sysdeps/unix/sysv/linux/tst-sigtimedwait.c

   1 /* Test for sigtimedwait timeout.
   2    Copyright (C) 2021-2024 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 <intprops.h>
  21 #include <errno.h>
  22 #include <signal.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
  30 test_sigtimedwait_timeout (bool zero_tmo)
  31 {
  32   /* We wait for half a second.  */
  33   struct timespec ts;
  34   xclock_gettime (CLOCK_REALTIME, &ts);
  35   struct timespec timeout = make_timespec (0, zero_tmo ? 0 : TIMESPEC_HZ/2);
  36   ts = timespec_add (ts, timeout);
  37
  38   /* Set sigset to just wait for timeout.  */
  39   sigset_t ss_usr1;
  40   sigemptyset (&ss_usr1);
  41   sigaddset (&ss_usr1, SIGUSR1);
  42
  43   int ret = sigtimedwait (&ss_usr1, NULL, &timeout);
  44   if (ret != -1)
  45     FAIL_EXIT1 ("sigtimedwait failed: %m\n");
  46
  47   TEST_TIMESPEC_NOW_OR_AFTER (CLOCK_REALTIME, ts);
  48
  49   return 0;
  50 }
  51
  52 static void
  53 test_sigtimedwait_large_timeout (void)
  54 {
  55   support_create_timer (0, 100000000, false, NULL);
  56   struct timespec ts = { TYPE_MAXIMUM (time_t), 0 };
  57
  58   sigset_t ss_usr1;
  59   sigemptyset (&ss_usr1);
  60   sigaddset (&ss_usr1, SIGUSR1);
  61
  62   TEST_COMPARE (sigtimedwait (&ss_usr1, NULL, &ts), -1);
  63   TEST_VERIFY (errno == EINTR || errno == EOVERFLOW);
  64 }
  65
  66 static int
  67 do_test (void)
  68 {
  69   /* Check if sigtimedwait exits immediately.  */
  70   test_sigtimedwait_timeout (true);
  71
  72   /* Check if sigtimedwait exits after specified timeout.  */
  73   test_sigtimedwait_timeout (false);
  74
  75   test_sigtimedwait_large_timeout ();
  76
  77   return 0;
  78 }
  79
  80 #include <support/test-driver.c>