scripts/gen_image_generic.sh

   1 #!/bin/sh
   2 # Copyright (C) 2006-2012 OpenWrt.org
   3 set -e -x
   4 if [ $# -ne 5 ] && [ $# -ne 6 ]; then
   5     echo "SYNTAX: $0 <file> <kernel size> <kernel directory> <rootfs size> <rootfs image> [<align>]"
   6     exit 1
   7 fi
   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
  21 # create partition table
  22 set $(ptgen -o "$OUTPUT" -h $head -s $sect ${GUID:+-g} -p "${KERNELSIZE}m" -p "${ROOTFSSIZE}m" ${ALIGN:+-l $ALIGN} ${SIGNATURE:+-S 0x$SIGNATURE} ${GUID:+-G $GUID})
  23
  24 KERNELOFFSET="$(($1 / 512))"
  25 KERNELSIZE="$2"
  26 ROOTFSOFFSET="$(($3 / 512))"
  27 ROOTFSSIZE="$(($4 / 512))"
  28
  29 [ -n "$PADDING" ] && dd if=/dev/zero of="$OUTPUT" bs=512 seek="$ROOTFSOFFSET" conv=notrunc count="$ROOTFSSIZE"
  30 dd if="$ROOTFSIMAGE" of="$OUTPUT" bs=512 seek="$ROOTFSOFFSET" conv=notrunc
  31
  32 if [ -n "$GUID" ]; then
  33     [ -n "$PADDING" ] && dd if=/dev/zero of="$OUTPUT" bs=512 seek="$((ROOTFSOFFSET + ROOTFSSIZE))" conv=notrunc count="$sect"
  34     mkfs.fat -n kernel -C "$OUTPUT.kernel" -S 512 "$((KERNELSIZE / 1024))"
  35     mcopy -s -i "$OUTPUT.kernel" "$KERNELDIR"/* ::/
  36 else
  37     make_ext4fs -J -L kernel -l "$KERNELSIZE" "$OUTPUT.kernel" "$KERNELDIR"
  38 fi
  39 dd if="$OUTPUT.kernel" of="$OUTPUT" bs=512 seek="$KERNELOFFSET" conv=notrunc
  40 rm -f "$OUTPUT.kernel"