]>
Commit | Line | Data |
---|---|---|
bff334e0 | 1 | /* Test setvbuf on readonly fopen (using mmap stdio). |
6d7e8eda | 2 | Copyright (C) 2002-2023 Free Software Foundation, Inc. |
bff334e0 | 3 | This file is part of the GNU C Library. |
bff334e0 UD |
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 | |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
bff334e0 UD |
18 | |
19 | #include <stdio.h> | |
20 | #include <stdlib.h> | |
21 | #include <string.h> | |
22 | #include <unistd.h> | |
23 | ||
24 | int main (void) | |
25 | { | |
26 | char name[] = "/tmp/tst-mmap-setvbuf.XXXXXX"; | |
27 | char buf[4096]; | |
28 | const char * const test = "Let's see if mmap stdio works with setvbuf.\n"; | |
29 | char temp[strlen (test) + 1]; | |
30 | int fd = mkstemp (name); | |
31 | FILE *f; | |
32 | ||
33 | if (fd == -1) | |
34 | { | |
6d497bbe | 35 | printf ("%u: cannot open temporary file: %m\n", __LINE__); |
bff334e0 UD |
36 | exit (1); |
37 | } | |
38 | ||
39 | f = fdopen (fd, "w"); | |
40 | if (f == NULL) | |
41 | { | |
6d497bbe | 42 | printf ("%u: cannot fdopen temporary file: %m\n", __LINE__); |
bff334e0 UD |
43 | exit (1); |
44 | } | |
45 | ||
46 | fputs (test, f); | |
47 | fclose (f); | |
48 | ||
1ce8aaae | 49 | f = fopen (name, "rm"); |
bff334e0 UD |
50 | if (f == NULL) |
51 | { | |
6d497bbe | 52 | printf ("%u: cannot fopen temporary file: %m\n", __LINE__); |
bff334e0 UD |
53 | exit (1); |
54 | } | |
55 | ||
56 | if (setvbuf (f, buf, _IOFBF, sizeof buf)) | |
57 | { | |
6d497bbe | 58 | printf ("%u: setvbuf failed: %m\n", __LINE__); |
bff334e0 UD |
59 | exit (1); |
60 | } | |
61 | ||
62 | if (fread (temp, 1, strlen (test), f) != strlen (test)) | |
63 | { | |
6d497bbe | 64 | printf ("%u: couldn't read the file back: %m\n", __LINE__); |
bff334e0 UD |
65 | exit (1); |
66 | } | |
67 | temp [strlen (test)] = '\0'; | |
68 | ||
69 | if (strcmp (test, temp)) | |
70 | { | |
6d497bbe | 71 | printf ("%u: read different string than was written:\n%s%s", |
bff334e0 UD |
72 | __LINE__, test, temp); |
73 | exit (1); | |
74 | } | |
75 | ||
76 | fclose (f); | |
77 | ||
78 | unlink (name); | |
79 | exit (0); | |
80 | } |