summaryrefslogtreecommitdiffstats
path: root/library/std/src/sys/unix/os
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--library/std/src/sys/unix/os.rs680
-rw-r--r--library/std/src/sys/unix/os/tests.rs23
-rw-r--r--library/std/src/sys/unix/os_str.rs266
-rw-r--r--library/std/src/sys/unix/os_str/tests.rs10
4 files changed, 979 insertions, 0 deletions
diff --git a/library/std/src/sys/unix/os.rs b/library/std/src/sys/unix/os.rs
new file mode 100644
index 000000000..46545a083
--- /dev/null
+++ b/library/std/src/sys/unix/os.rs
@@ -0,0 +1,680 @@
+//! Implementation of `std::os` functionality for unix systems
+
+#![allow(unused_imports)] // lots of cfg code here
+
+#[cfg(test)]
+mod tests;
+
+use crate::os::unix::prelude::*;
+
+use crate::error::Error as StdError;
+use crate::ffi::{CStr, CString, OsStr, OsString};
+use crate::fmt;
+use crate::io;
+use crate::iter;
+use crate::mem;
+use crate::path::{self, PathBuf};
+use crate::ptr;
+use crate::slice;
+use crate::str;
+use crate::sys::cvt;
+use crate::sys::fd;
+use crate::sys::memchr;
+use crate::sys_common::rwlock::{StaticRwLock, StaticRwLockReadGuard};
+use crate::vec;
+
+#[cfg(all(target_env = "gnu", not(target_os = "vxworks")))]
+use crate::sys::weak::weak;
+
+use libc::{c_char, c_int, c_void};
+
+const TMPBUF_SZ: usize = 128;
+
+cfg_if::cfg_if! {
+ if #[cfg(target_os = "redox")] {
+ const PATH_SEPARATOR: u8 = b';';
+ } else {
+ const PATH_SEPARATOR: u8 = b':';
+ }
+}
+
+extern "C" {
+ #[cfg(not(any(target_os = "dragonfly", target_os = "vxworks")))]
+ #[cfg_attr(
+ any(
+ target_os = "linux",
+ target_os = "emscripten",
+ target_os = "fuchsia",
+ target_os = "l4re"
+ ),
+ link_name = "__errno_location"
+ )]
+ #[cfg_attr(
+ any(
+ target_os = "netbsd",
+ target_os = "openbsd",
+ target_os = "android",
+ target_os = "redox",
+ target_env = "newlib"
+ ),
+ link_name = "__errno"
+ )]
+ #[cfg_attr(any(target_os = "solaris", target_os = "illumos"), link_name = "___errno")]
+ #[cfg_attr(
+ any(target_os = "macos", target_os = "ios", target_os = "freebsd", target_os = "watchos"),
+ link_name = "__error"
+ )]
+ #[cfg_attr(target_os = "haiku", link_name = "_errnop")]
+ fn errno_location() -> *mut c_int;
+}
+
+/// Returns the platform-specific value of errno
+#[cfg(not(any(target_os = "dragonfly", target_os = "vxworks")))]
+pub fn errno() -> i32 {
+ unsafe { (*errno_location()) as i32 }
+}
+
+/// Sets the platform-specific value of errno
+#[cfg(all(not(target_os = "dragonfly"), not(target_os = "vxworks")))] // needed for readdir and syscall!
+#[allow(dead_code)] // but not all target cfgs actually end up using it
+pub fn set_errno(e: i32) {
+ unsafe { *errno_location() = e as c_int }
+}
+
+#[cfg(target_os = "vxworks")]
+pub fn errno() -> i32 {
+ unsafe { libc::errnoGet() }
+}
+
+#[cfg(target_os = "dragonfly")]
+pub fn errno() -> i32 {
+ extern "C" {
+ #[thread_local]
+ static errno: c_int;
+ }
+
+ unsafe { errno as i32 }
+}
+
+#[cfg(target_os = "dragonfly")]
+#[allow(dead_code)]
+pub fn set_errno(e: i32) {
+ extern "C" {
+ #[thread_local]
+ static mut errno: c_int;
+ }
+
+ unsafe {
+ errno = e;
+ }
+}
+
+/// Gets a detailed string description for the given error number.
