132 lines
3.2 KiB
Bash
Executable File
132 lines
3.2 KiB
Bash
Executable File
#!/bin/sh
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########################################################################
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# Begin /sbin/ifup
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#
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# Description : Interface Up
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#
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# Authors : Nathan Coulson - nathan@linuxfromscratch.org
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# Kevin P. Fleming - kpfleming@linuxfromscratch.org
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# Update : Bruce Dubbs - bdubbs@linuxfromscratch.org
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#
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# Version : LFS 7.2
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#
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# Notes : The IFCONFIG variable is passed to the SERVICE script
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# in the /lib/services directory, to indicate what file the
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# service should source to get interface specifications.
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#
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########################################################################
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up()
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{
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if ip link show $1 > /dev/null 2>&1; then
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link_status=`ip link show $1`
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if [ -n "${link_status}" ]; then
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if ! echo "${link_status}" | grep -q UP; then
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ip link set $1 up
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fi
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fi
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else
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log_failure_msg "\nInterface ${1} doesn't exist."
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exit 1
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fi
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}
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RELEASE="7.2"
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USAGE="Usage: $0 [ -hV ] [--help] [--version] interface"
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VERSTR="LFS ifup, version ${RELEASE}"
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while [ $# -gt 0 ]; do
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case "$1" in
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--help | -h) help="y"; break ;;
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--version | -V) echo "${VERSTR}"; exit 0 ;;
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-*) echo "ifup: ${1}: invalid option" >&2
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echo "${USAGE}" >& 2
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exit 2 ;;
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*) break ;;
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esac
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done
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if [ -n "$help" ]; then
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echo "${VERSTR}"
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echo "${USAGE}"
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echo
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cat << HERE_EOF
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ifup is used to bring up a network interface. The interface
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parameter, e.g. eth0 or eth0:2, must match the trailing part of the
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interface specifications file, e.g. /etc/sysconfig/ifconfig.eth0:2.
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HERE_EOF
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exit 0
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fi
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file=/etc/sysconfig/ifconfig.${1}
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# Skip backup files
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[ "${file}" = "${file%""~""}" ] || exit 0
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. /lib/lsb/init-functions
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log_info_msg "Bringing up the ${1} interface... "
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if [ ! -r "${file}" ]; then
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log_failure_msg2 "${file} is missing or cannot be accessed."
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exit 1
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fi
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. $file
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# Do not process this service if started by boot, and ONBOOT
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# is not set to yes
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if [ "${IN_BOOT}" = "1" -a "${ONBOOT}" != "yes" ]; then
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log_info_msg2 "skipped"
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exit 0
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fi
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for S in ${SERVICE}; do
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if [ ! -x "/lib/services/${S}" ]; then
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MSG="\nUnable to process ${file}. Either "
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MSG="${MSG}the SERVICE '${S} was not present "
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MSG="${MSG}or cannot be executed."
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log_failure_msg "$MSG"
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exit 1
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fi
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done
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# Create/configure the interface
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for S in ${SERVICE}; do
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IFCONFIG=${file} /lib/services/${S} ${1} up
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done
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# Bring up the interface and any components
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for I in $1 $INTERFACE_COMPONENTS; do up $I; done
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# Set MTU if requested. Check if MTU has a "good" value.
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if test -n "${MTU}"; then
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if [[ ${MTU} =~ ^[0-9]+$ ]] && [[ $MTU -ge 68 ]] ; then
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for I in $1 $INTERFACE_COMPONENTS; do
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ip link set dev $I mtu $MTU;
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done
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else
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log_info_msg2 "Invalid MTU $MTU"
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fi
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fi
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# Set the route default gateway if requested
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if [ -n "${GATEWAY}" ]; then
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if ip route | grep -q default; then
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log_warning_msg "\nGateway already setup; skipping."
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else
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log_info_msg "Setting up default gateway..."
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ip route add default via ${GATEWAY} dev ${1}
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evaluate_retval
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fi
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fi
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# End /sbin/ifup
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