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#
# Chroot.pm: chroot library for sbuild
# Copyright © 2005 Ryan Murray <rmurray@debian.org>
# Copyright © 2005-2006 Roger Leigh <rleigh@debian.org>
# Copyright © 2008 Simon McVittie <smcv@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
# <http://www.gnu.org/licenses/>.
#
#######################################################################
package Sbuild::ChrootPlain;
use strict;
use warnings;
use Sbuild qw(shellescape);
use POSIX;
use FileHandle;
use File::Temp ();
use Sbuild::Sysconfig;
BEGIN {
use Exporter ();
use Sbuild::Chroot;
our (@ISA, @EXPORT);
@ISA = qw(Exporter Sbuild::Chroot);
@EXPORT = qw();
}
sub new {
my $class = shift;
my $conf = shift;
my $chroot_id = shift;
my $self = $class->SUPER::new($conf, $chroot_id);
bless($self, $class);
# Only run split, because plain makes no guarantee that networking
# works inside the chroot.
$self->set('Split', 1);
return $self;
}
sub begin_session {
my $self = shift;
$self->set('Priority', 0);
$self->set('Location', $self->get('Chroot ID'));
$self->set('Session Purged', 0);
return 0 if !defined $self->get('Chroot ID');
# only setup plain chroot if the directory is not the root of the host
if ($self->get('Location') ne '/') {
return 0 if !$self->_setup_options();
}
return 1;
}
sub end_session {
my $self = shift;
# No-op for sudo.
return 1;
}
sub get_command_internal {
my $self = shift;
my $options = shift;
# Command to run. If I have a string, use it. Otherwise use the list-ref
my $command = $options->{'INTCOMMAND_STR'} // $options->{'INTCOMMAND'};
my $user = $options->{'USER'}; # User to run command under
my $dir; # Directory to use (optional)
$dir = $self->get('Defaults')->{'DIR'} if
(defined($self->get('Defaults')) &&
defined($self->get('Defaults')->{'DIR'}));
$dir = $options->{'DIR'} if
defined($options->{'DIR'}) && $options->{'DIR'};
if (!defined $user || $user eq "") {
$user = $self->get_conf('USERNAME');
}
my @cmdline;
if (!defined($dir)) {
$dir = '/';
}
my $need_chroot = 0;
$need_chroot = 1
if ($self->get('Location') ne '/');
my $need_su = 0;
$need_su = 1
if (($need_chroot && $user ne 'root') ||
(!$need_chroot && $user ne $self->get_conf('USERNAME')));
push(@cmdline, $self->get_conf('SUDO'))
if (($need_chroot || $need_su) && $user ne 'root');
push(@cmdline, '/usr/sbin/chroot', $self->get('Location'))
if ($need_chroot);
push(@cmdline, $self->get_conf('SU'), "$user", '-s')
if ($need_su);
if( ref $command ) {
my $shellcommand;
foreach (@$command) {
my $tmp = $_;
if ($shellcommand) {
$shellcommand .= " " . shellescape $tmp;
} else {
$shellcommand = shellescape $tmp;
}
}
push(@cmdline, '/bin/sh', '-c', "cd " . (shellescape $dir) . " && $shellcommand");
} else {
push(@cmdline, '/bin/sh', '-c', "cd " . (shellescape $dir) . " && ( $command )");
}
$options->{'USER'} = $user;
$options->{'COMMAND'} = ref($command) ? $command : [split(/\s+/, $command)];
$options->{'EXPCOMMAND'} = \@cmdline;
$options->{'CHDIR'} = undef;
$options->{'DIR'} = $dir;
}
1;
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