From 18e5e37daafa7cdec81c4d3a5ee83cff6ec6815f Mon Sep 17 00:00:00 2001
From: John Baldwin <jhb@FreeBSD.org>
Date: Mon, 26 Jan 2004 19:45:09 +0000
Subject: [PATCH] Add a script to split a single file up into chunks using
 split along with a list file suitable for use with libstand's splitfs
 filesystem.  The first chunk of the file is 16k and has an extension of
 '.boot' and is meant to be placed on the boot floppy.  This is required
 because the current implementations of gzipfs and bzipfs in libstand want to
 read in the header of the file each time it is opened.

---
 release/scripts/split-file.sh | 39 +++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100755 release/scripts/split-file.sh

diff --git a/release/scripts/split-file.sh b/release/scripts/split-file.sh
new file mode 100755
index 00000000000..9dcf1a4e140
--- /dev/null
+++ b/release/scripts/split-file.sh
@@ -0,0 +1,39 @@
+#!/bin/sh
+#
+# $FreeBSD$
+#
+
+# Bail if things fail and be verbose about what we are doing
+set -ex
+
+# Arguments are as follows: file destdir chunksize description
+FILE=$1; shift
+DEST=$1; shift
+CHUNK_SIZE=$1; shift
+DESCR=$1; shift
+
+# Make sure we can read the file.
+[ -r ${FILE} ]
+
+# Create clean working area to stick file chunks and list in
+rm -rf ${DEST} || true
+mkdir -p ${DEST}
+
+# Split the file into pieces
+prefix=`basename $FILE`
+dd if=${FILE} bs=16k iseek=1 | split -b ${CHUNK_SIZE}k - ${DEST}/${prefix}.
+
+# Create a special file for the first 16k that gets stuck on the boot
+# floppy
+files=`ls ${DEST}/${prefix}.*`
+first=`echo "${files}" | head -1`
+bootchunk="${DEST}/${prefix}.boot"
+dd if=${FILE} of=${bootchunk} bs=16k count=1
+
+# Create the split index file
+echo `basename ${bootchunk}` "\"Boot floppy\"" > ${DEST}/${prefix}.split
+i=1
+for file in ${files}; do
+	echo `basename ${file}` "\"${DESCR} floppy ${i}\"" >> ${DEST}/${prefix}.split
+	i=$((i + 1))
+done