Add support for memstick generation on PowerPC. This is a little suboptimal

since glabel doesn't know about APM partitioning yet, but works well enough.

release/powerpc/make-memstick.sh

@@ -0,0 +1,78 @@
+#!/bin/sh
+#
+# This script generates a "memstick image" (image that can be copied to a
+# USB memory stick) from a directory tree.  Note that the script does not
+# clean up after itself very well for error conditions on purpose so the
+# problem can be diagnosed (full filesystem most likely but ...).
+#
+# Usage: make-memstick.sh <directory tree> <image filename>
+#
+# $FreeBSD$
+#
+
+PATH=/bin:/usr/bin:/sbin:/usr/sbin
+export PATH
+
+BLOCKSIZE=10240
+
+if [ $# -ne 2 ]; then
+  echo "make-memstick.sh /path/to/directory /path/to/image/file"
+  exit 1
+fi
+
+tempfile="${2}.$$"
+
+if [ ! -d ${1} ]; then
+  echo "${1} must be a directory"
+  exit 1
+fi
+
+if [ -e ${2} ]; then
+  echo "won't overwrite ${2}"
+  exit 1
+fi
+
+echo '/dev/da0s3 / ufs rw,noatime 1 1' > ${1}/etc/fstab
+rm -f ${tempfile}
+makefs -B big ${tempfile} ${1}
+if [ $? -ne 0 ]; then
+  echo "makefs failed"
+  exit 1
+fi
+rm ${1}/etc/fstab
+
+#
+# Use $BLOCKSIZE for transfers to improve efficiency.  When calculating
+# how many blocks to transfer "+ 2" is to account for truncation in the
+# division and to provide space for the label.
+#
+
+filesize=`stat -f "%z" ${tempfile}`
+blocks=$(($filesize / ${BLOCKSIZE} + 1728))
+dd if=/dev/zero of=${2} bs=${BLOCKSIZE} count=${blocks}
+if [ $? -ne 0 ]; then
+  echo "creation of image file failed"
+  exit 1
+fi
+
+unit=`mdconfig -a -t vnode -f ${2}`
+if [ $? -ne 0 ]; then
+  echo "mdconfig failed"
+  exit 1
+fi
+
+gpart create -s APM ${unit}
+gpart add -t freebsd-boot -s 800K ${unit}
+gpart bootcode -p ${1}/boot/boot1.hfs -i 1 ${unit}
+gpart add -t freebsd-ufs -l FreeBSD_Install ${unit}
+
+dd if=${tempfile} of=/dev/${unit}s3 bs=$BLOCKSIZE conv=sync
+if [ $? -ne 0 ]; then
+  echo "copying filesystem into image file failed"
+  exit 1
+fi
+
+mdconfig -d -u ${unit}
+
+rm -f ${tempfile}
+