Chip 2007 January, February, March & April

home *** CD-ROM | disk | FTP | other *** search

/ Chip 2007 January, February, March & April / Chip-Cover-CD-2007-02.iso / boot / i386 / rescue / sbin / ifup-dhcp < prev next >

Wrap

Text File | 2006-11-29 | 16.7 KB | 512 lines

#! /bin/bash # # Copyright (c) 2002 SuSE Linux AG Nuernberg, Germany. All rights reserved. # This program is free software; you can redistribute it and/or modify it under # the terms of the GNU General Public License as published by the Free Software # Foundation; either version 2 of the License, or (at your option) any later # version. # # This program is distributed in the hope that it will be useful, but WITHOUT # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS # FOR A PARTICULAR PURPOSE. See the GNU General Public License for more # details. # # You should have received a copy of the GNU General Public License along with # this program; if not, write to the Free Software Foundation, Inc., 59 Temple # Place, Suite 330, Boston, MA 02111-1307 USA # # Author: Christian Zoz <zoz@suse.de>, 2002-2006 # Peter Poeml <poeml@suse.de>, 2002-2006 # # $Id: ifup-dhcp 1525 2006-11-20 11:39:48Z zoz $ # usage () { echo $@ echo "Usage: if{up,down,status}-dhcp [<config>] <hwdesc> [-o <options>]" echo " hwdesc may be the interface name or any valid description" echo " of the corresponding device, for details see ifup(8)." echo "Options are: boot : we are currently booting" echo " hotplug : we are handling a hotplug event" echo " debug : be verbose" echo " rc : indicates that we are called from rcnetwork" echo "All other or wrong options are silently ignored." exit $R_USAGE } dhcpc_on_iface() { local i for i in `my_pidof $DHCLIENT`; do case $(cat /proc/$i/cmdline) in *$INTERFACE*) return 0 esac done return 1 } ifup_on_iface() { ps ax | grep -v grep | grep -qs "ifup.* $INTERFACE\>" } ###################################################################### # change the working direcory and source some common files # R_INTERNAL=1 # internal error, e.g. no config or missing scripts cd /etc/sysconfig/network || exit $R_INTERNAL test -f ./config && . ./config test -f scripts/functions && . scripts/functions || exit $R_INTERNAL # . scripts/extradebug ###################################################################### # check arguments and how we are called (in case of links) # SCRIPTNAME=${0##*/} debug $* case "${SCRIPTNAME}" in ifup-*) ACTION=start ;; ifdown-*) ACTION=stop ;; ifstatus-*) ACTION=status ;; ifrenew-*) ACTION=renew ;; *) usage esac INTERFACE=$1 case "$INTERFACE" in ""|-h|*help*) usage; esac shift if [ -n "$1" -a "$1" != "-o" ] ; then CONFIG=$INTERFACE INTERFACE=$1 fi shift test "$1" = "-o" && shift OPTIONS="$@" MODE=manual while [ $# -gt 0 ]; do case $1 in boot|onboot) MODE=onboot ;; hotplug) MODE=hotplug ;; quiet) be_quiet_has_gone ;; debug) DEBUG=yes ;; rc) RUN_FROM_RC=yes ;; *) debug unknown option $1 ;; esac shift done ###################################################################### # check presence of configuration files # test -f ./dhcp && . ./dhcp test -f ./ifcfg-$CONFIG && . ./ifcfg-$CONFIG ###################################################################### # get the interface and check if it is up # if [ -z "$INTERFACE" ] ; then usage "No interface given" fi if ! is_iface_available $INTERFACE ; then # When a hotplug remove event occurs the interface has already gone. # Nevertheless we have to clean up. if [ $ "$ACTION" != stop -o "$MODE" != hotplug $ -a "$INTERFACE" != all ] ; then logerror "interface ${INTERFACE} is not available" exit $R_NODEV fi fi ###################################################################### # determine type of dhcp client # # This script is supposed to work with both dhcpcd and the ISC DHCP client, # because there's a lot of common stuff. # If neccesary you can preselect a dhcp client; just set DHCLIENT_BIN in one of # the used config files. If not we prefer dhcpcd if available. : ${DHCLIENT_BIN:=dhcpcd} if [ -x $DHCLIENT_BIN ]; then : elif [ -x /sbin/$DHCLIENT_BIN ]; then DHCLIENT_BIN=/sbin/$DHCLIENT_BIN; elif [ -x /sbin/dhclient ]; then DHCLIENT_BIN=/sbin/dhclient else if [ "$INTERFACE" = all ]; then # 'rcnetwork stop' also calls us with "ifdown-dhcp all" in the end to make # sure that all DHCP clients are stopped. But if there is none installed, # there is nothing to do and we can silently quit exit $R_SUCCESS else logerror "DHCP client $DHCLIENT_BIN is not available" logerror "please install package 'dhcpcd' or 'dhcp-client'" exit $R_ERROR fi fi DHCLIENT=${DHCLIENT_BIN##*/} case "$ACTION" in start|renew) # avoid that the temporary resolv.conf will persist after the client stops # just because there hasn't been any resolv.conf to back up test -e /etc/resolv.conf || touch /etc/resolv.conf # if we were called at boot time, increase the time startproc waits, # because the next scripts might rely on a configured network # test "$MODE" = "boot" && STARTPROC_TIMEOUT=5 # a previous dhcpcd daemon could have been killed leaving its pidfile, # and we need to remove it before we can start a new one. if [ $DHCLIENT = dhcpcd ]; then if [ -s /var/run/dhcpcd-$INTERFACE.pid ]; then checkproc -k -p /var/run/dhcpcd-$INTERFACE.pid $DHCLIENT_BIN ret=$? if [ $ret = 1 -o $ret = 7 ]; then message removing stale pid file /var/run/dhcpcd-$INTERFACE.pid rm -f /var/run/dhcpcd-$INTERFACE.pid fi fi fi # the following code block, is only relevant if DHCLIENT_PRIMARY_DEVICE is # empty. it basically sets DHCLIENT_PRIMARY_DEVICE based on the informationen # that is provided by the cached config data in a way that a user-defined # DHCLIENT_PRIMARY_DEVICE remains untouched. if [ -z "$DHCLIENT_PRIMARY_DEVICE" ]; then # read cached config data into PRIMARY_FROM_CACHE PRIMARY_FROM_CACHE="`grep_cached_config_data primary yes`" if [ -z "$PRIMARY_FROM_CACHE" ]; then # no primary interface up-> we're the primary interface DHCLIENT_PRIMARY_DEVICE='yes' # save this fact to cached config data write_cached_config_data primary yes $INTERFACE commit_cached_config_data $INTERFACE else # primary interface already up -> DHCLIENT_PRIMARY_DEVICE='no' if [ "${PRIMARY_FROM_CACHE% }" == $INTERFACE ]; then # special case for ifrenew: # we are the primary interface which is up