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

   1 #!/bin/sh
   2
   3 RAM_ROOT=/tmp/root
   4
   5 export BACKUP_FILE=sysupgrade.tgz       # file extracted by preinit
   6
   7 [ -x /usr/bin/ldd ] || ldd() { LD_TRACE_LOADED_OBJECTS=1 $*; }
   8 libs() { ldd $* 2>/dev/null | sed -E 's/(.* => )?(.*) .*/\2/'; }
   9
  10 install_file() { # <file> [ <file> ... ]
  11         local target dest dir
  12         for file in "$@"; do
  13                 if [ -L "$file" ]; then
  14                         target="$(readlink -f "$file")"
  15                         dest="$RAM_ROOT/$file"
  16                         [ ! -f "$dest" ] && {
  17                                 dir="$(dirname "$dest")"
  18                                 mkdir -p "$dir"
  19                                 ln -s "$target" "$dest"
  20                         }
  21                         file="$target"
  22                 fi
  23                 dest="$RAM_ROOT/$file"
  24                 [ -f "$file" -a ! -f "$dest" ] && {
  25                         dir="$(dirname "$dest")"
  26                         mkdir -p "$dir"
  27                         cp "$file" "$dest"
  28                 }
  29         done
  30 }
  31
  32 install_bin() {
  33         local src files
  34         src=$1
  35         files=$1
  36         [ -x "$src" ] && files="$src $(libs $src)"
  37         install_file $files
  38 }
  39
  40 run_hooks() {
  41         local arg="$1"; shift
  42         for func in "$@"; do
  43                 eval "$func $arg"
  44         done
  45 }
  46
  47 ask_bool() {
  48         local default="$1"; shift;
  49         local answer="$default"
  50
  51         [ "$INTERACTIVE" -eq 1 ] && {
  52                 case "$default" in
  53                         0) echo -n "$* (y/N): ";;
  54                         *) echo -n "$* (Y/n): ";;
  55                 esac
  56                 read answer
  57                 case "$answer" in
  58                         y*) answer=1;;
  59                         n*) answer=0;;
  60                         *) answer="$default";;
  61                 esac
  62         }
  63         [ "$answer" -gt 0 ]
  64 }
  65
  66 v() {
  67         [ -n "$VERBOSE" ] && [ "$VERBOSE" -ge 1 ] && echo "$@"
  68 }
  69
  70 json_string() {
  71         local v="$1"
  72         v="${v//\\/\\\\}"
  73         v="${v//\"/\\\"}"
  74         echo "\"$v\""
  75 }
  76
  77 rootfs_type() {
  78         /bin/mount | awk '($3 ~ /^\/$/) && ($5 !~ /rootfs/) { print $5 }'
  79 }
  80
  81 get_image() { # <source> [ <command> ]
  82         local from="$1"
  83         local cmd="$2"
  84
  85         if [ -z "$cmd" ]; then
  86                 local magic="$(dd if="$from" bs=2 count=1 2>/dev/null | hexdump -n 2 -e '1/1 "%02x"')"
  87                 case "$magic" in
  88                         1f8b) cmd="zcat";;
  89                         425a) cmd="bzcat";;
  90                         *) cmd="cat";;
  91                 esac
  92         fi
  93
  94         cat "$from" 2>/dev/null | $cmd
  95 }
  96
  97 get_magic_word() {
  98         (get_image "$@" | dd bs=2 count=1 | hexdump -v -n 2 -e '1/1 "%02x"') 2>/dev/null
  99 }
 100
 101 get_magic_long() {
 102         (get_image "$@" | dd bs=4 count=1 | hexdump -v -n 4 -e '1/1 "%02x"') 2>/dev/null
 103 }
 104
 105 get_magic_gpt() {
 106         (get_image "$@" | dd bs=8 count=1 skip=64) 2>/dev/null
 107 }
 108
 109 get_magic_vfat() {
 110         (get_image "$@" | dd bs=1 count=3 skip=54) 2>/dev/null
 111 }
 112
 113 part_magic_efi() {
 114         local magic=$(get_magic_gpt "$@")
 115         [ "$magic" = "EFI PART" ]
 116 }
 117
 118 part_magic_fat() {
 119         local magic=$(get_magic_vfat "$@")
 120         [ "$magic" = "FAT" ]
 121 }
 122
 123 export_bootdevice() {
 124         local cmdline bootdisk rootpart uuid blockdev uevent line class
 125         local MAJOR MINOR DEVNAME DEVTYPE
 126
 127         if read cmdline < /proc/cmdline; then
 128                 case "$cmdline" in
 129                         *root=*)
 130                                 rootpart="${cmdline##*root=}"
 131                                 rootpart="${rootpart%% *}"
 132                         ;;
 133                 esac
 134
 135                 case "$bootdisk" in
 136                         /dev/*)
 137                                 uevent="/sys/class/block/${bootdisk##*/}/uevent"
 138                         ;;
 139                 esac
 140
 141                 case "$rootpart" in
 142                         PARTUUID=[a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9]-[a-f0-9][a-f0-9])
 143                                 uuid="${rootpart#PARTUUID=}"
 144                                 uuid="${uuid%-[a-f0-9][a-f0-9]}"
 145                                 for blockdev in $(find /dev -type b); do
 146                                         set -- $(dd if=$blockdev bs=1 skip=440 count=4 2>/dev/null | hexdump -v -e '4/1 "%02x "')
 147                                         if [ "$4$3$2$1" = "$uuid" ]; then
 148                                                 uevent="/sys/class/block/${blockdev##*/}/uevent"
 149                                                 break
 150                                         fi
 151                                 done
 152                         ;;
 153                         PARTUUID=????????-????-????-????-??????????02)
 154                                 uuid="${rootpart#PARTUUID=}"
 155                                 uuid="${uuid%02}00"
 156                                 for disk in $(find /dev -type b); do
 157                                         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"')
