
-// TODO: Split SendFdFlags into caller flags and flags that the scheme receives?
-bitflags::bitflags! {
-    #[derive(Clone, Copy, Debug)]
-    pub struct SendFdFlags: usize {
-        /// If set, the kernel will enforce that the file descriptors are exclusively owned.
-        ///
-        /// That is, there will no longer exist any other reference to those FDs when removed from
-        /// the file table (sendfd always removes the FDs from the file table, but without this
-        /// flag, it can be retained by SYS_DUPing them first).
-        const EXCLUSIVE = 1;
-
-        /// If set, the file descriptors will be cloned and *not* removed from the sender's file table.
-        /// By default, `SYS_SENDFD` moves the file descriptors, removing them from the sender.
-        const CLONE = 2;
-    }
-}
-bitflags::bitflags! {
-    #[derive(Clone, Copy, Debug)]
-    pub struct FobtainFdFlags: usize {
-        /// If set, the SYS_CALL payload specifies the destination file descriptor slots, otherwise the lowest
-        /// available slots will be selected, and placed in the usize pointed to by SYS_CALL
-        /// payload.
-        const MANUAL_FD = 1;
-
-        /// If set, the file descriptors received are guaranteed to be exclusively owned (by the file
-        /// table the obtainer is running in).
-        const EXCLUSIVE = 2;
-
-        /// If set, the file descriptors received will be placed into the *upper* file table.
-        const UPPER_TBL = 4;
-
-        /// If set, the received file descriptors are marked as close-on-exec.
-        const CLOEXEC = 8;
-
-        // No, cloexec won't be stored in the kernel in the future, when the stable ABI is moved to
-        // relibc, so no flag for that!
-    }
-}
-bitflags::bitflags! {
-    #[derive(Clone, Copy, Debug)]
-    pub struct RecvFdFlags: usize {
-        /// If set, the SYS_CALL payload specifies the destination file descriptor slots, otherwise the lowest
-        /// available slots will be selected, and placed in the usize pointed to by SYS_CALL
-        /// payload.
-        const MANUAL_FD = 1;
-
-        /// If set, the file descriptors received will be placed into the *upper* file table.
-        const UPPER_TBL = 2;
-
-        /// If set, the received file descriptors are marked as close-on-exec.
-        const CLOEXEC = 4;
-    }
-}
-bitflags::bitflags! {
-    #[derive(Clone, Copy, Debug)]
-    pub struct FmoveFdFlags: usize {
-        /// If set, the kernel will enforce that the file descriptors are exclusively owned.
-        ///
-        /// That is, there will no longer exist any other reference to those FDs when removed from
-        /// the file table (SYS_CALL always removes the FDs from the file table, but without this
-        /// flag, it can be retained by SYS_DUPing them first).
-        const EXCLUSIVE = 1;
-
-        /// If set, the file descriptors will be cloned and *not* removed from the sender's file table.
-        /// By default, sendfd moves the file descriptors, removing them from the sender.
-        const CLONE = 2;
-    }
-}
-
-bitflags! {
-    pub struct MapFlags: usize {
-        // TODO: Downgrade PROT_NONE to global constant? (bitflags specifically states zero flags
-        // can cause buggy behavior).
-        const PROT_NONE = 0x0000_0000;
-
-        const PROT_EXEC = 0x0001_0000;
-        const PROT_WRITE = 0x0002_0000;
-        const PROT_READ = 0x0004_0000;
-
-        const MAP_SHARED = 0x0001;
-        const MAP_PRIVATE = 0x0002;
-
-        const MAP_FIXED = 0x0004;
-        const MAP_FIXED_NOREPLACE = 0x000C;
-
-        /// For *userspace-backed mmaps*, return from the mmap call before all pages have been
-        /// provided by the scheme. This requires the scheme to be trusted, as the current context
-        /// can block indefinitely, if the scheme does not respond to the page fault handler's
-        /// request, as it tries to map the page by requesting it from the scheme.
-        ///
-        /// In some cases however, such as the program loader, the data needs to be trusted as much
-        /// with or without MAP_LAZY, and if so, mapping lazily will not cause insecureness by
-        /// itself.
-        ///
-        /// For kernel-backed mmaps, this flag has no effect at all. It is unspecified whether
-        /// kernel mmaps are lazy or not.
-        const MAP_LAZY = 0x0010;
-    }
-}
-bitflags! {
-    pub struct MunmapFlags: usize {
-        /// Indicates whether the funmap call must implicitly do an msync, for the changes to
-        /// become visible later.
-        ///
-        /// This flag will currently be set if and only if MAP_SHARED | PROT_WRITE are set.
-        const NEEDS_SYNC = 1;
-    }
-}
-
-pub const MODE_TYPE: u16 = 0xF000;
-pub const MODE_DIR: u16 = 0x4000;
-pub const MODE_FILE: u16 = 0x8000;
-pub const MODE_SYMLINK: u16 = 0xA000;
-pub const MODE_FIFO: u16 = 0x1000;
-pub const MODE_CHR: u16 = 0x2000;
-pub const MODE_SOCK: u16 = 0xC000;
-
-pub const MODE_PERM: u16 = 0x0FFF;
-pub const MODE_SETUID: u16 = 0o4000;
-pub const MODE_SETGID: u16 = 0o2000;
-
-pub const O_RDONLY: usize = 0x0001_0000;
-pub const O_WRONLY: usize = 0x0002_0000;
-pub const O_RDWR: usize = 0x0003_0000;
-pub const O_NONBLOCK: usize = 0x0004_0000;
-pub const O_APPEND: usize = 0x0008_0000;
-pub const O_SHLOCK: usize = 0x0010_0000;
-pub const O_EXLOCK: usize = 0x0020_0000;
-pub const O_ASYNC: usize = 0x0040_0000;
-pub const O_FSYNC: usize = 0x0080_0000;
-pub const O_CLOEXEC: usize = 0x0100_0000;
-pub const O_CREAT: usize = 0x0200_0000;
-pub const O_TRUNC: usize = 0x0400_0000;
-pub const O_EXCL: usize = 0x0800_0000;
-pub const O_DIRECTORY: usize = 0x1000_0000;
-pub const O_STAT: usize = 0x2000_0000;
