FM / sbin

/snap/core20/2866/usr/sbin

Name	Size	Mode	Actions
aa-remove-unknown	3068	0755	edit dl rm
aa-status	8839	0755	edit dl rm
aa-teardown	139	0755	edit dl rm
add-shell	860	0755	edit dl rm
addgroup	37785	0755	edit dl rm
adduser	37785	0755	edit dl rm
agetty	69000	0755	edit dl rm
apparmor_parser	1526368	0755	edit dl rm
apparmor_status	8839	0755	edit dl rm
arpd	80144	0755	edit dl rm
arptables	220488	0755	edit dl rm
arptables-nft	220488	0755	edit dl rm
arptables-nft-restore	220488	0755	edit dl rm
arptables-nft-save	220488	0755	edit dl rm
arptables-restore	220488	0755	edit dl rm
arptables-save	220488	0755	edit dl rm
badblocks	35144	0755	edit dl rm
blkdeactivate	14837	0755	edit dl rm
blkdiscard	35048	0755	edit dl rm
blkid	121096	0755	edit dl rm
blkzone	71912	0755	edit dl rm
blockdev	67816	0755	edit dl rm
bridge	104760	0755	edit dl rm
capsh	31032	0755	edit dl rm
cfdisk	105048	0755	edit dl rm
chcpu	47336	0755	edit dl rm
chgpasswd	67792	0755	edit dl rm
chmem	63720	0755	edit dl rm
chpasswd	59600	0755	edit dl rm
chroot	43352	0755	edit dl rm
cpgr	61784	0755	edit dl rm
cppw	61784	0755	edit dl rm
cryptdisks_start	1544	0755	edit dl rm
cryptdisks_stop	844	0755	edit dl rm
cryptsetup	138792	0755	edit dl rm
cryptsetup-reencrypt	107848	0755	edit dl rm
ctrlaltdel	39144	0755	edit dl rm
debugfs	231224	0755	edit dl rm
delgroup	16495	0755	edit dl rm
deluser	16495	0755	edit dl rm
depmod	170352	0755	edit dl rm
devlink	154080	0755	edit dl rm
dhclient	521200	0755	edit dl rm
dhclient-script	16304	0755	edit dl rm
dmsetup	175128	0755	edit dl rm
dmstats	175128	0755	edit dl rm
dosfsck	59472	0755	edit dl rm
dosfslabel	55376	0755	edit dl rm
dumpe2fs	31112	0755	edit dl rm
e2freefrag	18816	0755	edit dl rm
e2fsck	335064	0755	edit dl rm
e2image	43400	0755	edit dl rm
e2label	109112	0755	edit dl rm
e2mmpstatus	31112	0755	edit dl rm
e2scrub	7296	0755	edit dl rm
e2scrub_all	5395	0755	edit dl rm
e2undo	22912	0755	edit dl rm
e4crypt	31104	0755	edit dl rm
e4defrag	35128	0755	edit dl rm
ebtables	220488	0755	edit dl rm
ebtables-nft	220488	0755	edit dl rm
ebtables-nft-restore	220488	0755	edit dl rm
ebtables-nft-save	220488	0755	edit dl rm
ebtables-restore	220488	0755	edit dl rm
ebtables-save	220488	0755	edit dl rm
faillock	14488	0755	edit dl rm
fatlabel	55376	0755	edit dl rm
fdformat	35048	0755	edit dl rm
fdisk	153880	0755	edit dl rm
filefrag	18768	0755	edit dl rm
findfs	14568	0755	edit dl rm
fsck	55576	0755	edit dl rm
fsck.cramfs	39176	0755	edit dl rm
fsck.ext2	335064	0755	edit dl rm
fsck.ext3	335064	0755	edit dl rm
fsck.ext4	335064	0755	edit dl rm
fsck.fat	59472	0755	edit dl rm
fsck.minix	125184	0755	edit dl rm
fsck.msdos	59472	0755	edit dl rm
fsck.vfat	59472	0755	edit dl rm
fsfreeze	14568	0755	edit dl rm
fstab-decode	14648	0755	edit dl rm
fstrim	71912	0755	edit dl rm
genl	84264	0755	edit dl rm
getcap	14648	0755	edit dl rm
getpcaps	14648	0755	edit dl rm
getty	69000	0755	edit dl rm
groupadd	93136	0755	edit dl rm
groupdel	88848	0755	edit dl rm
groupmems	63736	0755	edit dl rm
groupmod	97136	0755	edit dl rm
grpck	63672	0755	edit dl rm
grpconv	59448	0755	edit dl rm
grpunconv	59448	0755	edit dl rm
halt	1119856	0755	edit dl rm
hwclock	104808	0755	edit dl rm
iconvconfig	31128	0755	edit dl rm
init	1849992	0755	edit dl rm
insmod	170352	0755	edit dl rm
installkernel	2638	0755	edit dl rm
integritysetup	61672	0755	edit dl rm
invoke-rc.d	17042	0755	edit dl rm
ip	718896	0755	edit dl rm
ip6tables	99296	0755	edit dl rm
ip6tables-apply	7057	0755	edit dl rm
ip6tables-legacy	99296	0755	edit dl rm
ip6tables-legacy-restore	99296	0755	edit dl rm
ip6tables-legacy-save	99296	0755	edit dl rm
ip6tables-nft	220488	0755	edit dl rm
ip6tables-nft-restore	220488	0755	edit dl rm
ip6tables-nft-save	220488	0755	edit dl rm
ip6tables-restore	99296	0755	edit dl rm
