libpthread/nptl/sysdeps/unix/sysv/linux/raise.c

   1 /* Copyright (C) 2002-2016 Free Software Foundation, Inc.
   2    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <limits.h>
  20 #include <signal.h>
  21 #include <sysdep.h>
  22 #include <internal-signals.h>
  23
  24 int
  25 raise (int sig)
  26 {
  27   /* rt_sigprocmask may fail if:
  28
  29      1. sigsetsize != sizeof (sigset_t) (EINVAL)
  30      2. a failure in copy from/to user space (EFAULT)
  31      3. an invalid 'how' operation (EINVAL)
  32
  33      The first case is already handle in glibc syscall call by using the arch
  34      defined _NSIG.  Second case is handled by using a stack allocated mask.
  35      The last one should be handled by the block/unblock functions.  */
  36
  37   sigset_t set;
  38   __libc_signal_block_app (&set);
  39
  40   INTERNAL_SYSCALL_DECL (err);
  41   pid_t pid = INTERNAL_SYSCALL (getpid, err, 0);
  42   pid_t tid = INTERNAL_SYSCALL (gettid, err, 0);
  43
  44   int ret = INLINE_SYSCALL (tgkill, 3, pid, tid, sig);
  45
  46   __libc_signal_restore_set (&set);
  47
  48   return ret;
  49 }
  50 libc_hidden_def (raise)