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    1: /* xreadlink.c -- readlink wrapper to return the link name in malloc'd storage
    2: 
    3:    Copyright (C) 2001, 2003-2007 Free Software Foundation, Inc.
    4: 
    5:    This program is free software: you can redistribute it and/or modify
    6:    it under the terms of the GNU General Public License as published by
    7:    the Free Software Foundation; either version 3 of the License, or
    8:    (at your option) any later version.
    9: 
   10:    This program is distributed in the hope that it will be useful,
   11:    but WITHOUT ANY WARRANTY; without even the implied warranty of
   12:    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   13:    GNU General Public License for more details.
   14: 
   15:    You should have received a copy of the GNU General Public License
   16:    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
   17: 
   18: /* Written by Jim Meyering <jim@meyering.net>
   19:    and Bruno Haible <bruno@clisp.org>.  */
   20: 
   21: #include <config.h>
   22: 
   23: /* Specification.  */
   24: #include "xreadlink.h"
   25: 
   26: #include <errno.h>
   27: 
   28: #include "areadlink.h"
   29: #include "xalloc.h"
   30: 
   31: /* Call readlink to get the symbolic link value of FILENAME.
   32:    Return a pointer to that NUL-terminated string in malloc'd storage.
   33:    If readlink fails, return NULL and set errno.
   34:    If realloc fails, or if the link value is longer than SIZE_MAX :-),
   35:    give a diagnostic and exit.  */
   36: 
   37: char *
   38: xreadlink (char const *filename)
   39: {
   40:   char *result = areadlink (filename);
   41:   if (result == NULL && errno == ENOMEM)
   42:     xalloc_die ();
   43:   return result;
   44: }