rt/tst-clock2.c

   1 /* Test setting the monotonic clock.  */
   2
   3 #include <time.h>
   4 #include <unistd.h>
   5
   6 #if defined CLOCK_MONOTONIC && defined _POSIX_MONOTONIC_CLOCK
   7
   8 # include <errno.h>
   9 # include <stdio.h>
  10
  11 static int
  12 do_test (void)
  13 {
  14   if (sysconf (_SC_MONOTONIC_CLOCK) <= 0)
  15     return 0;
  16
  17   struct timespec ts;
  18   if (clock_gettime (CLOCK_MONOTONIC, &ts) != 0)
  19     {
  20       puts ("clock_gettime(CLOCK_MONOTONIC) failed");
  21       return 1;
  22     }
  23
  24   /* Setting the monotonic clock must fail.  */
  25   if (clock_settime (CLOCK_MONOTONIC, &ts) != -1)
  26     {
  27       puts ("clock_settime(CLOCK_MONOTONIC) did not fail");
  28       return 1;
  29     }
  30   if (errno != EINVAL)
  31     {
  32       printf ("clock_settime(CLOCK_MONOTONIC) set errno to %d, expected %d\n",
  33               errno, EINVAL);
  34       return 1;
  35     }
  36   return 0;
  37 }
  38 # define TEST_FUNCTION do_test ()
  39
  40 #else
  41 # define TEST_FUNCTION  0
  42 #endif
  43 #include "../test-skeleton.c"