+pub fn error_string(errno: i32) -> String {
+ extern "C" {
+ #[cfg_attr(any(target_os = "linux", target_env = "newlib"), link_name = "__xpg_strerror_r")]
+ fn strerror_r(errnum: c_int, buf: *mut c_char, buflen: libc::size_t) -> c_int;
+ }
+
+ let mut buf = [0 as c_char; TMPBUF_SZ];
+
+ let p = buf.as_mut_ptr();
+ unsafe {
+ if strerror_r(errno as c_int, p, buf.len()) < 0 {
+ panic!("strerror_r failure");
+ }
+
+ let p = p as *const _;
+ str::from_utf8(CStr::from_ptr(p).to_bytes()).unwrap().to_owned()
+ }
+}
+
+#[cfg(target_os = "espidf")]
+pub fn getcwd() -> io::Result<PathBuf> {
+ Ok(PathBuf::from("/"))
+}
+
+#[cfg(not(target_os = "espidf"))]
+pub fn getcwd() -> io::Result<PathBuf> {
+ let mut buf = Vec::with_capacity(512);
+ loop {
+ unsafe {
+ let ptr = buf.as_mut_ptr() as *mut libc::c_char;
+ if !libc::getcwd(ptr, buf.capacity()).is_null() {
+ let len = CStr::from_ptr(buf.as_ptr() as *const libc::c_char).to_bytes().len();
+ buf.set_len(len);
+ buf.shrink_to_fit();
+ return Ok(PathBuf::from(OsString::from_vec(buf)));
+ } else {
+ let error = io::Error::last_os_error();
+ if error.raw_os_error() != Some(libc::ERANGE) {
+ return Err(error);
+ }
+ }
+
+ // Trigger the internal buffer resizing logic of `Vec` by requiring
+ // more space than the current capacity.
+ let cap = buf.capacity();
+ buf.set_len(cap);
+ buf.reserve(1);
+ }
+ }
+}
+
+#[cfg(target_os = "espidf")]
+pub fn chdir(p: &path::Path) -> io::Result<()> {
+ super::unsupported::unsupported()
+}
+
+#[cfg(not(target_os = "espidf"))]
+pub fn chdir(p: &path::Path) -> io::Result<()> {
+ let p: &OsStr = p.as_ref();
+ let p = CString::new(p.as_bytes())?;
+ if unsafe { libc::chdir(p.as_ptr()) } != 0 {
+ return Err(io::Error::last_os_error());
+ }
+ Ok(())
+}
+
+pub struct SplitPaths<'a> {
+ iter: iter::Map<slice::Split<'a, u8, fn(&u8) -> bool>, fn(&'a [u8]) -> PathBuf>,
+}
+
+pub fn split_paths(unparsed: &OsStr) -> SplitPaths<'_> {
+ fn bytes_to_path(b: &[u8]) -> PathBuf {
+ PathBuf::from(<OsStr as OsStrExt>::from_bytes(b))
+ }
+ fn is_separator(b: &u8) -> bool {
+ *b == PATH_SEPARATOR
+ }
+ let unparsed = unparsed.as_bytes();
+ SplitPaths {
+ iter: unparsed
+ .split(is_separator as fn(&u8) -> bool)
+ .map(bytes_to_path as fn(&[u8]) -> PathBuf),
+ }
+}
+
+impl<'a> Iterator for SplitPaths<'a> {
+ type Item = PathBuf;
+ fn next(&mut self) -> Option<PathBuf> {
+ self.iter.next()
+ }
+ fn size_hint(&self) -> (usize, Option<usize>) {
+ self.iter.size_hint()
+ }
+}
+
+#[derive(Debug)]
+pub struct JoinPathsError;
+
+pub fn join_paths<I, T>(paths: I) -> Result<OsString, JoinPathsError>
+where
+ I: Iterator<Item = T>,
+ T: AsRef<OsStr>,
+{
+ let mut joined = Vec::new();
+
+ for (i, path) in paths.enumerate() {
+ let path = path.as_ref().as_bytes();
+ if i > 0 {
+ joined.push(PATH_SEPARATOR)
+ }
+ if path.contains(&PATH_SEPARATOR) {
+ return Err(JoinPathsError);
+ }
+ joined.extend_from_slice(path);
+ }
+ Ok(OsStringExt::from_vec(joined))
+}
+
+impl fmt::Display for JoinPathsError {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ write!(f, "path segment contains separator `{}`", char::from(PATH_SEPARATOR))
+ }
+}
+
+impl StdError for JoinPathsError {
+ #[allow(deprecated)]
