00001 // Copyright (C) 2006-2007 Benedikt Böhm <hollow@gentoo.org> 00002 // 00003 // This program is free software; you can redistribute it and/or 00004 // modify it under the terms of the GNU General Public License 00005 // as published by the Free Software Foundation; either version 2 00006 // of the License, or (at your option) any later version. 00007 // 00008 // This program is distributed in the hope that it will be useful, 00009 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00010 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00011 // GNU General Public License for more details. 00012 // 00013 // You should have received a copy of the GNU General Public License 00014 // along with this program; if not, write to the Free Software 00015 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA 00016 00017 #include <unistd.h> 00018 00019 #include "mem.h" 00020 #include "misc.h" 00021 00022 #define CHUNKSIZE 128 00023 00024 char *readsymlink(const char *path) 00025 { 00026 int chunks = 1, len = 0; 00027 char *buf = mem_alloc(chunks * CHUNKSIZE + 1); 00028 00029 while (1) { 00030 len = readlink(path, buf, chunks * CHUNKSIZE); 00031 00032 if (len == -1) { 00033 mem_free(buf); 00034 return NULL; 00035 } 00036 00037 if (len >= chunks * CHUNKSIZE) { 00038 chunks++; 00039 buf = mem_realloc(buf, chunks * CHUNKSIZE + 1); 00040 } 00041 00042 else 00043 break; 00044 } 00045 00046 buf[len] = '\0'; 00047 00048 return buf; 00049 }