diff options
Diffstat (limited to 'src/libstd/sys/unix/process')
| -rw-r--r-- | src/libstd/sys/unix/process/mod.rs | 13 | ||||
| -rw-r--r-- | src/libstd/sys/unix/process/process_common.rs | 469 | ||||
| -rw-r--r-- | src/libstd/sys/unix/process/process_fuchsia.rs | 260 | ||||
| -rw-r--r-- | src/libstd/sys/unix/process/process_unix.rs | 494 | ||||
| -rw-r--r-- | src/libstd/sys/unix/process/zircon.rs | 307 |
5 files changed, 0 insertions, 1543 deletions
diff --git a/src/libstd/sys/unix/process/mod.rs b/src/libstd/sys/unix/process/mod.rs deleted file mode 100644 index 553e980f08e..00000000000 --- a/src/libstd/sys/unix/process/mod.rs +++ /dev/null @@ -1,13 +0,0 @@ -pub use self::process_common::{Command, ExitCode, Stdio, StdioPipes}; -pub use self::process_inner::{ExitStatus, Process}; -pub use crate::ffi::OsString as EnvKey; - -mod process_common; -#[cfg(not(target_os = "fuchsia"))] -#[path = "process_unix.rs"] -mod process_inner; -#[cfg(target_os = "fuchsia")] -#[path = "process_fuchsia.rs"] -mod process_inner; -#[cfg(target_os = "fuchsia")] -mod zircon; diff --git a/src/libstd/sys/unix/process/process_common.rs b/src/libstd/sys/unix/process/process_common.rs deleted file mode 100644 index 6e33cdd3c48..00000000000 --- a/src/libstd/sys/unix/process/process_common.rs +++ /dev/null @@ -1,469 +0,0 @@ -use crate::os::unix::prelude::*; - -use crate::collections::BTreeMap; -use crate::ffi::{CStr, CString, OsStr, OsString}; -use crate::fmt; -use crate::io; -use crate::ptr; -use crate::sys::fd::FileDesc; -use crate::sys::fs::File; -use crate::sys::pipe::{self, AnonPipe}; -use crate::sys_common::process::CommandEnv; - -#[cfg(not(target_os = "fuchsia"))] -use crate::sys::fs::OpenOptions; - -use libc::{c_char, c_int, gid_t, uid_t, EXIT_FAILURE, EXIT_SUCCESS}; - -cfg_if::cfg_if! { - if #[cfg(target_os = "fuchsia")] { - // fuchsia doesn't have /dev/null - } else if #[cfg(target_os = "redox")] { - const DEV_NULL: &str = "null:\0"; - } else { - const DEV_NULL: &str = "/dev/null\0"; - } -} - -// Android with api less than 21 define sig* functions inline, so it is not -// available for dynamic link. Implementing sigemptyset and sigaddset allow us -// to support older Android version (independent of libc version). -// The following implementations are based on https://git.io/vSkNf -cfg_if::cfg_if! { - if #[cfg(target_os = "android")] { - pub unsafe fn sigemptyset(set: *mut libc::sigset_t) -> libc::c_int { - set.write_bytes(0u8, 1); - return 0; - } - #[allow(dead_code)] - pub unsafe fn sigaddset(set: *mut libc::sigset_t, signum: libc::c_int) -> libc::c_int { - use crate::{slice, mem}; - - let raw = slice::from_raw_parts_mut(set as *mut u8, mem::size_of::<libc::sigset_t>()); - let bit = (signum - 1) as usize; - raw[bit / 8] |= 1 << (bit % 8); - return 0; - } - } else { - pub use libc::{sigemptyset, sigaddset}; - } -} - -//////////////////////////////////////////////////////////////////////////////// -// Command -//////////////////////////////////////////////////////////////////////////////// - -pub struct Command { - // Currently we try hard to ensure that the call to `.exec()` doesn't - // actually allocate any memory. While many platforms try to ensure that - // memory allocation works after a fork in a multithreaded process, it's - // been observed to be buggy and somewhat unreliable, so we do our best to - // just not do it at all! - // - // Along those lines, the `argv` and `envp` raw pointers here are exactly - // what's gonna get passed to `execvp`. The `argv` array starts with the - // `program` and ends with a NULL, and the `envp` pointer, if present, is - // also null-terminated. - // - // Right now we don't support removing arguments, so there's no much fancy - // support there, but we support adding and removing environment variables, - // so a side table is used to track where in the `envp` array each key is - // located. Whenever we add a key we update it in place if it's already - // present, and whenever we remove a key we update the locations of all - // other keys. - program: CString, - args: Vec<CString>, - argv: Argv, - env: CommandEnv, - - cwd: Option<CString>, - uid: Option<uid_t>, - gid: Option<gid_t>, - saw_nul: bool, - closures: Vec<Box<dyn FnMut() -> io::Result<()> + Send + Sync>>, - stdin: Option<Stdio>, - stdout: Option<Stdio>, - stderr: Option<Stdio>, -} - -// Create a new type for argv, so that we can make it `Send` and `Sync` -struct Argv(Vec<*const c_char>); - -// It is safe to make `Argv` `Send` and `Sync`, because it contains -// pointers to memory owned by `Command.args` -unsafe impl Send for Argv {} -unsafe impl Sync for Argv {} - -// passed back to std::process with the pipes connected to the child, if any -// were requested -pub struct StdioPipes { - pub stdin: Option<AnonPipe>, - pub stdout: Option<AnonPipe>, - pub stderr: Option<AnonPipe>, -} - -// passed to do_exec() with configuration of what the child stdio should look -// like -pub struct ChildPipes { - pub stdin: ChildStdio, - pub stdout: ChildStdio, - pub stderr: ChildStdio, -} - -pub enum ChildStdio { - Inherit, - Explicit(c_int), - Owned(FileDesc), - - // On Fuchsia, null stdio is the default, so we simply don't specify - // any actions at the time of spawning. - #[cfg(target_os = "fuchsia")] - Null, -} - -pub enum Stdio { - Inherit, - Null, - MakePipe, - Fd(FileDesc), -} - -impl Command { - pub fn new(program: &OsStr) -> Command { - let mut saw_nul = false; - let program = os2c(program, &mut saw_nul); - Command { - argv: Argv(vec![program.as_ptr(), ptr::null()]), - args: vec![program.clone()], - program, - env: Default::default(), - cwd: None, - uid: None, - gid: None, - saw_nul, - closures: Vec::new(), - stdin: None, - stdout: None, - stderr: None, - } - } - - pub fn set_arg_0(&mut self, arg: &OsStr) { - // Set a new arg0 - let arg = os2c(arg, &mut self.saw_nul); - debug_assert!