回收子进程是书本537页的内容

在tiny.c文件加以下代码,记得重新编译哦

书中提到CGI是在动态内容中的,所以题目的意思应该是在动态内容里面回收

void handler1(int sig)
{
	int olderrno = errno;
	
	while (waitpid(-1,NULL,0)>0){
		Sio_puts("Handler reaped child\n");
	}
	if(errno != ECHILD)
		Sio_error("waitpid error");
	Sleep(1);
	errno = olderrno;
}
/*
void serve_dynamic(int fd, char *filename, char *cgiargs) 
{
    char buf[MAXLINE], *emptylist[] = { NULL };

    /* Return first part of HTTP response */
    sprintf(buf, "HTTP/1.0 200 OK\r\n"); 
    Rio_writen(fd, buf, strlen(buf));
    sprintf(buf, "Server: Tiny Web Server\r\n");
    Rio_writen(fd, buf, strlen(buf));
    if(signal(SIGCHLD,handler1) == SIG_ERR)
    	unix_error("signal error");
    if (Fork() == 0) { /* Child */ //line:netp:servedynamic:fork
	/* Real server would set all CGI vars here */
	setenv("QUERY_STRING", cgiargs, 1); //line:netp:servedynamic:setenv
	Dup2(fd, STDOUT_FILENO);         /* Redirect stdout to client */ //line:netp:servedynamic:dup2
	Execve(filename, emptylist, environ); /* Run CGI program */ //line:netp:servedynamic:execve
    }
    /*Wait(NULL);  Parent waits for and reaps child */ //line:netp:servedynamic:wait
}