/* * db.c * * Copyright (c) 2006-2010 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 "config.h" #include <stdio.h> #include <stdlib.h> #include <errno.h> #include <string.h> #include <sys/stat.h> #include <regex.h> #include <time.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. * @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} */ void _alpm_db_unregister(pmdb_t *db) { if(db == NULL) { return; } _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; pmdb_t *db; 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 */ db = handle->db_local; if(db) { db->ops->unregister(db); handle->db_local = NULL; } /* and also sync ones */ 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 * @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); } db->ops->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; char *newurl; int len = 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) { len = strlen(url); } if(len) { newurl = strdup(url); /* strip the trailing slash if one exists */ if(newurl[len - 1] == '/') { newurl[len - 1] = '\0'; } db->servers = alpm_list_add(db->servers, newurl); _alpm_log(PM_LOG_DEBUG, "adding new server URL to database '%s': %s\n", db->treename, newurl); } else { FREELIST(db->servers); _alpm_log(PM_LOG_DEBUG, "serverlist flushed for '%s'\n", db->treename); } 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 *url; ALPM_LOG_FUNC; /* Sanity checks */ ASSERT(handle != NULL, return(NULL)); ASSERT(db != NULL, return(NULL)); ASSERT(db->servers != NULL, return(NULL)); url = (char*)db->servers->data; return(url); } /** 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_get_pkgcache(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 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_get_grpcache(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)); } /** Set install reason for a package in db * @param db pointer to the package database * @param name the name of the package * @param reason the new install reason * @return 0 on success, -1 on error (pm_errno is set accordingly) */ int SYMEXPORT alpm_db_set_pkgreason(pmdb_t *db, const char *name, pmpkgreason_t reason) { ALPM_LOG_FUNC; /* Sanity checks */ ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1)); ASSERT(db != NULL && name != NULL, RET_ERR(PM_ERR_WRONG_ARGS, -1)); pmpkg_t *pkg = _alpm_db_get_pkgfromcache(db, name); if(pkg == NULL) { RET_ERR(PM_ERR_PKG_NOT_FOUND, -1); } _alpm_log(PM_LOG_DEBUG, "setting install reason %u for %s/%s\n", reason, db->treename, name); if(alpm_pkg_get_reason(pkg) == reason) { /* we are done */ return(0); } /* set reason (in pkgcache) */ pkg->reason = reason; /* write DESC */ if(_alpm_local_db_write(db, pkg, INFRQ_DESC)) { return(-1); } return(0); } /** @} */ pmdb_t *_alpm_db_new(const char *treename, int is_local) { pmdb_t *db; ALPM_LOG_FUNC; CALLOC(db, 1, sizeof(pmdb_t), RET_ERR(PM_ERR_MEMORY, NULL)); STRDUP(db->treename, treename, RET_ERR(PM_ERR_MEMORY, NULL)); db->is_local = is_local; return(db); } void _alpm_db_free(pmdb_t *db) { ALPM_LOG_FUNC; /* 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(pmdb_t *db) { if(!db) { return(NULL); } if(!db->_path) { const char *dbpath; size_t pathsize; dbpath = alpm_option_get_dbpath(); if(!dbpath) { _alpm_log(PM_LOG_ERROR, _("database path is undefined\n")); RET_ERR(PM_ERR_DB_OPEN, NULL); } if(db->is_local) { pathsize = strlen(dbpath) + strlen(db->treename) + 2; CALLOC(db->_path, 1, pathsize, RET_ERR(PM_ERR_MEMORY, NULL)); sprintf(db->_path, "%s%s/", dbpath, db->treename); } else { pathsize = strlen(dbpath) + 5 + strlen(db->treename) + 4; CALLOC(db->_path, 1, pathsize, RET_ERR(PM_ERR_MEMORY, NULL)); /* all sync DBs now reside in the sync/ subdir of the dbpath */ sprintf(db->_path, "%ssync/%s.db", dbpath, db->treename); } _alpm_log(PM_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) { pmdb_t *db1 = (pmdb_t *)d1; pmdb_t *db2 = (pmdb_t *)d2; return(strcmp(db1->treename, 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; /* copy the pkgcache- we will free the list var after each needle */ alpm_list_t *list = alpm_list_copy(_alpm_db_get_pkgcache(db)); ALPM_LOG_FUNC; for(i = needles; i; i = i->next) { char *targ; regex_t reg; if(i->data == NULL) { continue; } ret = NULL; 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 = list; j; j = j->next) { pmpkg_t *pkg = j->data; const char *matched = NULL; const char *name = alpm_pkg_get_name(pkg); 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) { if (regexec(®, k->data, 0, 0, 0) == 0) { matched = k->data; 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(PM_LOG_DEBUG, " search target '%s' matched '%s'\n", targ, matched); 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. */ int _alpm_db_load_pkgcache(pmdb_t *db) { ALPM_LOG_FUNC; if(db == NULL) { return(-1); } _alpm_db_free_pkgcache(db); _alpm_log(PM_LOG_DEBUG, "loading package cache for repository '%s'\n", db->treename); if(db->ops->populate(db) == -1) { _alpm_log(PM_LOG_DEBUG, "failed to load package cache for repository '%s'\n", db->treename); return(-1); } db->pkgcache_loaded = 1; return(0); } void _alpm_db_free_pkgcache(pmdb_t *db) { ALPM_LOG_FUNC; if(db == NULL || !db->pkgcache_loaded) { return; } _alpm_log(PM_LOG_DEBUG, "freeing package cache for repository '%s'\n", db->treename); alpm_list_free_inner(db->pkgcache, (alpm_list_fn_free)_alpm_pkg_free); alpm_list_free(db->pkgcache); db->pkgcache_loaded = 0; _alpm_db_free_grpcache(db); } alpm_list_t *_alpm_db_get_pkgcache(pmdb_t *db) { ALPM_LOG_FUNC; if(db == NULL) { return(NULL); } if(!db->pkgcache_loaded) { _alpm_db_load_pkgcache(db); } /* hmmm, still NULL ?*/ if(!db->pkgcache) { _alpm_log(PM_LOG_DEBUG, "warning: pkgcache is NULL for db '%s'\n", db->treename); } return(db->pkgcache); } /* "duplicate" pkg then add it to pkgcache */ int _alpm_db_add_pkgincache(pmdb_t *db, pmpkg_t *pkg) { pmpkg_t *newpkg; ALPM_LOG_FUNC; if(db == NULL || !db->pkgcache_loaded || pkg == NULL) { return(-1); } newpkg = _alpm_pkg_dup(pkg); if(newpkg == NULL) { return(-1); } _alpm_log(PM_LOG_DEBUG, "adding entry '%s' in '%s' cache\n", alpm_pkg_get_name(newpkg), db->treename); db->pkgcache = alpm_list_add_sorted(db->pkgcache, newpkg, _alpm_pkg_cmp); _alpm_db_free_grpcache(db); return(0); } int _alpm_db_remove_pkgfromcache(pmdb_t *db, pmpkg_t *pkg) { void *vdata; pmpkg_t *data; ALPM_LOG_FUNC; if(db == NULL || !db->pkgcache_loaded || pkg == NULL) { return(-1); } _alpm_log(PM_LOG_DEBUG, "removing entry '%s' from '%s' cache\n", alpm_pkg_get_name(pkg), db->treename); db->pkgcache = alpm_list_remove(db->pkgcache, pkg, _alpm_pkg_cmp, &vdata); data = vdata; if(data == NULL) { /* package not found */ _alpm_log(PM_LOG_DEBUG, "cannot remove entry '%s' from '%s' cache: not found\n", alpm_pkg_get_name(pkg), db->treename); return(-1); } _alpm_pkg_free(data); _alpm_db_free_grpcache(db); return(0); } pmpkg_t *_alpm_db_get_pkgfromcache(pmdb_t *db, const char *target) { ALPM_LOG_FUNC; if(db == NULL) { return(NULL); } alpm_list_t *pkgcache = _alpm_db_get_pkgcache(db); if(!pkgcache) { _alpm_log(PM_LOG_DEBUG, "warning: failed to get '%s' from NULL pkgcache\n", target); return(NULL); } return(_alpm_pkg_find(pkgcache, target)); } /* Returns a new group cache from db. */ int _alpm_db_load_grpcache(pmdb_t *db) { alpm_list_t *lp; ALPM_LOG_FUNC; if(db == NULL) { return(-1); } _alpm_log(PM_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; pmpkg_t *pkg = lp->data; for(i = alpm_pkg_get_groups(pkg); i; i = i->next) { const char *grpname = i->data; alpm_list_t *j; pmgrp_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_grp_new(grpname); grp->packages = alpm_list_add(grp->packages, pkg); db->grpcache = alpm_list_add(db->grpcache, grp); } } db->grpcache_loaded = 1; return(0); } void _alpm_db_free_grpcache(pmdb_t *db) { alpm_list_t *lg; ALPM_LOG_FUNC; if(db == NULL || !db->grpcache_loaded) { return; } _alpm_log(PM_LOG_DEBUG, "freeing group cache for repository '%s'\n", db->treename); for(lg = db->grpcache; lg; lg = lg->next) { _alpm_grp_free(lg->data); lg->data = NULL; } FREELIST(db->grpcache); db->grpcache_loaded = 0; } alpm_list_t *_alpm_db_get_grpcache(pmdb_t *db) { ALPM_LOG_FUNC; if(db == NULL) { return(NULL); } if(!db->grpcache_loaded) { _alpm_db_load_grpcache(db); } return(db->grpcache); } pmgrp_t *_alpm_db_get_grpfromcache(pmdb_t *db, const char *target) { alpm_list_t *i; ALPM_LOG_FUNC; if(db == NULL || target == NULL || strlen(target) == 0) { return(NULL); } for(i = _alpm_db_get_grpcache(db); i; i = i->next) { pmgrp_t *info = i->data; if(strcmp(info->name, target) == 0) { return(info); } } return(NULL); } /* vim: set ts=2 sw=2 noet: */