/* Checking macros for unistd functions.

   Copyright (C) 2005-2018 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, see

   <http://www.gnu.org/licenses/>.  */

#ifndef _UNISTD_H

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

#endif

extern ssize_t __read_chk (int __fd, void *__buf, size_t __nbytes,

			   size_t __buflen) __wur;

extern ssize_t __REDIRECT (__read_alias, (int __fd, void *__buf,

					  size_t __nbytes), read) __wur;

extern ssize_t __REDIRECT (__read_chk_warn,

			   (int __fd, void *__buf, size_t __nbytes,

			    size_t __buflen), __read_chk)

     __wur __warnattr ("read called with bigger length than size of "

		       "the destination buffer");

__fortify_function __wur ssize_t

read (int __fd, void *__buf, size_t __nbytes)

{

  if (__bos0 (__buf) != (size_t) -1)

    {

      if (!__builtin_constant_p (__nbytes))

	return __read_chk (__fd, __buf, __nbytes, __bos0 (__buf));

      if (__nbytes > __bos0 (__buf))

	return __read_chk_warn (__fd, __buf, __nbytes, __bos0 (__buf));

    }

  return __read_alias (__fd, __buf, __nbytes);

}

#ifdef __USE_UNIX98

extern ssize_t __pread_chk (int __fd, void *__buf, size_t __nbytes,

			    __off_t __offset, size_t __bufsize) __wur;

extern ssize_t __pread64_chk (int __fd, void *__buf, size_t __nbytes,

			      __off64_t __offset, size_t __bufsize) __wur;

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;

extern ssize_t __REDIRECT (__pread_chk_warn,

			   (int __fd, void *__buf, size_t __nbytes,

			    __off_t __offset, size_t __bufsize), __pread_chk)

     __wur __warnattr ("pread called with bigger length than size of "

		       "the destination buffer");

extern ssize_t __REDIRECT (__pread64_chk_warn,

			   (int __fd, void *__buf, size_t __nbytes,

			    __off64_t __offset, size_t __bufsize),

			    __pread64_chk)

     __wur __warnattr ("pread64 called with bigger length than size of "

		       "the destination buffer");

# ifndef __USE_FILE_OFFSET64

__fortify_function __wur ssize_t

pread (int __fd, void *__buf, size_t __nbytes, __off_t __offset)

{

  if (__bos0 (__buf) != (size_t) -1)

    {

      if (!__builtin_constant_p (__nbytes))

	return __pread_chk (__fd, __buf, __nbytes, __offset, __bos0 (__buf));

      if ( __nbytes > __bos0 (__buf))

	return __pread_chk_warn (__fd, __buf, __nbytes, __offset,

				 __bos0 (__buf));

    }

  return __pread_alias (__fd, __buf, __nbytes, __offset);

}

# else

__fortify_function __wur ssize_t

pread (int __fd, void *__buf, size_t __nbytes, __off64_t __offset)

{

  if (__bos0 (__buf) != (size_t) -1)

    {

      if (!__builtin_constant_p (__nbytes))

	return __pread64_chk (__fd, __buf, __nbytes, __offset, __bos0 (__buf));

      if ( __nbytes > __bos0 (__buf))

	return __pread64_chk_warn (__fd, __buf, __nbytes, __offset,

				   __bos0 (__buf));

    }

  return __pread64_alias (__fd, __buf, __nbytes, __offset);

}

# endif

# ifdef __USE_LARGEFILE64

__fortify_function __wur ssize_t

pread64 (int __fd, void *__buf, size_t __nbytes, __off64_t __offset)

{

  if (__bos0 (__buf) != (size_t) -1)

    {

      if (!__builtin_constant_p (__nbytes))

	return __pread64_chk (__fd, __buf, __nbytes, __offset, __bos0 (__buf));

      if ( __nbytes > __bos0 (__buf))

	return __pread64_chk_warn (__fd, __buf, __nbytes, __offset,

				   __bos0 (__buf));

    }

  return __pread64_alias (__fd, __buf, __nbytes, __offset);

}

# endif

#endif

#if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K

extern ssize_t __readlink_chk (const char *__restrict __path,

			       char *__restrict __buf, size_t __len,

			       size_t __buflen)

     __THROW __nonnull ((1, 2)) __wur;

extern ssize_t __REDIRECT_NTH (__readlink_alias,

			       (const char *__restrict __path,

				char *__restrict __buf, size_t __len), readlink)

     __nonnull ((1, 2)) __wur;

extern ssize_t __REDIRECT_NTH (__readlink_chk_warn,

			       (const char *__restrict __path,

				char *__restrict __buf, size_t __len,

				size_t __buflen), __readlink_chk)

     __nonnull ((1, 2)) __wur __warnattr ("readlink called with bigger length "

					  "than size of destination buffer");

__fortify_function __nonnull ((1, 2)) __wur ssize_t

__NTH (readlink (const char *__restrict __path, char *__restrict __buf,

		 size_t __len))