-pub const O_SYMLINK: usize = 0x4000_0000;
-pub const O_NOFOLLOW: usize = 0x8000_0000;
-pub const O_ACCMODE: usize = O_RDONLY | O_WRONLY | O_RDWR;
-pub const O_FCNTL_MASK: usize = O_NONBLOCK | O_APPEND | O_ASYNC | O_FSYNC;
-
-/// Remove directory instead of unlinking file.
-pub const AT_REMOVEDIR: usize = 0x200;
-
-// The top 48 bits of PTRACE_* are reserved, for now
-
-// NOT ABI STABLE!
-#[derive(Clone, Copy, Debug, Default, Eq, PartialEq)]
-#[repr(usize)]
-pub enum ContextStatus {
-    Runnable,
-    Blocked,
-    NotYetStarted,
-    Dead,
-    ForceKilled,
-    Stopped,
-    UnhandledExcp,
-    #[default]
-    Other, // reserved
-}
-
-#[derive(Clone, Copy, Debug, Eq, PartialEq)]
-#[repr(usize)]
-pub enum ContextVerb {
-    Stop = 1,
-    Unstop = 2,
-    Interrupt = 3,
-    ForceKill = usize::MAX,
-}
-impl ContextVerb {
-    pub fn try_from_raw(raw: usize) -> Option<Self> {
-        Some(match raw {
-            1 => Self::Stop,
-            2 => Self::Unstop,
-            3 => Self::Interrupt,
-            usize::MAX => Self::ForceKill,
-            _ => return None,
-        })
-    }
-}
-
-// NOT ABI STABLE!
-#[derive(Clone, Copy, Debug, Eq, PartialEq)]
-#[repr(u8)]
-pub enum AddrSpaceVerb {
-    MmapMin = 255,
-}
-impl AddrSpaceVerb {
-    pub fn try_from_raw(verb: u8) -> Option<Self> {
-        Some(match verb {
-            255 => Self::MmapMin,
-
-            _ => return None,
-        })
-    }
-}
-
-// NOT ABI STABLE!
-#[derive(Clone, Copy, Debug, Eq, PartialEq)]
-#[repr(u8)]
-pub enum ProcSchemeVerb {
-    RegsInt = 250,
-    RegsFloat = 251,
-    RegsEnv = 252,
-    SchedAffinity = 253,
-    Start = 254,
-    Iopl = 255,
-}
-impl ProcSchemeVerb {
-    pub fn try_from_raw(verb: u8) -> Option<Self> {
-        Some(match verb {
-            250 => Self::RegsInt,
-            251 => Self::RegsFloat,
-            252 => Self::RegsEnv,
-            253 => Self::SchedAffinity,
-            254 => Self::Start,
-            255 => Self::Iopl,
-            _ => return None,
-        })
-    }
-}
-
-#[derive(Clone, Copy, Debug, Eq, PartialEq)]
-pub enum FileTableVerb {
-    Close = 1,
-    Dup2 = 2,
-    CloseCloExec = 3,
-}
-impl FileTableVerb {
-    pub fn try_from_raw(value: u8) -> Option<Self> {
-        Some(match value {
-            1 => Self::Close,
-            2 => Self::Dup2,
-            3 => Self::CloseCloExec,
-            _ => return None,
-        })
-    }
-}
-
-// NOT ABI-STABLE!
-#[derive(Clone, Copy, Debug, Eq, PartialEq)]
-#[repr(u64)]
-pub enum AcpiVerb {
-    // copies the rsdt/xsdt to the payload buffer (the number of bytes that fit), and returns the
-    // rsdt/xsdt length regardless
-    ReadRxsdt = 1,
-    // no payload, just returns 0 or 1
-    CheckShutdown = 2,
-    /// Red Bear OS extension (Phase I): acpid requests the kernel
-    /// enter s2idle (Modern Standby / S0ix). The kernel sets
-    /// `S2IDLE_REQUESTED`; the idle path calls `mwait_loop()`. Read
-    /// payload (1 byte) returns the *previous* value of the flag.
-    /// Write payload is opaque (ignored by current kernel).
-    /// Mirrors Linux 7.1 `s2idle_enter()` in
-    /// `kernel/power/suspend.c:91`. Hardware-agnostic — works on
-    /// any platform with Modern Standby firmware (Dell, HP, Lenovo,
-    /// LG Gram, etc.), not just LG Gram.
-    EnterS2Idle = 3,
-    /// Red Bear OS extension (Phase I): acpid signals s2idle
-    /// exit. Kernel clears `S2IDLE_REQUESTED`. Read payload (1
-    /// byte) always returns 0. Mirrors Linux 7.1 `s2idle_wake()` in
-    /// `kernel/power/suspend.c:133`. Hardware-agnostic.
-    ExitS2Idle = 4,
-    /// Red Bear OS extension (Phase II.X.W): acpid writes the
-    /// 64-bit kernel S3 resume trampoline address to
-    /// FACS.xfirmware_waking_vector. The kernel's
-    /// `arch/x86_shared/s3_resume.rs` trampoline is at this
-    /// address; the platform firmware jumps to it on S3 wake.
-    /// Write payload: 8-byte little-endian u64 (the trampoline
-    /// address). Read payload: 0 (no error condition; this verb
-    /// is one-way). Mirrors Linux 7.1's
-    /// `acpi_set_firmware_waking_vector` in ACPICA.
-    /// Hardware-agnostic: works on any x86_64 system with
-    /// standard ACPI S3 support (Dell, HP, Lenovo, LG Gram 14).
-    SetS3WakingVector = 5,
-    /// Red Bear OS extension (Phase II.X.W): acpid requests
-    /// the kernel to enter S3. The kernel's kstop handler
-    /// dispatches on the "s3" string arg, dispatches on the
-    /// SLP_TYP byte, and does the PM1 register write. The
-    /// acpid has already done the AML prep (`_TTS(3)`, `_PTS(3)`,
-    /// `_SST(3)`) and written the trampoline address to FACS
-    /// via `SetS3WakingVector`. No payload needed.
-    /// Mirrors Linux 7.1's `enter_sleep_state` /
-    /// `acpi_hw_legacy_sleep` for S3.
-    EnterS3 = 6,
-}
-impl AcpiVerb {
-    pub const fn try_from_raw(value: u64) -> Option<Self> {
-        Some(match value {
-            1 => Self::ReadRxsdt,
-            2 => Self::CheckShutdown,
-            3 => Self::EnterS2Idle,
-            4 => Self::ExitS2Idle,
-            5 => Self::SetS3WakingVector,
-            6 => Self::EnterS3,
-            _ => return None,
-        })
-    }
-}
-
-#[derive(Clone, Copy, Debug, Eq, PartialEq)]
-#[repr(usize)]
-pub enum SchemeSocketCall {
-    ObtainFd = 0,
-    MoveFd = 1,
-}
-impl SchemeSocketCall {
-    pub fn try_from_raw(raw: usize) -> Option<Self> {
-        Some(match raw {
-            0 => Self::ObtainFd,
-            1 => Self::MoveFd,
-            _ => return None,
-        })
-    }
-}
-
-#[derive(Clone, Copy, Debug, Eq, PartialEq)]
-#[repr(usize)]
-#[non_exhaustive]
-pub enum FsCall {
-    Connect = 0,
-}
-impl FsCall {
