tests/test-data.c

   1 /* nbdkit
   2  * Copyright Red Hat
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met:
   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 <stdint.h>
  38 #include <inttypes.h>
  39 #include <string.h>
  40 #include <unistd.h>
  41
  42 #include <guestfs.h>
  43
  44 #include "iszero.h"
  45 #include "test.h"
  46
  47 int
  48 main (int argc, char *argv[])
  49 {
  50   guestfs_h *g;
  51   int r;
  52   char *data;
  53   size_t size;
  54
  55   if (test_start_nbdkit ("data",
  56                          /* This example from the nbdkit-data-plugin(1)
  57                           * man page creates a 1 MB disk with one
  58                           * empty MBR-formatted partition.
  59                           */
  60                          "@0x1b8 0xf8 0x21 0xdc 0xeb 0*4 "
  61                          "2 0 0x83 0x20*2 0 1 0  0 0 0xff 0x7 "
  62                          "@0x1fe 0x55 0xaa",
  63                          "size=1M",
  64                          NULL) == -1)
  65     exit (EXIT_FAILURE);
  66
  67   g = guestfs_create ();
  68   if (g == NULL) {
  69     perror ("guestfs_create");
  70     exit (EXIT_FAILURE);
  71   }
  72
  73   r = guestfs_add_drive_opts (g, "",
  74                               GUESTFS_ADD_DRIVE_OPTS_FORMAT, "raw",
  75                               GUESTFS_ADD_DRIVE_OPTS_PROTOCOL, "nbd",
  76                               GUESTFS_ADD_DRIVE_OPTS_SERVER, server,
  77                               -1);
  78   if (r == -1)
  79     exit (EXIT_FAILURE);
  80
  81   if (guestfs_launch (g) == -1)
  82     exit (EXIT_FAILURE);
  83
  84   /* Read the actual data in the first sector, to check that it
  85    * matches what we described in the data= parameter above.
  86    */
  87   data = guestfs_pread_device (g, "/dev/sda", 512, 0, &size);
  88   if (data == NULL)
  89     exit (EXIT_FAILURE);
  90   if (size != 512) {
  91     fprintf (stderr, "%s: unexpected short read\n", program_name);
  92     exit (EXIT_FAILURE);
  93   }
  94   if (memcmp (&data[0x1b8],
  95               "\xf8\x21\xdc\xeb\0\0\0\0"
  96               "\2\0\x83\x20\x20\0\1\0\0\0\xff\x7", 20) != 0 ||
  97       memcmp (&data[0x1fe], "\x55\xaa", 2) != 0) {
  98     fprintf (stderr, "%s: unexpected data in boot sector\n", program_name);
  99     exit (EXIT_FAILURE);
 100   }
 101   memset (&data[0x1b8], 0, 20);
 102   memset (&data[0x1fe], 0, 2);
 103   if (!is_zero (data, 512)) {
 104     fprintf (stderr, "%s: unexpected data in zero parts of boot sector\n",
 105              program_name);
 106     exit (EXIT_FAILURE);
 107   }
 108   free (data);
 109
 110   /* Since the disk image has a partition, we should be able to format it. */
 111   if (guestfs_mkfs (g, "vfat", "/dev/sda1") == -1)
 112     exit (EXIT_FAILURE);
 113
 114   /* Mount it and write a file. */
 115   if (guestfs_mount (g, "/dev/sda1", "/") == -1)
 116     exit (EXIT_FAILURE);
 117
 118   if (guestfs_write (g, "/foo", "hello", 5) == -1)
 119     exit (EXIT_FAILURE);
 120
 121   if (guestfs_shutdown (g) == -1)
 122     exit (EXIT_FAILURE);
 123
 124   guestfs_close (g);
 125   exit (EXIT_SUCCESS);
 126 }