5 mtdpart="$(find_mtd_part $partname)"
7 rom=$(awk '/squashfs/ {print $2}' /proc/mounts)
8 jffs=$(awk '/jffs2/ {print $2}' /proc/mounts)
10 dupe() { # <new_root> <old_root>
12 echo -n "creating directories... "
16 echo "./dev ./jffs ./mnt ./proc ./tmp"
17 # xdev skips mounted directories
22 echo -n "setting up symlinks... "
23 for file in $(cd $2; find . -xdev -type f;); do
25 ./rom/note) ;; #nothing
27 ./usr/lib/opkg/info/*) cp -af $2/$file $file;;
28 *) ln -sf /rom/${file#./*} $file;;
31 for file in $(cd $2; find . -xdev -type l;); do
32 cp -af $2/${file#./*} $file
37 pivot() { # <new_root> <old_root>
38 mount -o move /proc $1/proc && \
39 pivot_root $1 $1$2 && {
40 mount -o move $2/dev /dev
41 mount -o move $2/tmp /tmp
42 mount -o move $2/sys /sys 2>&-
43 mount -o move $2/jffs /jffs 2>&-
48 fopivot() { # <rw_root> <ro_root> <dupe?>
51 if grep -q mini_fo /proc/filesystems; then
52 mount -t mini_fo -o base=/,sto=$1 "mini_fo:$1" /mnt 2>&- && root=/mnt
55 mount --bind -o union "$1" /mnt && root=/mnt
59 mount | grep "on $1 type" 2>&- 1>&- || mount -o bind $1 $1
68 mount -t tmpfs root /tmp/root
69 fopivot /tmp/root /rom 1
72 # invoked as an executable
73 [ "${0##*/}" = "firstboot" ] && {
75 [ -z "$mtdpart" ] && {
76 echo "MTD partition not found."
81 echo "You do not have a squashfs partition; aborting"
82 echo "(firstboot cannot be run on jffs2 based firmwares)"
86 [ "$1" = "switch2jffs" ] && {
87 if grep -q mini_fo /proc/filesystems; then
88 mount "$mtdpart" /rom/jffs -t jffs2 || exit
90 # try to avoid fs changing while copying
91 mount -o remount,ro none / 2>&-
93 # copy ramoverlay to jffs2
94 echo -n "copying files ... "
95 cp -a /tmp/root/* /rom/jffs 2>&-
98 # switch back to squashfs (temporarily)
99 # and park the ramdisk ontop of /tmp/root
101 mount -o move /mnt /tmp/root
103 # /jffs is the overlay
104 # /rom is the readonly
107 # try to get rid of /tmp/root
108 # this will almost always fail
109 umount /tmp/root 2>&-
111 # switch back to squashfs temporarily
114 # get rid of the old overlay
117 # another umount to get rid of the bind from /tmp/root
121 mount "$mtdpart" /jffs -t jffs2 || exit
123 # workaround to ensure that union can attach properly
127 # switch to the new (empty) jffs2
130 # copy ramoverlay to jffs2, must be done after switching
131 # to the new rootfs to avoid creating opaque directories
132 echo -n "copying files ... "
133 cp -a /tmp/root/* / >/dev/null 2>&1
144 # script run manually
145 [ \! -z "$jffs" ] && {
146 echo "firstboot has already been run"
147 echo "jffs2 partition is mounted, only resetting files"
148 grep mini_fo /proc/filesystems >&-
154 mount -o remount $jffs / 2>&-
159 mtd erase "$partname"
160 mount "$mtdpart" /jffs -t jffs2