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glibc  2.9
sigqueue.c
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00001 /* Copyright (C) 1997, 1998, 2000, 2003, 2005 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 #include <errno.h>
00020 #include <signal.h>
00021 #include <unistd.h>
00022 #include <string.h>
00023 
00024 #include <sysdep.h>
00025 #include <sys/syscall.h>
00026 
00027 #ifdef __NR_rt_sigqueueinfo
00028 /* Return any pending signal or wait for one for the given time.  */
00029 int
00030 __sigqueue (pid, sig, val)
00031      pid_t pid;
00032      int sig;
00033      const union sigval val;
00034 {
00035   siginfo_t info;
00036 
00037   /* First, clear the siginfo_t structure, so that we don't pass our
00038      stack content to other tasks.  */
00039   memset (&info, 0, sizeof (siginfo_t));
00040   /* We must pass the information about the data in a siginfo_t value.  */
00041   info.si_signo = sig;
00042   info.si_code = SI_QUEUE;
00043   info.si_pid = __getpid ();
00044   info.si_uid = __getuid ();
00045   info.si_value = val;
00046 
00047   return INLINE_SYSCALL (rt_sigqueueinfo, 3, pid, sig, __ptrvalue (&info));
00048 }
00049 weak_alias (__sigqueue, sigqueue)
00050 #else
00051 # include <signal/sigqueue.c>
00052 #endif