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 <signal.h>
      19  #include <sysdep-cancel.h>
      20  #include <errno.h>
      21  
      22  int
      23  __sigwait (const sigset_t *set, int *sig)
      24  {
      25    siginfo_t si;
      26    int ret;
      27    do
      28      ret = __sigtimedwait (set, &si, 0);
      29    /* Applications do not expect sigwait to return with EINTR, and the
      30       error code is not specified by POSIX.  */
      31    while (ret < 0 && errno == EINTR);
      32    if (ret < 0)
      33      return errno;
      34    *sig = si.si_signo;
      35    return 0;
      36  }
      37  libc_hidden_def (__sigwait)
      38  weak_alias (__sigwait, sigwait)
      39  strong_alias (__sigwait, __libc_sigwait)