wok-6.x rev 12557
linux: update bootloader.sh
| author | Pascal Bellard <pascal.bellard@slitaz.org> |
|---|---|
| date | Sat Apr 28 13:25:47 2012 +0200 (2012-04-28) |
| parents | 66e38bd6a132 |
| children | 873a0ed5aab7 |
| files | linux/stuff/bootloader.sh |
line diff
1.1 --- a/linux/stuff/bootloader.sh Sat Apr 28 13:23:21 2012 +0200 1.2 +++ b/linux/stuff/bootloader.sh Sat Apr 28 13:25:47 2012 +0200 1.3 @@ -9,218 +9,260 @@ 1.4 usage() 1.5 { 1.6 cat <<EOT 1.7 -Usage: $0 bzImage [--prefix image_prefix] [--cmdline 'args'] 1.8 +Usage: $0 bzImage [--prefix image_prefix] 1.9 + [--format 1200|1440|1680|1920|2880|... ] [--mem mb] 1.10 [--rdev device] [--video mode] [--flags rootflags] [--tracks cnt] 1.11 - [--format 1440|1680|1920|2880 ] [--initrd initrdfile]... 1.12 + [--cmdline 'args'] [--dont-edit-cmdline] [--no-syssize-fix] 1.13 + [--address-initrd address] [--initrd initrdfile]... 1.14 1.15 -Default values: --format 1440 --tracks 80 --prefix floppy. 1.16 - 1.17 -Or: cat fd0*.img | $0 --extract 1.18 - 1.19 -Create the kernel, cmdline and rootfs files from a floppy set 1.20 +Default values: --format 1440 --tracks 80 --rdev /dev/fd0 --prefix floppy. --mem 16 1.21 1.22 Example: 1.23 -$0 /boot/vmlinuz-2.6.30.6 --rdev /dev/ram0 --video -3 \ 1.24 ---cmdline 'rw lang=fr_FR kmap=fr-latin1 laptop autologin' \ 1.25 ---initrd /boot/rootfs.gz --initrd ./myconfig.gz 1.26 +$0 /boot/bzImage --rdev /dev/ram0 --video -3 --cmdline 'rw lang=fr_FR kmap=fr-latin1 laptop autologin' --initrd /boot/rootfs.gz --initrd ./myconfig.gz 1.27 EOT 1.28 exit 1 1.29 } 1.30 1.31 -ddq() 1.32 +KERNEL="" 1.33 +INITRD="" 1.34 +ADRSRD="" 1.35 +CMDLINE="" 1.36 +PREFIX="floppy." 1.37 +FORMAT="1440" 1.38 +RDEV="" 1.39 +VIDEO="" 1.40 +FLAGS="" 1.41 +TRACKS="80" 1.42 +MEM="16" 1.43 +NOEDIT="" 1.44 +NOSYSSIZEFIX="" 1.45 +DEBUG="" 1.46 +while [ -n "$1" ]; do 1.47 + case "${1/--/-}" in 1.48 + -c*) CMDLINE="$2"; shift;; 1.49 + -i*) INITRD="$INITRD $2"; shift;; 1.50 + -a*) ADRSRD="$2"; shift;; 1.51 + -h*) HEAP="$2"; shift;; 1.52 + -l*) LOADERTYPE="$2"; shift;; 1.53 + -p*) PREFIX="$2"; shift;; 1.54 + -fl*)FLAGS="$2"; shift;; # 1 read-only, 0 read-write 1.55 + -f*) FORMAT="$2"; shift;; 1.56 + -m*) MEM="$(echo $2 | sed 's/[^0-9]//g')"; shift;; 1.57 + -r*) RDEV="$2"; shift;; 1.58 + -v*) VIDEO="$2"; shift;; # -3 .. n 1.59 + -t*) TRACKS="$2"; shift;; # likely 81 .. 84 1.60 + -n*) NOSYSSIZEFIX="1";; 1.61 + -debug) DEBUG="1";; 1.62 + -d*) NOEDIT="1";; 1.63 + *) KERNEL="$1";; 1.64 + esac 1.65 + shift 1.66 +done 1.67 +[ -n "$KERNEL" -a -f "$KERNEL" ] || usage 1.68 +while [ -L "$KERNEL" ]; do KERNEL="$(readlink "$KERNEL")"; done 1.69 +if [ $(( $FORMAT % $TRACKS )) -ne 0 ]; then 1.70 + echo "Invalid track count for format $FORMAT." 