+ fn description(&self) -> &str {
+ "failed to join paths"
+ }
+}
+
+#[cfg(any(target_os = "freebsd", target_os = "dragonfly"))]
+pub fn current_exe() -> io::Result<PathBuf> {
+ unsafe {
+ let mut mib = [
+ libc::CTL_KERN as c_int,
+ libc::KERN_PROC as c_int,
+ libc::KERN_PROC_PATHNAME as c_int,
+ -1 as c_int,
+ ];
+ let mut sz = 0;
+ cvt(libc::sysctl(
+ mib.as_mut_ptr(),
+ mib.len() as libc::c_uint,
+ ptr::null_mut(),
+ &mut sz,
+ ptr::null_mut(),
+ 0,
+ ))?;
+ if sz == 0 {
+ return Err(io::Error::last_os_error());
+ }
+ let mut v: Vec<u8> = Vec::with_capacity(sz);
+ cvt(libc::sysctl(
+ mib.as_mut_ptr(),
+ mib.len() as libc::c_uint,
+ v.as_mut_ptr() as *mut libc::c_void,
+ &mut sz,
+ ptr::null_mut(),
+ 0,
+ ))?;
+ if sz == 0 {
+ return Err(io::Error::last_os_error());
+ }
+ v.set_len(sz - 1); // chop off trailing NUL
+ Ok(PathBuf::from(OsString::from_vec(v)))
+ }
+}
+
+#[cfg(target_os = "netbsd")]
+pub fn current_exe() -> io::Result<PathBuf> {
+ fn sysctl() -> io::Result<PathBuf> {
+ unsafe {
+ let mib = [libc::CTL_KERN, libc::KERN_PROC_ARGS, -1, libc::KERN_PROC_PATHNAME];
+ let mut path_len: usize = 0;
+ cvt(libc::sysctl(
+ mib.as_ptr(),
+ mib.len() as libc::c_uint,
+ ptr::null_mut(),
+ &mut path_len,
+ ptr::null(),
+ 0,
+ ))?;
+ if path_len <= 1 {
+ return Err(io::const_io_error!(
+ io::ErrorKind::Uncategorized,
+ "KERN_PROC_PATHNAME sysctl returned zero-length string",
+ ));
+ }
+ let mut path: Vec<u8> = Vec::with_capacity(path_len);
+ cvt(libc::sysctl(
+ mib.as_ptr(),
+ mib.len() as libc::c_uint,
+ path.as_ptr() as *mut libc::c_void,
+ &mut path_len,
+ ptr::null(),
+ 0,
+ ))?;
+ path.set_len(path_len - 1); // chop off NUL
+ Ok(PathBuf::from(OsString::from_vec(path)))
+ }
+ }
+ fn procfs() -> io::Result<PathBuf> {
+ let curproc_exe = path::Path::new("/proc/curproc/exe");
+ if curproc_exe.is_file() {
+ return crate::fs::read_link(curproc_exe);
+ }
+ Err(io::const_io_error!(
+ io::ErrorKind::Uncategorized,
+ "/proc/curproc/exe doesn't point to regular file.",
+ ))
+ }
+ sysctl().or_else(|_| procfs())
+}
+
+#[cfg(target_os = "openbsd")]
+pub fn current_exe() -> io::Result<PathBuf> {
+ unsafe {
+ let mut mib = [libc::CTL_KERN, libc::KERN_PROC_ARGS, libc::getpid(), libc::KERN_PROC_ARGV];
+ let mib = mib.as_mut_ptr();
+ let mut argv_len = 0;
+ cvt(libc::sysctl(mib, 4, ptr::null_mut(), &mut argv_len, ptr::null_mut(), 0))?;
+ let mut argv = Vec::<*const libc::c_char>::with_capacity(argv_len as usize);
+ cvt(libc::sysctl(mib, 4, argv.as_mut_ptr() as *mut _, &mut argv_len, ptr::null_mut(), 0))?;
+ argv.set_len(argv_len as usize);
+ if argv[0].is_null() {
+ return Err(io::const_io_error!(
+ io::ErrorKind::Uncategorized,
+ "no current exe available",
+ ));
+ }
+ let argv0 = CStr::from_ptr(argv[0]).to_bytes();
+ if argv0[0] == b'.' || argv0.iter().any(|b| *b == b'/') {
+ crate::fs::canonicalize(OsStr::from_bytes(argv0))
+ } else {
+ Ok(PathBuf::from(OsStr::from_bytes(argv0)))
+ }
+ }
+}
+
+#[cfg(any(target_os = "linux", target_os = "android", target_os = "emscripten"))]
+pub fn current_exe() -> io::Result<PathBuf> {
+ match crate::fs::read_link("/proc/self/exe") {
+ Err(ref e) if e.kind() == io::ErrorKind::NotFound => Err(io::const_io_error!(