-    pub fn try_from_raw(raw: usize) -> Option<Self> {
-        Some(match raw {
-            0 => Self::Connect,
-            _ => return None,
-        })
-    }
-}
-
-bitflags! {
-    pub struct PtraceFlags: u64 {
-        /// Stop before a syscall is handled. Send PTRACE_FLAG_IGNORE to not
-        /// handle the syscall.
-        const PTRACE_STOP_PRE_SYSCALL = 0x0000_0000_0000_0001;
-        /// Stop after a syscall is handled.
-        const PTRACE_STOP_POST_SYSCALL = 0x0000_0000_0000_0002;
-        /// Stop after exactly one instruction. TODO: This may not handle
-        /// fexec/signal boundaries. Should it?
-        const PTRACE_STOP_SINGLESTEP = 0x0000_0000_0000_0004;
-        /// Stop before a signal is handled. Send PTRACE_FLAG_IGNORE to not
-        /// handle signal.
-        const PTRACE_STOP_SIGNAL = 0x0000_0000_0000_0008;
-        /// Stop on a software breakpoint, such as the int3 instruction for
-        /// x86_64.
-        const PTRACE_STOP_BREAKPOINT = 0x0000_0000_0000_0010;
-        /// Stop just before exiting for good.
-        const PTRACE_STOP_EXIT = 0x0000_0000_0000_0020;
-
-        const PTRACE_STOP_MASK = 0x0000_0000_0000_00FF;
-
-
-        /// Sent when a child is cloned, giving you the opportunity to trace it.
-        /// If you don't catch this, the child is started as normal.
-        const PTRACE_EVENT_CLONE = 0x0000_0000_0000_0100;
-
-        /// Sent when current-addrspace is changed, allowing the tracer to reopen the memory file.
-        const PTRACE_EVENT_ADDRSPACE_SWITCH = 0x0000_0000_0000_0200;
-
-        const PTRACE_EVENT_MASK = 0x0000_0000_0000_0F00;
-
-        /// Special meaning, depending on the event. Usually, when fired before
-        /// an action, it will skip performing that action.
-        const PTRACE_FLAG_IGNORE = 0x0000_0000_0000_1000;
-
-        const PTRACE_FLAG_MASK = 0x0000_0000_0000_F000;
-    }
-}
-impl Deref for PtraceFlags {
-    type Target = [u8];
-    fn deref(&self) -> &Self::Target {
-        // Same as to_ne_bytes but in-place
-        unsafe {
-            slice::from_raw_parts(&self.bits() as *const _ as *const u8, mem::size_of::<u64>())
-        }
-    }
-}
-
-pub const SEEK_SET: usize = 0;
-pub const SEEK_CUR: usize = 1;
-pub const SEEK_END: usize = 2;
-
-pub const SIGCHLD: usize = 17;
-pub const SIGTSTP: usize = 20;
-pub const SIGTTIN: usize = 21;
-pub const SIGTTOU: usize = 22;
-
-pub const ADDRSPACE_OP_MMAP: usize = 0;
-pub const ADDRSPACE_OP_MUNMAP: usize = 1;
-pub const ADDRSPACE_OP_MPROTECT: usize = 2;
-pub const ADDRSPACE_OP_TRANSFER: usize = 3;
-
-bitflags! {
-    pub struct MremapFlags: usize {
-        const FIXED = 1;
-        const FIXED_REPLACE = 3;
-        /// Alias's memory region at `old_address` to `new_address` such that both regions share
-        /// the same frames.
-        const KEEP_OLD = 1 << 2;
-        // TODO: MAYMOVE, DONTUNMAP
-    }
-}
-bitflags! {
-    pub struct RwFlags: u32 {
-        const NONBLOCK = 1;
-        const APPEND = 2;
-        // TODO: sync/dsync
-        // TODO: O_DIRECT?
-    }
-}
-bitflags! {
-    pub struct SigcontrolFlags: usize {
-        /// Prevents the kernel from jumping the context to the signal trampoline, but otherwise
-        /// has absolutely no effect on which signals are blocked etc. Meant to be used for
-        /// short-lived critical sections inside libc.
-        const INHIBIT_DELIVERY = 1;
-    }
-}
-bitflags! {
-    pub struct CallFlags: usize {
-        // reserved
-        const RSVD0 = 1 << 0;
-        const RSVD1 = 1 << 1;
-        const RSVD2 = 1 << 2;
-        const RSVD3 = 1 << 3;
-        const RSVD4 = 1 << 4;
-        const RSVD5 = 1 << 5;
-        const RSVD6 = 1 << 6;
-        const RSVD7 = 1 << 7;
-
-        /// Remove the fd from the caller's file table before sending the message.
-        const CONSUME = 1 << 8;
-
-        const WRITE = 1 << 9;
-        const READ = 1 << 10;
-
-        /// Indicates the request is a bulk fd passing request.
-        const FD = 1 << 11;
-        /// Flags for the fd passing request.
-        const FD_EXCLUSIVE = 1 << 12;
-        const FD_CLONE = 1 << 13;
-        const FD_UPPER = 1 << 14;
-        const FD_CLOEXEC = 1 << 15;
-
-        /// Call is a standard fs call, with metadata defined in `StdFsCallMeta`
-        const STD_FS = 1 << 16;
-
-        /// Call is taking multiple fds as an argument
-        const MULTIPLE_FDS = 1 << 17;
-    }
-}
-
-#[repr(u8)]
-#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord)]
-pub enum StdFsCallKind {
-    // TODO: remove old syscalls
-    Fchmod = 1,
-    Fchown = 2,
-    Getdents = 3,
-    Fstat = 4,
-    Fstatvfs = 5,
-    Fsync = 6,
-    Ftruncate = 7,
-    Futimens = 8,
-    // 9 reserved in fscall RFC
-    // Unlinkat = 10,
-    Relpathat = 11,
-    Lock = 12,
-    Unlock = 13,
-    GetLock = 14,
-}
-
-impl StdFsCallKind {
-    pub fn try_from_raw(raw: u8) -> Option<Self> {
-        use StdFsCallKind::*;
-
-        // TODO: Use a library where this match can be automated.
-        Some(match raw {
-            1 => Fchmod,
-            2 => Fchown,
-            3 => Getdents,
-            4 => Fstat,
-            5 => Fstatvfs,
-            6 => Fsync,
-            7 => Ftruncate,
-            8 => Futimens,
-            // 9 reserved in fscall RFC
-            // 10 => Unlinkat,
-            11 => Relpathat,
-            12 => Lock,
-            13 => Unlock,
-            14 => GetLock,
-            _ => return None,
-        })
-    }
-}
-
-/// The tag for the fd number in the upper file descriptor table.
-pub const UPPER_FDTBL_TAG: usize = 1 << (usize::BITS - 2);
-
-/// The identifier for registering event timeout
-pub const EVENT_TIMEOUT_ID: usize = usize::MAX - 2;

