1/* Stub for readlink(). 2 Copyright (C) 2003-2007 Free Software Foundation, Inc. 3 4 This program is free software: you can redistribute it and/or modify 5 it under the terms of the GNU General Public License as published by 6 the Free Software Foundation; either version 3 of the License, or 7 (at your option) any later version. 8 9 This program is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 GNU General Public License for more details. 13 14 You should have received a copy of the GNU General Public License 15 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 16 17#include <config.h> 18 19/* Specification. */ 20#include <unistd.h> 21 22#include <errno.h> 23#include <sys/types.h> 24#include <sys/stat.h> 25#include <stddef.h> 26 27#if !HAVE_READLINK 28 29/* readlink() substitute for systems that don't have a readlink() function, 30 such as DJGPP 2.03 and mingw32. */ 31 32/* The official POSIX return type of readlink() is ssize_t, but since here 33 we have no declaration in a public header file, we use 'int' as return 34 type. */ 35 36int 37readlink (const char *path, char *buf, size_t bufsize) 38{ 39 struct stat statbuf; 40 41 /* In general we should use lstat() here, not stat(). But on platforms 42 without symbolic links lstat() - if it exists - would be equivalent to 43 stat(), therefore we can use stat(). This saves us a configure check. */ 44 if (stat (path, &statbuf) >= 0) 45 errno = EINVAL; 46 return -1; 47} 48 49#endif 50