Introduce PM_TRANS_FLAG_NOLOCK

This flag indicates that the front-end will not call alpm_trans_commit(),
so the database needn't be locked. This is the first step toward fixing
FS#8905.

If this flag is set, alpm_trans_commit() does nothing and returns with
an error (that has new code: PM_ERR_TRANS_NOT_LOCKED).

Signed-off-by: Nagy Gabor <ngaba@bibl.u-szeged.hu>
Signed-off-by: Dan McGee <dan@archlinux.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/libalpm/error.c b/lib/libalpm/error.c
index 47f07508..fdff9ed4 100644
--- a/lib/libalpm/error.c
+++ b/lib/libalpm/error.c
@@ -99,6 +99,8 @@ const char SYMEXPORT *alpm_strerror(int err)
 			return _("transaction aborted");
 		case PM_ERR_TRANS_TYPE:
 			return _("operation not compatible with the transaction type");
+		case PM_ERR_TRANS_NOT_LOCKED:
+			return _("transaction commit attempt when database is not locked");
 		/* Packages */
 		case PM_ERR_PKG_NOT_FOUND:
 			return _("could not find or read package");