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/dhclient-script (16304B)

#!/bin/sh

# Explicitly set the PATH to that of ENV_SUPATH in /etc/login.defs and unset
# various other variables. We need to do this so /sbin/dhclient cannot abuse
# the environment to escape AppArmor confinement via this script
# (LP: #1045986). This can be removed once AppArmor supports environment
# filtering (LP: #1045985)
export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
export ENV=
export BASH_ENV=
export CDPATH=
export GLOBIGNORE=
export BASH_XTRACEFD=

# dhclient-script for Linux. Dan Halbert, March, 1997.
# Updated for Linux 2.[12] by Brian J. Murrell, January 1999.
# Modified for Debian.  Matt Zimmerman and Eloy Paris, December 2003
# Modified to remove useless tests for antiquated kernel versions that
# this doesn't even work with anyway, and introduces a dependency on /usr
# being mounted, which causes cosmetic errors on hosts that NFS mount /usr
# Andrew Pollock, February 2005
# Modified to work on point-to-point links. Andrew Pollock, June 2005
# Modified to support passing the parameters called with to the hooks. Andrew Pollock, November 2005

# The alias handling in here probably still sucks. -mdz

# log an error.
error() { logger -p daemon.err "$@"; }

# wait for given file to be writable
wait_for_rw() {
    local file=$1
    # Find out whether we are going to mount / rw
    exec 9>&0 </etc/fstab
    rootmode=rw
    while read dev mnt type opts dump pass junk; do
        [ "$mnt" != / ] && continue
        case "$opts" in
            ro|ro,*|*,ro|*,ro,*)
               rootmode=ro
               ;;
             esac
     done
     exec 0>&9 9>&-

# Wait for $file to become writable
    if [ "$rootmode" = "rw" ]; then
        while ! { : >> "$file"; } 2>/dev/null; do
            sleep 0.1
        done
    fi
}

# update /etc/resolv.conf based on received values
make_resolv_conf() {
    local new_resolv_conf

# DHCPv4
    if [ -n "$new_domain_search" ] || [ -n "$new_domain_name" ] ||
       [ -n "$new_domain_name_servers" ]; then
        resolv_conf=$(readlink -f "/etc/resolv.conf" 2>/dev/null) ||
            resolv_conf="/etc/resolv.conf"

new_resolv_conf="${resolv_conf}.dhclient-new.$$"
        wait_for_rw "$new_resolv_conf"
        rm -f $new_resolv_conf

if [ -n "$new_domain_name" ]; then
            echo domain ${new_domain_name%% *} >>$new_resolv_conf
        fi

if [ -n "$new_domain_search" ]; then
            if [ -n "$new_domain_name" ]; then
                domain_in_search_list=""
                for domain in $new_domain_search; do
                    if [ "$domain" = "${new_domain_name}" ] ||
                       [ "$domain" = "${new_domain_name}." ]; then
                        domain_in_search_list="Yes"
                    fi
                done
                if [ -z "$domain_in_search_list" ]; then
                    new_domain_search="$new_domain_name $new_domain_search"
                fi
            fi
            echo "search ${new_domain_search}" >> $new_resolv_conf
        elif [ -n "$new_domain_name" ]; then
            echo "search ${new_domain_name}" >> $new_resolv_conf
        fi

if [ -n "$new_domain_name_servers" ]; then
            for nameserver in $new_domain_name_servers; do
                echo nameserver $nameserver >>$new_resolv_conf
            done
        else # keep 'old' nameservers
            sed -n /^\w*[Nn][Aa][Mm][Ee][Ss][Ee][Rr][Vv][Ee][Rr]/p $resolv_conf >>$new_resolv_conf
        fi

if [ -f $resolv_conf ]; then
	    chown --reference=$resolv_conf $new_resolv_conf
	    chmod --reference=$resolv_conf $new_resolv_conf
	fi
        mv -f $new_resolv_conf $resolv_conf
    # DHCPv6
    elif [ -n "$new_dhcp6_domain_search" ] || [ -n "$new_dhcp6_name_servers" ]; then
        resolv_conf=$(readlink -f "/etc/resolv.conf" 2>/dev/null) ||
            resolv_conf="/etc/resolv.conf"

new_resolv_conf="${resolv_conf}.dhclient-new.$$"
        wait_for_rw "$new_resolv_conf"
        rm -f $new_resolv_conf

