Add -depth support.

The resulting order is fairly weird, as files are still returned in
breadth-first order, but directories are returned in a backwards order
based on when their reference counts drop to zero.  But it's good enough
for -delete support.

1 files changed, 2 insertions, 0 deletions

diff --git a/bftw.h b/bftw.h
index a7c14d9..a368777 100644
--- a/bftw.h
+++ b/bftw.h
@@ -98,5 +98,7 @@ int bftw(const char *path, bftw_fn *fn, int nopenfd, int flags, void *ptr);
 #define BFTW_STAT     (1 << 0)
 /** flag: Attempt to recover from encountered errors. */
 #define BFTW_RECOVER  (1 << 1)
+/** flag: Visit all of a directory's descendants before the directory itself. */
+#define BFTW_DEPTH    (1 << 2)
 
 #endif // BFS_BFTW_H