mirror of
https://github.com/moparisthebest/pacman
synced 2024-12-22 15:58:50 -05:00
e253968b4d
Similar to the case for makedepends, it is useful to be able to access this information without parsing a PKGBUILD. Signed-off-by: Allan McRae <allan@archlinux.org>
672 lines
18 KiB
C
672 lines
18 KiB
C
/*
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* be_sync.c : backend for sync databases
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*
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* Copyright (c) 2006-2012 Pacman Development Team <pacman-dev@archlinux.org>
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* Copyright (c) 2002-2006 by Judd Vinet <jvinet@zeroflux.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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/* libarchive */
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#include <archive.h>
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#include <archive_entry.h>
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/* libalpm */
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#include "util.h"
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#include "log.h"
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#include "alpm.h"
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#include "alpm_list.h"
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#include "package.h"
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#include "handle.h"
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#include "delta.h"
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#include "deps.h"
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#include "dload.h"
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static char *get_sync_dir(alpm_handle_t *handle)
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{
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size_t len = strlen(handle->dbpath) + 6;
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char *syncpath;
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struct stat buf;
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MALLOC(syncpath, len, RET_ERR(handle, ALPM_ERR_MEMORY, NULL));
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sprintf(syncpath, "%s%s", handle->dbpath, "sync/");
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if(stat(syncpath, &buf) != 0) {
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_alpm_log(handle, ALPM_LOG_DEBUG, "database dir '%s' does not exist, creating it\n",
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syncpath);
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if(_alpm_makepath(syncpath) != 0) {
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free(syncpath);
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RET_ERR(handle, ALPM_ERR_SYSTEM, NULL);
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}
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} else if(!S_ISDIR(buf.st_mode)) {
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_alpm_log(handle, ALPM_LOG_WARNING, _("removing invalid file: %s\n"), syncpath);
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if(unlink(syncpath) != 0 || _alpm_makepath(syncpath) != 0) {
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free(syncpath);
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RET_ERR(handle, ALPM_ERR_SYSTEM, NULL);
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}
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}
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return syncpath;
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}
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static int sync_db_validate(alpm_db_t *db)
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{
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alpm_siglevel_t level;
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const char *dbpath;
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if(db->status & DB_STATUS_VALID || db->status & DB_STATUS_MISSING) {
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return 0;
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}
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if(db->status & DB_STATUS_INVALID) {
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db->handle->pm_errno = ALPM_ERR_DB_INVALID_SIG;
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return -1;
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}
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dbpath = _alpm_db_path(db);
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if(!dbpath) {
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/* pm_errno set in _alpm_db_path() */
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return -1;
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}
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/* we can skip any validation if the database doesn't exist */
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if(_alpm_access(db->handle, NULL, dbpath, R_OK) != 0 && errno == ENOENT) {
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db->status &= ~DB_STATUS_EXISTS;
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db->status |= DB_STATUS_MISSING;
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_alpm_log(db->handle, ALPM_LOG_WARNING,
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"database file for '%s' does not exist\n", db->treename);
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goto valid;
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}
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db->status |= DB_STATUS_EXISTS;
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db->status &= ~DB_STATUS_MISSING;
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/* this takes into account the default verification level if UNKNOWN
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* was assigned to this db */
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level = alpm_db_get_siglevel(db);
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if(level & ALPM_SIG_DATABASE) {
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int retry, ret;
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do {
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retry = 0;
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alpm_siglist_t *siglist;
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ret = _alpm_check_pgp_helper(db->handle, dbpath, NULL,
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level & ALPM_SIG_DATABASE_OPTIONAL, level & ALPM_SIG_DATABASE_MARGINAL_OK,
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level & ALPM_SIG_DATABASE_UNKNOWN_OK, &siglist);
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if(ret) {
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retry = _alpm_process_siglist(db->handle, db->treename, siglist,
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level & ALPM_SIG_DATABASE_OPTIONAL, level & ALPM_SIG_DATABASE_MARGINAL_OK,
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level & ALPM_SIG_DATABASE_UNKNOWN_OK);
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}
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alpm_siglist_cleanup(siglist);
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free(siglist);
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} while(retry);
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if(ret) {
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db->status &= ~DB_STATUS_VALID;
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db->status |= DB_STATUS_INVALID;
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db->handle->pm_errno = ALPM_ERR_DB_INVALID_SIG;
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return 1;
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}
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}
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valid:
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db->status |= DB_STATUS_VALID;
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db->status &= ~DB_STATUS_INVALID;
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return 0;
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}
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/** Update a package database
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*
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* An update of the package database \a db will be attempted. Unless
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* \a force is true, the update will only be performed if the remote
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* database was modified since the last update.
