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.
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=125051
39
release/scripts/split-file.sh
Executable file
39
release/scripts/split-file.sh
Executable file
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#!/bin/sh
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#
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# $FreeBSD$
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#
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# Bail if things fail and be verbose about what we are doing
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set -ex
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# Arguments are as follows: file destdir chunksize description
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FILE=$1; shift
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DEST=$1; shift
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CHUNK_SIZE=$1; shift
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DESCR=$1; shift
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# Make sure we can read the file.
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[ -r ${FILE} ]
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# Create clean working area to stick file chunks and list in
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rm -rf ${DEST} || true
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mkdir -p ${DEST}
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# Split the file into pieces
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prefix=`basename $FILE`
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dd if=${FILE} bs=16k iseek=1 | split -b ${CHUNK_SIZE}k - ${DEST}/${prefix}.
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# Create a special file for the first 16k that gets stuck on the boot
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# floppy
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files=`ls ${DEST}/${prefix}.*`
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first=`echo "${files}" | head -1`
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bootchunk="${DEST}/${prefix}.boot"
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dd if=${FILE} of=${bootchunk} bs=16k count=1
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# Create the split index file
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echo `basename ${bootchunk}` "\"Boot floppy\"" > ${DEST}/${prefix}.split
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i=1
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for file in ${files}; do
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echo `basename ${file}` "\"${DESCR} floppy ${i}\"" >> ${DEST}/${prefix}.split
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i=$((i + 1))
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done
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