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

   1 RAM_ROOT=/tmp/root
   2
   3 export BACKUP_FILE=sysupgrade.tgz       # file extracted by preinit
   4
   5 [ -x /usr/bin/ldd ] || ldd() { LD_TRACE_LOADED_OBJECTS=1 $*; }
   6 libs() { ldd $* 2>/dev/null | sed -E 's/(.* => )?(.*) .*/\2/'; }
   7
   8 install_file() { # <file> [ <file> ... ]
   9         local target dest dir
  10         for file in "$@"; do
  11                 if [ -L "$file" ]; then
  12                         target="$(readlink -f "$file")"
  13                         dest="$RAM_ROOT/$file"
  14                         [ ! -f "$dest" ] && {
  15                                 dir="$(dirname "$dest")"
  16                                 mkdir -p "$dir"
  17                                 ln -s "$target" "$dest"
  18                         }
  19                         file="$target"
  20                 fi
  21                 dest="$RAM_ROOT/$file"
  22                 [ -f "$file" -a ! -f "$dest" ] && {
  23                         dir="$(dirname "$dest")"
  24                         mkdir -p "$dir"
  25                         cp "$file" "$dest"
  26                 }
  27         done
  28 }
  29
  30 install_bin() {
  31         local src files
  32         src=$1
  33         files=$1
  34         [ -x "$src" ] && files="$src $(libs $src)"
  35         install_file $files
  36 }
  37
  38 run_hooks() {
  39         local arg="$1"; shift
  40         for func in "$@"; do
  41                 eval "$func $arg"
  42         done
  43 }
  44
  45 ask_bool() {
  46         local default="$1"; shift;
  47         local answer="$default"
  48
  49         [ "$INTERACTIVE" -eq 1 ] && {
  50                 case "$default" in
  51                         0) echo -n "$* (y/N): ";;
  52                         *) echo -n "$* (Y/n): ";;
  53                 esac
  54                 read answer
  55                 case "$answer" in
  56                         y*) answer=1;;
  57                         n*) answer=0;;
  58                         *) answer="$default";;
  59                 esac
  60         }
  61         [ "$answer" -gt 0 ]
  62 }
  63
  64 _v() {
  65         [ -n "$VERBOSE" ] && [ "$VERBOSE" -ge 1 ] && echo "$*" >&2
  66 }
  67
  68 _vn() {
  69         [ -n "$VERBOSE" ] && [ "$VERBOSE" -ge 1 ] && echo -n "$*" >&2
  70 }
  71
  72 v() {
  73         _v "$(date) upgrade: $@"
  74 }
  75
  76 vn() {
  77         _vn "$(date) upgrade: $@"
  78 }
  79
  80 json_string() {
  81         local v="$1"
  82         v="${v//\\/\\\\}"
  83         v="${v//\"/\\\"}"
  84         echo "\"$v\""
  85 }
  86
  87 rootfs_type() {
  88         /bin/mount | awk '($3 ~ /^\/$/) && ($5 !~ /rootfs/) { print $5 }'
  89 }
  90
  91 get_image() { # <source> [ <command> ]
  92         local from="$1"
  93         local cmd="$2"
  94
  95         if [ -z "$cmd" ]; then
  96                 local magic="$(dd if="$from" bs=2 count=1 2>/dev/null | hexdump -n 2 -e '1/1 "%02x"')"
  97                 case "$magic" in
  98                         1f8b) cmd="zcat";;
  99                         *) cmd="cat";;
 100                 esac
 101         fi
 102
 103         $cmd <"$from"
 104 }
 105
 106 get_image_dd() {
 107         local from="$1"; shift
 108
 109         (
 110                 exec 3>&2
 111                 ( exec 3>&2; get_image "$from" 2>&1 1>&3 | grep -v -F ' Broken pipe'     ) 2>&1 1>&3 \
 112                         | ( exec 3>&2; dd "$@" 2>&1 1>&3 | grep -v -E ' records (in|out)') 2>&1 1>&3
 113                 exec 3>&-
 114         )
 115 }
 116
 117 get_magic_word() {
 118         (get_image "$@" | dd bs=2 count=1 | hexdump -v -n 2 -e '1/1 "%02x"') 2>/dev/null
 119 }
 120
 121 get_magic_long() {
 122         (get_image "$@" | dd bs=4 count=1 | hexdump -v -n 4 -e '1/1 "%02x"') 2>/dev/null
 123 }
 124
 125 get_magic_gpt() {
 126         (get_image "$@" | dd bs=8 count=1 skip=64) 2>/dev/null
 127 }
 128
 129 get_magic_vfat() {
 130         (get_image "$@" | dd bs=3 count=1 skip=18) 2>/dev/null
 131 }
 132
 133 get_magic_fat32() {
 134         (get_image "$@" | dd bs=1 count=5 skip=82) 2>/dev/null
 135 }
 136
 137 part_magic_efi() {
 138         local magic=$(get_magic_gpt "$@")
 139         [ "$magic" = "EFI PART" ]
 140 }
 141
 142 part_magic_fat() {
 143         local magic=$(get_magic_vfat "$@")
 144         local magic_fat32=$(get_magic_fat32 "$@")
 145         [ "$magic" = "FAT" ] || [ "$magic_fat32" = "FAT32" ]
 146 }
 147
 148 export_bootdevice() {
 149         local cmdline uuid blockdev uevent line class
 150         local MAJOR MINOR DEVNAME DEVTYPE
 151         local rootpart="$(cmdline_get_var root)"
 152
 153         case "$rootpart" in
 154                 PARTUUID=[a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9]-[a-f0-9][a-f0-9])
 155                         uuid="${rootpart#PARTUUID=}"
 156                         uuid="${uuid%-[a-f0-9][a-f0-9]}"
 157                         for blockdev in $(find /dev -type b); do
 158                                 set -- $(dd if=$blockdev bs=1 skip=440 count=4 2>/dev/null | hexdump -v -e '4/1 "%02x "')
 159                                 if [ "$4$3$2$1" = "$uuid" ]; then
 160                                         uevent="/sys/class/block/${blockdev##*/}/uevent"
 161                                         break
 162                                 fi
 163                         done
 164                 ;;
 165                 PARTUUID=????????-????-????-????-??????????02)
 166                         uuid="${rootpart#PARTUUID=}"
 167                         uuid="${uuid%02}00"
 168                         for disk in $(find /dev -type b); do
 169                                 set -- $(dd if=$disk bs=1 skip=568 count=16 2>/dev/null | hexdump -v -e '8/1 "%02x "" "2/1 "%02x""-"6/1 "%02x"')
 170                                 if [ "$4$3$2$1-$6$5-$8$7-$9" = "$uuid" ]; then
 171                                         uevent="/sys/class/block/${disk##*/}/uevent"
 172                                         break
 173                                 fi
 174                         done
 175                 ;;
 176                 /dev/*)
 177                         uevent="/sys/class/block/${rootpart##*/}/../uevent"
 178                 ;;
 179                 0x[a-f0-9][a-f0-9][a-f0-9] | 0x[a-f0-9][a-f0-9][a-f0-9][a-f0-9] | \
 180                 [a-f0-9][a-f0-9][a-f0-9] | [a-f0-9][a-f0-9][a-f0-9][a-f0-9])
 181                         rootpart=0x${rootpart#0x}
 182                         for class in /sys/class/block/*; do
 183                                 while read line; do
 184                                         export -n "$line"
 185                                 done < "$class/uevent"
 186                                 if [ $((rootpart/256)) = $MAJOR -a $((rootpart%256)) = $MINOR ]; then
 187                                         uevent="$class/../uevent"
 188                                 fi
 189                         done
 190                 ;;
 191         esac
 192
 193         if [ -e "$uevent" ]; then
 194                 while read line; do
 195                         export -n "$line"
 196                 done < "$uevent"
 197                 export BOOTDEV_MAJOR=$MAJOR
 198                 export BOOTDEV_MINOR=$MINOR
 199                 return 0
 200         fi
 201
 202         return 1
 203 }
 204
 205 export_partdevice() {
 206         local var="$1" offset="$2"
 207         local uevent line MAJOR MINOR DEVNAME DEVTYPE
 208
 209         for uevent in /sys/class/block/*/uevent; do
 210                 while read line; do
 211                         export -n "$line"
 212                 done < "$uevent"
 213                 if [ $BOOTDEV_MAJOR = $MAJOR -a $(($BOOTDEV_MINOR + $offset)) = $MINOR -a -b "/dev/$DEVNAME" ]; then
 214                         export "$var=$DEVNAME"
 215                         return 0
 216                 fi
 217         done
 218
 219         return 1
 220 }
 221
 222 hex_le32_to_cpu() {
 223         [ "$(echo 01 | hexdump -v -n 2 -e '/2 "%x"')" = "3031" ] && {
 224                 echo "${1:0:2}${1:8:2}${1:6:2}${1:4:2}${1:2:2}"
 225                 return
 226         }
 227         echo "$@"
 228 }
 229
 230 get_partition_by_name() {
 231         for partname in /sys/class/block/$1/*/name; do
 232                 [ "$(cat ${partname})" = "$2" ] && {
 233                         basename ${partname%%/name}
 234                         break
 235                 }
 236         done
 237 }
 238
 239 get_partitions() { # <device> <filename>
 240         local disk="$1"
 241         local filename="$2"
 242
 243         if [ -b "$disk" -o -f "$disk" ]; then
 244                 v "Reading partition table from $filename..."
 245
 246                 local magic=$(dd if="$disk" bs=2 count=1 skip=255 2>/dev/null)
 247                 if [ "$magic" != $'\x55\xAA' ]; then
 248                         v "Invalid partition table on $disk"
 249                         exit
 250                 fi
 251
 252                 rm -f "/tmp/partmap.$filename"
 253
 254                 local part
 255                 part_magic_efi "$disk" && {
 256                         #export_partdevice will fail when partition number is greater than 15, as
 257                         #the partition major device number is not equal to the disk major device number
 258                         for part in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15; do
 259                                 set -- $(hexdump -v -n 48 -s "$((0x380 + $part * 0x80))" -e '4/4 "%08x"" "4/4 "%08x"" "4/4 "0x%08X "' "$disk")
 260
 261                                 local type="$1"
 262                                 local lba="$(( $(hex_le32_to_cpu $4) * 0x100000000 + $(hex_le32_to_cpu $3) ))"
 263                                 local end="$(( $(hex_le32_to_cpu $6) * 0x100000000 + $(hex_le32_to_cpu $5) ))"
 264                                 local num="$(( $end - $lba ))"
 265
 266                                 [ "$type" = "00000000000000000000000000000000" ] && continue
 267
 268                                 printf "%2d %5d %7d\n" $part $lba $num >> "/tmp/partmap.$filename"
 269                         done
 270                 } || {
 271                         for part in 1 2 3 4; do
 272                                 set -- $(hexdump -v -n 12 -s "$((0x1B2 + $part * 16))" -e '3/4 "0x%08X "' "$disk")
 273
 274                                 local type="$(( $(hex_le32_to_cpu $1) % 256))"
 275                                 local lba="$(( $(hex_le32_to_cpu $2) ))"
 276                                 local num="$(( $(hex_le32_to_cpu $3) ))"
 277
 278                                 [ $type -gt 0 ] || continue
 279
 280                                 printf "%2d %5d %7d\n" $part $lba $num >> "/tmp/partmap.$filename"
 281                         done
 282                 }
 283         fi
 284 }
 285
 286 indicate_upgrade() {
 287         . /etc/diag.sh
 288         set_state upgrade
 289 }
 290
 291 # Flash firmware to MTD partition
 292 #
 293 # $(1): path to image
 294 # $(2): (optional) pipe command to extract firmware, e.g. dd bs=n skip=m
 295 default_do_upgrade() {
 296         sync
 297         echo 3 > /proc/sys/vm/drop_caches
 298         if [ -n "$UPGRADE_BACKUP" ]; then
 299                 get_image "$1" "$2" | mtd $MTD_ARGS $MTD_CONFIG_ARGS -j "$UPGRADE_BACKUP" write - "${PART_NAME:-image}"
 300         else
 301                 get_image "$1" "$2" | mtd $MTD_ARGS write - "${PART_NAME:-image}"
 302         fi
 303         [ $? -ne 0 ] && exit 1
 304 }