diff options
Diffstat (limited to 'vendor/rustix/src/backend/libc/process/syscalls.rs')
| -rw-r--r-- | vendor/rustix/src/backend/libc/process/syscalls.rs | 94 |
1 files changed, 87 insertions, 7 deletions
diff --git a/vendor/rustix/src/backend/libc/process/syscalls.rs b/vendor/rustix/src/backend/libc/process/syscalls.rs index d208bda7a..d8f4fe3a4 100644 --- a/vendor/rustix/src/backend/libc/process/syscalls.rs +++ b/vendor/rustix/src/backend/libc/process/syscalls.rs @@ -5,7 +5,7 @@ use super::super::c; use super::super::conv::borrowed_fd; use super::super::conv::{c_str, ret, ret_c_int, ret_discarded_char_ptr}; #[cfg(not(target_os = "wasi"))] -use super::super::conv::{ret_infallible, ret_pid_t}; +use super::super::conv::{ret_infallible, ret_pid_t, ret_usize}; #[cfg(any(target_os = "android", target_os = "linux"))] use super::super::conv::{syscall_ret, syscall_ret_u32}; #[cfg(any( @@ -23,6 +23,8 @@ use crate::ffi::CStr; #[cfg(feature = "fs")] use crate::fs::Mode; use crate::io; +#[cfg(any(target_os = "android", target_os = "linux"))] +use crate::process::Sysinfo; #[cfg(not(any(target_os = "wasi", target_os = "redox", target_os = "openbsd")))] use crate::process::{WaitId, WaitidOptions, WaitidStatus}; use core::mem::MaybeUninit; @@ -37,12 +39,12 @@ use { use { super::super::offset::{libc_getrlimit, libc_rlimit, libc_setrlimit, LIBC_RLIM_INFINITY}, crate::process::{Resource, Rlimit}, - core::convert::TryInto, }; #[cfg(not(target_os = "wasi"))] use { super::types::RawUname, crate::process::{Gid, Pid, RawNonZeroPid, RawPid, Signal, Uid, WaitOptions, WaitStatus}, + core::convert::TryInto, }; #[cfg(not(target_os = "wasi"))] @@ -55,6 +57,11 @@ pub(crate) fn fchdir(dirfd: BorrowedFd<'_>) -> io::Result<()> { unsafe { ret(c::fchdir(borrowed_fd(dirfd))) } } +#[cfg(not(any(target_os = "fuchsia", target_os = "wasi")))] +pub(crate) fn chroot(path: &CStr) -> io::Result<()> { + unsafe { ret(c::chroot(c_str(path))) } +} + #[cfg(not(target_os = "wasi"))] pub(crate) fn getcwd(buf: &mut [u8]) -> io::Result<()> { unsafe { ret_discarded_char_ptr(c::getcwd(buf.as_mut_ptr().cast(), buf.len())) } @@ -62,7 +69,7 @@ pub(crate) fn getcwd(buf: &mut [u8]) -> io::Result<()> { #[cfg(any(target_os = "android", target_os = "linux"))] pub(crate) fn membarrier_query() -> MembarrierQuery { - // GLIBC does not have a wrapper for `membarrier`; [the documentation] + // glibc does not have a wrapper for `membarrier`; [the documentation] // says to use `syscall`. // // [the documentation]: https://man7.org/linux/man-pages/man2/membarrier.2.html#NOTES @@ -166,6 +173,12 @@ pub(crate) fn getpgid(pid: Option<Pid>) -> io::Result<Pid> { #[cfg(not(target_os = "wasi"))] #[inline] +pub(crate) fn setpgid(pid: Option<Pid>, pgid: Option<Pid>) -> io::Result<()> { + unsafe { ret(c::setpgid(Pid::as_raw(pid) as _, Pid::as_raw(pgid) as _)) } +} + +#[cfg(not(target_os = "wasi"))] +#[inline] #[must_use] pub(crate) fn getpgrp() -> Pid { unsafe { @@ -426,7 +439,9 @@ pub(crate) fn waitid(id: WaitId<'_>, options: WaitidOptions) -> io::Result<Optio #[cfg(not(any(target_os = "wasi", target_os = "redox", target_os = "openbsd")))] #[inline] fn _waitid_all(options: WaitidOptions) -> io::Result<Option<WaitidStatus>> { - let mut status = MaybeUninit::<c::siginfo_t>::uninit(); + // `waitid` can return successfully without initializing the struct (no + // children found when using `WNOHANG`) + let mut status = MaybeUninit::<c::siginfo_t>::zeroed(); unsafe { ret(c::waitid( c::P_ALL, @@ -442,7 +457,9 @@ fn _waitid_all(options: WaitidOptions) -> io::Result<Option<WaitidStatus>> { #[cfg(not(any(target_os = "wasi", target_os = "redox", target_os = "openbsd")))] #[inline] fn _waitid_pid(pid: Pid, options: WaitidOptions) -> io::Result<Option<WaitidStatus>> { - let mut status = MaybeUninit::<c::siginfo_t>::uninit(); + // `waitid` can return successfully without initializing the struct (no + // children found when using `WNOHANG`) + let mut status = MaybeUninit::<c::siginfo_t>::zeroed(); unsafe { ret(c::waitid( c::P_PID, @@ -458,7 +475,9 @@ fn _waitid_pid(pid: Pid, options: WaitidOptions) -> io::Result<Option<WaitidStat #[cfg(target_os = "linux")] #[inline] fn _waitid_pidfd(fd: BorrowedFd<'_>, options: WaitidOptions) -> io::Result<Option<WaitidStatus>> { - let mut status = MaybeUninit::<c::siginfo_t>::uninit(); + // `waitid` can return successfully without initializing the struct (no + // children found when using `WNOHANG`) + let mut status = MaybeUninit::<c::siginfo_t>::zeroed(); unsafe { ret(c::waitid( c::P_PIDFD, @@ -481,6 +500,13 @@ fn _waitid_pidfd(fd: BorrowedFd<'_>, options: WaitidOptions) -> io::Result<Optio #[inline] unsafe fn cvt_waitid_status(status: MaybeUninit<c::siginfo_t>) -> Option<WaitidStatus> { let status = status.assume_init(); + // `si_pid` is supposedly the better way to check that the struct has been + // filled, e.g. the Linux manpage says about the `WNOHANG` case “zero out + // the si_pid field before the call and check for a nonzero value”. + // But e.g. NetBSD/OpenBSD don't have it exposed in the libc crate for now, and + // some platforms don't have it at all. For simplicity, always check + // `si_signo`. We have zero-initialized the whole struct, and all kernels + // should set `SIGCHLD` here. if status.si_signo == 0 { None } else { @@ -502,6 +528,16 @@ pub(crate) fn exit_group(code: c::c_int) -> ! { } } +#[cfg(not(any(target_os = "redox", target_os = "wasi")))] +#[inline] +pub(crate) fn getsid(pid: Option<Pid>) -> io::Result<Pid> { + unsafe { + let pid = ret_pid_t(c::getsid(Pid::as_raw(pid) as _))?; + debug_assert_ne!(pid, 0); + Ok(Pid::from_raw_nonzero(RawNonZeroPid::new_unchecked(pid))) + } +} + #[cfg(not(target_os = "wasi"))] #[inline] pub(crate) fn setsid() -> io::Result<Pid> { @@ -535,6 +571,24 @@ pub(crate) fn kill_current_process_group(sig: Signal) -> io::Result<()> { unsafe { ret(c::kill(0, sig as i32)) } } +#[cfg(not(target_os = "wasi"))] +#[inline] +pub(crate) fn test_kill_process(pid: Pid) -> io::Result<()> { + unsafe { ret(c::kill(pid.as_raw_nonzero().get(), 0)) } +} + +#[cfg(not(target_os = "wasi"))] +#[inline] +pub(crate) fn test_kill_process_group(pid: Pid) -> io::Result<()> { + unsafe { ret(c::kill(pid.as_raw_nonzero().get().wrapping_neg(), 0)) } +} + +#[cfg(not(target_os = "wasi"))] +#[inline] +pub(crate) fn test_kill_current_process_group() -> io::Result<()> { + unsafe { ret(c::kill(0, 0)) } +} + #[cfg(any(target_os = "android", target_os = "linux"))] #[inline] pub(crate) unsafe fn prctl( @@ -561,10 +615,36 @@ pub(crate) unsafe fn procctl( #[cfg(target_os = "linux")] pub(crate) fn pidfd_open(pid: Pid, flags: PidfdFlags) -> io::Result<OwnedFd> { unsafe { - syscall_ret_owned_fd(libc::syscall( + syscall_ret_owned_fd(c::syscall( c::SYS_pidfd_open, pid.as_raw_nonzero().get(), flags.bits(), )) } } + +#[cfg(not(target_os = "wasi"))] +pub(crate) fn getgroups(buf: &mut [Gid]) -> io::Result<usize> { + let len = buf.len().try_into().map_err(|_| io::Errno::NOMEM)?; + + unsafe { ret_usize(c::getgroups(len, buf.as_mut_ptr().cast()) as isize) } +} + +#[cfg(any(target_os = "android", target_os = "linux"))] +pub(crate) fn sysinfo() -> Sysinfo { + let mut info = MaybeUninit::<Sysinfo>::uninit(); + unsafe { + ret_infallible(c::sysinfo(info.as_mut_ptr())); + info.assume_init() + } +} + +#[cfg(not(any(target_os = "emscripten", target_os = "redox", target_os = "wasi")))] +pub(crate) fn sethostname(name: &[u8]) -> io::Result<()> { + unsafe { + ret(c::sethostname( + name.as_ptr().cast(), + name.len().try_into().map_err(|_| io::Errno::INVAL)?, + )) + } +} |