hi leute! ich habs jetzt hinbekommen...

Code:
/* A SIMPLE LED CONTROLER
 * you are able to change the led
 * state with a FERNBEDIEHNUNG
 * (C) 2006 --linuxuser--
 * e-mail: unix4ever@gmx.at
 * Version 1.0
 */

#include <sys/ioctl.h>
#include <sys/kd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <termios.h>
#include <ctype.h>
#include <assert.h>

#define OUTPUT "/dev/tty1"
#define INPUT  "/dev/ttyS0"

#define ENDLOS 1
#define FAIL 0
#define SUCC 1

#define BAUDRATE B2400

/*lights*/
#define NOLIGHT  0x0
#define ALLLIGHT 0X7
#define RLIGHT   0X1
#define MLIGHT   0x4
#define LLIGHT   0x2

/*keys on the "FERNBEDIENUNG"*/
#define FBDK_OFF 0xFE06
#define FBDK_CD  0x4015FE33


int setLight(int output, const unsigned int state){
    /*a very primitive method*/
    if(ioctl(output, KDSETLED, state)){
        fprintf(stderr, "KONNTE LICHT NICHT EINSCHALTEN!!!\n");
        return FAIL;
    }/*end if*/

    return SUCC;
}/*end if*/

int main(void){
    int states[5] = {NOLIGHT, ALLLIGHT, RLIGHT, MLIGHT, LLIGHT}; /*all implemented states*/
    int recived_bytes; /*how many bytes have recived?*/
    unsigned int inputByte = 0; /*the byte comes in from the COM1 port*/
    unsigned int buffer = 0;
    int output; /*the keyboard*/
    int input;  /*COM1*/
    struct termios newtio; /*settings for the RS-232 "CONSOL"*/
    int i = 0;

    /*open the input*/
    input = open(INPUT, O_RDWR | O_NOCTTY | O_NDELAY);
    if(input == -1){
        fprintf(stderr, "Fehler beim oeffnen der Seriellen schnittstelle: %s!\n", INPUT);
    }/*end if*/

    /*open the output*/
    output = open(OUTPUT, O_WRONLY);
    if(output == -1){
        fprintf(stderr, "FEHLER bein oeffnen des outputS: %s!\n", OUTPUT);
        return 0;
    }/*end if*/
    
    /*configure the RS-232 port*/
    fcntl(input, F_SETFL, FNDELAY);
    newtio.c_cflag = BAUDRATE | CS8 | CLOCAL | CREAD ;
    newtio.c_iflag = IGNPAR | ICRNL ;
    newtio.c_oflag = 0;
    newtio.c_lflag &= ~(ICANON);
    
    /*set configuration*/
    tcflush(input, TCIOFLUSH);
    tcsetattr(input, TCSANOW, &newtio);  

    /*start the main loop*/
    while(ENDLOS){
        system("clear");
        /*read the input*/
        recived_bytes = read(input, &inputByte, 4);
        /*put the input out on the consol*/
        printf("(c)Rainer Sickinger\nGelesenesBytes: 0x%x\n", inputByte);
        if(buffer != inputByte){
            setLight(output, states[i]);
            i++;
            if(i == 4) i = 0;
        }/*end if*/
        buffer = inputByte;
        sleep(1);
    }/*end while*/
    
    /*close the file deskriptorz*/
    close(input);
    close(output);

    return 0;
}/*end main*/
DANKE nochmal!