commit f1f7b59dab0c09402790daa04441fac435f52e26
Author: Panu Matilainen <pmatilai@redhat.com>
Date:   Fri Jan 21 09:32:58 2011 +0200

    Permit queries from rpmdb on read-only media (RhBug:671200)
    (cherry picked from commit a429c99e13fbe9926243f29b78df8d64222c4469)

diff --git a/lib/backend/db3.c b/lib/backend/db3.c
index 45b5363..365cd13 100644
--- a/lib/backend/db3.c
+++ b/lib/backend/db3.c
@@ -171,7 +171,7 @@ static int db_init(rpmdb rdb, const char * dbhome)
 	free(fstr);
 
 	rc = (dbenv->open)(dbenv, dbhome, eflags, rdb->db_perms);
-	if (rc == EACCES) {
+	if (rc == EACCES || rc == EROFS) {
 	    eflags |= DB_PRIVATE;
 	    retry_open--;
 	} else {