#!/bin/sh set -e determine_implementation() { [ -x /sbin/dhcpcd ] && echo "dhcpcd" && return [ -x /sbin/udhcpc ] && echo "udhcpc" && return echo "???" } start() { case "$1" in dhcpcd) [ -z "$IF_HOSTNAME" ] && optargs="$optargs -h $IF_HOSTNAME" [ -z "$IF_VENDOR" ] && optargs="$optargs -i $IF_VENDOR" [ -z "$IF_CLIENT" ] && optargs="$optargs -i $IF_CLIENT" [ -z "$IF_LEASETIME" ] && optargs="$optargs -l $IF_LEASETIME" /sbin/dhcpcd $optargs $IFACE udhcpc) /sbin/udhcpc -b -R -p /var/run/udhcpc.$IFACE.pid -i $IFACE ;; *) echo "implementation $1 not supported" exit 1 esac } stop() { case "$1" in dhcpcd) /sbin/dhcpcd -k $IFACE ;; udhcpc) kill $(cat /var/lib/udhcpc.$IFACE.pid) ;; *) echo "implementation $1 not supported" exit 1 esac } impl=$(determine_implementation) [ -z "$VERBOSE" ] || set -x case "$MODE" in start) start $impl ;; stop) stop $impl ;; *) echo "unknown mode $MODE" ;; esac