examples/udhcp/simple.script

   1 #!/bin/sh
   2 # udhcpc script edited by Tim Riker <Tim@Rikers.org>
   3
   4 RESOLV_CONF="/etc/resolv.conf"
   5
   6 [ -n "$1" ] || { echo "Error: should be called from udhcpc"; exit 1; }
   7
   8 NETMASK=""
   9 [ -n "$subnet" ] && NETMASK="netmask $subnet"
  10 BROADCAST="broadcast +"
  11 [ -n "$broadcast" ] && BROADCAST="broadcast $broadcast"
  12
  13 case "$1" in
  14         deconfig)
  15                 echo "Setting IP address 0.0.0.0 on $interface"
  16                 ifconfig $interface 0.0.0.0
  17                 ;;
  18
  19         renew|bound)
  20                 echo "Setting IP address $ip on $interface"
  21                 ifconfig $interface $ip $NETMASK $BROADCAST
  22
  23                 if [ -n "$router" ] ; then
  24                         echo "Deleting routers"
  25                         while route del default gw 0.0.0.0 dev $interface ; do
  26                                 :
  27                         done
  28
  29                         metric=0
  30                         for i in $router ; do
  31                                 echo "Adding router $i"
  32                                 route add default gw $i dev $interface metric $metric
  33                                 : $(( metric += 1 ))
  34                         done
  35                 fi
  36
  37                 echo "Recreating $RESOLV_CONF"
  38                 # If the file is a symlink somewhere (like /etc/resolv.conf
  39                 # pointing to /run/resolv.conf), make sure things work.
  40                 realconf=$(realpath "$RESOLV_CONF" 2>/dev/null || echo "$RESOLV_CONF")
  41                 tmpfile="$realconf-$$"
  42                 > "$tmpfile"
  43                 [ -n "$domain" ] && echo "search $domain" >> "$tmpfile"
  44                 for i in $dns ; do
  45                         echo " Adding DNS server $i"
  46                         echo "nameserver $i" >> "$tmpfile"
  47                 done
  48                 mv "$tmpfile" "$realconf"
  49                 ;;
  50 esac
  51
  52 exit 0