source: projects/initscripts/trunk/sysconfig/network-scripts/ifup-routes @ 1108

#! /bin/bash
#
# adds static routes which go through device $1
if [ -z "$1" ]; then
    echo $"usage: ifup-routes <net-device> [<nickname>]"
    exit 1
fi

handle_file () {
    . $1
    routenum=0
    while [ "x$(eval echo '$'ADDRESS$routenum)x" != "xx" ]; do
        eval `ipcalc -p $(eval echo '$'ADDRESS$routenum) $(eval echo '$'NETMASK$routenum)`
        line="$(eval echo '$'ADDRESS$routenum)/$PREFIX"
        if [ "x$(eval echo '$'GATEWAY$routenum)x" != "xx" ]; then
            line="$line via $(eval echo '$'GATEWAY$routenum)"
        fi
        line="$line dev $2"
        /sbin/ip route add $line
        routenum=$(($routenum+1))
    done
}

FILES="/etc/sysconfig/network-scripts/route-$1"
if [ -n "$2" -a "$2" != "$1" ]; then
    FILES="$FILES /etc/sysconfig/network-scripts/route-$2"
fi

MATCH='^[[:space:]]*(\#.*)?$'

for file in $FILES; do
   if [ -f "$file" ]; then
       if egrep -q '^[[:space:]]*ADDRESS[0-9]+=' $file ; then
           # new format
           handle_file $file ${1%:*}
       else
           # older format
           { cat "$file" ; echo ; } | while read line; do
               if [[ ! "$line" =~ $MATCH ]]; then
                   /sbin/ip route add $line
               fi
           done
       fi
   fi
done


# Red Hat network configuration format
NICK=${2:-$1}
CONFIG="/etc/sysconfig/network-scripts/$NICK.route"
[ -f $CONFIG ] && handle_file $CONFIG $1


# Routing rules
FILES="/etc/sysconfig/network-scripts/rule-$1"
if [ -n "$2" -a "$2" != "$1" ]; then
    FILES="$FILES /etc/sysconfig/network-scripts/rule-$2"
fi

for file in $FILES; do
   if [ -f "$file" ]; then
       { cat "$file" ; echo ; } | while read line; do
           if [[ ! "$line" =~ $MATCH ]]; then
               /sbin/ip rule add $line
           fi
       done
   fi
done