rt/tst-aio4.c

   1 /* Test for completion signal handling.
   2    Copyright (C) 2000,01,02 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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <aio.h>
  21 #include <signal.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <unistd.h>
  25 #include <errno.h>
  26
  27 /* We might need a bit longer timeout.  */
  28 #define TIMEOUT 10 /* sec */
  29
  30 int my_signo;
  31
  32 volatile sig_atomic_t flag;
  33
  34
  35 static void
  36 sighandler (const int signo)
  37 {
  38   flag = signo;
  39 }
  40
  41 static int
  42 wait_flag (void)
  43 {
  44   while (flag == 0)
  45     {
  46       puts ("Sleeping...");
  47       sleep (1);
  48     }
  49
  50   if (flag != my_signo)
  51     {
  52       printf ("signal handler received wrong signal, flag is %d\n", flag);
  53       return 1;
  54     }
  55
  56   return 0;
  57 }
  58
  59 #ifndef SIGRTMIN
  60 # define SIGRTMIN -1
  61 # define SIGRTMAX -1
  62 #endif
  63
  64 static int
  65 do_test (int argc, char *argv[])
  66 {
  67   char name[] = "/tmp/aio4.XXXXXX";
  68   int fd;
  69   struct aiocb *arr[1];
  70   struct aiocb cb;
  71   static const char buf[] = "Hello World\n";
  72   struct aioinit init = {10, 20, 0};
  73   struct sigaction sa;
  74   struct sigevent ev;
  75
  76   if (SIGRTMIN == -1)
  77   {
  78       printf ("RT signals not supported.\n");
  79       return 0;
  80   }
  81
  82   /* Select a signal from the middle of the available choices... */
  83   my_signo = (SIGRTMAX + SIGRTMIN) / 2;
  84
  85   fd = mkstemp (name);
  86   if (fd == -1)
  87     {
  88       printf ("cannot open temp name: %m\n");
  89       return 1;
  90     }
  91
  92   unlink (name);
  93
  94   /* Test also aio_init.  */
  95   aio_init (&init);
  96
  97   arr[0] = &cb;
  98
  99   cb.aio_fildes = fd;
 100   cb.aio_lio_opcode = LIO_WRITE;
 101   cb.aio_reqprio = 0;
 102   cb.aio_buf = (void *) buf;
 103   cb.aio_nbytes = sizeof (buf) - 1;
 104   cb.aio_offset = 0;
 105   cb.aio_sigevent.sigev_notify = SIGEV_SIGNAL;
 106   cb.aio_sigevent.sigev_notify_function = NULL;
 107   cb.aio_sigevent.sigev_notify_attributes = NULL;
 108   cb.aio_sigevent.sigev_signo = my_signo;
 109   cb.aio_sigevent.sigev_value.sival_ptr = NULL;
 110
 111   ev.sigev_notify = SIGEV_SIGNAL;
 112   ev.sigev_notify_function = NULL;
 113   ev.sigev_notify_attributes = NULL;
 114   ev.sigev_signo = my_signo;
 115
 116   sa.sa_handler = sighandler;
 117   sigemptyset (&sa.sa_mask);
 118   sa.sa_flags = SA_RESTART;
 119
 120   if (sigaction (my_signo, &sa, NULL) < 0)
 121     {
 122       printf ("sigaction failed: %m\n");
 123       return 1;
 124     }
 125
 126   flag = 0;
 127   /* First use aio_write.  */
 128   if (aio_write (arr[0]) < 0)
 129     {
 130       if (errno == ENOSYS)
 131         {
 132           puts ("no aio support in this configuration");
 133           return 0;
 134         }
 135       printf ("aio_write failed: %m\n");
 136       return 1;
 137     }
 138
 139   if (wait_flag ())
 140     return 1;
 141
 142   puts ("aio_write OK");
 143
 144   flag = 0;
 145   /* Again with lio_listio.  */
 146   if (lio_listio (LIO_NOWAIT, arr, 1, &ev) < 0)
 147     {
 148       printf ("lio_listio failed: %m\n");
 149       return 1;
 150     }
 151
 152   if (wait_flag ())
 153     return 1;
 154
 155   puts ("all OK");
 156
 157   return 0;
 158 }
 159
 160 #include "../test-skeleton.c"