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-rw-r--r--lib/libalpm/be_sync.c485
1 files changed, 485 insertions, 0 deletions
diff --git a/lib/libalpm/be_sync.c b/lib/libalpm/be_sync.c
new file mode 100644
index 00000000..21914944
--- /dev/null
+++ b/lib/libalpm/be_sync.c
@@ -0,0 +1,485 @@
+/*
+ * be_sync.c
+ *
+ * Copyright (c) 2006-2011 Pacman Development Team <pacman-dev@archlinux.org>
+ * Copyright (c) 2002-2006 by Judd Vinet <jvinet@zeroflux.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 <errno.h>
+#include <limits.h>
+
+/* libarchive */
+#include <archive.h>
+#include <archive_entry.h>
+
+/* libalpm */
+#include "util.h"
+#include "log.h"
+#include "alpm.h"
+#include "alpm_list.h"
+#include "package.h"
+#include "handle.h"
+#include "delta.h"
+#include "deps.h"
+#include "dload.h"
+
+/** Update a package database
+ *
+ * An update of the package database \a db will be attempted. Unless
+ * \a force is true, the update will only be performed if the remote
+ * database was modified since the last update.
+ *
+ * A transaction is necessary for this operation, in order to obtain a
+ * database lock. During this transaction the front-end will be informed
+ * of the download progress of the database via the download callback.
+ *
+ * Example:
+ * @code
+ * alpm_list_t *syncs = alpm_option_get_syncdbs();
+ * if(alpm_trans_init(0, NULL, NULL, NULL) == 0) {
+ * for(i = syncs; i; i = alpm_list_next(i)) {
+ * pmdb_t *db = alpm_list_getdata(i);
+ * result = alpm_db_update(0, db);
+ * alpm_trans_release();
+ *
+ * if(result < 0) {
+ * printf("Unable to update database: %s\n", alpm_strerrorlast());
+ * } else if(result == 1) {
+ * printf("Database already up to date\n");
+ * } else {
+ * printf("Database updated\n");
+ * }
+ * }
+ * }
+ * @endcode
+ *
+ * @ingroup alpm_databases
+ * @note After a successful update, the \link alpm_db_get_pkgcache()
+ * package cache \endlink will be invalidated
+ * @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, -1 on error (pm_errno is set accordingly), 1 if up to
+ * to date
+ */
+int SYMEXPORT alpm_db_update(int force, pmdb_t *db)
+{
+ char *dbfile, *syncpath;
+ const char *dbpath;
+ struct stat buf;
+ size_t len;
+ 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));
+
+ if(!alpm_list_find_ptr(handle->dbs_sync, db)) {
+ RET_ERR(PM_ERR_DB_NOT_FOUND, -1);
+ }
+
+ len = strlen(db->treename) + 4;
+ MALLOC(dbfile, len, RET_ERR(PM_ERR_MEMORY, -1));
+ sprintf(dbfile, "%s.db", db->treename);
+
+ dbpath = alpm_option_get_dbpath();
+ len = strlen(dbpath) + 6;
+ MALLOC(syncpath, len, RET_ERR(PM_ERR_MEMORY, -1));
+ sprintf(syncpath, "%s%s", dbpath, "sync/");
+
+ if(stat(syncpath, &buf) != 0) {
+ _alpm_log(PM_LOG_DEBUG, "database dir '%s' does not exist, creating it\n",
+ syncpath);
+ if(_alpm_makepath(syncpath) != 0) {
+ free(dbfile);
+ free(syncpath);
+ RET_ERR(PM_ERR_SYSTEM, -1);
+ }
+ } else if(!S_ISDIR(buf.st_mode)) {
+ _alpm_log(PM_LOG_WARNING, _("removing invalid file: %s\n"), syncpath);
+ if(unlink(syncpath) != 0 || _alpm_makepath(syncpath) != 0) {
+ free(dbfile);
+ free(syncpath);
+ RET_ERR(PM_ERR_SYSTEM, -1);
+ }
+ }
+
+ ret = _alpm_download_single_file(dbfile, db->servers, syncpath, force);
+ free(dbfile);
+ free(syncpath);
+
+ if(ret == 1) {
+ /* files match, do nothing */
+ pm_errno = 0;
+ return(1);
+ } else if(ret == -1) {
+ /* pm_errno was set by the download code */
+ _alpm_log(PM_LOG_DEBUG, "failed to sync db: %s\n", alpm_strerrorlast());
+ return(-1);
+ }
+
+ /* Cache needs to be rebuilt */
+ _alpm_db_free_pkgcache(db);
+
+ return(0);
+}
+
+/* Forward decl so I don't reorganize the whole file right now */
+static int sync_db_read(pmdb_t *db, struct archive *archive,
+ struct archive_entry *entry, pmpkg_t *likely_pkg);
+
+/*
+ * This is the data table used to generate the estimating function below.
