最新消息:

关于SIGPIPE

C/C++ admin 2830浏览 0评论

最近在做网络编程,有时候程序会挂掉,调试发现程序收到了SIGPIPE,造成这个信号的原因可以自行google,因为程序收到SIGPIPE的默认动作是终止程序,所以我们需要对这个信号进行屏蔽。

在多进程的环境下,下面代码可以解决问题:

1
2
3
4
5
6
7
8
9
 <span style="color: #993333;">struct</span> sigaction sa<span style="color: #339933;">;</span>
 sa.<span style="color: #202020;">sa_handler</span> <span style="color: #339933;">=</span> SIG_IGN<span style="color: #339933;">;</span>
 sa.<span style="color: #202020;">sa_flags</span> <span style="color: #339933;">=</span> <span style="color: #0000dd;">0</span><span style="color: #339933;">;</span>
 sigemptyset<span style="color: #009900;">(</span><span style="color: #339933;">&amp;</span>amp<span style="color: #339933;">;</span>sa.<span style="color: #202020;">sa_mask</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
 sigaddset<span style="color: #009900;">(</span><span style="color: #339933;">&amp;</span>amp<span style="color: #339933;">;</span>sa.<span style="color: #202020;">sa_mask</span><span style="color: #339933;">,</span>SIGPIPE<span style="color: #009900;">)</span><span style="color: #339933;">;</span>
 <span style="color: #b1b100;">if</span> <span style="color: #009900;">(</span>sigaction<span style="color: #009900;">(</span>SIGPIPE<span style="color: #339933;">,</span> <span style="color: #339933;">&amp;</span>amp<span style="color: #339933;">;</span>sa<span style="color: #339933;">,</span> <span style="color: #0000dd;">0</span><span style="color: #009900;">)</span><span style="color: #009900;">)</span> <span style="color: #009900;">{</span>
  perror<span style="color: #009900;">(</span><span style="color: #ff0000;">"failed to ignore SIGPIPE"</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
  exit<span style="color: #009900;">(</span><span style="color: #339933;">-</span><span style="color: #0000dd;">1</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
 <span style="color: #009900;">}</span>

如果是在多线程的环境下,在创建线程之前需要:

1
2
3
4
5
6
 sigset_t signal_mask<span style="color: #339933;">;</span>
 sigemptyset<span style="color: #009900;">(</span><span style="color: #339933;">&amp;</span>amp<span style="color: #339933;">;</span>signal_mask<span style="color: #009900;">)</span><span style="color: #339933;">;</span>
 sigaddset<span style="color: #009900;">(</span><span style="color: #339933;">&amp;</span>amp<span style="color: #339933;">;</span>signal_mask<span style="color: #339933;">,</span> SIGPIPE<span style="color: #009900;">)</span><span style="color: #339933;">;</span>
 <span style="color: #b1b100;">if</span> <span style="color: #009900;">(</span> pthread_sigmask<span style="color: #009900;">(</span>SIG_BLOCK<span style="color: #339933;">,</span> <span style="color: #339933;">&amp;</span>amp<span style="color: #339933;">;</span>signal_mask<span style="color: #339933;">,</span> NULL<span style="color: #009900;">)</span> <span style="color: #009900;">)</span> <span style="color: #009900;">{</span>
  <span style="color: #000066;">printf</span><span style="color: #009900;">(</span><span style="color: #ff0000;">"block sigpipe error<span style="color: #000099; font-weight: bold;">n</span>"</span><span style="color: #009900;">)</span><span style="color: #339933;">;</span>
 <span style="color: #009900;">}</span>

转载请注明:爱开源 » 关于SIGPIPE

您必须 登录 才能发表评论!