ip6tables-restore-translate	220488	0755	edit dl rm
ip6tables-save	99296	0755	edit dl rm
ip6tables-translate	220488	0755	edit dl rm
iptables	99296	0755	edit dl rm
iptables-apply	7057	0755	edit dl rm
iptables-legacy	99296	0755	edit dl rm
iptables-legacy-restore	99296	0755	edit dl rm
iptables-legacy-save	99296	0755	edit dl rm
iptables-nft	220488	0755	edit dl rm
iptables-nft-restore	220488	0755	edit dl rm
iptables-nft-save	220488	0755	edit dl rm
iptables-restore	99296	0755	edit dl rm
iptables-restore-translate	220488	0755	edit dl rm
iptables-save	99296	0755	edit dl rm
iptables-translate	220488	0755	edit dl rm
isosize	30952	0755	edit dl rm
killall5	27016	0755	edit dl rm
ldattach	35048	0755	edit dl rm
ldconfig	387	0755	edit dl rm
ldconfig.real	1053768	0755	edit dl rm
logsave	14496	0755	edit dl rm
losetup	112992	0755	edit dl rm
lsmod	170352	0755	edit dl rm
luksformat	3401	0755	edit dl rm
mkdosfs	35328	0755	edit dl rm
mke2fs	137848	0755	edit dl rm
mkfs	14568	0755	edit dl rm
mkfs.bfs	35048	0755	edit dl rm
mkfs.cramfs	43168	0755	edit dl rm
mkfs.ext2	137848	0755	edit dl rm
mkfs.ext3	137848	0755	edit dl rm
mkfs.ext4	137848	0755	edit dl rm
mkfs.fat	35328	0755	edit dl rm
mkfs.minix	108784	0755	edit dl rm
mkfs.msdos	35328	0755	edit dl rm
mkfs.vfat	35328	0755	edit dl rm
mkhomedir_helper	22704	0755	edit dl rm
mklost+found	14648	0755	edit dl rm
mkswap	108784	0755	edit dl rm
modinfo	170352	0755	edit dl rm
modprobe	170352	0755	edit dl rm
netplan	798	0755	edit dl rm
newusers	101168	0755	edit dl rm
nfnl_osf	18736	0755	edit dl rm
nologin	14640	0755	edit dl rm
pam-auth-update	20335	0755	edit dl rm
pam_extrausers_chkpwd	43168	2755	edit dl rm
pam_extrausers_update	43168	0755	edit dl rm
pam_getenv	2890	0755	edit dl rm
pam_tally	14504	0755	edit dl rm
pam_tally2	18600	0755	edit dl rm
pam_timestamp_check	14488	0755	edit dl rm
pivot_root	14568	0755	edit dl rm
poweroff	1119856	0755	edit dl rm
pwck	59568	0755	edit dl rm
pwconv	55344	0755	edit dl rm
pwunconv	55352	0755	edit dl rm
raw	14568	0755	edit dl rm
readprofile	22792	0755	edit dl rm
reboot	1119856	0755	edit dl rm
remove-shell	904	0755	edit dl rm
resize2fs	67968	0755	edit dl rm
rfkill	51432	0755	edit dl rm
rmmod	170352	0755	edit dl rm
rmt	59952	0755	edit dl rm
rmt-tar	59952	0755	edit dl rm
rtacct	49448	0755	edit dl rm
rtcwake	47336	0755	edit dl rm
rtmon	80120	0755	edit dl rm
runlevel	1119856	0755	edit dl rm
runuser	67816	0755	edit dl rm
service	9262	0755	edit dl rm
setcap	14648	0755	edit dl rm
sfdisk	141544	0755	edit dl rm
shadowconfig	885	0755	edit dl rm
shutdown	1119856	0755	edit dl rm
sshd	884520	0755	edit dl rm
start-stop-daemon	48456	0755	edit dl rm
sulogin	51432	0755	edit dl rm
swaplabel	18664	0755	edit dl rm
swapoff	22760	0755	edit dl rm
swapon	51432	0755	edit dl rm
switch_root	14568	0755	edit dl rm
sysctl	30960	0755	edit dl rm
tarcat	936	0755	edit dl rm
tc	542160	0755	edit dl rm
telinit	1119856	0755	edit dl rm
tipc	129264	0755	edit dl rm
tune2fs	109112	0755	edit dl rm
tzconfig	106	0755	edit dl rm
unix_chkpwd	43160	2755	edit dl rm
unix_update	43160	0755	edit dl rm
update-ca-certificates	5418	0755	edit dl rm
update-mime	9402	0755	edit dl rm
update-passwd	35392	0755	edit dl rm
update-rc.d	17161	0755	edit dl rm
useradd	147160	0755	edit dl rm
userdel	101264	0755	edit dl rm
usermod	142840	0755	edit dl rm
veritysetup	53064	0755	edit dl rm
vigr	70200	0755	edit dl rm
vipw	70200	0755	edit dl rm
visudo	223432	0755	edit dl rm
wipefs	47336	0755	edit dl rm
wpa_action	1735	0755	edit dl rm
wpa_cli	155872	0755	edit dl rm
wpa_supplicant	2901328	0755	edit dl rm
xtables-legacy-multi	99296	0755	edit dl rm
xtables-monitor	220488	0755	edit dl rm
xtables-nft-multi	220488	0755	edit dl rm
zic	63784	0755	edit dl rm
zramctl	117088	0755	edit dl rm

