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 fopivot() { # <rw_root> <ro_root> <dupe?>
  45         root=$1
  46         {
  47                 mount -t mini_fo -o base=/,sto=$1 $1 /mnt 2>&- && root=/mnt
  48         } || {
  49                 [ "$3" = "1" ] && {
  50                 mount | grep "on $1 type" 2>&- 1>&- || mount -o bind $1 $1
  51                 dupe $1 $rom
  52                 }
  53         }
  54         pivot $root $2
  55 }
  56
  57 ramoverlay() {
  58         mkdir -p /tmp/root
  59         fopivot /tmp/root /rom 1
  60 }
  61
  62 # invoked as an executable
  63 [ "${0##*/}" = "firstboot" ] && {
  64
  65         [ -z "$rom" ] && {
  66                 echo "You do not have a squashfs partition; aborting"
  67                 echo "(firstboot cannot be run on jffs2 based firmwares)"
  68                 exit 1
  69         }
  70
  71         [ "$1" = "switch2jffs" ] && {
  72                 mtd erase OpenWrt
  73
  74                 # try to avoid fs changing while copying
  75                 mount -o remount,ro none / 2>&-
  76
  77                 # copy ramoverlay to jffs2
  78                 mount /dev/mtdblock/4 /rom/jffs -t jffs2
  79                 echo -n "copying files ... "
  80                 cp -a /tmp/root/* /rom/jffs 2>&-
  81                 echo "done"
  82
  83                 # switch back to squashfs (temporarily)
  84                 # and park the ramdisk ontop of /tmp/root
  85                 pivot /rom /mnt
  86                 mount -o move /mnt /tmp/root
  87
  88                 # /jffs is the overlay
  89                 # /rom is the readonly
  90                 fopivot /jffs /rom
  91
  92                 # try to get rid of /tmp/root
  93                 # this will almost always fail
  94                 umount /tmp/root 2>&-
  95
  96                 # fs is clean
  97                 jffs2root --clean
  98                 exit 0
  99         }
 100
 101         # script run manually
 102         [ \! -z "$jffs" ] && {
 103                 echo "firstboot has already been run"
 104                 echo "jffs2 partition is mounted, only resetting files"
 105                 grep mini_fo /proc/filesystems >&-
 106                 [ $? != 0 ] && {
 107                         dupe $jffs $rom
 108                         exit 0
 109                 } || {
 110                         rm -rf $jffs/* 2>&-
 111                         mount -o remount $jffs / 2>&-
 112                         exit 0
 113                 }
 114         }
 115
 116         mtd erase OpenWrt
 117         mount /dev/mtdblock/4 /jffs -t jffs2
 118         fopivot /jffs /rom 1
 119 }