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D.25. /etc/sysconfig/network-devices/ifup

#!/bin/sh
########################################################################
# Begin $network_devices/ifup
#
# Description : Interface Up
#
# Authors     : Nathan Coulson - nathan@linuxfromscratch.org
#               Kevin P. Fleming - kpfleming@linuxfromscratch.org
#
# Version     : 00.00
#
# Notes       : the IFCONFIG variable is passed to the scripts found
#               in the services directory, to indicate what file the
#               service should source to get environmental variables.
#
########################################################################

. /etc/sysconfig/rc 
. ${rc_functions} 

# Collect a list of configuration files for our interface
if [ -n "${2}" ]; then
    for file in ${@#$1} # All parameters except $1
  do
        FILES="${FILES} ${network_devices}/ifconfig.${1}/${file}"
    done
elif [ -d "${network_devices}/ifconfig.${1}" ]; then
    FILES=`echo ${network_devices}/ifconfig.${1}/*`
else 
    FILES="${network_devices}/ifconfig.${1}"
fi

boot_mesg "Bringing up the ${1} interface..."
boot_mesg_flush

# Process each configruation file
for file in ${FILES}; do
    # skip backup files
    if [ "${file}" != "${file%""~""}" ]; then
        continue
    fi

    if [ ! -f "${file}" ]; then
        boot_mesg "${file} is not a network configuration file or directory." ${WARNING}
        echo_warning
        continue
    fi

    (
        . ${file}

        # Will not process this service if started by boot, and ONBOOT
        # is not set to yes
        if [ "${IN_BOOT}" = "1" -a "${ONBOOT}" != "yes" ]; then
            continue
        fi
        # Will not process this service if started by hotplug, and 
        # ONHOTPLUG is not set to yes
        if [ "${IN_HOTPLUG}" = "1" -a "${ONHOTPLUG}" != "yes" \
                    -a "${HOSTNAME}" != "(none)" ]; then continue
        fi

        if [ -n "${SERVICE}" -a -x "${network_devices}/services/${SERVICE}" ]; then
            if [ -z "${CHECK_LINK}" -o "${CHECK_LINK}" = "y" \
                            -o "${CHECK_LINK}" = "yes" -o "${CHECK_LINK}" = "1" ]; then
                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
                    boot_mesg "Interface ${1} doesn't exist." ${WARNING}
                    echo_warning
                    continue
                fi
            fi
            IFCONFIG=${file} ${network_devices}/services/${SERVICE} ${1} up
        else
            boot_mesg "Unable to process ${file}.  Either" ${FAILURE}
            boot_mesg " the SERVICE variable was not set,"
            boot_mesg " or the specified service cannot be executed."
            echo_failure
            continue
        fi
    )
done

# End $network_devices/ifup

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