atexit函数的使用【学习笔记】

 1 #include "apue.h"
 2
 3 static void my_exit1(void);
 4 static void my_exit2(void);
 5
 6
 7 int main(void)
 8 {
 9     int ret = -1;
10
11     ret = atexit(my_exit2);
12     if(ret != 0)
13         err_sys("can‘t not register my_exit2\r\n");
14
15     ret = atexit(my_exit1);
16     if(ret != 0)
17         err_sys("can‘t not register my_exit1\r\n");
18
19     ret = atexit(my_exit1);
20     if(ret != 0)
21         err_sys("can‘t not register my_exit1\r\n");
22
23     printf("main done\r\n");
24
25     exit(0);
26
27 }
28
29 static void my_exit1(void)
30 {
31     printf("first exit handler\r\n");
32 }
33 static void my_exit2(void)
34 {
35     printf("second exit handler\r\n");
36 }