Tip: using backticks

[barrymavin]

Rob,

As it turns out, the reason is that running operating system commands is OS specific.

As i mentioned in a previous reply, I have cygwin installed on windows.

On windows you need to do it like this:

? "`cmd /c date /t`"
? "`cmd /c dir`"

You are running cmd.exe which requires interactive input. You cannot run that using backpacks or the run command in Lianja.

I will look into the crash but it makes no sense anyway to try and run an interactive command shell from within Lianja.

If you have any issues like that with Lianja submit a ticket and the issue will be dealt with in due course.

[barrymavin]

Rob,

I see no crash whatsoever.

The interactive command window is probably behind the Lianja App Builder window.

[phabio]

Yes Barry, this work fine!

thanks
Fabio

[josipradnik]

To summarize:

After select/copy/paste these examples in Console workspace on usual Windows:

? "`cmd /c date /t`"    // works OK

? "Date is `date`"     // does not work

Barry uses cygwin and both commands work for him.
If it is not easy to find backtick on the keyboard, the code for backtick is ALT+96

Josip

[rcahoon]

Barry,

I've tested the proper formatted commands using back ticks and they work as expected.

On further investigation I've found that it appears that when I "run cmd" from Lianja, it is cmd.exe that is hanging. Lianja is simply waiting for cmd.exe to finish. If I shut down cmd.exe from task manager, Lianja continues just fine.

So the crash is definitely an issue with my system and, as you say, since I have no reason to ever need to this in my code, it's not even an issue.

Once again, thanks for you efforts.

Cheers,

Rob C

[barrymavin]

I have simplified this behavior on Windows in Lianja 3.4RC14. You now no longer need to specify cmd /c you can just use the backticks but remember that the command itself must be a valid windows command that produces output.

? "The date is `date /t`"