/etc/dhcp3/dhclient-enter-hooks.d/resolvconf is in openresolv 3.5.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 | # resolvconf support for dhclient3
NL="
"
if [ -x /sbin/resolvconf ]; then
case "$reason" in
BOUND|RENEW|REBIND|REBOOT|TIMEOUT)
make_resolv_conf() {
local nameserver conf=
if [ -n "$new_domain_name" ]; then
conf="${conf}domain $new_domain_name$NL"
fi
if [ -n "$new_domain_search" ]; then
conf="${conf}search $new_domain_search$NL"
fi
for nameserver in $new_domain_name_servers; do
conf="${conf}nameserver $nameserver$NL"
done
if [ -n "$conf" -a -n "$interface" ]; then
conf="# resolv.conf for $interface$NL$conf"
printf %s "$conf" | \
/sbin/resolvconf -a "$interface"
fi
}
;;
BOUND6|RENEW6|REBIND6)
make_resolv_conf() {
local nameserver conf=
if [ -n "$new_dhcp6_domain_search" ]; then
conf="${conf}search $new_dhcp6_domain_search$NL"
fi
for nameserver in $new_dhcp6_name_servers; do
conf="${conf}nameserver $nameserver$NL"
done
if [ -n "$conf" -a -n "$interface" ]; then
conf="# resolv.conf for $interface$NL$conf"
printf %s "$conf" | \
/sbin/resolvconf -a "$interface.inet6"
fi
}
;;
EXPIRE|FAIL|RELEASE|STOP)
[ -z "$interface" ] || /sbin/resolvconf -f -d "$interface"
;;
EXPIRE6|RELEASE6|STOP6)
[ -z "$interface" ] || /sbin/resolvconf -f -d "$interface.inet6"
;;
esac
fi
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