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Date: Mon, 13 Feb 2006 05:50:31 -0800 (PST)
From: "James R. Phillips" <antiskid56-octave AT yahoo DOT com>
Reply-To: antiskid56-octave AT yahoo DOT com
Subject: Fwd: octave does not recurse LOADPATH directories located on the network in cygwin
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--- Larrie Carr  wrote:

> Subject: octave does not recurse LOADPATH directories located on the network
> in cygwin
> From: "Larrie Carr"
> To: <bug AT octave DOT org>
> Date: Sun, 12 Feb 2006 17:38:40 -0600
> 
> In a cygwin environment, octave does not recursively search through LOADPATH
> directories if the directories are located on network drives.
> 
> The problem is due to the use of stat() to calculate link_num in dir_link()
> in kpse.cc.  In a cygwin environment, stat() always reports 1 for a
> directory located on a network drive.  A test case using stat on the command
> line where the root of cygwin is stored on a network drive (x: in this
> case).
> 
> $stat -c "%h %f" /cygdrive/c/test
> 2 41c0
> 
> $stat -c "%h %f" /usr/share/octave
> 1 41ed
> 
> $stat -c "%h %f" /cygdrive/x/cygwin/usr/share/octave
> 1 41ed
> 
> $ls -l /usr/share/octave
> total 0
> drwxr-xr-x 1 larrie mkpasswd 0 Feb   8 23.31 2.1.72
> drwxr-xr-x 1 larrie mkpasswd 0 Feb   8 23.31 site
> 
> Looking at 2.1.72,  The code within do_subdir() does not handle 1 as a 
> subdirectory as it
> expects a non-empty subdirectory is >2.
> 
> I don't know why cygwin only reports 1 for a network drive, except other
> people have seen this.  For instance, perl on cygwin,
> 
> http://www.scit.wlv.ac.uk/~jphb/perl/pod/perlcygwin.html
> Hard Links
> FAT partitions do not support hard links (whereas NTFS does), in which case
> Cygwin implements link() by copying the file. On remote (network) drives
> Cygwin's stat() always sets st_nlink to 1, so the link count for remote
> directories and files is not available. In either case, these tests will
> fail:
> 
>   Failed Test           List of failed
>   ------------------------------------
>   io/fs.t               4
>   op/stat.t             3
> 
> However, stat() always correctly identifies the path as a directory.   I
> guess a fix would be to remove the optimization so that every subdirectory
> is recursed into and then handle the "." cases as before to allow empty
> directories to work as before.
> 
> Larrie.
> 

Thanks very much for your investigation.  I will await upstream action on this
issue.  Forwarding to the cygwin mailing list for comment.

James R. Phillips
cygwin octave packager





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