sysdeps/unix/sysv/linux/aio_sigqueue.c

   1 /* Copyright (C) 1997,1998,1999,2000,2003,2005
   2         Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <aio.h>
  21 #include <errno.h>
  22 #include <signal.h>
  23 #include <unistd.h>
  24 #include <string.h>
  25
  26 #include <sysdep.h>
  27 #include <sys/syscall.h>
  28
  29 #include <aio_misc.h>
  30
  31 #ifdef __NR_rt_sigqueueinfo
  32
  33 /* Return any pending signal or wait for one for the given time.  */
  34 int
  35 __aio_sigqueue (sig, val, caller_pid)
  36      int sig;
  37      const union sigval val;
  38      pid_t caller_pid;
  39 {
  40   siginfo_t info;
  41
  42   /* First, clear the siginfo_t structure, so that we don't pass our
  43      stack content to other tasks.  */
  44   memset (&info, 0, sizeof (siginfo_t));
  45   /* We must pass the information about the data in a siginfo_t value.  */
  46   info.si_signo = sig;
  47   info.si_code = SI_ASYNCIO;
  48   info.si_pid = caller_pid;
  49   info.si_uid = getuid ();
  50   info.si_value = val;
  51
  52   return INLINE_SYSCALL (rt_sigqueueinfo, 3, info.si_pid,
  53                          sig, __ptrvalue (&info));
  54 }
  55 #else
  56 # include <rt/aio_sigqueue.c>
  57 #endif