blob: 6122ae7712085015c8cdac3666c259ea187c4918 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
|
#!/bin/sh
RAM_ROOT=/tmp/root
ldd() { LD_TRACE_LOADED_OBJECTS=1 $*; }
libs() { ldd $* | awk '{print $3}'; }
install_file() { # <file> [ <file> ... ]
for file in "$@"; do
dest="$RAM_ROOT/$file"
[ -f $file -a ! -f $dest ] && {
dir="$(dirname $dest)"
mkdir -p "$dir"
cp $file $dest
}
done
}
install_bin() { # <file> [ <symlink> ... ]
src=$1
files=$1
[ -x "$src" ] && files="$src $(libs $src)"
install_file $files
[ -e /lib/ld.so.1 ] && {
install_file /lib/ld.so.1
}
shift
for link in "$@"; do {
dest="$RAM_ROOT/$link"
dir="$(dirname $dest)"
mkdir -p "$dir"
[ -f "$dest" ] || ln -s $src $dest
}; done
}
supivot() { # <new_root> <old_root>
mount | grep "on $1 type" 2>&- 1>&- || mount -o bind $1 $1
mkdir -p $1$2 $1/proc $1/sys $1/dev $1/tmp $1/overlay && \
mount -o noatime,move /proc $1/proc && \
pivot_root $1 $1$2 || {
umount -l $1 $1
return 1
}
mount -o noatime,move $2/sys /sys
mount -o noatime,move $2/dev /dev
mount -o noatime,move $2/tmp /tmp
mount -o noatime,move $2/overlay /overlay 2>&-
return 0
}
run_ramfs() { # <command> [...]
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 /usr/bin/bzcat /usr/bin/printf /usr/bin/wc
install_bin /sbin/mtd
for file in $RAMFS_COPY_BIN; do
install_bin $file
done
install_file /etc/resolv.conf /lib/functions.sh /lib/functions.sh /lib/upgrade/*.sh $RAMFS_COPY_DATA
supivot $RAM_ROOT /mnt || {
echo "Failed to switch over to ramfs. Please reboot."
exit 1
}
mount -o remount,ro /mnt
umount -l /mnt
grep /overlay /proc/mounts > /dev/null && {
mount -o noatime,remount,ro /overlay
umount -l /overlay
}
# spawn a new shell from ramdisk to reduce the probability of cache issues
exec /bin/busybox ash -c "$*"
}
kill_remaining() { # [ <signal> ]
local sig="${1:-TERM}"
echo -n "Sending $sig to remaining processes ... "
local stat
for stat in /proc/[0-9]*/stat; do
[ -f "$stat" ] || continue
local pid name state ppid rest
read pid name state ppid rest < $stat
name="${name#(}"; name="${name%)}"
local cmdline
read cmdline < /proc/$pid/cmdline
# Skip kernel threads
[ -n "$cmdline" ] || continue
case "$name" in
# Skip essential services
*procd*|*ash*|*init*|*watchdog*|*ssh*|*dropbear*|*telnet*|*login*|*hostapd*|*wpa_supplicant*|*nas*) : ;;
# Killable process
*)
if [ $pid -ne $$ ] && [ $ppid -ne $$ ]; then
echo -n "$name "
kill -$sig $pid 2>/dev/null
fi
;;
esac
done
echo ""
}
run_hooks() {
local arg="$1"; shift
for func in "$@"; do
eval "$func $arg"
done
}
ask_bool() {
local default="$1"; shift;
local answer="$default"
[ "$INTERACTIVE" -eq 1 ] && {
case "$default" in
0) echo -n "$* (y/N): ";;
*) echo -n "$* (Y/n): ";;
esac
read answer
case "$answer" in
y*) answer=1;;
n*) answer=0;;
*) answer="$default";;
esac
}
[ "$answer" -gt 0 ]
}
v() {
[ "$VERBOSE" -ge 1 ] && echo "$@"
}
rootfs_type() {
mount | awk '($3 ~ /^\/$/) && ($5 !~ /rootfs/) { print $5 }'
}
get_image() { # <source> [ <command> ]
local from="$1"
local conc="$2"
local cmd
case "$from" in
http://*|ftp://*) cmd="wget -O- -q";;
*) cmd="cat";;
esac
if [ -z "$conc" ]; then
local magic="$(eval $cmd $from 2>/dev/null | dd bs=2 count=1 2>/dev/null | hexdump -n 2 -e '1/1 "%02x"')"
case "$magic" in
1f8b) conc="zcat";;
425a) conc="bzcat";;
esac
fi
eval "$cmd $from 2>/dev/null ${conc:+| $conc}"
}
get_magic_word() {
get_image "$@" | dd bs=2 count=1 2>/dev/null | hexdump -v -n 2 -e '1/1 "%02x"'
}
get_magic_long() {
get_image "$@" | dd bs=4 count=1 2>/dev/null | hexdump -v -n 4 -e '1/1 "%02x"'
}
jffs2_copy_config() {
if grep rootfs_data /proc/mtd >/dev/null; then
# squashfs+jffs2
mtd -e rootfs_data jffs2write "$CONF_TAR" rootfs_data
else
# jffs2
mtd jffs2write "$CONF_TAR" rootfs
fi
}
default_do_upgrade() {
sync
if [ "$SAVE_CONFIG" -eq 1 ]; then
get_image "$1" | mtd $MTD_CONFIG_ARGS -j "$CONF_TAR" write - "${PART_NAME:-image}"
else
get_image "$1" | mtd write - "${PART_NAME:-image}"
fi
}
do_upgrade() {
v "Performing system upgrade..."
if type 'platform_do_upgrade' >/dev/null 2>/dev/null; then
platform_do_upgrade "$ARGV"
else
default_do_upgrade "$ARGV"
fi
if [ "$SAVE_CONFIG" -eq 1 ] && type 'platform_copy_config' >/dev/null 2>/dev/null; then
platform_copy_config
fi
v "Upgrade completed"
[ -n "$DELAY" ] && sleep "$DELAY"
ask_bool 1 "Reboot" && {
v "Rebooting system..."
reboot -f
sleep 5
echo b 2>/dev/null >/proc/sysrq-trigger
}
}
|
