diff options
Diffstat (limited to 'xi/bin/ifup')
-rwxr-xr-x | xi/bin/ifup | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/xi/bin/ifup b/xi/bin/ifup new file mode 100755 index 0000000..7466150 --- /dev/null +++ b/xi/bin/ifup @@ -0,0 +1,136 @@ +#!/bin/sh +######################################################################## +# Begin /sbin/ifup +# +# Description : Interface Up +# +# Authors : Nathan Coulson - nathan@linuxfromscratch.org +# Kevin P. Fleming - kpfleming@linuxfromscratch.org +# Update : Bruce Dubbs - bdubbs@linuxfromscratch.org +# +# Version : LFS 7.2 +# +# Notes : The IFCONFIG variable is passed to the SERVICE script +# in the /lib/services directory, to indicate what file the +# service should source to get interface specifications. +# +######################################################################## + +up() +{ + if ip link show $1 > /dev/null 2>&1; then + link_status=`ip link show $1` + + if [ -n "${link_status}" ]; then + if ! echo "${link_status}" | grep -q UP; then + ip link set $1 up + fi + fi + + else + echo "Interface ${IFACE} doesn't exist." + exit 1 + fi +} + +RELEASE="7.2" + +USAGE="Usage: $0 [ -hV ] [--help] [--version] interface" +VERSTR="LFS ifup, 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 "${USAGE}" + echo + cat << HERE_EOF +ifup is used to bring up a network interface. The interface +parameter, e.g. eth0 or eth0:2, must match the trailing part of the +interface specifications file, e.g. /etc/sysconfig/ifconfig.eth0:2. + +HERE_EOF + exit 0 +fi + +file=/etc/sysconfig/ifconfig.${1} + +# Skip backup files +[ "${file}" = "${file%""~""}" ] || exit 0 + +#. /lib/lsb/init-functions + +echo "Bringing up the ${1} interface... " + +if [ ! -r "${file}" ]; then + echo "${file} is missing or cannot be accessed." + exit 1 +fi + +. $file + +if [ "$IFACE" = "" ]; then + echo "${file} does not define an interface [IFACE]." + exit 1 +fi + +# Do not process this service if started by boot, and ONBOOT +# is not set to yes +if [ "${IN_BOOT}" = "1" -a "${ONBOOT}" != "yes" ]; then + echo "skipped" + exit 0 +fi + +for S in ${SERVICE}; do + if [ ! -x "/lib/services/${S}" ]; then + echo "Unable to process ${file}. Either " + echo "${MSG}the SERVICE '${S} was not present " + echo "${MSG}or cannot be executed." + echo "$MSG" + exit 1 + fi +done + +# Create/configure the interface +for S in ${SERVICE}; do + IFCONFIG=${file} /lib/services/${S} ${IFACE} up +done + +# Bring up the interface and any components +for I in $IFACE $INTERFACE_COMPONENTS; do up $I; done + +# Set MTU if requested. Check if MTU has a "good" value. +if test -n "${MTU}"; then + if [[ ${MTU} =~ ^[0-9]+$ ]] && [[ $MTU -ge 68 ]] ; then + for I in $IFACE $INTERFACE_COMPONENTS; do + ip link set dev $I mtu $MTU; + done + else + echo "Invalid MTU $MTU" + fi +fi + +# Set the route default gateway if requested +if [ -n "${GATEWAY}" ]; then + if ip route | grep -q default; then + echo "Gateway already setup; skipping." + else + echo "Setting up default gateway..." + ip route add default via ${GATEWAY} dev ${IFACE} + #evaluate_retval + fi +fi + +# End /sbin/ifup |