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D.25. /sbin/ifdown‌

#!/bin/bash

########################################################################

# Begin /sbin/ifdown

#

# Description : Interface Down

#

#!/bin/bash

########################################################################

# Begin /sbin/ifdown

#

# Description : Interface Down

#

# Authors

#

# Update

#

# Version

#

# Notes

#

#

#

# Authors

#

# Update

#

# Version

#

# Notes

#

#

#

######################################################################## 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 ;;

######################################################################## 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 ;;

-*)

*) esac

done

break ;;

*) esac

done

if [ -n "$help" ]; then

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

log_warning_msg "${file} is missing or cannot be accessed." exit 1

fi

. ${file}

if [ "$IFACE" = "" ]; then

log_failure_msg "${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="${MSG}or the specified service cannot be executed." log_failure_msg "$MSG"

exit 1

fi else

log_warning_msg "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 log_info_msg "Bringing down the ${IFACE} interface..."

ip link set ${IFACE} down evaluate_retval

fi

fi

fi

# End /sbin/ifdown

fi

fi

fi

# End /sbin/ifdown

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