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[openwrt.git] / package / base-files / files / bin / firstboot
1 #!/bin/sh
2 # $Id: firstboot 5544 2006-11-17 03:07:10Z nbd $
3 . /etc/functions.sh
4
5 partname="rootfs_data"
6 mtdpart="$(find_mtd_part $partname)"
7
8 rom=$(awk '/squashfs/ {print $2}' /proc/mounts)
9 jffs=$(awk '/jffs2/ {print $2}' /proc/mounts)
10
11 dupe() { # <new_root> <old_root>
12 cd $1
13 echo -n "creating directories... "
14 {
15 cd $2
16 find . -xdev -type d
17 echo "./dev ./jffs ./mnt ./proc ./tmp"
18 # xdev skips mounted directories
19 cd $1
20 } | xargs mkdir -p
21 echo "done"
22
23 echo -n "setting up symlinks... "
24 for file in $(cd $2; find . -xdev -type f;); do
25 case "$file" in
26 ./rom/note) ;; #nothing
27 ./etc/config*|\
28 ./usr/lib/ipkg/info/*) cp -af $2/$file $file;;
29 *) ln -sf /rom/${file#./*} $file;;
30 esac
31 done
32 for file in $(cd $2; find . -xdev -type l;); do
33 cp -af $2/${file#./*} $file
34 done
35 echo "done"
36 }
37
38 pivot() { # <new_root> <old_root>
39 mount -o move /proc $1/proc && \
40 pivot_root $1 $1$2 && {
41 mount -o move $2/dev /dev
42 mount -o move $2/tmp /tmp
43 mount -o move $2/sys /sys 2>&-
44 mount -o move $2/jffs /jffs 2>&-
45 return 0
46 }
47 }
48
49 fopivot() { # <rw_root> <ro_root> <dupe?>
50 root=$1
51 {
52 mount -t mini_fo -o base=/,sto=$1 $1 /mnt 2>&- && root=/mnt
53 } || {
54 [ "$3" = "1" ] && {
55 mount | grep "on $1 type" 2>&- 1>&- || mount -o bind $1 $1
56 dupe $1 $rom
57 }
58 }
59 pivot $root $2
60 }
61
62 ramoverlay() {
63 mkdir -p /tmp/root
64 fopivot /tmp/root /rom 1
65 }
66
67 # invoked as an executable
68 [ "${0##*/}" = "firstboot" ] && {
69
70 [ -z "$mtdpart" ] && {
71 echo "MTD partition not found."
72 exit 1
73 }
74
75 [ -z "$rom" ] && {
76 echo "You do not have a squashfs partition; aborting"
77 echo "(firstboot cannot be run on jffs2 based firmwares)"
78 exit 1
79 }
80
81 [ "$1" = "switch2jffs" ] && {
82 mount "$mtdpart" /rom/jffs -t jffs2 || exit
83
84 # try to avoid fs changing while copying
85 mount -o remount,ro none / 2>&-
86
87 # copy ramoverlay to jffs2
88 echo -n "copying files ... "
89 cp -a /tmp/root/* /rom/jffs 2>&-
90 echo "done"
91
92 # switch back to squashfs (temporarily)
93 # and park the ramdisk ontop of /tmp/root
94 pivot /rom /mnt
95 mount -o move /mnt /tmp/root
96
97 # /jffs is the overlay
98 # /rom is the readonly
99 fopivot /jffs /rom
100
101 # try to get rid of /tmp/root
102 # this will almost always fail
103 umount /tmp/root 2>&-
104
105 exit 0
106 }
107
108 # script run manually
109 [ \! -z "$jffs" ] && {
110 echo "firstboot has already been run"
111 echo "jffs2 partition is mounted, only resetting files"
112 grep mini_fo /proc/filesystems >&-
113 [ $? != 0 ] && {
114 dupe $jffs $rom
115 exit 0
116 } || {
117 rm -rf $jffs/* 2>&-
118 mount -o remount $jffs / 2>&-
119 exit 0
120 }
121 }
122
123 mtd erase "$partname"
124 mount "$mtdpart" /jffs -t jffs2
125 fopivot /jffs /rom 1
126 }
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