1.71 + usage 1.72 +fi 1.73 +[ 0$MEM -lt 4 ] && MEM=4 1.74 +[ $MEM -gt 16 ] && MEM=16 1.75 + 1.76 +ddq() { dd $@ 2> /dev/null; } 1.77 + 1.78 +patch() 1.79 { 1.80 - dd $@ 2> /dev/null 1.81 + echo -en $(echo ":$2" | sed 's/:/\\x/g') | \ 1.82 + ddq bs=1 conv=notrunc of=$3 seek=$((0x$1)) 1.83 + [ -n "$DEBUG" ] && echo "patch $1 $2 $4" 1>&2 1.84 } 1.85 1.86 -dbg() 1.87 +# usage: store bits offset data file 1.88 +store() 1.89 { 1.90 - [ -n "$DEBUG" ] && echo "$@" 1>&2 1.91 + n=$3; for i in $(seq 8 8 $1); do 1.92 + printf '\\\\x%02X' $(($n & 255)) 1.93 + n=$(($n >> 8)) 1.94 + done | xargs echo -en | ddq bs=1 conv=notrunc of=$4 seek=$(($2)) 1.95 + [ -n "$DEBUG" ] && printf "store%d(%03X) = %0$(($1/4))X %s\n" $1 $2 $3 "$5" 1>&2 1.96 } 1.97 1.98 -# write a 32 bits data 1.99 -# usage: put offset data32 file [bytes] 1.100 -put() 1.101 +# usage: getlong offset file 1.102 +getlong() 1.103 { 1.104 - n=$2; for i in $(seq 1 ${4:-4}); do 1.105 - printf '\\\\x%02X' $(($n & 255)) 1.106 - n=$(($n >> 8)) 1.107 - done | xargs echo -en | ddq bs=1 conv=notrunc of=$3 seek=$1 1.108 - [ -n "$DEBUG" ] && printf "put$4(%04X) = %X\n" $1 $2 1>&2 1.109 + ddq if=$2 bs=1 skip=$(($1)) count=4 | hexdump -e '"" 1/4 "%d" "\n"' 1.110 } 1.111 1.112 -# read a 32 bits data 1.113 -# usage: get offset file [bytes] 1.114 -get() 1.115 +error() 1.116 { 1.117 - ddq if=$2 bs=1 skip=$(($1)) count=${3:-4} | hexdump -e '"" 1/4 "%d"' 1.118 + echo $@ 1>&2 1.119 + rm -f $bs 1.120 + exit 1 1.121 } 1.122 1.123 -SetupSzOfs=0x1F1 1.124 -SyssizeOfs=0x1F4 1.125 -RamfsLenOfs=0x21C 1.126 -ArgPtrOfs=0x228 1.127 - 1.128 floppyset() 1.129 { 1.130 # bzImage offsets 1.131 - CylinderCount=0x1F0 1.132 - FlagsOfs=0x1F2 1.133 - VideoModeOfs=0x1FA 1.134 - RootDevOfs=0x1FC 1.135 - CodeAdrOfs=0x214 1.136 + SetupSzOfs=497 1.137 + FlagsOfs=498 1.138 + VideoModeOfs=506 1.139 + RootDevOfs=508 1.140 + Magic=0x202 1.141 RamfsAdrOfs=0x218 1.142 + RamfsLenOfs=0x21C 1.143 1.144 # boot+setup address 1.145 SetupBase=0x90000 1.146 1.147 - stacktop=0x9E00 1.148 - 1.149 bs=/tmp/bs$$ 1.150 1.151 # Get and patch boot sector 1.152 - # See http://hg.slitaz.org/wok/raw-file/711d076b277c/linux/stuff/linux-header-2.6.34.u 1.153 + # See http://hg.slitaz.org/wok/file/66e38bd6a132/linux/stuff/linux-header.u 1.154 + [ -n "$DEBUG" ] && echo "Read bootsector..." 