Edit: /snap/core20/2866/usr/sbin/update-rc.d (17161B)

#! /usr/bin/perl
# vim: ft=perl
#
# update-rc.d	Update the links in /etc/rc[0-9S].d/
#

use strict;
use warnings;
# NB: All Perl modules used here must be in perl-base. Specifically, depending
# on modules in perl-modules is not okay! See bug #716923

my $initd = "/etc/init.d";
my $etcd  = "/etc/rc";

# Print usage message and die.

sub usage {
	print STDERR "update-rc.d: error: @_\n" if ($#_ >= 0);
	print STDERR <<EOF;
usage: update-rc.d [-f] <basename> remove
       update-rc.d [-f] <basename> defaults
       update-rc.d [-f] <basename> defaults-disabled
       update-rc.d <basename> disable|enable [S|2|3|4|5]
		-f: force

The disable|enable API is not stable and might change in the future.
EOF
	exit (1);
}

exit main(@ARGV);

sub info {
    print STDOUT "update-rc.d: @_\n";
}

sub warning {
    print STDERR "update-rc.d: warning: @_\n";
}

sub error {
    print STDERR "update-rc.d: error: @_\n";
    exit (1);
}

sub error_code {
    my $rc = shift;
    print STDERR "update-rc.d: error: @_\n";
    exit ($rc);
}

sub make_path {
    my ($path) = @_;
    my @dirs = ();
    my @path = split /\//, $path;
    map { push @dirs, $_; mkdir join('/', @dirs), 0755; } @path;
}