src/io/io.rs

@@ -1,73 +0,0 @@
-use core::{
-    cmp::PartialEq,
-    ops::{BitAnd, BitOr, Not},
-};
-
-pub trait Io {
-    type Value: Copy
-        + PartialEq
-        + BitAnd<Output = Self::Value>
-        + BitOr<Output = Self::Value>
-        + Not<Output = Self::Value>;
-
-    fn read(&self) -> Self::Value;
-    fn write(&mut self, value: Self::Value);
-
-    #[inline(always)]
-    fn readf(&self, flags: Self::Value) -> bool {
-        (self.read() & flags) as Self::Value == flags
-    }
-
-    #[inline(always)]
-    fn writef(&mut self, flags: Self::Value, value: bool) {
-        let tmp: Self::Value = match value {
-            true => self.read() | flags,
-            false => self.read() & !flags,
-        };
-        self.write(tmp);
-    }
-}
-
-pub struct ReadOnly<I> {
-    inner: I,
-}
-
-impl<I> ReadOnly<I> {
-    pub const fn new(inner: I) -> ReadOnly<I> {
-        ReadOnly { inner: inner }
-    }
-}
-
-impl<I: Io> ReadOnly<I> {
-    #[inline(always)]
-    pub fn read(&self) -> I::Value {
-        self.inner.read()
-    }
-
-    #[inline(always)]
-    pub fn readf(&self, flags: I::Value) -> bool {
-        self.inner.readf(flags)
-    }
-}
-
-pub struct WriteOnly<I> {
-    inner: I,
-}
-
-impl<I> WriteOnly<I> {
-    pub const fn new(inner: I) -> WriteOnly<I> {
-        WriteOnly { inner: inner }
-    }
-}
-
-impl<I: Io> WriteOnly<I> {
-    #[inline(always)]
-    pub fn write(&mut self, value: I::Value) {
-        self.inner.write(value)
-    }
-
-    #[inline(always)]
-    pub fn writef(&mut self, flags: I::Value, value: bool) {
-        self.inner.writef(flags, value)
-    }
-}

