| /* Copyright (C) 1995-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995. |
| |
| 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 <stdarg.h> |
| #include <sys/sem.h> |
| #include <ipc_priv.h> |
| |
| #include <sysdep.h> |
| #include <sys/syscall.h> |
| |
| /* Define a `union semun' suitable for Linux here. */ |
| union semun |
| { |
| int val; /* value for SETVAL */ |
| struct semid_ds *buf; /* buffer for IPC_STAT & IPC_SET */ |
| unsigned short int *array; /* array for GETALL & SETALL */ |
| struct seminfo *__buf; /* buffer for IPC_INFO */ |
| }; |
| |
| /* Return identifier for array of NSEMS semaphores associated with |
| KEY. */ |
| |
| int |
| semctl (int semid, int semnum, int cmd, ...) |
| { |
| union semun arg; |
| va_list ap; |
| |
| va_start (ap, cmd); |
| |
| /* Get the argument. */ |
| arg = va_arg (ap, union semun); |
| |
| va_end (ap); |
| |
| return INLINE_SYSCALL (ipc, 5, IPCOP_semctl, semid, semnum, cmd, |
| arg.array); |
| } |
