| /* Copyright (C) 1991-2016 Free Software Foundation, Inc. | 
 |    This file is part of the GNU C Library. | 
 |  | 
 |    The GNU C Library is free software; you can redistribute it and/or | 
 |    modify it under the terms of the GNU Lesser General Public | 
 |    License as published by the Free Software Foundation; either | 
 |    version 2.1 of the License, or (at your option) any later version. | 
 |  | 
 |    The GNU C Library is distributed in the hope that it will be useful, | 
 |    but WITHOUT ANY WARRANTY; without even the implied warranty of | 
 |    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU | 
 |    Lesser General Public License for more details. | 
 |  | 
 |    You should have received a copy of the GNU Lesser General Public | 
 |    License along with the GNU C Library; if not, see | 
 |    <http://www.gnu.org/licenses/>.  */ | 
 |  | 
 | #include <errno.h> | 
 | #include <sys/wait.h> | 
 | #include <sys/types.h> | 
 |  | 
 | /* Wait for a child to exit.  When one does, put its status in *STAT_LOC and | 
 |    return its process ID.  For errors return (pid_t) -1.  If USAGE is not nil, | 
 |    store information about the child's resource usage (as a `struct rusage') | 
 |    there.  If the WUNTRACED bit is set in OPTIONS, return status for stopped | 
 |    children; otherwise don't.  */ | 
 | pid_t | 
 | __wait3 (__WAIT_STATUS_DEFN stat_loc, int options, struct rusage *usage) | 
 | { | 
 |   if ((options & ~(WNOHANG|WUNTRACED)) != 0) | 
 |     { | 
 |       __set_errno (EINVAL); | 
 |       return (pid_t) -1; | 
 |     } | 
 |  | 
 |   __set_errno (ENOSYS); | 
 |   return (pid_t) -1; | 
 | } | 
 | stub_warning (wait3) | 
 |  | 
 | weak_alias (__wait3, wait3) |