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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
-