+ * "Weighted Avg" means averaging the bottom table values; thus each repo, big
+ * or small, will have equal influence. "Unweighted Avg" means averaging the
+ * sums of the top table columns, thus each package has equal influence. The
+ * final values are calculated by (surprise) averaging the averages, because
+ * why the hell not.
+ *
+ * Database Pkgs tar bz2 gz xz
+ * community 2096 5294080 256391 421227 301296
+ * core 180 460800 25257 36850 29356
+ * extra 2606 6635520 294647 470818 339392
+ * multilib 126 327680 16120 23261 18732
+ * testing 76 204800 10902 14348 12100
+ *
+ * Bytes Per Package
+ * community 2096 2525.80 122.32 200.97 143.75
+ * core 180 2560.00 140.32 204.72 163.09
+ * extra 2606 2546.25 113.06 180.67 130.23
+ * multilib 126 2600.63 127.94 184.61 148.67
+ * testing 76 2694.74 143.45 188.79 159.21
+
+ * Weighted Avg 2585.48 129.42 191.95 148.99
+ * Unweighted Avg 2543.39 118.74 190.16 137.93
+ * Average of Avgs 2564.44 124.08 191.06 143.46
+ */
+static size_t estimate_package_count(struct stat *st, struct archive *archive)
+{
+ unsigned int per_package;
+
+ switch(archive_compression(archive)) {
+ case ARCHIVE_COMPRESSION_NONE:
+ per_package = 2564;
+ break;
+ case ARCHIVE_COMPRESSION_GZIP:
+ per_package = 191;
+ break;
+ case ARCHIVE_COMPRESSION_BZIP2:
+ per_package = 124;
+ break;
+ case ARCHIVE_COMPRESSION_COMPRESS:
+ per_package = 193;
+ break;
+ case ARCHIVE_COMPRESSION_LZMA:
+ case ARCHIVE_COMPRESSION_XZ:
+ per_package = 143;
+ break;
+ case ARCHIVE_COMPRESSION_UU:
+ per_package = 3543;
+ break;
+ default:
+ /* assume it is at least somewhat compressed */
+ per_package = 200;
+ }
+ return((size_t)(st->st_size / per_package) + 1);
+}
+
+static int sync_db_populate(pmdb_t *db)
+{
+ size_t est_count;
+ int count = 0;
+ struct stat buf;
+ struct archive *archive;
+ struct archive_entry *entry;
+ pmpkg_t *pkg = NULL;
+
+ ALPM_LOG_FUNC;
+
+ ASSERT(db != NULL, RET_ERR(PM_ERR_DB_NULL, -1));
+
+ if((archive = archive_read_new()) == NULL)
+ RET_ERR(PM_ERR_LIBARCHIVE, 1);
+
+ archive_read_support_compression_all(archive);
+ archive_read_support_format_all(archive);
+
+ if(archive_read_open_filename(archive, _alpm_db_path(db),
+ ARCHIVE_DEFAULT_BYTES_PER_BLOCK) != ARCHIVE_OK) {
+ _alpm_log(PM_LOG_ERROR, _("could not open %s: %s\n"), _alpm_db_path(db),
+ archive_error_string(archive));
+ archive_read_finish(archive);
+ RET_ERR(PM_ERR_DB_OPEN, 1);
+ }
+ if(stat(_alpm_db_path(db), &buf) != 0) {
+ RET_ERR(PM_ERR_DB_OPEN, 1);
+ }
+ est_count = estimate_package_count(&buf, archive);
+
+ /* initialize hash at 66% full */
+ db->pkgcache = _alpm_pkghash_create(est_count * 3 / 2);
+ if(db->pkgcache == NULL) {
+ RET_ERR(PM_ERR_MEMORY, -1);
+ }
+
+ while(archive_read_next_header(archive, &entry) == ARCHIVE_OK) {
+ const struct stat *st;
+
+ st = archive_entry_stat(entry);
+
+ if(S_ISDIR(st->st_mode)) {
