mirror of
https://sourceware.org/git/glibc.git
synced 2025-11-03 20:53:13 +03:00
55 lines
1.8 KiB
C
55 lines
1.8 KiB
C
/* Copyright (C) 1993-2014 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 <sys/types.h>
|
|
#include <sys/wait.h>
|
|
#include <errno.h>
|
|
#include <hurd.h>
|
|
#include <hurd/port.h>
|
|
|
|
pid_t
|
|
__wait4 (pid_t pid, __WAIT_STATUS_DEFN stat_loc, int options,
|
|
struct rusage *usage)
|
|
{
|
|
pid_t dead;
|
|
error_t err;
|
|
struct rusage ignored;
|
|
int sigcode;
|
|
int dummy;
|
|
|
|
err = __USEPORT (PROC, __proc_wait (port, pid, options,
|
|
stat_loc ?: &dummy, &sigcode,
|
|
usage ?: &ignored, &dead));
|
|
switch (err)
|
|
{
|
|
case 0: /* Got a child. */
|
|
return dead;
|
|
case EAGAIN:
|
|
/* The RPC returns this error when the WNOHANG flag is set and no
|
|
selected children are dead (but some are living). In that
|
|
situation, our return value is zero. (The RPC can't return zero
|
|
for DEAD without also returning some garbage for the other out
|
|
parameters, so an error return is much more natural here. Hence
|
|
the difference between the RPC and the POSIX.1 interface. */
|
|
return (pid_t) 0;
|
|
default:
|
|
return (pid_t) __hurd_fail (err);
|
|
}
|
|
}
|
|
|
|
weak_alias (__wait4, wait4)
|