Redirect support on MSX-DOS.

[renatus_xxxx]

When compiling for MSX-DOS (using the -subtype=msxdos option), is it correct to assume that so-called redirects (like 'dir > out.txt') are not supported?

[dom]

They should be enabled by default, you can disable them with the pragma CRT_COMMANDLINE_REDIRECTION=0

Does this question mean that they're not working for you?

[renatus_xxxx]

>Does this question mean that they're not working for you?

Yes, here is the code.
https://github.com/renatus-xxxx/diffly

This is how I built it:
zcc +msx -create-app -O3 -subtype=msxdos diffly.c -bn DIFFLY.COM

Thank you for your response. I really appreciate your help!

[dom]

I think the parser is a little "picky", it looks like you have to have at least one non-redirection argument and there can't be a space between the pipe and the filename.

[renatus_xxxx]

Thanks for your reply, I appreciate it.

It doesn't seem to work with a combination of arguments and redirects, like this for example

diffly original.txt modified.txt > out.txt
diffly > out.txt

Is there anything that you can think of? All source code and executables can be found here
https://github.com/renatus-xxxx/diffly

[stefano]

I think it's the same parser used by CP/M. It got partially jammed after the general crt0 rework if I'm not wrong

[dom]

For my tests this seems to be working:

Code: Select all

#include <stdio.h>


int main(int argc, char **argv)
{
        int i;
        printf("Args count %d\n",argc);

        for ( i = 0; i < argc; i++ ) {
                printf("%d: %s\n",i, argv[i]);
        }

}

Well, subject to my caveats listed above:

Screenshot 2024-10-14 at 22.17.33.png

Ah, yes, I can definitely see a problem now.

[renatus_xxxx]

As you know, there seems to be no problem with the command line arguments, only with the redirection.
If you change the platform to cpm as shown below, the redirection seems to work.

-zcc +msx -create-app -O3 -subtype=msxdos diffly.c -bn DIFFLY.COM
+zcc +cpm -create-app -O3 diffly.c -bn DIFFLY.COM

In other words, there seems to be a problem only with +msx -subtype=msxdos

[dom]

That was a good hint. The handling was different for some reason.

I have a fix including for the blank argument case I found, but I want to do a bit more testing and remove some more limitations.

[stefano]

long ago I tuned the cp/m part a little iirc, but I'm not sure I got it perfectly reacting to all the possible combinations of >, <, >> .

[dom]

With luck it should behave a bit better now.

[renatus_xxxx]

I have tried the Nightly Build version and have confirmed that the redirection issue has not been specifically resolved. cpm version is still fine, but msxdos seems to continue to have the same problem.

[dom]

I only pushed this morning - so after the nightly build!

[renatus_xxxx]

Oops, sorry, I didn't get the fixes in the nightly build yet.

[renatus_xxxx]

I re-built with the latest NightlyBuild version.
I have confirmed that I can redirect from my application on msxdos!
Thanks!!!