rt/tst-aio7.c

   1 /* Test for AIO POSIX compliance.
   2    Copyright (C) 2001,02 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 <error.h>
  22 #include <errno.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <unistd.h>
  26
  27
  28 /* We might wait for 3 seconds, so increase timeout to 10 seconds.  */
  29 #define TIMEOUT 10
  30
  31
  32 #define TEST_FUNCTION do_test ()
  33 static int
  34 do_test (void)
  35 {
  36   int result = 0;
  37
  38   /* Test for aio_cancel() detecting invalid file descriptor.  */
  39   {
  40     struct aiocb cb;
  41     int fd = -1;
  42
  43     cb.aio_fildes = fd;
  44     cb.aio_offset = 0;
  45     cb.aio_buf = NULL;
  46     cb.aio_nbytes = 0;
  47     cb.aio_reqprio = 0;
  48     cb.aio_sigevent.sigev_notify = SIGEV_NONE;
  49
  50     errno = 0;
  51
  52     /* Case one: invalid fds that match.  */
  53     if (aio_cancel (fd, &cb) != -1 || errno != EBADF)
  54       {
  55         if (errno == ENOSYS)
  56           {
  57             puts ("no aio support in this configuration");
  58             return 0;
  59           }
  60
  61         puts ("aio_cancel( -1, {-1..} ) did not return -1 or errno != EBADF");
  62         ++result;
  63       }
  64
  65     cb.aio_fildes = -2;
  66     errno = 0;
  67
  68     /* Case two: invalid fds that do not match; just print warning.  */
  69     if (aio_cancel (fd, &cb) != -1 || errno != EBADF)
  70       puts ("aio_cancel( -1, {-2..} ) did not return -1 or errno != EBADF");
  71   }
  72
  73   /* Test for aio_fsync() detecting bad fd, and fd not open for writing.  */
  74   {
  75     struct aiocb cb;
  76     int fd = -1;
  77
  78     cb.aio_fildes = fd;
  79     cb.aio_offset = 0;
  80     cb.aio_buf = NULL;
  81     cb.aio_nbytes = 0;
  82     cb.aio_reqprio = 0;
  83     cb.aio_sigevent.sigev_notify = SIGEV_NONE;
  84
  85     errno = 0;
  86
  87     /* Case one: invalid fd.  */
  88     if (aio_fsync (O_SYNC, &cb) != -1 || errno != EBADF)
  89       {
  90         puts ("aio_fsync( op, {-1..} ) did not return -1 or errno != EBADF");
  91         ++result;
  92       }
  93
  94     if ((fd = open ("/dev/null", O_RDONLY)) < 0)
  95       error (1, errno, "opening /dev/null");
  96
  97     cb.aio_fildes = fd;
  98     errno = 0;
  99
 100     /* Case two: valid fd but open for read only.  */
 101     if (aio_fsync (O_SYNC, &cb) != -1 || errno != EBADF)
 102       {
 103         puts ("aio_fsync( op, {RO..} ) did not return -1 or errno != EBADF");
 104         ++result;
 105       }
 106
 107     close (fd);
 108   }
 109
 110   /* Test for aio_suspend() suspending even if completed elements in list.  */
 111   {
 112     const int BYTES = 8, ELEMS = 2;
 113     int i, r, fd;
 114     char buff[BYTES];
 115     char name[] = "/tmp/aio7.XXXXXX";
 116     struct timespec timeout;
 117     struct aiocb cb0, cb1;
 118     struct aiocb *list[ELEMS];
 119
 120     fd = mkstemp (name);
 121     if (fd < 0)
 122       error (1, errno, "creating temp file");
 123
 124     if (unlink (name))
 125       error (1, errno, "unlinking temp file");
 126
 127     if (write (fd, "01234567", BYTES) != BYTES)
 128       error (1, errno, "writing to temp file");
 129
 130     cb0.aio_fildes = fd;
 131     cb0.aio_offset = 0;
 132     cb0.aio_buf = buff;
 133     cb0.aio_nbytes = BYTES;
 134     cb0.aio_reqprio = 0;
 135     cb0.aio_sigevent.sigev_notify = SIGEV_NONE;
 136
 137     r = aio_read (&cb0);
 138     if (r != 0)
 139       error (1, errno, "reading from file");
 140
 141     while (aio_error (&(cb0)) == EINPROGRESS)
 142       usleep (10);
 143
 144     for (i = 0; i < BYTES; i++)
 145       printf ("%c ", buff[i]);
 146     printf ("\n");
 147
 148     /* At this point, the first read is completed, so start another one on
 149      * stdin, which will not complete unless the user inputs something.
 150      */
 151     cb1.aio_fildes = 0;
 152     cb1.aio_offset = 0;
 153     cb1.aio_buf = buff;
 154     cb1.aio_nbytes = BYTES;
 155     cb1.aio_reqprio = 0;
 156     cb1.aio_sigevent.sigev_notify = SIGEV_NONE;
 157
 158     r = aio_read (&cb1);
 159     if (r != 0)
 160       error (1, errno, "reading from file");
 161
 162     /* Now call aio_suspend() with the two reads.  It should return
 163      * immediately according to the POSIX spec.
 164      */
 165     list[0] = &cb0;
 166     list[1] = &cb1;
 167     timeout.tv_sec = 3;
 168     timeout.tv_nsec = 0;
 169     r = aio_suspend ((const struct aiocb * const *) list, ELEMS, &timeout);
 170
 171     if (r == -1 && errno == EAGAIN)
 172       {
 173         puts ("aio_suspend([done,blocked],2,3) suspended thread");
 174         ++result;
 175       }
 176   }
 177
 178   return result;
 179 }
 180
 181 #include "../test-skeleton.c"