FM / sbin

/snap/core22/2437/usr/sbin

Name	Size	Mode	Actions
aa-remove-unknown	3068	0755	edit dl rm
aa-status	64120	0755	edit dl rm
aa-teardown	137	0755	edit dl rm
add-shell	1051	0755	edit dl rm
addgroup	38247	0755	edit dl rm
adduser	38247	0755	edit dl rm
agetty	56896	0755	edit dl rm
apparmor_parser	1548064	0755	edit dl rm
apparmor_status	64120	0755	edit dl rm
arpd	26960	0755	edit dl rm
arptables	224296	0755	edit dl rm
arptables-nft	224296	0755	edit dl rm
arptables-nft-restore	224296	0755	edit dl rm
arptables-nft-save	224296	0755	edit dl rm
arptables-restore	224296	0755	edit dl rm
arptables-save	224296	0755	edit dl rm
badblocks	35144	0755	edit dl rm
blkdeactivate	16351	0755	edit dl rm
blkdiscard	22912	0755	edit dl rm
blkid	51624	0755	edit dl rm
blkzone	35200	0755	edit dl rm
blockdev	31104	0755	edit dl rm
bridge	94712	0755	edit dl rm
capsh	31032	0755	edit dl rm
cfdisk	97008	0755	edit dl rm
chcpu	31104	0755	edit dl rm
chgpasswd	59528	0755	edit dl rm
chmem	35200	0755	edit dl rm
chpasswd	55464	0755	edit dl rm
chroot	39432	0755	edit dl rm
cpgr	49448	0755	edit dl rm
cppw	49448	0755	edit dl rm
cryptdisks_start	1544	0755	edit dl rm
cryptdisks_stop	844	0755	edit dl rm
cryptsetup	174000	0755	edit dl rm
cryptsetup-reencrypt	92544	0755	edit dl rm
cryptsetup-ssh	24096	0755	edit dl rm
ctrlaltdel	14720	0755	edit dl rm
dcb	82448	0755	edit dl rm
debugfs	235320	0755	edit dl rm
delgroup	16495	0755	edit dl rm
deluser	16495	0755	edit dl rm
depmod	170352	0755	edit dl rm
devlink	146288	0755	edit dl rm
dhclient	453280	0755	edit dl rm
dhclient-script	16304	0755	edit dl rm
dmsetup	175128	0755	edit dl rm
dmstats	175128	0755	edit dl rm
dosfsck	84360	0755	edit dl rm
dosfslabel	39304	0755	edit dl rm
dumpe2fs	31040	0755	edit dl rm
e2freefrag	14648	0755	edit dl rm
e2fsck	360280	0755	edit dl rm
e2image	43328	0755	edit dl rm
e2label	105016	0755	edit dl rm
e2mmpstatus	31040	0755	edit dl rm
e2scrub	7296	0755	edit dl rm
e2scrub_all	5395	0755	edit dl rm
e2undo	22840	0755	edit dl rm
e4crypt	31104	0755	edit dl rm
e4defrag	31032	0755	edit dl rm
ebtables	224296	0755	edit dl rm
ebtables-nft	224296	0755	edit dl rm
ebtables-nft-restore	224296	0755	edit dl rm
ebtables-nft-save	224296	0755	edit dl rm
ebtables-restore	224296	0755	edit dl rm
ebtables-save	224296	0755	edit dl rm
faillock	14488	0755	edit dl rm
fatlabel	39304	0755	edit dl rm
fdisk	113072	0755	edit dl rm
filefrag	18760	0755	edit dl rm
findfs	14720	0755	edit dl rm
fsck	43440	0755	edit dl rm
fsck.cramfs	31168	0755	edit dl rm
fsck.ext2	360280	0755	edit dl rm
fsck.ext3	360280	0755	edit dl rm
fsck.ext4	360280	0755	edit dl rm
fsck.fat	84360	0755	edit dl rm
fsck.minix	55712	0755	edit dl rm
fsck.msdos	84360	0755	edit dl rm
fsck.vfat	84360	0755	edit dl rm
fsfreeze	14720	0755	edit dl rm
fstab-decode	18744	0755	edit dl rm
fstrim	43392	0755	edit dl rm
genl	92608	0755	edit dl rm
getcap	14648	0755	edit dl rm
getpcaps	14648	0755	edit dl rm
getty	56896	0755	edit dl rm
groupadd	68520	0755	edit dl rm
groupdel	64232	0755	edit dl rm
groupmems	55488	0755	edit dl rm
groupmod	68424	0755	edit dl rm
grpck	59528	0755	edit dl rm
grpconv	51208	0755	edit dl rm
grpunconv	51208	0755	edit dl rm
halt	1119856	0755	edit dl rm
hwclock	51712	0755	edit dl rm
iconvconfig	31128	0755	edit dl rm
init	1849992	0755	edit dl rm
insmod	170352	0755	edit dl rm
installkernel	2659	0755	edit dl rm
integritysetup	55368	0755	edit dl rm
invoke-rc.d	16507	0755	edit dl rm
ip	718896	0755	edit dl rm
ip6tables	224296	0755	edit dl rm
ip6tables-apply	7057	0755	edit dl rm
ip6tables-legacy	99272	0755	edit dl rm
ip6tables-legacy-restore	99272	0755	edit dl rm
ip6tables-legacy-save	99272	0755	edit dl rm
ip6tables-nft	224296	0755	edit dl rm
ip6tables-nft-restore	224296	0755	edit dl rm
ip6tables-nft-save	224296	0755	edit dl rm
ip6tables-restore	224296	0755	edit dl rm
ip6tables-restore-translate	224296	0755	edit dl rm
