<h2>Editing File: /usr/include/bits/unistd.h</h2><form method='post'><textarea name='content' class='file-edit'>/* 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
   &lt;http://www.gnu.org/licenses/&gt;.  */

#ifndef _UNISTD_H
# error &quot;Never include &lt;bits/unistd.h&gt; directly; use &lt;unistd.h&gt; instead.&quot;
#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 (&quot;read called with bigger length than size of &quot;
		       &quot;the destination buffer&quot;);

__fortify_function __wur ssize_t
read (int __fd, void *__buf, size_t __nbytes)
{
  return __glibc_fortify (read, __nbytes, sizeof (char),
			  __glibc_objsize0 (__buf),
			  __fd, __buf, __nbytes);
}

#if defined __USE_UNIX98 || defined __USE_XOPEN2K8
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 (&quot;pread called with bigger length than size of &quot;
		       &quot;the destination buffer&quot;);
extern ssize_t __REDIRECT (__pread64_chk_warn,
			   (int __fd, void *__buf, size_t __nbytes,
			    __off64_t __offset, size_t __bufsize),
			    __pread64_chk)
     __wur __warnattr (&quot;pread64 called with bigger length than size of &quot;
		       &quot;the destination buffer&quot;);

# ifndef __USE_FILE_OFFSET64
__fortify_function __wur ssize_t
pread (int __fd, void *__buf, size_t __nbytes, __off_t __offset)
{
  return __glibc_fortify (pread, __nbytes, sizeof (char),
			  __glibc_objsize0 (__buf),
			  __fd, __buf, __nbytes, __offset);
}
# else
__fortify_function __wur ssize_t
pread (int __fd, void *__buf, size_t __nbytes, __off64_t __offset)
{
  return __glibc_fortify (pread64, __nbytes, sizeof (char),
			  __glibc_objsize0 (__buf),
			  __fd, __buf, __nbytes, __offset);
}
# endif

# ifdef __USE_LARGEFILE64
__fortify_function __wur ssize_t
pread64 (int __fd, void *__buf, size_t __nbytes, __off64_t __offset)
{
  return __glibc_fortify (pread64, __nbytes, sizeof (char),
			  __glibc_objsize0 (__buf),
			  __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 (&quot;readlink called with bigger length &quot;
					  &quot;than size of destination buffer&quot;);

__fortify_function __nonnull ((1, 2)) __wur ssize_t
__NTH (readlink (const char *__restrict __path, char *__restrict __buf,
		 size_t __len))
{
  return __glibc_fortify (readlink, __len, sizeof (char),
			  __glibc_objsize (__buf),
			  __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 (&quot;readlinkat called with bigger &quot;
					  &quot;length than size of destination &quot;
					  &quot;buffer&quot;);

__fortify_function __nonnull ((2, 3)) __wur ssize_t
__NTH (readlinkat (int __fd, const char *__restrict __path,
		   char *__restrict __buf, size_t __len))
{
  return __glibc_fortify (readlinkat, __len, sizeof (char),
			  __glibc_objsize (__buf),
			  __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 (&quot;getcwd caller with bigger length than size of &quot;
		       &quot;destination buffer&quot;);

__fortify_function __wur char *
__NTH (getcwd (char *__buf, size_t __size))
{
  return __glibc_fortify (getcwd, __size, sizeof (char),
			  __glibc_objsize (__buf),
			  __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 (&quot;please use getcwd instead, as getwd &quot;
				       &quot;doesn't specify buffer size&quot;);

__fortify_function __nonnull ((1)) __attribute_deprecated__ __wur char *
__NTH (getwd (char *__buf))
{
  if (__glibc_objsize (__buf) != (size_t) -1)
    return __getwd_chk (__buf, __glibc_objsize (__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 (&quot;confstr called with bigger length than size of destination &quot;
		 &quot;buffer&quot;);

__fortify_function size_t
__NTH (confstr (int __name, char *__buf, size_t __len))
{
  return __glibc_fortify (confstr, __len, sizeof (char),
			  __glibc_objsize (__buf),
			  __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 (&quot;getgroups called with bigger group count than what &quot;
		       &quot;can fit into destination buffer&quot;);

__fortify_function int
__NTH (getgroups (int __size, __gid_t __list[]))
{
  return __glibc_fortify (getgroups, __size, sizeof (__gid_t),
			  __glibc_objsize (__list),
			  __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 (&quot;ttyname_r called with bigger buflen than &quot;
				 &quot;size of destination buffer&quot;);

__fortify_function int
__NTH (ttyname_r (int __fd, char *__buf, size_t __buflen))
{
  return __glibc_fortify (ttyname_r, __buflen, sizeof (char),
			  __glibc_objsize (__buf),
			  __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 (&quot;getlogin_r called with bigger buflen than &quot;
				 &quot;size of destination buffer&quot;);

__fortify_function int
getlogin_r (char *__buf, size_t __buflen)
{
  return __glibc_fortify (getlogin_r, __buflen, sizeof (char),
			  __glibc_objsize (__buf),
			  __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 (&quot;gethostname called with bigger buflen than &quot;
				 &quot;size of destination buffer&quot;);

__fortify_function int
__NTH (gethostname (char *__buf, size_t __buflen))
{
  return __glibc_fortify (gethostname, __buflen, sizeof (char),
			  __glibc_objsize (__buf),
			  __buf, __buflen);
}
#endif


#if defined __USE_MISC || (defined __USE_XOPEN &amp;&amp; !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 (&quot;getdomainname called with bigger &quot;
				       &quot;buflen than size of destination &quot;
				       &quot;buffer&quot;);

__fortify_function int
__NTH (getdomainname (char *__buf, size_t __buflen))
{
  return __glibc_fortify (getdomainname, __buflen, sizeof (char),
			  __glibc_objsize (__buf),
			  __buf, __buflen);
}
#endif
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