+ io::ErrorKind::Uncategorized,
+ "no /proc/self/exe available. Is /proc mounted?",
+ )),
+ other => other,
+ }
+}
+
+#[cfg(any(target_os = "macos", target_os = "ios", target_os = "watchos"))]
+pub fn current_exe() -> io::Result<PathBuf> {
+ unsafe {
+ let mut sz: u32 = 0;
+ libc::_NSGetExecutablePath(ptr::null_mut(), &mut sz);
+ if sz == 0 {
+ return Err(io::Error::last_os_error());
+ }
+ let mut v: Vec<u8> = Vec::with_capacity(sz as usize);
+ let err = libc::_NSGetExecutablePath(v.as_mut_ptr() as *mut i8, &mut sz);
+ if err != 0 {
+ return Err(io::Error::last_os_error());
+ }
+ v.set_len(sz as usize - 1); // chop off trailing NUL
+ Ok(PathBuf::from(OsString::from_vec(v)))
+ }
+}
+
+#[cfg(any(target_os = "solaris", target_os = "illumos"))]
+pub fn current_exe() -> io::Result<PathBuf> {
+ if let Ok(path) = crate::fs::read_link("/proc/self/path/a.out") {
+ Ok(path)
+ } else {
+ unsafe {
+ let path = libc::getexecname();
+ if path.is_null() {
+ Err(io::Error::last_os_error())
+ } else {
+ let filename = CStr::from_ptr(path).to_bytes();
+ let path = PathBuf::from(<OsStr as OsStrExt>::from_bytes(filename));
+
+ // Prepend a current working directory to the path if
+ // it doesn't contain an absolute pathname.
+ if filename[0] == b'/' { Ok(path) } else { getcwd().map(|cwd| cwd.join(path)) }
+ }
+ }
+ }
+}
+
+#[cfg(target_os = "haiku")]
+pub fn current_exe() -> io::Result<PathBuf> {
+ unsafe {
+ let mut info: mem::MaybeUninit<libc::image_info> = mem::MaybeUninit::uninit();
+ let mut cookie: i32 = 0;
+ // the executable can be found at team id 0
+ let result = libc::_get_next_image_info(
+ 0,
+ &mut cookie,
+ info.as_mut_ptr(),
+ mem::size_of::<libc::image_info>(),
+ );
+ if result != 0 {
+ use crate::io::ErrorKind;
+ Err(io::const_io_error!(ErrorKind::Uncategorized, "Error getting executable path"))
+ } else {
+ let name = CStr::from_ptr((*info.as_ptr()).name.as_ptr()).to_bytes();
+ Ok(PathBuf::from(OsStr::from_bytes(name)))
+ }
+ }
+}
+
+#[cfg(target_os = "redox")]
+pub fn current_exe() -> io::Result<PathBuf> {
+ crate::fs::read_to_string("sys:exe").map(PathBuf::from)
+}
+
+#[cfg(target_os = "l4re")]
+pub fn current_exe() -> io::Result<PathBuf> {
+ use crate::io::ErrorKind;
+ Err(io::const_io_error!(ErrorKind::Unsupported, "Not yet implemented!"))
+}
+
+#[cfg(target_os = "vxworks")]
+pub fn current_exe() -> io::Result<PathBuf> {
+ #[cfg(test)]
+ use realstd::env;
+
+ #[cfg(not(test))]
+ use crate::env;
+
+ let exe_path = env::args().next().unwrap();
+ let path = path::Path::new(&exe_path);
+ path.canonicalize()
+}
+
+#[cfg(any(target_os = "espidf", target_os = "horizon"))]
+pub fn current_exe() -> io::Result<PathBuf> {
+ super::unsupported::unsupported()
+}
+
+#[cfg(target_os = "fuchsia")]
+pub fn current_exe() -> io::Result<PathBuf> {
+ use crate::io::ErrorKind;
+
+ #[cfg(test)]
+ use realstd::env;
+
+ #[cfg(not(test))]
+ use crate::env;
+
+ let exe_path = env::args().next().ok_or(io::const_io_error!(
+ ErrorKind::Uncategorized,
+ "an executable path was not found because no arguments were provided through argv"
+ ))?;
+ let path = PathBuf::from(exe_path);
+
+ // Prepend the current working directory to the path if it's not absolute.
