rt/tst-aio6.c

   1 /* Test for timeout handling.
   2    Copyright (C) 2000-2020 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 <aio.h>
  20 #include <errno.h>
  21 #include <stdio.h>
  22 #include <unistd.h>
  23 #include <sys/time.h>
  24
  25
  26 #define TEST_FUNCTION do_test ()
  27 static int
  28 do_test (void)
  29 {
  30   struct aiocb *arr[1];
  31   struct aiocb cb;
  32   char buf[100];
  33   struct timeval before;
  34   struct timeval after;
  35   struct timespec timeout;
  36   int fd[2];
  37   int result = 0;
  38
  39   if (pipe (fd) != 0)
  40     {
  41       printf ("cannot create pipe: %m\n");
  42       return 1;
  43     }
  44
  45   arr[0] = &cb;
  46
  47   cb.aio_fildes = fd[0];
  48   cb.aio_lio_opcode = LIO_WRITE;
  49   cb.aio_reqprio = 0;
  50   cb.aio_buf = (void *) buf;
  51   cb.aio_nbytes = sizeof (buf) - 1;
  52   cb.aio_offset = 0;
  53   cb.aio_sigevent.sigev_notify = SIGEV_NONE;
  54
  55   /* Try to read from stdin where nothing will be available.  */
  56   if (aio_read (arr[0]) < 0)
  57     {
  58       if (errno == ENOSYS)
  59         {
  60           puts ("no aio support in this configuration");
  61           return 0;
  62         }
  63       printf ("aio_read failed: %m\n");
  64       return 1;
  65     }
  66
  67   /* Get the current time.  */
  68   gettimeofday (&before, NULL);
  69
  70   /* Wait for input which is unsuccessful and therefore the function will
  71      time out.  */
  72   timeout.tv_sec = 3;
  73   timeout.tv_nsec = 0;
  74   if (aio_suspend ((const struct aiocb *const*) arr, 1, &timeout) != -1)
  75     {
  76       puts ("aio_suspend() didn't return -1");
  77       result = 1;
  78     }
  79   else if (errno != EAGAIN)
  80     {
  81       puts ("error not set to EAGAIN");
  82       result = 1;
  83     }
  84   else
  85     {
  86       gettimeofday (&after, NULL);
  87       if (after.tv_sec < before.tv_sec + 1)
  88         {
  89           puts ("timeout came too early");
  90           result = 1;
  91         }
  92     }
  93
  94   return result;
  95 }
  96
  97 #include "../test-skeleton.c"