FM / sbin

/snap/core18/2979/usr/sbin

Name	Size	Mode	Actions
aa-remove-unknown	2923	0755	edit dl rm
aa-status	8610	0755	edit dl rm
add-shell	860	0755	edit dl rm
addgroup	37322	0755	edit dl rm
adduser	37322	0755	edit dl rm
apparmor_status	8610	0755	edit dl rm
arpd	55328	0755	edit dl rm
chgpasswd	59216	0755	edit dl rm
chmem	43088	0755	edit dl rm
chpasswd	55152	0755	edit dl rm
chroot	39096	0755	edit dl rm
cpgr	57304	0755	edit dl rm
cppw	57304	0755	edit dl rm
delgroup	16495	0755	edit dl rm
deluser	16495	0755	edit dl rm
e2freefrag	14408	0755	edit dl rm
e4crypt	22600	0755	edit dl rm
e4defrag	26616	0755	edit dl rm
faillock	14328	0755	edit dl rm
fdformat	30800	0755	edit dl rm
filefrag	14352	0755	edit dl rm
genl	59448	0755	edit dl rm
groupadd	63408	0755	edit dl rm
groupdel	72056	0755	edit dl rm
groupmems	59256	0755	edit dl rm
groupmod	69816	0755	edit dl rm
grpck	55096	0755	edit dl rm
grpconv	50872	0755	edit dl rm
grpunconv	50872	0755	edit dl rm
iconvconfig	30976	0755	edit dl rm
invoke-rc.d	16031	0755	edit dl rm
ip6tables-apply	7016	0755	edit dl rm
iptables-apply	7016	0755	edit dl rm
ldattach	30800	0755	edit dl rm
mklost+found	10232	0755	edit dl rm
netplan	798	0755	edit dl rm
newusers	84368	0755	edit dl rm
nfnl_osf	14328	0755	edit dl rm
nologin	6136	0755	edit dl rm
pam-auth-update	19850	0755	edit dl rm
pam_getenv	2890	0755	edit dl rm
pam_timestamp_check	10232	0755	edit dl rm
pwck	50992	0755	edit dl rm
pwconv	46800	0755	edit dl rm
pwunconv	46776	0755	edit dl rm
readprofile	18544	0755	edit dl rm
remove-shell	904	0755	edit dl rm
rfkill	47184	0755	edit dl rm
rmt	59792	0755	edit dl rm
rmt-tar	59792	0755	edit dl rm
rtcwake	43088	0755	edit dl rm
service	9262	0755	edit dl rm
sshd	790952	0755	edit dl rm
tarcat	936	0755	edit dl rm
tzconfig	106	0755	edit dl rm
update-ca-certificates	5394	0755	edit dl rm
update-mime	9053	0755	edit dl rm
update-passwd	31136	0755	edit dl rm
update-rc.d	16508	0755	edit dl rm
useradd	126240	0755	edit dl rm
userdel	84464	0755	edit dl rm
usermod	126016	0755	edit dl rm
vigr	61624	0755	edit dl rm
vipw	61624	0755	edit dl rm
visudo	213816	0755	edit dl rm
zic	55440	0755	edit dl rm

Edit: /snap/core18/2979/usr/sbin/update-rc.d (16508B)

#! /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) = @_;

# 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. We need to do this on our own instead of
    # using systemctl because systemd might not even be installed yet.
    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 ($openrc_installed) {
        push @sequence, $openrc;
    }
    if ($insserv_installed) {
        push @sequence, $sysv_insserv;
    }
    else {
        push @sequence, $sysv_plain;
    }
    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: