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|
#!/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
# DJ Lucas - dj@linuxfromscratch.org
#
# Version : LFS 7.7
#
# 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()
{
log_info_msg "Bringing up the ${1} interface..."
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
log_failure_msg "Interface ${IFACE} doesn't exist."
exit 1
fi
evaluate_retval
}
RELEASE="7.7"
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
if [ ! -r "${file}" ]; then
log_failure_msg "Unable to bring up ${1} interface! ${file} is missing or cannot be accessed."
exit 1
fi
. $file
if [ "$IFACE" = "" ]; then
log_failure_msg "Unable to bring up ${1} interface! ${file} does not define an interface [IFACE]."
exit 1
fi
# Do not process this service if started by boot, and ONBOOT
# is not set to yes
if [ "${IN_BOOT}" = "1" -a "${ONBOOT}" != "yes" ]; then
exit 0
fi
# Bring up the interface
if [ "$VIRTINT" != "yes" ]; then
up ${IFACE}
fi
for S in ${SERVICE}; do
if [ ! -x "/lib/services/${S}" ]; then
MSG="\nUnable to process ${file}. Either "
MSG="${MSG}the SERVICE '${S} was not present "
MSG="${MSG}or cannot be executed."
log_failure_msg "$MSG"
exit 1
fi
done
if [ "${SERVICE}" = "wpa" ]; then log_success_msg; fi
# Create/configure the interface
for S in ${SERVICE}; do
IFCONFIG=${file} /lib/services/${S} ${IFACE} up
done
# Set link up virtual interfaces
if [ "${VIRTINT}" == "yes" ]; then
up ${IFACE}
fi
# Bring up any additional interface components
for I in $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
log_info_msg2 "Invalid MTU $MTU"
fi
fi
# Set the route default gateway if requested
if [ -n "${GATEWAY}" ]; then
if ip route | grep -q default; then
log_warning_msg "Gateway already setup; skipping."
else
log_info_msg "Adding default gateway ${GATEWAY} to the ${IFACE} interface..."
ip route add default via ${GATEWAY} dev ${IFACE}
evaluate_retval
fi
fi
# End /sbin/ifup
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