{

  if (__bos (__buf) != (size_t) -1)

    {

      if (!__builtin_constant_p (__len))

	return __readlink_chk (__path, __buf, __len, __bos (__buf));

      if ( __len > __bos (__buf))

	return __readlink_chk_warn (__path, __buf, __len, __bos (__buf));

    }

  return __readlink_alias (__path, __buf, __len);

}

#endif

#ifdef __USE_ATFILE

extern ssize_t __readlinkat_chk (int __fd, const char *__restrict __path,

				 char *__restrict __buf, size_t __len,

				 size_t __buflen)

     __THROW __nonnull ((2, 3)) __wur;

extern ssize_t __REDIRECT_NTH (__readlinkat_alias,

			       (int __fd, const char *__restrict __path,

				char *__restrict __buf, size_t __len),

			       readlinkat)

     __nonnull ((2, 3)) __wur;

extern ssize_t __REDIRECT_NTH (__readlinkat_chk_warn,

			       (int __fd, const char *__restrict __path,

				char *__restrict __buf, size_t __len,

				size_t __buflen), __readlinkat_chk)

     __nonnull ((2, 3)) __wur __warnattr ("readlinkat called with bigger "

					  "length than size of destination "

					  "buffer");

__fortify_function __nonnull ((2, 3)) __wur ssize_t

__NTH (readlinkat (int __fd, const char *__restrict __path,

		   char *__restrict __buf, size_t __len))

{

  if (__bos (__buf) != (size_t) -1)

    {

      if (!__builtin_constant_p (__len))

	return __readlinkat_chk (__fd, __path, __buf, __len, __bos (__buf));

      if (__len > __bos (__buf))

	return __readlinkat_chk_warn (__fd, __path, __buf, __len,

				      __bos (__buf));

    }

  return __readlinkat_alias (__fd, __path, __buf, __len);

}

#endif

extern char *__getcwd_chk (char *__buf, size_t __size, size_t __buflen)

     __THROW __wur;

extern char *__REDIRECT_NTH (__getcwd_alias,

			     (char *__buf, size_t __size), getcwd) __wur;

extern char *__REDIRECT_NTH (__getcwd_chk_warn,

			     (char *__buf, size_t __size, size_t __buflen),

			     __getcwd_chk)

     __wur __warnattr ("getcwd caller with bigger length than size of "

		       "destination buffer");

__fortify_function __wur char *

__NTH (getcwd (char *__buf, size_t __size))

{

  if (__bos (__buf) != (size_t) -1)

    {

      if (!__builtin_constant_p (__size))

	return __getcwd_chk (__buf, __size, __bos (__buf));

      if (__size > __bos (__buf))

	return __getcwd_chk_warn (__buf, __size, __bos (__buf));

    }

  return __getcwd_alias (__buf, __size);

}

#if defined __USE_MISC || defined __USE_XOPEN_EXTENDED

extern char *__getwd_chk (char *__buf, size_t buflen)

     __THROW __nonnull ((1)) __wur;

extern char *__REDIRECT_NTH (__getwd_warn, (char *__buf), getwd)

     __nonnull ((1)) __wur __warnattr ("please use getcwd instead, as getwd "

				       "doesn't specify buffer size");

__fortify_function __nonnull ((1)) __attribute_deprecated__ __wur char *

__NTH (getwd (char *__buf))

{

  if (__bos (__buf) != (size_t) -1)

    return __getwd_chk (__buf, __bos (__buf));

  return __getwd_warn (__buf);

}

#endif

extern size_t __confstr_chk (int __name, char *__buf, size_t __len,

			     size_t __buflen) __THROW;

extern size_t __REDIRECT_NTH (__confstr_alias, (int __name, char *__buf,

						size_t __len), confstr);

extern size_t __REDIRECT_NTH (__confstr_chk_warn,

			      (int __name, char *__buf, size_t __len,

			       size_t __buflen), __confstr_chk)

     __warnattr ("confstr called with bigger length than size of destination "

		 "buffer");

__fortify_function size_t

__NTH (confstr (int __name, char *__buf, size_t __len))

{

  if (__bos (__buf) != (size_t) -1)

    {

      if (!__builtin_constant_p (__len))

	return __confstr_chk (__name, __buf, __len, __bos (__buf));

      if (__bos (__buf) < __len)

	return __confstr_chk_warn (__name, __buf, __len, __bos (__buf));

    }

  return __confstr_alias (__name, __buf, __len);

}

extern int __getgroups_chk (int __size, __gid_t __list[], size_t __listlen)

     __THROW __wur;

extern int __REDIRECT_NTH (__getgroups_alias, (int __size, __gid_t __list[]),

			   getgroups) __wur;

extern int __REDIRECT_NTH (__getgroups_chk_warn,

			   (int __size, __gid_t __list[], size_t __listlen),

			   __getgroups_chk)

     __wur __warnattr ("getgroups called with bigger group count than what "

		       "can fit into destination buffer");

