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