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The code to pad floppies could sometimes overwrite the end of the kernel

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(causing the decompress to generate random data).
I've changed it to pad using:
	dd if=xx.fs of=xx.fs conv=sync conv=notrunc bs=${floppysize}b count=1
which isn't subject to rounding errors!
This might be the fix for PR/25552
This commit is contained in:
dsl 2004-06-12 18:39:53 +00:00
parent 4605dd7457
commit 3d7f966def
1 changed files with 6 additions and 10 deletions
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16
distrib/common/buildfloppies.sh
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@ -1,6 +1,6 @@
#!/bin/sh
#
# $NetBSD: buildfloppies.sh,v 1.7 2003/11/09 23:44:48 lukem Exp $
# $NetBSD: buildfloppies.sh,v 1.8 2004/06/12 18:39:53 dsl Exp $
#
# Copyright (c) 2002-2003 The NetBSD Foundation, Inc.
# All rights reserved.
@ -151,34 +151,30 @@ fi
#
curdisk=1
image=
seek=0
skip=0
floppysize8k=$(( ${floppysize} / 16 ))
while [ ${curdisk} -le ${numdisks} ]; do
image="${floppybase}${curdisk}${suffix}"
echo "Creating disk ${curdisk} to ${image}"
if [ ${curdisk} -eq 1 ]; then
seek=0
skip=0
: > ${image}
else
seek=1
skip=$(( (${curdisk} - 1) * (${floppysize8k} - 1) + 1 ))
echo USTARFS ${curdisk} > ${image}
fi
count=$(( ${floppysize8k} - ${seek} ))
# echo 1>&2 " DEBUG: disk ${curdisk} seek=${seek} skip=${skip} count=${count}"
dd bs=8k conv=sync seek=${seek} skip=${skip} count=${count} \
if=${floppy} of=${image} 2>/dev/null
curdisk=$(( ${curdisk} + 1 ))
skip=$(( $skip + $count ))
seek=1
done
# pad last disk if necessary
#
if [ -n "${pad}" ]; then
padseek=$(( ${floppysize} - ${padcount} ))
# echo 1>&2 " DEBUG: padding ${image} with $(( ${padcount} * 512 )) at offset $(( ${padseek} * 512 ))"
dd seek=${padseek} count=${padcount} \
if=/dev/zero of=${image} 2>/dev/null
dd if=$image of=$image conv=notrunc conv=sync bs=${floppysize}b count=1
fi