+ const char *name;
+
+ pkg = _alpm_pkg_new();
+ if(pkg == NULL) {
+ archive_read_finish(archive);
+ RET_ERR(PM_ERR_MEMORY, -1);
+ }
+
+ name = archive_entry_pathname(entry);
+
+ if(_alpm_splitname(name, pkg) != 0) {
+ _alpm_log(PM_LOG_ERROR, _("invalid name for database entry '%s'\n"),
+ name);
+ _alpm_pkg_free(pkg);
+ continue;
+ }
+
+ /* duplicated database entries are not allowed */
+ if(_alpm_pkghash_find(db->pkgcache, pkg->name)) {
+ _alpm_log(PM_LOG_ERROR, _("duplicated database entry '%s'\n"), pkg->name);
+ _alpm_pkg_free(pkg);
+ continue;
+ }
+
+ pkg->origin = PKG_FROM_SYNCDB;
+ pkg->ops = &default_pkg_ops;
+ pkg->origin_data.db = db;
+
+ /* add to the collection */
+ _alpm_log(PM_LOG_FUNCTION, "adding '%s' to package cache for db '%s'\n",
+ pkg->name, db->treename);
+ db->pkgcache = _alpm_pkghash_add(db->pkgcache, pkg);
+ count++;
+ } else {
+ /* we have desc, depends or deltas - parse it */
+ sync_db_read(db, archive, entry, pkg);
+ }
+ }
+
+ if(count > 0) {
+ db->pkgcache->list = alpm_list_msort(db->pkgcache->list, (size_t)count, _alpm_pkg_cmp);
+ }
+ archive_read_finish(archive);
+
+ return(count);
+}
+
+#define READ_NEXT(s) do { \
+ if(_alpm_archive_fgets(archive, &buf) != ARCHIVE_OK) goto error; \
+ s = _alpm_strtrim(buf.line); \
+} while(0)
+
+#define READ_AND_STORE(f) do { \
+ READ_NEXT(line); \
+ STRDUP(f, line, goto error); \
+} while(0)
+
+#define READ_AND_STORE_ALL(f) do { \
+ char *linedup; \
+ READ_NEXT(line); \
+ if(strlen(line) == 0) break; \
+ STRDUP(linedup, line, goto error); \
+ f = alpm_list_add(f, linedup); \
+} while(1) /* note the while(1) and not (0) */
+
+static int sync_db_read(pmdb_t *db, struct archive *archive,
+ struct archive_entry *entry, pmpkg_t *likely_pkg)
+{
+ const char *entryname = NULL, *filename;
+ char *pkgname, *p, *q;
+ pmpkg_t *pkg;
+ struct archive_read_buffer buf;
+
+ ALPM_LOG_FUNC;
+
+ if(db == NULL) {
+ RET_ERR(PM_ERR_DB_NULL, -1);
+ }
+
+ if(entry != NULL) {
+ entryname = archive_entry_pathname(entry);
+ }
+ if(entryname == NULL) {
+ _alpm_log(PM_LOG_DEBUG, "invalid archive entry provided to _alpm_sync_db_read, skipping\n");
+ return(-1);
+ }
+
+ _alpm_log(PM_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;
+
+ /* get package and db file names */
+ STRDUP(pkgname, entryname, RET_ERR(PM_ERR_MEMORY, -1));
+ p = pkgname + strlen(pkgname);
+ for(q = --p; *q && *q != '/'; q--);
+ filename = q + 1;
+ for(p = --q; *p && *p != '-'; p--);
+ for(q = --p; *q && *q != '-'; q--);
+ *q = '\0';
+
+ /* package is already in db due to parsing of directory name */
+ if(likely_pkg && strcmp(likely_pkg->name, pkgname) == 0) {
+ pkg = likely_pkg;
+ } else {
+ if(db->pkgcache == NULL) {
+ RET_ERR(PM_ERR_MEMORY, -1);
+ }
+ pkg = _alpm_pkghash_find(db->pkgcache, pkgname);
+ }
+ if(pkg == NULL) {
+ _alpm_log(PM_LOG_DEBUG, "package %s not found in %s sync database",
