Experimental Physics and
Industrial Control System

"J. Lewis Muir" <[email protected]> · Tue, 07 Feb 2012 12:27:11 -0600

On 2/7/12 11:57 AM, John Dobbins wrote:
> I have built a stand alone sequencer (2.0.11) application,
> something that is intended to be launched, run once and exit. I
> launch the program with the -s option to create an iocsh.
> 
> The program runs and operates as expected but after the program
> exits the behavior of the x-terminal from which the program was
> launched is altered. For example, pressing the 'enter' generates
> a new prompt but without a line-feed. If I type "reset" at the
> x-terminal command prompt I can restore normal operation of the
> x-terminal.
> 
> The final state of the program is:
> 
>     state finish {
>         entry {
>             ps_enable = 0;
>             pvPut( ps_enable, SYNC);
>         printf("rampTiSp cleanup\n");
>          }
>          when(delay(2)) {
>             exit(0);
>      } state finish
>     }
> 
> There are two state sets.
> 
> Is there a better way to exit the program?

Hi, John.

I would think that would be fine.

Does a soft IOC built against the same EPICS Base exit OK?

You could try calling epicsExit instead of the standard C
library exit.

You could try the new Sequencer (2.1.4) and see if it has the
same problem.

Also, the new Sequencer has a "when" transition "exit" keyword
to indicate the program should exit.  The documentation notes
that if running under an IOC shell, only the SNL program exits,
not the whole IOC.  But if one wants to exit the IOC, it
suggests placing the standard C library exit function call in
the global exit block of the SNL program.  I doubt this would
make a difference, but you could try it.

For example:

  ...

  ss SomeStateSet {

    ...

    state finish {
      entry {
        ps_enable = 0;
        pvPut( ps_enable, SYNC);
        printf("rampTiSp cleanup\n");
      }
      when(delay(2)) {
      } exit
    }
  }

  exit {
    exit(0);
  }

Lewis

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System