/* * db.c * * Copyright (c) 2006-2016 Pacman Development Team <pacman-dev@archlinux.org> * Copyright (c) 2002-2006 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 <stdio.h> #include <stdlib.h> #include <string.h> #include <regex.h> /* libalpm */ #include "db.h" #include "alpm_list.h" #include "log.h" #include "util.h" #include "handle.h" #include "alpm.h" #include "package.h" #include "group.h" /** \addtogroup alpm_databases Database Functions * @brief Functions to query and manipulate the database of libalpm * @{ */ /** Register a sync database of packages. */ alpm_db_t SYMEXPORT *alpm_register_syncdb(alpm_handle_t *handle, const char *treename, alpm_siglevel_t level) { alpm_list_t *i; /* Sanity checks */ CHECK_HANDLE(handle, return NULL); ASSERT(treename != NULL && strlen(treename) != 0, RET_ERR(handle, ALPM_ERR_WRONG_ARGS, NULL)); ASSERT(!strchr(treename, '/'), RET_ERR(handle, ALPM_ERR_WRONG_ARGS, NULL)); /* Do not register a database if a transaction is on-going */ ASSERT(handle->trans == NULL, RET_ERR(handle, ALPM_ERR_TRANS_NOT_NULL, NULL)); /* ensure database name is unique */ if(strcmp(treename, "local") == 0) { RET_ERR(handle, ALPM_ERR_DB_NOT_NULL, NULL); } for(i = handle->dbs_sync; i; i = i->next) { alpm_db_t *d = i->data; if(strcmp(treename, d->treename) == 0) { RET_ERR(handle, ALPM_ERR_DB_NOT_NULL, NULL); } } return _alpm_db_register_sync(handle, treename, level); } /* Helper function for alpm_db_unregister{_all} */ void _alpm_db_unregister(alpm_db_t *db) { if(db == NULL) { return; } _alpm_log(db->handle, ALPM_LOG_DEBUG, "unregistering database '%s'\n", db->treename); _alpm_db_free(db); } /** Unregister all package databases. */ int SYMEXPORT alpm_unregister_all_syncdbs(alpm_handle_t *handle) { alpm_list_t *i; alpm_db_t *db; /* Sanity checks */ CHECK_HANDLE(handle, return -1); /* Do not unregister a database if a transaction is on-going */ ASSERT(handle->trans == NULL, RET_ERR(handle, ALPM_ERR_TRANS_NOT_NULL, -1)); /* unregister all sync dbs */ for(i = handle->dbs_sync; i; i = i->next) { db = i->data; db->ops->unregister(db); i->data = NULL; } FREELIST(handle->dbs_sync); return 0; } /** Unregister a package database. */ int SYMEXPORT alpm_db_unregister(alpm_db_t *db) { int found = 0; alpm_handle_t *handle; /* Sanity checks */ ASSERT(db != NULL, return -1); /* Do not unregister a database if a transaction is on-going */ handle = db->handle; handle->pm_errno = 0; ASSERT(handle->trans == NULL, RET_ERR(handle, ALPM_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_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(handle, ALPM_ERR_DB_NOT_FOUND, -1); } db->ops->unregister(db); return 0; } /** Get the serverlist of a database. */ alpm_list_t SYMEXPORT *alpm_db_get_servers(const alpm_db_t *db) { ASSERT(db != NULL, return NULL); return db->servers; } /** Set the serverlist of a database. */ int SYMEXPORT alpm_db_set_servers(alpm_db_t *db, alpm_list_t *servers) { ASSERT(db != NULL, return -1); FREELIST(db->servers); db->servers = servers; return 0; } static char *sanitize_url(const char *url) { char *newurl; size_t