package/base-files/files/lib/upgrade/common.sh

   1 #!/bin/sh
   2
   3 RAM_ROOT=/tmp/root
   4
   5 [ -x /usr/bin/ldd ] || ldd() { LD_TRACE_LOADED_OBJECTS=1 $*; }
   6 libs() { ldd $* 2>/dev/null | sed -r 's/(.* => )?(.*) .*/\2/'; }
   7
   8 install_file() { # <file> [ <file> ... ]
   9         for file in "$@"; 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 supivot() { # <new_root> <old_root>
  34         /bin/mount | grep "on $1 type" 2>&- 1>&- || /bin/mount -o bind $1 $1
  35         mkdir -p $1$2 $1/proc $1/sys $1/dev $1/tmp $1/overlay && \
  36         /bin/mount -o noatime,move /proc $1/proc && \
  37         pivot_root $1 $1$2 || {
  38                 /bin/umount -l $1 $1
  39                 return 1
  40         }
  41
  42         /bin/mount -o noatime,move $2/sys /sys
  43         /bin/mount -o noatime,move $2/dev /dev
  44         /bin/mount -o noatime,move $2/tmp /tmp
  45         /bin/mount -o noatime,move $2/overlay /overlay 2>&-
  46         return 0
  47 }
  48
  49 run_ramfs() { # <command> [...]
  50         install_bin /bin/busybox /bin/ash /bin/sh /bin/mount /bin/umount        \
  51                 /sbin/pivot_root /sbin/reboot /bin/sync /bin/dd /bin/grep       \
  52                 /bin/cp /bin/mv /bin/tar /usr/bin/md5sum "/usr/bin/[" /bin/dd   \
  53                 /bin/vi /bin/ls /bin/cat /usr/bin/awk /usr/bin/hexdump          \
  54                 /bin/sleep /bin/zcat /usr/bin/bzcat /usr/bin/printf /usr/bin/wc \
  55                 /bin/cut /usr/bin/printf /bin/sync /bin/mkdir /bin/rmdir        \
  56                 /bin/rm /usr/bin/basename /bin/kill /bin/chmod /usr/bin/find
  57
  58         install_bin /bin/uclient-fetch /bin/wget
  59         install_bin /sbin/mtd
  60         install_bin /sbin/mount_root
  61         install_bin /sbin/snapshot
  62         install_bin /sbin/snapshot_tool
  63         install_bin /usr/sbin/ubiupdatevol
  64         install_bin /usr/sbin/ubiattach
  65         install_bin /usr/sbin/ubiblock
  66         install_bin /usr/sbin/ubiformat
  67         install_bin /usr/sbin/ubidetach
  68         install_bin /usr/sbin/ubirsvol
  69         install_bin /usr/sbin/ubirmvol
  70         install_bin /usr/sbin/ubimkvol
  71         install_bin /usr/sbin/partx
  72         install_bin /usr/sbin/losetup
  73         install_bin /usr/sbin/mkfs.ext4
  74         for file in $RAMFS_COPY_BIN; do
  75                 install_bin ${file//:/ }
  76         done
  77         install_file /etc/resolv.conf /lib/*.sh /lib/functions/*.sh /lib/upgrade/*.sh $RAMFS_COPY_DATA
  78
  79         [ -L "/lib64" ] && ln -s /lib $RAM_ROOT/lib64
  80
  81         supivot $RAM_ROOT /mnt || {
  82                 echo "Failed to switch over to ramfs. Please reboot."
  83                 exit 1
  84         }
  85
  86         /bin/mount -o remount,ro /mnt
  87         /bin/umount -l /mnt
  88
  89         grep /overlay /proc/mounts > /dev/null && {
  90                 /bin/mount -o noatime,remount,ro /overlay
  91                 /bin/umount -l /overlay
  92         }
  93
  94         # spawn a new shell from ramdisk to reduce the probability of cache issues
  95         exec /bin/busybox ash -c "$*"
  96 }
  97
  98 kill_remaining() { # [ <signal> ]
  99         local sig="${1:-TERM}"
 100         echo -n "Sending $sig to remaining processes ... "
 101
 102         local my_pid=$$
 103         local my_ppid=$(cut -d' ' -f4  /proc/$my_pid/stat)
 104         local my_ppisupgraded=
 105         grep -q upgraded /proc/$my_ppid/cmdline >/dev/null && {
 106                 local my_ppisupgraded=1
 107         }
 108
 109         local stat
 110         for stat in /proc/[0-9]*/stat; do
 111                 [ -f "$stat" ] || continue
 112
 113                 local pid name state ppid rest
 114                 read pid name state ppid rest < $stat
 115                 name="${name#(}"; name="${name%)}"
 116
 117                 local cmdline
 118                 read cmdline < /proc/$pid/cmdline
 119
 120                 # Skip kernel threads
 121                 [ -n "$cmdline" ] || continue
 122
 123                 if [ $$ -eq 1 ] || [ $my_ppid -eq 1 ] && [ -n "$my_ppisupgraded" ]; then
 124                         # Running as init process, kill everything except me
 125                         if [ $pid -ne $$ ] && [ $pid -ne $my_ppid ]; then
 126                                 echo -n "$name "
