Line data Source code
1 : /* Test of fputc() function.
2 : Copyright (C) 2011-2020 Free Software Foundation, Inc.
3 :
4 : This program is free software; you can redistribute it and/or modify
5 : it under the terms of the GNU General Public License as published by
6 : the Free Software Foundation; either version 3, or (at your option)
7 : any later version.
8 :
9 : This program is distributed in the hope that it will be useful,
10 : but WITHOUT ANY WARRANTY; without even the implied warranty of
11 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 : GNU General Public License for more details.
13 :
14 : You should have received a copy of the GNU General Public License
15 : along with this program; if not, see <https://www.gnu.org/licenses/>. */
16 :
17 : #include <config.h>
18 :
19 : #include <stdio.h>
20 :
21 : #include "signature.h"
22 : SIGNATURE_CHECK (fputc, int, (int, FILE *));
23 :
24 : #include <errno.h>
25 : #include <fcntl.h>
26 : #include <unistd.h>
27 :
28 : #if HAVE_MSVC_INVALID_PARAMETER_HANDLER
29 : # include "msvc-inval.h"
30 : #endif
31 :
32 : #include "macros.h"
33 :
34 : int
35 1 : main (int argc, char **argv)
36 : {
37 1 : const char *filename = "test-fputc.txt";
38 :
39 : /* We don't have an fputc() function that installs an invalid parameter
40 : handler so far. So install that handler here, explicitly. */
41 : #if HAVE_MSVC_INVALID_PARAMETER_HANDLER \
42 : && MSVC_INVALID_PARAMETER_HANDLING == DEFAULT_HANDLING
43 : gl_msvc_inval_ensure_handler ();
44 : #endif
45 :
46 : /* Test that fputc() on an unbuffered stream sets errno if someone else
47 : closes the stream fd behind the back of stdio. */
48 : {
49 1 : FILE *fp = fopen (filename, "w");
50 1 : ASSERT (fp != NULL);
51 1 : setvbuf (fp, NULL, _IONBF, 0);
52 1 : ASSERT (close (fileno (fp)) == 0);
53 1 : errno = 0;
54 1 : ASSERT (fputc ('x', fp) == EOF);
55 1 : ASSERT (errno == EBADF);
56 1 : ASSERT (ferror (fp));
57 1 : fclose (fp);
58 : }
59 :
60 : /* Test that fputc() on an unbuffered stream sets errno if the stream
61 : was constructed with an invalid file descriptor. */
62 : {
63 1 : FILE *fp = fdopen (-1, "w");
64 1 : if (fp != NULL)
65 : {
66 0 : setvbuf (fp, NULL, _IONBF, 0);
67 0 : errno = 0;
68 0 : ASSERT (fputc ('x', fp) == EOF);
69 0 : ASSERT (errno == EBADF);
70 0 : ASSERT (ferror (fp));
71 0 : fclose (fp);
72 : }
73 : }
74 : {
75 : FILE *fp;
76 1 : close (99);
77 1 : fp = fdopen (99, "w");
78 1 : if (fp != NULL)
79 : {
80 0 : setvbuf (fp, NULL, _IONBF, 0);
81 0 : errno = 0;
82 0 : ASSERT (fputc ('x', fp) == EOF);
83 0 : ASSERT (errno == EBADF);
84 0 : ASSERT (ferror (fp));
85 0 : fclose (fp);
86 : }
87 : }
88 :
89 : /* Clean up. */
90 1 : unlink (filename);
91 :
92 1 : return 0;
93 : }
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