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How to detect status of keyboard (solaris)

byan
byan asked
on
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Last Modified: 2013-12-05
Hi, Everyone who can help me,

I need to detect the  status of keyboard. In fact, what I want to know is: how to record the time duration of pressing a key. Getche or getch will accept keyboard input, but as soon as a key is pressed, the function will return a value. I need to realize some functions like DOS keyboard interrupt which can tell me when a key is pressed, when it is released, etc. My working platform is SUN workstation, Solaris 2.5.1

Thanks,

--
Yan, Bo

ECECS Dept. University of CincinnatiC
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ozo
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Commented:
man XQueryKeymap

Author

Commented:
Edited text of question
ozo
CERTIFIED EXPERT
Most Valuable Expert 2014
Top Expert 2015

Commented:
Is your keyboard /dev/kbd?  Try ioctl(kb,KIOCTRANS,TR_NONE )

Author

Commented:
B
PGP gets the interval between key presses (for setting up
randomness). You may want to look at this code.  Also, if
you are programming in X11 you can use events to notify you
when a key has been pressed and released. see XEvent, XAnyEvent
man pages. Also, 2.5.1 comes with Motif in /usr/dt so you can
use the Motif functions to make it easier.

Here's a simple codeblock:

#include <time.h>
#include <X11/Xlib.h>
 
 
void main()
{
    Display *d;
    Window w;
    XEvent e;
    double frac;
    struct timespec time1, time2;
 
    d = XOpenDisplay(NULL);
    w = XCreateSimpleWindow(d, XDefaultRootWindow(d), 10, 10, 100, 100, 2, 0,
0);
    XMapWindow(d, w);
    XSelectInput(d, w, KeyPressMask | KeyReleaseMask);
 
    while (True)
    {
        XNextEvent(d, &e);
 
   
        if (e.type == KeyPress)
            clock_gettime(CLOCK_REALTIME, &time1);
        else if (e.type == KeyRelease) {
            clock_gettime(CLOCK_REALTIME, &time2);
            frac = ((double) time2.tv_nsec - time1.tv_nsec) / 1000000000;
            if (frac < 0) {
                frac++;
                time2.tv_sec--;
            }
            printf("duration %2.2f seconds\n", (double) time2.tv_sec -
                time1.tv_sec + frac);
        }
    }
}

Also, see man -s7 kb, man -s7m kb

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