len = strlen(url); STRDUP(newurl, url, return NULL); /* strip the trailing slash if one exists */ if(newurl[len - 1] == '/') { newurl[len - 1] = '\0'; } return newurl; } /** Add a download server to 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_add_server(alpm_db_t *db, const char *url) { char *newurl; /* Sanity checks */ ASSERT(db != NULL, return -1); db->handle->pm_errno = 0; ASSERT(url != NULL && strlen(url) != 0, RET_ERR(db->handle, ALPM_ERR_WRONG_ARGS, -1)); newurl = sanitize_url(url); if(!newurl) { return -1; } db->servers = alpm_list_add(db->servers, newurl); _alpm_log(db->handle, ALPM_LOG_DEBUG, "adding new server URL to database '%s': %s\n", db->treename, newurl); return 0; } /** Remove a download server from a database. * @param db database pointer * @param url url of the server * @return 0 on success, 1 on server not present, * -1 on error (pm_errno is set accordingly) */ int SYMEXPORT alpm_db_remove_server(alpm_db_t *db, const char *url) { char *newurl, *vdata = NULL; int ret = 1; /* Sanity checks */ ASSERT(db != NULL, return -1); db->handle->pm_errno = 0; ASSERT(url != NULL && strlen(url) != 0, RET_ERR(db->handle, ALPM_ERR_WRONG_ARGS, -1)); newurl = sanitize_url(url); if(!newurl) { return -1; } db->servers = alpm_list_remove_str(db->servers, newurl, &vdata); if(vdata) { _alpm_log(db->handle, ALPM_LOG_DEBUG, "removed server URL from database '%s': %s\n", db->treename, newurl); free(vdata); ret = 0; } free(newurl); return ret; } /** Get the name of a package database. */ const char SYMEXPORT *alpm_db_get_name(const alpm_db_t *db) { ASSERT(db != NULL, return NULL); return db->treename; } /** Get the signature verification level for a database. */ alpm_siglevel_t SYMEXPORT alpm_db_get_siglevel(alpm_db_t *db) { ASSERT(db != NULL, return -1); if(db->siglevel & ALPM_SIG_USE_DEFAULT) { return db->handle->siglevel; } else { return db->siglevel; } } /** Check the validity of a database. */ int SYMEXPORT alpm_db_get_valid(alpm_db_t *db) { ASSERT(db != NULL, return -1); db->handle->pm_errno = 0; return db->ops->validate(db); } /** Get a package entry from a package database. */ alpm_pkg_t SYMEXPORT *alpm_db_get_pkg(alpm_db_t *db, const char *name) { alpm_pkg_t *pkg; ASSERT(db != NULL, return NULL); db->handle->pm_errno = 0; ASSERT(name != NULL && strlen(name) != 0, RET_ERR(db->handle, ALPM_ERR_WRONG_ARGS, NULL)); pkg = _alpm_db_get_pkgfromcache(db, name); if(!pkg) { RET_ERR(db->handle, ALPM_ERR_PKG_NOT_FOUND, NULL); } return pkg; } /** Get the package cache of a package database. */ alpm_list_t SYMEXPORT *alpm_db_get_pkgcache(alpm_db_t *db) { ASSERT(db != NULL, return NULL); db->handle->pm_errno = 0; return _alpm_db_get_pkgcache(db); } /** Get a group entry from a package database. */ alpm_group_t SYMEXPORT *alpm_db_get_group(alpm_db_t *db, const char *name) { ASSERT(db != NULL, return NULL); db->handle->pm_errno = 0; ASSERT(name != NULL && strlen(name) != 0, RET_ERR(db->handle, ALPM_ERR_WRONG_ARGS, NULL)); return _alpm_db_get_groupfromcache(db, name); } /** Get the group cache of a package database. */ alpm_list_t