src/io/mmio.rs

@@ -1,165 +0,0 @@
-#[cfg(not(any(target_arch = "x86", target_arch = "x86_64")))]
-use core::ops::{BitAnd, BitOr, Not};
-use core::{mem::MaybeUninit, ptr};
-
-use super::io::Io;
-
-#[repr(transparent)]
-pub struct Mmio<T> {
-    value: MaybeUninit<T>,
-}
-
-impl<T> Mmio<T> {
-    pub unsafe fn zeroed() -> Self {
-        Self {
-            value: MaybeUninit::zeroed(),
-        }
-    }
-    pub unsafe fn uninit() -> Self {
-        Self {
-            value: MaybeUninit::uninit(),
-        }
-    }
-    pub const fn from(value: T) -> Self {
-        Self {
-            value: MaybeUninit::new(value),
-        }
-    }
-}
-
-// Generic implementation (WARNING: requires aligned pointers!)
-#[cfg(not(any(target_arch = "x86", target_arch = "x86_64")))]
-impl<T> Io for Mmio<T>
-where
-    T: Copy + PartialEq + BitAnd<Output = T> + BitOr<Output = T> + Not<Output = T>,
-{
-    type Value = T;
-
-    fn read(&self) -> T {
-        unsafe { ptr::read_volatile(ptr::addr_of!(self.value).cast::<T>()) }
-    }
-
-    fn write(&mut self, value: T) {
-        unsafe { ptr::write_volatile(ptr::addr_of_mut!(self.value).cast::<T>(), value) };
-    }
-}
-
-// x86 u8 implementation
-#[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
-impl Io for Mmio<u8> {
-    type Value = u8;
-
-    fn read(&self) -> Self::Value {
-        unsafe {
-            let value: Self::Value;
-            let ptr: *const Self::Value = ptr::addr_of!(self.value).cast::<Self::Value>();
-            core::arch::asm!(
-                "mov {}, [{}]",
-                out(reg_byte) value,
-                in(reg) ptr
-            );
-            value
-        }
-    }
-
-    fn write(&mut self, value: Self::Value) {
-        unsafe {
-            let ptr: *mut Self::Value = ptr::addr_of_mut!(self.value).cast::<Self::Value>();
-            core::arch::asm!(
-                "mov [{}], {}",
-                in(reg) ptr,
-                in(reg_byte) value,
-            );
-        }
-    }
-}
-
-// x86 u16 implementation
-#[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
-impl Io for Mmio<u16> {
-    type Value = u16;
-
-    fn read(&self) -> Self::Value {
-        unsafe {
-            let value: Self::Value;
-            let ptr: *const Self::Value = ptr::addr_of!(self.value).cast::<Self::Value>();
-            core::arch::asm!(
-                "mov {:x}, [{}]",
-                out(reg) value,
-                in(reg) ptr
-            );
-            value
-        }
-    }
-
-    fn write(&mut self, value: Self::Value) {
-        unsafe {
-            let ptr: *mut Self::Value = ptr::addr_of_mut!(self.value).cast::<Self::Value>();
-            core::arch::asm!(
-                "mov [{}], {:x}",
-                in(reg) ptr,
-                in(reg) value,
-            );
-        }
-    }
-}
-
-// x86 u32 implementation
-#[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
-impl Io for Mmio<u32> {
-    type Value = u32;
-
-    fn read(&self) -> Self::Value {
-        unsafe {
-            let value: Self::Value;
-            let ptr: *const Self::Value = ptr::addr_of!(self.value).cast::<Self::Value>();
-            core::arch::asm!(
-                "mov {:e}, [{}]",
-                out(reg) value,
-                in(reg) ptr
-            );
-            value
-        }
-    }
-
-    fn write(&mut self, value: Self::Value) {
-        unsafe {
-            let ptr: *mut Self::Value = ptr::addr_of_mut!(self.value).cast::<Self::Value>();
-            core::arch::asm!(
-                "mov [{}], {:e}",
-                in(reg) ptr,
-                in(reg) value,
-            );
-        }
-    }
-}
-
-// x86 u64 implementation (x86_64 only)
-#[cfg(target_arch = "x86_64")]
-impl Io for Mmio<u64> {
-    type Value = u64;
-
-    fn read(&self) -> Self::Value {
-        unsafe {
-            let value: Self::Value;
-            let ptr: *const Self::Value = ptr::addr_of!(self.value).cast::<Self::Value>();
-            core::arch::asm!(
-                "mov {:r}, [{}]",
-                out(reg) value,
-                in(reg) ptr
-            );
-            value
-        }
-    }
-
-    fn write(&mut self, value: Self::Value) {
-        unsafe {
-            let ptr: *mut Self::Value = ptr::addr_of_mut!(self.value).cast::<Self::Value>();
-            core::arch::asm!(
-                "mov [{}], {:r}",
-                in(reg) ptr,
-                in(reg) value,
-            );
-        }
-    }
-}

src/io/mod.rs

@@ -1,12 +0,0 @@
-//! I/O functions
-
-pub use self::{io::*, mmio::*};
-
-#[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
-pub use self::pio::*;
-
-mod io;
-mod mmio;
-
-#[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
-mod pio;

src/io/pio.rs

@@ -1,89 +0,0 @@
-use core::{arch::asm, marker::PhantomData};
-
-use super::io::Io;
-
-/// Generic PIO
-#[derive(Copy, Clone)]
-pub struct Pio<T> {
-    port: u16,
-    value: PhantomData<T>,
-}
-
-impl<T> Pio<T> {
-    /// Create a PIO from a given port
-    pub const fn new(port: u16) -> Self {
-        Pio::<T> {
-            port,
-            value: PhantomData,
-        }
-    }
-}
-
-/// Read/Write for byte PIO
-impl Io for Pio<u8> {
-    type Value = u8;
-
-    /// Read
-    #[inline(always)]
-    fn read(&self) -> u8 {
-        let value: u8;
-        unsafe {
-            asm!("in al, dx", in("dx") self.port, out("al") value, options(nostack, nomem, preserves_flags));
-        }
-        value
-    }
-
-    /// Write
-    #[inline(always)]
-    fn write(&mut self, value: u8) {
-        unsafe {
-            asm!("out dx, al", in("dx") self.port, in("al") value, options(nostack, nomem, preserves_flags));
-        }
-    }
-}
-
-/// Read/Write for word PIO
-impl Io for Pio<u16> {
-    type Value = u16;
-
-    /// Read
-    #[inline(always)]
-    fn read(&self) -> u16 {
-        let value: u16;
-        unsafe {
-            asm!("in ax, dx", in("dx") self.port, out("ax") value, options(nostack, nomem, preserves_flags));
-        }
-        value
-    }
-
-    /// Write
-    #[inline(always)]
-    fn write(&mut self, value: u16) {
-        unsafe {
-            asm!("out dx, ax", in("dx") self.port, in("ax") value, options(nostack, nomem, preserves_flags));
-        }
-    }
-}
-
-/// Read/Write for doubleword PIO
-impl Io for Pio<u32> {
-    type Value = u32;
-
-    /// Read
-    #[inline(always)]
-    fn read(&self) -> u32 {
-        let value: u32;
-        unsafe {
-            asm!("in eax, dx", in("dx") self.port, out("eax") value, options(nostack, nomem, preserves_flags));
-        }
-        value
-    }
-
-    /// Write
-    #[inline(always)]
-    fn write(&mut self, value: u32) {
-        unsafe {
-            asm!("out dx, eax", in("dx") self.port, in("eax") value, options(nostack, nomem, preserves_flags));
-        }
-    }
-}

