LXR iproute2/ip/routel

   1#!/bin/sh
   2# SPDX-License-Identifier: GPL-2.0
   3
   4#
   5# Script created by: Stephen R. van den Berg <srb@cuci.nl>, 1999/04/18
   6# Donated to the public domain.
   7#
   8# This script transforms the output of "ip" into more readable text.
   9# "ip" is the Linux-advanced-routing configuration tool part of the
  10# iproute package.
  11#
  12
  13test "X-h" = "X$1" && echo "Usage: $0 [tablenr [raw ip args...]]" && exit 64
  14
  15test -z "$*" && set 0
  16
  17ip route list table "$@" |
  18 while read network rest
  19 do set xx $rest
  20    shift
  21    proto=""
  22    via=""
  23    dev=""
  24    scope=""
  25    src=""
  26    table=""
  27    case $network in
  28       broadcast|local|unreachable) via=$network
  29          network=$1
  30          shift
  31          ;;
  32    esac
  33    while test $# != 0
  34    do
  35       case "$1" in
  36          proto|via|dev|scope|src|table)
  37             key=$1
  38             val=$2
  39             eval "$key='$val'"
  40             shift 2
  41             ;;
  42          dead|onlink|pervasive|offload|notify|linkdown|unresolved)
  43             shift
  44             ;;
  45          *)
  46             # avoid infinite loop on unknown keyword without value at line end
  47             shift
  48             shift
  49             ;;
  50       esac
  51    done
  52    echo "$network      $via    $src    $proto  $scope  $dev    $table"
  53 done | awk -F '        ' '
  54BEGIN {
  55   format="%15s%-3s %15s %15s %8s %8s%7s %s\n";
  56   printf(format,"target","","gateway","source","proto","scope","dev","tbl");
  57 }
  58 { network=$1;
  59   mask="";
  60   if(match(network,"/"))
  61    { mask=" "substr(network,RSTART+1);
  62      network=substr(network,0,RSTART);
  63    }
  64   via=$2;
  65   src=$3;
  66   proto=$4;
  67   scope=$5;
  68   dev=$6;
  69   table=$7;
  70   printf(format,network,mask,via,src,proto,scope,dev,table);
  71 }
  72'
  73