if [ -n "$new_dhcp6_domain_search" ]; then
            echo "search ${new_dhcp6_domain_search}" >> $new_resolv_conf
        fi

if [ -n "$new_dhcp6_name_servers" ]; then
            for nameserver in $new_dhcp6_name_servers; do
                # append %interface to link-local-address nameservers
                if [ "${nameserver##fe80::}" != "$nameserver" ] ||
                   [ "${nameserver##FE80::}" != "$nameserver" ]; then
                    nameserver="${nameserver}%${interface}"
                fi
                echo nameserver $nameserver >>$new_resolv_conf
            done
        else # keep 'old' nameservers
            sed -n /^\w*[Nn][Aa][Mm][Ee][Ss][Ee][Rr][Vv][Ee][Rr]/p $resolv_conf >>$new_resolv_conf
        fi

if [ -f $resolv_conf ]; then
            chown --reference=$resolv_conf $new_resolv_conf
            chmod --reference=$resolv_conf $new_resolv_conf
	fi
        mv -f $new_resolv_conf $resolv_conf
    fi
}

# set host name
set_hostname() {
    if [ -n "$new_host_name" ]; then
        local current_hostname=$(hostname)

# current host name is empty, '(none)' or 'localhost' or differs from new one from DHCP
        if [ -z "$current_hostname" ] ||
           [ "$current_hostname" = '(none)' ] ||
           [ "$current_hostname" = 'localhost' ] ||
           [ "$current_hostname" = "$old_host_name" ]; then
           if [ "$new_host_name" != "$current_host_name" ]; then
               hostname "$new_host_name"
           fi
        fi
    fi
}

# set the link up and wait for ipv6 link local dad to finish
ipv6_link_up_and_dad() {
    local dev=$1 delay=${2:-0.1} attempts=${3:-60}
    ip link set up dev "$dev" ||
        { error "$dev: failed to set link up"; return 1; }
    local n=0
    while :; do
        n=$((n+1))
        # note: busybox ip does not understand 'tentative' as input
        # so we cannot just use the tentative flag and check for empty
        out=$(ip -6 -o address show dev "$dev" scope link) || {
            error "$dev: checking for link-local addresses failed";
            return 1
        }
        # another note: the output may be empty if the link local tentative addr
        # isn't up just yet, so we need to make sure there is at least one 'inet6'
        # match before returning success.  We need to keep checking for both
        # 'tentative' case and default (no inet6 address) case. (LP: #1718568)
        # Don't reorder tentative/inet6 - we need to check for tentative first.
        case " $out " in
            *\ dadfailed\ *)
                error "$dev: ipv6 dad failed."
                return 1;;
            *\ tentative\ *) :;;
            *\ inet6\ *) return 0;;
            *) :;;
        esac
        [ $n -lt $attempts ] || {
            error "$dev: time out waiting for permanent link-local address"
            return 1;
        }
        sleep $delay
    done
}

# run given script
run_hook() {
    local script="$1"
    local exit_status=0

if [ -f $script ]; then
        . $script
        exit_status=$?
    fi

if [ -n "$exit_status" ] && [ "$exit_status" -ne 0 ]; then
        logger -p daemon.err "$script returned non-zero exit status $exit_status"
    fi

return $exit_status
}

# run scripts in given directory
run_hookdir() {
    local dir="$1"
    local exit_status=0

if [ -d "$dir" ]; then
        for script in $(run-parts --list $dir); do
            run_hook $script
            exit_status=$((exit_status|$?))
        done
    fi

return $exit_status
}

# Must be used on exit.   Invokes the local dhcp client exit hooks, if any.
exit_with_hooks() {
    local exit_status=$1

# Source the documented exit-hook script, if it exists
    if ! run_hook /etc/dhcp/dhclient-exit-hooks; then
        exit_status=$?
    fi

# Now run scripts in the Debian-specific directory.
    if ! run_hookdir /etc/dhcp/dhclient-exit-hooks.d; then
        exit_status=$?
    fi

exit $exit_status
}

# The 576 MTU is only used for X.25 and dialup connections
# where the admin wants low latency.  Such a low MTU can cause
# problems with UDP traffic, among other things.  As such,
# disallow MTUs from 576 and below by default, so that broken
# MTUs are ignored, but higher stuff is allowed (1492, 1500, etc).
if [ -z "$new_interface_mtu" ] || [ "$new_interface_mtu" -le 576 ]; then
    new_interface_mtu=''
fi

