How to send messages or data to a running C program from Qt GUI?

[JoeCFD]

I use QProcess to launch a C executable and am able to get stdout output from this C code. Now I want to send some info from my QtGui code to the running C code. How do I do it? Thanks in advance.

[koahnig]

@JoeCFD

That example page might give you an idea.

[jsulm]

@JoeCFD Does this C application expect data from stdin or via IPC?

[JoeCFD]

Thanks for you reply. IPC

[JoeCFD]

@koahnig thanks

[jsulm]

@JoeCFD Which one? There are different IPC methods.

[JoeCFD]

@jsulm said in How to send messages or data to a running C program from Qt GUI?:

@JoeCFD Which one? There are different IPC methods.

FIFO

[jsulm]

@JoeCFD There is nothing special for that in Qt as it is actually file IO.
See https://stackoverflow.com/questions/3861948/how-do-i-read-a-fifo-named-pipe-line-by-line-from-a-c-qt-linux-app