[8.09] merge r16488
[openwrt/svn-archive/archive.git] / package / base-files / files / lib / upgrade / common.sh
1 #!/bin/sh
2
3 RAM_ROOT=/tmp/root
4
5 ldd() { LD_TRACE_LOADED_OBJECTS=1 $*; }
6 libs() { ldd $* | awk '{print $3}'; }
7
8 install_file() { # <file> [ <file> ... ]
9 for file in "$@"; do
10 dest="$RAM_ROOT/$file"
11 [ -f $file -a ! -f $dest ] && {
12 dir="$(dirname $dest)"
13 mkdir -p "$dir"
14 cp $file $dest
15 }
16 done
17 }
18
19 install_bin() { # <file> [ <symlink> ... ]
20 src=$1
21 files=$1
22 [ -x "$src" ] && files="$src $(libs $src)"
23 install_file $files
24 shift
25 for link in "$@"; do {
26 dest="$RAM_ROOT/$link"
27 dir="$(dirname $dest)"
28 mkdir -p "$dir"
29 [ -f "$dest" ] || ln -s $src $dest
30 }; done
31 }
32
33 pivot() { # <new_root> <old_root>
34 mount | grep "on $1 type" 2>&- 1>&- || mount -o bind $1 $1
35 mkdir -p $1$2 $1/proc $1/dev $1/tmp $1/jffs && \
36 mount -o move /proc $1/proc && \
37 pivot_root $1 $1$2 || {
38 umount $1 $1
39 return 1
40 }
41 mount -o move $2/dev /dev
42 mount -o move $2/tmp /tmp
43 mount -o move $2/jffs /jffs 2>&-
44 return 0
45 }
46
47 run_ramfs() { # <command> [...]
48 install_bin /bin/busybox /bin/ash /bin/sh /bin/mount /bin/umount /sbin/pivot_root /usr/bin/wget /sbin/reboot /bin/sync /bin/dd /bin/grep /bin/cp /bin/mv /bin/tar /usr/bin/md5sum "/usr/bin/[" /bin/vi /bin/ls /bin/cat /usr/bin/awk /usr/bin/hexdump /bin/sleep /bin/zcat
49 install_bin /sbin/mtd
50 for file in $RAMFS_COPY_BIN; do
51 install_bin $file
52 done
53 install_file /etc/resolv.conf /etc/functions.sh /lib/upgrade/*.sh $RAMFS_COPY_DATA
54
55 pivot $RAM_ROOT /mnt || {
56 echo "Failed to switch over to ramfs. Please reboot."
57 exit 1
58 }
59
60 mount -o remount,ro /mnt
61 umount -l /mnt
62
63 grep /jffs /proc/mounts > /dev/null && {
64 mount -o remount,ro /jffs
65 umount -l /jffs
66 }
67
68 # spawn a new shell from ramdisk to reduce the probability of cache issues
69 exec /bin/busybox ash -c "$*"
70 }
71
72 run_hooks() {
73 local arg="$1"; shift
74 for func in "$@"; do
75 eval "$func $arg"
76 done
77 }
78
79 ask_bool() {
80 local default="$1"; shift;
81 local answer="$default"
82
83 [ "$INTERACTIVE" -eq 1 ] && {
84 case "$default" in
85 0) echo -n "$* (y/N): ";;
86 *) echo -n "$* (Y/n): ";;
87 esac
88 read answer
89 case "$answer" in
90 y*) answer=1;;
91 n*) answer=0;;
92 *) answer="$default";;
93 esac
94 }
95 [ "$answer" -gt 0 ]
96 }
97
98 v() {
99 [ "$VERBOSE" -ge 1 ] && echo "$@"
100 }
101
102 rootfs_type() {
103 mount | awk '($3 ~ /^\/$/) && ($5 !~ /rootfs/) { print $5 }'
104 }
105
106 get_image() {
107 local from="$1"
108 local conc="cat"
109
110 [ $GZIPED -eq 1 ] && conc="zcat"
111
112 case "$from" in
113 http://*|ftp://*) wget -O- -q "$from" | "$conc";;
114 *) cat "$from" | "$conc";;
115 esac
116 }
117
118 get_magic_word() {
119 get_image "$1" | dd bs=2 count=1 2>/dev/null | hexdump -C | awk '$2 { print $2 $3 }'
120 }
121
122 refresh_mtd_partitions() {
123 mtd refresh rootfs
124 }
125
126 jffs2_copy_config() {
127 if grep rootfs_data /proc/mtd >/dev/null; then
128 # squashfs+jffs2
129 mtd -e rootfs_data jffs2write "$CONF_TAR" rootfs_data
130 else
131 # jffs2
132 mtd jffs2write "$CONF_TAR" rootfs
133 fi
134 }
135
136 default_do_upgrade() {
137 sync
138 if [ "$SAVE_CONFIG" -eq 1 -a -z "$USE_REFRESH" ]; then
139 get_image "$1" | mtd -j "$CONF_TAR" write - "${PART_NAME:-image}"
140 else
141 get_image "$1" | mtd write - "${PART_NAME:-image}"
142 fi
143 }
144
145 do_upgrade() {
146 v "Performing system upgrade..."
147 if type 'platform_do_upgrade' >/dev/null 2>/dev/null; then
148 platform_do_upgrade "$ARGV"
149 else
150 default_do_upgrade "$ARGV"
151 fi
152
153 [ "$SAVE_CONFIG" -eq 1 -a -n "$USE_REFRESH" ] && {
154 v "Refreshing partitions"
155 if type 'platform_refresh_partitions' >/dev/null 2>/dev/null; then
156 platform_refresh_partitions
157 else
158 refresh_mtd_partitions
159 fi
160 if type 'platform_copy_config' >/dev/null 2>/dev/null; then
161 platform_copy_config
162 else
163 jffs2_copy_config
164 fi
165 }
166 v "Upgrade completed"
167 [ -n "$DELAY" ] && sleep "$DELAY"
168 ask_bool 1 "Reboot" && {
169 v "Rebooting system..."
170 reboot
171 sleep 5
172 echo b 2>/dev/null >/proc/sysrq-trigger
173 }
174 }