# The action starts here

# Invoke the local dhcp client enter hooks, if they exist.
run_hook /etc/dhcp/dhclient-enter-hooks
run_hookdir /etc/dhcp/dhclient-enter-hooks.d

# Execute the operation
case "$reason" in

### DHCPv4 Handlers

MEDIUM|ARPCHECK|ARPSEND)
        # Do nothing
        ;;
    PREINIT)
        # The DHCP client is requesting that an interface be
        # configured as required in order to send packets prior to
        # receiving an actual address. - dhclient-script(8)

# ensure interface is up
        ip link set dev ${interface} up

if [ -n "$alias_ip_address" ]; then
            # flush alias IP from interface
            ip -4 addr flush dev ${interface} label ${interface}:0
        fi

;;

BOUND|RENEW|REBIND|REBOOT)
        set_hostname

if [ -n "$old_ip_address" ] && [ -n "$alias_ip_address" ] &&
           [ "$alias_ip_address" != "$old_ip_address" ]; then
            # alias IP may have changed => flush it
            ip -4 addr flush dev ${interface} label ${interface}:0
        fi

if [ -n "$old_ip_address" ] &&
           [ "$old_ip_address" != "$new_ip_address" ]; then
            # leased IP has changed => flush it
            ip -4 addr flush dev ${interface} label ${interface}
        fi

if [ -z "$old_ip_address" ] ||
           [ "$old_ip_address" != "$new_ip_address" ] ||
           [ "$reason" = "BOUND" ] || [ "$reason" = "REBOOT" ]; then
            # new IP has been leased or leased IP changed => set it
            ip -4 addr add ${new_ip_address}${new_subnet_mask:+/$new_subnet_mask} \
                ${new_broadcast_address:+broadcast $new_broadcast_address} \
                ${new_dhcp_lease_time:+valid_lft $new_dhcp_lease_time} \
                ${new_dhcp_lease_time:+preferred_lft $new_dhcp_lease_time} \
                dev ${interface} label ${interface}

if [ -n "$new_interface_mtu" ]; then
                # set MTU
                ip link set dev ${interface} mtu ${new_interface_mtu}
            fi

# if we have $new_rfc3442_classless_static_routes then we have to
	    # ignore $new_routers entirely
	    if [ ! "$new_rfc3442_classless_static_routes" ]; then
		    # set if_metric if IF_METRIC is set or there's more than one router
		    if_metric="$IF_METRIC"
		    if [ "${new_routers%% *}" != "${new_routers}" ]; then
			if_metric=${if_metric:-1}
		    fi

for router in $new_routers; do
			if [ "$new_subnet_mask" = "255.255.255.255" ]; then
			    # point-to-point connection => set explicit route
			    ip -4 route add ${router} dev $interface >/dev/null 2>&1
			fi

# set default route
			ip -4 route add default via ${router} dev ${interface} \
			    ${if_metric:+metric $if_metric} >/dev/null 2>&1

if [ -n "$if_metric" ]; then
			    if_metric=$((if_metric+1))
			fi
		    done
	    fi
        else # RENEW||REBIND
            ip -4 addr change ${new_ip_address}${new_subnet_mask:+/$new_subnet_mask} \
                ${new_broadcast_address:+broadcast $new_broadcast_address} \
                ${new_dhcp_lease_time:+valid_lft $new_dhcp_lease_time} \
                ${new_dhcp_lease_time:+preferred_lft $new_dhcp_lease_time} \
                dev ${interface} label ${interface}
        fi

if [ -n "$alias_ip_address" ] &&
           [ "$new_ip_address" != "$alias_ip_address" ]; then
            # separate alias IP given, which may have changed
            # => flush it, set it & add host route to it
            ip -4 addr flush dev ${interface} label ${interface}:0
            ip -4 addr add ${alias_ip_address}${alias_subnet_mask:+/$alias_subnet_mask} \
                dev ${interface} label ${interface}:0
            ip -4 route add ${alias_ip_address} dev ${interface} >/dev/null 2>&1
        fi

# update /etc/resolv.conf
        make_resolv_conf

;;