src/lib.rs

@@ -1,53 +1,92 @@
-#![cfg_attr(not(any(feature = "std", test)), no_std)]
-#![allow(unexpected_cfgs)] // why does this even exist?
+//! Redox OS user and group utilities.
+//!
+//! The `userutils` crate contains the utilities for dealing with users and groups in Redox OS.
+//! They are heavily influenced by UNIX and are, when needed, tailored to specific Redox use cases.
+//!
+//! These implementations strive to be as simple as possible drawing particular
+//! inspiration by BSD systems. They are indeed small, by choice.
+//!
+//! The included utilities are:
+//!
+//! - `getty`: Used by `init(8)` to open and initialize the TTY line, read a login name and invoke `login(1)`.
+//! - `id`: Displays user identity.
+//! - `login`: Allows users to into the system.
+//! - `passwd`: Allows users to modify their passwords.
+//! - `su`: Allows users to substitute identity.
+//! - `sudo`: Enables users to execute a command as another user.
+//! - `whoami`: Display effective user ID.
 
-#[cfg(test)]
-extern crate core;
+use std::io::Result as IoResult;
 
-pub use self::{arch::*, data::*, error::*, flag::*, io::*, number::*};
+use libredox::call::{fchown, open};
+use libredox::error::Result as SysResult;
+use libredox::flag::{O_CLOEXEC, O_CREAT, O_DIRECTORY};
+use redox_users::{All, AllGroups, Error, Result, User, auth};
 
-#[cfg(target_arch = "aarch64")]
-#[path = "arch/aarch64.rs"]
-mod arch;
+const DEFAULT_MODE: u16 = 0o700;
 
-#[cfg(target_arch = "riscv64")]
-#[path = "arch/riscv64.rs"]
-mod arch;
+// Not the prettiest thing in the world, but some functionality here makes
+// some of the utils much less gross
+pub trait AllGroupsExt {
+    fn add_user_to_groups(&mut self, login: &str, groups: Vec<&str>) -> Result<()>;
+    fn remove_user_from_all_groups(&mut self, login: &str);
+}
 
-#[cfg(target_arch = "x86")]
-#[path = "arch/x86.rs"]
-mod arch;
+impl AllGroupsExt for AllGroups {
+    // new_groups is a comma separated list of groupnames
+    fn add_user_to_groups(&mut self, login: &str, new_groups: Vec<&str>) -> Result<()> {
+        for groupname in new_groups {
+            let group = match self.get_mut_by_name(groupname) {
+                Some(group) => group,
+                None => return Err(Error::UserNotFound),
+            };
+            group.users.push(login.to_string());
+        }
+        Ok(())
+    }
 
-#[cfg(target_arch = "x86_64")]
-#[path = "arch/x86_64.rs"]
-mod arch;
+    /// Remove a user from all groups of which they are a member
+    fn remove_user_from_all_groups(&mut self, login: &str) {
+        for group in self.iter_mut() {
+            let op_pos = group.users.iter().position(|username| username == login);
+            if let Some(indx) = op_pos {
+                group.users.remove(indx);
+            }
+        }
+    }
+}
 
-/// Function definitions
-#[cfg(feature = "userspace")]
-pub mod call;
+/// Spawns a shell for the given `User`.
+///
+/// This function wraps the shell_cmd function of the User struct
+/// from redox_users and manages the child process. It is a blocking
+/// operation.
+///
+/// # Examples
+///
+/// ```
+/// use redox_users::AllUsers;
+///
+/// let sys_users = AllUsers::new().unwrap();
+/// let user = sys_users.get_by_name("goyox86");
+/// spawn_shell(user).unwrap();
+/// ```
+pub fn spawn_shell<T: Default>(user: &User<T>) -> IoResult<i32> {
+    let mut command = user.shell_cmd();
 
-#[cfg(feature = "userspace")]
-pub use call::*;
+    let mut child = command.spawn()?;
+    match child.wait()?.code() {
+        Some(code) => Ok(code),
+        None => Ok(1),
+    }
+}
 
-/// Complex structures that are used for some system calls
-pub mod data;
-
-pub mod dirent;
-
-/// All errors that can be generated by a system call
-pub mod error;
-
-/// Flags used as an argument to many system calls
-pub mod flag;
-
-/// Functions for low level hardware control
-pub mod io;
-
-/// Call numbers used by each system call
-pub mod number;
-
-/// ABI for shared memory based signals
-pub mod sigabi;
-
-/// V2 scheme format
-pub mod schemev2;
+/// Creates a directory with 700 user:user permissions
+pub fn create_user_dir<T>(user: &User<auth::Full>, dir: T) -> SysResult<()>
+where
+    T: AsRef<str> + std::convert::AsRef<[u8]>,
+{
+    let fd = open(dir, O_CREAT | O_DIRECTORY | O_CLOEXEC, DEFAULT_MODE)?;
+    fchown(fd, user.uid as u32, user.gid as u32)?;
+    Ok(())
+}

