openpkg/patch.strnlen.c@f8813e60f168 (annotated)
openpkg/patch.strnlen.c
Fri, 03 Aug 2012 20:11:53 +0200
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Fri, 03 Aug 2012 20:11:53 +0200
- changeset 470
- f8813e60f168
- permissions
- -rw-r--r--
Neutralize buggy code causing OpenPKG to have 'fatal problems' in
spite of correct installation, configuration, and operation. An
administrator suffering from this failure is even unable to
uninstall the flawed software.
| michael@428 | 1 | /* Find the length of STRING, but scan at most MAXLEN characters. |
| michael@428 | 2 | Copyright (C) 2005, 2006, 2007, 2009 Free Software Foundation, Inc. |
| michael@428 | 3 | Written by Simon Josefsson. |
| michael@428 | 4 | |
| michael@428 | 5 | This program is free software; you can redistribute it and/or modify |
| michael@428 | 6 | it under the terms of the GNU General Public License as published by |
| michael@428 | 7 | the Free Software Foundation; either version 2, or (at your option) |
| michael@428 | 8 | any later version. |
| michael@428 | 9 | |
| michael@428 | 10 | This program is distributed in the hope that it will be useful, |
| michael@428 | 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| michael@428 | 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| michael@428 | 13 | GNU General Public License for more details. |
| michael@428 | 14 | |
| michael@428 | 15 | You should have received a copy of the GNU General Public License |
| michael@428 | 16 | along with this program; if not, write to the Free Software Foundation, |
| michael@428 | 17 | Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ |
| michael@428 | 18 | |
| michael@428 | 19 | #include <config.h> |
| michael@428 | 20 | |
| michael@428 | 21 | #include <string.h> |
| michael@428 | 22 | |
| michael@428 | 23 | /* Find the length of STRING, but scan at most MAXLEN characters. |
| michael@428 | 24 | If no '\0' terminator is found in that many characters, return MAXLEN. */ |
| michael@428 | 25 | |
| michael@428 | 26 | size_t |
| michael@428 | 27 | strnlen (const char *string, size_t maxlen) |
| michael@428 | 28 | { |
| michael@428 | 29 | const char *end = memchr (string, '\0', maxlen); |
| michael@428 | 30 | return end ? (size_t) (end - string) : maxlen; |
| michael@428 | 31 | } |