 158                                         if [ "$4$3$2$1-$6$5-$8$7-$9" = "$uuid" ]; then
 159                                                 uevent="/sys/class/block/${disk##*/}/uevent"
 160                                                 break
 161                                         fi
 162                                 done
 163                         ;;
 164                         /dev/*)
 165                                 uevent="/sys/class/block/${rootpart##*/}/../uevent"
 166                         ;;
 167                         0x[a-f0-9][a-f0-9][a-f0-9] | 0x[a-f0-9][a-f0-9][a-f0-9][a-f0-9] | \
 168                         [a-f0-9][a-f0-9][a-f0-9] | [a-f0-9][a-f0-9][a-f0-9][a-f0-9])
 169                                 rootpart=0x${rootpart#0x}
 170                                 for class in /sys/class/block/*; do
 171                                         while read line; do
 172                                                 export -n "$line"
 173                                         done < "$class/uevent"
 174                                         if [ $((rootpart/256)) = $MAJOR -a $((rootpart%256)) = $MINOR ]; then
 175                                                 uevent="$class/../uevent"
 176                                         fi
 177                                 done
 178                         ;;
 179                 esac
 180
 181                 if [ -e "$uevent" ]; then
 182                         while read line; do
 183                                 export -n "$line"
 184                         done < "$uevent"
 185                         export BOOTDEV_MAJOR=$MAJOR
 186                         export BOOTDEV_MINOR=$MINOR
 187                         return 0
 188                 fi
 189         fi
 190
 191         return 1
 192 }
 193
 194 export_partdevice() {
 195         local var="$1" offset="$2"
 196         local uevent line MAJOR MINOR DEVNAME DEVTYPE
 197
 198         for uevent in /sys/class/block/*/uevent; do
 199                 while read line; do
 200                         export -n "$line"
 201                 done < "$uevent"
 202                 if [ $BOOTDEV_MAJOR = $MAJOR -a $(($BOOTDEV_MINOR + $offset)) = $MINOR -a -b "/dev/$DEVNAME" ]; then
 203                         export "$var=$DEVNAME"
 204                         return 0
 205                 fi
 206         done
 207
 208         return 1
 209 }
 210
 211 hex_le32_to_cpu() {
 212         [ "$(echo 01 | hexdump -v -n 2 -e '/2 "%x"')" = "3031" ] && {
 213                 echo "${1:0:2}${1:8:2}${1:6:2}${1:4:2}${1:2:2}"
 214                 return
 215         }
 216         echo "$@"
 217 }
 218
 219 get_partitions() { # <device> <filename>
 220         local disk="$1"
 221         local filename="$2"
 222
 223         if [ -b "$disk" -o -f "$disk" ]; then
 224                 v "Reading partition table from $filename..."
 225
 226                 local magic=$(dd if="$disk" bs=2 count=1 skip=255 2>/dev/null)
 227                 if [ "$magic" != $'\x55\xAA' ]; then
 228                         v "Invalid partition table on $disk"
 229                         exit
 230                 fi
 231
 232                 rm -f "/tmp/partmap.$filename"
 233
 234                 local part
 235                 part_magic_efi "$disk" && {
 236                         #export_partdevice will fail when partition number is greater than 15, as
 237                         #the partition major device number is not equal to the disk major device number
 238                         for part in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15; do
 239                                 set -- $(hexdump -v -n 48 -s "$((0x380 + $part * 0x80))" -e '4/4 "%08x"" "4/4 "%08x"" "4/4 "0x%08X "' "$disk")
 240
 241                                 local type="$1"
 242                                 local lba="$(( $(hex_le32_to_cpu $4) * 0x100000000 + $(hex_le32_to_cpu $3) ))"
 243                                 local end="$(( $(hex_le32_to_cpu $6) * 0x100000000 + $(hex_le32_to_cpu $5) ))"
 244                                 local num="$(( $end - $lba ))"
 245
 246                                 [ "$type" = "00000000000000000000000000000000" ] && continue
 247
 248                                 printf "%2d %5d %7d\n" $part $lba $num >> "/tmp/partmap.$filename"
 249                         done
 250                 } || {
 251                         for part in 1 2 3 4; do
 252                                 set -- $(hexdump -v -n 12 -s "$((0x1B2 + $part * 16))" -e '3/4 "0x%08X "' "$disk")
 253
 254                                 local type="$(( $(hex_le32_to_cpu $1) % 256))"
 255                                 local lba="$(( $(hex_le32_to_cpu $2) ))"
 256                                 local num="$(( $(hex_le32_to_cpu $3) ))"
 257
 258                                 [ $type -gt 0 ] || continue
 259
 260                                 printf "%2d %5d %7d\n" $part $lba $num >> "/tmp/partmap.$filename"
 261                         done
 262                 }
 263         fi
 264 }
 265
 266 indicate_upgrade() {
 267         . /etc/diag.sh
 268         set_state upgrade
 269 }
 270
 271 # Flash firmware to MTD partition
 272 #
 273 # $(1): path to image
 274 # $(2): (optional) pipe command to extract firmware, e.g. dd bs=n skip=m
 275 default_do_upgrade() {
 276         sync
 277         if [ -n "$UPGRADE_BACKUP" ]; then
 278                 get_image "$1" "$2" | mtd $MTD_ARGS $MTD_CONFIG_ARGS -j "$UPGRADE_BACKUP" write - "${PART_NAME:-image}"
 279         else
 280                 get_image "$1" "$2" | mtd $MTD_ARGS write - "${PART_NAME:-image}"
 281         fi
 282         [ $? -ne 0 ] && exit 1
 283 }