target/linux/mvebu/image/gen_mvebu_sdcard_img.sh

   1 #!/usr/bin/env bash
   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> <sectors_partitionN> <img_partitionN>]?"
  22 }
  23
  24 # always require first 3 arguments
  25 # then in pairs up to 8 more for a total of up to 4 partitions
  26 if [ $# -lt 2 ] || [ $# -gt 15 ] || [ $((($# - 2) % 3)) -ne 0 ]; then
  27         usage
  28         exit 1
  29 fi
  30
  31 set -e
  32
  33 # parameters
  34 OUTFILE="$1"; shift
  35 BOOTLOADER="$1"; shift
  36
  37 # generate image file
  38 printf "Creating $OUTFILE from /dev/zero: "
  39 dd if=/dev/zero of="$OUTFILE" bs=512 count=1 >/dev/null
  40 printf "Done\n"
  41
  42 while [ "$#" -ge 3 ]; do
  43         ptgen_args="$ptgen_args -t $1 -p $(($2 / 2 + 256))"
  44         parts="$parts$3 "
  45         shift; shift; shift
  46 done
  47
  48 head=16
  49 sect=63
  50
  51 # create real partition table using fdisk
  52 printf "Creating partition table: "
  53 set `ptgen -o "$OUTFILE" -h $head -s $sect -l 1024 -S 0x$SIGNATURE $ptgen_args`
  54 printf "Done\n"
  55
  56 # install bootloader
  57 printf "Writing bootloader: "
  58 dd of="$OUTFILE" if="$BOOTLOADER" bs=512 seek=1 conv=notrunc 2>/dev/null
  59 printf "Done\n"
  60
  61 i=1
  62 while [ "$#" -ge 2 ]; do
  63         img="${parts%% *}"
  64         parts="${parts#* }"
  65
  66         printf "Writing %s to partition %i: " "$img" $i
  67         (
  68                 cat "$img"
  69                 # add padding to avoid leaving behind old overlay fs data
  70                 dd if=/dev/zero bs=128k count=1 2>/dev/null
  71         ) | dd of="$OUTFILE" bs=512 seek=$(($1 / 512)) conv=notrunc 2>/dev/null
  72         printf "Done\n"
  73
  74         let i=i+1
  75         shift; shift
  76 done