teston_exit.c 5.5 KB

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  1. /*
  2. * This test program will register the maximum number of exit functions
  3. * with on_exit(). 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)
  7. */
  8. #include <stdio.h>
  9. #include <stdlib.h>
  10. typedef void (*efuncp) (int, void *);
  11. /* All functions call exit(), in order to test that exit functions can call
  12. * exit() without screwing everything up. The value passed in through arg gets
  13. * used as the next exit status.
  14. */
  15. static void exitfunc0(int status, void *arg) { printf("Executing exitfunc0 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
  16. static void exitfunc1(int status, void *arg) { printf("Executing exitfunc1 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
  17. static void exitfunc2(int status, void *arg) { printf("Executing exitfunc2 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
  18. static void exitfunc3(int status, void *arg) { printf("Executing exitfunc3 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
  19. static void exitfunc4(int status, void *arg) { printf("Executing exitfunc4 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
  20. static void exitfunc5(int status, void *arg) { printf("Executing exitfunc5 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
  21. static void exitfunc6(int status, void *arg) { printf("Executing exitfunc6 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
  22. static void exitfunc7(int status, void *arg) { printf("Executing exitfunc7 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
  23. static void exitfunc8(int status, void *arg) { printf("Executing exitfunc8 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
  24. static void exitfunc9(int status, void *arg) { printf("Executing exitfunc9 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
  25. static void exitfunc10(int status, void *arg) { printf("Executing exitfunc10 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
  26. static void exitfunc11(int status, void *arg) { printf("Executing exitfunc11 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
  27. static void exitfunc12(int status, void *arg) { printf("Executing exitfunc12 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
  28. static void exitfunc13(int status, void *arg) { printf("Executing exitfunc13 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
  29. static void exitfunc14(int status, void *arg) { printf("Executing exitfunc14 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
  30. static void exitfunc15(int status, void *arg) { printf("Executing exitfunc15 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
  31. static void exitfunc16(int status, void *arg) { printf("Executing exitfunc16 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
  32. static void exitfunc17(int status, void *arg) { printf("Executing exitfunc17 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
  33. static void exitfunc18(int status, void *arg) { printf("Executing exitfunc18 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
  34. static void exitfunc19(int status, void *arg) { printf("Executing exitfunc19 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
  35. static void exitfunc20(int status, void *arg) { printf("Executing exitfunc20 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
  36. static void exitfunc21(int status, void *arg) { printf("Executing exitfunc21 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
  37. static void exitfunc22(int status, void *arg) { printf("Executing exitfunc22 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
  38. static void exitfunc23(int status, void *arg) { printf("Executing exitfunc23 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
  39. static void exitfunc24(int status, void *arg) { printf("Executing exitfunc24 (status=%d, arg=%lu)\n", status, (unsigned long)arg); exit((unsigned long)arg);}
  40. static efuncp func_table[] =
  41. {
  42. exitfunc0, exitfunc1, exitfunc2, exitfunc3, exitfunc4,
  43. exitfunc5, exitfunc6, exitfunc7, exitfunc8, exitfunc9,
  44. exitfunc10, exitfunc11, exitfunc12, exitfunc13, exitfunc14,
  45. exitfunc15, exitfunc16, exitfunc17, exitfunc18, exitfunc19,
  46. exitfunc20, exitfunc21, exitfunc22, exitfunc23, exitfunc24
  47. };
  48. /* glibc dynamically adds exit functions, so it will keep adding until
  49. * it runs out of memory! So this will limit the number of exit functions
  50. * we add in the loop below. uClibc has a set limit (currently 20), so the
  51. * loop will go until it can't add any more (so it should not hit this limit).
  52. */
  53. #define ON_EXIT_LIMIT 20
  54. int
  55. main ( void )
  56. {
  57. int i = 0;
  58. unsigned long count = 0;
  59. int numfuncs = sizeof(func_table)/sizeof(efuncp);
  60. /* loop until no more can be added */
  61. while(count < ON_EXIT_LIMIT && on_exit(func_table[i], (void *)count) >= 0) {
  62. count++;
  63. printf("Registered exitfunc%d with on_exit()\n", i);
  64. i = (i+1) % numfuncs;
  65. }
  66. printf("%lu functions registered with on_exit.\n", count);
  67. exit(count);
  68. }