base-files: move firstboot to /sbin

[openwrt/svn-archive/archive.git] / package / base-files / files / sbin / firstboot

diff --git a/package/base-files/files/sbin/firstboot b/package/base-files/files/sbin/firstboot
new file mode 100755 (executable)
index 0000000..8453b30
--- /dev/null
+++ b/package/base-files/files/sbin/firstboot
@@ -0,0 +1,125 @@
+#!/bin/sh
+. /etc/functions.sh
+
+partname="rootfs_data"
+mtdpart="$(find_mtd_part $partname)"
+
+rom=$(awk '/squashfs/ {print $2}' /proc/mounts)
+jffs=$(awk '/jffs2/ {print $2}' /proc/mounts)
+
+dupe() { # <new_root> <old_root>
+       cd $1
+       echo -n "creating directories... "
+       {
+               cd $2 
+               find . -xdev -type d
+               echo "./dev ./jffs ./mnt ./proc ./tmp"
+               # xdev skips mounted directories
+               cd $1 
+       } | xargs mkdir -p
+       echo "done"
+
+       echo -n "setting up symlinks... "
+       for file in $(cd $2; find . -xdev -type f;); do
+               case "$file" in
+               ./rom/note) ;; #nothing
+               ./etc/config*|\
+               ./usr/lib/opkg/info/*) cp -af $2/$file $file;;
+               *) ln -sf /rom/${file#./*} $file;;
+               esac
+       done
+       for file in $(cd $2; find . -xdev -type l;); do
+               cp -af $2/${file#./*} $file
+       done
+       echo "done"
+}
+
+pivot() { # <new_root> <old_root>
+       mount -o move /proc $1/proc && \
+       pivot_root $1 $1$2 && {
+               mount -o move $2/dev /dev
+               mount -o move $2/tmp /tmp
+               mount -o move $2/sys /sys 2>&-
+               mount -o move $2/jffs /jffs 2>&-
+               return 0
+       }
+}
+
+fopivot() { # <rw_root> <ro_root> <dupe?>
+       root=$1
+       {
+               mount -t mini_fo -o base=/,sto=$1 "mini_fo:$1" /mnt 2>&- && root=/mnt
+       } || {
+               [ "$3" = "1" ] && {
+               mount | grep "on $1 type" 2>&- 1>&- || mount -o bind $1 $1
+               dupe $1 $rom
+               }
+       }
+       pivot $root $2
+}
+
+ramoverlay() {
+       mkdir -p /tmp/root
+       fopivot /tmp/root /rom 1
+}
+
+# invoked as an executable
+[ "${0##*/}" = "firstboot" ] && {
+
+       [ -z "$mtdpart" ] && {
+               echo "MTD partition not found."
+               exit 1
+       }
+
+       [ -z "$rom" ] && {
+               echo "You do not have a squashfs partition; aborting"
+               echo "(firstboot cannot be run on jffs2 based firmwares)"
+               exit 1
+       }
+
+       [ "$1" = "switch2jffs" ] && {
+               mount "$mtdpart" /rom/jffs -t jffs2 || exit
+
+               # try to avoid fs changing while copying
+               mount -o remount,ro none / 2>&-
+
+               # copy ramoverlay to jffs2
+               echo -n "copying files ... "
+               cp -a /tmp/root/* /rom/jffs 2>&-
+               echo "done"
+
+               # switch back to squashfs (temporarily)
+               # and park the ramdisk ontop of /tmp/root
+               pivot /rom /mnt
+               mount -o move /mnt /tmp/root
+
+               # /jffs is the overlay
+               # /rom is the readonly
+               fopivot /jffs /rom
+
+               # try to get rid of /tmp/root
+               # this will almost always fail
+               umount /tmp/root 2>&-
+
+               exit 0
+       }
+
+       # script run manually
+       [ \! -z "$jffs" ] && {
+               echo "firstboot has already been run"
+               echo "jffs2 partition is mounted, only resetting files"
+               grep mini_fo /proc/filesystems >&-
+               [ $? != 0 ] && {
+                       dupe $jffs $rom
+                       exit 0
+               } || { 
+                       rm -rf $jffs/* 2>&-
+                       mount -o remount $jffs / 2>&-
+                       exit 0
+               }
+       }
+
+       mtd erase "$partname"
+       mount "$mtdpart" /jffs -t jffs2
+       fopivot /jffs /rom 1
+}