Big performance improvement for fts-based tools that use FTS_NOSTAT.

[gnulib.git] / ChangeLog

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+2006-10-12  Jim Meyering  <jim@meyering.net>
+
+       Big performance improvement for fts-based tools that use FTS_NOSTAT.
+       Avoid spurious inode-mismatch problems on non-POSIX file systems.
+       Details: http://article.gmane.org/gmane.comp.lib.gnulib.bugs/7416
+       * lib/fts_.h (FTS_DEFER_STAT): Define new flag.
+       (FTS_OPTIONMASK): Extend the mask to reflect this addition.
+       * lib/fts.c (DT_IS_KNOWN, DT_MUST_BE): Define.
+       (FTS_NO_STAT_REQUIRED, FTS_STAT_REQUIRED): Define.
+       (fts_set_stat_required): New function.
+       (fts_open): Defer the calls to fts_stat, if possible or requested.
+       Move the code that maps a command-line fts_info value FTS_DOT to FTS_D
+       into fts_stat itself.
+       (fts_read): Perform any required (deferred) fts_stat call.
+       (fts_build): Likewise, for the directory we're about to open and read.
+       In the readdir loop, carefully decide whether each entry will require
+       an eventual call to fts_stat, using dirent.d_type info if available.
+       (fts_stat): Move the test for whether to honor FTS_COMFOLLOW on
+       a command line argument into this function.  Update all callers.
+       Map a return value of FTS_DOT to FTS_D for a command line argument.
+       * modules/fts (Depends-on): Add d-type.  Alphabetize.
+       Thanks to Miklos Szeredi for his tenacity and for the initial
+       bug report about "find" failing on a FUSE-based file system.
+
 2006-10-12  Paul Eggert  <eggert@cs.ucla.edu>
 
        * m4/extensions.m4 (AC_USE_SYSTEM_EXTENSIONS): Renamed from