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 $* 2>/dev/null | sed -r 's/(.* => )?(.*) .*/\2/'; }
   9
  10 install_file() { # <file> [ <file> ... ]
  11         local target dest dir
  12         for file in "$@"; 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         [ "$answer" -gt 0 ]
  64 }
  65
  66 v() {
  67         [ "$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 "$@" | dd bs=4 count=1 | hexdump -v -n 4 -e '1/1 "%02x"') 2>/dev/null
 103 }
 104
 105 export_bootdevice() {
 106         local cmdline bootdisk rootpart uuid blockdev uevent line
 107         local MAJOR MINOR DEVNAME DEVTYPE
 108
 109         if read cmdline < /proc/cmdline; then
 110                 case "$cmdline" in
 111                         *block2mtd=*)
 112                                 bootdisk="${cmdline##*block2mtd=}"
 113                                 bootdisk="${bootdisk%%,*}"
 114                         ;;
 115                         *root=*)
 116                                 rootpart="${cmdline##*root=}"
 117                                 rootpart="${rootpart%% *}"
 118                         ;;
 119                 esac
 120
 121                 case "$bootdisk" in
 122                         /dev/*)
 123                                 uevent="/sys/class/block/${bootdisk##*/}/uevent"
 124                         ;;
 125                 esac
 126
 127                 case "$rootpart" in
 128                         PARTUUID=[a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9]-[a-f0-9][a-f0-9])
 129                                 uuid="${rootpart#PARTUUID=}"
 130                                 uuid="${uuid%-[a-f0-9][a-f0-9]}"
 131                                 for blockdev in $(find /dev -type b); do
 132                                         set -- $(dd if=$blockdev bs=1 skip=440 count=4 2>/dev/null | hexdump -v -e '4/1 "%02x "')
 133                                         if [ "$4$3$2$1" = "$uuid" ]; then
 134                                                 uevent="/sys/class/block/${blockdev##*/}/uevent"
 135                                                 break
 136                                         fi
 137                                 done
 138                         ;;
 139                         /dev/*)
 140                                 uevent="/sys/class/block/${rootpart##*/}/../uevent"
 141                         ;;
 142                 esac
 143
 144                 if [ -e "$uevent" ]; then
 145                         while read line; do
 146                                 export -n "$line"
 147                         done < "$uevent"
 148                         export BOOTDEV_MAJOR=$MAJOR
 149                         export BOOTDEV_MINOR=$MINOR
 150                         return 0
 151                 fi
 152         fi
 153
 154         return 1
 155 }
 156
 157 export_partdevice() {
 158         local var="$1" offset="$2"
 159         local uevent line MAJOR MINOR DEVNAME DEVTYPE
 160
 161         for uevent in /sys/class/block/*/uevent; do
 162                 while read line; do
 163                         export -n "$line"
 164                 done < "$uevent"
 165                 if [ $BOOTDEV_MAJOR = $MAJOR -a $(($BOOTDEV_MINOR + $offset)) = $MINOR -a -b "/dev/$DEVNAME" ]; then
 166                         export "$var=$DEVNAME"
 167                         return 0
 168                 fi
 169         done
 170
 171         return 1
 172 }
 173
 174 hex_le32_to_cpu() {
 175         [ "$(echo 01 | hexdump -v -n 2 -e '/2 "%x"')" = "3031" ] && {
 176                 echo "${1:0:2}${1:8:2}${1:6:2}${1:4:2}${1:2:2}"
 177                 return
 178         }
 179         echo "$@"
 180 }
 181
 182 get_partitions() { # <device> <filename>
 183         local disk="$1"
 184         local filename="$2"
 185
 186         if [ -b "$disk" -o -f "$disk" ]; then
 187                 v "Reading partition table from $filename..."
 188
 189                 local magic=$(dd if="$disk" bs=2 count=1 skip=255 2>/dev/null)
 190                 if [ "$magic" != $'\x55\xAA' ]; then
 191                         v "Invalid partition table on $disk"
 192                         exit
 193                 fi
 194
 195                 rm -f "/tmp/partmap.$filename"
 196
 197                 local part
 198                 for part in 1 2 3 4; do
 199                         set -- $(hexdump -v -n 12 -s "$((0x1B2 + $part * 16))" -e '3/4 "0x%08X "' "$disk")
 200
 201                         local type="$(( $(hex_le32_to_cpu $1) % 256))"
 202                         local lba="$(( $(hex_le32_to_cpu $2) ))"
 203                         local num="$(( $(hex_le32_to_cpu $3) ))"
 204
 205                         [ $type -gt 0 ] || continue
 206
 207                         printf "%2d %5d %7d\n" $part $lba $num >> "/tmp/partmap.$filename"
 208                 done
 209         fi
 210 }
 211
 212 indicate_upgrade() {
 213         . /etc/diag.sh
 214         set_state upgrade
 215 }
 216
 217 # Flash firmware to MTD partition
 218 #
 219 # $(1): path to image
 220 # $(2): (optional) pipe command to extract firmware, e.g. dd bs=n skip=m
 221 default_do_upgrade() {
 222         sync
 223         if [ "$UPGRADE_OPT_SAVE_CONFIG" -eq 1 ]; then
 224                 get_image "$1" "$2" | mtd $MTD_ARGS $MTD_CONFIG_ARGS -j "$UPGRADE_BACKUP" write - "${PART_NAME:-image}"
 225         else
 226                 get_image "$1" "$2" | mtd $MTD_ARGS write - "${PART_NAME:-image}"
 227         fi
 228         [ $? -ne 0 ] && exit 1
 229 }