posix/wait3.c

   1 /* Copyright (C) 1991-2016 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    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <sys/wait.h>
  20 #include <sys/types.h>
  21
  22 /* Wait for a child to exit.  When one does, put its status in *STAT_LOC and
  23    return its process ID.  For errors return (pid_t) -1.  If USAGE is not nil,
  24    store information about the child's resource usage (as a `struct rusage')
  25    there.  If the WUNTRACED bit is set in OPTIONS, return status for stopped
  26    children; otherwise don't.  */
  27 pid_t
  28 __wait3 (__WAIT_STATUS_DEFN stat_loc, int options, struct rusage *usage)
  29 {
  30   if ((options & ~(WNOHANG|WUNTRACED)) != 0)
  31     {
  32       __set_errno (EINVAL);
  33       return (pid_t) -1;
  34     }
  35
  36   __set_errno (ENOSYS);
  37   return (pid_t) -1;
  38 }
  39 stub_warning (wait3)
  40
  41 weak_alias (__wait3, wait3)