src/number.rs

@@ -1,58 +0,0 @@
-pub const SYS_CLASS: usize = 0xF000_0000;
-pub const SYS_CLASS_PATH: usize = 0x1000_0000;
-pub const SYS_CLASS_FILE: usize = 0x2000_0000;
-
-pub const SYS_ARG: usize = 0x0F00_0000;
-pub const SYS_ARG_SLICE: usize = 0x0100_0000;
-pub const SYS_ARG_MSLICE: usize = 0x0200_0000;
-pub const SYS_ARG_PATH: usize = 0x0300_0000;
-
-pub const SYS_RET: usize = 0x00F0_0000;
-pub const SYS_RET_FILE: usize = 0x0010_0000;
-
-pub const SYS_OPENAT: usize = SYS_CLASS_PATH | SYS_RET_FILE | 7;
-pub const SYS_OPENAT_WITH_FILTER: usize = SYS_CLASS_PATH | SYS_RET_FILE | 985;
-pub const SYS_UNLINKAT: usize = SYS_CLASS_PATH | 263;
-pub const SYS_UNLINKAT_WITH_FILTER: usize = SYS_CLASS_PATH | 986;
-
-pub const SYS_CLOSE: usize = SYS_CLASS_FILE | 6;
-pub const SYS_DUP: usize = SYS_CLASS_FILE | SYS_RET_FILE | 41;
-pub const SYS_DUP2: usize = SYS_CLASS_FILE | SYS_RET_FILE | 63;
-pub const SYS_READ: usize = SYS_CLASS_FILE | SYS_ARG_MSLICE | 3;
-pub const SYS_READ2: usize = SYS_CLASS_FILE | SYS_ARG_MSLICE | 35;
-pub const SYS_WRITE: usize = SYS_CLASS_FILE | SYS_ARG_SLICE | 4;
-pub const SYS_WRITE2: usize = SYS_CLASS_FILE | SYS_ARG_SLICE | 45;
-pub const SYS_LSEEK: usize = SYS_CLASS_FILE | 19;
-pub const SYS_FCHMOD: usize = SYS_CLASS_FILE | 94;
-pub const SYS_FCHOWN: usize = SYS_CLASS_FILE | 207;
-pub const SYS_FCNTL: usize = SYS_CLASS_FILE | 55;
-pub const SYS_FEVENT: usize = SYS_CLASS_FILE | 927;
-
-// SYS_CALL, fd, inout buf ptr, inout buf len, flags, metadata buf ptr, metadata buf len
-// TODO: new number for SYS_CALL where flags are sent as 6th argument (using syscall6)
-pub const SYS_CALL: usize = SYS_CLASS_FILE | SYS_ARG_SLICE | SYS_ARG_MSLICE | 0xCA11;
-
-pub const SYS_SENDFD: usize = SYS_CLASS_FILE | 34;
-pub const SYS_GETDENTS: usize = SYS_CLASS_FILE | 43;
-
-// TODO: Rename FMAP/FUNMAP to MMAP/MUNMAP
-pub const SYS_FMAP: usize = SYS_CLASS_FILE | SYS_ARG_SLICE | 900;
-// TODO: SYS_FUNMAP should be SYS_CLASS_FILE
-pub const SYS_FUNMAP: usize = SYS_CLASS_FILE | 92;
-pub const SYS_MREMAP: usize = 155;
-
-pub const SYS_FLINK: usize = SYS_CLASS_FILE | SYS_ARG_PATH | 9;
-pub const SYS_FPATH: usize = SYS_CLASS_FILE | SYS_ARG_MSLICE | 928;
-pub const SYS_FRENAME: usize = SYS_CLASS_FILE | SYS_ARG_PATH | 38;
-pub const SYS_FSTAT: usize = SYS_CLASS_FILE | SYS_ARG_MSLICE | 28;
-pub const SYS_FSTATVFS: usize = SYS_CLASS_FILE | SYS_ARG_MSLICE | 100;
-pub const SYS_FSYNC: usize = SYS_CLASS_FILE | 118;
-pub const SYS_FTRUNCATE: usize = SYS_CLASS_FILE | 93;
-pub const SYS_FUTIMENS: usize = SYS_CLASS_FILE | SYS_ARG_SLICE | 320;
-
-pub const SYS_CLOCK_GETTIME: usize = 265;
-pub const SYS_FUTEX: usize = 240;
-pub const SYS_MPROTECT: usize = 125;
-pub const SYS_MKNS: usize = 984;
-pub const SYS_NANOSLEEP: usize = 162;
-pub const SYS_YIELD: usize = 158;

src/schemev2.rs

@@ -1,213 +0,0 @@
-use core::{
-    mem,
-    ops::{Deref, DerefMut},
-    slice,
-};
-
-use bitflags::bitflags;
-
-pub struct CallerCtx {
-    pub pid: usize,
-    pub uid: u32,
-    pub gid: u32,
-}
-
-pub enum OpenResult {
-    ThisScheme { number: usize },
-    OtherScheme { fd: usize },
-}
-
-#[repr(C)]
-#[derive(Clone, Copy, Debug, Default)]
-pub struct Sqe {
-    pub opcode: u8,
-    pub sqe_flags: SqeFlags,
-    pub _rsvd: u16, // TODO: priority
-    pub tag: u32,
-    pub args: [u64; 6],
-    pub caller: u64,
-}
-impl Deref for Sqe {
-    type Target = [u8];
-    fn deref(&self) -> &[u8] {
-        unsafe { slice::from_raw_parts(self as *const Sqe as *const u8, mem::size_of::<Sqe>()) }
-    }
-}
-
-impl DerefMut for Sqe {
-    fn deref_mut(&mut self) -> &mut [u8] {
-        unsafe { slice::from_raw_parts_mut(self as *mut Sqe as *mut u8, mem::size_of::<Sqe>()) }
-    }
-}
-
-bitflags! {
-    #[derive(Clone, Copy, Debug, Default)]
-    pub struct SqeFlags: u8 {
-        // If zero, the message is bidirectional, and the scheme is expected to pass the Ksmsg's
-        // tag field to the Skmsg. Some opcodes require this flag to be set.
-        const ONEWAY = 1;
-
-        // If this flag is set, index 0 of Sqe's args stores the IDs buffer address,
-        // and index 1 stores the IDs buffer length.
-        const MULTIPLE_IDS = 1 << 1;
-    }
-}
-
-#[repr(C)]
-#[derive(Clone, Copy, Debug, Default)]
-pub struct Cqe {
-    pub flags: u8, // bits 2:0 are CqeOpcode
-    pub extra_raw: [u8; 3],
-    pub tag: u32,
-    pub result: u64,
-}
-impl Deref for Cqe {
-    type Target = [u8];
-    fn deref(&self) -> &[u8] {
-        unsafe { slice::from_raw_parts(self as *const Cqe as *const u8, mem::size_of::<Cqe>()) }
-    }
-}
-
-impl DerefMut for Cqe {
-    fn deref_mut(&mut self) -> &mut [u8] {
-        unsafe { slice::from_raw_parts_mut(self as *mut Cqe as *mut u8, mem::size_of::<Cqe>()) }
-    }
-}
-
-bitflags! {
-    #[derive(Clone, Copy, Debug, Default, Eq, PartialEq)]
-    pub struct NewFdFlags: u8 {
-        const POSITIONED = 1;
-    }
-}
-
-impl Cqe {
-    pub fn extra(&self) -> u32 {
-        u32::from_ne_bytes([self.extra_raw[0], self.extra_raw[1], self.extra_raw[2], 0])
-    }
-}
-
-#[repr(u8)]
-#[derive(Clone, Copy, Debug, Eq, PartialEq)]
-pub enum CqeOpcode {
-    RespondRegular,
-    RespondWithFd,
-    SendFevent, // no tag
-    ObtainFd,
-    RespondWithMultipleFds,
-    /// [`SchemeAsync::on_close`] and [`SchemeSync::on_close`] are only called when the last file
-    /// descriptor referring to the file description is closed. To implement traditional POSIX
-    /// advisory file locking, [`CqeOpcode::RespondAndNotifyOnDetach`] is used to notify the scheme
-    /// by sending a [`RequestKind::OnDetach`] request the next time the file description is
-    /// "detached" from a file descriptor. Not done by default to avoid unnecessary IPC.
-    RespondAndNotifyOnDetach,
-    // TODO: ProvideMmap
-}
-
-impl CqeOpcode {
-    pub fn try_from_raw(raw: u8) -> Option<Self> {
-        // TODO: Use a library where this match can be automated.
-        Some(match raw {
-            0 => Self::RespondRegular,
-            1 => Self::RespondWithFd,
-            2 => Self::SendFevent,
-            3 => Self::ObtainFd,
-            4 => Self::RespondWithMultipleFds,
-            5 => Self::RespondAndNotifyOnDetach,
-            _ => return None,
-        })
-    }
-}
-
-/// SqeOpcode
-#[repr(u8)]
-#[non_exhaustive]
-#[derive(Clone, Copy, Debug)]
-pub enum Opcode {
-    Close = 3,   // fd
-    Dup = 4,     // old fd, buf_ptr, buf_len
-    Read = 5,    // fd, buf_ptr, buf_len, TODO offset, TODO flags, _
-    Write = 6,   // fd, buf_ptr, buf_len, TODO offset, TODO flags)
-    Fsize = 7,   // fd
-    Fchmod = 8,  // fd, new mode
-    Fchown = 9,  // fd, new uid, new gid
-    Fcntl = 10,  // fd, cmd, arg
-    Fevent = 11, // fd, requested mask
-    Sendfd = 12,
-    Fpath = 13, // fd, buf_ptr, buf_len
-    Frename = 14,
-    Fstat = 15,     // fd, buf_ptr, buf_len
-    Fstatvfs = 16,  // fd, buf_ptr, buf_len
-    Fsync = 17,     // fd
-    Ftruncate = 18, // fd, new len
-    Futimens = 19,  // fd, times_buf, times_len
-
-    MmapPrep = 20,
-    RequestMmap = 21,
-    Mremap = 22,
-    Munmap = 23,
-    Msync = 24, // TODO
-
-    Cancel = 25, // @tag
-
-    Getdents = 26,
-    CloseMsg = 27,
-    Call = 28,
-
-    OpenAt = 29, // fd, buf_ptr, buf_len, flags
-    Flink = 30,
-    Recvfd = 31,
-
-    UnlinkAt = 32, // fd, path_ptr, path_len (utf8), flags
-    StdFsCall = 33,
-
-    Detach = 34,
-}
-
-impl Opcode {
-    pub fn try_from_raw(raw: u8) -> Option<Self> {
-        use Opcode::*;
-
-        // TODO: Use a library where this match can be automated.
-        Some(match raw {
-            3 => Close,
-            4 => Dup,
-            5 => Read,
-            6 => Write,
-            7 => Fsize,
-            8 => Fchmod,
-            9 => Fchown,
-            10 => Fcntl,
-            11 => Fevent,
-            12 => Sendfd,
-            13 => Fpath,
-            14 => Frename,
-            15 => Fstat,
-            16 => Fstatvfs,
-            17 => Fsync,
-            18 => Ftruncate,
-            19 => Futimens,
-
-            20 => MmapPrep,
-            21 => RequestMmap,
-            22 => Mremap,
-            23 => Munmap,
-            24 => Msync,
-
-            25 => Cancel,
-            26 => Getdents,
-            27 => CloseMsg,
-            28 => Call,
-
-            29 => OpenAt,
-            30 => Flink,
-            31 => Recvfd,
-
-            32 => UnlinkAt,
-            33 => StdFsCall,
-            34 => Detach,
-
-            _ => return None,
-        })
-    }
-}

