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