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43 #include <sys/types.h>
50 static uint8_t buf
[1024*1024];
57 for (i
= 0; i
< sizeof buf
; i
+= 2) {
58 if (buf
[i
] != 0x55 || buf
[i
+1] != 0xAA) {
59 fprintf (stderr
, "%s FAILED: file overwritten outside offset/range\n",
67 main (int argc
, char *argv
[])
73 /* offset-data (created by tests/Makefile.am) is a 10 MB file
74 * containing test pattern data 0x55AA repeated. We use the middle
75 * 8 MB to create a partition table and filesystem, and check
76 * afterwards that the test pattern in the first and final megabyte
77 * has not been overwritten.
79 if (test_start_nbdkit ("--filter", "offset",
80 "file", "offset-data",
81 "offset=1M", "range=8M",
85 g
= guestfs_create ();
87 perror ("guestfs_create");
91 r
= guestfs_add_drive_opts (g
, "",
92 GUESTFS_ADD_DRIVE_OPTS_FORMAT
, "raw",
93 GUESTFS_ADD_DRIVE_OPTS_PROTOCOL
, "nbd",
94 GUESTFS_ADD_DRIVE_OPTS_SERVER
, server
,
99 if (guestfs_launch (g
) == -1)
102 if (guestfs_part_disk (g
, "/dev/sda", "mbr") == -1)
104 if (guestfs_mkfs (g
, "ext2", "/dev/sda1") == -1)
107 if (guestfs_mount (g
, "/dev/sda1", "/") == -1)
110 #define filename "/hello.txt"
111 #define content "hello, people of the world"
113 if (guestfs_write (g
, filename
, content
, strlen (content
)) == -1)
116 data
= guestfs_cat (g
, filename
);
120 if (strcmp (data
, content
) != 0) {
122 "%s FAILED: unexpected content of %s file "
123 "(actual: %s, expected: %s)\n",
124 program_name
, filename
, data
, content
);
128 if (guestfs_fill_dir (g
, "/", 1000) == -1)
131 if (guestfs_shutdown (g
) == -1)
136 /* Check the first and final megabyte of test patterns has not been
137 * overwritten in the underlying file.
139 fd
= open ("offset-data", O_RDONLY
|O_CLOEXEC
);
141 perror ("open: offset-data");
144 if (pread (fd
, buf
, sizeof buf
, 0) != sizeof buf
) {
145 fprintf (stderr
, "pread: short read or error (%d)\n", errno
);
149 if (pread (fd
, buf
, sizeof buf
, 9*1024*1024) != sizeof buf
) {
150 fprintf (stderr
, "pread: short read or error (%d)\n", errno
);