Newbie: How to read directly from stdin without \n

[MattHHDE]

Hi
can someone tell me how to read a char from the stdin without waiting for the user pressing return?
I want to start/stop a thread with pressing 1 on the console but the needed return is frustrating...

 

[Salem]

Such a feature is non-standard.
You need to say which OS and compiler you're using.


--

 

[MattHHDE]

Well... a little difficult to answere
I am writing it with the eclipse CDT (currently under windows), useing cygwin and the gcc compiler. The targetsystem would be QNX.

 

[Salem]

Well then you're going to have to resort to conditional compilation.

#if defined(QNX)
int myReadChar ( int fd ) {
}
#elif defined(CYGWIN)
int myReadChar ( int fd ) {
}
#else
#error unknown operating system
#endif

Where you would compile this module using the appropriate

gcc -c -DQNX prog.c
gcc -c -DCYGWIN prog.c

As for what goes inside each of those functions....

This may work for cygwin - see my answer in this post

http://www.tek-tips.com/viewthread.cfm?qid=939697&page=1

As for QNX, I suggest a good read of the manual.

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[jstreich]

CYGWIN will require you to put the terminal in "raw mode" or use curses (does curses require C++ or will it work in C) or other additional library. If you have to put the terminal in raw mode, you will become responsible for echo-ing the chars read to the output stream.

 

[chipperMDW]

> does curses require C++ or will it work in C?

Yes, it's a C library.