cirros-testvm/src-cirros/buildroot-2015.05/package/busybox/udhcpc.script

   1 #!/bin/sh
   2
   3 # udhcpc script edited by Tim Riker <Tim@Rikers.org>
   4
   5 [ -z "$1" ] && echo "Error: should be called from udhcpc" && exit 1
   6
   7 RESOLV_CONF="/etc/resolv.conf"
   8 [ -e $RESOLV_CONF ] || touch $RESOLV_CONF
   9 [ -n "$broadcast" ] && BROADCAST="broadcast $broadcast"
  10 [ -n "$subnet" ] && NETMASK="netmask $subnet"
  11
  12 case "$1" in
  13         deconfig)
  14                 /sbin/ifconfig $interface up
  15                 /sbin/ifconfig $interface 0.0.0.0
  16
  17                 # drop info from this interface
  18                 # resolv.conf may be a symlink to /tmp/, so take care
  19                 TMPFILE=$(mktemp)
  20                 grep -vE "# $interface\$" $RESOLV_CONF > $TMPFILE
  21                 cat $TMPFILE > $RESOLV_CONF
  22                 rm -f $TMPFILE
  23
  24                 if [ -x /usr/sbin/avahi-autoipd ]; then
  25                         /usr/sbin/avahi-autoipd -k $interface
  26                 fi
  27                 ;;
  28
  29         leasefail|nak)
  30                 if [ -x /usr/sbin/avahi-autoipd ]; then
  31                         /usr/sbin/avahi-autoipd -wD $interface --no-chroot
  32                 fi
  33                 ;;
  34
  35         renew|bound)
  36                 if [ -x /usr/sbin/avahi-autoipd ]; then
  37                         /usr/sbin/avahi-autoipd -k $interface
  38                 fi
  39                 /sbin/ifconfig $interface $ip $BROADCAST $NETMASK
  40
  41                 if [ -n "$router" ] ; then
  42                         echo "deleting routers"
  43                         while route del default gw 0.0.0.0 dev $interface 2> /dev/null; do
  44                                 :
  45                         done
  46
  47                         for i in $router ; do
  48                                 route add default gw $i dev $interface
  49                         done
  50                 fi
  51
  52                 # drop info from this interface
  53                 # resolv.conf may be a symlink to /tmp/, so take care
  54                 TMPFILE=$(mktemp)
  55                 grep -vE "# $interface\$" $RESOLV_CONF > $TMPFILE
  56                 cat $TMPFILE > $RESOLV_CONF
  57                 rm -f $TMPFILE
  58
  59                 [ -n "$domain" ] && echo "search $domain # $interface" >> $RESOLV_CONF
  60                 for i in $dns ; do
  61                         echo adding dns $i
  62                         echo "nameserver $i # $interface" >> $RESOLV_CONF
  63                 done
  64                 ;;
  65 esac
  66
  67 HOOK_DIR="$0.d"
  68 for hook in "${HOOK_DIR}/"*; do
  69     [ -f "${hook}" -a -x "${hook}" ] || continue
  70     "${hook}" "${@}"
  71 done
  72
  73 exit 0