/* Checking macros for unistd functions.
   Copyright (C) 2005 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   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, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#ifndef _UNISTD_H
# error "Never include <bits/unistd.h> directly; use <unistd.h> instead."
#endif

extern void __chk_fail (void) __attribute__((__noreturn__));
extern ssize_t __REDIRECT (__read_alias, (int __fd, void *__buf,
					  size_t __nbytes), read) __wur;

extern __always_inline __wur ssize_t
read (int __fd, void *__buf, size_t __nbytes)
{
  if (__bos0 (__buf) != (size_t) -1 && __nbytes > __bos0 (__buf))
    __chk_fail ();
  return __read_alias (__fd, __buf, __nbytes);
}

#ifdef __USE_UNIX98
extern ssize_t __REDIRECT (__pread_alias,
			   (int __fd, void *__buf, size_t __nbytes,
			    __off_t __offset), pread) __wur;
extern ssize_t __REDIRECT (__pread64_alias,
			   (int __fd, void *__buf, size_t __nbytes,
			    __off64_t __offset), pread64) __wur;

# ifndef __USE_FILE_OFFSET64
extern __always_inline __wur ssize_t
pread (int __fd, void *__buf, size_t __nbytes, __off_t __offset)
{
  if (__bos0 (__buf) != (size_t) -1 && __nbytes > __bos0 (__buf))
    __chk_fail ();
  return __pread_alias (__fd, __buf, __nbytes, __offset);
}
# else
extern __always_inline __wur ssize_t
pread (int __fd, void *__buf, size_t __nbytes, __off_t __offset)
{
  if (__bos0 (__buf) != (size_t) -1 && __nbytes > __bos0 (__buf))
    __chk_fail ();
  return __pread64_alias (__fd, __buf, __nbytes, __offset);
}
# endif

# ifdef __USE_LARGEFILE64
extern __always_inline __wur ssize_t
pread64 (int __fd, void *__buf, size_t __nbytes, __off64_t __offset)
{
  if (__bos0 (__buf) != (size_t) -1 && __nbytes > __bos0 (__buf))
    __chk_fail ();
  return __pread64_alias (__fd, __buf, __nbytes, __offset);
}
# endif
#endif

#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K
extern int __REDIRECT_NTH (__readlink_alias,
			   (__const char *__restrict __path,
			    char *__restrict __buf, size_t __len), readlink)
     __nonnull ((1, 2)) __wur;

extern __always_inline __nonnull ((1, 2)) __wur int
__NTH (readlink (__const char *__restrict __path, char *__restrict __buf,
		 size_t __len))
{
  if (__bos (__buf) != (size_t) -1 && __len > __bos (__buf))
    __chk_fail ();
  return __readlink_alias (__path, __buf, __len);
}
#endif

extern char *__REDIRECT_NTH (__getcwd_alias,
			     (char *__buf, size_t __size), getcwd) __wur;

extern __always_inline __wur char *
__NTH (getcwd (char *__buf, size_t __size))
{
  if (__bos (__buf) != (size_t) -1 && __size > __bos (__buf))
    __chk_fail ();
  return __getcwd_alias (__buf, __size);
}