$stdin.gets, threads, and command-line app.

[Xav Xav]

Hi,

I am currently working on a console-based app, in which the user
interacts by entering commands from within a prompt (e.g. sort of a
bash-like app).
One thread for the prompt, some others for computation.
I allowed those threads to output to the console, but it leads to a
really not user-friendly behaviour. Example:

prompt: lis <- started to type in the "list" command
Blablabla from Thread1 <- output to $stdin by threads
prompt: <- The prompt is re-displayed, the command
"seems" lost

prompt: list <- Type again the command "list"
Error: lislist: Unknown command

See my problem?
How can I get the exact text line to be displayed after a thread output
its message? Or How can I catch a partially typed input?
I thought of syscalls, but didn't get any results yet.

[Note: Obviously, if I had only input "t" after the thread had
displayed, my command would have been correctly interpreted]

 

[Mark]

I think your problem is the same as the one I posted a few hours ago.

Please look for subject "Trouble using puts and getc in different threads".

Mark

 

[.x av]

By not using threads.

In this problem, one should consider the output generated by the threads
is not context-sensitive (or command-sensitive). It is a monitoring app,
I do need to be informed of any event in realtime (by "outputting" to
the console) while not messing up my input (or messing it up the least
possible )

I hope I made myself a little clearer.


But I suppose you're right. I'll try building of a single-threaded-IO
based architecture. Thinking of it, maybe callback procedures may
help...

 

[Eero Saynatkari]

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Hi,
=20
I am currently working on a console-based app, in which the user=20
interacts by entering commands from within a prompt (e.g. sort of a=20
bash-like app).

If you are working on a shell, you are welcome to help with rs[1]. If
you are just doing it for learning purposes or implementing a command-
line program, you can use HighLine[2]

[1] http://projects.kittensoft.org/rs/rdoc/index.html
[2] http://highline.rubyforge.org

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