| /* Copyright (C) 1995-2018 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 <sys/sem.h> |
| #include <stdarg.h> |
| #include <ipc_priv.h> |
| #include <sysdep.h> |
| #include <shlib-compat.h> |
| #include <errno.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 */ |
| }; |
| |
| #ifndef DEFAULT_VERSION |
| # define DEFAULT_VERSION GLIBC_2_2 |
| #endif |
| |
| int |
| __new_semctl (int semid, int semnum, int cmd, ...) |
| { |
| union semun arg = { 0 }; |
| va_list ap; |
| |
| /* Get the argument only if required. */ |
| switch (cmd) |
| { |
| case SETVAL: /* arg.val */ |
| case GETALL: /* arg.array */ |
| case SETALL: |
| case IPC_STAT: /* arg.buf */ |
| case IPC_SET: |
| case SEM_STAT: |
| case IPC_INFO: /* arg.__buf */ |
| case SEM_INFO: |
| va_start (ap, cmd); |
| arg = va_arg (ap, union semun); |
| va_end (ap); |
| break; |
| } |
| |
| #ifdef __ASSUME_DIRECT_SYSVIPC_SYSCALLS |
| return INLINE_SYSCALL_CALL (semctl, semid, semnum, cmd | __IPC_64, |
| arg.array); |
| #else |
| return INLINE_SYSCALL_CALL (ipc, IPCOP_semctl, semid, semnum, cmd | __IPC_64, |
| SEMCTL_ARG_ADDRESS (arg)); |
| #endif |
| } |
| versioned_symbol (libc, __new_semctl, semctl, DEFAULT_VERSION); |
| |
| |
| #if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2) |
| /* Since semctl use a variadic argument for semid_ds there is not need to |
| define and tie the compatibility symbol to the old 'union semun' |
| definition. */ |
| int |
| attribute_compat_text_section |
| __old_semctl (int semid, int semnum, int cmd, ...) |
| { |
| union semun arg = { 0 }; |
| va_list ap; |
| |
| /* Get the argument only if required. */ |
| switch (cmd) |
| { |
| case SETVAL: /* arg.val */ |
| case GETALL: /* arg.array */ |
| case SETALL: |
| case IPC_STAT: /* arg.buf */ |
| case IPC_SET: |
| case SEM_STAT: |
| case IPC_INFO: /* arg.__buf */ |
| case SEM_INFO: |
| va_start (ap, cmd); |
| arg = va_arg (ap, union semun); |
| va_end (ap); |
| break; |
| } |
| |
| # ifdef __ASSUME_DIRECT_SYSVIPC_SYSCALLS |
| return INLINE_SYSCALL_CALL (semctl, semid, semnum, cmd, arg.array); |
| # else |
| return INLINE_SYSCALL_CALL (ipc, IPCOP_semctl, semid, semnum, cmd, |
| SEMCTL_ARG_ADDRESS (arg)); |
| # endif |
| } |
| compat_symbol (libc, __old_semctl, semctl, GLIBC_2_0); |
| #endif |