target/linux/brcm-2.4/base-files/default/etc/preinit

   1 #!/bin/sh
   2 # Copyright (C) 2006 OpenWrt.org
   3
   4 . /etc/functions.sh
   5 . /etc/diag.sh
   6
   7 failsafe() {
   8         lock /tmp/.failsafe
   9
  10         echo "0 1 2 3 4 5u*" > /proc/switch/eth0/vlan/0/ports
  11
  12         set_state failsafe
  13         [ -x "/usr/sbin/nvram" ] && {
  14                 [ "$(nvram get boot_wait)" != "on" ] && {
  15                         nvram set boot_wait=on
  16                         nvram commit
  17                 }
  18         }
  19
  20         netmsg 192.168.1.255 "Entering Failsafe!"
  21         telnetd -l /bin/login <> /dev/null 2>&1
  22
  23         ash --login
  24 }
  25
  26 export PATH=/bin:/sbin:/usr/bin:/usr/sbin
  27 mount none /proc -t proc
  28 size=$(awk '/Mem:/ {l=5242880;print((s=$2/2)<l)?$2-l:s}' /proc/meminfo)
  29 mount none /tmp -t tmpfs -o size=$size
  30 if grep devfs /proc/filesystems > /dev/null; then
  31         mount none /dev -t devfs
  32         M0=/dev/pty/m0
  33         M1=/dev/pty/m1
  34 else
  35         mount -t sysfs none /sys
  36         mount -t tmpfs tmpfs /dev -o size=512K
  37         mknod /dev/console c 5 1
  38         mkdir /dev/shm
  39         /sbin/hotplug2 --no-persistent --coldplug --max_children 1
  40         M0=/dev/ptmx
  41         M1=/dev/ptmx
  42 fi
  43 mkdir -p /dev/pts
  44 mount none /dev/pts -t devpts
  45
  46 # the shell really doesn't like having stdin/out closed
  47 # that's why we use /dev/pty/m0 and m1 as replacement
  48 # for /dev/console if there's no serial console available
  49 dd if=/dev/console of=/dev/null bs=1 count=0 >/dev/null 2>/dev/null || \
  50         exec <$M0 >$M1 2>&0
  51
  52 insmod diag
  53 set_state preinit
  54 trap 'FAILSAFE=true' USR1
  55 echo '/sbin/hotplug.failsafe' > /proc/sys/kernel/hotplug
  56
  57 ifname=eth0
  58
  59 # hardware specific overrides
  60 case "$(cat /proc/diag/model)" in
  61         "Linksys WAP54G V1") ifname=eth1;;
  62         "ASUS WL-HDD") ifname=eth1;;
  63         "ASUS WL-300g") ifname=eth1;;
  64         "ASUS (unknown, BCM4702)") ifname=eth1;;
  65 esac
  66
  67 insmod switch-core
  68 insmod switch-robo || insmod switch-adm || rmmod switch-core
  69
  70 ifconfig $ifname 192.168.1.1 netmask 255.255.255.0 broadcast 192.168.1.255 up
  71
  72 [ -d /proc/switch/eth0 ] && {
  73         echo 1 > /proc/switch/eth0/reset
  74
  75         # this would be easier if we blasted the message across all ports
  76         # but we don't want packets leaking across interfaces
  77         for port in $(seq 0 4); do {
  78                 echo "$port 5u*" > /proc/switch/eth0/vlan/0/ports
  79                 netmsg 192.168.1.255 "Press reset now, to enter Failsafe!"
  80         }; done
  81 } || netmsg 192.168.1.255 "Press reset now, to enter Failsafe!"
  82
  83 sleep 2
  84
  85 eval ${FAILSAFE:+failsafe}
  86
  87 lock -w /tmp/.failsafe
  88 set_state preinit
  89 echo /sbin/hotplug-call > /proc/sys/kernel/hotplug
  90
  91 ifconfig $ifname 0.0.0.0 down
  92
  93 mount_root
  94 exec /sbin/init