tests/test-ocaml-errorcodes.c

   1 /* nbdkit
   2  * Copyright (C) 2013-2021 Red Hat Inc.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
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   7  *
   8  * * Redistributions of source code must retain the above copyright
   9  * notice, this list of conditions and the following disclaimer.
  10  *
  11  * * Redistributions in binary form must reproduce the above copyright
  12  * notice, this list of conditions and the following disclaimer in the
  13  * documentation and/or other materials provided with the distribution.
  14  *
  15  * * Neither the name of Red Hat nor the names of its contributors may be
  16  * used to endorse or promote products derived from this software without
  17  * specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  21  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  22  * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RED HAT OR
  23  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  24  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  25  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  26  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  27  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  28  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  29  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 #include <config.h>
  34
  35 #include <stdio.h>
  36 #include <stdlib.h>
  37 #include <errno.h>
  38 #include <assert.h>
  39
  40 #include <libnbd.h>
  41
  42 /* This test checks the conversion from OCaml Unix.error to errno (in
  43  * the plugin) to NBD_E* (over the wire) and back to errno (in
  44  * libnbd).
  45  *
  46  * Reading at various sector offsets in the associated plugin
  47  * (test_ocaml_errorcodes_plugin.ml) produces predictable error codes.
  48  */
  49 static struct { uint64_t offset; int expected_errno; } tests[] = {
  50   { 1*512, EPERM },
  51   { 2*512, EIO },
  52   { 3*512, ENOMEM },
  53   { 4*512, ESHUTDOWN },
  54   { 5*512, EINVAL },
  55   { 0 }
  56 };
  57
  58 int
  59 main (int argc, char *argv[])
  60 {
  61   struct nbd_handle *nbd;
  62   char buf[512];
  63   size_t i;
  64   int actual_errno;
  65
  66 #ifdef __APPLE__
  67   printf ("%s: loading the OCaml plugin fails on macOS, skipping\n",
  68           argv[0]);
  69   exit (77);
  70 #endif
  71
  72   nbd = nbd_create ();
  73   if (nbd == NULL) {
  74     fprintf (stderr, "%s\n", nbd_get_error ());
  75     exit (EXIT_FAILURE);
  76   }
  77
  78   if (nbd_connect_command (nbd,
  79                            (char *[]) {
  80                              "nbdkit", "-s", "--exit-with-parent",
  81                              "./test-ocaml-errorcodes-plugin.so",
  82                              NULL }) == -1) {
  83     fprintf (stderr, "%s\n", nbd_get_error ());
  84     exit (EXIT_FAILURE);
  85   }
  86
  87   assert (nbd_pread (nbd, buf, 512, 0, 0) == 0);
  88
  89   for (i = 0; tests[i].offset != 0; ++i) {
  90     assert (nbd_pread (nbd, buf, 512, tests[i].offset, 0) == -1);
  91     actual_errno = nbd_get_errno ();
  92     if (actual_errno != tests[i].expected_errno) {
  93       fprintf (stderr, "%s: FAIL: actual errno = %d expected errno = %d\n",
  94                argv[0], actual_errno, tests[i].expected_errno);
  95       exit (EXIT_FAILURE);
  96     }
  97   }
  98
  99   nbd_close (nbd);
 100   exit (EXIT_SUCCESS);
 101 }