mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-30 00:31:08 +00:00
71 lines
2.3 KiB
C
71 lines
2.3 KiB
C
/* Copyright (C) 2009-2023 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <errno.h>
|
|
#include <signal.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <pthreadP.h>
|
|
#include <tls.h>
|
|
#include <sysdep.h>
|
|
#include <shlib-compat.h>
|
|
|
|
int
|
|
__pthread_sigqueue (pthread_t threadid, int signo, const union sigval value)
|
|
{
|
|
#ifdef __NR_rt_tgsigqueueinfo
|
|
struct pthread *pd = (struct pthread *) threadid;
|
|
|
|
/* Force load of pd->tid into local variable or register. Otherwise
|
|
if a thread exits between ESRCH test and tgkill, we might return
|
|
EINVAL, because pd->tid would be cleared by the kernel. */
|
|
pid_t tid = atomic_forced_read (pd->tid);
|
|
if (__glibc_unlikely (tid <= 0))
|
|
/* Not a valid thread handle. */
|
|
return ESRCH;
|
|
|
|
/* Disallow sending the signal we use for cancellation, timers,
|
|
for the setxid implementation. */
|
|
if (signo == SIGCANCEL || signo == SIGTIMER || signo == SIGSETXID)
|
|
return EINVAL;
|
|
|
|
pid_t pid = getpid ();
|
|
|
|
/* Set up the siginfo_t structure. */
|
|
siginfo_t info;
|
|
memset (&info, '\0', sizeof (siginfo_t));
|
|
info.si_signo = signo;
|
|
info.si_code = SI_QUEUE;
|
|
info.si_pid = pid;
|
|
info.si_uid = __getuid ();
|
|
info.si_value = value;
|
|
|
|
/* We have a special syscall to do the work. */
|
|
int val = INTERNAL_SYSCALL_CALL (rt_tgsigqueueinfo, pid, tid, signo,
|
|
&info);
|
|
return (INTERNAL_SYSCALL_ERROR_P (val)
|
|
? INTERNAL_SYSCALL_ERRNO (val) : 0);
|
|
#else
|
|
return ENOSYS;
|
|
#endif
|
|
}
|
|
versioned_symbol (libc, __pthread_sigqueue, pthread_sigqueue, GLIBC_2_34);
|
|
|
|
#if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_11, GLIBC_2_34)
|
|
compat_symbol (libpthread, __pthread_sigqueue, pthread_sigqueue, GLIBC_2_11);
|
|
#endif
|