1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
/* SPDX-License-Identifier: LGPL-2.1+ */
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include "alloc-util.h"
#include "fd-util.h"
#include "io-util.h"
#include "macro.h"
static void test_sparse_write_one(int fd, const char *buffer, size_t n) {
char check[n];
assert_se(lseek(fd, 0, SEEK_SET) == 0);
assert_se(ftruncate(fd, 0) >= 0);
assert_se(sparse_write(fd, buffer, n, 4) == (ssize_t) n);
assert_se(lseek(fd, 0, SEEK_CUR) == (off_t) n);
assert_se(ftruncate(fd, n) >= 0);
assert_se(lseek(fd, 0, SEEK_SET) == 0);
assert_se(read(fd, check, n) == (ssize_t) n);
assert_se(memcmp(buffer, check, n) == 0);
}
static void test_sparse_write(void) {
const char test_a[] = "test";
const char test_b[] = "\0\0\0\0test\0\0\0\0";
const char test_c[] = "\0\0test\0\0\0\0";
const char test_d[] = "\0\0test\0\0\0test\0\0\0\0test\0\0\0\0\0test\0\0\0test\0\0\0\0test\0\0\0\0\0\0\0\0";
const char test_e[] = "test\0\0\0\0test";
_cleanup_close_ int fd = -1;
char fn[] = "/tmp/sparseXXXXXX";
fd = mkostemp(fn, O_CLOEXEC);
assert_se(fd >= 0);
unlink(fn);
test_sparse_write_one(fd, test_a, sizeof(test_a));
test_sparse_write_one(fd, test_b, sizeof(test_b));
test_sparse_write_one(fd, test_c, sizeof(test_c));
test_sparse_write_one(fd, test_d, sizeof(test_d));
test_sparse_write_one(fd, test_e, sizeof(test_e));
}
int main(void) {
test_sparse_write();
return 0;
}
|