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*
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* This operation requires a database lock, and will return an applicable error
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* if the lock could not be obtained.
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*
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* Example:
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* @code
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* alpm_list_t *syncs = alpm_option_get_syncdbs();
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* for(i = syncs; i; i = alpm_list_next(i)) {
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* alpm_db_t *db = alpm_list_getdata(i);
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* result = alpm_db_update(0, db);
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*
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* if(result < 0) {
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* printf("Unable to update database: %s\n", alpm_strerrorlast());
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* } else if(result == 1) {
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* printf("Database already up to date\n");
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* } else {
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* printf("Database updated\n");
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* }
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* }
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* @endcode
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*
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* @ingroup alpm_databases
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* @note After a successful update, the \link alpm_db_get_pkgcache()
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* package cache \endlink will be invalidated
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* @param force if true, then forces the update, otherwise update only in case
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* the database isn't up to date
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* @param db pointer to the package database to update
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* @return 0 on success, -1 on error (pm_errno is set accordingly), 1 if up to
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* to date
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*/
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int SYMEXPORT alpm_db_update(int force, alpm_db_t *db)
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{
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char *syncpath;
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alpm_list_t *i;
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int ret = -1;
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mode_t oldmask;
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alpm_handle_t *handle;
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alpm_siglevel_t level;
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/* Sanity checks */
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ASSERT(db != NULL, return -1);
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handle = db->handle;
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handle->pm_errno = 0;
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ASSERT(db != handle->db_local, RET_ERR(handle, ALPM_ERR_WRONG_ARGS, -1));
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ASSERT(db->servers != NULL, RET_ERR(handle, ALPM_ERR_SERVER_NONE, -1));
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syncpath = get_sync_dir(handle);
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if(!syncpath) {
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return -1;
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}
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/* make sure we have a sane umask */
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oldmask = umask(0022);
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level = alpm_db_get_siglevel(db);
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/* attempt to grab a lock */
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if(_alpm_handle_lock(handle)) {
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free(syncpath);
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umask(oldmask);
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RET_ERR(handle, ALPM_ERR_HANDLE_LOCK, -1);
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}
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for(i = db->servers; i; i = i->next) {
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const char *server = i->data;
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struct dload_payload payload;
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size_t len;
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int sig_ret = 0;
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memset(&payload, 0, sizeof(struct dload_payload));
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/* set hard upper limit of 25MiB */
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payload.max_size = 25 * 1024 * 1024;
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/* print server + filename into a buffer */
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len = strlen(server) + strlen(db->treename) + 5;
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/* TODO fix leak syncpath and umask unset */
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MALLOC(payload.fileurl, len, RET_ERR(handle, ALPM_ERR_MEMORY, -1));
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snprintf(payload.fileurl, len, "%s/%s.db", server, db->treename);
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payload.handle = handle;
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payload.force = force;
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payload.unlink_on_fail = 1;
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ret = _alpm_download(&payload, syncpath, NULL);
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_alpm_dload_payload_reset(&payload);
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if(ret == 0 && (level & ALPM_SIG_DATABASE)) {
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/* an existing sig file is no good at this point */
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char *sigpath = _alpm_sigpath(handle, _alpm_db_path(db));
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if(!sigpath) {
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ret = -1;
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break;
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}
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unlink(sigpath);
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free(sigpath);
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/* if we downloaded a DB, we want the .sig from the same server */
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/* print server + filename into a buffer (leave space for .sig) */
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len = strlen(server) + strlen(db->treename) + 9;
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/* TODO fix leak syncpath and umask unset */
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MALLOC(payload.fileurl, len, RET_ERR(handle, ALPM_ERR_MEMORY, -1));
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snprintf(payload.fileurl, len, "%s/%s.db.sig", server, db->treename);
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payload.handle = handle;
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payload.force = 1;
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payload.errors_ok = (level & ALPM_SIG_DATABASE_OPTIONAL);
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/* set hard upper limit of 16KiB */
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payload.max_size = 16 * 1024;
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sig_ret = _alpm_download(&payload, syncpath, NULL);
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/* errors_ok suppresses error messages, but not the return code */
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sig_ret = payload.errors_ok ? 0 : sig_ret;
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_alpm_dload_payload_reset(&payload);
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}
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if(ret != -1 && sig_ret != -1) {
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break;
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}
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}
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if(ret == 1) {
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/* files match, do nothing */
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handle->pm_errno = 0;
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goto cleanup;
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} else if(ret == -1) {
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/* pm_errno was set by the download code */
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_alpm_log(handle, ALPM_LOG_DEBUG, "failed to sync db: %s\n",
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alpm_strerror(handle->pm_errno));
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goto cleanup;
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}
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/* Cache needs to be rebuilt */
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_alpm_db_free_pkgcache(db);
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/* clear all status flags regarding validity/existence */
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db->status &= ~DB_STATUS_VALID;
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db->status &= ~DB_STATUS_INVALID;
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db->status &= ~DB_STATUS_EXISTS;
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db->status &= ~DB_STATUS_MISSING;
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if(sync_db_validate(db)) {
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/* pm_errno should be set */
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ret = -1;
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}
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cleanup:
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if(_alpm_handle_unlock(handle)) {
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_alpm_log(handle, ALPM_LOG_WARNING, _("could not remove lock file %s\n"),
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handle->lockfile);
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}
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free(syncpath);
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umask(oldmask);
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return ret;
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}
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/* Forward decl so I don't reorganize the whole file right now */
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static int sync_db_read(alpm_db_t *db, struct archive *archive,
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struct archive_entry *entry, alpm_pkg_t **likely_pkg);
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static alpm_pkgvalidation_t _sync_get_validation(alpm_pkg_t *pkg)
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{
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if(pkg->validation) {
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return pkg->validation;
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}
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if(pkg->md5sum) {
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pkg->validation |= ALPM_PKG_VALIDATION_MD5SUM;
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}
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if(pkg->sha256sum) {
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pkg->validation |= ALPM_PKG_VALIDATION_SHA256SUM;
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}
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if(pkg->base64_sig) {
