2 * Copyright (C) 2018 Red Hat Inc.
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5 * modification, are permitted provided that the following conditions are
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
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.
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16 * used to endorse or promote products derived from this software without
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19 * THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND
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21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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43 #include <sys/types.h>
50 #define FILENAME "offset-data"
51 #define FILESIZE (10 * 1024 * 1024)
60 for (i
= 0; i
< sizeof pattern
; i
+= 2) {
65 fp
= fopen (FILENAME
, "w");
71 for (i
= 0; i
< FILESIZE
; i
+= sizeof pattern
) {
72 if (fwrite (pattern
, sizeof pattern
, 1, fp
) != 1) {
73 perror (FILENAME
": write");
78 if (fclose (fp
) == EOF
) {
84 static uint8_t buf
[1024*1024];
91 for (i
= 0; i
< sizeof buf
; i
+= 2) {
92 if (buf
[i
] != 0x55 || buf
[i
+1] != 0xAA) {
93 fprintf (stderr
, "%s FAILED: file overwritten outside offset/range\n",
101 main (int argc
, char *argv
[])
107 /* FILENAME is a 10 MB file containing test pattern data 0x55AA
108 * repeated. We use the middle 8 MB to create a partition table and
109 * filesystem, and check afterwards that the test pattern in the
110 * first and final megabyte has not been overwritten.
114 if (test_start_nbdkit ("--filter", "offset",
116 "offset=1M", "range=8M",
120 g
= guestfs_create ();
122 perror ("guestfs_create");
126 r
= guestfs_add_drive_opts (g
, "",
127 GUESTFS_ADD_DRIVE_OPTS_FORMAT
, "raw",
128 GUESTFS_ADD_DRIVE_OPTS_PROTOCOL
, "nbd",
129 GUESTFS_ADD_DRIVE_OPTS_SERVER
, server
,
134 if (guestfs_launch (g
) == -1)
137 if (guestfs_part_disk (g
, "/dev/sda", "mbr") == -1)
139 if (guestfs_mkfs (g
, "ext2", "/dev/sda1") == -1)
142 if (guestfs_mount (g
, "/dev/sda1", "/") == -1)
145 #define filename "/hello.txt"
146 #define content "hello, people of the world"
148 if (guestfs_write (g
, filename
, content
, strlen (content
)) == -1)
151 data
= guestfs_cat (g
, filename
);
155 if (strcmp (data
, content
) != 0) {
157 "%s FAILED: unexpected content of %s file "
158 "(actual: %s, expected: %s)\n",
159 program_name
, filename
, data
, content
);
163 if (guestfs_fill_dir (g
, "/", 1000) == -1)
166 if (guestfs_shutdown (g
) == -1)
171 /* Check the first and final megabyte of test patterns has not been
172 * overwritten in the underlying file.
174 fd
= open (FILENAME
, O_RDONLY
|O_CLOEXEC
);
176 perror (FILENAME
": open");
179 if (pread (fd
, buf
, sizeof buf
, 0) != sizeof buf
) {
180 fprintf (stderr
, "%s: pread: short read or error (%d)\n",
185 if (pread (fd
, buf
, sizeof buf
, 9*1024*1024) != sizeof buf
) {
186 fprintf (stderr
, "%s: pread: short read or error (%d)\n",