/* xreadlink.c -- readlink wrapper to return the link name in malloc'd storage

   Copyright (C) 2001, 2003-2007, 2009-2018 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 3 of the License, or

   (at your option) any later version.

   This program 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 General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */

/* Written by Jim Meyering <jim@meyering.net>

   and Bruno Haible <bruno@clisp.org>.  */

#include <config.h>

/* Specification.  */

#include "xreadlink.h"

#include <errno.h>

#include "areadlink.h"

#include "xalloc.h"

/* Call readlink to get the symbolic link value of FILENAME.

   Return a pointer to that NUL-terminated string in malloc'd storage.

   If readlink fails, return NULL and set errno.

   If realloc fails, or if the link value is longer than SIZE_MAX :-),

   give a diagnostic and exit.  */

char *

xreadlink (char const *filename)

{

  char *result = areadlink (filename);

  if (result == NULL && errno == ENOMEM)

    xalloc_die ();

  return result;

}