sysdeps/unix/sysv/linux/sigqueue.c

   1 /* Copyright (C) 1997, 1998, 2000, 2003, 2005 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   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, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <errno.h>
  20 #include <signal.h>
  21 #include <unistd.h>
  22 #include <string.h>
  23
  24 #include <sysdep.h>
  25 #include <sys/syscall.h>
  26
  27 #ifdef __NR_rt_sigqueueinfo
  28 /* Return any pending signal or wait for one for the given time.  */
  29 int
  30 __sigqueue (pid, sig, val)
  31      pid_t pid;
  32      int sig;
  33      const union sigval val;
  34 {
  35   siginfo_t info;
  36
  37   /* First, clear the siginfo_t structure, so that we don't pass our
  38      stack content to other tasks.  */
  39   memset (&info, 0, sizeof (siginfo_t));
  40   /* We must pass the information about the data in a siginfo_t value.  */
  41   info.si_signo = sig;
  42   info.si_code = SI_QUEUE;
  43   info.si_pid = __getpid ();
  44   info.si_uid = __getuid ();
  45   info.si_value = val;
  46
  47   return INLINE_SYSCALL (rt_sigqueueinfo, 3, pid, sig, __ptrvalue (&info));
  48 }
  49 weak_alias (__sigqueue, sigqueue)
  50 #else
  51 # include <signal/sigqueue.c>
  52 #endif