(self.argv.0.len() > 1); - self.argv.0[0] = arg.as_ptr(); - self.args[0] = arg; - } - - pub fn arg(&mut self, arg: &OsStr) { - // Overwrite the trailing NULL pointer in `argv` and then add a new null - // pointer. - let arg = os2c(arg, &mut self.saw_nul); - self.argv.0[self.args.len()] = arg.as_ptr(); - self.argv.0.push(ptr::null()); - - // Also make sure we keep track of the owned value to schedule a - // destructor for this memory. - self.args.push(arg); - } - - pub fn cwd(&mut self, dir: &OsStr) { - self.cwd = Some(os2c(dir, &mut self.saw_nul)); - } - pub fn uid(&mut self, id: uid_t) { - self.uid = Some(id); - } - pub fn gid(&mut self, id: gid_t) { - self.gid = Some(id); - } - - pub fn saw_nul(&self) -> bool { - self.saw_nul - } - pub fn get_argv(&self) -> &Vec<*const c_char> { - &self.argv.0 - } - - pub fn get_program(&self) -> &CStr { - &*self.program - } - - #[allow(dead_code)] - pub fn get_cwd(&self) -> &Option<CString> { - &self.cwd - } - #[allow(dead_code)] - pub fn get_uid(&self) -> Option<uid_t> { - self.uid - } - #[allow(dead_code)] - pub fn get_gid(&self) -> Option<gid_t> { - self.gid - } - - pub fn get_closures(&mut self) -> &mut Vec<Box<dyn FnMut() -> io::Result<()> + Send + Sync>> { - &mut self.closures - } - - pub unsafe fn pre_exec(&mut self, f: Box<dyn FnMut() -> io::Result<()> + Send + Sync>) { - self.closures.push(f); - } - - pub fn stdin(&mut self, stdin: Stdio) { - self.stdin = Some(stdin); - } - - pub fn stdout(&mut self, stdout: Stdio) { - self.stdout = Some(stdout); - } - - pub fn stderr(&mut self, stderr: Stdio) { - self.stderr = Some(stderr); - } - - pub fn env_mut(&mut self) -> &mut CommandEnv { - &mut self.env - } - - pub fn capture_env(&mut self) -> Option<CStringArray> { - let maybe_env = self.env.capture_if_changed(); - maybe_env.map(|env| construct_envp(env, &mut self.saw_nul)) - } - #[allow(dead_code)] - pub fn env_saw_path(&self) -> bool { - self.env.have_changed_path() - } - - pub fn setup_io( - &self, - default: Stdio, - needs_stdin: bool, - ) -> io::Result<(StdioPipes, ChildPipes)> { - let null = Stdio::Null; - let default_stdin = if needs_stdin { &default } else { &null }; - let stdin = self.stdin.as_ref().unwrap_or(default_stdin); - let stdout = self.stdout.as_ref().unwrap_or(&default); - let stderr = self.stderr.as_ref().unwrap_or(&default); - let (their_stdin, our_stdin) = stdin.to_child_stdio(true)?; - let (their_stdout, our_stdout) = stdout.to_child_stdio(false)?; - let (their_stderr, our_stderr) = stderr.to_child_stdio(false)?; - let ours = StdioPipes { stdin: our_stdin, stdout: our_stdout, stderr: our_stderr }; - let theirs = ChildPipes { stdin: their_stdin, stdout: their_stdout, stderr: their_stderr }; - Ok((ours, theirs)) - } -} - -fn os2c(s: &OsStr, saw_nul: &mut bool) -> CString { - CString::new(s.as_bytes()).unwrap_or_else(|_e| { - *saw_nul = true; - CString::new("<string-with-nul>").unwrap() - }) -} - -// Helper type to manage ownership of the strings within a C-style array. -pub struct CStringArray { - items: Vec<CString>, - ptrs: Vec<*const c_char>, -} - -impl CStringArray { - pub fn with_capacity(capacity: usize) -> Self { - let mut result = CStringArray { - items: Vec::with_capacity(capacity), - ptrs: Vec::with_capacity(capacity + 1), - }; - result.ptrs.push(ptr::null()); - result - } - pub fn push(&mut self, item: CString) { - let l = self.ptrs.len(); - self.ptrs[l - 1] = item.as_ptr(); - self.ptrs.push(ptr::null()); - self.items.push(item); - } - pub fn as_ptr(&self) -> *const *const c_char { - self.ptrs.as_ptr() - } -} - -fn construct_envp(env: BTreeMap<OsString, OsString>, saw_nul: &mut bool) -> CStringArray { - let mut result = CStringArray::with_capacity(env.len()); - for (mut k, v) in env { - // Reserve additional space for '=' and null terminator - k.reserve_exact(v.len() + 2); - k.push("="); - k.push(&v); - - // Add the new entry into the array - if let Ok(item) = CString::new(k.into_vec()) { - result.push(item); - } else { - *saw_nul = true; - } - } - - result -} - -impl Stdio { - pub fn to_child_stdio(&self, readable: bool) -> io::Result<(ChildStdio, Option<AnonPipe>)> { - match *self { - Stdio::Inherit => Ok((ChildStdio::Inherit, None)), - - // Make sure that the source descriptors are not an stdio - // descriptor, otherwise the order which we set the child's - // descriptors may blow away a descriptor which we are hoping to - // save. For example, suppose we want the child's stderr to be the - // parent's stdout, and the child's stdout to be the parent's - // stderr. No matter which we dup first, the second will get - // overwritten prematurely. - Stdio::Fd(ref fd) => { - if fd.raw() >= 0 && fd.raw() <= libc::STDERR_FILENO { - Ok((ChildStdio::Owned(fd.duplicate()?), None)) - } else { - Ok((ChildStdio::Explicit(fd.raw()), None)) - } - } - - Stdio::MakePipe => { - let (reader, writer) = pipe::anon_pipe()?; - let (ours, theirs) = if readable { (writer, reader) } else { (reader, writer) }; - Ok((ChildStdio::Owned(theirs.into_fd()), Some(ours))) - } - - #[cfg(not(target_os = "fuchsia"))] - Stdio::Null => { - let mut opts = OpenOptions::new(); - opts.read(readable); - opts.write(!readable); - let path = unsafe { CStr::from_ptr(DEV_NULL.as_ptr() as *const _) }; - let fd = File::open_c(&path, &opts)?; - Ok((ChildStdio::Owned(fd.into_fd()), None)) - } - - #[cfg(target_os = "fuchsia")] - Stdio::Null => Ok((ChildStdio::Null, None)), - } - } -} - -impl From<AnonPipe> for Stdio { - fn from(pipe: AnonPipe) -> Stdio { - Stdio::Fd(pipe.into_fd()) - } -} - -impl From<File> for Stdio { - fn from(file: File) -> Stdio { - Stdio::Fd(file.into_fd()) - } -} - -impl ChildStdio { - pub fn fd(&self) -> Option<c_int> { - match *self { - ChildStdio::Inherit => None, - ChildStdio::Explicit(fd) => Some(fd), - ChildStdio::Owned(ref fd) => Some(fd.raw()), - - #[cfg(target_os = "fuchsia")] - ChildStdio::Null => None, - } - } -} - -impl fmt::Debug for Command { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - if self.program != self.args[0] { - write!