+ if !path.is_absolute() { getcwd().map(|cwd| cwd.join(path)) } else { Ok(path) }
+}
+
+pub struct Env {
+ iter: vec::IntoIter<(OsString, OsString)>,
+}
+
+impl !Send for Env {}
+impl !Sync for Env {}
+
+impl Iterator for Env {
+ type Item = (OsString, OsString);
+ fn next(&mut self) -> Option<(OsString, OsString)> {
+ self.iter.next()
+ }
+ fn size_hint(&self) -> (usize, Option<usize>) {
+ self.iter.size_hint()
+ }
+}
+
+#[cfg(target_os = "macos")]
+pub unsafe fn environ() -> *mut *const *const c_char {
+ libc::_NSGetEnviron() as *mut *const *const c_char
+}
+
+#[cfg(not(target_os = "macos"))]
+pub unsafe fn environ() -> *mut *const *const c_char {
+ extern "C" {
+ static mut environ: *const *const c_char;
+ }
+ ptr::addr_of_mut!(environ)
+}
+
+static ENV_LOCK: StaticRwLock = StaticRwLock::new();
+
+pub fn env_read_lock() -> StaticRwLockReadGuard {
+ ENV_LOCK.read()
+}
+
+/// Returns a vector of (variable, value) byte-vector pairs for all the
+/// environment variables of the current process.
+pub fn env() -> Env {
+ unsafe {
+ let _guard = env_read_lock();
+ let mut environ = *environ();
+ let mut result = Vec::new();
+ if !environ.is_null() {
+ while !(*environ).is_null() {
+ if let Some(key_value) = parse(CStr::from_ptr(*environ).to_bytes()) {
+ result.push(key_value);
+ }
+ environ = environ.add(1);
+ }
+ }
+ return Env { iter: result.into_iter() };
+ }
+
+ fn parse(input: &[u8]) -> Option<(OsString, OsString)> {
+ // Strategy (copied from glibc): Variable name and value are separated
+ // by an ASCII equals sign '='. Since a variable name must not be
+ // empty, allow variable names starting with an equals sign. Skip all
+ // malformed lines.
+ if input.is_empty() {
+ return None;
+ }
+ let pos = memchr::memchr(b'=', &input[1..]).map(|p| p + 1);
+ pos.map(|p| {
+ (
+ OsStringExt::from_vec(input[..p].to_vec()),
+ OsStringExt::from_vec(input[p + 1..].to_vec()),
+ )
+ })
+ }
+}
+
+pub fn getenv(k: &OsStr) -> Option<OsString> {
+ // environment variables with a nul byte can't be set, so their value is
+ // always None as well
+ let k = CString::new(k.as_bytes()).ok()?;
+ unsafe {
+ let _guard = env_read_lock();
+ let s = libc::getenv(k.as_ptr()) as *const libc::c_char;
+ if s.is_null() {
+ None
+ } else {
+ Some(OsStringExt::from_vec(CStr::from_ptr(s).to_bytes().to_vec()))
+ }
+ }
+}
+
+pub fn setenv(k: &OsStr, v: &OsStr) -> io::Result<()> {
+ let k = CString::new(k.as_bytes())?;
+ let v = CString::new(v.as_bytes())?;
+
+ unsafe {
+ let _guard = ENV_LOCK.write();
+ cvt(libc::setenv(k.as_ptr(), v.as_ptr(), 1)).map(drop)
+ }
+}
+
+pub fn unsetenv(n: &OsStr) -> io::Result<()> {
+ let nbuf = CString::new(n.as_bytes())?;
+
+ unsafe {
+ let _guard = ENV_LOCK.write();
+ cvt(libc::unsetenv(nbuf.as_ptr())).map(drop)
+ }
+}
+
+#[cfg(not(target_os = "espidf"))]
+pub fn page_size() -> usize {
+ unsafe { libc::sysconf(libc::_SC_PAGESIZE) as usize }
+}
+
+pub fn temp_dir() -> PathBuf {
+ crate::env::var_os("TMPDIR").map(PathBuf::from).unwrap_or_else(|| {
+ if cfg!(target_os = "android") {
+ PathBuf::from("/data/local/tmp")
+ } else {
+ PathBuf::from("/tmp")
+ }
+ })
+}
+
+pub fn home_dir() -> Option<PathBuf> {
+ return crate::env::var_os("HOME").or_else(|| unsafe { fallback() }).map(PathBuf::from);