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pkg->validation |= ALPM_PKG_VALIDATION_SIGNATURE;
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}
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if(!pkg->validation) {
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pkg->validation |= ALPM_PKG_VALIDATION_NONE;
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}
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return pkg->validation;
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}
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static alpm_pkg_t *load_pkg_for_entry(alpm_db_t *db, const char *entryname,
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const char **entry_filename, alpm_pkg_t *likely_pkg)
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{
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char *pkgname = NULL, *pkgver = NULL;
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unsigned long pkgname_hash;
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alpm_pkg_t *pkg;
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/* get package and db file names */
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if(entry_filename) {
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char *fname = strrchr(entryname, '/');
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if(fname) {
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*entry_filename = fname + 1;
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} else {
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*entry_filename = NULL;
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}
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}
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if(_alpm_splitname(entryname, &pkgname, &pkgver, &pkgname_hash) != 0) {
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_alpm_log(db->handle, ALPM_LOG_ERROR,
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_("invalid name for database entry '%s'\n"), entryname);
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return NULL;
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}
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if(likely_pkg && pkgname_hash == likely_pkg->name_hash
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&& strcmp(likely_pkg->name, pkgname) == 0) {
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pkg = likely_pkg;
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} else {
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pkg = _alpm_pkghash_find(db->pkgcache, pkgname);
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}
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if(pkg == NULL) {
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pkg = _alpm_pkg_new();
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if(pkg == NULL) {
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RET_ERR(db->handle, ALPM_ERR_MEMORY, NULL);
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}
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pkg->name = pkgname;
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pkg->version = pkgver;
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pkg->name_hash = pkgname_hash;
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pkg->origin = ALPM_PKG_FROM_SYNCDB;
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pkg->origin_data.db = db;
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pkg->ops = &default_pkg_ops;
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pkg->ops->get_validation = _sync_get_validation;
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pkg->handle = db->handle;
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/* add to the collection */
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_alpm_log(db->handle, ALPM_LOG_FUNCTION, "adding '%s' to package cache for db '%s'\n",
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pkg->name, db->treename);
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db->pkgcache = _alpm_pkghash_add(db->pkgcache, pkg);
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} else {
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free(pkgname);
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free(pkgver);
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}
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return pkg;
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}
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/* This function doesn't work as well as one might think, as size of database
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* entries varies considerably. Adding signatures nearly doubles the size of a
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* single entry; deltas also can make for large variations in size. These
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* current values are heavily influenced by Arch Linux; databases with no
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* deltas and a single signature per package. */
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static size_t estimate_package_count(struct stat *st, struct archive *archive)
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{
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int per_package;
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switch(archive_compression(archive)) {
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case ARCHIVE_COMPRESSION_NONE:
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per_package = 3015;
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break;
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case ARCHIVE_COMPRESSION_GZIP:
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case ARCHIVE_COMPRESSION_COMPRESS:
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per_package = 464;
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break;
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case ARCHIVE_COMPRESSION_BZIP2:
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per_package = 394;
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break;
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case ARCHIVE_COMPRESSION_LZMA:
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case ARCHIVE_COMPRESSION_XZ:
