(fts_open): Fail with EINVAL if a caller violates this rule:

Either FTS_LOGICAL or FTS_PHYSICAL must be provided to the
fts_open() function.

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/fts.c b/lib/fts.c
index 2d4e33321..5ea139700 100644
--- a/lib/fts.c
+++ b/lib/fts.c
@@ -291,6 +291,10 @@ fts_open (char * const *argv,
 		__set_errno (EINVAL);
 		return (NULL);
 	}
+	if ( ! (options & (FTS_LOGICAL | FTS_PHYSICAL))) {
+		__set_errno (EINVAL);
+		return (NULL);
+	}
 
 	/* Allocate/initialize the stream */
 	if ((sp = malloc(sizeof(FTS))) == NULL)