Larry Boyd wrote
> On  7 Nov 96 at 14:14, Rodney Behrendorff wrote:
>>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.
>
> :PURGE xyz     :)
>
> Just kidding, but it works and is simple.
>
This is actually a good idea. Whith a proper FILE equation this will
work, as in (cut and edited from one of our jobs):
!file chkfile=<yourfile>;acc=outkeep;save;exc
!setjcw cierror 0
!continue
!purge *chkfile
!if cierror=0
  <file is not accessed>
!else
  <file accessed (or some other error, your'e free to check :-))>
!endif

NOTE<plug?>, this was not my idea originally, I found it in 'Thoughts
and discourses on HP3000 software' by E. Volokh along with lots of other
great ideas.
/per