/etc/wide-dhcpv6/dhcp6c-ifupdown is in wide-dhcpv6-client 20080615-19.
This file is owned by root:root, with mode 0o755.
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 | #!/bin/sh
# Updates information whenever a network interface is brought up.
[ "$IFACE" = "lo" ] && exit 0
[ -r /etc/default/wide-dhcpv6-client ] || exit 0
[ -x /usr/sbin/dhcp6ctl ] || exit 0
# Check if dhcp6c is running
pidof dhcp6c > /dev/null 2>&1 ; [ $? -eq 1 ] && exit 0
. /etc/default/wide-dhcpv6-client
case $MODE in
start|stop)
for i in $INTERFACES ; do
if [ "$IFACE" = "$i" ] ; then
/usr/sbin/dhcp6ctl $MODE interface $IFACE
exit 0
fi
done
;;
*)
if [ "$VERBOSITY" = "1" ] ; then
echo "dhcp6c-ifupdown: unknown mode \"$MODE\""
fi
exit 1
;;
esac
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