Initial commit

scripts/gen_image_generic.sh

@@ -0,0 +1,60 @@
+#!/bin/sh
+# Copyright (C) 2006-2012 OpenWrt.org
+set -e -x
+if [ $# -ne 5 ] && [ $# -ne 6 ]; then
+    echo "SYNTAX: $0 <file> <kernel size> <kernel directory> <rootfs size> <rootfs image> [<align>]"
+    exit 1
+fi
+
+OUTPUT="$1"
+KERNELSIZE="$2"
+KERNELDIR="$3"
+KERNELPARTTYPE=${KERNELPARTTYPE:-83}
+ROOTFSSIZE="$4"
+ROOTFSIMAGE="$5"
+ROOTFSPARTTYPE=${ROOTFSPARTTYPE:-83}
+ALIGN="$6"
+
+rm -f "$OUTPUT"
+
+head=16
+sect=63
+
+# create partition table
+set $(ptgen -o "$OUTPUT" -h $head -s $sect ${GUID:+-g} -t "${KERNELPARTTYPE}" -p "${KERNELSIZE}m${PARTOFFSET:+@$PARTOFFSET}" -t "${ROOTFSPARTTYPE}" -p "${ROOTFSSIZE}m" ${ALIGN:+-l $ALIGN} ${SIGNATURE:+-S 0x$SIGNATURE} ${GUID:+-G $GUID})
+
+KERNELOFFSET="$(($1 / 512))"
+KERNELSIZE="$2"
+ROOTFSOFFSET="$(($3 / 512))"
+ROOTFSSIZE="$(($4 / 512))"
+
+# Using mcopy -s ... is using READDIR(3) to iterate through the directory
+# entries, hence they end up in the FAT filesystem in traversal order which
+# breaks reproducibility.
+# Implement recursive copy with reproducible order.
+dos_dircopy() {
+  local entry
+  local baseentry
+  for entry in "$1"/* ; do
+    if [ -f "$entry" ]; then
+      mcopy -i "$OUTPUT.kernel" "$entry" ::"$2"
+    elif [ -d "$entry" ]; then
+      baseentry="$(basename "$entry")"
+      mmd -i "$OUTPUT.kernel" ::"$2""$baseentry"
+      dos_dircopy "$entry" "$2""$baseentry"/
+    fi
+  done
+}
+
+[ -n "$PADDING" ] && dd if=/dev/zero of="$OUTPUT" bs=512 seek="$ROOTFSOFFSET" conv=notrunc count="$ROOTFSSIZE"
+dd if="$ROOTFSIMAGE" of="$OUTPUT" bs=512 seek="$ROOTFSOFFSET" conv=notrunc
+
+if [ -n "$GUID" ]; then
+    [ -n "$PADDING" ] && dd if=/dev/zero of="$OUTPUT" bs=512 seek="$((ROOTFSOFFSET + ROOTFSSIZE))" conv=notrunc count="$sect"
+    mkfs.fat --invariant -n kernel -C "$OUTPUT.kernel" -S 512 "$((KERNELSIZE / 1024))"
+    LC_ALL=C dos_dircopy "$KERNELDIR" /
+else
+    make_ext4fs -J -L kernel -l "$KERNELSIZE" ${SOURCE_DATE_EPOCH:+-T ${SOURCE_DATE_EPOCH}} "$OUTPUT.kernel" "$KERNELDIR"
+fi
+dd if="$OUTPUT.kernel" of="$OUTPUT" bs=512 seek="$KERNELOFFSET" conv=notrunc
+rm -f "$OUTPUT.kernel"