DHCLIENT_PRIMARY_DEVICE='yes' else DHCLIENT_PRIMARY_DEVICE='no' fi fi fi if [ "$ACTION" = 'start' ] \ && ( checkproc $DHCLIENT_BIN || [ "$DHCLIENT_PRIMARY_DEVICE" = no ]); then # let's first test if the running dhcpcd actually runs on this # interface, because then we don't want to start another one: already_running=false for i in `my_pidof $DHCLIENT`; do case $(cat /proc/$i/cmdline) in *$INTERFACE*) already_running=true;; esac done if $already_running; then if test "$RUN_FROM_RC" = yes; then while read a b c d e f g h i; do message "`printf " %-9s IP address: %s (DHCP was already running)" $i $d`" R_DHCP_BG=$R_SUCCESS done < <(ip -o -4 addr show $INTERFACE) if [ "$R_DHCP_BG" != "$R_SUCCESS" ] ; then message "`printf " %-9s DHCP already running" $INTERFACE`" fi else message "DHCP client is already running on $INTERFACE" fi exit $R_DHCP_BG fi elif [ "$ACTION" = 'renew' ]; then case $DHCLIENT in dhcpcd) for i in `my_pidof $DHCLIENT`; do case $(cat /proc/$i/cmdline) in *$INTERFACE*) dhcpcd_on_device="$dhcpcd_on_device $i" esac done for i in $dhcpcd_on_device; do kill -TERM $i &>/dev/null done sleep 1 ;; dhclient) killproc $DHCLIENT_BIN &>/dev/null ;; esac fi # there is already a dhcpcd running (or scheduled). We probably don't # want to set another default gateway and so on. Let's clear some # variables and source the ifcfg-$CONFIG again -- unless # DHCLIENT_PRIMARY_DEVICE is set to "yes". if [ "$DHCLIENT_PRIMARY_DEVICE" != yes ]; then unset DHCLIENT_SET_HOSTNAME \ DHCLIENT_SET_DOMAINNAME \ DHCLIENT_KEEP_SEARCHLIST \ DHCLIENT_MODIFY_RESOLV_CONF \ DHCLIENT_SET_DEFAULT_ROUTE \ DHCLIENT_MODIFY_NTP_CONF \ DHCLIENT_MODIFY_NIS_CONF test -f ./ifcfg-$CONFIG && . ./ifcfg-$CONFIG fi debug "Starting service dhcp client on $INTERFACE" ip link set $INTERFACE up ${MTU:+mtu $MTU} \ ${LLADDR:+address $LLADDR} $LINK_OPTIONS for a in 1 2 3 4 5; do is_iface_up $INTERFACE && break; sleep 1; done # (optionally) wait until a device is really configured sleep ${DHCLIENT_SLEEP:-0} if [ "$DHCLIENT" = "dhcpcd" ] ; then # The following DHCLIENT_ARGS are specific to dhcpcd. # (the ISC DHCP client can be finetuned via /etc/dhclient.conf # and so-called hooks (see man 8 dhclient-script) test "$DHCLIENT_DEBUG" = "yes" && args="-d" test "$DHCLIENT_UDP_CHECKSUM" = "yes" && args="$args -C" test "$DHCLIENT_SET_HOSTNAME" = "yes" && args="$args -H" test "$DHCLIENT_SET_DOMAINNAME" = "yes" && args="$args -D" test "$DHCLIENT_KEEP_SEARCHLIST" = "yes" && args="$args -K" test "$DHCLIENT_MODIFY_RESOLV_CONF" != "yes" && args="$args -R" test "$DHCLIENT_SET_DEFAULT_ROUTE" != "yes" && args="$args -G" test "$DHCLIENT_MODIFY_NTP_CONF" != "yes" && args="$args -N" test "$DHCLIENT_MODIFY_NIS_CONF" != "yes" && args="$args -Y" test -n "$DHCLIENT_TIMEOUT" \ && args="$args -t $DHCLIENT_TIMEOUT" test -n "$DHCLIENT_REBOOT_TIMEOUT" \ && args="$args -z $DHCLIENT_REBOOT_TIMEOUT" test -n "$DHCLIENT_CLIENT_ID" \ && args="$args -I $DHCLIENT_CLIENT_ID" test -n "$DHCLIENT_VENDOR_CLASS_ID" \ && args="$args -i $DHCLIENT_VENDOR_CLASS_ID" test -n "$DHCLIENT_LEASE_TIME" \ && args="$args -l $DHCLIENT_LEASE_TIME" test -n "$DHCLIENT_ADDITIONAL_OPTIONS" \ && args="$args $DHCLIENT_ADDITIONAL_OPTIONS" # send hostname for DDNS? case "$DHCLIENT_HOSTNAME_OPTION" in AUTO|auto) unset DHCLIENT_HOSTNAME_OPTION test -s /etc/HOSTNAME && read -t 1 FQHOSTNAME < /etc/HOSTNAME FQHOSTNAME=${FQHOSTNAME%%.