1>&2 1.155 ddq if=$KERNEL bs=512 count=1 of=$bs 1.156 + 1.157 + [ $(( $(getlong 0x1FE $bs) & 0xFFFF )) -eq 43605 ] || 1.158 + error "Not bootable" 1.159 + 1.160 uudecode <<EOT | ddq of=$bs conv=notrunc 1.161 begin-base64 644 - 1.162 -/L+6nWgAkAcGF4n8McC5HQDzq1sfD6mg8X1ABlfFd3ixBvOlZWaPR3gGH8ZF 1.163 -+D/6l1hB6DQBvgACA3QO6HYBWwseKAJ0LFNH6AoBXuhmAbAgzRCwCM0QTuhl 1.164 -ATwIdAOIBK05NigCdPDoPgE8CnXgiHz+ieb/TBD/TBi/9AGBTRz/gMdFMACc 1.165 -sBCxBUi0k4lEHLABiUQUmGaY0+BIZgMFZtPoaAAQB7+AACn4nHMCAccx21BW 1.166 -6J4AXrkAgLSH/kQczRVYnXfcoRoCvxwCsQk4RBxyuJPNE+oAACCQsEYoyL7b 1.167 -AejSAF3rI4D5E3IEOMF3a4D+AnIEOOZ3bGCB/QAGdCoGUlFTlrQCULEGtQTB 1.168 -xQSwDyHoBJAnFEAn6IwA/s117LAgzRDitOiWAJjNE2FSUCjIdwKwAZg5+HIC 1.169 -ifhQtALNE5VeWFpyoJVBjuGAxwJPdFFOdfSM4ZU4wXVFiMj+xrEBOOZ1O4j0 1.170 -/sW2AID9UHIwOi7wAXIqtQBgvt4B/kQMU+gxAFvoOAB1FlKYzRO4AQLNE1rQ 1.171 -1Dpk/nXqRgjkdeVh64sWB7AxLAO0DrsHAM0QPA1088OwDejv/6wIwHX4w79s 1.172 -BLFbZQINuA0BZToNdArNFnT0mM0Wju9Hw1g6AEluc2VydCBkaXNrIDEuBw0A 1.173 -AA== 1.174 +/L+4nWgAkBeJ/BYHMcC5HgDzq1sfD6Gg8X1AxXd4BlexBvOlFh9kZo9HeMZF 1.175 ++D/6l1hB6DwBvgACgUwQIIDGRCWbA3QO6GoBWwseKAJ0LFNH6AYBXuhaAbAg 1.176 +zRCwCM0QTuhZATwIdAOIBK05NigCdPDoMgE8CnXgiHz+W4nm/0gQxkAVk4Dz 1.177 +CHX0u/QBoRUCsQVmix9mS2bT60NoAAgHv4AAiXwTiUQbAfjR7yn7nHMCAd9Q 1.178 +V1ZTMdvongBbXlmGzbSHFgfNFVidd9ChGQK7HAKxCTlEG3K6l80T6gAAIJCw 1.179 +RijIvtgB6MoAXesjgPkTcgQ4wXdrgP4CcgQ45ndsYIH9AAZ0KgZSUVOWtAJQ 1.180 +sQa1BMHFBLAPIegEkCcUQCfohAD+zXXssCDNEOK06I4AmM0TYVJQKMh3ArAB 1.181 +mDn4cgKJ+FC0As0TlV5YWnKglUGO6YDHAk90S0519IzplTjBdT+IyP7GsQE4 1.182 +5nU1iPT+xYD9ULYAdSq1AGC+2wH+RAxT6C8AW+g2AHUWUpjNE7gBAs0TWtDU 1.183 +OmT+depGCOR15WHrkbAxLAO0DrsHAM0QPA1088OwDejv/6wIwHX4w79sBLFb 1.184 +ZAINuA0BZDoNdArNFnT0mM0WjudHw1g6AEluc2VydCBkaXNrIDEHDQA= 1.185 ==== 1.186 EOT 1.187 - 1.188 # Get setup 1.189 - setupsz=$(get $SetupSzOfs $bs 1) 1.190 + setupsz=$(( $(getlong $SetupSzOfs $bs) & 0xFF )) 1.191 + if [ $setupsz -eq 0 ]; then 1.192 + setupsz=4 1.193 + store 8 $SetupSzOfs $setupsz $bs "setup size $setupsz" 1.194 + fi 1.195 + [ -n "$DEBUG" ] && echo "Read setup ($setupsz sectors) ..." 1>&2 1.196 ddq if=$KERNEL bs=512 skip=1 count=$setupsz >> $bs 1.197 1.198 - if [ -n "$TRACKS" ]; then 1.199 - dbg -n "--tracks " 1.200 - put $CylinderCount $TRACKS $bs 1 1.201 + Version=$(( $(getlong 0x206 $bs) & 0xFFFF )) 1.202 + [ $(getlong $Magic $bs) -ne 1400005704 ] && Version=0 1.203 + feature="" 1.204 + while read prot kern info ; do 1.205 + [ $Version -lt $((0x$prot)) ] && continue 1.206 + feature="features $prot starting from kernel $kern " 1.207 + done <<EOT 1.208 +200 1.3.73 kernel_version, bzImage, initrd, loadflags/type_of_loader 