openwrt/package/base-files/default/bin/firstboot

   1 #!/bin/sh
   2 # $Id$
   3
   4 rom=$(awk '/squashfs/ {print $2}' /proc/mounts)
   5 jffs=$(awk '/jffs2/ {print $2}' /proc/mounts)
   6
   7 dupe() { # <new_root> <old_root>
   8         cd $1
   9         echo -n "creating directories... "
  10         {
  11                 cd $2
  12                 find . -xdev -type d
  13                 echo "./dev ./jffs ./mnt ./proc ./tmp"
  14                 # xdev skips mounted directories
  15                 cd $1
  16         } | xargs mkdir -p
  17         echo "done"
  18
  19         echo -n "setting up symlinks... "
  20         for file in $(cd $2; find . -xdev -type f;); do
  21                 case "$file" in
  22                 ./rom/note) ;; #nothing
  23                 ./etc/config*|\
  24                 ./usr/lib/ipkg/info/*) cp -af $2/$file $file;;
  25                 *) ln -sf /rom/${file#./*} $file;;
  26                 esac
  27         done
  28         for file in $(cd $2; find . -xdev -type l;); do
  29                 cp -af $2/${file#./*} $file
  30         done
  31         echo "done"
  32 }
  33
  34 pivot() { # <new_root> <old_root>
  35         mount -o move /proc $1/proc && \
  36         pivot_root $1 $1$2 && {
  37                 mount -o move $2/dev /dev
  38                 mount -o move $2/tmp /tmp
  39                 mount -o move $2/jffs /jffs 2>&-
  40                 return 0
  41         }
  42 }
  43
  44 mountdp() { # <device> <mount_point> <ignored> <fs>
  45         dev=$1; mnt=$2; shift 2; opt=$*
  46         mount $dev $mnt $opt
  47         dupe $mnt $rom
  48         pivot $mnt /rom
  49 }
  50
  51 fopivot() { # <rw_root> <ro_root> <dupe?>
  52         root=$1
  53         {
  54                 mount -t mini_fo -o base=/,sto=$1 $1 /mnt 2>&- && root=/mnt
  55         } || {
  56                 [ "$3" = "1" ] && mount -o bind $1 $1 && dupe $1 $rom
  57         }
  58         pivot $root $2
  59 }
  60
  61 ramoverlay() {
  62         mkdir -p /tmp/root
  63         fopivot /tmp/root /rom 1
  64 }
  65
  66 [ "${0##*/}" = "firstboot" ] && {
  67         [ -z "$rom" ] && {
  68                 echo "You do not have a squashfs partition; aborting"
  69                 echo "(firstboot cannot be run on jffs2 based firmwares)"
  70                 exit 1
  71         }
  72
  73         [ "$1" = "switch2jffs" ] && {
  74                 mtd erase OpenWrt
  75                 mount -o remount,ro none / 2>&- # try to avoid fs changing while copying
  76                 mount -o bind /tmp/root /mnt
  77                 mount /dev/mtdblock/4 /rom/jffs -t jffs2
  78                 echo -n "copying files ... "
  79                 cp -a /mnt/* /rom/jffs
  80                 umount /mnt
  81                 echo "done"
  82                 pivot /rom /mnt
  83                 mount -o move /mnt /tmp/root
  84                 fopivot /jffs /rom
  85                 umount /tmp/root 2>&-
  86                 jffs2root --clean
  87                 exit 0
  88         }
  89
  90         # script run manually
  91         [ \! -z "$jffs" ] && {
  92                 echo "firstboot has already been run"
  93                 echo "jffs2 partition is mounted, only resetting files"
  94                 dupe $jffs $rom
  95                 exit 0
  96         }
  97
  98         mtd erase OpenWrt
  99         mountdp /dev/mtdblock/4 /jffs -t jffs2
 100 }