Knowledge Base Nr: 00129 kbstick.c - http://www.swe-kaiser.de

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Linux: Tastendrücke unter X simulieren/schicken

  
//g++ kbstick.c -o kbstick -lncurses -I/usr/X11R6/include -L/usr/X11R6/lib -lX11 -lXtst

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <unistd.h>

#include <X11/Xlib.h>
#include <X11/extensions/XTest.h>
#include <X11/keysym.h>

#include <signal.h>

Display* ourXDisplay = 0;

const int delayForSend = 10;	/* Delay in mSec for sending key msgs */


Display* getXDisplay(const char* appName) {

  int ourEvent, ourError, ourMajor, ourMinor;

  Display* ourDisplay = XOpenDisplay(0);

  if (! ourDisplay) {
    printf("\n ERROR: This program is made to be run in X Windows.\n\n");
    exit(1);
  }
  if (! XTestQueryExtension(ourDisplay, &ourEvent, &ourError, &ourMajor, &ourMinor) ) {
    printf("%s: ", appName);
    printf("XServer %s doesn't support the Xtest extensions we need...\n", DisplayString(ourDisplay));
    XCloseDisplay(ourDisplay);
    exit(1);
  }
  printf("\nServer %s supports XTest (version %d.%d). Good.\n\n", DisplayString(ourDisplay), ourMajor, ourMinor);

  XSync( ourDisplay, True);

  return ourDisplay;
}


void doXKey(Display* ourDisplay, const int keyToSend)
{
    XTestFakeKeyEvent(ourDisplay, (unsigned int)keyToSend, True, delayForSend);
    XTestFakeKeyEvent(ourDisplay, (unsigned int)keyToSend, False, delayForSend);
}


void doShiftXKey(Display* ourDisplay, const int keyToSend)
{
    XTestFakeKeyEvent(ourDisplay, (unsigned int)63, True, delayForSend);  //Shift_L
    XTestFakeKeyEvent(ourDisplay, (unsigned int)keyToSend, True, delayForSend);
    XTestFakeKeyEvent(ourDisplay, (unsigned int)keyToSend, False, delayForSend);
    XTestFakeKeyEvent(ourDisplay, (unsigned int)63, False, delayForSend); //Shift_L
}


void doAltXKey(Display* ourDisplay, const int keyToSend)
{
    XTestFakeKeyEvent(ourDisplay, (unsigned int)77, True, delayForSend);  //Alt_L
    XTestFakeKeyEvent(ourDisplay, (unsigned int)keyToSend, True, delayForSend);
    XTestFakeKeyEvent(ourDisplay, (unsigned int)keyToSend, False, delayForSend);
    XTestFakeKeyEvent(ourDisplay, (unsigned int)77, False, delayForSend); //Alt_L
}


void doCtrlXKey(Display* ourDisplay, const int keyToSend)
{
    XTestFakeKeyEvent(ourDisplay, (unsigned int)76, True, delayForSend);  //Control_L
    XTestFakeKeyEvent(ourDisplay, (unsigned int)keyToSend, True, delayForSend);
    XTestFakeKeyEvent(ourDisplay, (unsigned int)keyToSend, False, delayForSend);
    XTestFakeKeyEvent(ourDisplay, (unsigned int)76, False, delayForSend); //Control_L
}


void cleanup(const int signal)
{
  XCloseDisplay(ourXDisplay);
  printf("\nExiting on signal.\n");
  exit(0);
}


int main(int argc, char *argv[])
{
  printf("\nKBStick v0.7  GPL (c) 2000 by David A. Fulgham\n");

  ourXDisplay = getXDisplay(argv[0]);

  signal(SIGINT, cleanup);
  signal(SIGTERM, cleanup);

  sleep(2);

  char szKeysym[50];

  strcpy(szKeysym, argv[1]);

  KeyCode kc;
  KeySym ks;

  ks = XStringToKeysym(szKeysym);
  if( ks == NoSymbol )
  {
    printf("Unable to resolve keysym for '%s'\n", szKeysym);
    exit (0);
  }

  kc = XKeysymToKeycode(ourXDisplay, ks );
  printf("String '%s' maps to keysym '%d'\n", szKeysym, ks );
  printf("String '%s' maps to keycode '%d'\n", szKeysym, kc );

  //doXKey(ourXDisplay, kc);
  //doShiftXKey(ourXDisplay, kc);
  //doAltXKey(ourXDisplay, kc);

  doCtrlXKey(ourXDisplay, kc);

//  doXKey(ourXDisplay, XK_B);
//  doXKey(ourXDisplay, XK_Z);
//  doXKey(ourXDisplay, XK_0);
//  doXKey(ourXDisplay, XK_1);
//  doXKey(ourXDisplay, XK_9);
//  doXKey(ourXDisplay, XK_F1);

  sleep(2);

  XCloseDisplay(ourXDisplay);

  printf("\nExiting normally.\n\n");
  exit(0);
}