*} # strip domain FQHOSTNAME=${FQHOSTNAME%% *} # must not contain spaces, just in case DHCLIENT_HOSTNAME_OPTION=$FQHOSTNAME ;; esac test -n "$DHCLIENT_HOSTNAME_OPTION" \ && args="$args -h $DHCLIENT_HOSTNAME_OPTION" # this used to be hardcoded in the dhcpcd binary, but we have reverted it in order # to allow innocent commandline users to use dhcpcd without calling the # dhcpcd-hook/ifup machinery [#85849] args="$args -c ${DHCLIENT_SCRIPT_EXE:-/etc/sysconfig/network/scripts/dhcpcd-hook}" DHCLIENT_ARGS=$args # just in case /var is not mounted test -d /var/lib/dhcpcd || mkdir -p /var/lib/dhcpcd timestamp=/var/lib/dhcpcd/dhcpcd-$INTERFACE.timestamp; touch $timestamp info=/var/lib/dhcpcd/dhcpcd-$INTERFACE.info if test "$RUN_FROM_RC" = yes; then message_n "`printf " %-9s (DHCP) " $INTERFACE`" # message_n "(DHCP) " else message_n "Starting DHCP Client Daemon on $INTERFACE... " fi # now start dhcpcd $DHCLIENT_BIN $DHCLIENT_ARGS $INTERFACE </dev/null &>/dev/null & # wait some more time until dhcpcd has done its job. # it would be easier to wait for the pidfile, but it is written later for ((i=0; i<${DHCLIENT_WAIT_AT_BOOT:-15}; i++)); do if [ -e $info -a ! $info -ot $timestamp ]; then continue else message_n .\ ; sleep 1 fi done if [ -e $info -a ! $info -ot $timestamp ]; then while read line; do case "$line" in IPADDR*) message_n ${line/IPADDR=/IP/Netmask: };; NETMASK*) message_n " / ${line/NETMASK=/}";; HOSTNAME*) message_n " (${line/HOSTNAME=/})";; esac done < $info message " " R_DHCP_BG=$R_SUCCESS else message "no IP address yet... backgrounding. " fi exit $R_DHCP_BG else # if we are here, then $DHCLIENT is the ISC dhclient # don't write copyright info DHCLIENT_ARGS="-q" # If ISC dhclient should be used for more than one interfaces, we have # to stop it and restart it with all interfaces when adding an # interface. !!! Currently, we do not provide that. if checkproc $DHCLIENT_BIN; then logerror "$DHCLIENT is already running for some interface." \ "Stop it first.\nIf you want to run dhcp on several " \ "interfaces, please use dhcpcd." else startproc -f -t ${STARTPROC_TIMEOUT:-1} -q $DHCLIENT_BIN \ $DHCLIENT_ARGS $INTERFACE fi fi ;; stop) debug "Shutting down service dhcp client on $INTERFACE" case $DHCLIENT in dhcpcd) # let's first test if any dhcpcd processes are running on this # interface. Unfortunately, the pid file is not there when it starts # up, so we can't rely on that. Normally, only one process is running # per interface. but we have made bad experiences with ...hotplug for i in `my_pidof $DHCLIENT`; do case $(cat /proc/$i/cmdline) in *$INTERFACE*) dhcpcd_on_device="$dhcpcd_on_device $i" esac done test "$DHCLIENT_RELEASE_BEFORE_QUIT" = "yes" \ && USE_SIGNAL="-HUP" || USE_SIGNAL="-TERM" for i in $dhcpcd_on_device; do kill $USE_SIGNAL $i &>/dev/null done # wait until the processes are gone for i in $dhcpcd_on_device; do for ((wait=0; wait<30; wait++)); do