OpenBSD-4.6/usr.sbin/pkg_add/OpenBSD/Temp.pm

# ex:ts=8 sw=4:
# $OpenBSD: Temp.pm,v 1.14 2009/04/19 14:58:32 espie Exp $
#
# Copyright (c) 2003-2005 Marc Espie <espie@openbsd.org>
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

use strict;
use warnings;
package OpenBSD::Temp;

use File::Temp;
use OpenBSD::Paths;

our $tempbase = $ENV{'PKG_TMPDIR'} || OpenBSD::Paths->vartmp;

my $dirs = {};
my $files = {};

sub cleanup
{
	my $caught;
	my $h = sub { $caught = shift; };
	{
	    require File::Path;

	    local $SIG{'INT'} = $h;
	    local $SIG{'QUIT'} = $h;
	    local $SIG{'HUP'} = $h;
	    local $SIG{'KILL'} = $h;
	    local $SIG{'TERM'} = $h;

	    while (my ($name, $pid) = each %$files) {
		    unlink($name) if $pid == $$;
	    }
	    while (my ($dir, $pid) = each %$dirs) {
		    File::Path::rmtree([$dir]) if $pid == $$;
	    }
	}
	if (defined $caught) {
		kill $caught, $$;
	}
}

END {
	cleanup();
}

my $handler = sub {
	my ($sig) = @_;
	cleanup();
	$SIG{$sig} = 'DEFAULT';
	kill $sig, $$;
};

$SIG{'INT'} = $handler;
$SIG{'QUIT'} = $handler;
$SIG{'HUP'} = $handler;
$SIG{'KILL'} = $handler;
$SIG{'TERM'} = $handler;

sub dir
{
	my $caught;
	my $h = sub { $caught = shift; };
	my $dir;
		
	{
	    local $SIG{'INT'} = $h;
	    local $SIG{'QUIT'} = $h;
	    local $SIG{'HUP'} = $h;
	    local $SIG{'KILL'} = $h;
	    local $SIG{'TERM'} = $h;
	    $dir = permanent_dir($tempbase, "pkginfo");
	    $dirs->{$dir} = $$;
	}
	if (defined $caught) {
		kill $caught, $$;
	}
	return "$dir/";
}

sub file
{
	my $caught;
	my $h = sub { $caught = shift; };
	my ($fh, $file);
		
	{
	    local $SIG{'INT'} = $h;
	    local $SIG{'QUIT'} = $h;
	    local $SIG{'HUP'} = $h;
	    local $SIG{'KILL'} = $h;
	    local $SIG{'TERM'} = $h;
	    ($fh, $file) = permanent_file($tempbase, "pkgout");
	    $files->{$file} = $$;
	}
	if (defined $caught) {
		kill $caught, $$;
	}
	return $file;
}

sub permanent_file
{
	my ($dir, $stem) = @_;
	my $template = "$stem.XXXXXXXXXX";
	if (defined $dir) {
		$template = "$dir/$template";
	}
	return File::Temp::mkstemp($template);
}

sub permanent_dir
{
	my ($dir, $stem) = @_;
	my $template = "$stem.XXXXXXXXXX";
	if (defined $dir) {
		$template = "$dir/$template";
	}
	return File::Temp::mkdtemp($template);
}

1;