2 * Copyright (C) 2013-2018 Red Hat Inc.
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48 main (int argc
, char *argv
[])
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.
60 "data=@0x1b8 0xf8 0x21 0xdc 0xeb 0*4 "
61 "2 0 0x83 0x20*2 0 1 0 0 0 0xff 0x7 "
67 g
= guestfs_create ();
69 perror ("guestfs_create");
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
,
81 if (guestfs_launch (g
) == -1)
84 /* Read the actual data in the first sector, to check that it
85 * matches what we described in the data= parameter above.
87 data
= guestfs_pread_device (g
, "/dev/sda", 512, 0, &size
);
91 fprintf (stderr
, "%s: unexpected short read\n", program_name
);
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
);
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",
110 /* Since the disk image has a partition, we should be able to format it. */
111 if (guestfs_mkfs (g
, "vfat", "/dev/sda1") == -1)
114 /* Mount it and write a file. */
115 if (guestfs_mount (g
, "/dev/sda1", "/") == -1)
118 if (guestfs_write (g
, "/foo", "hello", 5) == -1)
121 if (guestfs_shutdown (g
) == -1)