if test -d /proc/$i; then usleep 300000 else continue 2 fi if [ $wait = 20 ]; then echo process $i still not dead, sending SIGKILL kill -KILL $i &>/dev/null fi done done if [ -z "$dhcpcd_on_device" ]; then # dhcpcd may not be running (it quits if it gets an # infinite lease) info=/var/lib/dhcpcd/dhcpcd-$INTERFACE.info if test -s $info && grep -q LEASETIME=4294967295 $info; then debug "dhcpcd is no longer running on $INTERFACE, since it got" debug "an infinite lease. Manually shutting down the interface." ip addr flush dev $INTERFACE &>/dev/null ip link set dev $INTERFACE down &>/dev/null fi fi ;; dhclient) # If ISC dhclient is used for more than one interfaces, we have to stop # it and restart it without this interface when removing one interface, # or we have to use the OMAPI interface # !!! Currently, we do not provide that. killproc $DHCLIENT_BIN &>/dev/null ;; esac # We send -9 because interfaces have to stay up for STARTMODE==nfsroot test "$INTERFACE" = all && killall -9 $DHCLIENT_BIN &>/dev/null # delete primary flag from cache file delete_from_cached_config_data primary yes $INTERFACE commit_cached_config_data $INTERFACE # This is useful for pcmcia interfaces... before the modules can be # unloaded, the device must be unused. if [ "$DHCLIENT_SET_DOWN_LINK" = yes ] ; then ip link set down dev $INTERFACE fi ;; status) if test -z "`ip -o -f inet addr show $INTERFACE`"; then # interface has currently no ipv4 address assigned if dhcpc_on_iface ; then message "`printf " %-9s %s is still waiting for data" $INTERFACE $DHCLIENT`" exit $R_DHCP_BG elif ifup_on_iface ; then message "`printf " %-9s is just beeing set up" $INTERFACE`" exit $R_DHCP_BG else message "`printf " %-9s DHCP client NOT running" $INTERFACE`" exit $R_NOTRUNNING fi else # interface has at least one ipv4 address if dhcpc_on_iface ; then message "`printf " %-9s DHCP client (%s) is running" $INTERFACE $DHCLIENT`" # Show more info if not run from initscript if [ "$RUN_FROM_RC" != yes ] ; then case $DHCLIENT in dhcpcd) if test -e /var/lib/dhcpcd/dhcpcd-$INTERFACE.info; then # message " current lease for $INTERFACE:" while read line; do case "$line" in IPADDR*|NETMASK*|GATEWAY*|HOSTNAME*|DOMAIN*) message " "$line ;; DNS*|DHCPCHADDR*|DHCPSIADDR*|REBINDTIME*) message " "$line ;; *) ;; esac done < /var/lib/dhcpcd/dhcpcd-$INTERFACE.info else message /var/lib/dhcpcd/dhcpcd-$INTERFACE.info file \ not available fi ;; dhclient) if test -e /var/lib/dhcp/dhclient.leases; then message last lease in /var/lib/dhcp/dhclient.leases: awk 'BEGIN {RS="lease[[:blank:]]*{"; FS="}"} {lease=$1} END {print "{" lease "} "}' \ /var/lib/dhcp/dhclient.leases else message /var/lib/dhcp/dhclient.leases file not available fi ;; esac fi elif ifup_on_iface ; then message "`printf " %-9s is just beeing set up" $INTERFACE`" exit $R_DHCP_BG else message "`printf " %-9s DHCP client NOT running" $INTERFACE`" if [ "$RUN_FROM_RC" = yes ] ; then while read a b c d e f g h i; do message "`printf " %-9s IP address: %s (DHCP)" ${i:-$b} $d`" done < <(ip -o -4 addr show $INTERFACE) else message "$(ip addr show $INTERFACE)" fi exit $R_NOTRUNNING fi fi esac