(f, "[{:?}] ", self.program)?; - } - write!(f, "{:?}", self.args[0])?; - - for arg in &self.args[1..] { - write!(f, " {:?}", arg)?; - } - Ok(()) - } -} - -#[derive(PartialEq, Eq, Clone, Copy, Debug)] -pub struct ExitCode(u8); - -impl ExitCode { - pub const SUCCESS: ExitCode = ExitCode(EXIT_SUCCESS as _); - pub const FAILURE: ExitCode = ExitCode(EXIT_FAILURE as _); - - #[inline] - pub fn as_i32(&self) -> i32 { - self.0 as i32 - } -} - -#[cfg(all(test, not(target_os = "emscripten")))] -mod tests { - use super::*; - - use crate::ffi::OsStr; - use crate::mem; - use crate::ptr; - use crate::sys::cvt; - - macro_rules! t { - ($e:expr) => { - match $e { - Ok(t) => t, - Err(e) => panic!("received error for `{}`: {}", stringify!($e), e), - } - }; - } - - // See #14232 for more information, but it appears that signal delivery to a - // newly spawned process may just be raced in the macOS, so to prevent this - // test from being flaky we ignore it on macOS. - #[test] - #[cfg_attr(target_os = "macos", ignore)] - // When run under our current QEMU emulation test suite this test fails, - // although the reason isn't very clear as to why. For now this test is - // ignored there. - #[cfg_attr(target_arch = "arm", ignore)] - #[cfg_attr(target_arch = "aarch64", ignore)] - #[cfg_attr(target_arch = "riscv64", ignore)] - fn test_process_mask() { - unsafe { - // Test to make sure that a signal mask does not get inherited. - let mut cmd = Command::new(OsStr::new("cat")); - - let mut set = mem::MaybeUninit::<libc::sigset_t>::uninit(); - let mut old_set = mem::MaybeUninit::<libc::sigset_t>::uninit(); - t!(cvt(sigemptyset(set.as_mut_ptr()))); - t!(cvt(sigaddset(set.as_mut_ptr(), libc::SIGINT))); - t!(cvt(libc::pthread_sigmask(libc::SIG_SETMASK, set.as_ptr(), old_set.as_mut_ptr()))); - - cmd.stdin(Stdio::MakePipe); - cmd.stdout(Stdio::MakePipe); - - let (mut cat, mut pipes) = t!(cmd.spawn(Stdio::Null, true)); - let stdin_write = pipes.stdin.take().unwrap(); - let stdout_read = pipes.stdout.take().unwrap(); - - t!(cvt(libc::pthread_sigmask(libc::SIG_SETMASK, old_set.as_ptr(), ptr::null_mut()))); - - t!(cvt(libc::kill(cat.id() as libc::pid_t, libc::SIGINT))); - // We need to wait until SIGINT is definitely delivered. The - // easiest way is to write something to cat, and try to read it - // back: if SIGINT is unmasked, it'll get delivered when cat is - // next scheduled. - let _ = stdin_write.write(b"Hello"); - drop(stdin_write); - - // Either EOF or failure (EPIPE) is okay. - let mut buf = [0; 5]; - if let Ok(ret) = stdout_read.read(&mut buf) { - assert_eq!(ret, 0); - } - - t!(cat.wait()); - } - } -} diff --git a/src/libstd/sys/unix/process/process_fuchsia.rs b/src/libstd/sys/unix/process/process_fuchsia.rs deleted file mode 100644 index 6daf2885bae..00000000000 --- a/src/libstd/sys/unix/process/process_fuchsia.rs +++ /dev/null @@ -1,260 +0,0 @@ -use crate::convert::TryInto; -use crate::fmt; -use crate::io; -use crate::mem; -use crate::ptr; - -use crate::sys::process::process_common::*; -use crate::sys::process::zircon::{zx_handle_t, Handle}; - -use libc::{c_int, size_t}; - -//////////////////////////////////////////////////////////////////////////////// -// Command -//////////////////////////////////////////////////////////////////////////////// - -impl Command { - pub fn spawn( - &mut self, - default: Stdio, - needs_stdin: bool, - ) -> io::Result<(Process, StdioPipes)> { - let envp = self.capture_env(); - - if self.saw_nul() { - return Err(io::Error::new( - io::ErrorKind::InvalidInput, - "nul byte found in provided data", - )); - } - - let (ours, theirs) = self.setup_io(default, needs_stdin)?; - - let process_handle = unsafe { self.do_exec(theirs, envp.as_ref())? }; - - Ok((Process { handle: Handle::new(process_handle) }, ours)) - } - - pub fn exec(&mut self, default: Stdio) -> io::Error { - if self.saw_nul() { - return io::Error::new(io::ErrorKind::InvalidInput, "nul byte found in provided data"); - } - - match self.setup_io(default, true) { - Ok((_, _)) => { - // FIXME: This is tough because we don't support the exec syscalls - unimplemented!(); - } - Err(e) => e, - } - } - - unsafe fn do_exec( - &mut self, - stdio: ChildPipes, - maybe_envp: Option<&CStringArray>, - ) -> io::Result<zx_handle_t> { - use crate::sys::process::zircon::*; - - let envp = match maybe_envp { - // None means to clone the current environment, which is done in the - // flags below. - None => ptr::null(), - Some(envp) => envp.as_ptr(), - }; - - let make_action = |local_io: &ChildStdio, target_fd| -> io::Result<fdio_spawn_action_t> { - if let Some(local_fd) = local_io.fd() { - Ok(fdio_spawn_action_t { - action: FDIO_SPAWN_ACTION_TRANSFER_FD, - local_fd, - target_fd, - ..Default::default() - }) - } else { - if let ChildStdio::Null = local_io { - // acts as no-op - return Ok(Default::default()); - } - - let mut handle = ZX_HANDLE_INVALID; - let status = fdio_fd_clone(target_fd, &mut handle); - if status == ERR_INVALID_ARGS || status == ERR_NOT_SUPPORTED { - // This descriptor is closed; skip it rather than generating an - // error. - return Ok(Default::default()); - } - zx_cvt(status)?; - - let mut cloned_fd = 0; - zx_cvt(fdio_fd_create(handle, &mut cloned_fd))?; - - Ok(fdio_spawn_action_t { - action: FDIO_SPAWN_ACTION_TRANSFER_FD, - local_fd: cloned_fd as i32, - target_fd, - ..Default::default() - }) - } - }; - - // Clone stdin, stdout, and stderr - let action1 = make_action(&stdio.stdin, 0)?; - let action2 = make_action(&stdio.stdout, 1)?; - let action3 = make_action(&stdio.stderr, 2)?; - let actions = [action1, action2, action3]; - - // We don't want FileDesc::drop to be called on any stdio. fdio_spawn_etc - // always consumes transferred file descriptors. - mem::forget(stdio); - - for callback in self.get_closures().iter_mut() { - callback()?; - } - - let mut process_handle: zx_handle_t = 0; - zx_cvt(fdio_spawn_etc( - ZX_HANDLE_INVALID, - FDIO_SPAWN_CLONE_JOB - | FDIO_SPAWN_CLONE_LDSVC - | FDIO_SPAWN_CLONE_NAMESPACE - | FDIO_SPAWN_CLONE_ENVIRON, // this is ignored when envp is non-null - self.get_program().as_ptr(), - self.get_argv().as_ptr(), - envp, - actions.len() as size_t, - actions.as_ptr(), - &mut process_handle, - ptr::null_mut(), - ))?; - // FIXME: See if we want to do something with that err_msg - - Ok(process_handle) - } -} - -//////////////////////////////////////////////////////////////////////////////// -// Processes -//////////////////////////////////////////////////////////////////////////////// - -pub struct Process { - handle: Handle, -} - -impl Process { - pub fn id(&self) -> u32 { - self.handle.raw() as u32 - } - - pub fn kill(&mut self) -> io::Result<()> { - use crate::sys::process::zircon::*; - - unsafe { - zx_cvt(zx_task_kill(self.handle.raw()))?; - } - - Ok(()) - } - - pub fn wait(&mut self) -> io::Result<ExitStatus> { - use crate::default::Default; - use crate::sys::process::zircon::*; - - let mut proc_info: zx_info_process_t = Default::default(); - let mut actual: size_t = 0; - let mut avail: size_t = 0; - - unsafe { - zx_cvt(zx_object_wait_one( - self.handle.raw(), - ZX_TASK_TERMINATED, - ZX_TIME_INFINITE, - ptr::null_mut(), - ))?; - zx_cvt(zx_object_get_info( - self.handle.raw(), - ZX_INFO_PROCESS, - &mut proc_info as *mut _ as *mut libc::c_void, - mem::size_of::<zx_info_process_t>(), - &mut actual, - &mut avail, - ))?; - } - if actual != 1 { - return Err(io::Error::new( - io::ErrorKind::InvalidData, - "Failed to get exit status of process", - )); - } - Ok(ExitStatus(proc_info.return_code)) - } - - pub fn try_wait(&mut self) -> io::Result<Option<ExitStatus>> { - use crate::default::Default; - use crate::sys::process::zircon::*; - - let mut proc_info: zx_info_process_t = Default::default(); - let mut actual: size_t = 0; - let mut avail: size_t = 0; - - unsafe { - let status = - zx_object_wait_one(self.handle.raw(), ZX_TASK_TERMINATED, 0, ptr::null_mut()); - match status { - 0 => {} // Success - x if x == ERR_TIMED_OUT => { - return Ok(None); - } - _ => { - panic!("Failed to wait on process handle: {}", status); - } - } - zx_cvt(zx_object_get_info( - self.handle.raw(), - ZX_INFO_PROCESS, - &mut proc_info as *mut _ as *mut libc::c_void, - mem::size_of::<zx_info_process_t>(), - &mut actual, - &mut avail, - ))?; - } - if actual != 1 { - return Err(io::Error::new( - io::ErrorKind::InvalidData, - "Failed to get exit status of process", - )); - } - Ok(Some(ExitStatus(proc_info.return_code))) - } -} - -#[derive(PartialEq, Eq, Clone, Copy, Debug)] -pub struct ExitStatus(i64); - -impl ExitStatus { - pub fn success(&self) -> bool { - self.code() == Some(0) - } - - pub fn code(&self) -> Option<i32> { - // FIXME: support extracting return code as an i64 - self.0.try_into().ok() - } - - pub fn signal(&self) -> Option<i32> { - None - } -} - -/// Converts a raw `c_int` to a type-safe `ExitStatus` by wrapping it without copying. -impl From<c_int> for ExitStatus { - fn from(a: c_int) -> ExitStatus { - ExitStatus(a as i64) - } -} - -impl fmt::Display for ExitStatus { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - write!(f, "exit code: {}", self.0) - } -} diff --git a/src/libstd/sys/unix/process/process_unix.rs b/src/libstd/sys/unix/process/process_unix.rs deleted file mode 100644 index 0f349dfa302..00000000000 --- a/src/libstd/sys/unix/process/process_unix.rs +++ /dev/null @@ -1,494 +0,0 @@ -use crate::convert::TryInto; -use crate::fmt; -use crate::io::{self, Error, ErrorKind}; -use crate::ptr; -use crate::sys; -use crate::sys::cvt; -use crate::sys::process::process_common::*; - -use libc::{c_int, gid_t, pid_t, uid_t}; - -//////////////////////////////////////////////////////////////////////////////// -// Command -//////////////////////////////////////////////////////////////////////////////// - -impl Command { - pub fn spawn( - &mut self, - default: Stdio, - needs_stdin: bool, - ) -> io::Result<(Process, StdioPipes)> { - const CLOEXEC_MSG_FOOTER: [u8; 4] = *b"NOEX"; - - let envp = self.capture_env(); - - if self.saw_nul() { - return Err(io::Error::new(ErrorKind::InvalidInput, "nul byte found in provided data")); - } - - let (ours, theirs) = self.setup_io(default, needs_stdin)?; - - if let Some(ret) = self.posix_spawn(&theirs, envp.as_ref())? { - return Ok((ret, ours)); - } - - let (input, output) = sys::pipe::anon_pipe()?; - - // Whatever happens after the fork is almost for sure going to touch or - // look at the environment in one way or another (PATH in `execvp` or - // accessing the `environ` pointer ourselves). Make sure no other thread - // is accessing the environment when we do the fork itself. - // - // Note that as soon as we're done with the fork there's no need to hold - // a lock any more because the parent won't do anything and the child is - // in its own process. - let result = unsafe { - let _env_lock = sys::os::env_lock(); - cvt(libc::fork())? - }; - - let pid = unsafe { - match result { - 0 => { - drop(input); - let Err(err) = self.do_exec(theirs, envp.as_ref()); - let errno = err.raw_os_error().unwrap_or(libc::EINVAL) as u32; - let errno = errno.to_be_bytes(); - let bytes = [ - errno[0], - errno[1], - errno[2], - errno[3], - CLOEXEC_MSG_FOOTER[0], - CLOEXEC_MSG_FOOTER[1], - CLOEXEC_MSG_FOOTER[2], - CLOEXEC_MSG_FOOTER[3], - ]; - // pipe I/O up to PIPE_BUF bytes should be atomic, and then - // we want to be sure we *don't* run at_exit destructors as - // we're being torn down regardless - assert!