bugGNU Octave - Bugs: bug #55448, dir() command sometimes returns...


bug #55448: dir() command sometimes returns filenames in the .folder field

Submitted by:  Lars Kindermann <larskindermann>
Submitted on:  Fri 11 Jan 2019 04:36:49 PM UTC  
Category:  Interpreter Severity:  3 - Normal
Priority:  5 - Normal Item Group:  Incorrect Result
Status:  Fixed Assigned to:  None
Originator Name:  Open/Closed:  Closed
Release:  5.1.0 Operating System:  GNU/Linux

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Wed 07 Aug 2019 04:16:13 AM UTC, comment #2: 

I fixed this on the stable branch here https://hg.savannah.gnu.org/hgweb/octave/rev/29e52bcc72af.  The fix preserves the caching mechanism so there is no loss of speed.  This will be part of the next bug fix release.

Rik <rik5>
Project Administrator
Fri 11 Jan 2019 10:33:39 PM UTC, comment #1: 

Confirmed.  The issue is with a caching mechanism in dir.m designed to speed it up.

if (! strcmp (last_dir, tmpdir))
  ## Caching mechanism to speed up function
  last_dir = tmpdir;
  last_absdir = canonicalize_file_name (last_dir);

The function canonicalize_file_name is returning the full absolute path.  Here is a clumsy fix

diff -r 7da6136d3ecd scripts/miscellaneous/dir.m
--- a/scripts/miscellaneous/dir.m        Tue Jan 08 21:35:53 2019 -0800
+++ b/scripts/miscellaneous/dir.m        Fri Jan 11 14:32:17 2019 -0800
@@ -141,6 +141,9 @@ function retval = dir (directory)
           ## Caching mechanism to speed up function
           last_dir = tmpdir;
           last_absdir = canonicalize_file_name (last_dir);
+          if (! isdir (last_absdir))
+            last_absdir = fileparts (last_absdir);
+          endif
         info(i).folder = last_absdir;
         lt = localtime (st.mtime);

Really, the entire caching mechanism needs to be reviewed.  I think the regular expression used may be returning the wrong thing.

Rik <rik5>
Project Administrator
Fri 11 Jan 2019 04:36:49 PM UTC, original submission:  

this works correctly:


ans = /home/kinder/octave
ans = /home/kinder/octave
ans = /home/kinder/octave

but not this:


ans = /home/kinder/octave/audiotest.m
ans = /home/kinder/octave/datenumtest.m
ans = /home/kinder/octave/figclose.m

Lars Kindermann <larskindermann>


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    Follow 5 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2019-08-07 rik5 StatusConfirmed => Fixed
        Open/ClosedOpen => Closed
        Releasedev => 5.1.0
    2019-02-26 mtmiller Release5.0.1 => dev
    2019-01-11 rik5 StatusNone => Confirmed

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