debian/tree/busybox-udeb/usr/share/udhcpc/default.script

   1 #!/bin/sh -e
   2
   3 # udhcpc client script to be used by Debian Installer
   4 # Copyright (C) 2009, 2010 Otavio Salvador <otavio@debian.org>
   5
   6 comma_separate() {
   7         echo "$1" | sed 's/ /,/g'
   8 }
   9
  10 do_resolv_conf() {
  11         local cfg=/etc/resolv.conf
  12
  13         if [ -n "$domain" ] || [ -n "$dns" ]; then
  14                 echo -n > $cfg
  15                 if [ -n "$domain" ]; then
  16                         echo search $domain >> $cfg
  17                 fi
  18
  19                 for i in $dns ; do
  20                         echo nameserver $i >> $cfg
  21                 done
  22         fi
  23 }
  24
  25 do_hostname() {
  26         local current=$(cat /proc/sys/kernel/hostname)
  27
  28         if [ -z "$current" ] || [ "$current" = "(none)" ]; then
  29                 echo "$hostname" > /proc/sys/kernel/hostname
  30         fi
  31 }
  32
  33 do_leases() {
  34         local file="/var/lib/udhcp/udhcpc.leases"
  35
  36         mkdir -p /var/lib/udhcp
  37         cat >> $file <<EOF
  38 lease {
  39   interface "$interface";
  40   fixed-address $ip;
  41   filename "$boot_file";
  42   option subnet-mask $subnet;
  43   option domain-name "$domain";
  44   option host-name "$hostname";
  45   option domain-name-servers $(comma_separate "$dns");
  46   option dhcp-server-identifier $serverid;
  47   option dhcp-lease-time $lease;
  48   option routers $(comma_separate "$router");
  49   option ntp-servers $(comma_separate "$ntpsrv");
  50 }
  51 EOF
  52 }
  53
  54 case "$1" in
  55         deconfig)
  56                 ip link set "$interface" up
  57                 ip addr flush dev "$interface"
  58                 ;;
  59
  60         bound|renew)
  61                 do_hostname
  62
  63                 ip addr add "$ip/$subnet" dev "$interface"
  64
  65                 if [ -n "$mtu" ]; then
  66                         ip link set "$interface" mtu "$mtu"
  67                 fi
  68
  69                 for r in "$router"; do
  70                         ip route add default via "$r"
  71                 done
  72
  73                 do_resolv_conf
  74
  75                 # Get the domain name into a file suitable for netcfg to read.
  76                 printf "$domain" > /tmp/domain_name
  77
  78                 if [ -n "$ntpsrv" ]; then
  79                         printf "$ntpsrv" > /tmp/dhcp-ntp-servers
  80                 fi
  81
  82                 logger -t udhcpc "Got IP $ip (using $interface) and routing through $router"
  83
  84                 do_leases
  85                 ;;
  86         *)
  87                 echo "udhcpc: has been called with an unknown param: $1"
  88                 ;;
  89 esac
  90
  91 exit 0