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#!perl
# vim:ts=4:sw=4:et
use strict;
use warnings;
use Test::More;
use File::Temp qw(tempfile tempdir); # in core since perl 5.6.1
use File::Path qw(make_path); # in core since Perl 5.001
use File::Basename; # in core since Perl 5
use FindBin; # in core since Perl 5.00307
use Linux::Clone; # neither in core nor in Debian :-/
# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
# ┃ SETUP: in a new mount namespace, bindmount tmpdirs on /etc/systemd and ┃
# ┃ /var/lib/systemd to start with clean directories yet use the actual ┃
# ┃ locations and code paths. ┃
# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
my $dsh = "$FindBin::Bin/../script/deb-systemd-helper";
# reads in a whole file
sub slurp {
open my $fh, '<', shift;
local $/;
<$fh>;
}
sub state_file_entries {
my ($path) = @_;
my $bytes = slurp($path);
return split("\n", $bytes);
}
sub _unit_enabled {
my ($unit_file, $cb, $verb) = @_;
my $retval = system("DPKG_MAINTSCRIPT_PACKAGE=test $dsh is-enabled $unit_file");
isnt($retval, -1, 'deb-systemd-helper could be executed');
ok(!($retval & 127), 'deb-systemd-helper did not exit due to a signal');
$cb->($retval >> 8, 0, "random unit file $verb enabled");
}
sub is_enabled { _unit_enabled($_[0], \&is, 'is') }
sub isnt_enabled { _unit_enabled($_[0], \&isnt, 'isnt') }
my $retval = Linux::Clone::unshare Linux::Clone::NEWNS;
BAIL_OUT("Cannot unshare(NEWNS): $!") if $retval != 0;
sub bind_mount_tmp {
my ($dir) = @_;
my $tmp = tempdir(CLEANUP => 1);
system("mount -n --bind $tmp $dir") == 0
or BAIL_OUT("bind-mounting $tmp to $dir failed: $!");
return $tmp;
}
unless ($ENV{'TEST_ON_REAL_SYSTEM'}) {
my $etc_systemd = bind_mount_tmp('/etc/systemd');
my $lib_systemd = bind_mount_tmp('/lib/systemd');
my $var_lib_systemd = bind_mount_tmp('/var/lib/systemd');
}
# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
# ┃ Verify “is-enabled” is not true for a random, non-existing unit file. ┃
# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
my ($fh, $random_unit) = tempfile('unitXXXXX',
SUFFIX => '.service',
TMPDIR => 1,
UNLINK => 1);
close($fh);
$random_unit = basename($random_unit);
my $statefile = "/var/lib/systemd/deb-systemd-helper-enabled/$random_unit.dsh-also";
my $servicefile_path = "/lib/systemd/system/$random_unit";
make_path('/lib/systemd/system');
open($fh, '>', $servicefile_path);
print $fh <<'EOT';
[Unit]
Description=test unit
[Service]
ExecStart=/bin/sleep 1
[Install]
WantedBy=multi-user.target
EOT
close($fh);
# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
# ┃ Verify “enable” creates the requested symlinks. ┃
# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
$retval = system("DPKG_MAINTSCRIPT_PACKAGE=test $dsh enable $random_unit");
my $symlink_path = "/etc/systemd/system/multi-user.target.wants/$random_unit";
ok(-l $symlink_path, "$random_unit was enabled");
is(readlink($symlink_path), $servicefile_path,
"symlink points to $servicefile_path");
# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
# ┃ Verify “is-enabled” now returns true. ┃
# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
is_enabled($random_unit);
# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
# ┃ Modify the unit file and verify that “is-enabled” is no longer true. ┃
# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
open($fh, '>>', $servicefile_path);
print $fh "Alias=newalias.service\n";
close($fh);
isnt_enabled($random_unit);
# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
# ┃ Verify “was-enabled” is still true (operates on the state file). ┃
# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
$retval = system("DPKG_MAINTSCRIPT_PACKAGE=test $dsh was-enabled $random_unit");
isnt($retval, -1, 'deb-systemd-helper could be executed');
ok(!($retval & 127), 'deb-systemd-helper did not exit due to a signal');
is($retval >> 8, 0, "random unit file was-enabled");
# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
# ┃ Verify the new symlink is not yet in the state file. ┃
# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
is_deeply(
[ state_file_entries($statefile) ],
[ $symlink_path ],
'state file does not contain the new link yet');
# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
# ┃ Verify “enable” creates the new symlinks. ┃
# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
my $new_symlink_path = '/etc/systemd/system/newalias.service';
ok(! -l $new_symlink_path, 'new symlink does not exist yet');
$retval = system("DPKG_MAINTSCRIPT_PACKAGE=test $dsh enable $random_unit");
ok(-l $new_symlink_path, 'new symlink was created');
is(readlink($new_symlink_path), $servicefile_path,
"symlink points to $servicefile_path");
is_enabled($random_unit);
# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
# ┃ Verify the new symlink was recorded in the state file. ┃
# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
is_deeply(
[ state_file_entries($statefile) ],
[ $symlink_path, $new_symlink_path ],
'state file updated');
# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
# ┃ Modify the unit file and verify that “is-enabled” is no longer true. ┃
# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
open($fh, '>>', $servicefile_path);
print $fh "Alias=another.service\n";
close($fh);
isnt_enabled($random_unit);
# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
# ┃ Verify “was-enabled” is still true (operates on the state file). ┃
# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
$retval = system("DPKG_MAINTSCRIPT_PACKAGE=test $dsh was-enabled $random_unit");
isnt($retval, -1, 'deb-systemd-helper could be executed');
ok(!($retval & 127), 'deb-systemd-helper did not exit due to a signal');
is($retval >> 8, 0, "random unit file was-enabled");
# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
# ┃ Verify the new symlink is not yet in the state file. ┃
# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
is_deeply(
[ state_file_entries($statefile) ],
[ $symlink_path, $new_symlink_path ],
'state file does not contain the new link yet');
# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
# ┃ Verify “update-state” does not create the symlink, but records it in the ┃
# ┃ state file. ┃
# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
my $new_symlink_path2 = '/etc/systemd/system/another.service';
ok(! -l $new_symlink_path2, 'new symlink does not exist yet');
$retval = system("DPKG_MAINTSCRIPT_PACKAGE=test $dsh update-state $random_unit");
ok(! -l $new_symlink_path2, 'new symlink still does not exist');
isnt_enabled($random_unit);
is_deeply(
[ state_file_entries($statefile) ],
[ $symlink_path, $new_symlink_path, $new_symlink_path2 ],
'state file updated');
# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
# ┃ Rewrite the original contents and verify “update-state” removes the old ┃
# ┃ links that are no longer present. ┃
# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
open($fh, '>', $servicefile_path);
print $fh <<'EOT';
[Unit]
Description=test unit
[Service]
ExecStart=/bin/sleep 1
[Install]
WantedBy=multi-user.target
EOT
close($fh);
unlink($new_symlink_path);
ok(! -l $new_symlink_path, 'new symlink still does not exist');
ok(! -l $new_symlink_path2, 'new symlink 2 still does not exist');
$retval = system("DPKG_MAINTSCRIPT_PACKAGE=test $dsh update-state $random_unit");
ok(! -l $new_symlink_path, 'new symlink still does not exist');
ok(! -l $new_symlink_path2, 'new symlink 2 still does not exist');
is_enabled($random_unit);
is_deeply(
[ state_file_entries($statefile) ],
[ $symlink_path ],
'state file updated');
done_testing;