Beispiel #1
0
/** Fetch a remote pkg. */
char SYMEXPORT *alpm_fetch_pkgurl(alpm_handle_t *handle, const char *url)
{
	char *filepath;
	const char *cachedir;
	char *final_file = NULL, *final_pkg_url = NULL;
	struct dload_payload payload;
	int ret = 0;

	CHECK_HANDLE(handle, return NULL);
	ASSERT(url, RET_ERR(handle, ALPM_ERR_WRONG_ARGS, NULL));

	/* find a valid cache dir to download to */
	cachedir = _alpm_filecache_setup(handle);

	memset(&payload, 0, sizeof(struct dload_payload));

	/* attempt to find the file in our pkgcache */
	filepath = filecache_find_url(handle, url);
	if(filepath == NULL) {
		STRDUP(payload.fileurl, url, RET_ERR(handle, ALPM_ERR_MEMORY, NULL));
		payload.allow_resume = 1;
		payload.handle = handle;
		payload.trust_remote_name = 1;

		/* download the file */
		ret = _alpm_download(&payload, cachedir, &final_file, &final_pkg_url);
		_alpm_dload_payload_reset(&payload);
		if(ret == -1) {
			_alpm_log(handle, ALPM_LOG_WARNING, _("failed to download %s\n"), url);
			free(final_file);
			return NULL;
		}
		_alpm_log(handle, ALPM_LOG_DEBUG, "successfully downloaded %s\n", url);
	}

	/* attempt to download the signature */
	if(ret == 0 && final_pkg_url && (handle->siglevel & ALPM_SIG_PACKAGE)) {
		char *sig_filepath, *sig_final_file = NULL;
		size_t len;

		len = strlen(final_pkg_url) + 5;
		MALLOC(payload.fileurl, len, RET_ERR(handle, ALPM_ERR_MEMORY, NULL));
		snprintf(payload.fileurl, len, "%s.sig", final_pkg_url);

		sig_filepath = filecache_find_url(handle, payload.fileurl);
		if(sig_filepath == NULL) {
			payload.handle = handle;
			payload.trust_remote_name = 1;
			payload.force = 1;
			payload.errors_ok = (handle->siglevel & ALPM_SIG_PACKAGE_OPTIONAL);

			/* set hard upper limit of 16KiB */
			payload.max_size = 16 * 1024;

			ret = _alpm_download(&payload, cachedir, &sig_final_file, NULL);
			if(ret == -1 && !payload.errors_ok) {
				_alpm_log(handle, ALPM_LOG_WARNING,
						_("failed to download %s\n"), payload.fileurl);
				/* Warn now, but don't return NULL. We will fail later during package
				 * load time. */
			} else if(ret == 0) {
				_alpm_log(handle, ALPM_LOG_DEBUG,
						"successfully downloaded %s\n", payload.fileurl);
			}
			FREE(sig_final_file);
		}
		free(sig_filepath);
		_alpm_dload_payload_reset(&payload);
	}

	/* we should be able to find the file the second time around */
	if(filepath == NULL) {
		filepath = _alpm_filecache_find(handle, final_file);
	}
	free(final_file);

	return filepath;
}
Beispiel #2
0
/** 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.
 *
 * This operation requires a database lock, and will return an applicable error
 * if the lock could not be obtained.
 *
 * Example:
 * @code
 * alpm_list_t *syncs = alpm_get_syncdbs();
 * for(i = syncs; i; i = alpm_list_next(i)) {
 *     alpm_db_t *db = alpm_list_getdata(i);
 *     result = alpm_db_update(0, db);
 *
 *     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, alpm_db_t *db)
{
	char *syncpath;
	alpm_list_t *i;
	int ret = -1;
	mode_t oldmask;
	alpm_handle_t *handle;
	alpm_siglevel_t level;