EXPIRE|FAIL|RELEASE|STOP)
        if [ -n "$alias_ip_address" ]; then
            # flush alias IP
            ip -4 addr flush dev ${interface} label ${interface}:0
        fi

if [ -n "$old_ip_address" ]; then
            # flush leased IP
            ip -4 addr flush dev ${interface} label ${interface}
        fi

if [ -n "$alias_ip_address" ]; then
            # alias IP given => set it & add host route to it
            ip -4 addr add ${alias_ip_address}${alias_subnet_mask:+/$alias_subnet_mask} \
                dev ${interface} label ${interface}:0
            ip -4 route add ${alias_ip_address} dev ${interface} >/dev/null 2>&1
        fi

;;

TIMEOUT)
        if [ -n "$alias_ip_address" ]; then
            # flush alias IP
            ip -4 addr flush dev ${interface} label ${interface}:0
        fi

# set IP from recorded lease
        ip -4 addr add ${new_ip_address}${new_subnet_mask:+/$new_subnet_mask} \
            ${new_broadcast_address:+broadcast $new_broadcast_address} \
            ${new_dhcp_lease_time:+valid_lft $new_dhcp_lease_time} \
            ${new_dhcp_lease_time:+preferred_lft $new_dhcp_lease_time} \
            dev ${interface} label ${interface}

if [ -n "$new_interface_mtu" ]; then
            # set MTU
            ip link set dev ${interface} mtu ${new_interface_mtu}
        fi

# if there is no router recorded in the lease or the 1st router answers pings
        if [ -z "$new_routers" ] || ping -q -c 1 "${new_routers%% *}"; then
	    # if we have $new_rfc3442_classless_static_routes then we have to
	    # ignore $new_routers entirely
	    if [ ! "$new_rfc3442_classless_static_routes" ]; then
		    if [ -n "$alias_ip_address" ] &&
		       [ "$new_ip_address" != "$alias_ip_address" ]; then
			# separate alias IP given => set up the alias IP & add host route to it
			ip -4 addr add ${alias_ip_address}${alias_subnet_mask:+/$alias_subnet_mask} \
			    dev ${interface} label ${interface}:0
			ip -4 route add ${alias_ip_address} dev ${interface} >/dev/null 2>&1
		    fi

# set if_metric if IF_METRIC is set or there's more than one router
		    if_metric="$IF_METRIC"
		    if [ "${new_routers%% *}" != "${new_routers}" ]; then
			if_metric=${if_metric:-1}
		    fi

# set default route
		    for router in $new_routers; do
			ip -4 route add default via ${router} dev ${interface} \
			    ${if_metric:+metric $if_metric} >/dev/null 2>&1

if [ -n "$if_metric" ]; then
			    if_metric=$((if_metric+1))
			fi
		    done
	    fi

# update /etc/resolv.conf
            make_resolv_conf
        else
            # flush all IPs from interface
            ip -4 addr flush dev ${interface}
            exit_with_hooks 2
        fi

;;

### DHCPv6 Handlers
    # TODO handle prefix change: ?based on ${old_ip6_prefix} and ${new_ip6_prefix}?

PREINIT6)
        # ensure interface is up
        ipv6_link_up_and_dad "$interface"

# flush any stale global permanent IPs from interface
        ip -6 addr flush dev ${interface} scope global permanent

;;

BOUND6|RENEW6|REBIND6)
        if [ "${new_ip6_address}" ]; then
            # set leased IP
            ip -6 addr add ${new_ip6_address} \
                dev ${interface} scope global
        fi

# update /etc/resolv.conf
        if [ "${reason}" = BOUND6 ] ||
           [ "${new_dhcp6_name_servers}" != "${old_dhcp6_name_servers}" ] ||
           [ "${new_dhcp6_domain_search}" != "${old_dhcp6_domain_search}" ]; then
            make_resolv_conf
        fi

;;

DEPREF6)
        # set preferred lifetime of leased IP to 0
        ip -6 addr change ${cur_ip6_address} \
            dev ${interface} scope global preferred_lft 0

;;

EXPIRE6|RELEASE6|STOP6)
        if [ -z "${old_ip6_address}" ]; then
            exit_with_hooks 2
        fi

# delete leased IP
        ip -6 addr del ${old_ip6_address} \
            dev ${interface}

;;
esac

exit_with_hooks 0

cmd: