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                 /bin/mknod
  58
  59         install_bin /bin/uclient-fetch /bin/wget
  60         install_bin /sbin/mtd
  61         install_bin /sbin/mount_root
  62         install_bin /sbin/snapshot
  63         install_bin /sbin/snapshot_tool
  64         install_bin /usr/sbin/ubiupdatevol
  65         install_bin /usr/sbin/ubiattach
  66         install_bin /usr/sbin/ubiblock
  67         install_bin /usr/sbin/ubiformat
  68         install_bin /usr/sbin/ubidetach
  69         install_bin /usr/sbin/ubirsvol
  70         install_bin /usr/sbin/ubirmvol
  71         install_bin /usr/sbin/ubimkvol
  72         install_bin /usr/sbin/partx
  73         install_bin /usr/sbin/losetup
  74         install_bin /usr/sbin/mkfs.ext4
  75         for file in $RAMFS_COPY_BIN; do
  76                 install_bin ${file//:/ }
  77         done
  78         install_file /etc/resolv.conf /lib/*.sh /lib/functions/*.sh /lib/upgrade/*.sh $RAMFS_COPY_DATA
  79
  80         [ -L "/lib64" ] && ln -s /lib $RAM_ROOT/lib64
  81
  82         supivot $RAM_ROOT /mnt || {
  83                 echo "Failed to switch over to ramfs. Please reboot."
  84                 exit 1
  85         }
  86
  87         /bin/mount -o remount,ro /mnt
  88         /bin/umount -l /mnt
  89
  90         grep /overlay /proc/mounts > /dev/null && {
  91                 /bin/mount -o noatime,remount,ro /overlay
  92                 /bin/umount -l /overlay
  93         }
  94
  95         # spawn a new shell from ramdisk to reduce the probability of cache issues
  96         exec /bin/busybox ash -c "$*"
  97 }
  98
  99 kill_remaining() { # [ <signal> ]
 100         local sig="${1:-TERM}"
 101         echo -n "Sending $sig to remaining processes ... "
 102
 103         local my_pid=$$
 104         local my_ppid=$(cut -d' ' -f4  /proc/$my_pid/stat)
 105         local my_ppisupgraded=
 106         grep -q upgraded /proc/$my_ppid/cmdline >/dev/null && {
 107                 local my_ppisupgraded=1
 108         }
 109
 110         local stat
 111         for stat in /proc/[0-9]*/stat; do
 112                 [ -f "$stat" ] || continue
 113
 114                 local pid name state ppid rest
 115                 read pid name state ppid rest < $stat
 116                 name="${name#(}"; name="${name%)}"
 117
 118                 local cmdline
 119                 read cmdline < /proc/$pid/cmdline
 120
 121                 # Skip kernel threads
 122                 [ -n "$cmdline" ] || continue
 123
 124                 if [ $$ -eq 1 ] || [ $my_ppid -eq 1 ] && [ -n "$my_ppisupgraded" ]; then
 125                         # Running as init process, kill everything except me
 126                         if [ $pid -ne $$ ] && [ $pid -ne $my_ppid ]; then
 127                                 echo -n "$name "
 128                                 kill -$sig $pid 2>/dev/null
 129                         fi
 130                 else
 131                         case "$name" in
 132                                 # Skip essential services
 133                                 *procd*|*ash*|*init*|*watchdog*|*ssh*|*dropbear*|*telnet*|*login*|*hostapd*|*wpa_supplicant*|*nas*|*relayd*) : ;;
 134
 135                                 # Killable process
 136                                 *)
 137                                         if [ $pid -ne $$ ] && [ $ppid -ne $$ ]; then
 138                                                 echo -n "$name "
 139                                                 kill -$sig $pid 2>/dev/null
 140                                         fi
 141                                 ;;
 142                         esac
 143                 fi
 144         done
 145         echo ""
 146 }
 147
 148 run_hooks() {
 149         local arg="$1"; shift
 150         for func in "$@"; do
 151                 eval "$func $arg"
 152         done
 153 }
 154
 155 ask_bool() {
 156         local default="$1"; shift;
 157         local answer="$default"
 158
 159         [ "$INTERACTIVE" -eq 1 ] && {
 160                 case "$default" in
 161                         0) echo -n "$* (y/N): ";;
 162                         *) echo -n "$* (Y/n): ";;
 163                 esac
 164                 read answer
 165                 case "$answer" in
 166                         y*) answer=1;;
 167                         n*) answer=0;;
 168                         *) answer="$default";;
 169                 esac
 170         }
 171         [ "$answer" -gt 0 ]
 172 }
 173
 174 v() {
 175         [ "$VERBOSE" -ge 1 ] && echo "$@"
 176 }
 177
 178 rootfs_type() {
 179         /bin/mount | awk '($3 ~ /^\/$/) && ($5 !~ /rootfs/) { print $5 }'
 180 }
 181
 182 get_image() { # <source> [ <command> ]
 183         local from="$1"
 184         local conc="$2"
 185         local cmd
 186
 187         case "$from" in
 188                 http://*|ftp://*) cmd="wget -O- -q";;
 189                 *) cmd="cat";;
 190         esac
 191         if [ -z "$conc" ]; then
 192                 local magic="$(eval $cmd \"$from\" 2>/dev/null | dd bs=2 count=1 2>/dev/null | hexdump -n 2 -e '1/1 "%02x"')"
 193                 case "$magic" in
 194                         1f8b) conc="zcat";;
 195                         425a) conc="bzcat";;
 196                 esac
 197         fi
 198
 199         eval "$cmd \"$from\" 2>/dev/null ${conc:+| $conc}"
 200 }
 201
 202 get_magic_word() {
 203         (get_image "$@" | dd bs=2 count=1 | hexdump -v -n 2 -e '1/1 "%02x"') 2>/dev/null
 204 }
 205
 206 get_magic_long() {
 207         (get_image "$@" | dd bs=4 count=1 | hexdump -v -n 4 -e '1/1 "%02x"') 2>/dev/null
 208 }
 209
 210 export_bootdevice() {
 211         local cmdline uuid disk uevent
 212         local MAJOR MINOR DEVNAME DEVTYPE
 213
 214         if read cmdline < /proc/cmdline; then
 215                 case "$cmdline" in
 216                         *block2mtd=*)
 217                                 disk="${cmdline##*block2mtd=}"
 218                                 disk="${disk%%,*}"
 219                         ;;
 220                         *root=*)
 221                                 disk="${cmdline##*root=}"
 222                                 disk="${disk%% *}"
 223                         ;;
 224                 esac
 225
 226                 case "$disk" in
 227                         PARTUUID=[a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9]-02)
 228                                 uuid="${disk#PARTUUID=}"
 229                                 uuid="${uuid%-02}"
 230                                 for disk in $(find /dev -type b); do
 231                                         set -- $(dd if=$disk bs=1 skip=440 count=4 2>/dev/null | hexdump -v -e '4/1 "%02x "')
 232                                         if [ "$4$3$2$1" = "$uuid" ]; then
 233                                                 uevent="/sys/class/block/${disk##*/}/uevent"
 234                                                 break
 235                                         fi
 236                                 done
 237                         ;;
 238                         /dev/*)
 239                                 uevent="/sys/class/block/${disk##*/}/uevent"
 240                         ;;
 241                 esac
 242
 243                 if [ -e "$uevent" ]; then
 244                         . "$uevent"
 245
 246                         export BOOTDEV_MAJOR=$MAJOR
 247                         export BOOTDEV_MINOR=$MINOR
 248                         return 0
 249                 fi
 250         fi
 251
 252         return 1
 253 }
 254
 255 export_partdevice() {
 256         local var="$1" offset="$2"
 257         local uevent MAJOR MINOR DEVNAME DEVTYPE
 258
 259         for uevent in /sys/class/block/*/uevent; do
 260                 . "$uevent"
 261                 if [ $BOOTDEV_MAJOR = $MAJOR -a $(($BOOTDEV_MINOR + $offset)) = $MINOR -a -b "/dev/$DEVNAME" ]; then
 262                         export "$var=$DEVNAME"
 263                         return 0
 264                 fi
 265         done
 266
 267         return 1
 268 }
 269
 270 get_partitions() { # <device> <filename>
 271         local disk="$1"
 272         local filename="$2"
 273
 274         if [ -b "$disk" -o -f "$disk" ]; then
 275                 v "Reading partition table from $filename..."
 276
 277                 local magic="$(hexdump -v -n 2 -s 0x1FE -e '1/2 "0x%04X"' "$disk")"
 278                 if [ "$magic" != 0xAA55 ]; then
 279                         v "Invalid partition table on $disk"
 280                         exit
 281                 fi
 282
 283                 rm -f "/tmp/partmap.$filename"
 284
 285                 local part
 286                 for part in 1 2 3 4; do
 287                         set -- $(hexdump -v -n 12 -s "$((0x1B2 + $part * 16))" -e '3/4 "0x%08X "' "$disk")
 288
 289                         local type="$(($1 % 256))"
 290                         local lba="$(($2))"
 291                         local num="$(($3))"
 292
 293                         [ $type -gt 0 ] || continue
 294
 295                         printf "%2d %5d %7d\n" $part $lba $num >> "/tmp/partmap.$filename"
 296                 done
 297         fi
 298 }
 299
 300 jffs2_copy_config() {
 301         if grep rootfs_data /proc/mtd >/dev/null; then
 302                 # squashfs+jffs2
 303                 mtd -e rootfs_data jffs2write "$CONF_TAR" rootfs_data
 304         else
 305                 # jffs2
 306                 mtd jffs2write "$CONF_TAR" rootfs
 307         fi
 308 }
 309
 310 # Flash firmware to MTD partition
 311 #
 312 # $(1): path to image
 313 # $(2): (optional) pipe command to extract firmware, e.g. dd bs=n skip=m
 314 default_do_upgrade() {
 315         sync
 316         if [ "$SAVE_CONFIG" -eq 1 ]; then
 317                 get_image "$1" "$2" | mtd $MTD_CONFIG_ARGS -j "$CONF_TAR" write - "${PART_NAME:-image}"
 318         else
 319                 get_image "$1" "$2" | mtd write - "${PART_NAME:-image}"
 320         fi
 321 }
 322
 323 do_upgrade() {
 324         v "Performing system upgrade..."
 325         if type 'platform_do_upgrade' >/dev/null 2>/dev/null; then
 326                 platform_do_upgrade "$ARGV"
 327         else
 328                 default_do_upgrade "$ARGV"
 329         fi
 330
 331         if [ "$SAVE_CONFIG" -eq 1 ] && type 'platform_copy_config' >/dev/null 2>/dev/null; then
 332                 platform_copy_config
 333         fi
 334
 335         v "Upgrade completed"
 336         [ -n "$DELAY" ] && sleep "$DELAY"
 337         ask_bool 1 "Reboot" && {
 338                 v "Rebooting system..."
 339                 umount -a
 340                 reboot -f
 341                 sleep 5
 342                 echo b 2>/dev/null >/proc/sysrq-trigger
 343         }
 344 }