SYMEXPORT *alpm_db_get_groupcache(alpm_db_t *db) { ASSERT(db != NULL, return NULL); db->handle->pm_errno = 0; return _alpm_db_get_groupcache(db); } /** Searches a database. */ alpm_list_t SYMEXPORT *alpm_db_search(alpm_db_t *db, const alpm_list_t *needles) { ASSERT(db != NULL, return NULL); db->handle->pm_errno = 0; return _alpm_db_search(db, needles); } /** Sets the usage bitmask for a repo */ int SYMEXPORT alpm_db_set_usage(alpm_db_t *db, alpm_db_usage_t usage) { ASSERT(db != NULL, return -1); db->usage = usage; return 0; } /** Gets the usage bitmask for a repo */ int SYMEXPORT alpm_db_get_usage(alpm_db_t *db, alpm_db_usage_t *usage) { ASSERT(db != NULL, return -1); ASSERT(usage != NULL, return -1); *usage = db->usage; return 0; } /** @} */ alpm_db_t *_alpm_db_new(const char *treename, int is_local) { alpm_db_t *db; CALLOC(db, 1, sizeof(alpm_db_t), return NULL); STRDUP(db->treename, treename, FREE(db); return NULL); if(is_local) { db->status |= DB_STATUS_LOCAL; } else { db->status &= ~DB_STATUS_LOCAL; } db->usage = ALPM_DB_USAGE_ALL; return db; } void _alpm_db_free(alpm_db_t *db) { ASSERT(db != NULL, return); /* cleanup pkgcache */ _alpm_db_free_pkgcache(db); /* cleanup server list */ FREELIST(db->servers); FREE(db->_path); FREE(db->treename); FREE(db); return; } const char *_alpm_db_path(alpm_db_t *db) { if(!db) { return NULL; } if(!db->_path) { const char *dbpath; size_t pathsize; dbpath = db->handle->dbpath; if(!dbpath) { _alpm_log(db->handle, ALPM_LOG_ERROR, _("database path is undefined\n")); RET_ERR(db->handle, ALPM_ERR_DB_OPEN, NULL); } if(db->status & DB_STATUS_LOCAL) { pathsize = strlen(dbpath) + strlen(db->treename) + 2; CALLOC(db->_path, 1, pathsize, RET_ERR(db->handle, ALPM_ERR_MEMORY, NULL)); sprintf(db->_path, "%s%s/", dbpath, db->treename); } else { const char *dbext = db->handle->dbext; pathsize = strlen(dbpath) + 5 + strlen(db->treename) + strlen(dbext) + 1; CALLOC(db->_path, 1, pathsize, RET_ERR(db->handle, ALPM_ERR_MEMORY, NULL)); /* all sync DBs now reside in the sync/ subdir of the dbpath */ sprintf(db->_path, "%ssync/%s%s", dbpath, db->treename, dbext); } _alpm_log(db->handle, ALPM_LOG_DEBUG, "database path for tree %s set to %s\n", db->treename, db->_path); } return db->_path; } int _alpm_db_cmp(const void *d1, const void *d2) { const alpm_db_t *db1 = d1; const alpm_db_t *db2 = d2; return strcmp(db1->treename, db2->treename); } alpm_list_t *_alpm_db_search(alpm_db_t *db, const alpm_list_t *needles) { const alpm_list_t *i, *j, *k; alpm_list_t *ret = NULL; if(!(db->usage & ALPM_DB_USAGE_SEARCH)) { return NULL; } /* copy the pkgcache- we will free the list var after each needle */ alpm_list_t *list = alpm_list_copy(_alpm_db_get_pkgcache(db)); for(i = needles; i; i = i->next) { char *targ; regex_t reg; if(i->data == NULL) { continue; } ret = NULL; targ = i->data; _alpm_log(db->handle, ALPM_LOG_DEBUG, "searching for target '%s'\n", targ); if(regcomp(®, targ, REG_EXTENDED | REG_NOSUB | REG_ICASE | REG_NEWLINE) != 0) { RET_ERR(db->handle, ALPM_ERR_INVALID_REGEX, NULL); } for(j = list; j; j = j->next) { alpm_pkg_t *pkg = j->data; const char *matched = NULL; const char *name = pkg->name; const char *desc = alpm_pkg_get_desc(pkg); /* check name as regex AND as plain text */ if(name && (regexec(®, name, 0, 0, 0) == 0 || strstr(name, targ))) { matched = name; } /* check desc */ else if(desc && regexec(®, desc, 0, 0, 0) == 0) { matched = desc; } /* TODO: should we be doing this, and should we print something * differently when we do match it since it isn't currently printed? */ if(!matched) { /* check provides */ for(k = alpm_pkg_get_provides(pkg); k; k = k->next) { alpm_depend_t *provide = k->data; if(regexec(®, provide->name, 0, 0, 0) == 0) { matched = provide->name; break; } } } if(!matched) { /* check groups */ for(k = alpm_pkg_get_groups(pkg); k; k = k->next) { if(regexec(®, k->data, 0, 0, 0) == 0) { matched = k->data; break; } } } if(matched != NULL) { _alpm_log(db->handle, ALPM_LOG_DEBUG, "search target '%s' matched '%s' on package '%s'\n", targ, matched, name); ret = alpm_list_add(ret, pkg); } } /* Free the existing search list, and use the returned list for the * next needle. This allows for AND-based package searching. */ alpm_list_free(list); list = ret; regfree(®); } return ret; } /* Returns a new package cache from db. * It frees the cache if it already exists. */ static int load_pkgcache(alpm_db_t *db) { _alpm_db_free_pkgcache(db); _alpm_log(db->handle, ALPM_LOG_DEBUG, "loading package cache for repository '%s'\n", db->treename); if(db->ops->populate(db) == -1) { _alpm_log(db->handle, ALPM_LOG_DEBUG, "failed to load package cache for repository '%s'\n", db->treename); return -1; } db->status |= DB_STATUS_PKGCACHE; return 0; } static void free_groupcache(alpm_db_t *db) { alpm_list_t *lg; if(db == NULL || !(db->status & DB_STATUS_GRPCACHE)) { return; } _alpm_log(db->handle, ALPM_LOG_DEBUG, "freeing group cache for repository '%s'\n", db->treename); for(lg = db->grpcache; lg; lg = lg->next) { _alpm_group_free(lg->data); lg->data = NULL; } FREELIST(db->grpcache); db->status &= ~DB_STATUS_GRPCACHE; } void _alpm_db_free_pkgcache(alpm_db_t *db) { if(db == NULL || !(db->status & DB_STATUS_PKGCACHE)) { return; } _alpm_log(db->handle, ALPM_LOG_DEBUG, "freeing package cache for repository '%s'\n", db->treename); if(db->pkgcache) { alpm_list_free_inner(db->pkgcache->list, (alpm_list_fn_free)_alpm_pkg_free); _alpm_pkghash_free(db->pkgcache); } db->status &= ~DB_STATUS_PKGCACHE; free_groupcache(db); } alpm_pkghash_t *_alpm_db_get_pkgcache_hash(alpm_db_t *db) { if(db == NULL) { return NULL; } if(!(db->status & DB_STATUS_VALID)) { RET_ERR(db->handle, ALPM_ERR_DB_INVALID, NULL); } if(!(db->status & DB_STATUS_PKGCACHE)) { if(load_pkgcache(db)) { /* handle->error set in local/sync-db-populate */ return NULL; } } return db->pkgcache; } alpm_list_t *_alpm_db_get_pkgcache(alpm_db_t *db) { alpm_pkghash_t *hash = _alpm_db_get_pkgcache_hash(db); if(hash == NULL) { return NULL; } return hash->list; } /* "duplicate" pkg then add it to pkgcache */ int _alpm_db_add_pkgincache(alpm_db_t *db, alpm_pkg_t *pkg) { alpm_pkg_t *newpkg = NULL; if(db == NULL || pkg == NULL || !