child.c

基于网络编程的例子

/*
 * child.c - Simple fork usage
 */
#include <unistd.h>
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>

int main(void)
{
    pid_t child;

    if((child = fork()) == -1) {
	perror("fork");
	exit(EXIT_FAILURE);
    } else if(child == 0) {
	puts("in child");
	printf("\tchild pid = %d\n", getpid());
	printf("\tchild ppid = %d\n", getppid());
	exit(EXIT_SUCCESS);
    } else {
	puts("in parent");
	printf("\tparent pid = %d\n", getpid());
	printf("\tparent ppid = %d\n", getppid());
    }
    exit(EXIT_SUCCESS);
}