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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
ac933e8e RC |
2 | |
3 | #include <fcntl.h> | |
4 | #include <stdlib.h> | |
5 | #include <unistd.h> | |
6 | ||
7 | #include "alloc-util.h" | |
8 | #include "fd-util.h" | |
9 | #include "io-util.h" | |
10 | #include "macro.h" | |
11 | ||
12 | static void test_sparse_write_one(int fd, const char *buffer, size_t n) { | |
13 | char check[n]; | |
14 | ||
15 | assert_se(lseek(fd, 0, SEEK_SET) == 0); | |
16 | assert_se(ftruncate(fd, 0) >= 0); | |
17 | assert_se(sparse_write(fd, buffer, n, 4) == (ssize_t) n); | |
18 | ||
19 | assert_se(lseek(fd, 0, SEEK_CUR) == (off_t) n); | |
20 | assert_se(ftruncate(fd, n) >= 0); | |
21 | ||
22 | assert_se(lseek(fd, 0, SEEK_SET) == 0); | |
23 | assert_se(read(fd, check, n) == (ssize_t) n); | |
24 | ||
25 | assert_se(memcmp(buffer, check, n) == 0); | |
26 | } | |
27 | ||
28 | static void test_sparse_write(void) { | |
29 | const char test_a[] = "test"; | |
30 | const char test_b[] = "\0\0\0\0test\0\0\0\0"; | |
31 | const char test_c[] = "\0\0test\0\0\0\0"; | |
32 | 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"; | |
33 | const char test_e[] = "test\0\0\0\0test"; | |
34 | _cleanup_close_ int fd = -1; | |
35 | char fn[] = "/tmp/sparseXXXXXX"; | |
36 | ||
37 | fd = mkostemp(fn, O_CLOEXEC); | |
38 | assert_se(fd >= 0); | |
39 | unlink(fn); | |
40 | ||
41 | test_sparse_write_one(fd, test_a, sizeof(test_a)); | |
42 | test_sparse_write_one(fd, test_b, sizeof(test_b)); | |
43 | test_sparse_write_one(fd, test_c, sizeof(test_c)); | |
44 | test_sparse_write_one(fd, test_d, sizeof(test_d)); | |
45 | test_sparse_write_one(fd, test_e, sizeof(test_e)); | |
46 | } | |
47 | ||
48 | int main(void) { | |
49 | test_sparse_write(); | |
50 | ||
51 | return 0; | |
52 | } |