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/*
* backup.c
*
* Copyright (c) 2006-2011 Pacman Development Team <pacman-dev@archlinux.org>
* Copyright (c) 2005 by Judd Vinet <jvinet@zeroflux.org>
* Copyright (c) 2005 by Aurelien Foret <orelien@chez.com>
* Copyright (c) 2005 by Christian Hamar <krics@linuxforum.hu>
* Copyright (c) 2006 by Miklos Vajna <vmiklos@frugalware.org>
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
/* libalpm */
#include "backup.h"
#include "alpm_list.h"
#include "log.h"
#include "util.h"
/* split a backup string "file\thash" into two strings : file and hash */
static int backup_split(const char *string, char **file, char **hash)
{
char *str = strdup(string);
char *ptr;
/* tab delimiter */
ptr = strchr(str, '\t');
if(ptr == NULL) {
if(file) {
*file = str;
} else {
/* don't need our dup as the fname wasn't requested, so free it */
FREE(str);
}
return 0;
}
*ptr = '\0';
ptr++;
/* now str points to the filename and ptr points to the hash */
if(file) {
*file = strdup(str);
}
if(hash) {
*hash = strdup(ptr);
}
FREE(str);
return 1;
}
char *_alpm_backup_file(const char *string)
{
char *file = NULL;
backup_split(string, &file, NULL);
return file;
}
char *_alpm_backup_hash(const char *string)
{
char *hash = NULL;
backup_split(string, NULL, &hash);
return hash;
}
/* Look for a filename in a pmpkg_t.backup list. If we find it,
* then we return the md5 hash (parsed from the same line)
*/
char *_alpm_needbackup(const char *file, const alpm_list_t *backup)
{
const alpm_list_t *lp;
if(file == NULL || backup == NULL) {
return NULL;
}
/* run through the backup list and parse out the hash for our file */
for(lp = backup; lp; lp = lp->next) {
char *filename = NULL;
char *hash = NULL;
/* no hash found */
if(!backup_split((char *)lp->data, &filename, &hash)) {
FREE(filename);
continue;
}
if(strcmp(file, filename) == 0) {
FREE(filename);
return hash;
}
FREE(filename);
FREE(hash);
}
return NULL;
}
/* vim: set ts=2 sw=2 noet: */
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