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fix error handling for pthread_sigmask(3) #93530

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Apr 18, 2022
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6 changes: 3 additions & 3 deletions library/std/src/sys/unix/process/process_common/tests.rs
Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,7 @@ use super::*;
use crate::ffi::OsStr;
use crate::mem;
use crate::ptr;
use crate::sys::cvt;
use crate::sys::{cvt, cvt_nz};

macro_rules! t {
($e:expr) => {
Expand Down Expand Up @@ -39,7 +39,7 @@ fn test_process_mask() {
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())));
t!(cvt_nz(libc::pthread_sigmask(libc::SIG_SETMASK, set.as_ptr(), old_set.as_mut_ptr())));

cmd.stdin(Stdio::MakePipe);
cmd.stdout(Stdio::MakePipe);
Expand All @@ -48,7 +48,7 @@ fn test_process_mask() {
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_nz(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
Expand Down
3 changes: 2 additions & 1 deletion library/std/src/sys/unix/process/process_unix.rs
Original file line number Diff line number Diff line change
Expand Up @@ -324,6 +324,7 @@ impl Command {
#[cfg(not(target_os = "emscripten"))]
{
use crate::mem::MaybeUninit;
use crate::sys::cvt_nz;
// 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
Expand All @@ -333,7 +334,7 @@ impl Command {
// 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()))?;
cvt_nz(libc::pthread_sigmask(libc::SIG_SETMASK, set.as_ptr(), ptr::null_mut()))?;

#[cfg(target_os = "android")] // see issue #88585
{
Expand Down