NAME
	Exists

    SYNOPSIS
	Exists -  determine, if a file exists  - Requires v37

    INPUTS
	"FILE/A,NAME/S,FULL/S"

    DESCRIPTION

	Get one filename on Commandline
	and write to StdOut if it exists

	Exists gets a filename and outputs if it exists.

	The resulting string is sent to STDOUT.

    RESULT
	if NAME is set the filename if the file exists,
	or empty string if not else 1/0
    

	
	    

    NOTES
	* CLI - only

	* should compile with SAS-C
	

    BUGS

	We use 'Lock' to check the file, so an exclusively
	locked file is not recognized.

	We currently do not set ERROR_FILE_NOT_FOUND if
	Exists does not find a file
    

    EXAMPLES

	>Exists Sys:
	1

	>Exists c:copy NAME
	c:copy

	>Exists jabba:the:hutt
	0
    

    HISTORY

	20-03-94 b_noll created
	03-02-95 b_noll created (had forgotten the first version =8-})
	11-02-95 b_noll added FULL Keyword
	20-02-95 b_noll restructured source
	21-02-95 b_noll added version/format-prefix/offset
	20-03-95 b_noll added args diagnostics
	19-08-95 b_noll created .data file
    

    AUTHOR
	Bernd Noll, Brunnenstrasse 55, D-67661 Kaiserslautern
	noll@student.uni-kl.de