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                         *block2mtd=*)
 130                                 bootdisk="${cmdline##*block2mtd=}"
 131                                 bootdisk="${bootdisk%%,*}"
 132                         ;;
 133                         *root=*)
 134                                 rootpart="${cmdline##*root=}"
 135                                 rootpart="${rootpart%% *}"
 136                         ;;
 137                 esac
 138
 139                 case "$bootdisk" in
 140                         /dev/*)
 141                                 uevent="/sys/class/block/${bootdisk##*/}/uevent"
 142                         ;;
 143                 esac
 144
 145                 case "$rootpart" in
 146                         PARTUUID=[a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9]-[a-f0-9][a-f0-9])
 147                                 uuid="${rootpart#PARTUUID=}"
 148                                 uuid="${uuid%-[a-f0-9][a-f0-9]}"
 149                                 for blockdev in $(find /dev -type b); do
 150                                         set -- $(dd if=$blockdev bs=1 skip=440 count=4 2>/dev/null | hexdump -v -e '4/1 "%02x "')
 151                                         if [ "$4$3$2$1" = "$uuid" ]; then
 152                                                 uevent="/sys/class/block/${blockdev##*/}/uevent"
 153                                                 break
 154                                         fi
 155                                 done
 156                         ;;
 157                         PARTUUID=????????-????-????-????-??????????02)
 158                                 uuid="${rootpart#PARTUUID=}"
 159                                 uuid="${uuid%02}00"
 160                                 for disk in $(find /dev -type b); do
 161                                         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"')
 162                                         if [ "$4$3$2$1-$6$5-$8$7-$9" = "$uuid" ]; then
 163                                                 uevent="/sys/class/block/${disk##*/}/uevent"
 164                                                 break
 165                                         fi
 166                                 done
 167                         ;;
 168                         /dev/*)
 169                                 uevent="/sys/class/block/${rootpart##*/}/../uevent"
 170                         ;;
 171                         0x[a-f0-9][a-f0-9][a-f0-9] | 0x[a-f0-9][a-f0-9][a-f0-9][a-f0-9] | \
 172                         [a-f0-9][a-f0-9][a-f0-9] | [a-f0-9][a-f0-9][a-f0-9][a-f0-9])
 173                                 rootpart=0x${rootpart#0x}
 174                                 for class in /sys/class/block/*; do
 175                                         while read line; do
 176                                                 export -n "$line"
 177                                         done < "$class/uevent"
 178                                         if [ $((rootpart/256)) = $MAJOR -a $((rootpart%256)) = $MINOR ]; then
 179                                                 uevent="$class/../uevent"
 180                                         fi
 181                                 done
 182                         ;;
 183                 esac
 184
 185                 if [ -e "$uevent" ]; then
 186                         while read line; do
 187                                 export -n "$line"
 188                         done < "$uevent"
 189                         export BOOTDEV_MAJOR=$MAJOR
 190                         export BOOTDEV_MINOR=$MINOR
 191                         return 0
 192                 fi
 193         fi
 194
 195         return 1
 196 }
 197
 198 export_partdevice() {
 199         local var="$1" offset="$2"
 200         local uevent line MAJOR MINOR DEVNAME DEVTYPE
 201
 202         for uevent in /sys/class/block/*/uevent; do
 203                 while read line; do
 204                         export -n "$line"
 205                 done < "$uevent"
 206                 if [ $BOOTDEV_MAJOR = $MAJOR -a $(($BOOTDEV_MINOR + $offset)) = $MINOR -a -b "/dev/$DEVNAME" ]; then
 207                         export "$var=$DEVNAME"
 208                         return 0
 209                 fi
 210         done
 211
 212         return 1
 213 }
 214
 215 hex_le32_to_cpu() {
 216         [ "$(echo 01 | hexdump -v -n 2 -e '/2 "%x"')" = "3031" ] && {
 217                 echo "${1:0:2}${1:8:2}${1:6:2}${1:4:2}${1:2:2}"
 218                 return
 219         }
 220         echo "$@"
 221 }
 222
 223 get_partitions() { # <device> <filename>
 224         local disk="$1"
 225         local filename="$2"
 226
 227         if [ -b "$disk" -o -f "$disk" ]; then
 228                 v "Reading partition table from $filename..."
 229
 230                 local magic=$(dd if="$disk" bs=2 count=1 skip=255 2>/dev/null)
 231                 if [ "$magic" != $'\x55\xAA' ]; then
 232                         v "Invalid partition table on $disk"
 233                         exit
 234                 fi
 235
 236                 rm -f "/tmp/partmap.$filename"
 237
 238                 local part
 239                 part_magic_efi "$disk" && {
 240                         #export_partdevice will fail when partition number is greater than 15, as
 241                         #the partition major device number is not equal to the disk major device number
 242                         for part in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15; do
 243                                 set -- $(hexdump -v -n 48 -s "$((0x380 + $part * 0x80))" -e '4/4 "%08x"" "4/4 "%08x"" "4/4 "0x%08X "' "$disk")
 244
 245                                 local type="$1"
 246                                 local lba="$(( $(hex_le32_to_cpu $4) * 0x100000000 + $(hex_le32_to_cpu $3) ))"
 247                                 local end="$(( $(hex_le32_to_cpu $6) * 0x100000000 + $(hex_le32_to_cpu $5) ))"
 248                                 local num="$(( $end - $lba ))"
 249
 250                                 [ "$type" = "00000000000000000000000000000000" ] && continue
 251
 252                                 printf "%2d %5d %7d\n" $part $lba $num >> "/tmp/partmap.$filename"
 253                         done
 254                 } || {
 255                         for part in 1 2 3 4; do
 256                                 set -- $(hexdump -v -n 12 -s "$((0x1B2 + $part * 16))" -e '3/4 "0x%08X "' "$disk")
 257
 258                                 local type="$(( $(hex_le32_to_cpu $1) % 256))"
 259                                 local lba="$(( $(hex_le32_to_cpu $2) ))"
 260                                 local num="$(( $(hex_le32_to_cpu $3) ))"
 261
 262                                 [ $type -gt 0 ] || continue
 263
 264                                 printf "%2d %5d %7d\n" $part $lba $num >> "/tmp/partmap.$filename"
 265                         done
 266                 }
 267         fi
 268 }
 269
 270 indicate_upgrade() {
 271         . /etc/diag.sh
 272         set_state upgrade
 273 }
 274
 275 # Flash firmware to MTD partition
 276 #
 277 # $(1): path to image
 278 # $(2): (optional) pipe command to extract firmware, e.g. dd bs=n skip=m
 279 default_do_upgrade() {
 280         sync
 281         if [ -n "$UPGRADE_BACKUP" ]; then
 282                 get_image "$1" "$2" | mtd $MTD_ARGS $MTD_CONFIG_ARGS -j "$UPGRADE_BACKUP" write - "${PART_NAME:-image}"
 283         else
 284                 get_image "$1" "$2" | mtd $MTD_ARGS write - "${PART_NAME:-image}"
 285         fi
 286         [ $? -ne 0 ] && exit 1
 287 }