On Jan 27, 2012, at 3:08 AM, Bruce Dubbs wrote:
> OK, I've put together the attached scripts.
>
> They seem to work for me. If there are errors, like doing
>
> ifup br0; ifup br0
>
> or
>
> ifup br0; ifup eth0
>
> or other out of order sequences, the error messages do not have a nice
> format, but I don't know if that is necessary. Correct sequences like
>
> ifup br0; ifdown br0; ifup eth0; ifdown eth0
>
> are OK. Please give them a try and let me know what you think.
> I have not tried using SERVICE="bridge dhcpcd".
>
> Of course the ifup/ifdown/ipv4-static scripts will need to go into LFS, not
> BLFS. The only change in ifconfig.eth0 is ONBOOT=no.
Looks good. You were more precise about where you performed the loop--and it
seems to make more sense. I'll try them out as soon as I can.
This is a usage point, but I'm not sure that having ifconfig.eth0 and
encouraging people to set ONBOOT=no when it's part of a bridge makes sense. In
other systems, the precedent seems to be to omit the ifconfig.<BRIDGE_PORT>
entries entirely, to avoid massive confusion--and possibly a conflict--when
someone forgets ONBOOT, and the machine loses outside network connectivity.
Could be annoying when it's a server at a colo...
The bridge script takes care of bringing the eth0 link up and taking it down,
so ifconfig.eth0 shouldn't need to exist.
* * *
I didn't think ipv4-static needed modifying, unless it was cosmetic. Would you
mind giving a quick summary of the change you made there?
It looks like you look for spaces in ipv4-static to determine if there are
multiple services. For robustness's (LOL) sake, maybe sanitize first with:
$(echo ${SERVICE} | sed s'/\s\+/ /g' | grep -q " ")?
Somewhat minor, though I'm sure someone somewhere has used a tab in a
spaced-out moment...
Q
> -- Bruce
> #!/bin/sh
> ########################################################################
> # Begin /lib/services/bridge
> #
> # Description : Bridge Boot Script
> #
> # Authors : Nathan Coulson - [email protected]
> # Bruce Dubbs - [email protected]
> #
> # Version : LFS-7.0
> #
> ########################################################################
>
> . /lib/lsb/init-functions
> . ${IFCONFIG}
>
> if [ -n "${INTERFACE}" ]; then
> log_failure_msg "INTERFACES variable missing from ${IFCONFIG}"
> exit 1
> fi
>
> case "${2}" in
> up)
> log_info_msg2 "\n"
> log_info_msg "Creating the ${1} interface..."
> brctl addbr ${1}
> ip link set ${1} up
> evaluate_retval
> for I in ${INTERFACES}; do
> log_info_msg "Adding ${I} to ${1}..."
> ip link set ${I} up &&
> brctl addif ${1} ${I}
> evaluate_retval
> done
>
> if [ "${IP_FORWARD}" = "y" -o \
> "${IP_FORWARD}" = "yes" -o \
> "${IP_FORWARD}" = "t" -o \
> "${IP_FORWARD}" = "true" -o \
> "${IP_FORWARD}" = "1" ]; then
> sysctl -w net.ipv4.ip_forward=1 > /dev/null
> log_success_msg "Setting net.ipv4.ip_forward = 1"
> fi
> ;;
>
> down)
> for I in ${INTERFACES}; do
> log_info_msg "Removing ${I} from ${1}..."
> ip link set ${I} down &&
> brctl delif ${1} ${I}
> evaluate_retval
> done
>
> log_info_msg "Bringing down the ${1} interface..."
> ip link set ${1} down
> brctl delbr ${1}
> evaluate_retval
> ;;
>
> *)
> echo "Usage: ${0} [interface] {up|down}"
> exit 1
> ;;
> esac
>
> # End /lib/services/bridge
>
> ONBOOT=yes
> IFACE=br0
> SERVICE="bridge ipv4-static"
> IP=192.168.0.22
> GATEWAY=192.168.0.1
> PREFIX=24
> BROADCAST=192.168.0.255
> CHECK_LINK=no # Don't check before created
> STP=no # Spanning tree protocol, default no
> INTERFACES=eth0 # Add to IFACE
> IP_FORWARD=true
>
> ONBOOT=no
> IFACE=eth0
> SERVICE=ipv4-static
> IP=192.168.0.22
> GATEWAY=192.168.0.1
> PREFIX=24
> BROADCAST=192.168.0.255
> #!/bin/bash
> ########################################################################
> # Begin /sbin/ifdown
> #
> # Description : Interface Down
> #
> # Authors : Nathan Coulson - [email protected]
> # Kevin P. Fleming - [email protected]
> # Update : Bruce Dubbs - [email protected]
> #
> # 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 "${file}" ]; then
> log_warning_msg "${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
>
> # Reverse the order
> SERVICES=
> for S in ${SERVICE}; do SERVICES="${SERVICES} ${S}"; done
>
> # This will run the service scripts
> if ip link show ${IFACE} > /dev/null 2>&1; then
> for S in ${SERVICES}; do
>
> if [ -n "${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
> done
> else
> log_warning_msg "Interface ${1} doesn't exist."
