Add 'init/' from commit '0e7a0d3ab46817915180adbbb775c76d67fee31c'
git-subtree-dir: init git-subtree-mainline:57f2dca267git-subtree-split:0e7a0d3ab4
This commit is contained in:
bjorn3
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/target/
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Generated
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# This file is automatically @generated by Cargo.
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# It is not intended for manual editing.
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version = 3
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[[package]]
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name = "bitflags"
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version = "2.6.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "b048fb63fd8b5923fc5aa7b340d8e156aec7ec02f0c78fa8a6ddc2613f6f71de"
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[[package]]
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name = "init"
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version = "0.1.0"
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dependencies = [
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"libredox",
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]
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[[package]]
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name = "libc"
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version = "0.2.159"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "561d97a539a36e26a9a5fad1ea11a3039a67714694aaa379433e580854bc3dc5"
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[[package]]
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name = "libredox"
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version = "0.1.3"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "c0ff37bd590ca25063e35af745c343cb7a0271906fb7b37e4813e8f79f00268d"
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dependencies = [
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"bitflags",
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"libc",
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"redox_syscall",
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]
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[[package]]
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name = "redox_syscall"
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version = "0.5.7"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "9b6dfecf2c74bce2466cabf93f6664d6998a69eb21e39f4207930065b27b771f"
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dependencies = [
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"bitflags",
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]
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[package]
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name = "init"
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version = "0.1.0"
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edition = "2021"
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license = "MIT"
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[dependencies]
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libredox = "0.1"
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MIT License
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Copyright (c) 2017 Redox OS
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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# RedoxOS init
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This repository contains the init system for RedoxOS.
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Init is currently being rewritten to support a couple of behaviors that are helpful for running a configurable and robust system. These include:
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- Dependency relationships between services
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- Parallel service startup and shutdown
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- Configuration files for each service, including:
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- Dependencies
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- Methods
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- TODO: Users/Groups for services
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- TODO: Scheme namespaces for services
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- Service management
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- Enable and disable services
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- Restart failed services
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## How To Contribute
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To learn how to contribute to this system component you need to read the following document:
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- [CONTRIBUTING.md](https://gitlab.redox-os.org/redox-os/redox/-/blob/master/CONTRIBUTING.md)
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## Development
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To learn how to do development with this system component inside the Redox build system you need to read the [Build System](https://doc.redox-os.org/book/build-system-reference.html) and [Coding and Building](https://doc.redox-os.org/book/coding-and-building.html) pages.
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### How To Build
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To build this system component you need to download the Redox build system, you can learn how to do it on the [Building Redox](https://doc.redox-os.org/book/podman-build.html) page.
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This is necessary because they only work with cross-compilation to a Redox virtual machine, but you can do some testing from Linux.
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use std::collections::BTreeMap;
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use std::env;
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use std::ffi::CString;
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use std::fs::{read_dir, File};
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use std::io::{BufRead, BufReader, Result, Write};
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use std::path::Path;
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use std::process::Command;
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use libredox::error::Error as OsError;
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use libredox::flag::{O_RDONLY, O_WRONLY};
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fn set_default_scheme(scheme: &str) -> std::result::Result<(), OsError> {
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use std::ffi::{c_char, c_int};
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extern "C" {
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fn set_default_scheme(scheme: *const c_char) -> c_int;
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}
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let cstr =
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CString::new(scheme.as_bytes()).expect(&format!("init: invalid default scheme {}", scheme));
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let res = unsafe { set_default_scheme(cstr.as_ptr()) };
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match res {
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0 => Ok(()),
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error_code => Err(OsError::new(error_code)),
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}
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}
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fn switch_stdio(stdio: &str) -> Result<()> {
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let stdin = libredox::Fd::open(stdio, O_RDONLY, 0)?;
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let stdout = libredox::Fd::open(stdio, O_WRONLY, 0)?;
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let stderr = libredox::Fd::open(stdio, O_WRONLY, 0)?;
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stdin.dup2(0, &[])?;
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stdout.dup2(1, &[])?;
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stderr.dup2(2, &[])?;
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Ok(())
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}
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pub fn run(file: &Path) -> Result<()> {
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let file = File::open(file)?;
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let reader = BufReader::new(file);
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for line_res in reader.lines() {
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let line_raw = line_res?;
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let line = line_raw.trim();
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if !line.is_empty() && !line.starts_with('#') {
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let mut args = line.split(' ').map(|arg| {
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if arg.starts_with('$') {
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env::var(&arg[1..]).unwrap_or(String::new())
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} else {
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arg.to_string()
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}
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});
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if let Some(cmd) = args.next() {
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match cmd.as_str() {
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"cd" => {
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if let Some(dir) = args.next() {
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if let Err(err) = env::set_current_dir(&dir) {
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println!("init: failed to cd to '{}': {}", dir, err);
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}
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} else {
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println!("init: failed to cd: no argument");
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}
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}
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"set-default-scheme" => {
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if let Some(scheme) = args.next() {
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if let Err(err) = set_default_scheme(&scheme) {
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println!(
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"init: failed to set default scheme to '{}': {}",
