[Info-vax] /END=label

[John Reagan]

On Monday, August 27, 2018 at 2:56:56 AM UTC-4, Marc Van Dyck wrote:
> One last question - for now - maybe...
> 
> In the DCL READ command, there is a qualifier /END that branches the
> current procedure to a label if an end of file condition has been
> reached.
> 
> Is there a - possibly undocumented - way to implement something similar
> in a user-written program implemented as a DCL command ?
> 
> -- 
> Marc Van Dyck

The best you have it write a program that uses LIB$GET_SYMBOL, LIB$SET_SYMBOL, and/or return something via $STATUS and then have the DCL query the symbol and branch as desired.  A program cannot control DCL's command processing flow from inside the program.