target/linux/au1000-2.6/base-files/default/etc/preinit

   1 #!/bin/sh
   2 # Copyright (C) 2007 OpenWrt.org
   3
   4 . /etc/functions.sh
   5 . /etc/diag.sh
   6
   7 failsafe() {
   8         lock /tmp/.failsafe
   9
  10         set_state failsafe
  11
  12         netmsg 192.168.1.255 "Entering Failsafe!"
  13         telnetd -l /bin/login <> /dev/null 2>&1
  14
  15         ash --login
  16 }
  17
  18 export PATH=/bin:/sbin:/usr/bin:/usr/sbin
  19 mount none /proc -t proc
  20 size=$(awk '/Mem:/ {l=5242880;print((s=$2/2)<l)?$2-l:s}' /proc/meminfo)
  21 mount none /tmp -t tmpfs -o size=$size
  22 if grep devfs /proc/filesystems > /dev/null; then
  23         mount none /dev -t devfs
  24         M0=/dev/pty/m0
  25         M1=/dev/pty/m1
  26 else
  27         mount -t sysfs none /sys
  28         mount -t tmpfs tmpfs /dev -o size=512K
  29         mknod /dev/console c 5 1
  30         mkdir /dev/shm
  31         /sbin/hotplug2 --no-persistent --coldplug --max_children 1
  32         M0=/dev/ptmx
  33         M1=/dev/ptmx
  34 fi
  35 mkdir -p /dev/pts
  36 mount none /dev/pts -t devpts
  37
  38 # the shell really doesn't like having stdin/out closed
  39 # that's why we use /dev/pty/m0 and m1 as replacement
  40 # for /dev/console if there's no serial console available
  41 dd if=/dev/console of=/dev/null bs=1 count=0 >/dev/null 2>/dev/null || \
  42         exec <$M0 >$M1 2>&0
  43
  44 set_state preinit
  45 #FIXME : use the MTX-1 button to catch failsafe
  46 trap 'FAILSAFE=true' USR1
  47 echo '/sbin/hotplug' > /proc/sys/kernel/hotplug
  48
  49 ifname=eth0
  50
  51 eval ${FAILSAFE:+failsafe}
  52
  53 lock -w /tmp/.failsafe
  54 set_state preinit
  55 echo /sbin/hotplug-call > /proc/sys/kernel/hotplug
  56
  57 mount_root
  58 exec /sbin/init