91e61ba4f8bc0c89b506394e14807ad4a86fd3c2
[openwrt.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 $files
24         [ -e /lib/ld.so.1 ] && {
25                 install_file /lib/ld.so.1
26         }
27         shift
28         for link in "$@"; do {
29                 dest="$RAM_ROOT/$link"
30                 dir="$(dirname $dest)"
31                 mkdir -p "$dir"
32                 [ -f "$dest" ] || ln -s $src $dest
33         }; done
34 }
35
36 supivot() { # <new_root> <old_root>
37         /bin/mount | grep "on $1 type" 2>&- 1>&- || /bin/mount -o bind $1 $1
38         mkdir -p $1$2 $1/proc $1/sys $1/dev $1/tmp $1/overlay && \
39         /bin/mount -o noatime,move /proc $1/proc && \
40         pivot_root $1 $1$2 || {
41                 /bin/umount -l $1 $1
42                 return 1
43         }
44
45         /bin/mount -o noatime,move $2/sys /sys
46         /bin/mount -o noatime,move $2/dev /dev
47         /bin/mount -o noatime,move $2/tmp /tmp
48         /bin/mount -o noatime,move $2/overlay /overlay 2>&-
49         return 0
50 }
51
52 run_ramfs() { # <command> [...]
53         install_bin /bin/busybox /bin/ash /bin/sh /bin/mount /bin/umount        \
54                 /sbin/pivot_root /usr/bin/wget /sbin/reboot /bin/sync /bin/dd   \
55                 /bin/grep /bin/cp /bin/mv /bin/tar /usr/bin/md5sum "/usr/bin/[" \
56                 /bin/dd /bin/vi /bin/ls /bin/cat /usr/bin/awk /usr/bin/hexdump  \
57                 /bin/sleep /bin/zcat /usr/bin/bzcat /usr/bin/printf /usr/bin/wc \
58                 /bin/cut /usr/bin/printf /bin/sync /bin/mkdir /bin/rmdir        \
59                 /bin/rm /usr/bin/basename /bin/kill /bin/chmod
60
61         install_bin /sbin/mtd
62         install_bin /sbin/ubi
63         install_bin /sbin/mount_root
64         install_bin /sbin/snapshot
65         install_bin /sbin/snapshot_tool
66         install_bin /usr/sbin/ubiupdatevol
67         install_bin /usr/sbin/ubiattach
68         install_bin /usr/sbin/ubiblock
69         install_bin /usr/sbin/ubiformat
70         install_bin /usr/sbin/ubidetach
71         install_bin /usr/sbin/ubirsvol
72         install_bin /usr/sbin/ubirmvol
73         install_bin /usr/sbin/ubimkvol
74         for file in $RAMFS_COPY_BIN; do
75                 install_bin ${file//:/ }
76         done
77         install_file /etc/resolv.conf /lib/functions.sh /lib/functions/*.sh /lib/upgrade/*.sh $RAMFS_COPY_DATA
78
79         supivot $RAM_ROOT /mnt || {
80                 echo "Failed to switch over to ramfs. Please reboot."