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scheme, err
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);
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}
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} else {
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println!("init: failed to set default scheme: no argument");
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}
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}
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"echo" => {
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if let Some(arg) = args.next() {
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print!("{}", arg);
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}
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for arg in args {
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print!(" {}", arg);
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}
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print!("\n");
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}
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"export" => {
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if let Some(var) = args.next() {
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let mut value = String::new();
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if let Some(arg) = args.next() {
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value.push_str(&arg);
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}
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for arg in args {
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value.push(' ');
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value.push_str(&arg);
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}
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env::set_var(var, value);
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} else {
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println!("init: failed to export: no argument");
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}
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}
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"run" => {
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if let Some(new_file) = args.next() {
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if let Err(err) = run(&Path::new(&new_file)) {
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println!("init: failed to run '{}': {}", new_file, err);
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}
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} else {
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println!("init: failed to run: no argument");
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}
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}
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"run.d" => {
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// This must be a BTreeMap to iterate in sorted order.
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let mut entries = BTreeMap::new();
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let mut missing_arg = true;
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for new_dir in args {
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if !Path::new(&new_dir).exists() {
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// Skip non-existent dirs
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continue;
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}
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missing_arg = false;
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match read_dir(&new_dir) {
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Ok(list) => {
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for entry_res in list {
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match entry_res {
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Ok(entry) => {
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// This intentionally overwrites older entries with
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// the same filename to allow overriding entries in
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// one search dir with those in a later search dir.
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entries.insert(entry.file_name(), entry.path());
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}
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Err(err) => {
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println!(
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"init: failed to run.d: '{}': {}",
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new_dir, err
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);
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}
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}
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}
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}
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Err(err) => {
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println!("init: failed to run.d: '{}': {}", new_dir, err);
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}
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}
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}
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if missing_arg {
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println!(
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"init: failed to run.d: no argument or all dirs are non-existent"
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);
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} else {
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// This takes advantage of BTreeMap iterating in sorted order.
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for (_, entry_path) in entries {
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if let Err(err) = run(&entry_path) {
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println!(
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"init: failed to run '{}': {}",
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entry_path.display(),
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err
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);
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}
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}
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}
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}
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"stdio" => {
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if let Some(stdio) = args.next() {
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if let Err(err) = switch_stdio(&stdio) {
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println!("init: failed to switch stdio to '{}': {}", stdio, err);
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}
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} else {
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println!("init: failed to set stdio: no argument");
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}
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}
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"unset" => {
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for arg in args {
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env::remove_var(&arg);
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}
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}
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_ => {
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let mut command = Command::new(cmd.clone());
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for arg in args {
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command.arg(arg);
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}
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match command.spawn() {
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Ok(child) => match child.wait_with_output() {
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Ok(output) => {
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std::io::stdout()
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.write_all(output.stdout.as_slice())
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.unwrap();
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std::io::stderr()
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.write_all(output.stderr.as_slice())
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.unwrap();
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println!("{cmd} done.");
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}
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Err(err) => {
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println!("init: failed to wait for '{}': {}", line, err)
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}
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},
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Err(err) => println!("init: failed to execute '{}': {}", line, err),
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}
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}
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}
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}
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}
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}
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Ok(())
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}
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pub fn main() {
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if let Err(err) = set_default_scheme("initfs") {
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println!("init: failed to set default scheme: {}", err);
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}
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let config = "/etc/init.rc";
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if let Err(err) = run(&Path::new(config)) {
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println!("init: failed to run {}: {}", config, err);
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}
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libredox::call::setrens(0, 0).expect("init: failed to enter null namespace");
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loop {
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let mut status = 0;
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libredox::call::waitpid(0, &mut status, 0).unwrap();
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}
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}
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Reference in New Issue
Block a user