home *** CD-ROM | disk | FTP | other *** search
- #!/bin/sh
-
- PATH="/gnu/bin:$PATH"; export PATH
- 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)"
- tmp=/tmp/zfoo.$$
- echo hi > $tmp.1
- echo hi > $tmp.2
- if test -z "`(${CPMOD-cpmod} $tmp.1 $tmp.2) 2>&1`"; then
- cpmod=${CPMOD-cpmod}
- warn=""
- fi
-
- if test -z "$cpmod" && ${TOUCH-touch} -r $tmp.1 $tmp.2 2>/dev/null; then
- cpmod="${TOUCH-touch}"
- cpmodarg="-r"
- warn="(does not preserve file modes)"
- fi
-
- # check if GZIP env. variable uses -S or --suffix
- gzip -q $tmp.1
- ext=`echo $tmp.1* | sed "s|$tmp.1||"`
- rm -f $tmp.[12]*
- if test -z "$ext"; then
- echo znew: error determining gzip extension
- exit 1
- fi
- if test "$ext" = ".Z"; then
- echo znew: cannot use .Z as gzip extension.
- exit 1
- fi
-
- for arg
- do
- case "$arg" in
- -*) opt="$opt $arg"; shift;;
- *) break;;
- esac
- done
-
- if test $# -eq 0; then
- echo "recompress .Z files into $ext (gzip) files"
- echo usage: `echo $0 | sed 's,^.*/,,'` "[-tv9KP]" file.Z...
- echo " -t tests the new files before deleting originals"
- echo " -v be verbose"
- echo " -9 use the slowest compression method (optimal compression)"
- echo " -K keep a .Z file when it is smaller than the $ext file"
- echo " -P use pipes for the conversion $warn"
- exit 1
- fi
-
- opt=`echo "$opt" | sed -e 's/ //g' -e 's/-//g'`
- case "$opt" in
- *t*) check=1; opt=`echo "$opt" | sed 's/t//g'`
- esac
- case "$opt" in
- *K*) keep=1; opt=`echo "$opt" | sed 's/K//g'`
- esac
- case "$opt" in
- *P*) pipe=1; opt=`echo "$opt" | sed 's/P//g'`
- esac
- if test -n "$opt"; then
- opt="-$opt"
- fi
-
- for i do
- n=`echo $i | sed 's/.Z$//'`
- if test ! -f "$n.Z" ; then
- echo $n.Z not found
- res=1; continue
- fi
- test $keep -eq 1 && old=`wc -c < "$n.Z"`
- if test $pipe -eq 1; then
- if gzip -d < "$n.Z" | gzip $opt > "$n$ext"; then
- # Copy file attributes from old file to new one, if possible.
- test -n "$cpmod" && $cpmod $cpmodarg "$n.Z" "$n$ext" 2> /dev/null
- else
- echo error while recompressing $n.Z
- res=1; continue
- fi
- else
- if test $check -eq 1; then
- if cp -p "$n.Z" "$n.$$" 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
- if test $check -eq 1; then
- mv "$n.$$" "$n.Z" && rm -f "$n"
- echo error while recompressing $n
- else
- # compress $n (might be dangerous if disk full)
- echo error while recompressing $n, left uncompressed
- fi
- res=1; continue
- fi
- fi
- test $keep -eq 1 && new=`wc -c < "$n$ext"`
- 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$ext"
- elif test $check -eq 1; then
- mv "$n.$$" "$n.Z" && rm -f "$n$ext"
- else
- gzip -d "$n$ext" && compress "$n" && rm -f "$n$ext"
- fi
- echo "$n.Z smaller than $n$ext -- unchanged"
-
- elif test $check -eq 1; then
- if gzip -t "$n$ext" ; then
- rm -f "$n.$$" "$n.Z"
- else
- test $pipe -eq 0 && mv "$n.$$" "$n.Z"
- rm -f "$n$ext"
- echo error while testing $n$ext, $n.Z unchanged
- res=1; continue
- fi
- elif test $pipe -eq 1; then
- rm -f "$n.Z"
- fi
- done
- exit $res
-