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#
# Chroot.pm: chroot library for sbuild
# Copyright © 2005 Ryan Murray <rmurray@debian.org>
# Copyright © 2005-2008 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::ChrootSchroot;
use strict;
use warnings;
use Sbuild qw(shellescape);
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);
return $self;
}
sub begin_session {
my $self = shift;
my $chroot = $self->get('Chroot ID');
return 0 if !defined $chroot;
# Don't use namespaces in compat mode.
if ($Sbuild::Sysconfig::compat_mode) {
$chroot =~ s/^[^:]+://msx;
}
my $schroot_session
= readpipe($self->get_conf('SCHROOT') . " -c $chroot --begin-session");
chomp($schroot_session);
if ($?) {
print STDERR "Chroot setup failed\n";
my $sbuild_schroot
= `dpkg-query --show --showformat='\${db:Status-Status}' sbuild-schroot`;
if ($sbuild_schroot ne 'installed') {
print STDERR
"Please make sure to have the sbuild-schroot package installed.\n";
}
return 0;
}
$self->set('Session ID', $schroot_session);
print STDERR "Setting up chroot $chroot (session id $schroot_session)\n"
if $self->get_conf('DEBUG');
my $info = $self->get('Chroots')->get_info($schroot_session);
if ( defined($info)
&& defined($info->{'Location'})
&& -d $info->{'Location'}) {
$self->set('Priority', $info->{'Priority'});
$self->set('Location', $info->{'Location'});
$self->set('Session Purged', $info->{'Session Purged'});
} else {
print STDERR $self->get('Chroot ID') . " chroot does not exist\n";
return 0;
}
return 0 if !$self->_setup_options();
return 1;
}
sub end_session {
my $self = shift;
return if $self->get('Session ID') eq "";
print STDERR "Cleaning up chroot (session id "
. $self->get('Session ID') . ")\n"
if $self->get_conf('DEBUG');
system(
$self->get_conf('SCHROOT'), '-c',
$self->get('Session ID'), '--end-session'
);
$self->set('Session ID', "");
if ($?) {
print STDERR "Chroot cleanup failed\n";
return 0;
}
return 1;
}
sub _get_exec_argv {
my $self = shift;
my $dir = shift;
my $user = shift;
my $disable_network = shift // 0;
return (
$self->get_conf('SCHROOT'),
-d => $dir,
-c => $self->get('Session ID'),
'--run-session',
@{ $self->get_conf('SCHROOT_OPTIONS') },
$disable_network ? ('--isolate-network') : (),
-u => $user,
'-p',
'--'
);
}
sub get_internal_exec_string {
my $self = shift;
return if $self->get('Session ID') eq "";
return join " ",
(map { shellescape $_ } $self->_get_exec_argv('/', 'root'));
}
sub get_command_internal {
my $self = shift;
my $options = shift;
return if $self->get('Session ID') eq "";
my $disable_network = 0;
if (defined($options->{'ENABLE_NETWORK'})
&& $options->{'ENABLE_NETWORK'} == 0) {
if ($self->get_conf('SCHROOT') =~ /unschroot/) {
$disable_network = 1;
} else {
print STDERR
"Disabling the network for this command was requested but the schroot backend doesn't support this feature yet: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=802849\n"
if $self->get_conf('DEBUG');
}
}
# 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 = $self->get_conf('USERNAME');
}
if (!defined($dir)) {
$dir = '/';
}
my @cmdline = $self->_get_exec_argv($dir, $user, $disable_network);
if (ref $command) {
push @cmdline, @$command;
} else {
push @cmdline, ('/bin/sh', '-c', $command);
$command = [split(/\s+/, $command)];
}
$options->{'USER'} = $user;
$options->{'COMMAND'} = $command;
$options->{'EXPCOMMAND'} = \@cmdline;
$options->{'CHDIR'} = undef;
$options->{'DIR'} = $dir;
}
1;
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