[Info-vax] Backup API mailbox oddity

[osuvman50 at gmail.com]

On Wednesday, January 10, 2018 at 1:06:14 PM UTC-5, Stephen Hoffman wrote:
> On 2018-01-10 17:15:55 +0000, osuvman50 at gmail.com said:
> > The easy workaround is to make the application WRITEOF before writing 
> > the file list.
> > 
> > Also if you send BACKUP$START() no files, it gets confused and thinks 
> > you are trying to list a save set.
> 
> I'd try $qio calls on the mailbox and quite possibly an AST-driven read 
> loop. or would maybe use a binary-mode fopen access request.   Or post 
> some code, and we'll have a look.
> 

The reading part is in the bowels BACKUPSHR.EXE from being told the mailbox logical name is the input file.  The writing to the mailbox is an AST-driven write loop via direct $qio calls.