1.209 +201 1.3.76 heap_end_ptr 1.210 +202 2.4.0 new cmdline 1.211 +204 2.6.14 long syssize 1.212 +EOT 1.213 + [ -n "$DEBUG" ] && printf "Protocol %X $feature\n" $Version 1>&2 1.214 + 1.215 + # Old kernels need bootsector patches to disable rescent features 1.216 + while read minversion maxversion offset bytes rem; do 1.217 + [ $Version -gt $(( 0x$maxversion )) ] && continue 1.218 + [ $Version -lt $(( 0x$minversion )) ] && continue 1.219 + patch $offset $bytes $bs "$rem" 1.220 + done <<EOT 1.221 +000 1FF 08D B8:00:01 force zImage (movw \$0x100, %ax) 1.222 +000 1FF 0CB EB:0B skip initrd code 1.223 +000 201 01E EB:1E:00:00:00:00 room for the cmdline magic 1.224 +000 201 036 BE:00:00:E8:76:01:EB:0A:06:57:B1:06:F3:A5:EB:DE code in cmdline magic moved 1.225 +000 1FF 039 90:90:90 no kernel version 1.226 +000 201 04B 22:00 old cmdline ptr 1 1.227 +000 201 06D 22:00 old cmdline ptr 2 1.228 +000 203 1F6 00:00 syssize32 1.229 +200 FFF 210 FF type_of_loader=FF 1.230 +201 FFF 224 00:9B heap_end_ptr 1.231 +EOT 1.232 + if [ $Version -lt 514 ]; then 1.233 + version_string=$((0x200 + ($(getlong 0x20E $bs) & 65535) )) 1.234 + store 16 0x0037 $version_string $bs version_string 1.235 fi 1.236 - if [ -n "$FLAGS" ]; then 1.237 - dbg -n "--flags " 1.238 - put $FlagsOfs $FLAGS $bs 2 1.239 + if [ $Version -ge 512 -a $(getlong 0x214 $bs) -ge $((0x100000)) ]; then 1.240 + patch 211 81 $bs loadflags=can_use_heap+loadhigh 1.241 + patch 09D 10 $bs LOADSEG=0x1000 1.242 + patch 0A0 00:01 $bs LOADSZ=0x10000 1.243 fi 1.244 - if [ -n "$VIDEO" ]; then 1.245 - dbg -n "--video " 1.246 - put $VideoModeOfs $VIDEO $bs 2 1.247 - fi 1.248 - if [ -n "$RDEV" ]; then 1.249 - dbg -n "--rdev " 1.250 - n=$(stat -c '0x%02t%02T' $RDEV 2> /dev/null) 1.251 - [ -n "$n" ] || n=$RDEV 1.252 - put $RootDevOfs $n $bs 2 1.253 + [ -n "$CMDLINE" ] || patch 04D EB $bs "No cmdline" 1.254 + [ -n "$NOEDIT" ] && patch 059 0D:46:EB:14 $bs 'mov CR,%al ; inc %si; jmp putal' 1.255 + [ 1$TRACKS -ne 180 ] && store 8 0x171 $TRACKS $bs TRACKS 1.256 + 1.257 + [ -n "$FLAGS" ] && store 16 $FlagsOfs $FLAGS $bs FLAGS 1.258 + [ -n "$VIDEO" ] && store 16 $VideoModeOfs $VIDEO $bs VIDEO 1.259 + [ -n "$RDEV" ] || case "$FORMAT" in 1.260 + 1200) RDEV=0x0208 ;; 1.261 + 1440) RDEV=0x021C ;; 1.262 + 2880) RDEV=0x0220 ;; 1.263 + *) RDEV=0x0200 ;; 1.264 + esac 1.265 + while [ -L "$RDEV" ]; do RDEV="$(readlink "$RDEV")"; done 1.266 + [ -b "$RDEV" ] && RDEV=$(stat -c '0x%02t%02T' $RDEV 2> /dev/null) 1.267 + store 16 $RootDevOfs $RDEV $bs RDEV 1.268 + 1.269 + # Store cmdline after setup 1.270 + if [ -n "$CMDLINE" ]; then 1.271 + echo -n "$CMDLINE" | ddq bs=512 count=1 conv=sync >> $bs 1.272 + CmdlineOfs=0x9E00 # Should be in 0x8000 .. 