# Given a script name, return any runlevels except 0 or 6 in which the
# script is enabled.  If that gives nothing and the script is not
# explicitly disabled, return 6 if the script is disabled in runlevel
# 0 or 6.
sub script_runlevels {
    my ($scriptname) = @_;
    my @links=<"/etc/rc[S12345].d/S[0-9][0-9]$scriptname">;
    if (@links) {
        return map(substr($_, 7, 1), @links);
    } elsif (! <"/etc/rc[S12345].d/K[0-9][0-9]$scriptname">) {
        @links=<"/etc/rc[06].d/K[0-9][0-9]$scriptname">;
        return ("6") if (@links);
    } else {
	return ;
    }
}

# Map the sysvinit runlevel to that of openrc.
sub openrc_rlconv {
    my %rl_table = (
        "S" => "sysinit",
        "1" => "recovery",
        "2" => "default",
        "3" => "default",
        "4" => "default",
        "5" => "default",
        "6" => "off" );

my %seen; # return unique runlevels
    return grep !$seen{$_}++, map($rl_table{$_}, @_);
}

sub systemd_reload {
    if (-d "/run/systemd/system") {
        system("systemctl", "daemon-reload");
    }
}

# Creates the necessary links to enable/disable a SysV init script (fallback if
# no insserv/rc-update exists)
sub make_sysv_links {
    my ($scriptname, $action) = @_;

# for "remove" we cannot rely on the init script still being present, as
    # this gets called in postrm for purging. Just remove all symlinks.
    if ("remove" eq $action) { unlink($_) for
        glob("/etc/rc?.d/[SK][0-9][0-9]$scriptname"); return; }

# if the service already has any links, do not touch them
    # numbers we don't care about, but enabled/disabled state we do
    return if glob("/etc/rc?.d/[SK][0-9][0-9]$scriptname");

# for "defaults", parse Default-{Start,Stop} and create these links
    my ($lsb_start_ref, $lsb_stop_ref) = parse_def_start_stop("/etc/init.d/$scriptname");
    my $start = $action eq "defaults-disabled" ? "K" : "S";
    foreach my $lvl (@$lsb_start_ref) {
        make_path("/etc/rc$lvl.d");
        my $l = "/etc/rc$lvl.d/${start}01$scriptname";
        symlink("../init.d/$scriptname", $l);
    }

foreach my $lvl (@$lsb_stop_ref) {
        make_path("/etc/rc$lvl.d");
        my $l = "/etc/rc$lvl.d/K01$scriptname";
        symlink("../init.d/$scriptname", $l);
    }
}

# Creates the necessary links to enable/disable the service (equivalent of an
# initscript) in systemd.
sub make_systemd_links {
    my ($scriptname, $action) = @_;

# If called by systemctl (via systemd-sysv-install), do nothing to avoid
    # an endless loop.
    if (defined($ENV{_SKIP_SYSTEMD_NATIVE}) && $ENV{_SKIP_SYSTEMD_NATIVE} == 1) {
        return;
    }

# If systemctl is available, let's use that to create the symlinks.
    if (-x "/bin/systemctl") {
        # Set this env var to avoid loop in systemd-sysv-install.
        local $ENV{SYSTEMCTL_SKIP_SYSV} = 1;
        # Use --quiet to mimic the old update-rc.d behaviour.
        system("systemctl", "--quiet", "$action", "$scriptname");
        return;
    }

# In addition to the insserv call we also enable/disable the service
    # for systemd by creating the appropriate symlink in case there is a
    # native systemd service. In case systemd is not installed we do this
    # on our own instead of using systemctl.
    my $service_path;
    if (-f "/etc/systemd/system/$scriptname.service") {
        $service_path = "/etc/systemd/system/$scriptname.service";
    } elsif (-f "/lib/systemd/system/$scriptname.service") {
        $service_path = "/lib/systemd/system/$scriptname.service";
    }
    if (defined($service_path)) {
        my $changed_sth;
        open my $fh, '<', $service_path or error("unable to read $service_path");
        while (<$fh>) {
            chomp;
            if (/^\s*WantedBy=(.+)$/i) {
                my $wants_dir = "/etc/systemd/system/$1.wants";
                my $service_link = "$wants_dir/$scriptname.service";
                if ("enable" eq $action) {
                    make_path($wants_dir);
                    symlink($service_path, $service_link);
                } else {
                    unlink($service_link) if -e $service_link;
                }
            }
        }
        close($fh);
    }
}

