mirror of
https://github.com/RasppleII/a2cloud.git
synced 2024-11-23 07:34:38 +00:00
82 lines
2.4 KiB
Bash
82 lines
2.4 KiB
Bash
#! /bin/bash
|
|
# vim: set tabstop=4 shiftwidth=4 expandtab filetype=sh:
|
|
|
|
# follows gzip syntax -- acts in place if filename provided, outputs to
|
|
# stdout with -c, accepts stdin and outputs to stdout if filename is - or absent
|
|
|
|
# output to stdout?
|
|
if [[ "$1" == "-c" ]]; then
|
|
shift;
|
|
stdout=1;
|
|
else
|
|
stdout=
|
|
fi
|
|
|
|
# use stdin?
|
|
if [[ ! $1 || "$1" == "-" ]]; then
|
|
stdin=1
|
|
stdout=1
|
|
elif [[ $1 && ! -f "$1" ]]; then
|
|
echo "usage: dopo [-c] [-|140KdiskImageFilename] 1>&2";
|
|
exit 1;
|
|
else
|
|
stdin=
|
|
fi
|
|
|
|
if [[ ! $stdout ]]; then
|
|
#get filename extension, in lowercase
|
|
f="$(tr [:upper:] [:lower:] <<< ${1##*.})";
|
|
|
|
#if it's dsk/do/po, get name without extension
|
|
[[ "$f" == "dsk" || "$f" == "do" || "$f" == "po" ]] && of="${1%.*}" || of="$1";
|
|
|
|
#if name had .po extension, append .dsk to outfile name, otherwise append .po
|
|
[[ "$f" == "po" ]] && of="$of.dsk" || of="$of.po"
|
|
|
|
# set outfile param for dd
|
|
ofile="$of"
|
|
else
|
|
ofile="/tmp/$$.dopo_out"
|
|
fi
|
|
|
|
if [[ ! $stdin ]]; then
|
|
# set infile param for dd
|
|
ifile="$1"
|
|
elif [[ -t 0 ]]; then
|
|
echo "usage: dopo [-c] [-|140KdiskImageFilename]" 1>&2; exit 1;
|
|
else
|
|
ifile="/tmp/$$.dopo_in"
|
|
cat > "$ifile"
|
|
fi
|
|
|
|
# verify file is 140K by successfully reading 140K'th byte, and failing to read the one past
|
|
[[ $(dd if="$ifile" of=/dev/null bs=1 skip=143359 2>&1 | tail -1 | cut -d ' ' -f 1) -ne 1 || $(dd if="$ifile" of=/dev/null bs=1 skip=143360 2>&1 | tail -1 | cut -d ' ' -f 1) -ne 0 ]] && badInput=1 || badInput=
|
|
|
|
if [[ $badInput ]]; then
|
|
if [[ ! $stdin ]]; then
|
|
echo -n "$1 doesn't appear to be a 140K image. Continue? " 1>&2;
|
|
read
|
|
[[ ${REPLY:0:1} == "y" || ${REPLY:0:1} == "Y" ]] || exit 1;
|
|
else
|
|
echo "warning: Input file doesn't appear to be a 140K image." 1>&2
|
|
echo " Output file is likely to be useless." 1>&2
|
|
fi
|
|
fi
|
|
|
|
# for each track
|
|
for t in {0..34}; do
|
|
# read each sector in the right sequence to make (or unmake)
|
|
# valid ProDOS blocks (sector pairs)
|
|
for s in 0 14 13 12 11 10 9 8 7 6 5 4 3 2 1 15; do
|
|
# copy the sector from the old file to the new one
|
|
dd if="$ifile" of="$ofile" bs=256 count=1 skip=$(( t*16 + s )) seek=$(( t*16 + (s==0 || s==15 ? s : 15-s) )) 2> /dev/null
|
|
done
|
|
done
|
|
|
|
# remove the old one
|
|
[[ ! $stdin && ! $stdout ]] && rm "$1" &> /dev/null
|
|
|
|
# dump to stdout if -c or stdin used
|
|
[[ $stdout ]] && { cat $ofile; rm $ofile &> /dev/null; }
|
|
[[ $stdin ]] && rm $ifile &> /dev/null;
|