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more error handling for dd writes

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This commit is contained in:
Elaina Claus
2024-10-11 11:31:38 -04:00
parent 75c046f9cd
commit d684d4f11f
1 changed files with 25 additions and 6 deletions
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31
scripts/create-disk.sh
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@@ -66,20 +66,39 @@ if [[ "$OSTYPE" == "linux-gnu"* ]]; then
mkfs.fat -v -F32 -n 'STEVIAFS' $firstpart
# copy MBR while preserving partition table
dd if=$mbr_file of=$ld bs=1 count=440
if ! dd if=$mbr_file of=$ld bs=1 count=440; then
echo "Failed to write MBR to disk. (part 1)" >&2
exit 1
fi
# copy MBR 0xAA55
dd if=$mbr_file of=$ld bs=1 seek=510 skip=510 count=2
if ! dd if=$mbr_file of=$ld bs=1 seek=510 skip=510 count=2; then
echo "Failed to write MBR to disk. (part 2)" >&2
exit 1
fi
# copy VBR to partition 1 while preserving partition information
# copy jmp short entry; nop
dd if=$vbr_file of=$firstpart bs=1 count=3
if ! dd if=$vbr_file of=$firstpart bs=1 count=3; then
echo "Failed to write VBR to disk. (part 1)" >&2
exit 1
fi
# copy bootcode
dd if=$vbr_file of=$firstpart bs=1 seek=90 skip=90 count=420
if ! dd if=$vbr_file of=$firstpart bs=1 seek=90 skip=90 count=420; then
echo "Failed to write VBR to disk. (part 2)" >&2
exit 1
fi
# copy 0xAA55
dd if=$vbr_file of=$firstpart bs=1 seek=510 skip=510 count=2
if ! dd if=$vbr_file of=$firstpart bs=1 seek=510 skip=510 count=2; then
echo "Failed to write VBR to disk. (part 3)" >&2
exit 1
fi
#stage2 to sectors 1-64
dd if=$stage2_file of=$ld bs=$disk_sector_size seek=1
if ! dd if=$stage2_file of=$ld bs=$disk_sector_size seek=1; then
echo "Failed to write Stage2 to disk." >&2
exit 1
fi
# copy boot32 boot test file to disk image
if ! [ -e $mount_point ]; then