+
+ #[cfg(any(
+ target_os = "android",
+ target_os = "ios",
+ target_os = "watchos",
+ target_os = "emscripten",
+ target_os = "redox",
+ target_os = "vxworks",
+ target_os = "espidf",
+ target_os = "horizon"
+ ))]
+ unsafe fn fallback() -> Option<OsString> {
+ None
+ }
+ #[cfg(not(any(
+ target_os = "android",
+ target_os = "ios",
+ target_os = "watchos",
+ target_os = "emscripten",
+ target_os = "redox",
+ target_os = "vxworks",
+ target_os = "espidf",
+ target_os = "horizon"
+ )))]
+ unsafe fn fallback() -> Option<OsString> {
+ let amt = match libc::sysconf(libc::_SC_GETPW_R_SIZE_MAX) {
+ n if n < 0 => 512 as usize,
+ n => n as usize,
+ };
+ let mut buf = Vec::with_capacity(amt);
+ let mut passwd: libc::passwd = mem::zeroed();
+ let mut result = ptr::null_mut();
+ match libc::getpwuid_r(
+ libc::getuid(),
+ &mut passwd,
+ buf.as_mut_ptr(),
+ buf.capacity(),
+ &mut result,
+ ) {
+ 0 if !result.is_null() => {
+ let ptr = passwd.pw_dir as *const _;
+ let bytes = CStr::from_ptr(ptr).to_bytes().to_vec();
+ Some(OsStringExt::from_vec(bytes))
+ }
+ _ => None,
+ }
+ }
+}
+
+pub fn exit(code: i32) -> ! {
+ unsafe { libc::exit(code as c_int) }
+}
+
+pub fn getpid() -> u32 {
+ unsafe { libc::getpid() as u32 }
+}
+
+pub fn getppid() -> u32 {
+ unsafe { libc::getppid() as u32 }
+}
+
+#[cfg(all(target_os = "linux", target_env = "gnu"))]
+pub fn glibc_version() -> Option<(usize, usize)> {
+ extern "C" {
+ fn gnu_get_libc_version() -> *const libc::c_char;
+ }
+ let version_cstr = unsafe { CStr::from_ptr(gnu_get_libc_version()) };
+ if let Ok(version_str) = version_cstr.to_str() {
+ parse_glibc_version(version_str)
+ } else {
+ None
+ }
+}
+
+// Returns Some((major, minor)) if the string is a valid "x.y" version,
+// ignoring any extra dot-separated parts. Otherwise return None.
+#[cfg(all(target_os = "linux", target_env = "gnu"))]
+fn parse_glibc_version(version: &str) -> Option<(usize, usize)> {
+ let mut parsed_ints = version.split('.').map(str::parse::<usize>).fuse();
+ match (parsed_ints.next(), parsed_ints.next()) {
+ (Some(Ok(major)), Some(Ok(minor))) => Some((major, minor)),
+ _ => None,
+ }
+}
diff --git a/library/std/src/sys/unix/os/tests.rs b/library/std/src/sys/unix/os/tests.rs
new file mode 100644
index 000000000..efc29955b
--- /dev/null
+++ b/library/std/src/sys/unix/os/tests.rs
@@ -0,0 +1,23 @@
+#[test]
+#[cfg(all(target_os = "linux", target_env = "gnu"))]
+fn test_glibc_version() {
+ // This mostly just tests that the weak linkage doesn't panic wildly...
+ super::glibc_version();
+}
+
+#[test]
+#[cfg(all(target_os = "linux", target_env = "gnu"))]
+fn test_parse_glibc_version() {
+ let cases = [
+ ("0.0", Some((0, 0))),
+ ("01.+2", Some((1, 2))),
+ ("3.4.5.six", Some((3, 4))),
+ ("1", None),
+ ("1.-2", None),
+ ("1.foo", None),
+ ("foo.1", None),
+ ];
+ for &(version_str, parsed) in cases.iter() {
+ assert_eq!(parsed, super::parse_glibc_version(version_str));
+ }
+}
diff --git a/library/std/src/sys/unix/os_str.rs b/library/std/src/sys/unix/os_str.rs
new file mode 100644
index 000000000..ccbc18224
--- /dev/null
+++ b/library/std/src/sys/unix/os_str.rs
@@ -0,0 +1,266 @@
+//! The underlying OsString/OsStr implementation on Unix and many other
+//! systems: just a `Vec<u8>`/`[u8]`.
