1 /* Test of closein module.
2 Copyright (C) 2007-2021 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 /* Written by Eric Blake. */
18
19 #include <config.h>
20
21 #include "closein.h"
22
23 #include <stdio.h>
24 #include <stdlib.h>
25 #include <unistd.h>
26
27 #include "binary-io.h"
28 #include "ignore-value.h"
29
30 /* With no arguments, do nothing. With arguments, attempt to consume
31 first 6 bytes of stdin. In either case, let exit() take care of
32 closing std streams and changing exit status if ferror(stdin). */
33 int
main(int argc,char ** argv)34 main (int argc, char **argv)
35 {
36 char buf[7];
37 atexit (close_stdin);
38
39 /* close_stdin currently relies on ftell, but mingw ftell is
40 unreliable on text mode input. */
41 set_binary_mode (0, O_BINARY);
42
43 if (argc > 2)
44 close (0);
45
46 if (argc > 1)
47 ignore_value (fread (buf, 1, 6, stdin));
48 return 0;
49 }
50