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High Voltage Shareware
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high1.zip
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high1
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DIR40
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GNUZIP_.ZIP
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ZNEW.IN
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1993-03-28
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3KB
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114 lines
:
#!/bin/sh
check=0
pipe=0
opt=
files=
keep=0
block=1024
# block is the disk block size (best guess, need not be exact)
for arg
do
case "$arg" in
-*) opt="$opt $arg";;
*) files="$files $arg";;
esac
done
if test -z "$files"; then
echo 'recompress .Z files into .z (gzip) files'
echo usage: `echo $0 | sed 's,^.*/,,'` "[-tv9P]" file.Z...
echo " -t tests the new files before deleting originals"
echo " -v be verbose"
echo " -9 use the slowest compression method (optimal compression)"
echo " -K keep a .Z file when it is smaller than the .z file"
if touch -r foo$$ 2>/dev/null; then
echo " -P use pipes for the conversion"
else
echo " -P use pipes for the conversion (does not preserve timestamp)"
fi
rm -f foo$$
exit 1
fi
opt=`echo $opt | sed -e 's/ //g' -e 's/-//g'`
case "$opt" in
*t*) check=1; opt=`echo $opt | sed 's/t//g'`
esac
case "$opt" in
*K*) keep=1; opt=`echo $opt | sed 's/K//g'`
esac
case "$opt" in
*P*) pipe=1; opt=`echo $opt | sed 's/P//g'`
esac
if test -n "$opt"; then
opt="-$opt"
fi
for i in $files; do
n=`echo $i | sed 's/.Z$//'`
if test ! -f $n.Z ; then
echo $n.Z not found
exit 1
fi
old=`wc -c < $n.Z`
if test $pipe -eq 1; then
if gzip -d < $n.Z | gzip $opt > $n.z; then
# Copy time stamp from old file to new one, if possible.
touch -r $n.Z $n.z 2> /dev/null
else
echo error while recompressing $n.Z
exit 1
fi
else
if test $check -eq 1; then
if cp -p $n.Z $n.$$ 2> /dev/null || cp $n.Z $n.$$; then
:
else
echo cannot backup $n.Z
exit 1
fi
fi
if gzip -d $n.Z; then
:
else
test $check -eq 1 && mv $n.$$ $n.Z
echo error while uncompressing $n.Z
exit 1
fi
if gzip $opt $n; then
:
else
test $check -eq 1 && mv $n.$$ $n.Z
echo error while recompressing $n
exit 1
fi
fi
new=`wc -c < $n.z`
if test $keep -eq 1 -a `expr \( $old + $block - 1 \) / $block` -lt \
`expr \( $new + $block - 1 \) / $block`; then
if test $pipe -eq 1; then
rm -f $n.z
elif test $check -eq 1; then
mv $n.$$ $n.Z && rm -f $n.z
else
gzip -d $n.z && compress $n && rm -f $n.z
fi
echo "$n.Z smaller than $n.z -- unchanged"
elif test $check -eq 1; then
if gzip -t $n.z ; then
rm -f $n.$$ $n.Z
else
test $pipe -eq 0 && mv $n.$$ $n.Z
rm -f $n.z
echo error while testing $n.z, $n.Z unchanged
exit 1
fi
elif test $pipe -eq 1; then
rm -f $n.Z
fi
done
exit 0