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- # Copyright (c) 2004-2005 Gentoo Foundation
- # Distributed under the terms of the GNU General Public License v2
- # $Header: /var/cvsroot/gentoo-src/rc-scripts/net-scripts/net.modules.d/dhclient,v 1.18.2.3 2005/01/25 10:42:54 uberlord Exp $
-
- # 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 "$@"
- }
-
- # char* dhclient_provides(void)
- #
- # Returns a string to change module definition for starting up
- dhclient_provides() {
- echo "dhcp"
- }
-
- # void dhclient_depend(void)
- #
- # Sets up the dependancies for the module
- dhclient_depend() {
- after interface
- }
-
- # bool dhclient_check_installed(void)
- #
- # Returns 1 if dhclient is installed, otherwise 0
- dhclient_check_installed() {
- [[ -x /sbin/dhclient ]] && return 0
- ${1:-false} && eerror "For DHCP (dhclient) support, emerge net-misc/dhcp"
- return 1
- }
-
- # char* dhclient_get_script(void)
- #
- # Returns the filename of the script to run
- dhclient_get_script() {
- local module=$( interface_module )
- echo "${MODULES_DIR}/helpers.d/dhclient-${module}"
- }
-
- # bool dhclient_check_depends(void)
- #
- # Checks to see if we have the needed functions
- dhclient_check_depends() {
- local f
-
- for f in interface_variable interface_device interface_is_up interface_get_address interface_module; do
- [[ $( type -t ${f} ) == function ]] && continue
- eerror "dhclient: missing required function ${f}\n"
- return 1
- done
-
- return 0
- }
-
- # char* dhclient_get_vars(char *interface)
- #
- # Returns a string spaced with possible user set
- # configuration variables
- dhclient_get_vars() {
- echo "dhclient_${1} dhcp_${1}"
- }
-
- # bool dhclient_stop(char *iface)
- #
- # Stop dhclient on an interface
- # Always returns 0
- dhclient_stop() {
- local iface=${1} dhcp release pidfile="/var/run/dhclient-${1}.pid"
-
- dhclient_check_installed || return 0
- [[ ! -f ${pidfile} ]] && return 0
-
- # We check for a dhclient process first as if we attempt to release
- # an interface for which dhclient has obtained an IP in the past
- # it causes a "RELEASE" event anyway.
- local pid=$( cat ${pidfile} )
- local script=$( dhclient_get_script )
-
- eval dhcp=\" \$\{dhcp_${ifvar}\} \"
-
- ebegin "Stopping dhclient on ${iface}"
- if [[ ${dhcp} == *' release '* ]]; then
- local r=$( dhclient -q -r -sf ${script} -pf ${pidfile} ${iface} )
- [[ ${r} == deconfig ]]
- eend $? "dhclient returned a ${r}"
- 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 pidfile="/var/run/dhclient-${1}.pid"
- local ifvar=$( interface_variable ${iface} ) x
- local cffile="/etc/dhclient.conf"
-
- interface_exists ${iface} true || return 1
-
- local script=$( dhclient_get_script )
-
- # Load our options
- eval opts=\" \$\{dhclient_${ifvar}\} \"
-
- # Work out our cffile
- x="${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}" ; then
- eerror "You have to remove the script parameter from ${cffile}"
- return 1
- fi
- fi
-
- # Bring up DHCP for this interface (or alias)
- ebegin "Running dhclient"
-
- if ! clean_pidfile ${pidfile} ; then
- ewarn "dhclient is already running on ${iface}"
- eend 0
- return 0
- fi
-
- eval opts=\"\$\{dhclient_${ifvar}\}\"
- local x=$( dhclient ${opts} -1 -sf ${script} -pf ${pidfile} -q ${iface} 2>&1 )
-
- # We just check the last 5 letters
- [[ ${x:${#x} - 5:5} == bound ]]
- if [[ $? != 0 ]]; then
- echo "${x}" >&2
- # We need to kill the process if we fail
- 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
- }
-