target/linux/mvebu/image/gen_mvebu_sdcard_img.sh

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0-or-later
   3 #
   4 # Copyright (C) 2016 Josua Mayer
   5
   6 usage() {
   7         echo "$0 <outfile> [<bootloader> <type_partitionN> <size_partitionN> <img_partitionN>]?"
   8 }
   9
  10 # always require first 2 or 3 arguments
  11 # then in pairs up to 8 more for a total of up to 4 partitions
  12 if [ $# -lt 1 ] || [ $# -gt 14 ] || [ $((($# - 1) % 3)) -ne 0 ]; then
  13         if [ $# -lt 2 ] || [ $# -gt 15 ] || [ $((($# - 2) % 3)) -ne 0 ]; then
  14                 usage
  15                 exit 1
  16         else
  17                 BOOTLOADER="$2"
  18         fi
  19 fi
  20
  21 set -e
  22
  23 # parameters
  24 OUTFILE="$1"; shift
  25 if [ -n "$BOOTLOADER" ]; then
  26         shift
  27 fi
  28
  29 # generate image file
  30 printf "Creating %s from /dev/zero: " "$OUTFILE"
  31 dd if=/dev/zero of="$OUTFILE" bs=512 count=1 >/dev/null
  32 printf "Done\n"
  33
  34 while [ "$#" -ge 3 ]; do
  35         ptgen_args="$ptgen_args -t $1 -p $(($2 * 1024 + 256))"
  36         parts="$parts$3 "
  37         shift; shift; shift
  38 done
  39
  40 head=16
  41 sect=63
  42
  43 # create real partition table using fdisk
  44 printf "Creating partition table: "
  45 set $(ptgen -o "$OUTFILE" -h $head -s $sect -l 1024 -S 0x$SIGNATURE $ptgen_args)
  46 printf "Done\n"
  47
  48 # install bootloader
  49 if [ -n "$BOOTLOADER" ]; then
  50         printf "Writing bootloader: "
  51         dd of="$OUTFILE" if="$BOOTLOADER" bs=512 seek=1 conv=notrunc 2>/dev/null
  52         printf "Done\n"
  53 fi
  54
  55 i=1
  56 while [ "$#" -ge 2 ]; do
  57         img="${parts%% *}"
  58         parts="${parts#* }"
  59
  60         printf "Writing %s to partition %i: " "$img" $i
  61         (
  62                 cat "$img"
  63                 # add padding to avoid leaving behind old overlay fs data
  64                 dd if=/dev/zero bs=128k count=1 2>/dev/null
  65         ) | dd of="$OUTFILE" bs=512 seek=$(($1 / 512)) conv=notrunc 2>/dev/null
  66         printf "Done\n"
  67
  68         i=$((i+1))
  69         shift; shift
  70 done