fts: avoid unnecessary strlen calls

Not all platforms have _D_EXACT_NAMLEN.

* lib/fts.c (_D_EXACT_NAMLEN): Restore definition when needed.

Signed-off-by: Eric Blake <eblake@redhat.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/lib/fts.c b/lib/fts.c
index 992bbad777..500e92c6b8 100644
--- a/lib/fts.c
+++ b/lib/fts.c
@@ -79,6 +79,9 @@ static char sccsid[] = "@(#)fts.c       8.6 (Berkeley) 8/14/94";
 #endif
 
 #include <dirent.h>
+#ifndef _D_EXACT_NAMLEN
+# define _D_EXACT_NAMLEN(dirent) strlen ((dirent)->d_name)
+#endif
 
 #if HAVE_STRUCT_DIRENT_D_TYPE
 /* True if the type of the directory entry D is known.  */