/* * db.c * * Copyright (c) 2002-2007 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 David Kimpe <dnaku@frugalware.org> * Copyright (c) 2005, 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 <unistd.h> #include <stdio.h> #include <stdlib.h> #include <errno.h> #include <string.h> #include <stdint.h> /* uintmax_t */ #include <sys/stat.h> #include <dirent.h> #include <regex.h> #include <time.h> /* libalpm */ #include "db.h" #include "alpm_list.h" #include "log.h" #include "util.h" #include "error.h" #include "server.h" #include "handle.h" #include "cache.h" #include "alpm.h" /** \addtogroup alpm_databases Database Functions * @brief Functions to query and manipulate the database of libalpm * @{ */ /** Register a sync database of packages. * @param treename the name of the sync repository * @return a pmdb_t* on success (the value), NULL on error */ pmdb_t SYMEXPORT *alpm_db_register_sync(const char *treename) { ALPM_LOG_FUNC; /* Sanity checks */ ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, NULL)); ASSERT(treename != NULL && strlen(treename) != 0, RET_ERR(PM_ERR_WRONG_ARGS, NULL)); /* Do not register a database if a transaction is on-going */ ASSERT(handle->trans == NULL, RET_ERR(PM_ERR_TRANS_NOT_NULL, NULL)); return(_alpm_db_register_sync(treename)); } /** Register the local package database. * @return a pmdb_t* representing the local database, or NULL on error */ pmdb_t SYMEXPORT *alpm_db_register_local(void) { ALPM_LOG_FUNC; /* Sanity checks */ ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, NULL)); /* Do not register a database if a transaction is on-going */ ASSERT(handle->trans == NULL, RET_ERR(PM_ERR_TRANS_NOT_NULL, NULL)); return(_alpm_db_register_local()); } /* Helper function for alpm_db_unregister{_all} */ static void _alpm_db_unregister(pmdb_t *db) { if(db == NULL) { return; } _alpm_log(PM_LOG_DEBUG, "closing database '%s'\n", db->treename); _alpm_db_close(db); _alpm_log(PM_LOG_DEBUG, "unregistering database '%s'\n", db->treename); _alpm_db_free(db); } /** Unregister all package databases * @return 0 on success, -1 on error (pm_errno is set accordingly) */ int SYMEXPORT alpm_db_unregister_all(void) { alpm_list_t *i; ALPM_LOG_FUNC; /* Sanity checks */ ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1)); /* Do not unregister a database if a transaction is on-going */ ASSERT(handle->trans == NULL, RET_ERR(PM_ERR_TRANS_NOT_NULL, -1)); /* close local database */ _alpm_db_unregister(handle->db_local); handle->db_local = NULL; /* and also sync ones */ for(i = handle->dbs_sync; i; i = i->next) { pmdb_t *db = i->data; _alpm_db_unregister(db); i->data = NULL; } FREELIST(handle->dbs_sync); return(0); } /** Unregister a package database * @param db pointer to the package database to unregister * @return 0 on success, -1 on error (pm_errno is set accordingly) */ int SYMEXPORT alpm_db_unregister(pmdb_t *db) { int found = 0; ALPM_LOG_FUNC; /* Sanity checks */ ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1)); ASSERT(db != NULL, RET_ERR(PM_ERR_WRONG_ARGS, -1)); /* Do not unregister a database if a transaction is on-going */ ASSERT(handle->trans == NULL, RET_ERR(PM_ERR_TRANS_NOT_NULL, -1)); if(db == handle->db_local) { handle->db_local = NULL; found = 1; } else { /* Warning : this function shouldn't