NetBSD/gnu/usr.bin/gzip-1.0.7/znew.in

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:
#!/bin/sh
check=0
pipe=0
opt=
files=
keep=0
res=0
old=0
new=0
block=1024
# block is the disk block size (best guess, need not be exact)
warn="(does not preserve modes and timestamp)"
echo hi > zfoo1$$
echo hi > zfoo2$$
if test -z "`(${CPMOD-cpmod} zfoo1$$ zfoo2$$) 2>&1`"; then
cpmod=${CPMOD-cpmod}
warn=""
fi
if test -z "$cpmod" && ${TOUCH-touch} -r zfoo1$$ zfoo2$$ 2>/dev/null; then
cpmod="${TOUCH-touch}"
cpmodarg="-r"
warn="(does not preserve file modes)"
fi
rm -f zfoo[12]$$
for arg
do
case "$arg" in
-*) opt="$opt $arg";;
*) files="$files $arg";;
esac
done
if test -z "$files"; then
echo 'recompress .Z files into .z (gzip) files'
echo usage: `echo $0 | sed 's,^.*/,,'` "[-tv9P]" file.Z...
echo " -t tests the new files before deleting originals"
echo " -v be verbose"
echo " -9 use the slowest compression method (optimal compression)"
echo " -K keep a .Z file when it is smaller than the .z file"
echo " -P use pipes for the conversion $warn"
exit 1
fi
opt=`echo "$opt" | sed -e 's/ //g' -e 's/-//g'`
case "$opt" in
*t*) check=1; opt=`echo "$opt" | sed 's/t//g'`
esac
case "$opt" in
*K*) keep=1; opt=`echo "$opt" | sed 's/K//g'`
esac
case "$opt" in
*P*) pipe=1; opt=`echo "$opt" | sed 's/P//g'`
esac
if test -n "$opt"; then
opt="-$opt"
fi
for i in $files; do
n=`echo $i | sed 's/.Z$//'`
if test ! -f $n.Z ; then
echo $n.Z not found
res=1; continue
fi
test $keep -eq 1 && old=`wc -c < $n.Z`
if test $pipe -eq 1; then
if gzip -d < $n.Z | gzip $opt > $n.z; then
# Copy file attributes from old file to new one, if possible.
test -n "$cpmod" && $cpmod $cpmodarg $n.Z $n.z 2> /dev/null
else
echo error while recompressing $n.Z
res=1; continue
fi
else
if test $check -eq 1; then
if cp -p $n.Z $n.$$ 2> /dev/null || cp $n.Z $n.$$; then
:
else
echo cannot backup $n.Z
res=1; continue
fi
fi
if gzip -d $n.Z; then
:
else
test $check -eq 1 && mv $n.$$ $n.Z
echo error while uncompressing $n.Z
res=1; continue
fi
if gzip $opt $n; then
:
else
test $check -eq 1 && mv $n.$$ $n.Z
echo error while recompressing $n
res=1; continue
fi
fi
test $keep -eq 1 && 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
res=1; continue
fi
elif test $pipe -eq 1; then
rm -f $n.Z
fi
done
exit $res