fork2.c

LINUX C编程实战这本书附带光盘的原代码

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

int main(void)
{
	pid_t   pid;
	char *  msg;
	int     k;

	printf("Process Creation Study\n");

	pid = fork();

	switch(pid) {
		case 0:
			msg = "Child process is running";
			k = 3;
			break;
		case -1:
			perror("Process creation failed\n");
			break;
		default:
			msg = "Parent process is running";
			k=5;
			break;
	}
	
	while(k > 0)
	{
		puts(msg);
		sleep(1);
		k--;
	}

	exit(0);
}