X-Git-Url: http://git.linux-vserver.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=lib_internal%2Futil-safechdir.c;fp=lib_internal%2Futil-safechdir.c;h=8526ddfcc86986f760b37a016d6b3c3420de3021;hb=9c78378bebc1a9f3d400f422df8ede9efea57dea;hp=0000000000000000000000000000000000000000;hpb=faa778968d1a7dfeaebc9fe4b847e691dc62fd15;p=util-vserver.git diff --git a/lib_internal/util-safechdir.c b/lib_internal/util-safechdir.c new file mode 100644 index 0000000..8526ddf --- /dev/null +++ b/lib_internal/util-safechdir.c @@ -0,0 +1,50 @@ +// $Id$ --*- c -*-- + +// Copyright (C) 2003 Enrico Scholz +// +// This program is free software; you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation; version 2 of the License. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + + +#ifdef HAVE_CONFIG_H +# include +#endif + +#include +#include +#include +#include +#include + +int +safeChdir(char const *path, struct stat const *exp_stat) +{ + if (strchr(path, '/')!=0) { + errno = EINVAL; + return -1; + } + + { + struct stat now_stat; + if (chdir(path)==-1 || + stat(".", &now_stat)==-1) return -1; + if (exp_stat->st_dev != now_stat.st_dev || + exp_stat->st_ino != now_stat.st_ino) { + // TODO: warning/logging + errno = EINVAL; + return -1; + } + } + + return 0; +}