110 lines
2.5 KiB
C
110 lines
2.5 KiB
C
/*
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* backup.c
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*
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* Copyright (c) 2005 by Judd Vinet <jvinet@zeroflux.org>
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* Copyright (c) 2005 by Aurelien Foret <orelien@chez.com>
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* Copyright (c) 2005 by Christian Hamar <krics@linuxforum.hu>
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* Copyright (c) 2006 by Miklos Vajna <vmiklos@frugalware.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <string.h>
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/* libalpm */
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#include "backup.h"
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#include "alpm_list.h"
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#include "log.h"
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#include "util.h"
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/* split a backup string "file\thash" into two strings : file and hash */
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int _alpm_backup_split(const char *string, char **file, char **hash)
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{
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char *str = strdup(string);
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char *ptr;
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/* tab delimiter */
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ptr = strchr(str, '\t');
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if(ptr == NULL) {
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if(file) {
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*file = str;
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}
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return(0);
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}
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*ptr = '\0';
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ptr++;
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/* now str points to the filename and ptr points to the hash */
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if(file) {
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*file = strdup(str);
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}
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if(hash) {
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*hash = strdup(ptr);
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}
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FREE(str);
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return(1);
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}
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char *_alpm_backup_file(const char *string)
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{
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char *file = NULL;
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_alpm_backup_split(string, &file, NULL);
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return(file);
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}
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char *_alpm_backup_hash(const char *string)
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{
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char *hash = NULL;
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_alpm_backup_split(string, NULL, &hash);
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return(hash);
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}
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/* Look for a filename in a pmpkg_t.backup list. If we find it,
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* then we return the md5 hash (parsed from the same line)
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*/
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char *_alpm_needbackup(const char *file, const alpm_list_t *backup)
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{
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const alpm_list_t *lp;
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ALPM_LOG_FUNC;
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if(file == NULL || backup == NULL) {
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return(NULL);
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}
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/* run through the backup list and parse out the hash for our file */
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for(lp = backup; lp; lp = lp->next) {
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char *filename = NULL;
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char *hash = NULL;
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/* no hash found */
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if(!_alpm_backup_split((char *)lp->data, &filename, &hash)) {
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FREE(filename);
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continue;
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}
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if(strcmp(file, filename) == 0) {
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FREE(filename);
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return(hash);
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}
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FREE(filename);
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FREE(hash);
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}
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return(NULL);
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}
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/* vim: set ts=2 sw=2 noet: */
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