[thirdparty/glibc.git] / sysdeps / unix / sysv / linux / i386 / semctl.c

/* Copyright (C) 1995-2013 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;

  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,
			 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;

  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 | __IPC_64,
			 CHECK_SEMCTL (&arg, semid, cmd | __IPC_64));
}

versioned_symbol (libc, __new_semctl, semctl, GLIBC_2_2);
Commit	Line	Data
568035b7	1	/* Copyright (C) 1995-2013 Free Software Foundation, Inc.
cd090f71 UD	2	This file is part of the GNU C Library.
	3	Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
	4
	5	The GNU C Library is free software; you can redistribute it and/or
41bdb6e2 AJ	6	modify it under the terms of the GNU Lesser General Public
	7	License as published by the Free Software Foundation; either
	8	version 2.1 of the License, or (at your option) any later version.
cd090f71 UD	9
	10	The GNU C Library is distributed in the hope that it will be useful,
	11	but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
41bdb6e2	13	Lesser General Public License for more details.
cd090f71	14
41bdb6e2	15	You should have received a copy of the GNU Lesser General Public
59ba27a6 PE	16	License along with the GNU C Library; if not, see
59ba27a6 PE	17	<http://www.gnu.org/licenses/>. */
cd090f71 UD	18
	19	#include <errno.h>
	20	#include <stdarg.h>
	21	#include <sys/sem.h>
	22	#include <ipc_priv.h>
	23
	24	#include <sysdep.h>
	25	#include <string.h>
	26	#include <sys/syscall.h>
	27
b5567b2a	28	#include <shlib-compat.h>
cd090f71 UD	29
	30	struct __old_semid_ds
	31	{
	32	struct __old_ipc_perm sem_perm; /* operation permission struct */
	33	__time_t sem_otime; /* last semop() time */
	34	__time_t sem_ctime; /* last time changed by semctl() */
	35	struct sem __sembase; / ptr to first semaphore in array */
	36	struct sem_queue __sem_pending; / pending operations */
	37	struct sem_queue __sem_pending_last; / last pending operation */
	38	struct sem_undo __undo; / ondo requests on this array */
	39	unsigned short int sem_nsems; /* number of semaphores in set */
	40	};
	41
	42	/* Define a `union semun' suitable for Linux here. */
	43	union semun
	44	{
	45	int val; /* value for SETVAL */
	46	struct semid_ds buf; / buffer for IPC_STAT & IPC_SET */
	47	unsigned short int array; / array for GETALL & SETALL */
	48	struct seminfo __buf; / buffer for IPC_INFO */
d347a4ab	49	struct __old_semid_ds *__old_buf;
cd090f71 UD	50	};
cd090f71 UD	51
d25c879d GM	52	#include <bp-checks.h>
	53	#include <bp-semctl.h> /* definition of CHECK_SEMCTL needs union semum */
	54
cd090f71 UD	55	/* Return identifier for array of NSEMS semaphores associated with
cd090f71 UD	56	KEY. */
b5567b2a	57	#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2)
cd090f71	58	int __old_semctl (int semid, int semnum, int cmd, ...);
b5567b2a	59	#endif
cd090f71 UD	60	int __new_semctl (int semid, int semnum, int cmd, ...);
cd090f71 UD	61
b5567b2a	62	#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_2)
cd090f71	63	int
4a381a81	64	attribute_compat_text_section
cd090f71 UD	65	__old_semctl (int semid, int semnum, int cmd, ...)
	66	{
	67	union semun arg;
	68	va_list ap;
	69
	70	va_start (ap, cmd);
	71
	72	/* Get the argument. */
	73	arg = va_arg (ap, union semun);
	74
	75	va_end (ap);
	76
d25c879d GM	77	return INLINE_SYSCALL (ipc, 5, IPCOP_semctl, semid, semnum, cmd,
d25c879d GM	78	CHECK_SEMCTL (&arg, semid, cmd));
cd090f71	79	}
b5567b2a UD	80	compat_symbol (libc, __old_semctl, semctl, GLIBC_2_0);
b5567b2a UD	81	#endif
cd090f71 UD	82
	83	int
	84	__new_semctl (int semid, int semnum, int cmd, ...)
	85	{
	86	union semun arg;
	87	va_list ap;
	88
	89	va_start (ap, cmd);
	90
	91	/* Get the argument. */
	92	arg = va_arg (ap, union semun);
	93
	94	va_end (ap);
	95
d25c879d GM	96	return INLINE_SYSCALL (ipc, 5, IPCOP_semctl, semid, semnum, cmd \| __IPC_64,
d25c879d GM	97	CHECK_SEMCTL (&arg, semid, cmd \| __IPC_64));
cd090f71 UD	98	}
cd090f71 UD	99
b5567b2a	100	versioned_symbol (libc, __new_semctl, semctl, GLIBC_2_2);