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1/* Test setvbuf on readonly fopen (using mmap stdio).
2 Copyright (C) 2002-2019 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Jakub Jelinek <jakub@redhat.com>, 2002.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>. */
19
20#include <stdio.h>
21#include <stdlib.h>
22#include <string.h>
23#include <unistd.h>
24
25int main (void)
26{
27 char name[] = "/tmp/tst-mmap-setvbuf.XXXXXX";
28 char buf[4096];
29 const char * const test = "Let's see if mmap stdio works with setvbuf.\n";
30 char temp[strlen (test) + 1];
31 int fd = mkstemp (name);
32 FILE *f;
33
34 if (fd == -1)
35 {
36 printf ("%u: cannot open temporary file: %m\n", __LINE__);
37 exit (1);
38 }
39
40 f = fdopen (fd, "w");
41 if (f == NULL)
42 {
43 printf ("%u: cannot fdopen temporary file: %m\n", __LINE__);
44 exit (1);
45 }
46
47 fputs (test, f);
48 fclose (f);
49
50 f = fopen (name, "rm");
51 if (f == NULL)
52 {
53 printf ("%u: cannot fopen temporary file: %m\n", __LINE__);
54 exit (1);
55 }
56
57 if (setvbuf (f, buf, _IOFBF, sizeof buf))
58 {
59 printf ("%u: setvbuf failed: %m\n", __LINE__);
60 exit (1);
61 }
62
63 if (fread (temp, 1, strlen (test), f) != strlen (test))
64 {
65 printf ("%u: couldn't read the file back: %m\n", __LINE__);
66 exit (1);
67 }
68 temp [strlen (test)] = '\0';
69
70 if (strcmp (test, temp))
71 {
72 printf ("%u: read different string than was written:\n%s%s",
73 __LINE__, test, temp);
74 exit (1);
75 }
76
77 fclose (f);
78
79 unlink (name);
80 exit (0);
81}
82

Warning: That file was not part of the compilation database. It may have many parsing errors.