(output.write(&bytes).is_ok()); - libc::_exit(1) - } - n => n, - } - }; - - let mut p = Process { pid, status: None }; - drop(output); - let mut bytes = [0; 8]; - - // loop to handle EINTR - loop { - match input.read(&mut bytes) { - Ok(0) => return Ok((p, ours)), - Ok(8) => { - let (errno, footer) = bytes.split_at(4); - assert_eq!( - CLOEXEC_MSG_FOOTER, footer, - "Validation on the CLOEXEC pipe failed: {:?}", - bytes - ); - let errno = i32::from_be_bytes(errno.try_into().unwrap()); - assert!(p.wait().is_ok(), "wait() should either return Ok or panic"); - return Err(Error::from_raw_os_error(errno)); - } - Err(ref e) if e.kind() == ErrorKind::Interrupted => {} - Err(e) => { - assert!(p.wait().is_ok(), "wait() should either return Ok or panic"); - panic!("the CLOEXEC pipe failed: {:?}", e) - } - Ok(..) => { - // pipe I/O up to PIPE_BUF bytes should be atomic - assert!(p.wait().is_ok(), "wait() should either return Ok or panic"); - panic!("short read on the CLOEXEC pipe") - } - } - } - } - - pub fn exec(&mut self, default: Stdio) -> io::Error { - let envp = self.capture_env(); - - if self.saw_nul() { - return io::Error::new(ErrorKind::InvalidInput, "nul byte found in provided data"); - } - - match self.setup_io(default, true) { - Ok((_, theirs)) => { - unsafe { - // Similar to when forking, we want to ensure that access to - // the environment is synchronized, so make sure to grab the - // environment lock before we try to exec. - let _lock = sys::os::env_lock(); - - let Err(e) = self.do_exec(theirs, envp.as_ref()); - e - } - } - Err(e) => e, - } - } - - // And at this point we've reached a special time in the life of the - // child. The child must now be considered hamstrung and unable to - // do anything other than syscalls really. Consider the following - // scenario: - // - // 1. Thread A of process 1 grabs the malloc() mutex - // 2. Thread B of process 1 forks(), creating thread C - // 3. Thread C of process 2 then attempts to malloc() - // 4. The memory of process 2 is the same as the memory of - // process 1, so the mutex is locked. - // - // This situation looks a lot like deadlock, right? It turns out - // that this is what pthread_atfork() takes care of, which is - // presumably implemented across platforms. The first thing that - // threads to *before* forking is to do things like grab the malloc - // mutex, and then after the fork they unlock it. - // - // Despite this information, libnative's spawn has been witnessed to - // deadlock on both macOS and FreeBSD. I'm not entirely sure why, but - // all collected backtraces point at malloc/free traffic in the - // child spawned process. - // - // For this reason, the block of code below should contain 0 - // invocations of either malloc of free (or their related friends). - // - // As an example of not having malloc/free traffic, we don't close - // this file descriptor by dropping the FileDesc (which contains an - // allocation). Instead we just close it manually. This will never - // have the drop glue anyway because this code never returns (the - // child will either exec() or invoke libc::exit) - unsafe fn do_exec( - &mut self, - stdio: ChildPipes, - maybe_envp: Option<&CStringArray>, - ) -> Result<!, io::Error> { - use crate::sys::{self, cvt_r}; - - if let Some(fd) = stdio.stdin.fd() { - cvt_r(|| libc::dup2(fd, libc::STDIN_FILENO))?; - } - if let Some(fd) = stdio.stdout.fd() { - cvt_r(|| libc::dup2(fd, libc::STDOUT_FILENO))?; - } - if let Some(fd) = stdio.stderr.fd() { - cvt_r(|| libc::dup2(fd, libc::STDERR_FILENO))?; - } - - #[cfg(not(target_os = "l4re"))] - { - if let Some(u) = self.get_gid() { - cvt(libc::setgid(u as gid_t))?; - } - if let Some(u) = self.get_uid() { - // When dropping privileges from root, the `setgroups` call - // will remove any extraneous groups. If we don't call this, - // then even though our uid has dropped, we may still have - // groups that enable us to do super-user things. This will - // fail if we aren't root, so don't bother checking the - // return value, this is just done as an optimistic - // privilege dropping function. - //FIXME: Redox kernel does not support setgroups yet - #[cfg(not(target_os = "redox"))] - let _ = libc::setgroups(0, ptr::null()); - cvt(libc::setuid(u as uid_t))?; - } - } - if let Some(ref cwd) = *self.get_cwd() { - cvt(libc::chdir(cwd.as_ptr()))?; - } - - // emscripten has no signal support. - #[cfg(not(target_os = "emscripten"))] - { - use crate::mem::MaybeUninit; - // Reset signal handling so the child process starts in a - // standardized state. libstd ignores SIGPIPE, and signal-handling - // libraries often set a mask. Child processes inherit ignored - // signals and the signal mask from their parent, but most - // UNIX programs do not reset these things on their own, so we - // need to clean things up now to avoid confusing the program - // we're about to run. - let mut set = MaybeUninit::<libc::sigset_t>::uninit(); - cvt(sigemptyset(set.as_mut_ptr()))?; - cvt(libc::pthread_sigmask(libc::SIG_SETMASK, set.as_ptr(), ptr::null_mut()))?; - let ret = sys::signal(libc::SIGPIPE, libc::SIG_DFL); - if ret == libc::SIG_ERR { - return Err(io::Error::last_os_error()); - } - } - - for callback in self.get_closures().iter_mut() { - callback()?; - } - - // Although we're performing an exec here we may also return with an - // error from this function (without actually exec'ing) in which case we - // want to be sure to restore the global environment back to what it - // once was, ensuring that our temporary override, when free'd, doesn't - // corrupt our process's environment. - let mut _reset = None; - if let Some(envp) = maybe_envp { - struct Reset(*const *const libc::c_char); - - impl Drop for Reset { - fn drop(&mut self) { - unsafe { - *sys::os::environ() = self.0; - } - } - } - - _reset = Some(Reset(*sys::os::environ())); - *sys::os::environ() = envp.as_ptr(); - } - - libc::execvp(self.get_program().as_ptr(), self.get_argv().as_ptr()); - Err(io::Error::last_os_error()) - } - - #[cfg(not(any( - target_os = "macos", - target_os = "freebsd", - all(target_os = "linux", target_env = "gnu") - )))] - fn posix_spawn( - &mut self, - _: &ChildPipes, - _: Option<&CStringArray>, - ) -> io::Result<Option<Process>> { - Ok(None) - } - - // Only support platforms for which posix_spawn() can return ENOENT - // directly. - #[cfg(any( - target_os = "macos", - target_os = "freebsd", - all(target_os = "linux", target_env = "gnu") - ))] - fn posix_spawn( - &mut self, - stdio: &ChildPipes, - envp: Option<&CStringArray>, - ) -> io::Result<Option<Process>> { - use crate::mem::MaybeUninit; - use crate::sys; - - if self.get_gid().is_some() - || self.get_uid().is_some() - || self.env_saw_path() - || !self.get_closures().is_empty() - { - return Ok(None); - } - - // Only glibc 2.24+ posix_spawn() supports returning ENOENT directly. - #[cfg(all(target_os = "linux", target_env = "gnu"))] - { - if let Some(version) = sys::os::glibc_version() { - if version < (2, 24) { - return Ok(None); - } - } else { - return Ok(None); - } - } - - // Solaris and glibc 2.29+ can set a new working directory, and maybe - // others will gain this non-POSIX function too. We'll check for this - // weak symbol as soon as it's needed, so we can return early otherwise - // to do a manual chdir before exec. - weak! { - fn posix_spawn_file_actions_addchdir_np( - *mut libc::posix_spawn_file_actions_t, - *const libc::c_char - ) -> libc::c_int - } - let addchdir = match self.get_cwd() { - Some(cwd) => match posix_spawn_file_actions_addchdir_np.get() { - Some(f) => Some((f, cwd)), - None => return Ok(None), - }, - None => None, - }; - - let mut p = Process { pid: 0, status: None }; - - struct PosixSpawnFileActions(MaybeUninit<libc::posix_spawn_file_actions_t>); - - impl Drop for PosixSpawnFileActions { - fn drop(&mut self) { - unsafe { - libc::posix_spawn_file_actions_destroy(self.0.as_mut_ptr()); - } - } - } - - struct PosixSpawnattr(MaybeUninit<libc::posix_spawnattr_t>); - - impl Drop for PosixSpawnattr { - fn drop(&mut self) { - unsafe { - libc::posix_spawnattr_destroy(self.0.as_mut_ptr()); - } - } - } - - unsafe { - let mut file_actions = PosixSpawnFileActions(MaybeUninit::uninit()); - let mut attrs = PosixSpawnattr(MaybeUninit::uninit()); - - libc::posix_spawnattr_init(attrs.0.as_mut_ptr()); - libc::posix_spawn_file_actions_init(file_actions.0.as_mut_ptr()); - - if let Some(fd) = stdio.stdin.fd() { - cvt(libc::posix_spawn_file_actions_adddup2( - file_actions.0.as_mut_ptr(), - fd, - libc::STDIN_FILENO, - ))?; - } - if let Some(fd) = stdio.stdout.fd() { - cvt(libc::posix_spawn_file_actions_adddup2( - file_actions.0.as_mut_ptr(), - fd, - libc::STDOUT_FILENO, - ))?; - } - if let Some(fd) = stdio.stderr.fd() { - cvt(libc::posix_spawn_file_actions_adddup2( - file_actions.0.as_mut_ptr(), - fd, - libc::STDERR_FILENO, - ))?; - } - if let Some((f, cwd)) = addchdir { - cvt(f(file_actions.0.as_mut_ptr(), cwd.as_ptr()))?; - } - - let mut set = MaybeUninit::<libc::sigset_t>::uninit(); - cvt(sigemptyset(set.as_mut_ptr()))?; - cvt(libc::posix_spawnattr_setsigmask(attrs.0.as_mut_ptr(), set.as_ptr()))?; - cvt(sigaddset(set.as_mut_ptr(), libc::SIGPIPE))?; - cvt(libc::posix_spawnattr_setsigdefault(attrs.0.as_mut_ptr(), set.as_ptr()))?; - - let flags = libc::POSIX_SPAWN_SETSIGDEF | libc::POSIX_SPAWN_SETSIGMASK; - cvt(libc::posix_spawnattr_setflags(attrs.0.as_mut_ptr(), flags as _))?; - - // Make sure we synchronize access to the global `environ` resource - let _env_lock = sys::os::env_lock(); - let envp = envp.map(|c| c.as_ptr()).unwrap_or_else(|| *sys::os::environ() as *const _); - let ret = libc::posix_spawnp( - &mut p.pid, - self.get_program().as_ptr(), - file_actions.0.as_ptr(), - attrs.0.as_ptr(), - self.get_argv().as_ptr() as *const _, - envp as *const _, - ); - if ret == 0 { Ok(Some(p)) } else { Err(io::Error::from_raw_os_error(ret)) } - } - } -} - -//////////////////////////////////////////////////////////////////////////////// -// Processes -//////////////////////////////////////////////////////////////////////////////// - -/// The unique ID of the process (this should never be negative). -pub struct Process { - pid: pid_t, - status: Option<ExitStatus>, -} - -impl Process { - pub fn id(&self) -> u32 { - self.pid as u32 - } - - pub fn kill(&mut self) -> io::Result<()> { - // If we've already waited on this process then the pid can be recycled - // and used for another process, and we probably shouldn't be killing - // random processes, so