base-files: don't kill nas for sysupgrade
[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 $files
24 [ -e /lib/ld.so.1 ] && {
25 install_file /lib/ld.so.1
26 }
27 shift
28 for link in "$@"; 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 mount | grep "on $1 type" 2>&- 1>&- || mount -o bind $1 $1
38 mkdir -p $1$2 $1/proc $1/sys $1/dev $1/tmp $1/overlay && \
39 mount -o noatime,move /proc $1/proc && \
40 pivot_root $1 $1$2 || {
41 umount -l $1 $1
42 return 1
43 }
44
45 mount -o noatime,move $2/sys /sys
46 mount -o noatime,move $2/dev /dev
47 mount -o noatime,move $2/tmp /tmp
48 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/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
59 install_bin /sbin/mtd
60 for file in $RAMFS_COPY_BIN; do
61 install_bin $file
62 done
63 install_file /etc/resolv.conf /lib/functions.sh /lib/functions.sh /lib/upgrade/*.sh $RAMFS_COPY_DATA
64
65 supivot $RAM_ROOT /mnt || {
66 echo "Failed to switch over to ramfs. Please reboot."
67 exit 1
68 }
69
70 mount -o remount,ro /mnt
71 umount -l /mnt
72
73 grep /overlay /proc/mounts > /dev/null && {
74 mount -o noatime,remount,ro /overlay
75 umount -l /overlay
76 }
77
78 # spawn a new shell from ramdisk to reduce the probability of cache issues
79 exec /bin/busybox ash -c "$*"
80 }
81
82 kill_remaining() { # [ <signal> ]
83 local sig="${1:-TERM}"
84 echo -n "Sending $sig to remaining processes ... "
85
86 local stat
87 for stat in /proc/[0-9]*/stat; do
88 [ -f "$stat" ] || continue
89
90 local pid name state ppid rest
91 read pid name state ppid rest < $stat
92 name="${name#(}"; name="${name%)}"
93
94 local cmdline
95 read cmdline < /proc/$pid/cmdline
96
97 # Skip kernel threads
98 [ -n "$cmdline" ] || continue
99
100 case "$name" in
101 # Skip essential services
102 *procd*|*ash*|*init*|*watchdog*|*ssh*|*dropbear*|*telnet*|*login*|*hostapd*|*wpa_supplicant*|*nas*) : ;;
103
104 # Killable process
105 *)
106 if [ $pid -ne $$ ] && [ $ppid -ne $$ ]; then
107 echo -n "$name "
108 kill -$sig $pid 2>/dev/null
109 fi
110 ;;
111 esac
112 done
113 echo ""
114 }
115
116 run_hooks() {
117 local arg="$1"; shift
118 for func in "$@"; do
119 eval "$func $arg"
120 done
121 }
122
123 ask_bool() {
124 local default="$1"; shift;
125 local answer="$default"
126
127 [ "$INTERACTIVE" -eq 1 ] && {
128 case "$default" in
129 0) echo -n "$* (y/N): ";;
130 *) echo -n "$* (Y/n): ";;
131 esac
132 read answer
133 case "$answer" in
134 y*) answer=1;;
135 n*) answer=0;;
136 *) answer="$default";;
137 esac
138 }
139 [ "$answer" -gt 0 ]
140 }
141
142 v() {
143 [ "$VERBOSE" -ge 1 ] && echo "$@"
144 }
145
146 rootfs_type() {
147 mount | awk '($3 ~ /^\/$/) && ($5 !~ /rootfs/) { print $5 }'
148 }
149
150 get_image() { # <source> [ <command> ]
151 local from="$1"
152 local conc="$2"
153 local cmd
154
155 case "$from" in
156 http://*|ftp://*) cmd="wget -O- -q";;
157 *) cmd="cat";;
158 esac
159 if [ -z "$conc" ]; then
160 local magic="$(eval $cmd $from 2>/dev/null | dd bs=2 count=1 2>/dev/null | hexdump -n 2 -e '1/1 "%02x"')"
161 case "$magic" in
162 1f8b) conc="zcat";;
163 425a) conc="bzcat";;
164 esac
165 fi
166
167 eval "$cmd $from 2>/dev/null ${conc:+| $conc}"
168 }
169
170 get_magic_word() {
171 get_image "$@" | dd bs=2 count=1 2>/dev/null | hexdump -v -n 2 -e '1/1 "%02x"'
172 }
173
174 get_magic_long() {
175 get_image "$@" | dd bs=4 count=1 2>/dev/null | hexdump -v -n 4 -e '1/1 "%02x"'
176 }
177
178 jffs2_copy_config() {
179 if grep rootfs_data /proc/mtd >/dev/null; then
180 # squashfs+jffs2
181 mtd -e rootfs_data jffs2write "$CONF_TAR" rootfs_data
182 else
183 # jffs2
184 mtd jffs2write "$CONF_TAR" rootfs
185 fi
186 }
187
188 default_do_upgrade() {
189 sync
190 if [ "$SAVE_CONFIG" -eq 1 ]; then
191 get_image "$1" | mtd -j "$CONF_TAR" write - "${PART_NAME:-image}"
192 else
193 get_image "$1" | mtd write - "${PART_NAME:-image}"
194 fi
195 }
196
197 do_upgrade() {
198 v "Performing system upgrade..."
199 if type 'platform_do_upgrade' >/dev/null 2>/dev/null; then
200 platform_do_upgrade "$ARGV"
201 else
202 default_do_upgrade "$ARGV"
203 fi
204
205 if [ "$SAVE_CONFIG" -eq 1 ] && type 'platform_copy_config' >/dev/null 2>/dev/null; then
206 platform_copy_config
207 fi
208
209 v "Upgrade completed"
210 [ -n "$DELAY" ] && sleep "$DELAY"
211 ask_bool 1 "Reboot" && {
212 v "Rebooting system..."
213 reboot -f
214 sleep 5
215 echo b 2>/dev/null >/proc/sysrq-trigger
216 }
217 }