lib/libalpm/backup.c


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/*
 *  backup.c
 *
 *  Copyright (c) 2006-2017 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 <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 the relevant components */
int _alpm_split_backup(const char *string, alpm_backup_t **backup)
{
        char *str, *ptr;

        STRDUP(str, string, return -1);

        /* tab delimiter */
        ptr = str ? strchr(str, '\t') : NULL;
        if(ptr == NULL) {
                (*backup)->name = str;
                (*backup)->hash = NULL;
                return 0;
        }
        *ptr = '\0';
        ptr++;
        /* now str points to the filename and ptr points to the hash */
        STRDUP((*backup)->name, str, FREE(str); return -1);
        STRDUP((*backup)->hash, ptr, FREE((*backup)->name); FREE(str); return -1);
        FREE(str);
        return 0;
}

/* Look for a filename in a alpm_pkg_t.backup list. If we find it,
 * then we return the full backup entry.
 */
alpm_backup_t *_alpm_needbackup(const char *file, alpm_pkg_t *pkg)
{
        const alpm_list_t *lp;

        if(file == NULL || pkg == NULL) {
                return NULL;
        }

        for(lp = alpm_pkg_get_backup(pkg); lp; lp = lp->next) {
                alpm_backup_t *backup = lp->data;

                if(strcmp(file, backup->name) == 0) {
                        return backup;
                }
        }

        return NULL;
}

void _alpm_backup_free(alpm_backup_t *backup)
{
        ASSERT(backup != NULL, return);
        FREE(backup->name);
        FREE(backup->hash);
        FREE(backup);
}

alpm_backup_t *_alpm_backup_dup(const alpm_backup_t *backup)
{
        alpm_backup_t *newbackup;
        CALLOC(newbackup, 1, sizeof(alpm_backup_t), return NULL);

        STRDUP(newbackup->name, backup->name, goto error);
        STRDUP(newbackup->hash, backup->hash, goto error);

        return newbackup;

error:
        free(newbackup->name);
        free(newbackup);
        return NULL;
}

/* vim: set noet: */