GNU bug report logs - #31
file-attributes returns negative integer for inode value

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From: help-debbugs <at> gnu.org (Emacs bug Tracking System)
To: Eli Zaretskii <eliz <at> gnu.org>
Subject: bug#31: marked as done (file-attributes returns negative integer 
 for inode value)

[Message part 1 (text/plain, inline)]

Your message dated Fri, 14 Mar 2008 19:31:47 +0200
with message-id <uk5k5i54s.fsf <at> gnu.org>
and subject line Re: file-attributes returns negative integer for inode value
has caused the Emacs bug report #31,
regarding file-attributes returns negative integer for inode value
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
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immediately.)


-- 
31: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=31
Emacs Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: "Drew Adams" <drew.adams <at> oracle.com>
To: <emacs-pretest-bug <at> gnu.org>
Subject: file-attributes returns negative integer for inode value
Date: Sun, 2 Mar 2008 14:46:09 -0800

emacs -Q
 
No reliable recipe to reproduce, but for me, some directories give a
negative inode number for file-attributes. For example:
 
M-x (file-attributes "c:/drews-lisp-20/Screenshots") gives:
 
(t 1 5 5 (18378 24192) (18123 40338) (18123 40337) 0
 "drwxrwxrwx" nil -3082 240391127)
 
The inode value here is -3082. The Elisp manual, however says that if
the integer is too large, then a cons is used for the inode value. Is
this a Windows-specific problem, perhaps?
 
Also, there is a typo in the doc string for `file-attributes':
 
  ...
  If inode number is larger than the Emacs integer,
  this is a cons cell containing two integers: first the high part,
  then the low 16 bits.
 
"the Emacs integer" should presumably be "the largest Emacs integer".
 

In GNU Emacs 22.1.90.1 (i386-mingw-nt5.1.2600)
 of 2008-01-30 on PRETEST
Windowing system distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (3.4) --cflags -Ic:/gnuwin32/include'
 

[Message part 3 (message/rfc822, inline)]

From: Eli Zaretskii <eliz <at> gnu.org>
To: drew.adams <at> oracle.com, emacs-pretest-bug <at> gnu.org
Subject: Re: file-attributes returns negative integer for inode value
Date: Fri, 14 Mar 2008 19:31:47 +0200

> Date: Mon, 03 Mar 2008 06:25:42 +0200
> From: Eli Zaretskii <eliz <at> gnu.org>
> Cc: schwab <at> suse.de, emacs-pretest-bug <at> gnu.org
> 
> The problem is a little bit different: obviously, a 16-bit value
> cannot overflow ab EMACS_INT.  The problem is we don't keep the value
> positive.  I will work on this soon.

(For some value of "soon".)

Done.

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