__fortify_function int

__NTH (getgroups (int __size, __gid_t __list[]))

{

  if (__bos (__list) != (size_t) -1)

    {

      if (!__builtin_constant_p (__size) || __size < 0)

	return __getgroups_chk (__size, __list, __bos (__list));

      if (__size * sizeof (__gid_t) > __bos (__list))

	return __getgroups_chk_warn (__size, __list, __bos (__list));

    }

  return __getgroups_alias (__size, __list);

}

extern int __ttyname_r_chk (int __fd, char *__buf, size_t __buflen,

			    size_t __nreal) __THROW __nonnull ((2));

extern int __REDIRECT_NTH (__ttyname_r_alias, (int __fd, char *__buf,

					       size_t __buflen), ttyname_r)

     __nonnull ((2));

extern int __REDIRECT_NTH (__ttyname_r_chk_warn,

			   (int __fd, char *__buf, size_t __buflen,

			    size_t __nreal), __ttyname_r_chk)

     __nonnull ((2)) __warnattr ("ttyname_r called with bigger buflen than "

				 "size of destination buffer");

__fortify_function int

__NTH (ttyname_r (int __fd, char *__buf, size_t __buflen))

{

  if (__bos (__buf) != (size_t) -1)

    {

      if (!__builtin_constant_p (__buflen))

	return __ttyname_r_chk (__fd, __buf, __buflen, __bos (__buf));

      if (__buflen > __bos (__buf))

	return __ttyname_r_chk_warn (__fd, __buf, __buflen, __bos (__buf));

    }

  return __ttyname_r_alias (__fd, __buf, __buflen);

}

#ifdef __USE_POSIX199506

extern int __getlogin_r_chk (char *__buf, size_t __buflen, size_t __nreal)

     __nonnull ((1));

extern int __REDIRECT (__getlogin_r_alias, (char *__buf, size_t __buflen),

		       getlogin_r) __nonnull ((1));

extern int __REDIRECT (__getlogin_r_chk_warn,

		       (char *__buf, size_t __buflen, size_t __nreal),

		       __getlogin_r_chk)

     __nonnull ((1)) __warnattr ("getlogin_r called with bigger buflen than "

				 "size of destination buffer");

__fortify_function int

getlogin_r (char *__buf, size_t __buflen)

{

  if (__bos (__buf) != (size_t) -1)

    {

      if (!__builtin_constant_p (__buflen))

	return __getlogin_r_chk (__buf, __buflen, __bos (__buf));

      if (__buflen > __bos (__buf))

	return __getlogin_r_chk_warn (__buf, __buflen, __bos (__buf));

    }

  return __getlogin_r_alias (__buf, __buflen);

}

#endif

#if defined __USE_MISC || defined __USE_UNIX98

extern int __gethostname_chk (char *__buf, size_t __buflen, size_t __nreal)

     __THROW __nonnull ((1));

extern int __REDIRECT_NTH (__gethostname_alias, (char *__buf, size_t __buflen),

			   gethostname) __nonnull ((1));

extern int __REDIRECT_NTH (__gethostname_chk_warn,

			   (char *__buf, size_t __buflen, size_t __nreal),

			   __gethostname_chk)

     __nonnull ((1)) __warnattr ("gethostname called with bigger buflen than "

				 "size of destination buffer");

__fortify_function int

__NTH (gethostname (char *__buf, size_t __buflen))

{

  if (__bos (__buf) != (size_t) -1)

    {

      if (!__builtin_constant_p (__buflen))

	return __gethostname_chk (__buf, __buflen, __bos (__buf));

      if (__buflen > __bos (__buf))

	return __gethostname_chk_warn (__buf, __buflen, __bos (__buf));

    }

  return __gethostname_alias (__buf, __buflen);

}

#endif

#if defined __USE_MISC || (defined __USE_XOPEN && !defined __USE_UNIX98)

extern int __getdomainname_chk (char *__buf, size_t __buflen, size_t __nreal)

     __THROW __nonnull ((1)) __wur;

extern int __REDIRECT_NTH (__getdomainname_alias, (char *__buf,

						   size_t __buflen),

			   getdomainname) __nonnull ((1)) __wur;

extern int __REDIRECT_NTH (__getdomainname_chk_warn,

			   (char *__buf, size_t __buflen, size_t __nreal),

			   __getdomainname_chk)

     __nonnull ((1)) __wur __warnattr ("getdomainname called with bigger "

				       "buflen than size of destination "

				       "buffer");

__fortify_function int

__NTH (getdomainname (char *__buf, size_t __buflen))

{

  if (__bos (__buf) != (size_t) -1)

    {

      if (!__builtin_constant_p (__buflen))

	return __getdomainname_chk (__buf, __buflen, __bos (__buf));

      if (__buflen > __bos (__buf))

	return __getdomainname_chk_warn (__buf, __buflen, __bos (__buf));

    }

  return __getdomainname_alias (__buf, __buflen);

}

#endif