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 37char * 38xreadlink (char const *filename) 39{ 40 char *result = areadlink (filename); 41 if (result == NULL && errno == ENOMEM) 42 xalloc_die (); 43 return result; 44} 45