src/sigabi.rs

@@ -1,340 +0,0 @@
-use core::sync::atomic::{AtomicUsize, Ordering};
-
-/// Signal runtime struct for the entire process
-#[derive(Debug)]
-#[repr(C, align(4096))]
-pub struct SigProcControl {
-    pub pending: AtomicU64,
-    pub actions: [RawAction; 64],
-    pub sender_infos: [AtomicU64; 32],
-    //pub queue: [RealtimeSig; 32], TODO
-    // qhead, qtail TODO
-}
-/*#[derive(Debug)]
-#[repr(transparent)]
-pub struct RealtimeSig {
-    pub arg: NonatomicUsize,
-}*/
-#[derive(Debug, Default)]
-#[repr(C, align(16))]
-pub struct RawAction {
-    /// Only two MSBs are interesting for the kernel. If bit 63 is set, signal is ignored. If bit
-    /// 62 is set and the signal is SIGTSTP/SIGTTIN/SIGTTOU, it's equivalent to the action of
-    /// Stop.
-    pub first: AtomicU64,
-    /// Completely ignored by the kernel, but exists so userspace can (when 16-byte atomics exist)
-    /// atomically set both the handler, sigaction flags, and sigaction mask.
-    pub user_data: AtomicU64,
-}
-
-/// Signal runtime struct for a thread
-#[derive(Debug, Default)]
-#[repr(C)]
-pub struct Sigcontrol {
-    // composed of [lo "pending" | lo "unmasked", hi "pending" | hi "unmasked"]
-    pub word: [AtomicU64; 2],
-
-    // lo = sender pid, hi = sender ruid
-    pub sender_infos: [AtomicU64; 32],
-
-    pub control_flags: SigatomicUsize,
-
-    pub saved_ip: NonatomicUsize,          // rip/eip/pc
-    pub saved_archdep_reg: NonatomicUsize, // rflags(x64)/eflags(x86)/x0(aarch64)/t0(riscv64)
-}
-#[derive(Clone, Copy, Debug)]
-pub struct SenderInfo {
-    pub pid: u32,
-    pub ruid: u32,
-}
-impl SenderInfo {
-    #[inline]
-    pub fn raw(self) -> u64 {
-        u64::from(self.pid) | (u64::from(self.ruid) << 32)
-    }
-    #[inline]
-    pub const fn from_raw(raw: u64) -> Self {
-        Self {
-            pid: raw as u32,
-            ruid: (raw >> 32) as u32,
-        }
-    }
-}
-
-impl Sigcontrol {
-    pub fn currently_pending_unblocked(&self, proc: &SigProcControl) -> u64 {
-        let proc_pending = proc.pending.load(Ordering::Relaxed);
-        let [w0, w1] = core::array::from_fn(|i| {
-            let w = self.word[i].load(Ordering::Relaxed);
-            ((w | (proc_pending >> (i * 32))) & 0xffff_ffff) & (w >> 32)
-        });
-        //core::sync::atomic::fence(Ordering::Acquire);
-        w0 | (w1 << 32)
-    }
-    pub fn set_allowset(&self, new_allowset: u64) -> u64 {
-        //core::sync::atomic::fence(Ordering::Release);
-        let [w0, w1] = self.word.each_ref().map(|w| w.load(Ordering::Relaxed));
-        let old_a0 = w0 & 0xffff_ffff_0000_0000;
-        let old_a1 = w1 & 0xffff_ffff_0000_0000;
-        let new_a0 = (new_allowset & 0xffff_ffff) << 32;
-        let new_a1 = new_allowset & 0xffff_ffff_0000_0000;
-
-        let prev_w0 = self.word[0].fetch_add(new_a0.wrapping_sub(old_a0), Ordering::Relaxed);
-        let prev_w1 = self.word[0].fetch_add(new_a1.wrapping_sub(old_a1), Ordering::Relaxed);
-        //core::sync::atomic::fence(Ordering::Acquire);
-        let up0 = prev_w0 & (prev_w0 >> 32);
-        let up1 = prev_w1 & (prev_w1 >> 32);
-
-        up0 | (up1 << 32)
-    }
-}
-
-#[derive(Debug, Default)]
-#[repr(transparent)]
-pub struct SigatomicUsize(AtomicUsize);
-
-impl SigatomicUsize {
-    #[inline]
-    pub fn load(&self, ordering: Ordering) -> usize {
-        let value = self.0.load(Ordering::Relaxed);
-        if ordering != Ordering::Relaxed {
-            core::sync::atomic::compiler_fence(ordering);
-        }
-        value
-    }
-    #[inline]
-    pub fn store(&self, value: usize, ordering: Ordering) {
-        if ordering != Ordering::Relaxed {
-            core::sync::atomic::compiler_fence(ordering);
-        }
-        self.0.store(value, Ordering::Relaxed);
-    }
-}
-#[derive(Debug, Default)]
-#[repr(transparent)]
-pub struct NonatomicUsize(AtomicUsize);
-
-impl NonatomicUsize {
-    #[inline]
-    pub const fn new(a: usize) -> Self {
-        Self(AtomicUsize::new(a))
-    }
-
-    #[inline]
-    pub fn get(&self) -> usize {
-        self.0.load(Ordering::Relaxed)
-    }
-    #[inline]
-    pub fn set(&self, value: usize) {
-        self.0.store(value, Ordering::Relaxed);
-    }
-}
-
-pub fn sig_bit(sig: usize) -> u64 {
-    1 << (sig - 1)
-}
-
-// TODO: Move to redox_rt?
-impl SigProcControl {
-    /// Checks if `sig` should be ignored based on the current action flags.
-    ///
-    /// * `sig` - The signal to check (e.g. `SIGCHLD`).
-    ///
-    /// * `stop_or_continue` - Whether the signal is generated because a child
-    /// process stopped (`SIGSTOP`, `SIGTSTP`) or continued (`SIGCONT`). If
-    /// `true` and `sig` is `SIGCHLD`, the signal shall not be delivered if the
-    /// `SA_NOCLDSTOP` flag is set for `SIGCHLD`.
-    pub fn signal_will_ign(&self, sig: usize, stop_or_continue: bool) -> bool {
-        let flags = self.actions[sig - 1].first.load(Ordering::Relaxed);
-        let will_ign = flags & (1 << 63) != 0;
-        let sig_specific = flags & (1 << 62) != 0; // SA_NOCLDSTOP if sig == SIGCHLD
-
-        will_ign || (sig == SIGCHLD && stop_or_continue && sig_specific)
-    }
-    // TODO: Move to redox_rt?
-    pub fn signal_will_stop(&self, sig: usize) -> bool {
-        use crate::flag::*;
-        matches!(sig, SIGTSTP | SIGTTIN | SIGTTOU)
-            && self.actions[sig - 1].first.load(Ordering::Relaxed) & (1 << 62) != 0
-    }
-}
-
-#[cfg(not(target_arch = "x86"))]
-pub use core::sync::atomic::AtomicU64;
-
-use crate::SIGCHLD;
-
-#[cfg(target_arch = "x86")]
-pub use self::atomic::AtomicU64;
-
-#[cfg(target_arch = "x86")]
-mod atomic {
-    use core::{cell::UnsafeCell, sync::atomic::Ordering};
-
-    #[derive(Debug, Default)]
-    pub struct AtomicU64(UnsafeCell<u64>);
-
-    unsafe impl Send for AtomicU64 {}
-    unsafe impl Sync for AtomicU64 {}
-
-    impl AtomicU64 {
-        pub const fn new(inner: u64) -> Self {
-            Self(UnsafeCell::new(inner))
-        }
-        pub fn compare_exchange(
-            &self,
-            old: u64,
-            new: u64,
-            _success: Ordering,
-            _failure: Ordering,
-        ) -> Result<u64, u64> {
-            let old_hi = (old >> 32) as u32;
-            let old_lo = old as u32;
-            let new_hi = (new >> 32) as u32;
-            let new_lo = new as u32;
-            let mut out_hi;
-            let mut out_lo;
-
-            unsafe {
-                core::arch::asm!("lock cmpxchg8b [{}]", in(reg) self.0.get(), inout("edx") old_hi => out_hi, inout("eax") old_lo => out_lo, in("ecx") new_hi, in("ebx") new_lo);
-            }
-
-            if old_hi == out_hi && old_lo == out_lo {
-                Ok(old)
-            } else {
-                Err(u64::from(out_lo) | (u64::from(out_hi) << 32))
-            }
-        }
-        pub fn load(&self, ordering: Ordering) -> u64 {
-            match self.compare_exchange(0, 0, ordering, ordering) {
-                Ok(new) => new,
-                Err(new) => new,
-            }
-        }
-        pub fn store(&self, new: u64, ordering: Ordering) {
-            let mut old = 0;
-
-            loop {
-                match self.compare_exchange(old, new, ordering, Ordering::Relaxed) {
-                    Ok(_) => break,
-                    Err(new) => {
-                        old = new;
-                        core::hint::spin_loop();
-                    }
-                }
-            }
-        }
-        pub fn fetch_update(
-            &self,
-            set_order: Ordering,
-            fetch_order: Ordering,
-            mut f: impl FnMut(u64) -> Option<u64>,
-        ) -> Result<u64, u64> {
-            let mut old = self.load(fetch_order);
-
-            loop {
-                let new = f(old).ok_or(old)?;
-                match self.compare_exchange(old, new, set_order, Ordering::Relaxed) {
-                    Ok(_) => return Ok(new),
-                    Err(changed) => {
-                        old = changed;
-                        core::hint::spin_loop();
-                    }
-                }
-            }
-        }
-        pub fn fetch_or(&self, bits: u64, order: Ordering) -> u64 {
-            self.fetch_update(order, Ordering::Relaxed, |b| Some(b | bits))
-                .unwrap()
-        }
-        pub fn fetch_and(&self, bits: u64, order: Ordering) -> u64 {
-            self.fetch_update(order, Ordering::Relaxed, |b| Some(b & bits))
-                .unwrap()
-        }
-        pub fn fetch_add(&self, term: u64, order: Ordering) -> u64 {
-            self.fetch_update(order, Ordering::Relaxed, |b| Some(b.wrapping_add(term)))
-                .unwrap()
-        }
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use std::sync::{
-        atomic::{AtomicU64, Ordering},
-        Arc,
-    };
-
-    #[cfg(not(loom))]
-    use std::{sync::Mutex, thread};
-    #[cfg(not(loom))]
-    fn model(f: impl FnOnce()) {
-        f()
-    }
-
-    #[cfg(loom)]
-    use loom::{model, sync::Mutex, thread};
-
-    use crate::{RawAction, SigProcControl, Sigcontrol};
-
-    struct FakeThread {
-        ctl: Sigcontrol,
-        pctl: SigProcControl,
-        ctxt: Mutex<()>,
-    }
-    impl Default for FakeThread {
-        fn default() -> Self {
-            Self {
-                ctl: Sigcontrol::default(),
-                pctl: SigProcControl {
-                    pending: AtomicU64::new(0),
-                    actions: core::array::from_fn(|_| RawAction::default()),
-                    sender_infos: Default::default(),
-                },
-                ctxt: Default::default(),
-            }
-        }
-    }
-
-    #[test]
-    fn singlethread_mask() {
-        model(|| {
-            let fake_thread = Arc::new(FakeThread::default());
-
-            let thread = {
-                let fake_thread = Arc::clone(&fake_thread);
-
-                thread::spawn(move || {
-                    fake_thread.ctl.set_allowset(!0);
-                    {
-                        let _g = fake_thread.ctxt.lock();
-                        if fake_thread
-                            .ctl
-                            .currently_pending_unblocked(&fake_thread.pctl)
-                            == 0
-                        {
-                            drop(_g);
-                            thread::park();
-                        }
-                    }
-                })
-            };
-
-            for sig in 1..=64 {
-                let _g = fake_thread.ctxt.lock();
-
-                let idx = sig - 1;
-                let bit = 1 << (idx % 32);
-
-                fake_thread.ctl.word[idx / 32].fetch_or(bit, Ordering::Relaxed);
-                let w = fake_thread.ctl.word[idx / 32].load(Ordering::Relaxed);
-
-                if w & (w >> 32) != 0 {
-                    thread.thread().unpark();
-                }
-            }
-
-            thread.join().unwrap();
-        });
-    }
-}