projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| d4697bc9 | 1 | /* Copyright (C) 1993-2014 Free Software Foundation, Inc. |
| ebbad4cc | 2 | This file is part of the GNU C Library. |
| 28f540f4 | 3 | |
| ebbad4cc | 4 | The GNU C Library is free software; you can redistribute it and/or |
| 41bdb6e2 AJ |
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. | |
| 28f540f4 | 8 | |
| ebbad4cc UD |
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 | |
| 41bdb6e2 | 12 | Lesser General Public License for more details. |
| 28f540f4 | 13 | |
| 41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
| 59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
| 16 | <http://www.gnu.org/licenses/>. */ | |
| 28f540f4 | 17 | |
| 28f540f4 RM |
18 | #include <sys/types.h> |
| 19 | #include <sys/wait.h> | |
| 20 | #include <errno.h> | |
| 21 | #include <hurd.h> | |
| 22 | #include <hurd/port.h> | |
| 23 | ||
| 24 | pid_t | |
| 66715f83 UD |
25 | __wait4 (pid_t pid, __WAIT_STATUS_DEFN stat_loc, int options, |
| 26 | struct rusage *usage) | |
| 28f540f4 RM |
27 | { |
| 28 | pid_t dead; | |
| 29 | error_t err; | |
| 30 | struct rusage ignored; | |
| b62b62ac | 31 | int sigcode; |
| ce7f605b | 32 | int dummy; |
| ebbad4cc UD |
33 | |
| 34 | err = __USEPORT (PROC, __proc_wait (port, pid, options, | |
| ce7f605b | 35 | stat_loc ?: &dummy, &sigcode, |
| 28f540f4 | 36 | usage ?: &ignored, &dead)); |
| 50b076f4 RM |
37 | switch (err) |
| 38 | { | |
| 39 | case 0: /* Got a child. */ | |
| 40 | return dead; | |
| 41 | case EAGAIN: | |
| 42 | /* The RPC returns this error when the WNOHANG flag is set and no | |
| 43 | selected children are dead (but some are living). In that | |
| 44 | situation, our return value is zero. (The RPC can't return zero | |
| 45 | for DEAD without also returning some garbage for the other out | |
| 46 | parameters, so an error return is much more natural here. Hence | |
| 47 | the difference between the RPC and the POSIX.1 interface. */ | |
| 48 | return (pid_t) 0; | |
| 49 | default: | |
| 50 | return (pid_t) __hurd_fail (err); | |
| 51 | } | |
| 28f540f4 RM |
52 | } |
| 53 | ||
| 54 | weak_alias (__wait4, wait4) |