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

: 
#!/bin/sh 
# sh is buggy on RS/6000 AIX 3.2. Replace above line with #!/bin/ksh 
 
# Zcmp and zdiff are used to invoke the cmp or the  diff  pro- 
# gram  on compressed files.  All options specified are passed 
# directly to cmp or diff.  If only 1 file is specified,  then 
# the  files  compared  are file1 and an uncompressed file1.gz. 
# If two files are specified, then they are  uncompressed  (if 
# necessary) and fed to cmp or diff.  The exit status from cmp 
# or diff is preserved. 
 
PATH="BINDIR:$PATH"; export PATH 
prog=`echo $0 | sed 's|.*/||'` 
case "$prog" in 
  *cmp) comp=${CMP-cmp}   ;; 
  *)    comp=${DIFF-diff} ;; 
esac 
 
OPTIONS= 
FILES= 
for ARG 
do 
    case "$ARG" in 
    -*)	OPTIONS="$OPTIONS $ARG";; 
     *)	if test -f "$ARG"; then 
            FILES="$FILES $ARG" 
        else 
            echo "${prog}: $ARG not found or not a regular file" 
	    exit 1 
        fi ;; 
    esac 
done 
if test -z "$FILES"; then 
	echo "Usage: $prog [${comp}_options] file [file]" 
	exit 1 
fi 
set $FILES 
if test $# -eq 1; then 
	FILE=`echo "$1" | sed 's/[-.][zZtga]*$//'` 
	gzip -cd "$1" | $comp $OPTIONS - "$FILE" 
	STAT="$?" 
 
elif test $# -eq 2; then 
	case "$1" in 
        *[-.]gz* | *[-.][zZ] | *.t[ga]z) 
                case "$2" in 
	        *[-.]gz* | *[-.][zZ] | *.t[ga]z) 
			F=`echo "$2" | sed 's|.*/||;s|[-.][zZtga]*||'` 
                        gzip -cdfq "$2" > /tmp/"$F".$$ 
                        gzip -cdfq "$1" | $comp $OPTIONS - /tmp/"$F".$$ 
                        STAT="$?" 
			/bin/rm -f /tmp/"$F".$$;; 
 
                *)      gzip -cdfq "$1" | $comp $OPTIONS - "$2" 
                        STAT="$?";; 
                esac;; 
        *)      case "$2" in 
	        *[-.]gz* | *[-.][zZ] | *.t[ga]z) 
                        gzip -cdfq "$2" | $comp $OPTIONS "$1" - 
                        STAT="$?";; 
                *)      $comp $OPTIONS "$1" "$2" 
                        STAT="$?";; 
                esac;; 
	esac 
        exit "$STAT" 
else 
	echo "Usage: $prog [${comp}_options] file [file]" 
	exit 1 
fi