#include <stdio.h>
#include <unistd.h>

int main(int argc, char const *argv[]){
	printf("%s,parent:%d,current:%d\n", "start", getppid(), getpid());
	pid_t fpid;
	fpid = fork();
	if (fpid < 0){ //error
		printf("%s:%d\n", "error", fpid);
	}else if (fpid == 0){ //child
		printf("%s,parent:%d,current:%d, fpid:%d\n", "child", getppid(), getpid(), fpid);
	}else{ //host
		printf("%s,parent:%d,current:%d, fpid:%d\n", "host", getppid(), getpid(), fpid);
	}
	return 0;
}