+
+use crate::borrow::Cow;
+use crate::collections::TryReserveError;
+use crate::fmt;
+use crate::fmt::Write;
+use crate::mem;
+use crate::rc::Rc;
+use crate::str;
+use crate::sync::Arc;
+use crate::sys_common::{AsInner, IntoInner};
+
+use core::str::lossy::{Utf8Lossy, Utf8LossyChunk};
+
+#[cfg(test)]
+#[path = "../unix/os_str/tests.rs"]
+mod tests;
+
+#[derive(Hash)]
+#[repr(transparent)]
+pub struct Buf {
+ pub inner: Vec<u8>,
+}
+
+#[repr(transparent)]
+pub struct Slice {
+ pub inner: [u8],
+}
+
+impl fmt::Debug for Slice {
+ fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
+ // Writes out a valid unicode string with the correct escape sequences
+
+ formatter.write_str("\"")?;
+ for Utf8LossyChunk { valid, broken } in Utf8Lossy::from_bytes(&self.inner).chunks() {
+ for c in valid.chars().flat_map(|c| c.escape_debug()) {
+ formatter.write_char(c)?
+ }
+
+ for b in broken {
+ write!(formatter, "\\x{:02X}", b)?;
+ }
+ }
+ formatter.write_str("\"")
+ }
+}
+
+impl fmt::Display for Slice {
+ fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
+ fmt::Display::fmt(&Utf8Lossy::from_bytes(&self.inner), formatter)
+ }
+}
+
+impl fmt::Debug for Buf {
+ fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
+ fmt::Debug::fmt(self.as_slice(), formatter)
+ }
+}
+
+impl fmt::Display for Buf {
+ fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
+ fmt::Display::fmt(self.as_slice(), formatter)
+ }
+}
+
+impl Clone for Buf {
+ #[inline]
+ fn clone(&self) -> Self {
+ Buf { inner: self.inner.clone() }
+ }
+
+ #[inline]
+ fn clone_from(&mut self, source: &Self) {
+ self.inner.clone_from(&source.inner)
+ }
+}
+
+impl IntoInner<Vec<u8>> for Buf {
+ fn into_inner(self) -> Vec<u8> {
+ self.inner
+ }
+}
+
+impl AsInner<[u8]> for Buf {
+ fn as_inner(&self) -> &[u8] {
+ &self.inner
+ }
+}
+
+impl Buf {
+ pub fn from_string(s: String) -> Buf {
+ Buf { inner: s.into_bytes() }
+ }
+
+ #[inline]
+ pub fn with_capacity(capacity: usize) -> Buf {
+ Buf { inner: Vec::with_capacity(capacity) }
+ }
+
+ #[inline]
+ pub fn clear(&mut self) {
+ self.inner.clear()
+ }
+
+ #[inline]
+ pub fn capacity(&self) -> usize {
+ self.inner.capacity()
+ }
+
+ #[inline]
+ pub fn reserve(&mut self, additional: usize) {
+ self.inner.reserve(additional)
+ }
+
+ #[inline]
+ pub fn try_reserve(&mut self, additional: usize) -> Result<(), TryReserveError> {
+ self.inner.try_reserve(additional)
+ }
+
+ #[inline]
+ pub fn reserve_exact(&mut self, additional: usize) {
+ self.inner.reserve_exact(additional)
+ }
+
+ #[inline]
+ pub fn try_reserve_exact(&mut self, additional: usize) -> Result<(), TryReserveError> {
+ self.inner.try_reserve_exact(additional)
+ }
+
+ #[inline]
+ pub fn shrink_to_fit(&mut self) {
+ self.inner.shrink_to_fit()
+ }
+
+ #[inline]
+ pub fn shrink_to(&mut self, min_capacity: usize) {
+ self.inner.shrink_to(min_capacity)
+ }
+
+ #[inline]
+ pub fn as_slice(&self) -> &Slice {
+ // SAFETY: Slice just wraps [u8],
+ // and &*self.inner is &[u8], therefore
+ // transmuting &[u8] to &Slice is safe.
+ unsafe { mem::transmute(&*self.inner) }
+ }
+
+ #[inline]
+ pub fn as_mut_slice(&mut self) -> &mut Slice {
+ // SAFETY: Slice just wraps [u8],
+ // and &mut *self.inner is &mut [u8], therefore
+ // transmuting &mut [u8] to &mut Slice is safe.
