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glibc  2.9
waitpid.c
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00001 /* Copyright (C) 1991,95,96,97,2002 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 #include <errno.h>
00020 #include <sys/wait.h>
00021 #include <sys/types.h>
00022 #include <stddef.h>
00023 
00024 /* Wait for a child matching PID to die.
00025    If PID is greater than 0, match any process whose process ID is PID.
00026    If PID is (pid_t) -1, match any process.
00027    If PID is (pid_t) 0, match any process with the
00028    same process group as the current process.
00029    If PID is less than -1, match any process whose
00030    process group is the absolute value of PID.
00031    If the WNOHANG bit is set in OPTIONS, and that child
00032    is not already dead, return (pid_t) 0.  If successful,
00033    return PID and store the dead child's status in STAT_LOC.
00034    Return (pid_t) -1 for errors.  If the WUNTRACED bit is set in OPTIONS,
00035    return status for stopped children; otherwise don't.  */
00036 pid_t
00037 __libc_waitpid (pid_t pid, int *stat_loc, int options)
00038 {
00039   return __wait4 (pid, (union wait *) stat_loc, options, NULL);
00040 }
00041 
00042 weak_alias (__libc_waitpid, __waitpid)
00043 libc_hidden_weak (__waitpid)
00044 weak_alias (__libc_waitpid, waitpid)