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per_package = 400;
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break;
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#ifdef ARCHIVE_COMPRESSION_UU
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case ARCHIVE_COMPRESSION_UU:
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per_package = 3015 * 4 / 3;
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break;
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#endif
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default:
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/* assume it is at least somewhat compressed */
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per_package = 500;
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}
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return (size_t)((st->st_size / per_package) + 1);
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}
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static int sync_db_populate(alpm_db_t *db)
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{
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const char *dbpath;
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size_t est_count;
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int count, fd;
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struct stat buf;
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struct archive *archive;
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struct archive_entry *entry;
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alpm_pkg_t *pkg = NULL;
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if(db->status & DB_STATUS_INVALID) {
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RET_ERR(db->handle, ALPM_ERR_DB_INVALID, -1);
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}
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if(db->status & DB_STATUS_MISSING) {
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RET_ERR(db->handle, ALPM_ERR_DB_NOT_FOUND, -1);
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}
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dbpath = _alpm_db_path(db);
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if(!dbpath) {
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/* pm_errno set in _alpm_db_path() */
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return -1;
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}
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fd = _alpm_open_archive(db->handle, dbpath, &buf,
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&archive, ALPM_ERR_DB_OPEN);
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if(fd < 0) {
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return -1;
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}
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est_count = estimate_package_count(&buf, archive);
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db->pkgcache = _alpm_pkghash_create(est_count);
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if(db->pkgcache == NULL) {
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db->handle->pm_errno = ALPM_ERR_MEMORY;
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count = -1;
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goto cleanup;
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}
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while(archive_read_next_header(archive, &entry) == ARCHIVE_OK) {
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mode_t mode = archive_entry_mode(entry);
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if(S_ISDIR(mode)) {
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continue;
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} else {
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/* we have desc, depends or deltas - parse it */
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if(sync_db_read(db, archive, entry, &pkg) != 0) {
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_alpm_log(db->handle, ALPM_LOG_ERROR,
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_("could not parse package description file '%s' from db '%s'\n"),
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archive_entry_pathname(entry), db->treename);
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continue;
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}
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}
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}
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count = alpm_list_count(db->pkgcache->list);
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if(count > 0) {
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db->pkgcache->list = alpm_list_msort(db->pkgcache->list,
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(size_t)count, _alpm_pkg_cmp);
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}
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_alpm_log(db->handle, ALPM_LOG_DEBUG,
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"added %d packages to package cache for db '%s'\n",
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count, db->treename);
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cleanup:
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archive_read_finish(archive);
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if(fd >= 0) {
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CLOSE(fd);
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}
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return count;
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}
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#define READ_NEXT() do { \
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if(_alpm_archive_fgets(archive, &buf) != ARCHIVE_OK) goto error; \
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line = buf.line; \
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_alpm_strip_newline(line, buf.real_line_size); \
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} while(0)
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#define READ_AND_STORE(f) do { \
