package/base-files/files/etc/preinit

   1 #!/bin/sh
   2 # Copyright (C) 2006 OpenWrt.org
   3 export PATH=/bin:/sbin:/usr/bin:/usr/sbin
   4 . /etc/diag.sh
   5
   6 failsafe_ip() {
   7         ifconfig $ifname 192.168.1.1 netmask 255.255.255.0 broadcast 192.168.1.255 up
   8 }
   9
  10 failsafe() {
  11         set_state failsafe
  12         [ -n "$ifname" ] && grep "$ifname" /proc/net/dev >/dev/null && {
  13                 failsafe_ip
  14                 netmsg 192.168.1.255 "Entering Failsafe!"
  15                 telnetd -l /bin/login.sh <> /dev/null 2>&1
  16         }
  17         lock /tmp/.failsafe
  18         ash --login
  19 }
  20
  21 mount proc /proc -t proc
  22 mount sysfs /sys -t sysfs
  23
  24 size=$(awk '/MemTotal:/ {l=5242880;mt=($2*1024);print((s=mt/2)<l)&&(mt>l)?mt-l:s}' /proc/meminfo)
  25 mount tmpfs /tmp -t tmpfs -o size=$size,nosuid,nodev,mode=1777
  26
  27 if grep devfs /proc/filesystems > /dev/null; then
  28         mount devfs /dev -t devfs
  29         M0=/dev/pty/m0
  30         M1=/dev/pty/m1
  31         HOTPLUG=/sbin/hotplug-call
  32
  33 elif [ -x /sbin/hotplug2 ]; then
  34         mount -t tmpfs tmpfs /dev -o size=512K
  35         mknod /dev/console c 5 1
  36         /sbin/hotplug2 --set-worker /lib/hotplug2/worker_fork.so --set-rules-file /etc/hotplug2-init.rules --no-persistent --set-coldplug-cmd /sbin/udevtrigger
  37         /sbin/hotplug2 --set-worker /lib/hotplug2/worker_fork.so --set-rules-file /etc/hotplug2-init.rules --persistent &
  38         M0=/dev/ptmx
  39         M1=/dev/ptmx
  40         HOTPLUG=
  41
  42 elif [ -x /sbin/udevd ]; then
  43         mount -n -t tmpfs -o mode=0755 udev /dev
  44         [ -d /lib/udev/devices ] && cp -af /lib/udev/devices/* /dev/
  45         [ -c /dev/console ] || mknod -m 0600 /dev/console c 5 1
  46         [ -c /dev/null ] || mknod -m 0666 /dev/null c 1 3
  47         /sbin/udevd --daemon --resolve-names=never
  48         /sbin/udevadm trigger
  49         /sbin/udevadm settle
  50         M0=/dev/pty/ptmx
  51         M1=/dev/pty/ptmx
  52         HOTPLUG=
  53 fi
  54
  55 [ -d /dev/pts ] || mkdir -p /dev/pts
  56 [ -d /dev/shm ] || mkdir -p /dev/shm
  57 mount devpts /dev/pts -t devpts
  58
  59 # the shell really doesn't like having stdin/out closed
  60 # that's why we use /dev/pty/m0 and m1 as replacement
  61 # for /dev/console if there's no serial console available
  62 dd if=/dev/console of=/dev/null bs=1 count=0 >/dev/null 2>/dev/null && {
  63         M0=/dev/console
  64         M1=/dev/console
  65 }
  66
  67 exec <$M0 >$M1 2>&0
  68
  69 echo "- preinit -"
  70 set_state preinit
  71 echo "Press CTRL-C for failsafe"
  72 trap 'FAILSAFE=true' INT
  73 trap 'FAILSAFE=true' USR1
  74 if [ -e /etc/preinit.arch ]; then
  75         . /etc/preinit.arch
  76 else
  77         sleep 2
  78 fi
  79 echo "$HOTPLUG" > /proc/sys/kernel/hotplug
  80 export FAILSAFE
  81 eval ${FAILSAFE:+failsafe}
  82 lock -w /tmp/.failsafe
  83
  84 if [ -z "$INITRAMFS" ]; then
  85         mount_root
  86         [ -f /sysupgrade.tgz ] && {
  87                 echo "- config restore -"
  88                 cd /
  89                 mv sysupgrade.tgz /tmp
  90                 tar xzf /tmp/sysupgrade.tgz
  91                 rm -f /tmp/sysupgrade.tgz
  92                 sync
  93         }
  94
  95         echo "- init -"
  96
  97         exec /sbin/init
  98 fi