be used to unregister all sync * databases by walking through the list returned by * alpm_option_get_syncdbs, because the db is removed from that list here. */ void *data; handle->dbs_sync = alpm_list_remove(handle->dbs_sync, db, _alpm_db_cmp, &data); if(data) { found = 1; } } if(!found) { RET_ERR(PM_ERR_DB_NOT_FOUND, -1); } _alpm_db_unregister(db); return(0); } /** Set the serverlist of a database. * @param db database pointer * @param url url of the server * @return 0 on success, -1 on error (pm_errno is set accordingly) */ int SYMEXPORT alpm_db_setserver(pmdb_t *db, const char *url) { alpm_list_t *i; int found = 0; ALPM_LOG_FUNC; /* Sanity checks */ ASSERT(db != NULL, RET_ERR(PM_ERR_DB_NULL, -1)); for(i = handle->dbs_sync; i && !found; i = i->next) { pmdb_t *sdb = i->data; if(strcmp(db->treename, sdb->treename) == 0) { found = 1; } } if(!found) { RET_ERR(PM_ERR_DB_NOT_FOUND, -1); } if(url && strlen(url)) { pmserver_t *server; if((server = _alpm_server_new(url)) == NULL) { /* pm_errno is set by _alpm_server_new */ return(-1); } db->servers = alpm_list_add(db->servers, server); _alpm_log(PM_LOG_DEBUG, "adding new server to database '%s': protocol '%s', server '%s', path '%s'\n", db->treename, server->s_url->scheme, server->s_url->host, server->s_url->doc); } else { FREELIST(db->servers); _alpm_log(PM_LOG_DEBUG, "serverlist flushed for '%s'\n", db->treename); } return(0); } /** Update a package database * @param force if true, then forces the update, otherwise update only in case * the database isn't up to date * @param db pointer to the package database to update * @return 0 on success, > 0 on error (pm_errno is set accordingly), < 0 if up * to date */ int SYMEXPORT alpm_db_update(int force, pmdb_t *db) { alpm_list_t *lp; char path[PATH_MAX]; alpm_list_t *files = NULL; time_t newmtime = 0, lastupdate = 0; const char *dbpath; int ret; ALPM_LOG_FUNC; /* Sanity checks */ ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1)); ASSERT(db != NULL && db != handle->db_local, RET_ERR(PM_ERR_WRONG_ARGS, -1)); /* Verify we are in a transaction. This is done _mainly_ because we need a DB * lock - if we update without a db lock, we may kludge some other pacman * process that _has_ a lock. */ ASSERT(handle->trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1)); ASSERT(handle->trans->state == STATE_INITIALIZED, RET_ERR(PM_ERR_TRANS_NOT_INITIALIZED, -1)); ASSERT(handle->trans->type == PM_TRANS_TYPE_SYNC, RET_ERR(PM_ERR_TRANS_TYPE, -1)); if(!alpm_list_find_ptr(handle->dbs_sync, db)) { RET_ERR(PM_ERR_DB_NOT_FOUND, -1); } if(!force) { /* get the lastupdate time */ lastupdate = _alpm_db_getlastupdate(db); if(lastupdate == 0) { _alpm_log(PM_LOG_DEBUG, "failed to get lastupdate time for %s\n", db->treename); } } /* build a one-element list */ snprintf(path, PATH_MAX, "%s" DBEXT, db->treename); files = alpm_list_add(files, strdup(path)); dbpath = alpm_option_get_dbpath(); ret = _alpm_downloadfiles_forreal(db->servers, dbpath, files, lastupdate, &newmtime, NULL, 0); FREELIST(files); if(ret == 1) { /* mtimes match, do nothing */ pm_errno = 0; return(1); } else if(ret == -1) { /* we use downloadLastErrString and downloadLastErrCode here, error returns from * libdownload */ _alpm_log(PM_LOG_DEBUG, "failed to sync db: %s [%d]\n", downloadLastErrString, downloadLastErrCode); RET_ERR(PM_ERR_DB_SYNC, -1); } else { if(newmtime != 0) { _alpm_log(PM_LOG_DEBUG, "sync: new mtime for %s: %ju\n", db->treename, (uintmax_t)newmtime); _alpm_db_setlastupdate(db, newmtime); } snprintf(path, PATH_MAX, "%s%s" DBEXT, dbpath, db->treename); /* remove the old dir */ _alpm_log(PM_LOG_DEBUG, "flushing database %s\n", db->path); for(lp = _alpm_db_get_pkgcache(db); lp; lp = lp->next) { pmpkg_t *pkg = lp->data; if(pkg && _alpm_db_remove(db, pkg) == -1) { _alpm_log(PM_LOG_ERROR, _("could not remove database entry %s%s\n"), db->treename, alpm_pkg_get_name(pkg)); RET_ERR(PM_ERR_DB_REMOVE, -1); } } /* Cache needs to be rebuild */ _alpm_db_free_pkgcache(db); /* uncompress the sync database */ if(_alpm_db_install(db, path) == -1) { return -1; } } return(0); } /** Get the name of a package database * @param db pointer to the package database * @return the name of the package database, NULL on error */ const char SYMEXPORT *alpm_db_get_name(const pmdb_t *db) { ALPM_LOG_FUNC; /* Sanity checks */ ASSERT(handle != NULL, return(NULL)); ASSERT(db != NULL, return(NULL)); return db->treename; } /** Get a download URL for the package database * @param db pointer to the package database * @return a fully-specified download URL, NULL on error */ const char SYMEXPORT *alpm_db_get_url(const pmdb_t *db) { char path[PATH_MAX]; pmserver_t *s; ALPM_LOG_FUNC; /* Sanity checks */ ASSERT(handle != NULL, return(NULL)); ASSERT(db != NULL, return(NULL)); s = (pmserver_t*)db->servers->data; snprintf(path, PATH_MAX, "%s://%s%s", s->s_url->scheme, s->s_url->host, s->s_url->doc); return strdup(path); } /** Get a package entry from a package database * @param db pointer to the package database to get the package from * @param name of the package * @return the package entry on success, NULL on error */ pmpkg_t SYMEXPORT *alpm_db_get_pkg(pmdb_t *db, const char *name) { ALPM_LOG_FUNC; /* Sanity checks */ ASSERT(handle != NULL, return(NULL)); ASSERT(db != NULL, return(NULL)); ASSERT(name != NULL && strlen(name) != 0, return(NULL)); return(_alpm_db_get_pkgfromcache(db, name)); } /** Get the package cache of a package database * @param db pointer to the package database to get the package from * @return the list of packages on success, NULL on error */ alpm_list_t SYMEXPORT *alpm_db_getpkgcache(pmdb_t *db) { ALPM_LOG_FUNC; /* Sanity checks */ ASSERT(handle != NULL, return(NULL)); ASSERT(db != NULL, return(NULL)); return(_alpm_db_get_pkgcache(db)); } /** Get the list of packages that a package provides * @param db pointer to the package database to get the package from * @param name name of the package * @return the list of packages on success, NULL on error */ alpm_list_t SYMEXPORT *alpm_db_whatprovides(pmdb_t *db, const char *name) { ALPM_LOG_FUNC; /* Sanity checks */ ASSERT(handle != NULL, return(NULL)); ASSERT(db != NULL, return(NULL)); ASSERT(name != NULL && strlen(name) != 0, return(NULL)); return(_alpm_db_whatprovides(db, name)); } /** Get a group entry from a package database * @param db pointer to the package database to get the group from * @param name of the group * @return the groups entry on success, NULL on error */ pmgrp_t SYMEXPORT *alpm_db_readgrp(pmdb_t *db, const char *name) { ALPM_LOG_FUNC; /* Sanity checks */ ASSERT(handle != NULL, return(NULL)); ASSERT(db != NULL, return(NULL)); ASSERT(name != NULL && strlen(name) != 0, return(NULL)); return(_alpm_db_get_grpfromcache(db, name)); } /** Get the group cache of a package database * @param db pointer to the package database to get the group from * @return the list of groups on success, NULL on error */ alpm_list_t SYMEXPORT *alpm_db_getgrpcache(pmdb_t *db) { ALPM_LOG_FUNC; /* Sanity checks */ ASSERT(handle != NULL, return(NULL)); ASSERT(db != NULL, return(NULL)); return(_alpm_db_get_grpcache(db)); } /** Searches a database * @param db pointer to the package database to search in * @param needles the list of strings to search for * @return the list of packages on success, NULL on error */ alpm_list_t SYMEXPORT *alpm_db_search(pmdb_t *db, const alpm_list_t* needles) { ALPM_LOG_FUNC; /* Sanity checks */ ASSERT(handle != NULL, return(NULL)); ASSERT(db != NULL, return(NULL)); return(_alpm_db_search(db, needles)); } /** @} */ pmdb_t *_alpm_db_new(const char *dbpath, const char *treename) { pmdb_t *db; const size_t pathsize = strlen(dbpath) + strlen(treename) + 2; ALPM_LOG_FUNC; CALLOC(db, 1, sizeof(pmdb_t), RET_ERR(PM_ERR_MEMORY, NULL)); CALLOC(db->path, 1, pathsize, RET_ERR(PM_ERR_MEMORY, NULL)); sprintf(db->path, "%s%s/", dbpath, treename); strncpy(db->treename, treename, PATH_MAX); return(db); } void _alpm_db_free(pmdb_t *db) { alpm_list_t *tmp; ALPM_LOG_FUNC; /* cleanup pkgcache */ _alpm_db_free_pkgcache(db); /* cleanup server list */ for(tmp = db->servers; tmp; tmp = alpm_list_next(tmp)) { _alpm_server_free(tmp->data); } alpm_list_free(db->servers); FREE(db->path); FREE(db); return; } int _alpm_db_cmp(const void *db1, const void *db2) { ALPM_LOG_FUNC; return(strcmp(((pmdb_t *)db1)->treename, ((pmdb_t *)db2)->treename)); } alpm_list_t *_alpm_db_search(pmdb_t *db, const alpm_list_t *needles) { const alpm_list_t *i, *j, *k; alpm_list_t *ret = NULL; ALPM_LOG_FUNC; for(i = needles; i; i = i->next) { char *targ; regex_t reg; if(i->data == NULL) { continue; } targ = i->data; _alpm_log(PM_LOG_DEBUG, "searching for target '%s'\n", targ); if(regcomp(®, targ, REG_EXTENDED | REG_NOSUB | REG_ICASE | REG_NEWLINE) != 0) { RET_ERR(PM_ERR_INVALID_REGEX, NULL); } for(j = _alpm_db_get_pkgcache(db); j; j = j->next) { pmpkg_t *pkg = j->data; const char *matched = NULL; /* check name */ if (regexec(®, alpm_pkg_get_name(pkg), 0, 0, 0) == 0) { matched = alpm_pkg_get_name(pkg); } /* check plain text name */ else if (strstr(alpm_pkg_get_name(pkg), targ)) { matched = alpm_pkg_get_name(pkg); } /* check desc */ else if (regexec(®, alpm_pkg_get_desc(pkg), 0, 0, 0) == 0) { matched = alpm_pkg_get_desc(pkg); } /* check provides */ /* TODO: should we be doing this, and should we print something * differently when we do match it since it isn't currently printed? */ else { for(k = alpm_pkg_get_provides(pkg); k; k = k->next) { if (regexec(®, k->data, 0, 0, 0) == 0) { matched = k->data; break; } } } if(matched != NULL) { _alpm_log(PM_LOG_DEBUG, " search target '%s' matched '%s'\n", targ, matched); ret = alpm_list_add(ret, pkg); } } regfree(®); } return(ret); } pmdb_t *_alpm_db_register_local(void) { struct stat buf; pmdb_t *db; const char *dbpath; char path[PATH_MAX]; ALPM_LOG_FUNC; if(handle->db_local != NULL) { _alpm_log(PM_LOG_WARNING, _("attempt