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                         425a) cmd="bzcat";;
 100                         *) cmd="cat";;
 101                 esac
 102         fi
 103
 104         $cmd <"$from"
 105 }
 106
 107 get_image_dd() {
 108         local from="$1"; shift
 109
 110         (
 111                 exec 3>&2
 112                 ( exec 3>&2; get_image "$from" 2>&1 1>&3 | grep -v -F ' Broken pipe'     ) 2>&1 1>&3 \
 113                         | ( exec 3>&2; dd "$@" 2>&1 1>&3 | grep -v -E ' records (in|out)') 2>&1 1>&3
 114                 exec 3>&-
 115         )
 116 }
 117
 118 get_magic_word() {
 119         (get_image "$@" | dd bs=2 count=1 | hexdump -v -n 2 -e '1/1 "%02x"') 2>/dev/null
 120 }
 121
 122 get_magic_long() {
 123         (get_image "$@" | dd bs=4 count=1 | hexdump -v -n 4 -e '1/1 "%02x"') 2>/dev/null
 124 }
 125
 126 get_magic_gpt() {
 127         (get_image "$@" | dd bs=8 count=1 skip=64) 2>/dev/null
 128 }
 129
 130 get_magic_vfat() {
 131         (get_image "$@" | dd bs=3 count=1 skip=18) 2>/dev/null
 132 }
 133
 134 get_magic_fat32() {
 135         (get_image "$@" | dd bs=1 count=5 skip=82) 2>/dev/null
 136 }
 137
 138 part_magic_efi() {
 139         local magic=$(get_magic_gpt "$@")
 140         [ "$magic" = "EFI PART" ]
 141 }
 142
 143 part_magic_fat() {
 144         local magic=$(get_magic_vfat "$@")
 145         local magic_fat32=$(get_magic_fat32 "$@")
 146         [ "$magic" = "FAT" ] || [ "$magic_fat32" = "FAT32" ]
 147 }
 148
 149 export_bootdevice() {
 150         local cmdline bootdisk rootpart uuid blockdev uevent line class
 151         local MAJOR MINOR DEVNAME DEVTYPE
 152
 153         if read cmdline < /proc/cmdline; then
 154                 case "$cmdline" in
 155                         *root=*)
 156                                 rootpart="${cmdline##*root=}"
 157                                 rootpart="${rootpart%% *}"
 158                         ;;
 159                 esac
 160
 161                 case "$bootdisk" in
 162                         /dev/*)
 163                                 uevent="/sys/class/block/${bootdisk##*/}/uevent"
 164                         ;;
 165                 esac
 166
 167                 case "$rootpart" in
 168                         PARTUUID=[a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9]-[a-f0-9][a-f0-9])
 169                                 uuid="${rootpart#PARTUUID=}"
 170                                 uuid="${uuid%-[a-f0-9][a-f0-9]}"
 171                                 for blockdev in $(find /dev -type b); do
 172                                         set -- $(dd if=$blockdev bs=1 skip=440 count=4 2>/dev/null | hexdump -v -e '4/1 "%02x "')
 173                                         if [ "$4$3$2$1" = "$uuid" ]; then
 174                                                 uevent="/sys/class/block/${blockdev##*/}/uevent"
 175                                                 break
 176                                         fi
 177                                 done
 178                         ;;
 179                         PARTUUID=????????-????-????-????-??????????02)
 180                                 uuid="${rootpart#PARTUUID=}"
 181                                 uuid="${uuid%02}00"
 182                                 for disk in $(find /dev -type b); do
 183                                         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"')
 184                                         if [ "$4$3$2$1-$6$5-$8$7-$9" = "$uuid" ]; then
 185                                                 uevent="/sys/class/block/${disk##*/}/uevent"
 186                                                 break
 187                                         fi
 188                                 done
 189                         ;;
 190                         /dev/*)
 191                                 uevent="/sys/class/block/${rootpart##*/}/../uevent"
 192                         ;;
 193                         0x[a-f0-9][a-f0-9][a-f0-9] | 0x[a-f0-9][a-f0-9][a-f0-9][a-f0-9] | \
 194                         [a-f0-9][a-f0-9][a-f0-9] | [a-f0-9][a-f0-9][a-f0-9][a-f0-9])
 195                                 rootpart=0x${rootpart#0x}
 196                                 for class in /sys/class/block/*; do
 197                                         while read line; do
 198                                                 export -n "$line"
 199                                         done < "$class/uevent"
 200                                         if [ $((rootpart/256)) = $MAJOR -a $((rootpart%256)) = $MINOR ]; then