+ pkgname, db->treename);
+ return(-1);
+ }
+
+ if(strcmp(filename, "desc") == 0 || strcmp(filename, "depends") == 0
+ || strcmp(filename, "deltas") == 0) {
+ while(_alpm_archive_fgets(archive, &buf) == ARCHIVE_OK) {
+ char *line = _alpm_strtrim(buf.line);
+
+ if(strcmp(line, "%NAME%") == 0) {
+ READ_NEXT(line);
+ if(strcmp(line, pkg->name) != 0) {
+ _alpm_log(PM_LOG_ERROR, _("%s database is inconsistent: name "
+ "mismatch on package %s\n"), db->treename, pkg->name);
+ }
+ } else if(strcmp(line, "%VERSION%") == 0) {
+ READ_NEXT(line);
+ if(strcmp(line, pkg->version) != 0) {
+ _alpm_log(PM_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(line);
+ pkg->builddate = _alpm_parsedate(line);
+ } else if(strcmp(line, "%PACKAGER%") == 0) {
+ READ_AND_STORE(pkg->packager);
+ } else if(strcmp(line, "%CSIZE%") == 0) {
+ /* Note: the CSIZE and SIZE fields both share the "size" field in the
+ * pkginfo_t struct. This can be done b/c CSIZE is currently only used
+ * in sync databases, and SIZE is only used in local databases.
+ */
+ READ_NEXT(line);
+ pkg->size = atol(line);
+ /* also store this value to isize if isize is unset */
+ if(pkg->isize == 0) {
+ pkg->isize = pkg->size;
+ }
+ } else if(strcmp(line, "%ISIZE%") == 0) {
+ READ_NEXT(line);
+ pkg->isize = atol(line);
+ } else if(strcmp(line, "%MD5SUM%") == 0) {
+ READ_AND_STORE(pkg->md5sum);
+ } else if(strcmp(line, "%REPLACES%") == 0) {
+ READ_AND_STORE_ALL(pkg->replaces);
+ } else if(strcmp(line, "%DEPENDS%") == 0) {
+ /* Different than the rest because of the _alpm_splitdep call. */
+ while(1) {
+ READ_NEXT(line);
+ if(strlen(line) == 0) break;
+ pkg->depends = alpm_list_add(pkg->depends, _alpm_splitdep(line));
+ }
+ } else if(strcmp(line, "%OPTDEPENDS%") == 0) {
+ READ_AND_STORE_ALL(pkg->optdepends);
+ } else if(strcmp(line, "%CONFLICTS%") == 0) {
+ READ_AND_STORE_ALL(pkg->conflicts);
+ } else if(strcmp(line, "%PROVIDES%") == 0) {
+ READ_AND_STORE_ALL(pkg->provides);
+ } else if(strcmp(line, "%DELTAS%") == 0) {
+ READ_AND_STORE_ALL(pkg->deltas);
+ }
+ }
+ } else {
+ /* unknown database file */
+ _alpm_log(PM_LOG_DEBUG, "unknown database file: %s", filename);
+ }
+
+error:
+ FREE(pkgname);
+ /* TODO: return 0 always? */
+ return(0);
+}
+
+static int sync_db_version(pmdb_t *db)
+{
+ return(2);
+}
+
+struct db_operations sync_db_ops = {
+ .populate = sync_db_populate,
+ .unregister = _alpm_db_unregister,
+ .version = sync_db_version,
+};
+
+pmdb_t *_alpm_db_register_sync(const char *treename)
+{
+ pmdb_t *db;
+ 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);
+
+ db = _alpm_db_new(treename, 0);
+ if(db == NULL) {
+ RET_ERR(PM_ERR_DB_CREATE, NULL);
+ }
+ db->ops = &sync_db_ops;
+
+ handle->dbs_sync = alpm_list_add(handle->dbs_sync, db);
+ return(db);
+}
+
+
+/* vim: set ts=2 sw=2 noet: */
generated by cgit v1.2.3-24-g4f1b (git 2.32.0) at 2024-11-19 04:00:03 +0100