/* * 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; ALPM_LOG_FUNC; 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: */