1  /* Test for ppoll timeout
       2     Copyright (C) 2021-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <time.h>
      20  #include <poll.h>
      21  #include <errno.h>
      22  #include <intprops.h>
      23  #include <support/check.h>
      24  #include <support/xtime.h>
      25  #include <support/timespec.h>
      26  #include <support/support.h>
      27  #include <stdbool.h>
      28  
      29  static int test_ppoll_timeout (bool zero_tmo)
      30  {
      31    /* We wait for half a second.  */
      32    struct timespec ts;
      33    xclock_gettime (CLOCK_REALTIME, &ts);
      34    struct timespec timeout = make_timespec (0, zero_tmo ? 0 : TIMESPEC_HZ/2);
      35    ts = timespec_add (ts, timeout);
      36  
      37    /* Ignore fds - just wait for timeout.  */
      38    struct pollfd fds = { -1, 0, 0 };
      39    TEST_COMPARE (ppoll (&fds, 1, &timeout, 0), 0);
      40  
      41    TEST_TIMESPEC_NOW_OR_AFTER (CLOCK_REALTIME, ts);
      42  
      43    return 0;
      44  }
      45  
      46  static void
      47  test_ppoll_large_timeout (void)
      48  {
      49    support_create_timer (0, 100000000, false, NULL);
      50    struct timespec ts = { TYPE_MAXIMUM (time_t), 0 };
      51    struct pollfd fds = { -1, 0, 0 };
      52    TEST_COMPARE (ppoll (&fds, 1, &ts, 0), -1);
      53    TEST_VERIFY (errno == EINTR || errno == EOVERFLOW);
      54  }
      55  
      56  static int
      57  do_test (void)
      58  {
      59    /* Check if ppoll exits immediately.  */
      60    test_ppoll_timeout (true);
      61  
      62    /* Check if ppoll exits after specified timeout.  */
      63    test_ppoll_timeout (false);
      64  
      65    /* Check if ppoll with large timeout.  */
      66    test_ppoll_large_timeout ();
      67  
      68    return 0;
      69  }
      70  
      71  #include <support/test-driver.c>