sysdeps/unix/sysv/linux/sigqueue.c

   1 /* Copyright (C) 1997, 1998 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 Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    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    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 #include <signal.h>
  20 #include <unistd.h>
  21
  22 extern int __syscall_rt_sigqueueinfo (int, int, siginfo_t *);
  23
  24 /* These variables are used quite often in the libc code.  */
  25 extern pid_t __libc_pid;
  26
  27
  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   /* We must pass the information about the data in a siginfo_t value.  */
  38   info.si_signo = sig;
  39   info.si_errno = 0;
  40   info.si_code = SI_QUEUE;
  41
  42   if (__libc_pid == 0xf00baa)
  43     __libc_pid = __getpid ();
  44   info.si_pid = __libc_pid;
  45
  46   info.si_uid = __getuid ();
  47   info.si_value = val;
  48
  49   return __syscall_rt_sigqueueinfo (pid, sig, &info);
  50 }
  51 weak_alias (__sigqueue, sigqueue)