]> spindle.queued.net Git - xodist/blob - mkjffs2.sh
mkext3: fix sparse image creation
[xodist] / mkjffs2.sh
1 #!/bin/bash -e
2 #
3 # Copyright © 2008-2009  Andres Salomon <dilinger@collabora.co.uk>
4 #
5 # This file is free software; you can redistribute it and/or modify it
6 # under the terms of the GNU General Public License as published by
7 # the Free Software Foundation; either version 2 of the License, or
8 # (at your option) any later version.
9 #
10 # This program is distributed in the hope that it will be useful, but
11 # WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13 # General Public License for more details.
14 #
15 # You should have received a copy of the GNU General Public License
16 # along with this program; if not, write to the Free Software
17 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18
19 . ./functions.sh
20
21 CONFIG_TYPE=generic
22
23 usage()
24 {
25         echo "" 1>&2
26         echo "Usage: $0 [<options>] <root directory> <img>" 1>&2
27         echo "" 1>&2
28         echo "Options:" 1>&2
29         echo "  --config-type <config>    directory name in configs/ to use" 1>&2
30         echo "  --help                    display this help screen" 1>&2
31         echo "" 1>&2
32         exit 1
33 }
34
35 while test $# != 0
36 do
37         case $1 in
38         --config-type)
39                 CONFIG_TYPE=$2
40                 [ -d ./configs/${CONFIG_TYPE} ] || {
41                         echo "Error: can't find directory './configs/${CONFIG_TYPE}/'!" 1>&2
42                         exit 2
43                 }
44                 shift
45                 ;;
46         --help|-h)
47                 usage
48                 ;;
49         *)
50                 if [ "$#" != "2" ]; then
51                         echo "Unknown option $1" 1>&2
52                         usage
53                 else
54                         ROOT_DIR=$1
55                         IMG_NAME=$2
56                         shift
57                 fi
58                 ;;
59         esac
60         shift
61 done
62
63 if [ "${IMG_NAME}" == "${IMG_NAME/.img/.dat}" ]; then
64         DAT_NAME=${IMG_NAME}.dat
65 else
66         DAT_NAME=${IMG_NAME/.img/.dat}
67 fi
68
69 if [ ! -d "${ROOT_DIR}" ]; then
70         echo "" 1>&2
71         echo "*** Unable to find root directory!" 1>&2
72         usage
73 fi
74
75 check_for_cmds mkfs.jffs2 sumtool || exit 1
76
77 # create image's /etc/fstab
78 if [ ! -f ./configs/${CONFIG_TYPE}/fstab-jffs2 ]; then
79         echo "*** Unable to find fstab-jffs2!" 1>&2
80         exit 1
81 fi
82 sed 's/[[:space:]]#.*//' ./configs/${CONFIG_TYPE}/fstab-jffs2 > ${ROOT_DIR}/etc/fstab
83
84 # TODO: this needs to go into an OFW package; here it's a hack
85 # create image's /boot/olpc.fth
86 if [ -f ./configs/${CONFIG_TYPE}/olpc.fth-jffs2 ]; then
87         cp ./configs/${CONFIG_TYPE}/olpc.fth-jffs2 ${ROOT_DIR}/boot/olpc.fth
88 fi
89
90 create_jffs2()
91 {
92         root_dir="$1"
93         out="$2"
94
95         mkfs.jffs2 -n -e128KiB -r ${root_dir} -o ${out}.pre
96         sumtool -n -p -e 128KiB -i ${out}.pre -o ${out}
97         rm -f ${out}.pre
98 }
99
100 partition_map()
101 {
102         cat >${IMG_NAME}<<EOF
103 data:  ${DAT_NAME}
104 erase-all
105 EOF
106
107         # partition size map
108         printf "partitions:" >> ${IMG_NAME}
109         sed -ne 's/^mtd://p' configs/${CONFIG_TYPE}/fstab-jffs2 | \
110                         while read name mntpt fstype extra; do
111                 size=$(echo $extra | sed -ne 's/.*[[:space:]]\+#[[:space:]]\+//p')
112                 if [ "${size}" = "" ]; then
113                         size="-1"
114                 else
115                         # size in fstab is in MB; convert to 128KiB chunks (in hex)
116                         # MB * (1024/128)
117                         size=$((size * 8))
118                         size=`printf "%x\n" $size`
119                 fi
120                 printf "  $name $size" >> ${IMG_NAME}
121         done
122         printf "\n" >> ${IMG_NAME}
123
124         # individual partitions
125         sed -ne 's/^mtd://p' configs/${CONFIG_TYPE}/fstab-jffs2 | \
126                         while read name mntpt fstype extra; do
127                 cat >>${IMG_NAME}<<EOF
128 set-partition: ${name}
129 mark-pending: 0
130 EOF
131                 # sha256 summing for data
132                 eblocks=$((`stat --printf "%s\n" _${name}.img` / (128*1024)))
133                 for b in $(seq 0 $(($eblocks - 1))); do
134                         sha=$(dd status=noxfer bs=128KiB skip=$b count=1 if=_${name}.img 2>/dev/null \
135                                         | sha256sum | cut -d\  -f1)
136                         echo "eblock: `printf '%x' $b` sha256 $sha" >> ${IMG_NAME}
137                 done
138                 cat >>${IMG_NAME}<<EOF
139 cleanmarkers
140 mark-complete: 0
141 EOF
142         done
143 }
144
145 # move separate partitions out of the way
146 sed -ne 's/^mtd://p' configs/${CONFIG_TYPE}/fstab-jffs2 | \
147                 while read name mntpt fstype extra; do
148         if [ "$mntpt" = "/" ]; then
149                 continue
150         fi
151
152         mv ${ROOT_DIR}/${mntpt} "_${name}"
153         mkdir ${ROOT_DIR}/${mntpt}
154 done
155
156 # create partitions
157 sed -ne 's/^mtd://p' configs/${CONFIG_TYPE}/fstab-jffs2 | \
158                 while read name mntpt fstype extra; do
159         if [ "$mntpt" = "/" ]; then
160                 create_jffs2 ${ROOT_DIR} "_${name}.img"
161
162         else
163                 create_jffs2 "_${name}" "_${name}.img"
164         fi
165 done
166
167 # move separate partitions back into the chroot
168 sed -ne 's/^mtd://p' configs/${CONFIG_TYPE}/fstab-jffs2 | \
169                 while read name mntpt fstype extra; do
170         if [ "$mntpt" = "/" ]; then
171                 continue
172         fi
173
174         rmdir ${ROOT_DIR}/${mntpt}
175         mv "_${name}" ${ROOT_DIR}/${mntpt}
176 done
177
178 # partition map is used by OFW for partition layout and sha256 checksums
179 partition_map
180
181 # concat partitions, finish up
182 rm -f ${DAT_NAME}
183 sed -ne 's/^mtd://p' configs/${CONFIG_TYPE}/fstab-jffs2 | \
184                 while read name mntpt fstype extra; do
185         cat "_${name}.img" >> ${DAT_NAME}
186         rm -f "_${name}.img"
187 done
188
189 exit 0