rt/tst-aio4.c

   1 /* Test for completion signal handling.
   2    Copyright (C) 2000-2019 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 <signal.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <unistd.h>
  24 #include <errno.h>
  25
  26 int my_signo;
  27
  28 volatile sig_atomic_t flag;
  29
  30
  31 static void
  32 sighandler (const int signo)
  33 {
  34   flag = signo;
  35 }
  36
  37 static int
  38 wait_flag (void)
  39 {
  40   while (flag == 0)
  41     {
  42       puts ("Sleeping...");
  43       sleep (1);
  44     }
  45
  46   if (flag != my_signo)
  47     {
  48       printf ("signal handler received wrong signal, flag is %d\n", flag);
  49       return 1;
  50     }
  51
  52   return 0;
  53 }
  54
  55 #ifndef SIGRTMIN
  56 # define SIGRTMIN -1
  57 # define SIGRTMAX -1
  58 #endif
  59
  60 static int
  61 do_test (int argc, char *argv[])
  62 {
  63   char name[] = "/tmp/aio4.XXXXXX";
  64   int fd;
  65   struct aiocb *arr[1];
  66   struct aiocb cb;
  67   static const char buf[] = "Hello World\n";
  68   struct aioinit init = {10, 20, 0};
  69   struct sigaction sa;
  70   struct sigevent ev;
  71
  72   if (SIGRTMIN == -1)
  73   {
  74       printf ("RT signals not supported.\n");
  75       return 0;
  76   }
  77
  78   /* Select a signal from the middle of the available choices... */
  79   my_signo = (SIGRTMAX + SIGRTMIN) / 2;
  80
  81   fd = mkstemp (name);
  82   if (fd == -1)
  83     {
  84       printf ("cannot open temp name: %m\n");
  85       return 1;
  86     }
  87
  88   unlink (name);
  89
  90   /* Test also aio_init.  */
  91   aio_init (&init);
  92
  93   arr[0] = &cb;
  94
  95   cb.aio_fildes = fd;
  96   cb.aio_lio_opcode = LIO_WRITE;
  97   cb.aio_reqprio = 0;
  98   cb.aio_buf = (void *) buf;
  99   cb.aio_nbytes = sizeof (buf) - 1;
 100   cb.aio_offset = 0;
 101   cb.aio_sigevent.sigev_notify = SIGEV_SIGNAL;
 102   cb.aio_sigevent.sigev_notify_function = NULL;
 103   cb.aio_sigevent.sigev_notify_attributes = NULL;
 104   cb.aio_sigevent.sigev_signo = my_signo;
 105   cb.aio_sigevent.sigev_value.sival_ptr = NULL;
 106
 107   ev.sigev_notify = SIGEV_SIGNAL;
 108   ev.sigev_notify_function = NULL;
 109   ev.sigev_notify_attributes = NULL;
 110   ev.sigev_signo = my_signo;
 111
 112   sa.sa_handler = sighandler;
 113   sigemptyset (&sa.sa_mask);
 114   sa.sa_flags = SA_RESTART;
 115
 116   if (sigaction (my_signo, &sa, NULL) < 0)
 117     {
 118       printf ("sigaction failed: %m\n");
 119       return 1;
 120     }
 121
 122   flag = 0;
 123   /* First use aio_write.  */
 124   if (aio_write (arr[0]) < 0)
 125     {
 126       if (errno == ENOSYS)
 127         {
 128           puts ("no aio support in this configuration");
 129           return 0;
 130         }
 131       printf ("aio_write failed: %m\n");
 132       return 1;
 133     }
 134
 135   if (wait_flag ())
 136     return 1;
 137
 138   puts ("aio_write OK");
 139
 140   flag = 0;
 141   /* Again with lio_listio.  */
 142   if (lio_listio (LIO_NOWAIT, arr, 1, &ev) < 0)
 143     {
 144       printf ("lio_listio failed: %m\n");
 145       return 1;
 146     }
 147
 148   if (wait_flag ())
 149     return 1;
 150
 151   puts ("all OK");
 152
 153   return 0;
 154 }
 155
 156 #include "../test-skeleton.c"