<h2>Editing File: /usr/include/bits/stdlib.h</h2><form method='post'><textarea name='content' class='file-edit'>/* Checking macros for stdlib 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 _STDLIB_H
# error &quot;Never include &lt;bits/stdlib.h&gt; directly; use &lt;stdlib.h&gt; instead.&quot;
#endif

extern char *__realpath_chk (const char *__restrict __name,
			     char *__restrict __resolved,
			     size_t __resolvedlen) __THROW __wur;
extern char *__REDIRECT_NTH (__realpath_alias,
			     (const char *__restrict __name,
			      char *__restrict __resolved), realpath) __wur;
extern char *__REDIRECT_NTH (__realpath_chk_warn,
			     (const char *__restrict __name,
			      char *__restrict __resolved,
			      size_t __resolvedlen), __realpath_chk) __wur
     __warnattr (&quot;second argument of realpath must be either NULL or at &quot;
		 &quot;least PATH_MAX bytes long buffer&quot;);

__fortify_function __wur char *
__NTH (realpath (const char *__restrict __name, char *__restrict __resolved))
{
  size_t sz = __glibc_objsize (__resolved);

  if (sz == (size_t) -1)
    return __realpath_alias (__name, __resolved);

#if defined _LIBC_LIMITS_H_ &amp;&amp; defined PATH_MAX
  if (__glibc_unsafe_len (PATH_MAX, sizeof (char), sz))
    return __realpath_chk_warn (__name, __resolved, sz);
#endif
  return __realpath_chk (__name, __resolved, sz);
}


extern int __ptsname_r_chk (int __fd, char *__buf, size_t __buflen,
			    size_t __nreal) __THROW __nonnull ((2));
extern int __REDIRECT_NTH (__ptsname_r_alias, (int __fd, char *__buf,
					       size_t __buflen), ptsname_r)
     __nonnull ((2));
extern int __REDIRECT_NTH (__ptsname_r_chk_warn,
			   (int __fd, char *__buf, size_t __buflen,
			    size_t __nreal), __ptsname_r_chk)
     __nonnull ((2)) __warnattr (&quot;ptsname_r called with buflen bigger than &quot;
				 &quot;size of buf&quot;);

__fortify_function int
__NTH (ptsname_r (int __fd, char *__buf, size_t __buflen))
{
  return __glibc_fortify (ptsname_r, __buflen, sizeof (char),
			  __glibc_objsize (__buf),
			  __fd, __buf, __buflen);
}


extern int __wctomb_chk (char *__s, wchar_t __wchar, size_t __buflen)
  __THROW __wur;
extern int __REDIRECT_NTH (__wctomb_alias, (char *__s, wchar_t __wchar),
			   wctomb) __wur;

__fortify_function __wur int
__NTH (wctomb (char *__s, wchar_t __wchar))
{
  /* We would have to include &lt;limits.h&gt; to get a definition of MB_LEN_MAX.
     But this would only disturb the namespace.  So we define our own
     version here.  */
#define __STDLIB_MB_LEN_MAX	16
#if defined MB_LEN_MAX &amp;&amp; MB_LEN_MAX != __STDLIB_MB_LEN_MAX
# error &quot;Assumed value of MB_LEN_MAX wrong&quot;
#endif
  if (__glibc_objsize (__s) != (size_t) -1
      &amp;&amp; __STDLIB_MB_LEN_MAX &gt; __glibc_objsize (__s))
    return __wctomb_chk (__s, __wchar, __glibc_objsize (__s));
  return __wctomb_alias (__s, __wchar);
}


extern size_t __mbstowcs_chk (wchar_t *__restrict __dst,
			      const char *__restrict __src,
			      size_t __len, size_t __dstlen) __THROW;
extern size_t __REDIRECT_NTH (__mbstowcs_alias,
			      (wchar_t *__restrict __dst,
			       const char *__restrict __src,
			       size_t __len), mbstowcs);
extern size_t __REDIRECT_NTH (__mbstowcs_chk_warn,
			      (wchar_t *__restrict __dst,
			       const char *__restrict __src,
			       size_t __len, size_t __dstlen), __mbstowcs_chk)
     __warnattr (&quot;mbstowcs called with dst buffer smaller than len &quot;
		 &quot;* sizeof (wchar_t)&quot;);

__fortify_function size_t
__NTH (mbstowcs (wchar_t *__restrict __dst, const char *__restrict __src,
		 size_t __len))
{
  return __glibc_fortify_n (mbstowcs, __len, sizeof (wchar_t),
			    __glibc_objsize (__dst),
			    __dst, __src, __len);
}


extern size_t __wcstombs_chk (char *__restrict __dst,
			      const wchar_t *__restrict __src,
			      size_t __len, size_t __dstlen) __THROW;
extern size_t __REDIRECT_NTH (__wcstombs_alias,
			      (char *__restrict __dst,
			       const wchar_t *__restrict __src,
			       size_t __len), wcstombs);
extern size_t __REDIRECT_NTH (__wcstombs_chk_warn,
			      (char *__restrict __dst,
			       const wchar_t *__restrict __src,
			       size_t __len, size_t __dstlen), __wcstombs_chk)
     __warnattr (&quot;wcstombs called with dst buffer smaller than len&quot;);

__fortify_function size_t
__NTH (wcstombs (char *__restrict __dst, const wchar_t *__restrict __src,
		 size_t __len))
{
  return __glibc_fortify (wcstombs, __len, sizeof (char),
			  __glibc_objsize (__dst),
			  __dst, __src, __len);
}
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