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Re: directory caching anomalies in win32
From: |
Eli Zaretskii |
Subject: |
Re: directory caching anomalies in win32 |
Date: |
Tue, 24 Apr 2007 01:07:41 +0300 |
> Date: Mon, 23 Apr 2007 07:45:03 -0700 (PDT)
> From: Aaron Shatters <address@hidden>
> Cc: address@hidden
>
> >> Date: Fri, 20 Apr 2007 13:53:31 -0700 (PDT)
> >> From: Aaron Shatters <address@hidden>
> >>
> >> What was the reason for rehashing the directory contents for windows if
> >> the file was not found in the directory cache and the directory has been
> >> modified... but not on any other platforms?
> >
> >Could you please point to the code fragment(s) where you see this
> >difference?
>
> In dir.c -->
>
> if (dir->dirstream == 0)
> {
> #ifdef WINDOWS32
> /*
> * Check to see if directory has changed since last read. FAT
> * filesystems force a rehash always as mtime does not change
> * on directories (ugh!).
> */
> if (dir->path_key)
> {
> if ((dir->fs_flags & FS_FAT) != 0)
> {
> dir->mtime = time ((time_t *) 0);
> rehash = 1;
> }
> else if (stat(dir->path_key, &st) == 0 && st.st_mtime > dir->mtime)
> {
> /* reset date stamp to show most recent re-process. */
> dir->mtime = st.st_mtime;
> rehash = 1;
> }
> /* If it has been already read in, all done. */
> if (!rehash)
> return 0;
> /* make sure directory can still be opened; if not return. */
> dir->dirstream = opendir(dir->path_key);
> if (!dir->dirstream)
> return 0;
> }
> else
> #endif
This fragment handles the problem that inode emulation on Windows
filesystems are not reliable. It replaces the inode check by
`stat'ing the directory whose normalized file name is stored in
dir->path_key.
Does this code really get run when you invoke $wildcard, and why?