Simplify relibc test recipe replay

local/patches/relibc/redox.patch

@@ -65,186 +65,3 @@ index 9a3978dc..906ad525 100644
  
  // Defined for compatibility
  pub const O_NDELAY: c_int = O_NONBLOCK;
-diff --git a/src/header/mod.rs b/src/header/mod.rs
-index d3a7ba75..4cdc9f1d 100644
---- a/src/header/mod.rs
-+++ b/src/header/mod.rs
-@@ -2,6 +2,7 @@
- 
- pub mod _aio;
- pub mod _fenv;
-+pub mod arpa_nameser;
- pub mod arpa_inet;
- pub mod assert;
- pub mod bits_arpainet;
-@@ -66,6 +67,7 @@ pub mod pty;
- pub mod pwd;
- // TODO: re_comp.h (deprecated)
- pub mod regex;
-+pub mod resolv;
- // TODO: regexp.h (deprecated)
- pub mod sched;
- // TODO: search.h
-diff --git a/src/header/arpa_nameser/cbindgen.toml b/src/header/arpa_nameser/cbindgen.toml
-new file mode 100644
---- /dev/null
-+++ b/src/header/arpa_nameser/cbindgen.toml
-@@ -0,0 +1,9 @@
-+sys_includes = ["sys/types.h", "stdint.h"]
-+include_guard = "_ARPA_NAMESER_H"
-+trailer = """
-+typedef struct HEADER HEADER;
-+"""
-+language = "C"
-+style = "Tag"
-+no_includes = true
-+cpp_compat = true
-diff --git a/src/header/arpa_nameser/mod.rs b/src/header/arpa_nameser/mod.rs
-new file mode 100644
---- /dev/null
-+++ b/src/header/arpa_nameser/mod.rs
-@@ -0,0 +1,74 @@
-+//! `arpa/nameser.h` compatibility surface.
-+
-+use crate::{
-+    header::errno::EINVAL,
-+    platform::{
-+        ERRNO,
-+        types::{c_char, c_int, c_uchar},
-+    },
-+};
-+
-+pub const HFIXEDSZ: c_int = 12;
-+pub const MAXDNAME: c_int = 256;
-+
-+#[repr(C)]
-+#[derive(Clone, Copy, Default)]
-+#[allow(non_camel_case_types)]
-+pub struct HEADER {
-+    pub id: u16,
-+    pub flags: u16,
-+    pub qdcount: u16,
-+    pub ancount: u16,
-+    pub nscount: u16,
-+    pub arcount: u16,
-+}
-+
-+#[unsafe(no_mangle)]
-+pub extern "C" fn _cbindgen_export_nameser_header(header: HEADER) {
-+    let _ = header;
-+}
-+
-+#[unsafe(no_mangle)]
-+pub unsafe extern "C" fn dn_expand(
-+    msg: *const c_uchar,
-+    eomorig: *const c_uchar,
-+    comp_dn: *const c_uchar,
-+    exp_dn: *mut c_char,
-+    length: c_int,
-+) -> c_int {
-+    if msg.is_null() || eomorig.is_null() || comp_dn.is_null() || exp_dn.is_null() || length <= 0 {
-+        ERRNO.set(EINVAL);
-+        return -1;
-+    }
-+
-+    let mut src = comp_dn;
-+    let mut out = exp_dn.cast::<u8>();
-+    let end = unsafe { exp_dn.add(length as usize) }.cast::<u8>();
-+    let mut consumed: isize = 0;
-+    let mut first = true;
-+
-+    loop {
-+        if src >= eomorig {
-+            ERRNO.set(EINVAL);
-+            return -1;
-+        }
-+        let len = unsafe { *src };
-+        src = unsafe { src.add(1) };
-+        consumed += 1;
-+        if len == 0 {
-+            if out >= end { ERRNO.set(EINVAL); return -1; }
-+            unsafe { *out = 0 };
-+            return consumed as c_int;
-+        }
-+        if len & 0xC0 != 0 { ERRNO.set(EINVAL); return -1; }
-+        if !first {
-+            if out >= end { ERRNO.set(EINVAL); return -1; }
-+            unsafe { *out = b'.' };
-+            out = unsafe { out.add(1) };
-+        }
-+        first = false;
-+        if unsafe { src.add(len as usize) } > eomorig || unsafe { out.add(len as usize) } >= end { ERRNO.set(EINVAL); return -1; }
-+        unsafe { core::ptr::copy_nonoverlapping(src, out, len as usize); out = out.add(len as usize); src = src.add(len as usize); }
-+        consumed += len as isize;
-+    }
-+}
-diff --git a/src/header/resolv/cbindgen.toml b/src/header/resolv/cbindgen.toml
-new file mode 100644
---- /dev/null
-+++ b/src/header/resolv/cbindgen.toml
-@@ -0,0 +1,6 @@
-+sys_includes = ["sys/types.h", "netdb.h"]
-+include_guard = "_RESOLV_H"
-+language = "C"
-+style = "Tag"
-+no_includes = true
-+cpp_compat = true
-diff --git a/src/header/resolv/mod.rs b/src/header/resolv/mod.rs
-new file mode 100644
---- /dev/null
-+++ b/src/header/resolv/mod.rs
-@@ -0,0 +1,54 @@
-+//! `resolv.h` bounded compatibility surface.
-+
-+use crate::{
-+    header::{arpa_nameser::dn_expand, errno::ENOSYS, netdb},
-+    platform::{
-+        ERRNO,
-+        types::{c_char, c_int, c_uchar},
-+    },
-+};
-+
-+pub const RES_INIT: c_int = 0x0000_0001;
-+pub const RES_DEBUG: c_int = 0x0000_0002;
-+pub const RES_USE_EDNS0: c_int = 0x0008_0000;
-+pub const RES_USE_DNSSEC: c_int = 0x0010_0000;
-+
-+#[repr(C)]
-+#[derive(Clone, Copy, Default)]
-+#[allow(non_camel_case_types)]
-+pub struct __res_state {
-+    pub options: c_int,
-+}
-+
-+pub type res_state = *mut __res_state;
-+
-+#[unsafe(no_mangle)]
-+pub static mut _res: __res_state = __res_state { options: 0 };
-+
-+#[unsafe(no_mangle)]
-+pub extern "C" fn _cbindgen_export_res_state(state: __res_state) {
-+    let _ = state;
-+}
-+
-+#[unsafe(no_mangle)]
-+pub unsafe extern "C" fn res_init() -> c_int {
-+    unsafe { _res.options |= RES_INIT; }
-+    0
-+}
-+
-+#[unsafe(no_mangle)]
-+pub unsafe extern "C" fn res_query(_dname: *const c_char, _class: c_int, _rtype: c_int, _answer: *mut c_uchar, _anslen: c_int) -> c_int {
-+    netdb::H_ERRNO.set(netdb::NO_DATA);
-+    ERRNO.set(ENOSYS);
-+    -1
-+}
-+
-+#[unsafe(no_mangle)]
-+pub unsafe extern "C" fn res_search(dname: *const c_char, class: c_int, rtype: c_int, answer: *mut c_uchar, anslen: c_int) -> c_int {
-+    unsafe { res_query(dname, class, rtype, answer, anslen) }
-+}
-+
-+#[unsafe(no_mangle)]
-+pub unsafe extern "C" fn __dn_expand(msg: *const c_uchar, eomorig: *const c_uchar, comp_dn: *const c_uchar, exp_dn: *mut c_char, length: c_int) -> c_int {
-+    unsafe { dn_expand(msg, eomorig, comp_dn, exp_dn, length) }
-+}