 201                                                 uevent="$class/../uevent"
 202                                         fi
 203                                 done
 204                         ;;
 205                 esac
 206
 207                 if [ -e "$uevent" ]; then
 208                         while read line; do
 209                                 export -n "$line"
 210                         done < "$uevent"
 211                         export BOOTDEV_MAJOR=$MAJOR
 212                         export BOOTDEV_MINOR=$MINOR
 213                         return 0
 214                 fi
 215         fi
 216
 217         return 1
 218 }
 219
 220 export_partdevice() {
 221         local var="$1" offset="$2"
 222         local uevent line MAJOR MINOR DEVNAME DEVTYPE
 223
 224         for uevent in /sys/class/block/*/uevent; do
 225                 while read line; do
 226                         export -n "$line"
 227                 done < "$uevent"
 228                 if [ $BOOTDEV_MAJOR = $MAJOR -a $(($BOOTDEV_MINOR + $offset)) = $MINOR -a -b "/dev/$DEVNAME" ]; then
 229                         export "$var=$DEVNAME"
 230                         return 0
 231                 fi
 232         done
 233
 234         return 1
 235 }
 236
 237 hex_le32_to_cpu() {
 238         [ "$(echo 01 | hexdump -v -n 2 -e '/2 "%x"')" = "3031" ] && {
 239                 echo "${1:0:2}${1:8:2}${1:6:2}${1:4:2}${1:2:2}"
 240                 return
 241         }
 242         echo "$@"
 243 }
 244
 245 get_partitions() { # <device> <filename>
 246         local disk="$1"
 247         local filename="$2"
 248
 249         if [ -b "$disk" -o -f "$disk" ]; then
 250                 v "Reading partition table from $filename..."
 251
 252                 local magic=$(dd if="$disk" bs=2 count=1 skip=255 2>/dev/null)
 253                 if [ "$magic" != $'\x55\xAA' ]; then
 254                         v "Invalid partition table on $disk"
 255                         exit
 256                 fi
 257
 258                 rm -f "/tmp/partmap.$filename"
 259
 260                 local part
 261                 part_magic_efi "$disk" && {
 262                         #export_partdevice will fail when partition number is greater than 15, as
 263                         #the partition major device number is not equal to the disk major device number
 264                         for part in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15; do
 265                                 set -- $(hexdump -v -n 48 -s "$((0x380 + $part * 0x80))" -e '4/4 "%08x"" "4/4 "%08x"" "4/4 "0x%08X "' "$disk")
 266
 267                                 local type="$1"
 268                                 local lba="$(( $(hex_le32_to_cpu $4) * 0x100000000 + $(hex_le32_to_cpu $3) ))"
 269                                 local end="$(( $(hex_le32_to_cpu $6) * 0x100000000 + $(hex_le32_to_cpu $5) ))"
 270                                 local num="$(( $end - $lba ))"
 271
 272                                 [ "$type" = "00000000000000000000000000000000" ] && continue
 273
 274                                 printf "%2d %5d %7d\n" $part $lba $num >> "/tmp/partmap.$filename"
 275                         done
 276                 } || {
 277                         for part in 1 2 3 4; do
 278                                 set -- $(hexdump -v -n 12 -s "$((0x1B2 + $part * 16))" -e '3/4 "0x%08X "' "$disk")
 279
 280                                 local type="$(( $(hex_le32_to_cpu $1) % 256))"
 281                                 local lba="$(( $(hex_le32_to_cpu $2) ))"
 282                                 local num="$(( $(hex_le32_to_cpu $3) ))"
 283
 284                                 [ $type -gt 0 ] || continue
 285
 286                                 printf "%2d %5d %7d\n" $part $lba $num >> "/tmp/partmap.$filename"
 287                         done
 288                 }
 289         fi
 290 }
 291
 292 indicate_upgrade() {
 293         . /etc/diag.sh
 294         set_state upgrade
 295 }
 296
 297 # Flash firmware to MTD partition
 298 #
 299 # $(1): path to image
 300 # $(2): (optional) pipe command to extract firmware, e.g. dd bs=n skip=m
 301 default_do_upgrade() {
 302         sync
 303         echo 3 > /proc/sys/vm/drop_caches
 304         if [ -n "$UPGRADE_BACKUP" ]; then
 305                 get_image "$1" "$2" | mtd $MTD_ARGS $MTD_CONFIG_ARGS -j "$UPGRADE_BACKUP" write - "${PART_NAME:-image}"
 306         else
 307                 get_image "$1" "$2" | mtd $MTD_ARGS write - "${PART_NAME:-image}"
 308         fi
 309         [ $? -ne 0 ] && exit 1
 310 }