target/linux/mvebu/image/gen_mvebu_sdcard_img.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (C) 2016 Josua Mayer
   4 #
   5 # This program is free software; you can redistribute it and/or
   6 # modify it under the terms of the GNU General Public License
   7 # as published by the Free Software Foundation; either version 2
   8 # of the License, or (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program; if not, write to the Free Software
  17 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  18 #
  19
  20 usage() {
  21         echo "$0 <outfile> [<bootloader> <type_partitionN> <size_partitionN> <img_partitionN>]?"
  22 }
  23
  24 # always require first 2 or 3 arguments
  25 # then in pairs up to 8 more for a total of up to 4 partitions
  26 if [ $# -lt 1 ] || [ $# -gt 14 ] || [ $((($# - 1) % 3)) -ne 0 ]; then
  27         if [ $# -lt 2 ] || [ $# -gt 15 ] || [ $((($# - 2) % 3)) -ne 0 ]; then
  28                 usage
  29                 exit 1
  30         else
  31                 BOOTLOADER="$2"
  32         fi
  33 fi
  34
  35 set -e
  36
  37 # parameters
  38 OUTFILE="$1"; shift
  39 if [ -n "$BOOTLOADER" ]; then
  40         shift
  41 fi
  42
  43 # generate image file
  44 printf "Creating %s from /dev/zero: " "$OUTFILE"
  45 dd if=/dev/zero of="$OUTFILE" bs=512 count=1 >/dev/null
  46 printf "Done\n"
  47
  48 while [ "$#" -ge 3 ]; do
  49         ptgen_args="$ptgen_args -t $1 -p $(($2 * 1024 + 256))"
  50         parts="$parts$3 "
  51         shift; shift; shift
  52 done
  53
  54 head=16
  55 sect=63
  56
  57 # create real partition table using fdisk
  58 printf "Creating partition table: "
  59 set $(ptgen -o "$OUTFILE" -h $head -s $sect -l 1024 -S 0x$SIGNATURE $ptgen_args)
  60 printf "Done\n"
  61
  62 # install bootloader
  63 if [ -n "$BOOTLOADER" ]; then
  64         printf "Writing bootloader: "
  65         dd of="$OUTFILE" if="$BOOTLOADER" bs=512 seek=1 conv=notrunc 2>/dev/null
  66         printf "Done\n"
  67 fi
  68
  69 i=1
  70 while [ "$#" -ge 2 ]; do
  71         img="${parts%% *}"
  72         parts="${parts#* }"
  73
  74         printf "Writing %s to partition %i: " "$img" $i
  75         (
  76                 cat "$img"
  77                 # add padding to avoid leaving behind old overlay fs data
  78                 dd if=/dev/zero bs=128k count=1 2>/dev/null
  79         ) | dd of="$OUTFILE" bs=512 seek=$(($1 / 512)) conv=notrunc 2>/dev/null
  80         printf "Done\n"
  81
  82         i=$((i+1))
  83         shift; shift
  84 done