一个证明signal函数运行机制的函数！

Posted 2020-06-13

 1 #include<stdio.h>
 2 #include<signal.h>
 3 void SignHandler(int iSignNum)
 4 {
 5         printf("\nCapture signal number is:%d\n",iSignNum);
 6 }
 7 int main(void)
 8 {
 9         int i;
10         signal(SIGINT,SignHandler);
11         while(1)
12         {
13                 for(i=0;i<10;i++)
14                 {
15                         printf("%d\n",i);
16                         sleep(1);
17                 }
18 
19         }
20         return 0;
21 }

程序运行结果如下

 1 0
 2 1
 3 2
 4 3
 5 4
 6 5
 7 6
 8 7
 9 8
10 9
11 0
12 1
13 2
14 3
15 4
16 5
17 6
18 7
19 8
20 ^C
21 Capture signal number is:2
22 9
23 0
24 1
25 2
26 3
27 ^C
28 Capture signal number is:2
29 4
30 5
31 6
32 7
33 8
34 9
35 0
36 1
37 ^C
38 Capture signal number is:2
39 2
40 3
41 4
42 5
43 6
44 7
45 8
46 9
47 0
48 1
49 2
50 3
51 ^C
52 Capture signal number is:2
53 4
54 5
55 6
56 7
57 8
58 9
59 0
60 1
61 2
62 3
63 ^\Quit (core dumped)

充分说明了信号相当于另外一个进程？它和主进程不中断