buildfloppies.sh revision 1.8
1 #!/bin/sh 2 # 3 # $NetBSD: buildfloppies.sh,v 1.8 2004/06/12 18:39:53 dsl Exp $ 4 # 5 # Copyright (c) 2002-2003 The NetBSD Foundation, Inc. 6 # All rights reserved. 7 # 8 # This code is derived from software contributed to The NetBSD Foundation 9 # by Luke Mewburn of Wasabi Systems. 10 # 11 # Redistribution and use in source and binary forms, with or without 12 # modification, are permitted provided that the following conditions 13 # are met: 14 # 1. Redistributions of source code must retain the above copyright 15 # notice, this list of conditions and the following disclaimer. 16 # 2. Redistributions in binary form must reproduce the above copyright 17 # notice, this list of conditions and the following disclaimer in the 18 # documentation and/or other materials provided with the distribution. 19 # 3. All advertising materials mentioning features or use of this software 20 # must display the following acknowledgement: 21 # This product includes software developed by the NetBSD 22 # Foundation, Inc. and its contributors. 23 # 4. Neither the name of The NetBSD Foundation nor the names of its 24 # contributors may be used to endorse or promote products derived 25 # from this software without specific prior written permission. 26 # 27 # THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 # ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 # TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 # BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 # CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 # SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 # INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 # POSSIBILITY OF SUCH DAMAGE. 38 # 39 40 # set defaults 41 # 42 : ${PAX=pax} 43 prog=${0##*/} 44 45 46 usage() 47 { 48 cat 1>&2 << _USAGE_ 49 Usage: ${prog} [-i instboot] [-m max] [-p] [-s suffix] base size file [...] 50 -i instboot run instboot to install a bootstrap on @IMAGE@ 51 -m max maximum number of floppies to build 52 -p pad last floppy to floppy size 53 -s suffix suffix for floppies 54 base basename of generated floppies 55 size size of a floppy in 512 byte blocks 56 file [...] file(s) to build 57 _USAGE_ 58 exit 1 59 } 60 61 plural() 62 { 63 [ $1 -ne 1 ] && echo "s" 64 } 65 66 roundup() 67 { 68 echo $(( ( $1 + $2 - 1 ) / ( $2 ) )) 69 } 70 71 72 # parse and check arguments 73 # 74 75 while getopts i:m:ps: opt; do 76 case ${opt} in 77 i) 78 instboot=${OPTARG} ;; 79 m) 80 maxdisks=${OPTARG} ;; 81 p) 82 pad=1 ;; 83 s) 84 suffix=${OPTARG} ;; 85 \?|*) 86 usage 87 ;; 88 esac 89 done 90 91 shift $(( ${OPTIND} - 1 )) 92 [ $# -lt 3 ] && usage 93 floppybase=$1 94 floppysize=$2 95 shift 2 96 files=$* 97 98 # setup temp file, remove existing images 99 # 100 floppy=floppy.$$.tar 101 trap "rm -f ${floppy}" 0 1 2 3 # EXIT HUP INT QUIT 102 rm -f ${floppybase}?${suffix} 103 104 # create tar file 105 # 106 dd if=/dev/zero of=${floppy} bs=8k count=1 2>/dev/null 107 ${PAX} -O -w ${files} >> ${floppy} || exit 1 108 # XXX: use pax metafile and set perms? 109 if [ -n "$instboot" ]; then 110 instboot=$( echo $instboot | sed -e s/@IMAGE@/${floppy}/ ) 111 echo "Running instboot: ${instboot}" 112 eval ${instboot} || exit 1 113 fi 114 115 # check size against available number of disks 116 # 117 bytes=$( ls -l "${floppy}" | awk '{print $5}' ) 118 blocks=$(roundup ${bytes} 512) 119 # when calculating numdisks, take into account: 120 # a) the image already has an 8K tar header prepended 121 # b) each floppy needs an 8K tar volume header 122 numdisks=$(roundup ${blocks}-16 ${floppysize}-16) 123 if [ -z "${maxdisks}" ]; then 124 maxdisks=${numdisks} 125 fi 126 127 if [ ${numdisks} -gt ${maxdisks} ]; then 128 excess=$(( ( ${blocks} - (${floppysize} - 16) * ${maxdisks} ) * 512 )) 129 echo 1>&2 \ 130 "$prog: Image is ${excess} bytes ($(( ${excess} / 1024 )) KB)"\ 131 "too big to fit on ${maxdisks} disk"$(plural ${maxdisks}) 132 exit 1 133 fi 134 135 padsize=$(( ${floppysize} * ${maxdisks} )) 136 padcount=$(( ${padsize} - ${blocks} )) 137 if [ -n "${pad}" ]; then 138 echo \ 139 "Writing $(( ${padsize} * 512 )) bytes ($(( ${padsize} / 2 )) KB)" \ 140 "on ${numdisks} disk"$(plural ${numdisks})"," \ 141 "padded by $(( ${padcount} * 512 )) bytes" \ 142 "($(( ${padcount} / 2 )) KB)" 143 else 144 echo "Writing ${bytes} bytes ($(( ${blocks} / 2 )) KB)"\ 145 "on ${numdisks} disk"$(plural ${numdisks})"," \ 146 "free space $(( ${padcount} * 512 )) bytes" \ 147 "($(( ${padcount} / 2 )) KB)" 148 fi 149 150 # write disks 151 # 152 curdisk=1 153 image= 154 seek=0 155 skip=0 156 floppysize8k=$(( ${floppysize} / 16 )) 157 while [ ${curdisk} -le ${numdisks} ]; do 158 image="${floppybase}${curdisk}${suffix}" 159 echo "Creating disk ${curdisk} to ${image}" 160 if [ ${curdisk} -eq 1 ]; then 161 : > ${image} 162 else 163 echo USTARFS ${curdisk} > ${image} 164 fi 165 count=$(( ${floppysize8k} - ${seek} )) 166 dd bs=8k conv=sync seek=${seek} skip=${skip} count=${count} \ 167 if=${floppy} of=${image} 2>/dev/null 168 169 curdisk=$(( ${curdisk} + 1 )) 170 skip=$(( $skip + $count )) 171 seek=1 172 done 173 174 # pad last disk if necessary 175 # 176 if [ -n "${pad}" ]; then 177 dd if=$image of=$image conv=notrunc conv=sync bs=${floppysize}b count=1 178 fi 179 180 181 # final status 182 # 183 echo "Final result:" 184 ls -l ${floppybase}?${suffix} 185 186 exit 0 187
Indexes created Sun Oct 12 09:09:55 GMT 2025