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Ensure dbpath is not null when populating sync database

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We didn't do this sanity check before trying to open an archive. If
the alpm dbpath wasn't set, the sync database dbpath would be NULL,
causing us to hang indefinitely in archive_read_open_filename() rather
than erroring out.

We already have a corresponding check in local_db_populate().

The following program will test this case, and hangs before this patch
without the call to set_dbpath:

	int main(int argc, char *argv[]) {
		alpm_initialize();
		// alpm_option_set_dbpath("/var/lib/pacman/");
		pmdb_t *core = alpm_db_register_sync("core");
		pmpkg_t *pkg = alpm_db_get_pkg(core, "pacman");
		return 0;
	}

Signed-off-by: Dan McGee <dan@archlinux.org>
This commit is contained in:
Dan McGee 2011-04-01 14:31:50 -05:00
parent 20c4928ee1
commit 39fd8bc318
1 changed files with 12 additions and 3 deletions
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15
lib/libalpm/be_sync.c
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@ -209,6 +209,7 @@ static size_t estimate_package_count(struct stat *st, struct archive *archive)
static int sync_db_populate(pmdb_t *db)
{
const char *dbpath;
size_t est_count;
int count = 0;
struct stat buf;
@ -226,14 +227,22 @@ static int sync_db_populate(pmdb_t *db)
archive_read_support_compression_all(archive);
archive_read_support_format_all(archive);
if(archive_read_open_filename(archive, _alpm_db_path(db),
dbpath = _alpm_db_path(db);
if(!dbpath) {
/* pm_errno set in _alpm_db_path() */
return 1;
}
_alpm_log(PM_LOG_DEBUG, "opening database archive %s\n", dbpath);
if(archive_read_open_filename(archive, dbpath,
ARCHIVE_DEFAULT_BYTES_PER_BLOCK) != ARCHIVE_OK) {
_alpm_log(PM_LOG_ERROR, _("could not open file %s: %s\n"), _alpm_db_path(db),
_alpm_log(PM_LOG_ERROR, _("could not open file %s: %s\n"), dbpath,
archive_error_string(archive));
archive_read_finish(archive);
RET_ERR(PM_ERR_DB_OPEN, 1);
}
if(stat(_alpm_db_path(db), &buf) != 0) {
if(stat(dbpath, &buf) != 0) {
RET_ERR(PM_ERR_DB_OPEN, 1);
}
est_count = estimate_package_count(&buf, archive);