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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)
dhclient() {
LC_ALL=C /sbin/dhclient "$@"
}
# void dhclient_depend(void)
#
# Sets up the dependancies for the module
dhclient_depend() {
after interface
provide dhcp
functions interface_exists interface_get_address
variables dhclient dhcp
}
# bool dhclient_check_installed(void)
#
# Returns 1 if dhclient is installed, otherwise 0
dhclient_check_installed() {
[[ -x /sbin/dhclient ]] && return 0
${1:-false} && eerror "For DHCP (dhclient) support, emerge net-misc/dhcp"
return 1
}
# bool dhclient_stop(char *iface)
#
# Stop dhclient on an interface
# Always returns 0
dhclient_stop() {
local iface="$1" d
local pidfile="/var/run/dhclient-${iface}.pid"
[[ ! -f ${pidfile} ]] && return 0
# We check for a dhclient process first as if we attempt to release
# an interface for which dhclient has obtained an IP in the past
# it causes a "RELEASE" event anyway.
local pid=$( < "${pidfile}" )
local ifvar=$( bash_variable "${iface}" )
d="dhcp_${ifvar}"
d=" ${!d} "
[[ ${d} == " " ]] && d=" ${dhcp} "
ebegin "Stopping dhclient on ${iface}"
if [[ ${d} == *" release "* ]]; then
local r=$( dhclient -q -r -pf "${pidfile}" \
-sf "${MODULES_DIR}/helpers.d/dhclient-wrapper" "${iface}" )
[[ ${r} == "deconfig" ]]
eend $? "dhclient returned a ${r}"
[[ -f "/var/cache/dhcp-${iface}.lease" ]] \
&& rm -f "/var/cache/dhcp-${iface}.lease"
else
kill -s TERM "${pid}" 2>/dev/null
clean_pidfile "${pidfile}"
eend 0
fi
return 0
}
# bool dhclient_start(char *iface)
#
# Start DHCP on an interface by calling dhclient $iface $options
#
# Returns 0 (true) when a DHCP address is obtained, otherwise 1
dhclient_start() {
local iface="$1" opts ifvar=$( bash_variable "$1" ) d
local pidfile="/var/run/dhclient-${iface}.pid" edit=""
local cffile="/etc/dhcp/dhclient.conf"
interface_exists "${iface}" true || return 1
edit="dhclient_edit_config_${ifvar}"
[[ -z ${!edit} ]] && edit="dhclient_edit_config"
if [[ ${!edit} == "yes" || ${!edit} == "true" ]]; then
edit=true
else
edit=false
fi
# Load our options
opts="dhclient_${ifvar}"
opts="${!opts}"
# Work out our cffile
x="${opts##* -cf }"
if [[ ${x} != "${opts}" ]]; then
x="${x%% *}"
if [[ -n ${x} ]]; then
cffile="${x}"
opts="${opts//-cf ${cffile}/}"
fi
fi
opts="${opts} -cf ${cffile}"
# Ensure that the cffile does not contain any script lines
# as that will stop our helpers from running
if [[ -e ${cffile} ]] ; then
if grep -q "^[ \t]*script " "${cffile}" 2>/dev/null ; then
if ${edit} ; then
sed -i '/^[ \t]*script /d' "${cffile}" || return 1
else
eerror "You have to remove the script parameter from ${cffile}"
return 1
fi
fi
else
${edit} && touch "${cffile}" 2>/dev/null
fi
d="dhcp_${ifvar}"
d=" ${!d} "
[[ ${d} == " " ]] && d=" ${dhcp} "
# Send our hostname by editing cffile
if ${edit} && [[ -e ${cffile} && ${d} != *" nosendhost "* ]] ; then
local hname=$( hostname )
if [[ ${hname} != "(none)" && ${hname} != "localhost" ]]; then
sed -i '/^[ \t]*send[ \t]*host-name[ \t]*/d' "${cffile}"
if [[ -s ${cffile} ]]; then
sed -i '1 isend host-name "'"${hname}"'";' "${cffile}"
else
echo "send host-name \"${hname}\";" > "${cffile}"
fi
fi
fi
# Bring up DHCP for this interface (or alias)
ebegin "Running dhclient"
# Stop dhclient if it's already running
dhclient_stop "${iface}"
if [[ ${background} == "yes" ]]; then
eval dhclient "${opts}" -pf "${pidfile}" -q \
-sf "${MODULES_DIR}/helpers.d/dhclient-wrapper" \
"${iface}" &>/dev/null &
eend 0
go_background
fi
local x=$( eval dhclient "${opts}" -1 -pf "${pidfile}" \
-sf "${MODULES_DIR}/helpers.d/dhclient-wrapper" -q "${iface}" 2>&1 )
# We just check the last 5 letters
[[ ${x:${#x} - 5:5} == "bound" ]]
if [[ $? != "0" ]]; then
echo "${x}"
# We need to kill the process if we fail
[[ -e ${pidfile} ]] && kill -s TERM $( < "${pidfile}" ) 2>/dev/null
eend 1
return 1
fi
eend 0
# 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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