scripts/gen_image_generic.sh

   1 #!/usr/bin/env bash
   2 # Copyright (C) 2006-2012 OpenWrt.org
   3 set -x
   4 [ $# == 5 -o $# == 6 ] || {
   5     echo "SYNTAX: $0 <file> <kernel size> <kernel directory> <rootfs size> <rootfs image> [<align>]"
   6     exit 1
   7 }
   8
   9 OUTPUT="$1"
  10 KERNELSIZE="$2"
  11 KERNELDIR="$3"
  12 ROOTFSSIZE="$4"
  13 ROOTFSIMAGE="$5"
  14 ALIGN="$6"
  15
  16 rm -f "$OUTPUT"
  17
  18 head=16
  19 sect=63
  20 cyl=$(( ($KERNELSIZE + $ROOTFSSIZE) * 1024 * 1024 / ($head * $sect * 512)))
  21
  22 # create partition table
  23 set `ptgen -o "$OUTPUT" -h $head -s $sect -p ${KERNELSIZE}m -p ${ROOTFSSIZE}m ${ALIGN:+-l $ALIGN} ${SIGNATURE:+-S 0x$SIGNATURE}`
  24
  25 KERNELOFFSET="$(($1 / 512))"
  26 KERNELSIZE="$2"
  27 ROOTFSOFFSET="$(($3 / 512))"
  28 ROOTFSSIZE="$(($4 / 512))"
  29
  30 [ -n "$PADDING" ] && dd if=/dev/zero of="$OUTPUT" bs=512 seek="$ROOTFSOFFSET" conv=notrunc count="$ROOTFSSIZE"
  31 dd if="$ROOTFSIMAGE" of="$OUTPUT" bs=512 seek="$ROOTFSOFFSET" conv=notrunc
  32
  33 make_ext4fs -J -l "$KERNELSIZE" "$OUTPUT.kernel" "$KERNELDIR"
  34 dd if="$OUTPUT.kernel" of="$OUTPUT" bs=512 seek="$KERNELOFFSET" conv=notrunc
  35 rm -f "$OUTPUT.kernel"