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

   1 #!/bin/sh
   2
   3 RAM_ROOT=/tmp/root
   4
   5 [ -x /usr/bin/ldd ] || ldd() { LD_TRACE_LOADED_OBJECTS=1 $*; }
   6 libs() { ldd $* 2>/dev/null | sed -r 's/(.* => )?(.*) .*/\2/'; }
   7
   8 install_file() { # <file> [ <file> ... ]
   9         local target dest dir
  10         for file in "$@"; 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         [ "$answer" -gt 0 ]
  62 }
  63
  64 v() {
  65         [ "$VERBOSE" -ge 1 ] && echo "$@"
  66 }
  67
  68 json_string() {
  69         local v="$1"
  70         v="${v//\\/\\\\}"
  71         v="${v//\"/\\\"}"
  72         echo "\"$v\""
  73 }
  74
  75 rootfs_type() {
  76         /bin/mount | awk '($3 ~ /^\/$/) && ($5 !~ /rootfs/) { print $5 }'
  77 }
  78
  79 get_image() { # <source> [ <command> ]
  80         local from="$1"
  81         local cat="$2"
  82
  83         if [ -z "$cat" ]; then
  84                 local magic="$(dd if="$from" bs=2 count=1 2>/dev/null | hexdump -n 2 -e '1/1 "%02x"')"
  85                 case "$magic" in
  86                         1f8b) cat="zcat";;
  87                         425a) cat="bzcat";;
  88                         *) cat="cat";;
  89                 esac
  90         fi
  91
  92         $cat "$from" 2>/dev/null
  93 }
  94
  95 get_magic_word() {
  96         (get_image "$@" | dd bs=2 count=1 | hexdump -v -n 2 -e '1/1 "%02x"') 2>/dev/null
  97 }
  98
  99 get_magic_long() {
 100         (get_image "$@" | dd bs=4 count=1 | hexdump -v -n 4 -e '1/1 "%02x"') 2>/dev/null
 101 }
 102
 103 export_bootdevice() {
 104         local cmdline uuid disk uevent
 105         local MAJOR MINOR DEVNAME DEVTYPE
 106
 107         if read cmdline < /proc/cmdline; then
 108                 case "$cmdline" in
 109                         *block2mtd=*)
 110                                 disk="${cmdline##*block2mtd=}"
 111                                 disk="${disk%%,*}"
 112                         ;;
 113                         *root=*)
 114                                 disk="${cmdline##*root=}"
 115                                 disk="${disk%% *}"
 116                         ;;
 117                 esac
 118
 119                 case "$disk" in
 120                         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]-02)
 121                                 uuid="${disk#PARTUUID=}"
 122                                 uuid="${uuid%-02}"
 123                                 for disk in $(find /dev -type b); do
 124                                         set -- $(dd if=$disk bs=1 skip=440 count=4 2>/dev/null | hexdump -v -e '4/1 "%02x "')
 125                                         if [ "$4$3$2$1" = "$uuid" ]; then
 126                                                 uevent="/sys/class/block/${disk##*/}/uevent"
 127                                                 break
 128                                         fi
 129                                 done
 130                         ;;
 131                         /dev/*)
 132                                 uevent="/sys/class/block/${disk##*/}/uevent"
 133                         ;;
 134                 esac
 135
 136                 if [ -e "$uevent" ]; then
 137                         . "$uevent"
 138
 139                         export BOOTDEV_MAJOR=$MAJOR
 140                         export BOOTDEV_MINOR=$MINOR
 141                         return 0
 142                 fi
 143         fi
 144
 145         return 1
 146 }
 147
 148 export_partdevice() {
 149         local var="$1" offset="$2"
 150         local uevent MAJOR MINOR DEVNAME DEVTYPE
 151
 152         for uevent in /sys/class/block/*/uevent; do
 153                 . "$uevent"
 154                 if [ $BOOTDEV_MAJOR = $MAJOR -a $(($BOOTDEV_MINOR + $offset)) = $MINOR -a -b "/dev/$DEVNAME" ]; then
 155                         export "$var=$DEVNAME"
 156                         return 0
 157                 fi
 158         done
 159
 160         return 1
 161 }
 162
 163 get_partitions() { # <device> <filename>
 164         local disk="$1"
 165         local filename="$2"
 166
 167         if [ -b "$disk" -o -f "$disk" ]; then
 168                 v "Reading partition table from $filename..."
 169
 170                 local magic="$(hexdump -v -n 2 -s 0x1FE -e '1/2 "0x%04X"' "$disk")"
 171                 if [ "$magic" != 0xAA55 ]; then
 172                         v "Invalid partition table on $disk"
 173                         exit
 174                 fi
 175
 176                 rm -f "/tmp/partmap.$filename"
 177
 178                 local part
 179                 for part in 1 2 3 4; do
 180                         set -- $(hexdump -v -n 12 -s "$((0x1B2 + $part * 16))" -e '3/4 "0x%08X "' "$disk")
 181
 182                         local type="$(($1 % 256))"
 183                         local lba="$(($2))"
 184                         local num="$(($3))"
 185
 186                         [ $type -gt 0 ] || continue
 187
 188                         printf "%2d %5d %7d\n" $part $lba $num >> "/tmp/partmap.$filename"
 189                 done
 190         fi
 191 }
 192
 193 jffs2_copy_config() {
 194         if grep rootfs_data /proc/mtd >/dev/null; then
 195                 # squashfs+jffs2
 196                 mtd -e rootfs_data jffs2write "$CONF_TAR" rootfs_data
 197         else
 198                 # jffs2
 199                 mtd jffs2write "$CONF_TAR" rootfs
 200         fi
 201 }
 202
 203 # Flash firmware to MTD partition
 204 #
 205 # $(1): path to image
 206 # $(2): (optional) pipe command to extract firmware, e.g. dd bs=n skip=m
 207 default_do_upgrade() {
 208         sync
 209         if [ "$SAVE_CONFIG" -eq 1 ]; then
 210                 get_image "$1" "$2" | mtd $MTD_CONFIG_ARGS -j "$CONF_TAR" write - "${PART_NAME:-image}"
 211         else
 212                 get_image "$1" "$2" | mtd write - "${PART_NAME:-image}"
 213         fi
 214 }
 215
 216 do_upgrade_stage2() {
 217         v "Performing system upgrade..."
 218         if [ -n "$do_upgrade" ]; then
 219                 eval "$do_upgrade"
 220         elif type 'platform_do_upgrade' >/dev/null 2>/dev/null; then
 221                 platform_do_upgrade "$IMAGE"
 222         else
 223                 default_do_upgrade "$IMAGE"
 224         fi
 225
 226         if [ "$SAVE_CONFIG" -eq 1 ] && type 'platform_copy_config' >/dev/null 2>/dev/null; then
 227                 platform_copy_config
 228         fi
 229
 230         v "Upgrade completed"
 231         sleep 1
 232
 233         v "Rebooting system..."
 234         umount -a
 235         reboot -f
 236         sleep 5
 237         echo b 2>/dev/null >/proc/sysrq-trigger
 238 }