sysdeps/unix/sysv/linux/aio_sigqueue.c

   1 /* Copyright (C) 1997, 1998, 1999, 2000 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 <aio.h>
  20 #include <errno.h>
  21 #include <signal.h>
  22 #include <unistd.h>
  23 #include <string.h>
  24
  25 #include <sysdep.h>
  26 #include <sys/syscall.h>
  27
  28 #include "aio_misc.h"
  29
  30 #ifdef __NR_rt_sigqueueinfo
  31 extern int __syscall_rt_sigqueueinfo (int, int, siginfo_t *__unbounded);
  32
  33
  34 /* Return any pending signal or wait for one for the given time.  */
  35 int
  36 __aio_sigqueue (sig, val, caller_pid)
  37      int sig;
  38      const union sigval val;
  39      pid_t caller_pid;
  40 {
  41   siginfo_t info;
  42
  43   /* First, clear the siginfo_t structure, so that we don't pass our
  44      stack content to other tasks.  */
  45   memset (&info, 0, sizeof (siginfo_t));
  46   /* We must pass the information about the data in a siginfo_t value.  */
  47   info.si_signo = sig;
  48   info.si_code = SI_ASYNCIO;
  49   info.si_pid = caller_pid;
  50   info.si_uid = getuid ();
  51   info.si_value = val;
  52
  53   return INLINE_SYSCALL (rt_sigqueueinfo, 3, info.si_pid,
  54                          sig, __ptrvalue (&info));
  55 }
  56 #else
  57 # include <sysdeps/generic/aio_sigqueue.c>
  58 #endif