sub create_sequence {
    my $force = (@_);
    my $insserv = "/usr/lib/insserv/insserv";
    # Fallback for older insserv package versions [2014-04-16]
    $insserv = "/sbin/insserv" if ( -x "/sbin/insserv");
    # If insserv is not configured it is not fully installed
    my $insserv_installed = -x $insserv && -e "/etc/insserv.conf";
    my @opts;
    push(@opts, '-f') if $force;
    # Add force flag if initscripts is not installed
    # This enables inistcripts-less systems to not fail when a facility is missing
    unshift(@opts, '-f') unless is_initscripts_installed();

my $openrc_installed = -x "/sbin/openrc";

my $sysv_insserv ={};
    $sysv_insserv->{remove} = sub {
        my ($scriptname) = @_;
        if ( -f "/etc/init.d/$scriptname" ) {
            return system($insserv, @opts, "-r", $scriptname) >> 8;
        } else {
            # insserv removes all dangling symlinks, no need to tell it
            # what to look for.
            my $rc = system($insserv, @opts) >> 8;
            error_code($rc, "insserv rejected the script header") if $rc;
        }
    };
    $sysv_insserv->{defaults} = sub {
        my ($scriptname) = @_;
        if ( -f "/etc/init.d/$scriptname" ) {
            my $rc = system($insserv, @opts, $scriptname) >> 8;
            error_code($rc, "insserv rejected the script header") if $rc;
        } else {
            error("initscript does not exist: /etc/init.d/$scriptname");
        }
    };
    $sysv_insserv->{defaults_disabled} = sub {
        my ($scriptname) = @_;
        return if glob("/etc/rc?.d/[SK][0-9][0-9]$scriptname");
        if ( -f "/etc/init.d/$scriptname" ) {
            my $rc = system($insserv, @opts, $scriptname) >> 8;
            error_code($rc, "insserv rejected the script header") if $rc;
        } else {
            error("initscript does not exist: /etc/init.d/$scriptname");
        }
        sysv_toggle("disable", $scriptname);
    };
    $sysv_insserv->{toggle} = sub {
        my ($action, $scriptname) = (shift, shift);
        sysv_toggle($action, $scriptname, @_);

# Call insserv to resequence modified links
        my $rc = system($insserv, @opts, $scriptname) >> 8;
        error_code($rc, "insserv rejected the script header") if $rc;
    };

my $sysv_plain = {};
    $sysv_plain->{remove} = sub {
        my ($scriptname) = @_;
        make_sysv_links($scriptname, "remove");
    };
    $sysv_plain->{defaults} = sub {
        my ($scriptname) = @_;
        make_sysv_links($scriptname, "defaults");
    };
    $sysv_plain->{defaults_disabled} = sub {
        my ($scriptname) = @_;
        make_sysv_links($scriptname, "defaults-disabled");
    };
    $sysv_plain->{toggle} = sub {
        my ($action, $scriptname) = (shift, shift);
        sysv_toggle($action, $scriptname, @_);
    };

my $systemd = {};
    $systemd->{remove} = sub {
        systemd_reload;
    };
    $systemd->{defaults} = sub {
        systemd_reload;
    };
    $systemd->{defaults_disabled} = sub {
        systemd_reload;
    };
    $systemd->{toggle} = sub {
        my ($action, $scriptname) = (shift, shift);
        make_systemd_links($scriptname, $action);
        systemd_reload;
    };

# Should we check exit codeS?
    my $openrc = {};
    $openrc->{remove} = sub {
        my ($scriptname) = @_;
        system("rc-update", "-qqa", "delete", $scriptname);

