The flag is needed to implement the -noleaf option of find.
* lib/fts.c (link_count_optimize_ok): Implement the FTS_NOLEAF flag.
* lib/fts_.h (FTS_NOLEAF): New macro, shifted conflicting constants.
---
lib/fts.c | 4 ++++
lib/fts_.h | 12 +++++++++---
2 files changed, 13 insertions(+), 3 deletions(-)
diff --git a/lib/fts.c b/lib/fts.c
index ea73675..76bbc06 100644
--- a/lib/fts.c
+++ b/lib/fts.c
@@ -781,6 +781,10 @@ link_count_optimize_ok (FTSENT const *p)
bool opt_ok;
struct LCO_ent *t2;
+ if (ISSET(FTS_NOLEAF))
+ /* leaf optimization explicitly disabled by the FTS_NOLEAF flag */
+ return false;
+
/* If we're not in CWDFD mode, don't bother with this optimization,
since the caller is not serious about performance. */
if (!ISSET(FTS_CWDFD))
diff --git a/lib/fts_.h b/lib/fts_.h
index b9a3f12..1a500fc 100644
--- a/lib/fts_.h
+++ b/lib/fts_.h
@@ -155,10 +155,16 @@ typedef struct {
from input path names during fts_open initialization. */
# define FTS_VERBATIM 0x1000
-# define FTS_OPTIONMASK 0x1fff /* valid user option mask */
+ /* Disable leaf optimization (which eliminates stat() calls during traversal,
+ based on the count of nested directories stored in stat.st_nlink of each
+ directory). Note that the optimization is by default enabled only for
+ selected file systems, and only if the FTS_CWDFD flag is set. */
+# define FTS_NOLEAF 0x2000
-# define FTS_NAMEONLY 0x2000 /* (private) child names only */
-# define FTS_STOP 0x4000 /* (private) unrecoverable error */
+# define FTS_OPTIONMASK 0x3fff /* valid user option mask */
+
+# define FTS_NAMEONLY 0x4000 /* (private) child names only */
+# define FTS_STOP 0x8000 /* (private) unrecoverable error */
int fts_options; /* fts_open options, global flags */
/* Map a directory's device number to a boolean. The boolean is
--
2.5.0