ip6tables-save	224296	0755	edit dl rm
ip6tables-translate	224296	0755	edit dl rm
iptables	224296	0755	edit dl rm
iptables-apply	7057	0755	edit dl rm
iptables-legacy	99272	0755	edit dl rm
iptables-legacy-restore	99272	0755	edit dl rm
iptables-legacy-save	99272	0755	edit dl rm
iptables-nft	224296	0755	edit dl rm
iptables-nft-restore	224296	0755	edit dl rm
iptables-nft-save	224296	0755	edit dl rm
iptables-restore	224296	0755	edit dl rm
iptables-restore-translate	224296	0755	edit dl rm
iptables-save	224296	0755	edit dl rm
iptables-translate	224296	0755	edit dl rm
isosize	14720	0755	edit dl rm
killall5	31112	0755	edit dl rm
ldattach	27008	0755	edit dl rm
ldconfig	387	0755	edit dl rm
ldconfig.real	1213960	0755	edit dl rm
logsave	14496	0755	edit dl rm
losetup	72208	0755	edit dl rm
lsmod	170352	0755	edit dl rm
luksformat	3401	0755	edit dl rm
mkdosfs	52048	0755	edit dl rm
mke2fs	133752	0755	edit dl rm
mkfs	14720	0755	edit dl rm
mkfs.bfs	22912	0755	edit dl rm
mkfs.cramfs	35144	0755	edit dl rm
mkfs.ext2	133752	0755	edit dl rm
mkfs.ext3	133752	0755	edit dl rm
mkfs.ext4	133752	0755	edit dl rm
mkfs.fat	52048	0755	edit dl rm
mkfs.minix	43408	0755	edit dl rm
mkfs.msdos	52048	0755	edit dl rm
mkfs.vfat	52048	0755	edit dl rm
mkhomedir_helper	22704	0755	edit dl rm
mklost+found	14648	0755	edit dl rm
mkswap	47496	0755	edit dl rm
modinfo	170352	0755	edit dl rm
modprobe	170352	0755	edit dl rm
netplan	798	0755	edit dl rm
newusers	76520	0755	edit dl rm
nfnl_osf	18736	0755	edit dl rm
nologin	14640	0755	edit dl rm
pam-auth-update	20992	0755	edit dl rm
pam_extrausers_chkpwd	22680	2755	edit dl rm
pam_extrausers_update	30872	0755	edit dl rm
pam_getenv	2890	0755	edit dl rm
pam_timestamp_check	14488	0755	edit dl rm
pivot_root	14720	0755	edit dl rm
plymouthd	154168	0755	edit dl rm
poweroff	1119856	0755	edit dl rm
pwck	51336	0755	edit dl rm
pwconv	47112	0755	edit dl rm
pwunconv	43016	0755	edit dl rm
readprofile	22944	0755	edit dl rm
reboot	1119856	0755	edit dl rm
remove-shell	1099	0755	edit dl rm
resize2fs	67896	0755	edit dl rm
rfkill	30952	0755	edit dl rm
rmmod	170352	0755	edit dl rm
rmt	59976	0755	edit dl rm
rmt-tar	59976	0755	edit dl rm
rtacct	28992	0755	edit dl rm
rtcwake	35200	0755	edit dl rm
rtmon	92560	0755	edit dl rm
runlevel	1119856	0755	edit dl rm
runuser	55680	0755	edit dl rm
service	9097	0755	edit dl rm
setcap	14648	0755	edit dl rm
sfdisk	104832	0755	edit dl rm
shadowconfig	885	0755	edit dl rm
shutdown	1119856	0755	edit dl rm
sshd	921288	0755	edit dl rm
start-stop-daemon	48488	0755	edit dl rm
sudo_logsrvd	204904	0755	edit dl rm
sudo_sendlog	109912	0755	edit dl rm
sulogin	43392	0755	edit dl rm
swaplabel	18816	0755	edit dl rm
swapoff	22912	0755	edit dl rm
swapon	43392	0755	edit dl rm
switch_root	22912	0755	edit dl rm
sysctl	30960	0755	edit dl rm
tarcat	936	0755	edit dl rm
tc	628816	0755	edit dl rm
telinit	1119856	0755	edit dl rm
tipc	92608	0755	edit dl rm
tune2fs	105016	0755	edit dl rm
tzconfig	106	0755	edit dl rm
unix_chkpwd	26776	2755	edit dl rm
unix_update	30872	0755	edit dl rm
update-ca-certificates	5418	0755	edit dl rm
update-passwd	35392	0755	edit dl rm
update-rc.d	17324	0755	edit dl rm
update-shells	3806	0755	edit dl rm
useradd	130720	0755	edit dl rm
userdel	88936	0755	edit dl rm
usermod	126424	0755	edit dl rm
vdpa	31296	0755	edit dl rm
veritysetup	44808	0755	edit dl rm
vigr	57888	0755	edit dl rm
vipw	57888	0755	edit dl rm
visudo	225064	0755	edit dl rm
wipefs	39296	0755	edit dl rm
wpa_action	1735	0755	edit dl rm
wpa_cli	143680	0755	edit dl rm
wpa_supplicant	3397048	0755	edit dl rm
xtables-legacy-multi	99272	0755	edit dl rm
xtables-monitor	224296	0755	edit dl rm
xtables-nft-multi	224296	0755	edit dl rm
zic	63816	0755	edit dl rm
zramctl	55824	0755	edit dl rm

Edit: /snap/core22/2437/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: