EnumDir in Obey files

I want to be able to call EnumDir in an obey file and pass to it a parameter. The problem I’m having is that when I call it, no output is produced. For example, if I run

EnumDir @ list/txt <$0>

where $0 has the value *, list/txt is empty (but if I miss out the parameter altogether, the result is as expected). I’ve tried various combinations of angle brackets and none, but list/txt remains empty. What’s going on?

Oh, and can I get the value of an environment variable in a BBC BASIC program? For example, if I want to open a file in, say, Wimp$ScrapDir?

EnumDir @ list/txt %0

Enumdir <Wimp$ScrapDir> list/txt %0

or to the screen

EnumDir @ vdu: %0

can I get the value of an environment variable in a BBC BASIC program? For example, if I want to open a file in, say, Wimp$ScrapDir?

You can use the environment variable in the BASIC code:

file%=OPENOUT ( “<Wimp$Scrapdir>.” + filename$ )

Or if you want to copy the value of an environment variable into a BASIC variable, then use SYS"OS_ReadVarVal"

Thanks for the help. I’ve been implementing a “retype” command so you can type

retype */jpg JPEG

Note that you can use a wildcard with the EnumDir pattern.

For example, your retype example could be:

retype */jp* JPEG

Grrr, just noticed the OPENOUT line in my earlier post had been swallowed by the forum :-( Fixed.