0xA000 1.273 + ArgPtrOfs=0x228 1.274 + ArgPtrVal=$(( $SetupBase + $CmdlineOfs )) 1.275 + if [ $Version -lt 514 ]; then 1.276 + ArgPtrOfs=0x0020 1.277 + ArgPtrVal=$(( 0xA33F + ($CmdlineOfs << 16) )) 1.278 + fi 1.279 + store 32 $ArgPtrOfs $ArgPtrVal $bs "Cmdline '$CMDLINE'" 1.280 fi 1.281 1.282 - # Store cmdline after setup 1.283 - if [ -n "$CMDLINE" ]; then 1.284 - dbg -n "--cmdline '$CMDLINE' " 1.285 - echo -n "$CMDLINE" | ddq bs=512 count=1 conv=sync >> $bs 1.286 - put $ArgPtrOfs $(( $SetupBase + $stacktop )) $bs 1.287 - fi 1.288 - 1.289 - # Compute initramfs size 1.290 + # Compute initramfs size (protocol >= 2.00) 1.291 + [ $Version -lt 512 ] && INITRD="" 1.292 initrdlen=0 1.293 - padding=0 1.294 +INITRDPAD=4 1.295 +INITRDALIGN=0x1000 1.296 for i in $( echo $INITRD | sed 's/,/ /' ); do 1.297 [ -s "$i" ] || continue 1.298 - dbg "--initrd $i " 1.299 - initrdlen=$(( $initrdlen + $padding )) 1.300 - padding=$(stat -c %s $i) 1.301 - initrdlen=$(( $initrdlen + $padding )) 1.302 - padding=$(( 4096 - ($padding & 4095) )) 1.303 - [ $padding -eq 4096 ] && padding=0 1.304 + while [ -L "$i" ]; do i="$(readlink $i)"; done 1.305 + size=$(( ($(stat -c %s "$i") + $INITRDPAD - 1) & -$INITRDPAD )) 1.306 + [ -n "$DEBUG" ] && echo "initrd $i $size " 1>&2 1.307 + initrdlen=$(( $initrdlen + $size )) 1.308 + [ -n "$ADRSRD" ] || ADRSRD=$(( (($MEM * 0x100000) - $initrdlen) & -$INITRDALIGN )) 1.309 + store 32 $RamfsAdrOfs $(( $ADRSRD )) $bs initrd adrs 1.310 + store 32 $RamfsLenOfs $initrdlen $bs initrdlen 1.311 done 1.312 - Ksize=$(( $(get $SyssizeOfs $bs)*16 )) 1.313 - Kpad=$(( (($Ksize+4095)/4096)*4096 - Ksize )) 1.314 - if [ $initrdlen -ne 0 ]; then 1.315 - dbg "initrdlen = $initrdlen " 1.316 - Kbase=$(get $CodeAdrOfs $bs) 1.317 - put $RamfsAdrOfs \ 1.318 - $(( (0x1000000 - $initrdlen) & 0xFFFF0000 )) $bs 1.319 - put $RamfsLenOfs $(( ($initrdlen + 3) & -4 )) $bs 1.320 - fi 1.321 + 1.322 + [ -n "$NOSYSSIZEFIX" ] || store 32 0x1F4 \ 1.323 + $(( ($(stat -c %s $KERNEL)+15)/16 - ($setupsz+1)*32)) $bs fix system size 1.324 1.325 # Output boot sector + setup + cmdline 1.326 ddq if=$bs 1.327 1.328 # Output kernel code 1.329 - ddq if=$KERNEL bs=512 skip=$(( $setupsz + 1 )) 1.330 - 1.331 - # Pad to next sector 1.332 - Kpad=$(( 512 - ($(stat -c %s $KERNEL) & 511) )) 1.333 - [ $Kpad -eq 512 ] || ddq if=/dev/zero bs=1 count=$Kpad 1.334 + syssz=$(( ($(getlong 0x1F4 $bs)+31)/32 )) 1.335 + cat $KERNEL /dev/zero | ddq bs=512 skip=$(( $setupsz+1 )) count=$syssz 1.336 1.337 # Output initramfs 1.338 - padding=0 1.339 for i in $( echo $INITRD | sed 's/,/ /' ); do 1.340 [ -s "$i" ] || continue 1.341 - [ $padding -ne 0 ] && ddq if=/dev/zero bs=1 count=$padding 1.342 ddq if=$i 1.343 - padding=$(( 4 - ($(stat -c %s $i) & 3) )) 1.344 - [ $padding -eq 4 ] && padding=0 1.345 + padding=$(( $INITRDPAD - ($(stat -c %s $i) % $INITRDPAD) )) 1.346 + [ $padding -eq $INITRDPAD ] || ddq if=/dev/zero bs=1 count=$padding 1.347 done 1.348 1.349 # Cleanup 1.350 rm -f $bs 1.351 } 1.352 1.353 -KERNEL="" 1.354 -INITRD="" 1.355 -CMDLINE="" 1.356 -PREFIX="floppy." 1.357 -FORMAT="1440" 1.358 -RDEV="" 1.359 -VIDEO="" 1.360 -FLAGS="" 1.361 -TRACKS="" 1.362 -DEBUG="" 1.363 -while [ -n "$1" ]; do 1.364 - case "${1/--/-}" in 1.365 - -c*) CMDLINE="$2"; shift;; 1.366 - -i*) INITRD="$INITRD $2"; shift;; 1.367 - -p*) PREFIX="$2"; shift;; 1.368 - -fl*) FLAGS="$2"; shift;; # 1 read-only, 0 read-write 1.369 - -f*) FORMAT="$2"; shift;; 1.370 - -r*) RDEV="$2"; shift;; # /dev/??? 1.371 - -v*) VIDEO="$2"; shift;; # -3 .. n 1.372 - -t*) TRACKS="$2"; shift;; # likely 81 .. 84 1.373 - -d*) DEBUG="1";; 1.374 - -e*) ddq bs=512 count=2 > kernel 1.375 - setupsz=$(get $SetupSzOfs kernel 1) 1.376 - ddq bs=512 count=$(($setupsz - 1)) >> kernel 1.377 - [ $(get $ArgPtrOfs kernel) -ne 0 ] && 1.378 - ddq bs=512 count=1 | strings > cmdline 1.379 - syssz=$(get $SyssizeOfs kernel) 1.380 - ddq bs=512 count=$(( ($syssz + 31) / 32 )) >> kernel 1.381 - ddq bs=16 seek=$(($syssz + 32 + $setupsz*32)) count=0 of=kernel 1.382 - ramsz=$(get $RamfsLenOfs kernel) 1.383 - ddq bs=512 count=$((($ramsz + 511) / 512)) of=rootfs 1.384 - ddq bs=1 seek=$ramsz count=0 of=rootfs 1.385 - exit ;; 1.386 - *) KERNEL="$1";; 1.387 - esac 1.388 - shift 1.389 -done 1.390 -[ -n "$KERNEL" -a -f "$KERNEL" ] || usage 1.391 -[ -n "$TRACKS" ] && [ $(( $FORMAT % $TRACKS )) -ne 0 ] && 1.392 - echo "Invalid track count for format $FORMAT." && usage 1.393 - 1.394 if [ "$FORMAT" == "0" ]; then # unsplitted 1.395 floppyset > $PREFIX 1.396 + PAD=$(( 512 - ($(stat -c %s $PREFIX) % 512) )) 1.397 + [ $PAD -ne 512 ] && ddq if=/dev/zero bs=1 count=$PAD >> $PREFIX 1.398 exit 1.399 fi 1.400 floppyset | split -b ${FORMAT}k /dev/stdin floppy$$ 1.401 i=1 1.402 -ls floppy$$* | while read file ; do 1.403 +ls floppy$$* 2> /dev/null | while read file ; do 1.404 output=$PREFIX$(printf "%03d" $i) 1.405 cat $file /dev/zero | ddq bs=1k count=$FORMAT conv=sync of=$output 1.406 echo $output