1 | /* Common f{truncate} tests definitions. |
2 | Copyright (C) 2016-2022 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <unistd.h> |
20 | #include <sys/types.h> |
21 | #include <sys/stat.h> |
22 | #include <unistd.h> |
23 | |
24 | static void do_prepare (void); |
25 | #define PREPARE(argc, argv) do_prepare () |
26 | static int do_test (void); |
27 | #define TEST_FUNCTION do_test () |
28 | |
29 | #include <test-skeleton.c> |
30 | |
31 | static char *temp_filename; |
32 | static int temp_fd; |
33 | |
34 | static void |
35 | do_prepare (void) |
36 | { |
37 | temp_fd = create_temp_file (base: "tst-trucate." , filename: &temp_filename); |
38 | if (temp_fd == -1) |
39 | { |
40 | printf (format: "cannot create temporary file: %m\n" ); |
41 | exit (1); |
42 | } |
43 | } |
44 | |
45 | #define FAIL(str) \ |
46 | do { printf ("error: %s (line %d)\n", str, __LINE__); return 1; } while (0) |
47 | |
48 | static int |
49 | do_test_with_offset (off_t offset) |
50 | { |
51 | struct stat st; |
52 | char buf[1000]; |
53 | |
54 | memset (buf, 0xcf, sizeof (buf)); |
55 | |
56 | if (pwrite (fd: temp_fd, buf: buf, n: sizeof (buf), offset: offset) != sizeof (buf)) |
57 | FAIL ("write failed" ); |
58 | if (fstat (fd: temp_fd, buf: &st) < 0 || st.st_size != (offset + sizeof (buf))) |
59 | FAIL ("initial size wrong" ); |
60 | |
61 | if (ftruncate (fd: temp_fd, length: offset + 800) < 0) |
62 | FAIL ("size reduction with ftruncate failed" ); |
63 | if (fstat (fd: temp_fd, buf: &st) < 0 || st.st_size != (offset + 800)) |
64 | FAIL ("size after reduction with ftruncate is incorrect" ); |
65 | |
66 | /* The following test covers more than POSIX. POSIX does not require |
67 | that ftruncate() can increase the file size. But we are testing |
68 | Unix systems. */ |
69 | if (ftruncate (fd: temp_fd, length: offset + 1200) < 0) |
70 | FAIL ("size increate with ftruncate failed" ); |
71 | if (fstat (fd: temp_fd, buf: &st) < 0 || st.st_size != (offset + 1200)) |
72 | FAIL ("size after increase is incorrect" ); |
73 | |
74 | if (truncate (file: temp_filename, length: offset + 800) < 0) |
75 | FAIL ("size reduction with truncate failed" ); |
76 | if (fstat (fd: temp_fd, buf: &st) < 0 || st.st_size != (offset + 800)) |
77 | FAIL ("size after reduction with truncate incorrect" ); |
78 | |
79 | /* The following test covers more than POSIX. POSIX does not require |
80 | that truncate() can increase the file size. But we are testing |
81 | Unix systems. */ |
82 | if (truncate (file: temp_filename, length: (offset + 1200)) < 0) |
83 | FAIL ("size increase with truncate failed" ); |
84 | if (fstat (fd: temp_fd, buf: &st) < 0 || st.st_size != (offset + 1200)) |
85 | FAIL ("size increase with truncate is incorrect" ); |
86 | |
87 | return 0; |
88 | } |
89 | |