9d00c955d4
* Add a "-N etcdir" command line option, defaulting to /etc.
* Use pax in mtree mode. This is the same idea as the change made in
revision 1.14, with the following changes:
+ use ". type=dir optional" instead of just ". type=dir", so the
output will not contain an explicit entry for the directory.
+ Explicitly set type=file and mode=0444 in the mtree lines.
+ Pass "-N ${etcdir}" to pax to make it use the correct passwd and
group files.
+ Pass "-s^./,," to pax to make it strip the leading "./" from file
names.
In Makefile.tarfloppy:
* Pass "-N ${DESTDIR}/etc" to buildfloppies.sh.
The resulting flopies have been verified to be identical to those
produced by version 1.13 of buildfloppies.sh, except that file owners
and modes are changed.
214 lines
5.8 KiB
Bash
214 lines
5.8 KiB
Bash
#!/bin/sh
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#
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# $NetBSD: buildfloppies.sh,v 1.17 2008/11/12 14:22:16 apb Exp $
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#
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# Copyright (c) 2002-2003 The NetBSD Foundation, Inc.
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# All rights reserved.
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#
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# This code is derived from software contributed to The NetBSD Foundation
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# by Luke Mewburn of Wasabi Systems.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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# set defaults
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#
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: ${PAX=pax}
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prog=${0##*/}
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etcdir=/etc
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usage()
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{
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cat 1>&2 << _USAGE_
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Usage: ${prog} [options] base size file [...]
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-i instboot eval instboot as a shell command to install a
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bootstrap. @IMAGE@ is replaced with with the
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file name of the floppy image.
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-m max maximum number of floppies to build
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-N etcdir directory in which to find passwd and group files.
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-p pad last floppy to floppy size
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-s suffix suffix for floppies
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base basename of generated floppies
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size size of a floppy in 512 byte blocks
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file [...] file(s) to store in the floppies
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_USAGE_
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exit 1
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}
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plural()
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{
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[ $1 -ne 1 ] && echo "s"
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}
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roundup()
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{
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echo $(( ( $1 + $2 - 1 ) / ( $2 ) ))
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}
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# parse and check arguments
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#
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while getopts i:m:N:ps: opt; do
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case ${opt} in
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i)
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instboot=${OPTARG} ;;
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m)
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maxdisks=${OPTARG} ;;
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N)
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etcdir=${OPTARG} ;;
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p)
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pad=1 ;;
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s)
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suffix=${OPTARG} ;;
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\?|*)
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usage
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;;
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esac
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done
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shift $(( ${OPTIND} - 1 ))
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[ $# -lt 3 ] && usage
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floppybase=$1
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floppysize=$2
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shift 2
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files=$*
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# setup temp file, remove existing images
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#
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floppy=floppy.$$.tar
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trap "rm -f ${floppy}" 0 1 2 3 # EXIT HUP INT QUIT
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rm -f ${floppybase}?${suffix} # XXX breaks if maxdisks > 9
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# create tar file
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#
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dd if=/dev/zero of=${floppy} bs=8k count=1 2>/dev/null
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(
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echo ". type=dir optional"
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for f in ${files}; do
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echo "./$f type=file uname=root gname=wheel mode=0444"
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done
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) | \
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${PAX} -O -w -b8k -M -N "${etcdir}" -s,^./,, >> ${floppy} || exit 1
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# install bootstrap before the image is split into multiple disks
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#
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if [ -n "$instboot" ]; then
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instboot=$( echo $instboot | sed -e s/@IMAGE@/${floppy}/ )
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echo "Running instboot: ${instboot}"
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eval ${instboot} || exit 1
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fi
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# check size against available number of disks
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#
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set -- $(ls -ln $floppy)
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bytes=$5
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blocks=$(roundup ${bytes} 512)
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# when calculating numdisks, take into account:
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# a) the image already has an 8K tar header prepended
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# b) each floppy needs an 8K tar volume header
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numdisks=$(roundup ${blocks}-16 ${floppysize}-16)
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if [ -z "${maxdisks}" ]; then
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maxdisks=${numdisks}
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fi
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# Try to accurately summarise free space
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#
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msg=
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# First floppy has 8k boot code, the rest an 8k 'multivolume header'.
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# Each file has a 512 byte header and is rounded to a multiple of 512.
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# The archive ends with two 512 byte blocks of zeros.
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# The output file is then rounded up to a multiple of 8k.
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# floppysize is in units of 512-byte blocks; free_space is in bytes.
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free_space=$(($maxdisks * ($floppysize - 16) * 512 - 512 * 2))
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for file in $files; do
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set -- $(ls -ln $file)
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file_bytes=$5
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pad_bytes=$(($(roundup $file_bytes 512) * 512 - $file_bytes))
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[ "$file_bytes" != 0 -o "$file" = "${file#USTAR.volsize.}" ] &&
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msg="$msg $file $pad_bytes,"
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free_space=$(($free_space - 512 - $file_bytes - $pad_bytes))
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done
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echo "Free space in last tar block:$msg"
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if [ ${numdisks} -gt ${maxdisks} ]; then
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# Add in the size of the last item (we really want the kernel) ...
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excess=$(( 0 - $free_space + $pad_bytes))
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echo 1>&2 \
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"$prog: Image is ${excess} bytes ($(( ${excess} / 1024 )) KB)"\
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"too big to fit on ${maxdisks} disk"$(plural ${maxdisks})
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exit 1
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fi
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padto=$(( ${floppysize} * ${maxdisks} ))
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if [ -n "${pad}" ]; then
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echo \
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"Writing $(( ${padto} * 512 )) bytes ($(( ${padto} / 2 )) KB)" \
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"on ${numdisks} disk"$(plural ${numdisks})"," \
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"padded by ${free_space} bytes" \
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"($(( ${free_space} / 1024 )) KB)"
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else
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echo "Writing ${bytes} bytes ($(( ${blocks} / 2 )) KB)"\
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"on ${numdisks} disk"$(plural ${numdisks})"," \
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"free space ${free_space} bytes" \
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"($(( ${free_space} / 1024 )) KB)"
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fi
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# write disks
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#
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curdisk=1
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image=
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seek=0
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skip=0
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floppysize8k=$(( ${floppysize} / 16 ))
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while [ ${curdisk} -le ${numdisks} ]; do
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image="${floppybase}${curdisk}${suffix}"
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echo "Creating disk ${curdisk} to ${image}"
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if [ ${curdisk} -eq 1 ]; then
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: > ${image}
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else
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echo USTARFS ${curdisk} > ${image}
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fi
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count=$(( ${floppysize8k} - ${seek} ))
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dd bs=8k conv=sync seek=${seek} skip=${skip} count=${count} \
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if=${floppy} of=${image} 2>/dev/null
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curdisk=$(( ${curdisk} + 1 ))
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skip=$(( $skip + $count ))
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seek=1
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done
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# pad last disk if necessary
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#
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if [ -n "${pad}" ]; then
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dd if=$image of=$image conv=notrunc conv=sync bs=${floppysize}b count=1
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fi
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# final status
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#
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echo "Final result:"
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ls -l ${floppybase}?${suffix} # XXX breaks if maxdisks > 9
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exit 0
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