util-safechdir.c (1345B)
1 // $Id$ --*- c -*-- 2 3 // Copyright (C) 2003 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de> 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; version 2 of the License. 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, write to the Free Software 16 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 17 18 19 #ifdef HAVE_CONFIG_H 20 # include <config.h> 21 #endif 22 23 #include <errno.h> 24 #include <sys/types.h> 25 #include <sys/stat.h> 26 #include <unistd.h> 27 #include <string.h> 28 29 int 30 safeChdir(char const *path, struct stat const *exp_stat) 31 { 32 if (strchr(path, '/')!=0) { 33 errno = EINVAL; 34 return -1; 35 } 36 37 { 38 struct stat now_stat; 39 if (chdir(path)==-1 || 40 stat(".", &now_stat)==-1) return -1; 41 if (exp_stat->st_dev != now_stat.st_dev || 42 exp_stat->st_ino != now_stat.st_ino) { 43 // TODO: warning/logging 44 errno = EINVAL; 45 return -1; 46 } 47 } 48 49 return 0; 50 }