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From: Martin <News04@avisoft.f9.co.uk>
Newsgroups: comp.sys.acorn.programmer
Subject: Re: Name of a program
Date: Fri, 17 Apr 2026 16:52:38 +0100
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In article <5ccaee3398bob@sick-of-spam.invalid>,
   Bob Latham <bob@sick-of-spam.invalid> wrote:
> The nearest I've got is to intercept vector 5 and if you double
> click a Basic file it will set the variable and you're good to go.

Have you have done an OS_Claim,5 in another program, before
double-clicking the program you are wanting to find the name of? 
Beware that adds an overhead on EVERY command that is issued until the
OS_Release,5.  And there can be many hundreds of them!

> But, if you drop into Basic and then load the basic program then
> no-go.

That is to be expected... 

Double-clicking a any file (BASIC, Absolute, Utility, Command, Jpeg,
etc) will result in an command: 
    Run <pathname><filename>
This issues another command depending on the hex file type. For a
BASIC program this is:
    @RunType_FFB <pathname><filename>
The Alias$@RunType_FFB for a BASIC program then issues command
    Basic -quit "<pathname><filename>"

All these three  are OS commands, and will pass through the OS_CLI
vector 5, and will be seen by anything intercepting that vector at
that time.

However, when in interactive BASIC, a 
    LOAD filename 
is a BASIC command, and NOT an OS command, so it is not seen by the
OS_CLI vector. The last OS command issued is just BASIC.
Issuing a *command or OSCLI("command") would be an OS command.

Note that all the OS commands issued can be seen easily if my Reporter
is running - see www.avisoft.f9.co.uk   

> I'm concluding this can't be done.

Yes it can, if what you want is the filename of the running program...

If the program that is actually running issues an OS_GetEnv SWI you
get returned the address of the OS command which started that program.
It will include the full <pathname><filename>, and is exactly the same
as passed to OS_CLI and passes through the vector.

Therefore...
If you have double-clicked a BASIC program <filename> it will show
    Basic -quit <pathname><filename>
If in interactive BASIC it will still just show BASIC after a LOAD.

No Claim for OSCLI vector 5 is required.

Does that help?

-- 
Martin Avison 
Note that unfortunately this email address will become invalid
without notice if (when) any spam is received.