init

   1 #!/bin/sh
   2
   3 # 'usb' or 'cdrom'
   4 MODE=usb
   5
   6 PATH="/sbin:/bin:/usr/sbin:/usr/bin"
   7
   8 busybox mount -t proc proc /proc
   9 busybox mount -t sysfs sysfs /sys
  10
  11 busybox --install -s
  12
  13 mknod /dev/null c 1 3
  14 mknod /dev/tty c 5 0
  15
  16 if [ -f /etc/modules ]; then
  17         depmod -a
  18         cat /etc/modules | while read mod; do
  19                 modprobe $mod
  20         done
  21 fi
  22
  23 echo /bin/mdev > /proc/sys/kernel/hotplug
  24 sleep 5
  25 mdev -s
  26
  27 if [ "$MODE" = "cdrom" ]; then
  28         mkdir /mnt/cdrom
  29         mount -t iso9660 /dev/cdrom /mnt/cdrom
  30 else
  31         mkdir /mnt/usb
  32         mount -t vfat /dev/sda1 /mnt/usb
  33 fi
  34
  35 mkdir /mnt/newroot_ro
  36
  37 if [ "$MODE" = "cdrom" ]; then
  38         mount -t squashfs -o loop /mnt/cdrom/debianlive/root.sfs /mnt/newroot_ro
  39 else
  40         mount -t squashfs -o loop /mnt/usb/debianlive/root.sfs /mnt/newroot_ro
  41 fi
  42
  43 mkdir /mnt/newroot_rw
  44 mount -t tmpfs -o size=16M tmpfs /mnt/newroot_rw
  45
  46 mkdir /mnt/newroot
  47 mount -t overlayfs -o lowerdir=/mnt/newroot_ro,upperdir=/mnt/newroot_rw overlayfs /mnt/newroot
  48
  49 cd /mnt/newroot
  50 mount --move . /
  51 exec chroot . /sbin/init 3 </dev/console >/dev/console 2>&1
  52
  53 reboot -f