www.pudn.com > gzip_win.zip > znew.in

: 
#!/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.$$ 
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