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# Copyright © 2002 Adam Heath <doogie@debian.org>
# Copyright © 2012-2013 Guillem Jover <guillem@debian.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
package Dpkg::Exit;
use strict;
use warnings;
our $VERSION = '1.01';
use Exporter qw(import);
our @EXPORT_OK = qw(push_exit_handler pop_exit_handler run_exit_handlers);
# XXX: Backwards compatibility, stop exporting on VERSION 2.00.
## no critic (Variables::ProhibitPackageVars)
our @handlers = ();
## use critic
=encoding utf8
=head1 NAME
Dpkg::Exit - program exit handlers
=head1 DESCRIPTION
The Dpkg::Exit module provides support functions to run handlers on exit.
=head1 FUNCTIONS
=over 4
=item push_exit_handler($func)
Register a code reference into the exit function handlers stack.
=cut
sub push_exit_handler {
my ($func) = shift;
push @handlers, $func;
}
=item pop_exit_handler()
Pop the last registered exit handler from the handlers stack.
=cut
sub pop_exit_handler {
pop @handlers;
}
=item run_exit_handlers()
Run the registered exit handlers.
=cut
sub run_exit_handlers {
&$_() foreach (reverse @handlers);
}
sub exit_handler {
run_exit_handlers();
exit(127);
}
$SIG{INT} = \&exit_handler;
$SIG{HUP} = \&exit_handler;
$SIG{QUIT} = \&exit_handler;
=back
=head1 CHANGES
=head2 Version 1.01
New functions: push_exit_handler(), pop_exit_handler(), run_exit_handlers()
Deprecated variable: @handlers
=cut
1;