From:
 internet!VALSMTP.RIAG.COM!lberkowitz[SMTP:internet!VALSMTP.RIAG.COM!lberk
owitz]
Subject:  Re: FINFO - How can I determine if a fil

<plug>

If you have MPEX (and if not, why not? it's not expensive; it's very,
very, versatile), you can use the OPENED file attribute on a LISTF and
then check the variable MPEXNUMSUCCEEDED.

Leonard Berkowitz
RIA Group (Warren, Gorham & Lamont)
(617) 292-8349 (E. S. T.)

Actually, since "opened" is a file attribute, you can use the VEFINFO()
function and do everything in one step rather than waste the
time/resources of a %listf AND THEN checking a variable anyway.

In other words, use this syntax:

 %IF VEFINFO(<file-to-test>).OPENED
 %   <do stuff>
 %ENDIF

rather than:

 %LISTF <file-to-test>(OPENED),$NULL
 %IF MPEXNUMSUCCEEDED = 1
 %   <do stuff>
 %ENDIF

On the other hand, if you have to check MULTIPLE files (multiple here
meaning "more than three"), the %LISTF approach may be more appropriate.
______________________________ Reply Separator
Subject: FINFO - How can I determine if a file is in use?
Author:  Rodney Behrendorff <[log in to unmask]> at Internet-Exchange
Date:    11/07/96 2:14 PM


Does anyone know of a simple way to detect if a particular file is in use
(MPE/iX 5.00 on HP3000)?  I want a job (or command for that matter) to
bypass certain steps if a file is being accessed, but FINFO doesn't seem
to provide this information.  "LISTF ,3" shows what I want to know under
"FLAGS:", and even "LISTF ,2" has an asterisk after the filename that
tells me enough information.