2 * This test program will register the maximum number of exit functions
3 * with atexit(). When this program exits, each exit function should get
4 * called in the reverse order in which it was registered. (If the system
5 * supports more than 25 exit functions, the function names will loop, but
6 * the effect will be the same. Feel free to add more functions if desired)
11 typedef void (*vfuncp) (void);
13 /* All functions call exit(), in order to test that exit functions can call
14 * exit() without screwing everything up. :)
16 static void exitfunc0(void) { printf("Executing exitfunc0.\n"); exit(0);}
17 static void exitfunc1(void) { printf("Executing exitfunc1.\n"); exit(0);}
18 static void exitfunc2(void) { printf("Executing exitfunc2.\n"); exit(0);}
19 static void exitfunc3(void) { printf("Executing exitfunc3.\n"); exit(0);}
20 static void exitfunc4(void) { printf("Executing exitfunc4.\n"); exit(0);}
21 static void exitfunc5(void) { printf("Executing exitfunc5.\n"); exit(0);}
22 static void exitfunc6(void) { printf("Executing exitfunc6.\n"); exit(0);}
23 static void exitfunc7(void) { printf("Executing exitfunc7.\n"); exit(0);}
24 static void exitfunc8(void) { printf("Executing exitfunc8.\n"); exit(0);}
25 static void exitfunc9(void) { printf("Executing exitfunc9.\n"); exit(0);}
26 static void exitfunc10(void) { printf("Executing exitfunc10.\n"); exit(0);}
27 static void exitfunc11(void) { printf("Executing exitfunc11.\n"); exit(0);}
28 static void exitfunc12(void) { printf("Executing exitfunc12.\n"); exit(0);}
29 static void exitfunc13(void) { printf("Executing exitfunc13.\n"); exit(0);}
30 static void exitfunc14(void) { printf("Executing exitfunc14.\n"); exit(0);}
31 static void exitfunc15(void) { printf("Executing exitfunc15.\n"); exit(0);}
32 static void exitfunc16(void) { printf("Executing exitfunc16.\n"); exit(0);}
33 static void exitfunc17(void) { printf("Executing exitfunc17.\n"); exit(0);}
34 static void exitfunc18(void) { printf("Executing exitfunc18.\n"); exit(0);}
35 static void exitfunc19(void) { printf("Executing exitfunc19.\n"); exit(0);}
36 static void exitfunc20(void) { printf("Executing exitfunc20.\n"); exit(0);}
37 static void exitfunc21(void) { printf("Executing exitfunc21.\n"); exit(0);}
38 static void exitfunc22(void) { printf("Executing exitfunc22.\n"); exit(0);}
39 static void exitfunc23(void) { printf("Executing exitfunc23.\n"); exit(0);}
40 static void exitfunc24(void) { printf("Executing exitfunc24.\n"); exit(0);}
42 static vfuncp func_table[] =
44 exitfunc0, exitfunc1, exitfunc2, exitfunc3, exitfunc4,
45 exitfunc5, exitfunc6, exitfunc7, exitfunc8, exitfunc9,
46 exitfunc10, exitfunc11, exitfunc12, exitfunc13, exitfunc14,
47 exitfunc15, exitfunc16, exitfunc17, exitfunc18, exitfunc19,
48 exitfunc20, exitfunc21, exitfunc22, exitfunc23, exitfunc24
51 /* glibc dynamically adds exit functions, so it will keep adding until
52 * it runs out of memory! So this will limit the number of exit functions
53 * we add in the loop below. uClibc has a set limit (currently 20), so the
54 * loop will go until it can't add any more (so it should not hit this limit).
56 #define ATEXIT_LIMIT 20
63 int numfuncs = sizeof(func_table)/sizeof(vfuncp);
65 /* loop until no more can be added */
66 while(count < ATEXIT_LIMIT && atexit(func_table[i]) >= 0) {
67 printf("Registered exitfunc%d with atexit()\n", i);
71 printf("%d functions registered with atexit.\n", count);