diff options
Diffstat (limited to 'REORG.TODO/sysdeps/unix/sysv/linux/pthread_sigqueue.c')
-rw-r--r-- | REORG.TODO/sysdeps/unix/sysv/linux/pthread_sigqueue.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/pthread_sigqueue.c b/REORG.TODO/sysdeps/unix/sysv/linux/pthread_sigqueue.c new file mode 100644 index 0000000000..c73b92e2da --- /dev/null +++ b/REORG.TODO/sysdeps/unix/sysv/linux/pthread_sigqueue.c @@ -0,0 +1,73 @@ +/* Copyright (C) 2009-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@redhat.com>, 2009. + + 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 + <http://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> + + +int +pthread_sigqueue (pthread_t threadid, int signo, const union sigval value) +{ +#ifdef __NR_rt_tgsigqueueinfo + struct pthread *pd = (struct pthread *) threadid; + + /* Make sure the descriptor is valid. */ + if (DEBUGGING_P && INVALID_TD_P (pd)) + /* Not a valid thread handle. */ + return ESRCH; + + /* 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. */ + INTERNAL_SYSCALL_DECL (err); + + int val = INTERNAL_SYSCALL_CALL (rt_tgsigqueueinfo, err, pid, tid, signo, + &info); + return (INTERNAL_SYSCALL_ERROR_P (val, err) + ? INTERNAL_SYSCALL_ERRNO (val, err) : 0); +#else + return ENOSYS; +#endif +} |