> fi
>
> 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
> #!/bin/sh
> ########################################################################
> # Begin /sbin/ifup
> #
> # Description : Interface Up
> #
> # Authors : Nathan Coulson - [email protected]
> # Kevin P. Fleming - [email protected]
> # Update : Bruce Dubbs - [email protected]
> #
> # Version : LFS 7.0
> #
> # 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.
> #
> ########################################################################
>
> RELEASE="7.0"
>
> 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
>
> log_info_msg "Bringing up the ${1} interface... "
>
> if [ ! -r "${file}" ]; then
> log_warning_msg "\n${file} is missing or cannot be accessed."
> exit 1
> fi
>
> . $file
>
> if [ "$IFACE" = "" ]; then
> log_failure_msg "\n${file} does not define an interface [IFACE]."
> exit 1
> fi
>
> # Do not process this service if started by boot, and ONBOOT
> # is not set to yes
> if [ "${IN_BOOT}" = "1" -a "${ONBOOT}" != "yes" ]; then
> log_info_msg2 "skipped\n"
> exit 0
> fi
>
> for S in ${SERVICES}; do
> if [ ! -n "${S}" -o ! -x "/lib/services/${S}" ]; then
> MSG="\nUnable 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
> done
>
> if [ -z "${CHECK_LINK}" -o \
> "${CHECK_LINK}" = "y" -o \
> "${CHECK_LINK}" = "yes" -o \
> "${CHECK_LINK}" = "1" ]; then
>
> # Bring up the interface
> if ip link show ${IFACE} > /dev/null 2>&1; then
> link_status=`ip link show ${IFACE}`
>
> if [ -n "${link_status}" ]; then
> if ! echo "${link_status}" | grep -q UP; then
> ip link set ${IFACE} up
> fi
> fi
>
> else
> log_warning_msg "\nInterface ${IFACE} doesn't exist."
> exit 0
> fi
> fi
>
> for S in ${SERVICE}; do
> IFCONFIG=${file} /lib/services/${S} ${IFACE} up
> done
>
> # End /sbin/ifup
> #!/bin/sh
> ########################################################################
> # Begin /lib/services/ipv4-static
> #
> # Description : IPV4 Static Boot Script
> #
> # Authors : Nathan Coulson - [email protected]
> # Kevin P. Fleming - [email protected]
> # Update : Bruce Dubbs - [email protected]
> #
> # Version : LFS 7.0
> #
> ########################################################################
>
> . /lib/lsb/init-functions
> . ${IFCONFIG}
>
> if [ -z "${IP}" ]; then
> log_failure_msg "\nIP variable missing from ${IFCONFIG}, cannot continue."
> exit 1
> fi
>
> if [ -z "${PREFIX}" -a -z "${PEER}" ]; then
> log_warning_msg "\nPREFIX variable missing from ${IFCONFIG}, assuming 24."
> PREFIX=24
> args="${args} ${IP}/${PREFIX}"
>
> elif [ -n "${PREFIX}" -a -n "${PEER}" ]; then
> log_failure_msg "\nPREFIX and PEER both specified in ${IFCONFIG}, cannot
> continue."
> exit 1
>
> elif [ -n "${PREFIX}" ]; then
> args="${args} ${IP}/${PREFIX}"
>
> elif [ -n "${PEER}" ]; then
> args="${args} ${IP} peer ${PEER}"
> fi
>
> if [ -n "${BROADCAST}" ]; then
> args="${args} broadcast ${BROADCAST}"
> fi
>
> case "${2}" in
> up)
> if [ "$(ip addr show ${1} 2>/dev/null | grep ${IP})" == "" ]; then
>
> # Cosmetic output not needed for multiple services
> if ! $(echo ${SERVICE} | grep -q " "); then
> log_info_msg2 "\n" # Terminate the previous message
> fi
>
> log_info_msg "Adding IPv4 address ${IP} to the ${1} interface..."
> ip addr add ${args} dev ${1}
> evaluate_retval
>
> if [ -n "${GATEWAY}" ]; then
> if ip route | grep -q default; then
> log_warning_msg "\nGateway already setup; skipping."
> else
> log_info_msg "Setting up default gateway..."
> ip route add default via ${GATEWAY} dev ${1}
> evaluate_retval
> fi
> fi
> else
> msg="Cannot add IPv4 address ${IP} to ${1}. Already present."
> log_warning_msg "$msg"
> fi
> ;;
>
> down)
> if [ "$(ip addr show ${1} 2>/dev/null | grep ${IP})" != "" ]; then
> log_info_msg "Removing IPv4 address ${IP} from the ${1} interface..."
> ip addr del ${args} dev ${1}
> evaluate_retval
> fi
>
> if [ -n "${GATEWAY}" ]; then
> # Only remove the gateway if ther are no remaining ipv4 addresses
> if [ "$(ip addr show ${1} 2>/dev/null | grep 'inet ')" != "" ]; then
> log_info_msg "Removing default gateway..."
> ip route del default
> evaluate_retval
> fi
> fi
> ;;
>
> *)
> echo "Usage: ${0} [interface] {up|down}"
> exit 1
> ;;
> esac
>
> # End /lib/services/ipv4-static
> --
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