+ unsafe { mem::transmute(&mut *self.inner) }
+ }
+
+ pub fn into_string(self) -> Result<String, Buf> {
+ String::from_utf8(self.inner).map_err(|p| Buf { inner: p.into_bytes() })
+ }
+
+ pub fn push_slice(&mut self, s: &Slice) {
+ self.inner.extend_from_slice(&s.inner)
+ }
+
+ #[inline]
+ pub fn into_box(self) -> Box<Slice> {
+ unsafe { mem::transmute(self.inner.into_boxed_slice()) }
+ }
+
+ #[inline]
+ pub fn from_box(boxed: Box<Slice>) -> Buf {
+ let inner: Box<[u8]> = unsafe { mem::transmute(boxed) };
+ Buf { inner: inner.into_vec() }
+ }
+
+ #[inline]
+ pub fn into_arc(&self) -> Arc<Slice> {
+ self.as_slice().into_arc()
+ }
+
+ #[inline]
+ pub fn into_rc(&self) -> Rc<Slice> {
+ self.as_slice().into_rc()
+ }
+}
+
+impl Slice {
+ #[inline]
+ fn from_u8_slice(s: &[u8]) -> &Slice {
+ unsafe { mem::transmute(s) }
+ }
+
+ #[inline]
+ pub fn from_str(s: &str) -> &Slice {
+ Slice::from_u8_slice(s.as_bytes())
+ }
+
+ pub fn to_str(&self) -> Option<&str> {
+ str::from_utf8(&self.inner).ok()
+ }
+
+ pub fn to_string_lossy(&self) -> Cow<'_, str> {
+ String::from_utf8_lossy(&self.inner)
+ }
+
+ pub fn to_owned(&self) -> Buf {
+ Buf { inner: self.inner.to_vec() }
+ }
+
+ pub fn clone_into(&self, buf: &mut Buf) {
+ self.inner.clone_into(&mut buf.inner)
+ }
+
+ #[inline]
+ pub fn into_box(&self) -> Box<Slice> {
+ let boxed: Box<[u8]> = self.inner.into();
+ unsafe { mem::transmute(boxed) }
+ }
+
+ pub fn empty_box() -> Box<Slice> {
+ let boxed: Box<[u8]> = Default::default();
+ unsafe { mem::transmute(boxed) }
+ }
+
+ #[inline]
+ pub fn into_arc(&self) -> Arc<Slice> {
+ let arc: Arc<[u8]> = Arc::from(&self.inner);
+ unsafe { Arc::from_raw(Arc::into_raw(arc) as *const Slice) }
+ }
+
+ #[inline]
+ pub fn into_rc(&self) -> Rc<Slice> {
+ let rc: Rc<[u8]> = Rc::from(&self.inner);
+ unsafe { Rc::from_raw(Rc::into_raw(rc) as *const Slice) }
+ }
+
+ #[inline]
+ pub fn make_ascii_lowercase(&mut self) {
+ self.inner.make_ascii_lowercase()
+ }
+
+ #[inline]
+ pub fn make_ascii_uppercase(&mut self) {
+ self.inner.make_ascii_uppercase()
+ }
+
+ #[inline]
+ pub fn to_ascii_lowercase(&self) -> Buf {
+ Buf { inner: self.inner.to_ascii_lowercase() }
+ }
+
+ #[inline]
+ pub fn to_ascii_uppercase(&self) -> Buf {
+ Buf { inner: self.inner.to_ascii_uppercase() }
+ }
+
+ #[inline]
+ pub fn is_ascii(&self) -> bool {
+ self.inner.is_ascii()
+ }
+
+ #[inline]
+ pub fn eq_ignore_ascii_case(&self, other: &Self) -> bool {
+ self.inner.eq_ignore_ascii_case(&other.inner)
+ }
+}
diff --git a/library/std/src/sys/unix/os_str/tests.rs b/library/std/src/sys/unix/os_str/tests.rs
new file mode 100644
index 000000000..213277f01
--- /dev/null
+++ b/library/std/src/sys/unix/os_str/tests.rs
@@ -0,0 +1,10 @@
+use super::*;
+
+#[test]
+fn slice_debug_output() {
+ let input = Slice::from_u8_slice(b"\xF0hello,\tworld");
+ let expected = r#""\xF0hello,\tworld""#;
+ let output = format!("{input:?}");
+
+ assert_eq!(output, expected);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-17 07:39:39 +0000