to re-register the 'local' DB\n")); RET_ERR(PM_ERR_DB_NOT_NULL, NULL); } _alpm_log(PM_LOG_DEBUG, "registering local database\n"); /* make sure the database directory exists */ dbpath = alpm_option_get_dbpath(); if(!dbpath) { _alpm_log(PM_LOG_ERROR, _("database path is undefined\n")); RET_ERR(PM_ERR_DB_OPEN, NULL); } snprintf(path, PATH_MAX, "%slocal", dbpath); /* TODO this is rediculous, we try to do this even if we can't */ if(stat(path, &buf) != 0 || !S_ISDIR(buf.st_mode)) { _alpm_log(PM_LOG_DEBUG, "database dir '%s' does not exist, creating it\n", path); if(_alpm_makepath(path) != 0) { RET_ERR(PM_ERR_SYSTEM, NULL); } } db = _alpm_db_new(dbpath, "local"); if(db == NULL) { RET_ERR(PM_ERR_DB_CREATE, NULL); } _alpm_log(PM_LOG_DEBUG, "opening database '%s'\n", db->treename); if(_alpm_db_open(db) == -1) { _alpm_db_free(db); RET_ERR(PM_ERR_DB_OPEN, NULL); } handle->db_local = db; return(db); } pmdb_t *_alpm_db_register_sync(const char *treename) { struct stat buf; pmdb_t *db; const char *dbpath; char path[PATH_MAX]; alpm_list_t *i; ALPM_LOG_FUNC; for(i = handle->dbs_sync; i; i = i->next) { pmdb_t *sdb = i->data; if(strcmp(treename, sdb->treename) == 0) { _alpm_log(PM_LOG_DEBUG, "attempt to re-register the '%s' database, using existing\n", sdb->treename); return sdb; } } _alpm_log(PM_LOG_DEBUG, "registering sync database '%s'\n", treename); /* make sure the database directory exists */ dbpath = alpm_option_get_dbpath(); if(!dbpath) { _alpm_log(PM_LOG_ERROR, _("database path is undefined\n")); RET_ERR(PM_ERR_DB_OPEN, NULL); } /* all sync DBs now reside in the sync/ subdir of the dbpath */ snprintf(path, PATH_MAX, "%ssync/%s", dbpath, treename); /* TODO this is rediculous, we try to do this even if we can't */ if(stat(path, &buf) != 0 || !S_ISDIR(buf.st_mode)) { _alpm_log(PM_LOG_DEBUG, "database dir '%s' does not exist, creating it\n", path); if(_alpm_makepath(path) != 0) { RET_ERR(PM_ERR_SYSTEM, NULL); } } /* Ensure the db gets the real path. */ path[0] = '\0'; snprintf(path, PATH_MAX, "%ssync/", dbpath); db = _alpm_db_new(path, treename); if(db == NULL) { RET_ERR(PM_ERR_DB_CREATE, NULL); } _alpm_log(PM_LOG_DEBUG, "opening database '%s'\n", db->treename); if(_alpm_db_open(db) == -1) { _alpm_db_free(db); RET_ERR(PM_ERR_DB_OPEN, NULL); } handle->dbs_sync = alpm_list_add(handle->dbs_sync, db); return(db); } /* helper function for alpm_list_find and _alpm_db_whatprovides * * @return "provision.name" == needle (as string) */ int _alpm_prov_cmp(const void *provision, const void *needle) { char *tmpptr; char *provname = strdup(provision); int retval = 0; tmpptr = strchr(provname, '='); if(tmpptr != NULL) { /* provision-version */ *tmpptr='\0'; } retval = strcmp(provname, needle); free(provname); return(retval); } /* return a alpm_list_t of packages in "db" that provide "package" */ alpm_list_t *_alpm_db_whatprovides(pmdb_t *db, const char *package) { alpm_list_t *pkgs = NULL; alpm_list_t *lp; ALPM_LOG_FUNC; if(db == NULL || package == NULL || strlen(package) == 0) { return(NULL); } for(lp = _alpm_db_get_pkgcache(db); lp; lp = lp->next) { pmpkg_t *info = lp->data; if(alpm_list_find(alpm_pkg_get_provides(info), (const void *)package, _alpm_prov_cmp)) { pkgs = alpm_list_add(pkgs, info); } } return(pkgs); } /* vim: set ts=2 sw=2 noet: */