};
    $openrc->{defaults} = sub {
        my ($scriptname) = @_;
        # OpenRC does not distinguish halt and reboot.  They are handled
        # by /etc/init.d/transit instead.
        return if ("halt" eq $scriptname || "reboot" eq $scriptname);
        # no need to consider default disabled runlevels
        # because everything is disabled by openrc by default
        my @rls=script_runlevels($scriptname);
        if ( @rls ) {
            system("rc-update", "add", $scriptname, openrc_rlconv(@rls));
        }
    };
    $openrc->{defaults_disabled} = sub {
        # In openrc everything is disabled by default
    };
    $openrc->{toggle} = sub {
        my ($action, $scriptname) = (shift, shift);
        my (@toggle_lvls, $start_lvls, $stop_lvls, @symlinks);
        my $lsb_header = lsb_header_for_script($scriptname);

# Extra arguments to disable|enable action are runlevels. If none
        # given parse LSB info for Default-Start value.
        if ($#_ >= 0) {
            @toggle_lvls = @_;
        } else {
            ($start_lvls, $stop_lvls) = parse_def_start_stop($lsb_header);
            @toggle_lvls = @$start_lvls;
            if ($#toggle_lvls < 0) {
                error("$scriptname Default-Start contains no runlevels, aborting.");
            }
        }
        my %openrc_act = ( "disable" => "del", "enable" => "add" );
        system("rc-update", $openrc_act{$action}, $scriptname,
               openrc_rlconv(@toggle_lvls))
    };

my @sequence;
    if ($insserv_installed) {
        push @sequence, $sysv_insserv;
    }
    else {
        push @sequence, $sysv_plain;
    }
    # OpenRC has to be after sysv_{insserv,plain} because it depends on them to synchronize
    # states.
    if ($openrc_installed) {
        push @sequence, $openrc;
    }
    push @sequence, $systemd;

return @sequence;
}

## Dependency based
sub main {
    my @args = @_;
    my $scriptname;
    my $action;
    my $force = 0;

while($#args >= 0 && ($_ = $args[0]) =~ /^-/) {
        shift @args;
        if (/^-f$/) { $force = 1; next }
        if (/^-h|--help$/) { usage(); }
        usage("unknown option");
    }

usage("not enough arguments") if ($#args < 1);

my @sequence = create_sequence($force);

$scriptname = shift @args;
    $action = shift @args;
    if ("remove" eq $action) {
        foreach my $init (@sequence) {
            $init->{remove}->($scriptname);
        }
    } elsif ("defaults" eq $action || "start" eq $action ||
             "stop" eq $action) {
        # All start/stop/defaults arguments are discarded so emit a
        # message if arguments have been given and are in conflict
        # with Default-Start/Default-Stop values of LSB comment.
        if ("start" eq $action || "stop" eq $action) {
            cmp_args_with_defaults($scriptname, $action, @args);
        }
        foreach my $init (@sequence) {
            $init->{defaults}->($scriptname);
        }
    } elsif ("defaults-disabled" eq $action) {
        foreach my $init (@sequence) {
            $init->{defaults_disabled}->($scriptname);
        }
    } elsif ("disable" eq $action || "enable" eq $action) {
        foreach my $init (@sequence) {
            $init->{toggle}->($action, $scriptname, @args);
        }
    } else {
        usage();
    }
}

sub parse_def_start_stop {
    my $script = shift;
    my (%lsb, @def_start_lvls, @def_stop_lvls);

open my $fh, '<', $script or error("unable to read $script");
    while (<$fh>) {
        chomp;
        if (m/^### BEGIN INIT INFO\s*$/) {
            $lsb{'begin'}++;
        }
        elsif (m/^### END INIT INFO\s*$/) {
            $lsb{'end'}++;
            last;
        }
        elsif ($lsb{'begin'} and not $lsb{'end'}) {
            if (m/^# Default-Start:\s*(\S?.*)$/) {
                @def_start_lvls = split(' ', $1);
            }
            if (m/^# Default-Stop:\s*(\S?.*)$/) {
                @def_stop_lvls = split(' ', $1);
            }
        }
    }
    close($fh);

return (\@def_start_lvls, \@def_stop_lvls);
}

sub lsb_header_for_script {
    my $name = shift;

foreach my $file ("/etc/insserv/overrides/$name", "/etc/init.d/$name",
                      "/usr/share/insserv/overrides/$name") {
        return $file if -s $file;
    }

error("cannot find a LSB script for $name");
}

sub cmp_args_with_defaults {
    my ($name, $act) = (shift, shift);
    my ($lsb_start_ref, $lsb_stop_ref, $arg_str, $lsb_str);
    my (@arg_start_lvls, @arg_stop_lvls, @lsb_start_lvls, @lsb_stop_lvls);