81                 exit 1
82         }
83
84         /bin/mount -o remount,ro /mnt
85         /bin/umount -l /mnt
86
87         grep /overlay /proc/mounts > /dev/null && {
88                 /bin/mount -o noatime,remount,ro /overlay
89                 /bin/umount -l /overlay
90         }
91
92         # spawn a new shell from ramdisk to reduce the probability of cache issues
93         exec /bin/busybox ash -c "$*"
94 }
95
96 kill_remaining() { # [ <signal> ]
97         local sig="${1:-TERM}"
98         echo -n "Sending $sig to remaining processes ... "
99
100         local stat
101         for stat in /proc/[0-9]*/stat; do
102                 [ -f "$stat" ] || continue
103
104                 local pid name state ppid rest
105                 read pid name state ppid rest < $stat
106                 name="${name#(}"; name="${name%)}"
107
108                 local cmdline
109                 read cmdline < /proc/$pid/cmdline
110
111                 # Skip kernel threads
112                 [ -n "$cmdline" ] || continue
113
114                 case "$name" in
115                         # Skip essential services
116                         *procd*|*ash*|*init*|*watchdog*|*ssh*|*dropbear*|*telnet*|*login*|*hostapd*|*wpa_supplicant*|*nas*) : ;;
117
118                         # Killable process
119                         *)
120                                 if [ $pid -ne $$ ] && [ $ppid -ne $$ ]; then
121                                         echo -n "$name "
122                                         kill -$sig $pid 2>/dev/null
123                                 fi
124                         ;;
125                 esac
126         done
127         echo ""
128 }
129
130 run_hooks() {
131         local arg="$1"; shift
132         for func in "$@"; do
133                 eval "$func $arg"
134         done
135 }
136
137 ask_bool() {
138         local default="$1"; shift;
139         local answer="$default"
140
141         [ "$INTERACTIVE" -eq 1 ] && {
142                 case "$default" in
143                         0) echo -n "$* (y/N): ";;
144                         *) echo -n "$* (Y/n): ";;
145                 esac
146                 read answer
147                 case "$answer" in
148                         y*) answer=1;;
149                         n*) answer=0;;
150                         *) answer="$default";;
151                 esac
152         }
153         [ "$answer" -gt 0 ]
154 }
155
156 v() {
157         [ "$VERBOSE" -ge 1 ] && echo "$@"
158 }
159
160 rootfs_type() {
161         /bin/mount | awk '($3 ~ /^\/$/) && ($5 !~ /rootfs/) { print $5 }'
162 }
163
164 get_image() { # <source> [ <command> ]
165         local from="$1"
166         local conc="$2"
167         local cmd
168
169         case "$from" in
170                 http://*|ftp://*) cmd="wget -O- -q";;
171                 *) cmd="cat";;
172         esac
173         if [ -z "$conc" ]; then
174                 local magic="$(eval $cmd $from 2>/dev/null | dd bs=2 count=1 2>/dev/null | hexdump -n 2 -e '1/1 "%02x"')"
175                 case "$magic" in
176                         1f8b) conc="zcat";;
177                         425a) conc="bzcat";;
178                 esac
179         fi
180
181         eval "$cmd $from 2>/dev/null ${conc:+| $conc}"
182 }
183
184 get_magic_word() {
185         (get_image "$@" | dd bs=2 count=1 | hexdump -v -n 2 -e '1/1 "%02x"') 2>/dev/null
186 }
187
188 get_magic_long() {
189         (get_image "$@" | dd bs=4 count=1 | hexdump -v -n 4 -e '1/1 "%02x"') 2>/dev/null
190 }
191
192 jffs2_copy_config() {
193         if grep rootfs_data /proc/mtd >/dev/null; then
194                 # squashfs+jffs2
195                 mtd -e rootfs_data jffs2write "$CONF_TAR" rootfs_data
196         else
197                 # jffs2
198                 mtd jffs2write "$CONF_TAR" rootfs
199         fi
200 }
201
202 default_do_upgrade() {
203         sync
204         if [ "$SAVE_CONFIG" -eq 1 ]; then
205                 get_image "$1" | mtd $MTD_CONFIG_ARGS -j "$CONF_TAR" write - "${PART_NAME:-image}"
206         else
207                 get_image "$1" | mtd write - "${PART_NAME:-image}"
208         fi
209 }
210
211 do_upgrade() {
212         v "Performing system upgrade..."
213         if type 'platform_do_upgrade' >/dev/null 2>/dev/null; then
214                 platform_do_upgrade "$ARGV"
215         else
216                 default_do_upgrade "$ARGV"
217         fi
218
219         if [ "$SAVE_CONFIG" -eq 1 ] && type 'platform_copy_config' >/dev/null 2>/dev/null; then
220                 platform_copy_config
221         fi
222
223         v "Upgrade completed"
224         [ -n "$DELAY" ] && sleep "$DELAY"
225         ask_bool 1 "Reboot" && {
226                 v "Rebooting system..."
227                 reboot -f
228                 sleep 5
229                 echo b 2>/dev/null >/proc/sysrq-trigger
230         }
231 }