just return an error. - if self.status.is_some() { - Err(Error::new( - ErrorKind::InvalidInput, - "invalid argument: can't kill an exited process", - )) - } else { - cvt(unsafe { libc::kill(self.pid, libc::SIGKILL) }).map(drop) - } - } - - pub fn wait(&mut self) -> io::Result<ExitStatus> { - use crate::sys::cvt_r; - if let Some(status) = self.status { - return Ok(status); - } - let mut status = 0 as c_int; - cvt_r(|| unsafe { libc::waitpid(self.pid, &mut status, 0) })?; - self.status = Some(ExitStatus::new(status)); - Ok(ExitStatus::new(status)) - } - - pub fn try_wait(&mut self) -> io::Result<Option<ExitStatus>> { - if let Some(status) = self.status { - return Ok(Some(status)); - } - let mut status = 0 as c_int; - let pid = cvt(unsafe { libc::waitpid(self.pid, &mut status, libc::WNOHANG) })?; - if pid == 0 { - Ok(None) - } else { - self.status = Some(ExitStatus::new(status)); - Ok(Some(ExitStatus::new(status))) - } - } -} - -/// Unix exit statuses -#[derive(PartialEq, Eq, Clone, Copy, Debug)] -pub struct ExitStatus(c_int); - -impl ExitStatus { - pub fn new(status: c_int) -> ExitStatus { - ExitStatus(status) - } - - fn exited(&self) -> bool { - unsafe { libc::WIFEXITED(self.0) } - } - - pub fn success(&self) -> bool { - self.code() == Some(0) - } - - pub fn code(&self) -> Option<i32> { - if self.exited() { Some(unsafe { libc::WEXITSTATUS(self.0) }) } else { None } - } - - pub fn signal(&self) -> Option<i32> { - if !self.exited() { Some(unsafe { libc::WTERMSIG(self.0) }) } else { None } - } -} - -/// Converts a raw `c_int` to a type-safe `ExitStatus` by wrapping it without copying. -impl From<c_int> for ExitStatus { - fn from(a: c_int) -> ExitStatus { - ExitStatus(a) - } -} - -impl fmt::Display for ExitStatus { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - if let Some(code) = self.code() { - write!(f, "exit code: {}", code) - } else { - let signal = self.signal().unwrap(); - write!(f, "signal: {}", signal) - } - } -} diff --git a/src/libstd/sys/unix/process/zircon.rs b/src/libstd/sys/unix/process/zircon.rs deleted file mode 100644 index 750b8f0762a..00000000000 --- a/src/libstd/sys/unix/process/zircon.rs +++ /dev/null @@ -1,307 +0,0 @@ -#![allow(non_camel_case_types, unused)] - -use crate::convert::TryInto; -use crate::i64; -use crate::io; -use crate::mem::MaybeUninit; -use crate::os::raw::c_char; - -use libc::{c_int, c_void, size_t}; - -pub type zx_handle_t = u32; -pub type zx_vaddr_t = usize; -pub type zx_rights_t = u32; -pub type zx_status_t = i32; - -pub const ZX_HANDLE_INVALID: zx_handle_t = 0; - -pub type zx_time_t = i64; -pub const ZX_TIME_INFINITE: zx_time_t = i64::MAX; - -pub type zx_signals_t = u32; - -pub const ZX_OBJECT_SIGNAL_3: zx_signals_t = 1 << 3; - -pub const ZX_TASK_TERMINATED: zx_signals_t = ZX_OBJECT_SIGNAL_3; - -pub const ZX_RIGHT_SAME_RIGHTS: zx_rights_t = 1 << 31; - -pub type zx_object_info_topic_t = u32; - -pub const ZX_INFO_PROCESS: zx_object_info_topic_t = 3; - -pub fn zx_cvt<T>(t: T) -> io::Result<T> -where - T: TryInto<zx_status_t> + Copy, -{ - if let Ok(status) = TryInto::try_into(t) { - if status < 0 { Err(io::Error::from_raw_os_error(status)) } else { Ok(t) } - } else { - Err(io::Error::last_os_error()) - } -} - -// Safe wrapper around zx_handle_t -pub struct Handle { - raw: zx_handle_t, -} - -impl Handle { - pub fn new(raw: zx_handle_t) -> Handle { - Handle { raw } - } - - pub fn raw(&self) -> zx_handle_t { - self.raw - } -} - -impl Drop for Handle { - fn drop(&mut self) { - unsafe { - zx_cvt(zx_handle_close(self.raw)).expect("Failed to close zx_handle_t"); - } - } -} - -// Returned for topic ZX_INFO_PROCESS -#[derive(Default)] -#[repr(C)] -pub struct zx_info_process_t { - pub return_code: i64, - pub started: bool, - pub exited: bool, - pub debugger_attached: bool, -} - -extern "C" { - pub fn zx_job_default() -> zx_handle_t; - - pub fn zx_task_kill(handle: zx_handle_t) -> zx_status_t; - - pub fn zx_handle_close(handle: zx_handle_t) -> zx_status_t; - - pub fn zx_handle_duplicate( - handle: zx_handle_t, - rights: zx_rights_t, - out: *const zx_handle_t, - ) -> zx_handle_t; - - pub fn zx_object_wait_one( - handle: zx_handle_t, - signals: zx_signals_t, - timeout: zx_time_t, - pending: *mut zx_signals_t, - ) -> zx_status_t; - - pub fn zx_object_get_info( - handle: zx_handle_t, - topic: u32, - buffer: *mut c_void, - buffer_size: size_t, - actual_size: *mut size_t, - avail: *mut size_t, - ) -> zx_status_t; -} - -#[derive(Default)] -#[repr(C)] -pub struct fdio_spawn_action_t { - pub action: u32, - pub reserved0: u32, - pub local_fd: i32, - pub target_fd: i32, - pub reserved1: u64, -} - -extern "C" { - pub fn fdio_spawn_etc( - job: zx_handle_t, - flags: u32, - path: *const c_char, - argv: *const *const c_char, - envp: *const *const c_char, - action_count: size_t, - actions: *const fdio_spawn_action_t, - process: *mut zx_handle_t, - err_msg: *mut c_char, - ) -> zx_status_t; - - pub fn fdio_fd_clone(fd: c_int, out_handle: *mut zx_handle_t) -> zx_status_t; - pub fn fdio_fd_create(handle: zx_handle_t, fd: *mut c_int) -> zx_status_t; -} - -// fdio_spawn_etc flags - -pub const FDIO_SPAWN_CLONE_JOB: u32 = 0x0001; -pub const FDIO_SPAWN_CLONE_LDSVC: u32 = 0x0002; -pub const FDIO_SPAWN_CLONE_NAMESPACE: u32 = 0x0004; -pub const FDIO_SPAWN_CLONE_STDIO: u32 = 0x0008; -pub const FDIO_SPAWN_CLONE_ENVIRON: u32 = 0x0010; -pub const FDIO_SPAWN_CLONE_ALL: u32 = 0xFFFF; - -// fdio_spawn_etc actions - -pub const FDIO_SPAWN_ACTION_CLONE_FD: u32 = 0x0001; -pub const FDIO_SPAWN_ACTION_TRANSFER_FD: u32 = 0x0002; - -// Errors - -#[allow(unused)] -pub const ERR_INTERNAL: zx_status_t = -1; - -// ERR_NOT_SUPPORTED: