/* 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