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Auto merge of #93530 - anonion0:pthread_sigmask_fix, r=JohnTitor

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fix error handling for pthread_sigmask(3)

Errors from `pthread_sigmask(3)` were handled using `cvt()`, which expects a return value of `-1` on error and uses `errno`.
However, `pthread_sigmask(3)` returns `0` on success and an error number otherwise.

Fix it by replacing `cvt()` with `cvt_nz()`.
This commit is contained in:
bors 2022-04-17 22:54:55 +00:00
parent ec77f25243 e6aafbc707
commit e27d9df431
2 changed files with 5 additions and 4 deletions
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6
library/std/src/sys/unix/process/process_common/tests.rs
View file

@ -3,7 +3,7 @@
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) => {
@ -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);
@ -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

3
library/std/src/sys/unix/process/process_unix.rs
View file

@ -328,6 +328,7 @@ unsafe fn do_exec(
#[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
@ -337,7 +338,7 @@ unsafe fn do_exec(
// 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
{