unlink: new module, for Solaris 9 bug

[gnulib.git] / lib / fts_.h

diff --git a/lib/fts_.h b/lib/fts_.h
index b9554f2..0e2d505 100644 (file)
--- a/lib/fts_.h
+++ b/lib/fts_.h
@@ -1,6 +1,6 @@
 /* Traverse a file hierarchy.
 
-   Copyright (C) 2004-2008 Free Software Foundation, Inc.
+   Copyright (C) 2004-2009 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -144,6 +144,15 @@ typedef struct {
        int fts_options;                /* fts_open options, global flags */
 
 # if GNULIB_FTS
+       /* Map a directory's device number to a boolean.  The boolean is
+          true if for that file system (type determined by a single fstatfs
+          call per FS) st_nlink can be used to calculate the number of
+          sub-directory entries in a directory.
+          Using this table is an optimization that permits us to look up
+          file system type on a per-inode basis at the minimal cost of
+          calling fstatfs only once per traversed device.  */
+       struct hash_table *fts_leaf_optimization_works_ht;
+
        union {
                /* This data structure is used if FTS_TIGHT_CYCLE_CHECK is
                   specified.  It records the directories between a starting
@@ -192,6 +201,7 @@ typedef struct _ftsent {
        ptrdiff_t fts_level;            /* depth (-1 to N) */
 
        size_t fts_namelen;             /* strlen(fts_name) */
+       nlink_t fts_n_dirs_remaining;   /* count down from st_nlink */
 
 # define FTS_D          1              /* preorder directory */
 # define FTS_DC                 2              /* directory that causes cycles */
@@ -223,12 +233,30 @@ typedef struct _ftsent {
        char fts_name[1];               /* file name */
 } FTSENT;
 
+#ifndef __GNUC_PREREQ
+# if defined __GNUC__ && defined __GNUC_MINOR__
+#  define __GNUC_PREREQ(maj, min) \
+         ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
+# else
+#  define __GNUC_PREREQ(maj, min) 0
+# endif
+#endif
+
+#if __GNUC_PREREQ (3,4)
+# undef __attribute_warn_unused_result__
+# define __attribute_warn_unused_result__ \
+   __attribute__ ((__warn_unused_result__))
+#else
+# define __attribute_warn_unused_result__ /* empty */
+#endif
+
 __BEGIN_DECLS
-FTSENT *fts_children (FTS *, int) __THROW;
-int     fts_close (FTS *) __THROW;
+FTSENT *fts_children (FTS *, int) __THROW __attribute_warn_unused_result__;
+int     fts_close (FTS *) __THROW __attribute_warn_unused_result__;
 FTS    *fts_open (char * const *, int,
-                  int (*)(const FTSENT **, const FTSENT **)) __THROW;
-FTSENT *fts_read (FTS *) __THROW;
+                  int (*)(const FTSENT **, const FTSENT **))
+  __THROW __attribute_warn_unused_result__;
+FTSENT *fts_read (FTS *) __THROW __attribute_warn_unused_result__;
 int     fts_set (FTS *, FTSENT *, int) __THROW;
 __END_DECLS