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[glibc.git] / sysdeps / unix / sysv / linux / wait.c
blob963914aa3fac1c0b0921969996dc769b979da9c8
1 /* Copyright (C) 1991,1995,1996,1997,2002,2003 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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.
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/>. */
18 #include <sys/wait.h>
19 #include <errno.h>
20 #include <sys/resource.h>
21 #include <stddef.h>
22 #include <sysdep-cancel.h>
24 /* Wait for a child to die. When one does, put its status in *STAT_LOC
25 and return its process ID. For errors, return (pid_t) -1. */
26 pid_t
27 __libc_wait (__WAIT_STATUS_DEFN stat_loc)
29 if (SINGLE_THREAD_P)
30 return INLINE_SYSCALL (wait4, 4, WAIT_ANY, stat_loc, 0,
31 (struct rusage *) NULL);
33 int oldtype = LIBC_CANCEL_ASYNC ();
35 pid_t result = INLINE_SYSCALL (wait4, 4, WAIT_ANY, stat_loc, 0,
36 (struct rusage *) NULL);
38 LIBC_CANCEL_RESET (oldtype);
40 return result;
43 weak_alias (__libc_wait, __wait)
44 weak_alias (__libc_wait, wait)