Author:ce123(http://blog.csdn.net/ce123)
信号机制是类UNIX体系中的一种重要的进程间通讯手法之一。咱们常常运用信号来向一个进程发送一个简略的音讯。例如:假定咱们发动一个进程经过socket读取长途主机发送过来的网络数据包,此刻因为网络要素当时主机还没有收到相应的数据,当时进程被设置为可中止等候状况(TASK_INTERRUPTIBLE),此刻咱们现已失掉耐性,想提前结束这个进程,所以能够经过kill指令想这个进程发送KILL信号,内核会唤醒该进程,履行它的信号处理函数,KILL信号的默许处理是退出该进程。当然并不是一定要进程处于TASK_INTERRUPTIBLE状况时才能够处理信号。
别的应用程序能够经过signal()等函数来为一个信号设置默许处理函数。例如当用户按下CTRL+C时,shell将会宣布SIGINT信号,SIGINT的默许处理函数是履行进程的退出代码,可是下面的比如把SIGINT的响应函数设置为int_handler。
print?
- #include
- #include
- voidint_handler(intsignum)
- {
- printf(“\nSIGINTsignalhandler.\n”);
- printf(“exit.\n”);
- exit(-1);
- }
- intmain()
- {
- signal(SIGINT,int_handler);
- printf(“int_handlersetforSIGINT\n”);
- while(1)
- {
- printf(“gotosleep.\n”);
- sleep(60);
- }
- return0;
- }
当履行上面这段代码时,先履行main函数,设置SIGINT的处理函数,并进入睡觉状况,进程进入可中止等候状况:
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” />
按下CTRL+C后,进程会被唤醒履行SIGINT的处理函数int_handler()这个函数,进程会退出。