($lsb_start_ref, $lsb_stop_ref) = parse_def_start_stop("/etc/init.d/$name");
    @lsb_start_lvls = @$lsb_start_ref;
    @lsb_stop_lvls  = @$lsb_stop_ref;
    return if (!@lsb_start_lvls and !@lsb_stop_lvls);

warning "start and stop actions are no longer supported; falling back to defaults";
    my $start = $act eq 'start' ? 1 : 0;
    my $stop = $act eq 'stop' ? 1 : 0;

# The legacy part of this program passes arguments starting with
    # "start|stop NN x y z ." but the insserv part gives argument list
    # starting with sequence number (ie. strips off leading "start|stop")
    # Start processing arguments immediately after the first seq number.
    my $argi = $_[0] eq $act ? 2 : 1;

while (defined $_[$argi]) {
        my $arg = $_[$argi];

# Runlevels 0 and 6 are always stop runlevels
        if ($arg eq 0 or $arg eq 6) {
            $start = 0; $stop = 1;
        } elsif ($arg eq 'start') {
            $start = 1; $stop = 0; $argi++; next;
        } elsif ($arg eq 'stop') {
            $start = 0; $stop = 1; $argi++; next;
        } elsif ($arg eq '.') {
            next;
        }
        push(@arg_start_lvls, $arg) if $start;
        push(@arg_stop_lvls, $arg) if $stop;
    } continue {
        $argi++;
    }

if ($#arg_start_lvls != $#lsb_start_lvls or
        join("\0", sort @arg_start_lvls) ne join("\0", sort @lsb_start_lvls)) {
        $arg_str = @arg_start_lvls ? "@arg_start_lvls" : "none";
        $lsb_str = @lsb_start_lvls ? "@lsb_start_lvls" : "none";
        warning "start runlevel arguments ($arg_str) do not match",
                "$name Default-Start values ($lsb_str)";
    }
    if ($#arg_stop_lvls != $#lsb_stop_lvls or
        join("\0", sort @arg_stop_lvls) ne join("\0", sort @lsb_stop_lvls)) {
        $arg_str = @arg_stop_lvls ? "@arg_stop_lvls" : "none";
        $lsb_str = @lsb_stop_lvls ? "@lsb_stop_lvls" : "none";
        warning "stop runlevel arguments ($arg_str) do not match",
                "$name Default-Stop values ($lsb_str)";
    }
}

sub sysv_toggle {
    my ($act, $name) = (shift, shift);
    my (@toggle_lvls, $start_lvls, $stop_lvls, @symlinks);
    my $lsb_header = lsb_header_for_script($name);

# Find symlinks in rc.d directories. Refuse to modify links in runlevels
    # not used for normal system start sequence.
    for my $lvl (@toggle_lvls) {
        if ($lvl !~ /^[S2345]$/) {
            warning("$act action will have no effect on runlevel $lvl");
            next;
        }
        push(@symlinks, $_) for glob("/etc/rc$lvl.d/[SK][0-9][0-9]$name");
    }

if (!@symlinks) {
        error("no runlevel symlinks to modify, aborting!");
    }

# Toggle S/K bit of script symlink.
    for my $cur_lnk (@symlinks) {
        my $sk;
        my @new_lnk = split(//, $cur_lnk);

if ("disable" eq $act) {
            $sk = rindex($cur_lnk, '/S') + 1;
            next if $sk < 1;
            $new_lnk[$sk] = 'K';
        } else {
            $sk = rindex($cur_lnk, '/K') + 1;
            next if $sk < 1;
            $new_lnk[$sk] = 'S';
        }

rename($cur_lnk, join('', @new_lnk)) or error($!);
    }
}

# Try to determine if initscripts is installed
sub is_initscripts_installed {
    # Check if mountkernfs is available. We cannot make inferences
    # using the running init system because we may be running in a
    # chroot
    return  glob('/etc/rcS.d/S??mountkernfs.sh');
}

cmd: