sigset调用函数返回问题。

[空的]

求解：
int flag=0;

main()
{
sigset(SIGALRM, msg_to);
alarm(60);

ret=msqRcv(..........);
if(ret<0 && flag==1)
{
打印。。；
退出或怎么的；
}
....;
}
void msg_to
{
打印啥的;
flag=1;
}

怎么改才能使语句执行到if，而不是一直在那等接受socketid的内容？

[空的]

就是说在socket接受时，一直等不到信息发过来，就一直read ，所以设置了一个alarm，
然后sigset(SIGALRM, msg_to)，希望可以通过这样结束read或继续循环。。

[justkk]

用signal(SIGALRM, msg_to)

[qq120848369]

可以用select取代你的阻塞read.

[LENOVO_]

阻塞的read 你可以设置套接字选项 setsockopt,设置多长时间没有接收到数据就返回

int setsockopt(int socket, int level, int option_name,
const void *option_value, socklen_t option_len);


SO_RCVTIMEO
Sets the timeout value that specifies the maximum amount of time an input function waits until it completes. It accepts a timeval structure with the number of seconds and microseconds specifying the limit on how long to wait for an input operation to complete. If a receive operation has blocked for this much time without receiving additional data, it shall return with a partial count or errno set to [EAGAIN] or [EWOULDBLOCK] if no data is received. The default for this option is zero, which indicates that a receive operation shall not time out. This option takes a timeval structure. Note that not all implementations allow this option to be set.

[至善者善之敌]

[Quote=引用 6 楼 lenovo_ 的回复:]
阻塞的read 你可以设置套接字选项 setsockopt,设置多长时间没有接收到数据就返回

int setsockopt(int socket, int level, int option_name,
const void *option_value, socklen_t option_len);


SO_RCVTIMEO
Sets the timeout v……
[/Quote]

经常这么用，是个折中的方案

[呔妖怪来嘛]

sigset是什么

[至善者善之敌]

socketid ?套接字，你的程序太伪了。。。
伪的。。。都看不明白了