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 v() {
  69         _v "$(date) upgrade: $@"
  70         logger -p info -t upgrade "$@"
  71 }
  72
  73 json_string() {
  74         local v="$1"
  75         v="${v//\\/\\\\}"
  76         v="${v//\"/\\\"}"
  77         echo "\"$v\""
  78 }
  79
  80 rootfs_type() {
  81         /bin/mount | awk '($3 ~ /^\/$/) && ($5 !~ /rootfs/) { print $5 }'
  82 }
  83
  84 get_image() { # <source> [ <command> ]
  85         local from="$1"
  86         local cmd="$2"
  87
  88         if [ -z "$cmd" ]; then
  89                 local magic="$(dd if="$from" bs=2 count=1 2>/dev/null | hexdump -n 2 -e '1/1 "%02x"')"
  90                 case "$magic" in
  91                         1f8b) cmd="busybox zcat";;
  92                         *) cmd="cat";;
  93                 esac
  94         fi
  95
  96         $cmd <"$from"
  97 }
  98
  99 get_image_dd() {
 100         local from="$1"; shift
 101
 102         (
 103                 exec 3>&2
 104                 ( exec 3>&2; get_image "$from" 2>&1 1>&3 | grep -v -F ' Broken pipe'     ) 2>&1 1>&3 \
 105                         | ( exec 3>&2; dd "$@" 2>&1 1>&3 | grep -v -E ' records (in|out)') 2>&1 1>&3
 106                 exec 3>&-
 107         )
 108 }
 109
 110 get_magic_word() {
 111         (get_image "$@" | dd bs=2 count=1 | hexdump -v -n 2 -e '1/1 "%02x"') 2>/dev/null
 112 }
 113
 114 get_magic_long() {
 115         (get_image "$@" | dd bs=4 count=1 | hexdump -v -n 4 -e '1/1 "%02x"') 2>/dev/null
 116 }
 117
 118 get_magic_gpt() {
 119         (get_image "$@" | dd bs=8 count=1 skip=64) 2>/dev/null
 120 }
 121
 122 get_magic_vfat() {
 123         (get_image "$@" | dd bs=3 count=1 skip=18) 2>/dev/null
 124 }
 125
 126 get_magic_fat32() {
 127         (get_image "$@" | dd bs=1 count=5 skip=82) 2>/dev/null
 128 }
 129
 130 identify_magic_long() {
 131         local magic=$1
 132         case "$magic" in
 133                 "55424923")
 134                         echo "ubi"
 135                         ;;
 136                 "31181006")
 137                         echo "ubifs"
 138                         ;;
 139                 "68737173")
 140                         echo "squashfs"
 141                         ;;
 142                 "d00dfeed")
 143                         echo "fit"
 144                         ;;
 145                 "4349"*)
 146                         echo "combined"
 147                         ;;
 148                 "1f8b"*)
 149                         echo "gzip"
 150                         ;;
 151                 *)
 152                         echo "unknown $magic"
 153                         ;;
 154         esac
 155 }
 156
 157 part_magic_efi() {
 158         local magic=$(get_magic_gpt "$@")
 159         [ "$magic" = "EFI PART" ]
 160 }
 161
 162 part_magic_fat() {
 163         local magic=$(get_magic_vfat "$@")
 164         local magic_fat32=$(get_magic_fat32 "$@")
 165         [ "$magic" = "FAT" ] || [ "$magic_fat32" = "FAT32" ]
 166 }
 167
 168 export_bootdevice() {
 169         local cmdline uuid blockdev uevent line class
 170         local MAJOR MINOR DEVNAME DEVTYPE
 171         local rootpart="$(cmdline_get_var root)"
 172
 173         case "$rootpart" in
 174                 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])
 175                         uuid="${rootpart#PARTUUID=}"
 176                         uuid="${uuid%-[a-f0-9][a-f0-9]}"
 177                         for blockdev in $(find /dev -type b); do
 178                                 set -- $(dd if=$blockdev bs=1 skip=440 count=4 2>/dev/null | hexdump -v -e '4/1 "%02x "')
 179                                 if [ "$4$3$2$1" = "$uuid" ]; then
 180                                         uevent="/sys/class/block/${blockdev##*/}/uevent"
 181                                         break
 182                                 fi
 183                         done
 184                 ;;
 185                 PARTUUID=????????-????-????-????-??????????0?/PARTNROFF=1 | \
 186                 PARTUUID=????????-????-????-????-??????????02)
 187                         uuid="${rootpart#PARTUUID=}"
 188                         uuid="${uuid%/PARTNROFF=1}"
 189                         uuid="${uuid%0?}00"
 190                         for disk in $(find /dev -type b); do
 191                                 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"')
 192                                 if [ "$4$3$2$1-$6$5-$8$7-$9" = "$uuid" ]; then
 193                                         uevent="/sys/class/block/${disk##*/}/uevent"
 194                                         break
 195                                 fi
 196                         done
 197                 ;;
 198                 /dev/*)
 199                         uevent="/sys/class/block/${rootpart##*/}/../uevent"
 200                 ;;
 201                 0x[a-f0-9][a-f0-9][a-f0-9] | 0x[a-f0-9][a-f0-9][a-f0-9][a-f0-9] | \
