commit 58c5eb28d5f267313294486c6f8a7a6c84984d86
Author: Panu Matilainen <pmatilai@redhat.com>
Date:   Thu May 3 16:15:59 2012 +0300

    Fall back to private db environment on system level EINVAL
    
    - BDB wants to use mmap() for its environment by default, but not
      all (file)systems support this, as pointed out by Daniel Drak.
      However env->open() can return EINVAL for a number of reasons,
      require all the fallback reasons to be system level errors to
      differentiate from "logical" errors such as incompatible flags
      to (possibly pre-existing) db environment, in which case we better
      just error out.

diff --git a/lib/backend/db3.c b/lib/backend/db3.c
index 30ed7ac..bbf9577 100644
--- a/lib/backend/db3.c
+++ b/lib/backend/db3.c
@@ -177,7 +177,8 @@ static int db_init(rpmdb rdb, const char * dbhome)
 
     /*
      * Actually open the environment. Fall back to private environment
-     * if we dont have permission to join/create shared environment.
+     * if we dont have permission to join/create shared environment or
+     * system doesn't support it..
      */
     while (retry_open) {
 	char *fstr = prDbiOpenFlags(eflags, 1);
@@ -185,7 +186,7 @@ static int db_init(rpmdb rdb, const char * dbhome)
 	free(fstr);
 
 	rc = (dbenv->open)(dbenv, dbhome, eflags, rdb->db_perms);
-	if (rc == EACCES || rc == EROFS) {
+	if ((rc == EACCES || rc == EROFS || rc == EINVAL) && errno == rc) {
 	    eflags |= DB_PRIVATE;
 	    retry_open--;
 	} else {