diff options
Diffstat (limited to 'ifdown')
| -rwxr-xr-x | ifdown | 100 |
1 files changed, 100 insertions, 0 deletions
@@ -0,0 +1,100 @@ +#!/bin/bash +######################################################################## +# Begin /sbin/ifdown +# +# Description : Interface Down +# +# Authors : Nathan Coulson - nathan@linuxfromscratch.org +# Kevin P. Fleming - kpfleming@linuxfromscratch.org +# Update : Bruce Dubbs - bdubbs@linuxfromscratch.org +# +# Version : LFS 7.0 +# +# Notes : the IFCONFIG variable is passed to the scripts found +# in the /lib/services directory, to indicate what file the +# service should source to get interface specifications. +# +######################################################################## + +RELEASE="7.0" + +USAGE="Usage: $0 [ -hV ] [--help] [--version] interface" +VERSTR="LFS ifdown, version ${RELEASE}" + +while [ $# -gt 0 ]; do + case "$1" in + --help | -h) help="y"; break ;; + + --version | -V) echo "${VERSTR}"; exit 0 ;; + + -*) echo "ifup: ${1}: invalid option" >&2 + echo "${USAGE}" >& 2 + exit 2 ;; + + *) break ;; + esac +done + +if [ -n "$help" ]; then + echo "${VERSTR}" + echo "${USAGE}" + echo + cat << HERE_EOF +ifdown is used to bring down a network interface. The interface +parameter, e.g. eth0 or eth0:2, must match the trailing part of the +interface specifications file, e.g. /etc/sysconfig/ifconfig.eth0:2. + +HERE_EOF + exit 0 +fi + +file=/etc/sysconfig/ifconfig.${1} + +# Skip backup files +[ "${file}" = "${file%""~""}" ] || exit 0 + +#. /lib/lsb/init-functions + +if [ ! -r "${file}" ]; then + echo "${file} is missing or cannot be accessed." + exit 1 +fi + +. ${file} + +if [ "$IFACE" = "" ]; then + echo "${file} does not define an interface [IFACE]." + exit 1 +fi + +# We only need to first service to bring down the interface +S=`echo ${SERVICE} | cut -f1 -d" "` + +if ip link show ${IFACE} > /dev/null 2>&1; then + if [ -n "${S}" -a -x "/lib/services/${S}" ]; then + IFCONFIG=${file} /lib/services/${S} ${IFACE} down + else + MSG="Unable to process ${file}. Either " + MSG="${MSG}the SERVICE variable was not set " + MSG="${MSG}or the specified service cannot be executed." + echo "$MSG" + exit 1 + fi +else + echo "Interface ${1} doesn't exist." +fi + +# Leave the interface up if there are additional interfaces in the device +link_status=`ip link show ${IFACE} 2>/dev/null` + +if [ -n "${link_status}" ]; then + if [ "$(echo "${link_status}" | grep UP)" != "" ]; then + if [ "$(ip addr show ${IFACE} | grep 'inet ')" == "" ]; then + echo "Bringing down the ${IFACE} interface..." + ip link set ${IFACE} down + #evaluate_retval + fi + fi +fi + +# End /sbin/ifdown |