GNU bug report logs - #10581
exit-hook is undocumented and is not called from a non-interactive environment

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Andrew Psaltis <ampsaltis <at> gmail.com>
Subject: bug#10581: closed (Re: bug#10581: exit-hook is undocumented and
 is not called from a non-interactive environment)
Date: Fri, 06 Jul 2012 12:17:05 +0000

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Your bug report

#10581: exit-hook is undocumented and is not called from a non-interactive environment

which was filed against the guile package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 10581 <at> debbugs.gnu.org.

-- 
10581: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=10581
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Andy Wingo <wingo <at> pobox.com>
To: 10581-done <at> debbugs.gnu.org
Subject: Re: bug#10581: exit-hook is undocumented and is not called from a
	non-interactive environment
Date: Fri, 06 Jul 2012 13:21:41 +0200

Hi,

Closing out this bug, as it seems that the current situation shouldn't
be changed, and also that atexit sounds sufficient.  Please open a new
report if you still have issues :)

Regards,

Andy
-- 
http://wingolog.org/

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From: Andrew Psaltis <ampsaltis <at> gmail.com>
To: bug-guile <at> gnu.org
Subject: exit-hook is undocumented and is not called from a non-interactive
	environment
Date: Sun, 22 Jan 2012 14:58:51 -0500

Currently using guile version 1.8.8.  I have been told that this also
affects the current upstream version as well.

My current project involves using a C library that has some
initialization and cleanup functions.

First:

The library initialization part is well-handled, but I could not find
a way to do the library cleanup part.  After doing some web searches,
I found an answer in "exit-hook", except that it was not clear from
the Guile reference manual that it existed.  It should probably be
documented a little more clearly.

Second:
When I write a scheme script that adds some function to exit-hook, it
is not invoked from a non-interactive call to guile.  I have a file
test.scm that looks like so:

(add-hook! exit-hook (lambda () (display "bye\n")))

In an interactive environment:

$ guile -l test.scm
guile> (exit)
bye
$

In a non-interactive environment:
$ guile -s test.scm
$

Nothing is printed.  As far as I can tell, exit-hook should be made
available in a non-interactive environment so that modules loading
libraries can cleanup easily.

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