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#!/bin/bash
# Copyright (c) 2004-2005 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# Contributed by Roy Marples (uberlord@gentoo.org)
# Fix any potential localisation problems
# Note that LC_ALL trumps LC_anything_else according to locale(7)
udhcpc() {
LC_ALL=C /sbin/udhcpc "$@"
}
# void udhcpc_depend(void)
#
# Sets up the dependancies for the module
udhcpc_depend() {
after interface
provide dhcp
functions interface_exists interface_get_address
variables udhcpc dhcp
}
# bool udhcpc_check_installed(void)
#
# Returns 1 if udhcpc is installed, otherwise 0
udhcpc_check_installed() {
[[ -x /sbin/udhcpc ]] && return 0
${1:-false} && eerror "For DHCP (udhcpc) support, emerge net-misc/udhcp"
return 1
}
# bool udhcpc_stop(char *iface)
#
# Stops udhcpc running on an interface
# Return 1 if we fail to stop udhcpc (if it's running) otherwise 0
udhcpc_stop() {
local iface="$1" pidfile="/var/run/udhcpc-$1.pid" d
[[ ! -f ${pidfile} ]] && return 0
ebegin "Stopping udhcpc on ${iface}"
local pid=$( < "${pidfile}" ) e=true
local ifvar=$( bash_variable "${iface}" )
d="dhcp_${ifvar}"
d=" ${!d} "
[[ ${d} == " " ]] && d=" ${dhcp} "
if [[ ${d} == *" release "* ]]; then
kill -s USR2 "${pid}" &>/dev/null
[[ -f "/var/cache/dhcp-${iface}.lease" ]] \
&& rm "/var/cache/dhcp-${iface}.lease"
fi
kill -s TERM "${pid}" &>/dev/null
[[ -f ${pidfile} ]] && rm -f "${pidfile}"
${e}
eend "$?"
return "$?"
}
# bool udhcpc_start(char *iface)
#
# Start DHCP on an interface by calling udhcpc $iface $options
#
# Returns 0 (true) when a DHCP address is obtained, otherwise 1
udhcpc_start() {
local iface="$1" opts pidfile="/var/run/udhcpc-$1.pid"
local cachefile="/var/cache/dhcp-$1.lease" d
interface_exists "${iface}" true || return 1
local ifvar=$( bash_variable "${iface}" ) opts
opts="udhcpc_${ifvar}"
opts="${!opts}"
d="dhcp_${ifvar}"
d=" ${!d} "
[[ ${d} == " " ]] && d=" ${dhcp} "
if [[ " ${d} " != *" nosendhost "* ]]; then
if [[ ! " ${opts}" =~ " -([hH] |-hostname=)" ]]; then
local hname=$( hostname )
[[ -n ${hname} && ${hname} != "(none)" && ${hname} != "localhost" ]] \
&& opts="${opts} --hostname=${hname}"
fi
fi
# Bring up DHCP for this interface (or alias)
ebegin "Running udhcpc"
# Stop any instance of udhcpc on this interface
udhcpc_stop "${interface}"
# Try and load the cache if it exists
if [[ -f ${cachefile} ]]; then
if [[ " ${opts}" != *" --request="* && " ${opts} " != *" -r "* ]]; then
local x=$( < "${cachefile}" )
# Check for a valid ip
[[ ${x} == *.*.*.* ]] && opts="${opts} --request=${x}"
fi
fi
if [[ ${background} == "yes" ]]; then
eval udhcpc "${opts}" --script="${MODULES_DIR}/helpers.d/udhcpc-wrapper" \
--pidfile="${pidfile}" --interface="${iface}" &>/dev/null &
eend 0
go_background
fi
x=$( eval udhcpc "${opts}" --now --pidfile="${pidfile}" \
--interface="${iface}" \
--script="${MODULES_DIR}/helpers.d/udhcpc-wrapper" 2>&1 \
| egrep -v '^info,' )
# We just check the last 5 letters
[[ ${x:((${#x} - 5)):5} == "bound" ]]
eend "$?" "${x}" || return 1
# DHCP succeeded, show address retrieved
local addr=$( interface_get_address "${iface}" )
einfo "${iface} received address ${addr}"
return 0
}
# vim:ts=4
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