 202                 [a-f0-9][a-f0-9][a-f0-9] | [a-f0-9][a-f0-9][a-f0-9][a-f0-9])
 203                         rootpart=0x${rootpart#0x}
 204                         for class in /sys/class/block/*; do
 205                                 while read line; do
 206                                         export -n "$line"
 207                                 done < "$class/uevent"
 208                                 if [ $((rootpart/256)) = $MAJOR -a $((rootpart%256)) = $MINOR ]; then
 209                                         uevent="$class/../uevent"
 210                                 fi
 211                         done
 212                 ;;
 213         esac
 214
 215         if [ -e "$uevent" ]; then
 216                 while read line; do
 217                         export -n "$line"
 218                 done < "$uevent"
 219                 export BOOTDEV_MAJOR=$MAJOR
 220                 export BOOTDEV_MINOR=$MINOR
 221                 return 0
 222         fi
 223
 224         return 1
 225 }
 226
 227 export_partdevice() {
 228         local var="$1" offset="$2"
 229         local uevent line MAJOR MINOR DEVNAME DEVTYPE
 230
 231         for uevent in /sys/class/block/*/uevent; do
 232                 while read line; do
 233                         export -n "$line"
 234                 done < "$uevent"
 235                 if [ $BOOTDEV_MAJOR = $MAJOR -a $(($BOOTDEV_MINOR + $offset)) = $MINOR -a -b "/dev/$DEVNAME" ]; then
 236                         export "$var=$DEVNAME"
 237                         return 0
 238                 fi
 239         done
 240
 241         return 1
 242 }
 243
 244 hex_le32_to_cpu() {
 245         [ "$(echo 01 | hexdump -v -n 2 -e '/2 "%x"')" = "3031" ] && {
 246                 echo "${1:0:2}${1:8:2}${1:6:2}${1:4:2}${1:2:2}"
 247                 return
 248         }
 249         echo "$@"
 250 }
 251
 252 get_partitions() { # <device> <filename>
 253         local disk="$1"
 254         local filename="$2"
 255
 256         if [ -b "$disk" -o -f "$disk" ]; then
 257                 v "Reading partition table from $filename..."
 258
 259                 local magic=$(dd if="$disk" bs=2 count=1 skip=255 2>/dev/null)
 260                 if [ "$magic" != $'\x55\xAA' ]; then
 261                         v "Invalid partition table on $disk"
 262                         exit
 263                 fi
 264
 265                 rm -f "/tmp/partmap.$filename"
 266
 267                 local part
 268                 part_magic_efi "$disk" && {
 269                         #export_partdevice will fail when partition number is greater than 15, as
 270                         #the partition major device number is not equal to the disk major device number
 271                         for part in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15; do
 272                                 set -- $(hexdump -v -n 48 -s "$((0x380 + $part * 0x80))" -e '4/4 "%08x"" "4/4 "%08x"" "4/4 "0x%08X "' "$disk")
 273
 274                                 local type="$1"
 275                                 local lba="$(( $(hex_le32_to_cpu $4) * 0x100000000 + $(hex_le32_to_cpu $3) ))"
 276                                 local end="$(( $(hex_le32_to_cpu $6) * 0x100000000 + $(hex_le32_to_cpu $5) ))"
 277                                 local num="$(( $end - $lba + 1 ))"
 278
 279                                 [ "$type" = "00000000000000000000000000000000" ] && continue
 280
 281                                 printf "%2d %5d %7d\n" $part $lba $num >> "/tmp/partmap.$filename"
 282                         done
 283                 } || {
 284                         for part in 1 2 3 4; do
 285                                 set -- $(hexdump -v -n 12 -s "$((0x1B2 + $part * 16))" -e '3/4 "0x%08X "' "$disk")
 286
 287                                 local type="$(( $(hex_le32_to_cpu $1) % 256))"
 288                                 local lba="$(( $(hex_le32_to_cpu $2) ))"
 289                                 local num="$(( $(hex_le32_to_cpu $3) ))"
 290
 291                                 [ $type -gt 0 ] || continue
 292
 293                                 printf "%2d %5d %7d\n" $part $lba $num >> "/tmp/partmap.$filename"
 294                         done
 295                 }
 296         fi
 297 }
 298
 299 indicate_upgrade() {
 300         . /etc/diag.sh
 301         set_state upgrade
 302 }
 303
 304 # Flash firmware to MTD partition
 305 #
 306 # $(1): path to image
 307 # $(2): (optional) pipe command to extract firmware, e.g. dd bs=n skip=m
 308 default_do_upgrade() {
 309         sync
 310         echo 3 > /proc/sys/vm/drop_caches
 311         if [ -n "$UPGRADE_BACKUP" ]; then
 312                 get_image "$1" "$2" | mtd $MTD_ARGS $MTD_CONFIG_ARGS -j "$UPGRADE_BACKUP" write - "${PART_NAME:-image}"
 313         else
 314                 get_image "$1" "$2" | mtd $MTD_ARGS write - "${PART_NAME:-image}"
 315         fi
 316         [ $? -ne 0 ] && exit 1
 317 }