1  /* Copyright (C) 1997-2023 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, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <errno.h>
      19  #include <signal.h>
      20  #include <string.h>
      21  #include <unistd.h>
      22  #include <sysdep.h>
      23  
      24  /* Return any pending signal or wait for one for the given time.  */
      25  int
      26  __sigqueue (pid_t pid, int sig, const union sigval val)
      27  {
      28    siginfo_t info;
      29  
      30    /* First, clear the siginfo_t structure, so that we don't pass our
      31       stack content to other tasks.  */
      32    memset (&info, 0, sizeof (siginfo_t));
      33    /* We must pass the information about the data in a siginfo_t value.  */
      34    info.si_signo = sig;
      35    info.si_code = SI_QUEUE;
      36    info.si_pid = __getpid ();
      37    info.si_uid = __getuid ();
      38    info.si_value = val;
      39  
      40    return INLINE_SYSCALL_CALL (rt_sigqueueinfo, pid, sig, &info);
      41  }
      42  weak_alias (__sigqueue, sigqueue)