address@hidden: Bug report: Incorrect error message for overwriting file with not enough disk space]

[Bob Rogers]

   From: Richard Stallman <address@hidden>
   Date: Thu, 03 Aug 2006 20:34:44 -0400

   Can anyone arrange to test this for the current version?
   It is important for Emacs to work right in such situations.

   Please ack if you can test it.

I cannot reproduce this.

   ------- Start of forwarded message -------
   Date: Wed, 2 Aug 2006 11:48:17 -0500
   From: "Alex Hemsath" <address@hidden>
   Subject: Bug report: Incorrect error message for overwriting file with not
           enough disk space

   Bug report for Gnu Emacs
   Version: 21.4.2
   OS: Mandriva Linux 2006 Free
   Filesystem: ext3

   Scenario: overwriting (C-x C-w) an existing file, where the new file to be
   written is larger than the available disk space on the filesystem where the
   original file is kept.

   Bug: after confirming that it is okay to overwrite the existing file, the
   error message displayed is "file already exists".
   Expected behavior: error message should read "No space left on device or
   similar".

   strace confirms that emacs is getting the right errno (ENOSPC) for the write
   to the file handle.

   Thanks,
   Alex

I did the following:

   1.  emacs -Q

   2.  "C-x C-f /usr/te TAB fou TAB RET" to read a 4MB file from a 6MB
partition.

   3.  "C-x C-w tri TAB RET" to overwrite the existing zero-length
/usr/test/trial file.

   4.  "SPC" at the "File `/usr/test/trial' exists; overwrite? (y or n)"
prompt to confirm.

   5.  emacs responds with the following messages:

        Saving file /usr/test/trial...
        basic-save-buffer-2: IO error writing /usr/test/trial: No space left on 
device

This is on GNU/Linux (SuSE 9.0), where /usr/test/ is an ext3 partition,
using an Emacs built from CVS on 22-July; is that close enough?  I will
retest with a more up-to-date version, but that may take a while.

                                        -- Bob Rogers
                                           http://rgrjr.dyndns.org/