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READ_NEXT(); \
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STRDUP(f, line, goto error); \
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} while(0)
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#define READ_AND_STORE_ALL(f) do { \
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|
char *linedup; \
|
|
if(_alpm_archive_fgets(archive, &buf) != ARCHIVE_OK) goto error; \
|
|
if(_alpm_strip_newline(buf.line, buf.real_line_size) == 0) break; \
|
|
STRDUP(linedup, buf.line, goto error); \
|
|
f = alpm_list_add(f, linedup); \
|
|
} while(1) /* note the while(1) and not (0) */
|
|
|
|
#define READ_AND_SPLITDEP(f) do { \
|
|
if(_alpm_archive_fgets(archive, &buf) != ARCHIVE_OK) goto error; \
|
|
if(_alpm_strip_newline(buf.line, buf.real_line_size) == 0) break; \
|
|
f = alpm_list_add(f, _alpm_splitdep(line)); \
|
|
} while(1) /* note the while(1) and not (0) */
|
|
|
|
static int sync_db_read(alpm_db_t *db, struct archive *archive,
|
|
struct archive_entry *entry, alpm_pkg_t **likely_pkg)
|
|
{
|
|
const char *entryname, *filename;
|
|
alpm_pkg_t *pkg;
|
|
struct archive_read_buffer buf;
|
|
|
|
entryname = archive_entry_pathname(entry);
|
|
if(entryname == NULL) {
|
|
_alpm_log(db->handle, ALPM_LOG_DEBUG,
|
|
"invalid archive entry provided to _alpm_sync_db_read, skipping\n");
|
|
return -1;
|
|
}
|
|
|
|
_alpm_log(db->handle, ALPM_LOG_FUNCTION, "loading package data from archive entry %s\n",
|
|
entryname);
|
|
|
|
memset(&buf, 0, sizeof(buf));
|
|
/* 512K for a line length seems reasonable */
|
|
buf.max_line_size = 512 * 1024;
|
|
|
|
pkg = load_pkg_for_entry(db, entryname, &filename, *likely_pkg);
|
|
|
|
if(pkg == NULL) {
|
|
_alpm_log(db->handle, ALPM_LOG_DEBUG,
|
|
"entry %s could not be loaded into %s sync database",
|
|
entryname, db->treename);
|
|
return -1;
|
|
}
|
|
|
|
if(strcmp(filename, "desc") == 0 || strcmp(filename, "depends") == 0
|
|
|| strcmp(filename, "deltas") == 0) {
|
|
int ret;
|
|
while((ret = _alpm_archive_fgets(archive, &buf)) == ARCHIVE_OK) {
|
|
char *line = buf.line;
|
|
if(_alpm_strip_newline(line, buf.real_line_size) == 0) {
|
|
/* length of stripped line was zero */
|
|
continue;
|
|
}
|
|
|
|
if(strcmp(line, "%NAME%") == 0) {
|
|
READ_NEXT();
|
|
if(strcmp(line, pkg->name) != 0) {
|
|
_alpm_log(db->handle, ALPM_LOG_ERROR, _("%s database is inconsistent: name "
|
|
"mismatch on package %s\n"), db->treename, pkg->name);
|
|
}
|
|
} else if(strcmp(line, "%VERSION%") == 0) {
|
|
READ_NEXT();
|
|
if(strcmp(line, pkg->version) != 0) {
|
|
_alpm_log(db->handle, ALPM_LOG_ERROR, _("%s database is inconsistent: version "
|
|
"mismatch on package %s\n"), db->treename, pkg->name);
|
|
}
|
|
} else if(strcmp(line, "%FILENAME%") == 0) {
|
|
READ_AND_STORE(pkg->filename);
|
|
} else if(strcmp(line, "%DESC%") == 0) {
|
|
READ_AND_STORE(pkg->desc);
|
|
} else if(strcmp(line, "%GROUPS%") == 0) {
|
|
READ_AND_STORE_ALL(pkg->groups);
|
|
} else if(strcmp(line, "%URL%") == 0) {
|
|
READ_AND_STORE(pkg->url);
|
|
} else if(strcmp(line, "%LICENSE%") == 0) {
|
|
READ_AND_STORE_ALL(pkg->licenses);
|
|
} else if(strcmp(line, "%ARCH%") == 0) {
|
|
READ_AND_STORE(pkg->arch);
|
|
} else if(strcmp(line, "%BUILDDATE%") == 0) {
|
|
READ_NEXT();
|
|
pkg->builddate = _alpm_parsedate(line);
|
|
} else if(strcmp(line, "%PACKAGER%") == 0) {
|
|
READ_AND_STORE(pkg->packager);
|
|
} else if(strcmp(line, "%CSIZE%") == 0) {
|
|
READ_NEXT();
|
|
pkg->size = _alpm_strtoofft(line);
|
|
} else if(strcmp(line, "%ISIZE%") == 0) {
|
|
READ_NEXT();
|
|
pkg->isize = _alpm_strtoofft(line);
|
|
} else if(strcmp(line, "%MD5SUM%") == 0) {
|
|
READ_AND_STORE(pkg->md5sum);
|
|
} else if(strcmp(line, "%SHA256SUM%") == 0) {
|
|
READ_AND_STORE(pkg->sha256sum);
|
|
} else if(strcmp(line, "%PGPSIG%") == 0) {
|
|
READ_AND_STORE(pkg->base64_sig);
|
|
} else if(strcmp(line, "%REPLACES%") == 0) {
|
|
READ_AND_SPLITDEP(pkg->replaces);
|
|
} else if(strcmp(line, "%DEPENDS%") == 0) {
|
|
READ_AND_SPLITDEP(pkg->depends);
|
|
} else if(strcmp(line, "%OPTDEPENDS%") == 0) {
|
|
READ_AND_SPLITDEP(pkg->optdepends);
|
|
} else if(strcmp(line, "%MAKEDEPENDS%") == 0) {
|
|
/* currently unused */
|
|
while(1) {
|
|
READ_NEXT();
|
|
if(strlen(line) == 0) break;
|
|
}
|
|
} else if(strcmp(line, "%CHECKDEPENDS%") == 0) {
|
|
/* currently unused */
|
|
while(1) {
|
|
READ_NEXT();
|
|
if(strlen(line) == 0) break;
|
|
}
|
|
} else if(strcmp(line, "%CONFLICTS%") == 0) {
|
|
READ_AND_SPLITDEP(pkg->conflicts);
|
|
} else if(strcmp(line, "%PROVIDES%") == 0) {
|
|
READ_AND_SPLITDEP(pkg->provides);
|
|
} else if(strcmp(line, "%DELTAS%") == 0) {
|
|
/* Different than the rest because of the _alpm_delta_parse call. */
|
|
while(1) {
|
|
READ_NEXT();
|
|
if(strlen(line) == 0) break;
|
|
pkg->deltas = alpm_list_add(pkg->deltas,
|
|
_alpm_delta_parse(db->handle, line));
|
|
}
|
|
}
|
|
}
|
|
if(ret != ARCHIVE_EOF) {
|
|
goto error;
|
|
}
|
|
*likely_pkg = pkg;
|
|
} else if(strcmp(filename, "files") == 0) {
|
|
/* currently do nothing with this file */
|
|
} else {
|
|
/* unknown database file */
|
|
_alpm_log(db->handle, ALPM_LOG_DEBUG, "unknown database file: %s\n", filename);
|
|
}
|
|
|
|
return 0;
|
|
|
|
error:
|
|
_alpm_log(db->handle, ALPM_LOG_DEBUG, "error parsing database file: %s\n", filename);
|
|
return -1;
|
|
}
|
|
|
|
struct db_operations sync_db_ops = {
|
|
.validate = sync_db_validate,
|
|
.populate = sync_db_populate,
|
|
.unregister = _alpm_db_unregister,
|
|
};
|
|
|
|
alpm_db_t *_alpm_db_register_sync(alpm_handle_t *handle, const char *treename,
|
|
alpm_siglevel_t level)
|
|
{
|
|
alpm_db_t *db;
|
|
|
|
_alpm_log(handle, ALPM_LOG_DEBUG, "registering sync database '%s'\n", treename);
|
|
|
|
#ifndef HAVE_LIBGPGME
|
|
if(level != 0 && level != ALPM_SIG_USE_DEFAULT) {
|
|
RET_ERR(handle, ALPM_ERR_WRONG_ARGS, NULL);
|
|
}
|
|
#endif
|
|
|
|
db = _alpm_db_new(treename, 0);
|
|
if(db == NULL) {
|
|
RET_ERR(handle, ALPM_ERR_DB_CREATE, NULL);
|
|
}
|
|
db->ops = &sync_db_ops;
|
|
db->handle = handle;
|
|
db->siglevel = level;
|
|
|
|
sync_db_validate(db);
|
|
|
|
handle->dbs_sync = alpm_list_add(handle->dbs_sync, db);
|
|
return db;
|
|
}
|
|
|
|
/* vim: set ts=2 sw=2 noet: */
|