#include <stdio.h>
#include <stdlib.h>
#include <wiringPi.h>
#include <unistd.h>
#include <sys/utsname.h>
#include <signal.h>
#include <sys/wait.h>
#include <sys/types.h>
void blink1(int *arr, int i);
void blink2 (int *arr, int i);
pid_t k1, k2;
int main(){
int i=0;
wiringPiSetup();
int status[3]={0,2,3};
for (int m=0; m<3;m++){
pinMode(status[m], OUTPUT);
}
if(fork() ==0){
if (fork() == 0){
k2 = getpid();
printf("Kind 2: %d\n", getpid
());
blink2(status, i);
} else {
k1 = getpid();
printf("Kind 1: %d\n", getpid
());
blink1(status, i);
}
}else{
printf("Eltern: %d\n", getpid
());
for (int j = 0; j<3;j++){
sleep(4);
system("ps -o pid,ppid,state,time,command");
}
wait(&k1);
kill(k2, SIGKILL);
for (int m=0;m<3;m++){
pinMode(status[m], 0);
}
}
return 0;
}
void blink1(int *arr,int i){
for(int m = 0; m<5;m++) {
digitalWrite(arr[i%3],1);
sleep(1);
digitalWrite(arr[i%3],0);
sleep(1);
}
}
void blink2(int *arr,int i){
while(1){
digitalWrite(arr[i%3],1);
sleep(1);
digitalWrite(arr[i%3],0);
sleep(1);
i++;
}
}
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