fork3.c

此源码是著名的教材BeginningLinux Programming中文名字叫Linux程序设计书中的源代码

#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>

int main(void)
{
	pid_t  pid;

	pid = fork();
	switch(pid) {
		case 0:
			while(1)
			{
				printf("A background process, PID:%d\n, ParentID: %d\n",getpid(),getppid());
				sleep(3);
			}
		case -1:
			perror("Process creation failed\n");
			exit(-1);
		default:
			printf("I am parent process,my pid is %d\n",getpid());
			exit(0);
	}

	return 0;
}