 127                                 kill -$sig $pid 2>/dev/null
 128                         fi
 129                 else
 130                         case "$name" in
 131                                 # Skip essential services
 132                                 *procd*|*ash*|*init*|*watchdog*|*ssh*|*dropbear*|*telnet*|*login*|*hostapd*|*wpa_supplicant*|*nas*|*relayd*) : ;;
 133
 134                                 # Killable process
 135                                 *)
 136                                         if [ $pid -ne $$ ] && [ $ppid -ne $$ ]; then
 137                                                 echo -n "$name "
 138                                                 kill -$sig $pid 2>/dev/null
 139                                         fi
 140                                 ;;
 141                         esac
 142                 fi
 143         done
 144         echo ""
 145 }
 146
 147 run_hooks() {
 148         local arg="$1"; shift
 149         for func in "$@"; do
 150                 eval "$func $arg"
 151         done
 152 }
 153
 154 ask_bool() {
 155         local default="$1"; shift;
 156         local answer="$default"
 157
 158         [ "$INTERACTIVE" -eq 1 ] && {
 159                 case "$default" in
 160                         0) echo -n "$* (y/N): ";;
 161                         *) echo -n "$* (Y/n): ";;
 162                 esac
 163                 read answer
 164                 case "$answer" in
 165                         y*) answer=1;;
 166                         n*) answer=0;;
 167                         *) answer="$default";;
 168                 esac
 169         }
 170         [ "$answer" -gt 0 ]
 171 }
 172
 173 v() {
 174         [ "$VERBOSE" -ge 1 ] && echo "$@"
 175 }
 176
 177 rootfs_type() {
 178         /bin/mount | awk '($3 ~ /^\/$/) && ($5 !~ /rootfs/) { print $5 }'
 179 }
 180
 181 get_image() { # <source> [ <command> ]
 182         local from="$1"
 183         local conc="$2"
 184         local cmd
 185
 186         case "$from" in
 187                 http://*|ftp://*) cmd="wget -O- -q";;
 188                 *) cmd="cat";;
 189         esac
 190         if [ -z "$conc" ]; then
 191                 local magic="$(eval $cmd \"$from\" 2>/dev/null | dd bs=2 count=1 2>/dev/null | hexdump -n 2 -e '1/1 "%02x"')"
 192                 case "$magic" in
 193                         1f8b) conc="zcat";;
 194                         425a) conc="bzcat";;
 195                 esac
 196         fi
 197
 198         eval "$cmd \"$from\" 2>/dev/null ${conc:+| $conc}"
 199 }
 200
 201 get_magic_word() {
 202         (get_image "$@" | dd bs=2 count=1 | hexdump -v -n 2 -e '1/1 "%02x"') 2>/dev/null
 203 }
 204
 205 get_magic_long() {
 206         (get_image "$@" | dd bs=4 count=1 | hexdump -v -n 4 -e '1/1 "%02x"') 2>/dev/null
 207 }
 208
 209 jffs2_copy_config() {
 210         if grep rootfs_data /proc/mtd >/dev/null; then
 211                 # squashfs+jffs2
 212                 mtd -e rootfs_data jffs2write "$CONF_TAR" rootfs_data
 213         else
 214                 # jffs2
 215                 mtd jffs2write "$CONF_TAR" rootfs
 216         fi
 217 }
 218
 219 # Flash firmware to MTD partition
 220 #
 221 # $(1): path to image
 222 # $(2): (optional) pipe command to extract firmware, e.g. dd bs=n skip=m
 223 default_do_upgrade() {
 224         sync
 225         if [ "$SAVE_CONFIG" -eq 1 ]; then
 226                 get_image "$1" "$2" | mtd $MTD_CONFIG_ARGS -j "$CONF_TAR" write - "${PART_NAME:-image}"
 227         else
 228                 get_image "$1" "$2" | mtd write - "${PART_NAME:-image}"
 229         fi
 230 }
 231
 232 do_upgrade() {
 233         v "Performing system upgrade..."
 234         if type 'platform_do_upgrade' >/dev/null 2>/dev/null; then
 235                 platform_do_upgrade "$ARGV"
 236         else
 237                 default_do_upgrade "$ARGV"
 238         fi
 239
 240         if [ "$SAVE_CONFIG" -eq 1 ] && type 'platform_copy_config' >/dev/null 2>/dev/null; then
 241                 platform_copy_config
 242         fi
 243
 244         v "Upgrade completed"
 245         [ -n "$DELAY" ] && sleep "$DELAY"
 246         ask_bool 1 "Reboot" && {
 247                 v "Rebooting system..."
 248                 umount -a
 249                 reboot -f
 250                 sleep 5
 251                 echo b 2>/dev/null >/proc/sysrq-trigger
 252         }
 253 }