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/* Semctl for architectures where word sized unions are passed indirectly
Copyright (C) 1995-2012 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 <string.h>
#include <sys/syscall.h>
#include <shlib-compat.h>
struct __old_semid_ds
{
struct __old_ipc_perm sem_perm; /* operation permission struct */
__time_t sem_otime; /* last semop() time */
__time_t sem_ctime; /* last time changed by semctl() */
struct sem *__sembase; /* ptr to first semaphore in array */
struct sem_queue *__sem_pending; /* pending operations */
struct sem_queue *__sem_pending_last; /* last pending operation */
struct sem_undo *__undo; /* ondo requests on this array */
unsigned short int sem_nsems; /* number of semaphores in set */
};
/* 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 */
struct __old_semid_ds *__old_buf;
};
#include <bp-checks.h>
#include <bp-semctl.h> /* definition of CHECK_SEMCTL needs union semum */
/* Return identifier for array of NSEMS semaphores associated with
KEY. */
#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2)
int __old_semctl (int semid, int semnum, int cmd, ...);
#endif
int __new_semctl (int semid, int semnum, int cmd, ...);
#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2)
int
attribute_compat_text_section
__old_semctl (int semid, int semnum, int cmd, ...)
{
union semun arg;
va_list ap;
/* Get the argument only if required. */
arg.buf = NULL;
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;
}
return INLINE_SYSCALL (ipc, 5, IPCOP_semctl, semid, semnum, cmd,
CHECK_SEMCTL (&arg, semid, cmd));
}
compat_symbol (libc, __old_semctl, semctl, GLIBC_2_0);
#endif
int
__new_semctl (int semid, int semnum, int cmd, ...)
{
union semun arg;
va_list ap;
/* Get the argument only if required. */
arg.buf = NULL;
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;
}
return INLINE_SYSCALL (ipc, 5, IPCOP_semctl, semid, semnum, cmd | __IPC_64,
CHECK_SEMCTL (&arg, semid, cmd | __IPC_64));
}
versioned_symbol (libc, __new_semctl, semctl, GLIBC_2_2);
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