(db->status & DB_STATUS_PKGCACHE)) { return -1; } if(_alpm_pkg_dup(pkg, &newpkg)) { /* we return memory on "non-fatal" error in _alpm_pkg_dup */ _alpm_pkg_free(newpkg); return -1; } _alpm_log(db->handle, ALPM_LOG_DEBUG, "adding entry '%s' in '%s' cache\n", newpkg->name, db->treename); if(newpkg->origin == ALPM_PKG_FROM_FILE) { free(newpkg->origin_data.file); } newpkg->origin = (db->status & DB_STATUS_LOCAL) ? ALPM_PKG_FROM_LOCALDB : ALPM_PKG_FROM_SYNCDB; newpkg->origin_data.db = db; db->pkgcache = _alpm_pkghash_add_sorted(db->pkgcache, newpkg); free_groupcache(db); return 0; } int _alpm_db_remove_pkgfromcache(alpm_db_t *db, alpm_pkg_t *pkg) { alpm_pkg_t *data = NULL; if(db == NULL || pkg == NULL || !(db->status & DB_STATUS_PKGCACHE)) { return -1; } _alpm_log(db->handle, ALPM_LOG_DEBUG, "removing entry '%s' from '%s' cache\n", pkg->name, db->treename); db->pkgcache = _alpm_pkghash_remove(db->pkgcache, pkg, &data); if(data == NULL) { /* package not found */ _alpm_log(db->handle, ALPM_LOG_DEBUG, "cannot remove entry '%s' from '%s' cache: not found\n", pkg->name, db->treename); return -1; } _alpm_pkg_free(data); free_groupcache(db); return 0; } alpm_pkg_t *_alpm_db_get_pkgfromcache(alpm_db_t *db, const char *target) { if(db == NULL) { return NULL; } alpm_pkghash_t *pkgcache = _alpm_db_get_pkgcache_hash(db); if(!pkgcache) { return NULL; } return _alpm_pkghash_find(pkgcache, target); } /* Returns a new group cache from db. */ static int load_grpcache(alpm_db_t *db) { alpm_list_t *lp; if(db == NULL) { return -1; } _alpm_log(db->handle, ALPM_LOG_DEBUG, "loading group cache for repository '%s'\n", db->treename); for(lp = _alpm_db_get_pkgcache(db); lp; lp = lp->next) { const alpm_list_t *i; alpm_pkg_t *pkg = lp->data; for(i = alpm_pkg_get_groups(pkg); i; i = i->next) { const char *grpname = i->data; alpm_list_t *j; alpm_group_t *grp = NULL; int found = 0; /* first look through the group cache for a group with this name */ for(j = db->grpcache; j; j = j->next) { grp = j->data; if(strcmp(grp->name, grpname) == 0 && !alpm_list_find_ptr(grp->packages, pkg)) { grp->packages = alpm_list_add(grp->packages, pkg); found = 1; break; } } if(found) { continue; } /* we didn't find the group, so create a new one with this name */ grp = _alpm_group_new(grpname); if(!grp) { free_groupcache(db); return -1; } grp->packages = alpm_list_add(grp->packages, pkg); db->grpcache = alpm_list_add(db->grpcache, grp); } } db->status |= DB_STATUS_GRPCACHE; return 0; } alpm_list_t *_alpm_db_get_groupcache(alpm_db_t *db) { if(db == NULL) { return NULL; } if(!(db->status & DB_STATUS_VALID)) { RET_ERR(db->handle, ALPM_ERR_DB_INVALID, NULL); } if(!(db->status & DB_STATUS_GRPCACHE)) { load_grpcache(db); } return db->grpcache; } alpm_group_t *_alpm_db_get_groupfromcache(alpm_db_t *db, const char *target) { alpm_list_t *i; if(db == NULL || target == NULL || strlen(target) == 0) { return NULL; } for(i = _alpm_db_get_groupcache(db); i; i = i->next) { alpm_group_t *info = i->data; if(strcmp(info->name, target) == 0) { return info; } } return NULL; } /* vim: set noet: */