The operation is not implemented, supported, -// or enabled. -#[allow(unused)] -pub const ERR_NOT_SUPPORTED: zx_status_t = -2; - -// ERR_NO_RESOURCES: The system was not able to allocate some resource -// needed for the operation. -#[allow(unused)] -pub const ERR_NO_RESOURCES: zx_status_t = -3; - -// ERR_NO_MEMORY: The system was not able to allocate memory needed -// for the operation. -#[allow(unused)] -pub const ERR_NO_MEMORY: zx_status_t = -4; - -// ERR_CALL_FAILED: The second phase of zx_channel_call(; did not complete -// successfully. -#[allow(unused)] -pub const ERR_CALL_FAILED: zx_status_t = -5; - -// ERR_INTERRUPTED_RETRY: The system call was interrupted, but should be -// retried. This should not be seen outside of the VDSO. -#[allow(unused)] -pub const ERR_INTERRUPTED_RETRY: zx_status_t = -6; - -// ======= Parameter errors ======= -// ERR_INVALID_ARGS: an argument is invalid, ex. null pointer -#[allow(unused)] -pub const ERR_INVALID_ARGS: zx_status_t = -10; - -// ERR_BAD_HANDLE: A specified handle value does not refer to a handle. -#[allow(unused)] -pub const ERR_BAD_HANDLE: zx_status_t = -11; - -// ERR_WRONG_TYPE: The subject of the operation is the wrong type to -// perform the operation. -// Example: Attempting a message_read on a thread handle. -#[allow(unused)] -pub const ERR_WRONG_TYPE: zx_status_t = -12; - -// ERR_BAD_SYSCALL: The specified syscall number is invalid. -#[allow(unused)] -pub const ERR_BAD_SYSCALL: zx_status_t = -13; - -// ERR_OUT_OF_RANGE: An argument is outside the valid range for this -// operation. -#[allow(unused)] -pub const ERR_OUT_OF_RANGE: zx_status_t = -14; - -// ERR_BUFFER_TOO_SMALL: A caller provided buffer is too small for -// this operation. -#[allow(unused)] -pub const ERR_BUFFER_TOO_SMALL: zx_status_t = -15; - -// ======= Precondition or state errors ======= -// ERR_BAD_STATE: operation failed because the current state of the -// object does not allow it, or a precondition of the operation is -// not satisfied -#[allow(unused)] -pub const ERR_BAD_STATE: zx_status_t = -20; - -// ERR_TIMED_OUT: The time limit for the operation elapsed before -// the operation completed. -#[allow(unused)] -pub const ERR_TIMED_OUT: zx_status_t = -21; - -// ERR_SHOULD_WAIT: The operation cannot be performed currently but -// potentially could succeed if the caller waits for a prerequisite -// to be satisfied, for example waiting for a handle to be readable -// or writable. -// Example: Attempting to read from a message pipe that has no -// messages waiting but has an open remote will return ERR_SHOULD_WAIT. -// Attempting to read from a message pipe that has no messages waiting -// and has a closed remote end will return ERR_REMOTE_CLOSED. -#[allow(unused)] -pub const ERR_SHOULD_WAIT: zx_status_t = -22; - -// ERR_CANCELED: The in-progress operation (e.g., a wait) has been -// // canceled. -#[allow(unused)] -pub const ERR_CANCELED: zx_status_t = -23; - -// ERR_PEER_CLOSED: The operation failed because the remote end -// of the subject of the operation was closed. -#[allow(unused)] -pub const ERR_PEER_CLOSED: zx_status_t = -24; - -// ERR_NOT_FOUND: The requested entity is not found. -#[allow(unused)] -pub const ERR_NOT_FOUND: zx_status_t = -25; - -// ERR_ALREADY_EXISTS: An object with the specified identifier -// already exists. -// Example: Attempting to create a file when a file already exists -// with that name. -#[allow(unused)] -pub const ERR_ALREADY_EXISTS: zx_status_t = -26; - -// ERR_ALREADY_BOUND: The operation failed because the named entity -// is already owned or controlled by another entity. The operation -// could succeed later if the current owner releases the entity. -#[allow(unused)] -pub const ERR_ALREADY_BOUND: zx_status_t = -27; - -// ERR_UNAVAILABLE: The subject of the operation is currently unable -// to perform the operation. -// Note: This is used when there's no direct way for the caller to -// observe when the subject will be able to perform the operation -// and should thus retry. -#[allow(unused)] -pub const ERR_UNAVAILABLE: zx_status_t = -28; - -// ======= Permission check errors ======= -// ERR_ACCESS_DENIED: The caller did not have permission to perform -// the specified operation. -#[allow(unused)] -pub const ERR_ACCESS_DENIED: zx_status_t = -30; - -// ======= Input-output errors ======= -// ERR_IO: Otherwise unspecified error occurred during I/O. -#[allow(unused)] -pub const ERR_IO: zx_status_t = -40; - -// ERR_REFUSED: The entity the I/O operation is being performed on -// rejected the operation. -// Example: an I2C device NAK'ing a transaction or a disk controller -// rejecting an invalid command. -#[allow(unused)] -pub const ERR_IO_REFUSED: zx_status_t = -41; - -// ERR_IO_DATA_INTEGRITY: The data in the operation failed an integrity -// check and is possibly corrupted. -// Example: CRC or Parity error. -#[allow(unused)] -pub const ERR_IO_DATA_INTEGRITY: zx_status_t = -42; - -// ERR_IO_DATA_LOSS: The data in the operation is currently unavailable -// and may be permanently lost. -// Example: A disk block is irrecoverably damaged. -#[allow(unused)] -pub const ERR_IO_DATA_LOSS: zx_status_t = -43; - -// Filesystem specific errors -#[allow(unused)] -pub const ERR_BAD_PATH: zx_status_t = -50; -#[allow(unused)] -pub const ERR_NOT_DIR: zx_status_t = -51; -#[allow(unused)] -pub const ERR_NOT_FILE: zx_status_t = -52; -// ERR_FILE_BIG: A file exceeds a filesystem-specific size limit. -#[allow(unused)] -pub const ERR_FILE_BIG: zx_status_t = -53; -// ERR_NO_SPACE: Filesystem or device space is exhausted. -#[allow(unused)] -pub const ERR_NO_SPACE: zx_status_t = -54; |