	/* Sanity checks */
	ASSERT(db != NULL, return -1);
	handle = db->handle;
	handle->pm_errno = 0;
	ASSERT(db != handle->db_local, RET_ERR(handle, ALPM_ERR_WRONG_ARGS, -1));
	ASSERT(db->servers != NULL, RET_ERR(handle, ALPM_ERR_SERVER_NONE, -1));

	syncpath = get_sync_dir(handle);
	if(!syncpath) {
		return -1;
	}

	/* make sure we have a sane umask */
	oldmask = umask(0022);

	level = alpm_db_get_siglevel(db);

	/* attempt to grab a lock */
	if(_alpm_handle_lock(handle)) {
		free(syncpath);
		umask(oldmask);
		RET_ERR(handle, ALPM_ERR_HANDLE_LOCK, -1);
	}

	for(i = db->servers; i; i = i->next) {
		const char *server = i->data;
		struct dload_payload payload;
		size_t len;
		int sig_ret = 0;

		memset(&payload, 0, sizeof(struct dload_payload));

		/* set hard upper limit of 25MiB */
		payload.max_size = 25 * 1024 * 1024;

		/* print server + filename into a buffer */
		len = strlen(server) + strlen(db->treename) + 5;
		/* TODO fix leak syncpath and umask unset */
		MALLOC(payload.fileurl, len, RET_ERR(handle, ALPM_ERR_MEMORY, -1));
		snprintf(payload.fileurl, len, "%s/%s.db", server, db->treename);
		payload.handle = handle;
		payload.force = force;
		payload.unlink_on_fail = 1;

		ret = _alpm_download(&payload, syncpath, NULL);
		_alpm_dload_payload_reset(&payload);

		if(ret == 0 && (level & ALPM_SIG_DATABASE)) {
			/* an existing sig file is no good at this point */
			char *sigpath = _alpm_sigpath(handle, _alpm_db_path(db));
			if(!sigpath) {
				ret = -1;
				break;
			}
			unlink(sigpath);
			free(sigpath);

			/* if we downloaded a DB, we want the .sig from the same server */
			/* print server + filename into a buffer (leave space for .sig) */
			len = strlen(server) + strlen(db->treename) + 9;
			/* TODO fix leak syncpath and umask unset */
			MALLOC(payload.fileurl, len, RET_ERR(handle, ALPM_ERR_MEMORY, -1));
			snprintf(payload.fileurl, len, "%s/%s.db.sig", server, db->treename);
			payload.handle = handle;
			payload.force = 1;
			payload.errors_ok = (level & ALPM_SIG_DATABASE_OPTIONAL);

			/* set hard upper limit of 16KiB */
			payload.max_size = 16 * 1024;

			sig_ret = _alpm_download(&payload, syncpath, NULL);
			/* errors_ok suppresses error messages, but not the return code */
			sig_ret = payload.errors_ok ? 0 : sig_ret;
			_alpm_dload_payload_reset(&payload);
		}

		if(ret != -1 && sig_ret != -1) {
			break;
		}
	}

	if(ret == 1) {
		/* files match, do nothing */
		handle->pm_errno = 0;
		goto cleanup;
	} else if(ret == -1) {
		/* pm_errno was set by the download code */
		_alpm_log(handle, ALPM_LOG_DEBUG, "failed to sync db: %s\n",
				alpm_strerror(handle->pm_errno));
		goto cleanup;
	}

	/* Cache needs to be rebuilt */
	_alpm_db_free_pkgcache(db);

	/* clear all status flags regarding validity/existence */
	db->status &= ~DB_STATUS_VALID;
	db->status &= ~DB_STATUS_INVALID;
	db->status &= ~DB_STATUS_EXISTS;
	db->status &= ~DB_STATUS_MISSING;

	if(sync_db_validate(db)) {
		/* pm_errno should be set */
		ret = -1;
	}

cleanup:

	if(_alpm_handle_unlock(handle)) {
		_alpm_log(handle, ALPM_LOG_WARNING, _("could not remove lock file %s\n"),
				handle->lockfile);
	}
	free(syncpath);
	umask(oldmask);
	return ret;
}