buildfloppies.sh revision 1.1
1 #!/bin/sh 2 # 3 # $NetBSD: buildfloppies.sh,v 1.1 2002/04/16 04:28:23 lukem Exp $ 4 # 5 # Copyright (c) 2002 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] 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 base basename of generated floppies 54 size size of a floppy in 512 byte blocks 55 file [...] file(s) to build 56 _USAGE_ 57 exit 1 58 } 59 60 plural() 61 { 62 [ $1 -ne 1 ] && echo "s" 63 } 64 65 66 # parse and check arguments 67 # 68 69 while getopts i:m:p opt; do 70 case ${opt} in 71 i) 72 instboot=${OPTARG} ;; 73 m) 74 maxdisks=${OPTARG} ;; 75 p) 76 pad=1 ;; 77 \?|*) 78 usage 79 ;; 80 esac 81 done 82 83 shift $(( ${OPTIND} - 1 )) 84 [ $# -lt 3 ] && usage 85 floppybase=$1 86 floppysize=$2 87 shift 2 88 files=$* 89 90 # setup temp file, remove existing images 91 # 92 floppy=floppy.$$.tar 93 trap "rm -f ${floppy}" 0 1 2 3 # EXIT HUP INT QUIT 94 rm -f ${floppybase}?.fs 95 96 97 # create tar file 98 # 99 dd if=/dev/zero of=${floppy} bs=8k count=1 2>/dev/null 100 ${PAX} -w ${files} >> ${floppy} || exit 1 101 # XXX: use pax metafile and set perms? 102 if [ -n "$instboot" ]; then 103 instboot=$( echo $instboot | sed -e s/@IMAGE@/${floppy}/ ) 104 echo "Running instboot: ${instboot}" 105 eval ${instboot} 106 fi 107 108 # check size against available number of disks 109 # 110 set -- `ls -l ${floppy}` 111 bytes=$5 112 blocks=$(( ${bytes} / 512 )) 113 numdisks=$(( (${blocks} - 1) / ${floppysize} + 1 )) 114 if [ -z "${maxdisks}" ]; then 115 maxdisks=${numdisks} 116 fi 117 118 if [ ${numdisks} -gt ${maxdisks} ]; then 119 excess=$(( ( ${blocks} - ${floppysize} * ${maxdisks} ) * 512 )) 120 echo 1>&2 \ 121 "$prog: Image is ${excess} bytes ($(( ${excess} / 1024 )) KB)"\ 122 "too big to fit on ${maxdisks} disk"$(plural ${maxdisks}) 123 exit 1 124 fi 125 126 if [ -n "${pad}" ]; then 127 padsize=$(( ${floppysize} * ${maxdisks} )) 128 padcount=$(( ${padsize} - ${blocks} )) 129 echo \ 130 "Writing $(( ${padsize} * 512 )) bytes ($(( ${padsize} / 2 )) KB)" \ 131 "on ${numdisks} disk"$(plural ${numdisks})"," \ 132 "padded by $(( ${padcount} * 512 )) bytes" \ 133 "($(( ${padcount} / 2 )) KB)" 134 else 135 echo "Writing ${bytes} bytes ($(( ${blocks} / 2 )) KB)"\ 136 "on ${numdisks} disk"$(plural ${numdisks}) 137 fi 138 139 # write disks 140 # 141 curdisk=1 142 image= 143 floppysize8k=$(( ${floppysize} / 16 )) 144 while [ ${curdisk} -le ${numdisks} ]; do 145 image="${floppybase}${curdisk}.fs" 146 echo "Creating disk ${curdisk} to ${image}" 147 if [ ${curdisk} -eq 1 ]; then 148 seek=0 149 skip=0 150 : > ${image} 151 else 152 seek=1 153 skip=$(( (${curdisk} - 1) * (${floppysize8k} - 1) + 1 )) 154 echo USTARFS ${curdisk} > ${image} 155 fi 156 count=$(( ${floppysize8k} - ${seek} )) 157 # echo 1>&2 " DEBUG: disk ${curdisk} seek=${seek} skip=${skip} count=${count}" 158 dd bs=8k conv=sync seek=${seek} skip=${skip} count=${count} \ 159 if=${floppy} of=${image} 2>/dev/null 160 161 curdisk=$(( ${curdisk} + 1 )) 162 done 163 164 # 165 # XXX: the old bootfloppy generation code used to zero the last 0.5k of the 166 # end of the image in single disk configs; that possibly trashed real 167 # data??? 168 # is that functionality still required? 169 # 170 171 # pad last disk if necessary 172 # 173 if [ -n "${pad}" ]; then 174 padseek=$(( ${floppysize} - ${padcount} )) 175 # echo 1>&2 " DEBUG: padding ${image} with $(( ${padcount} * 512 )) at offset $(( ${padseek} * 512 ))" 176 dd seek=${padseek} count=${padcount} \ 177 if=/dev/zero of=${image} 2>/dev/null 178 fi 179 180 181 # final status 182 # 183 echo "Final result:" 184 ls -l ${floppybase}?.fs 185 186 exit 0 187
Indexes created Sun Oct 12 09:09:55 GMT 2025