1 /* Test posix_spawn_file_actions_adddup2() 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 of the License, or
7 (at your option) 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 <spawn.h>
20
21 #include "signature.h"
22 SIGNATURE_CHECK (posix_spawn_file_actions_adddup2, int,
23 (posix_spawn_file_actions_t *, int, int));
24
25 #include <errno.h>
26 #include <limits.h>
27 #include <unistd.h>
28
29 #include "macros.h"
30
31 /* Return a file descriptor that is too big to use.
32 Prefer the smallest such fd, except use OPEN_MAX if it is defined
33 and is greater than getdtablesize (), as that's how OS X works. */
34 static int
big_fd(void)35 big_fd (void)
36 {
37 int fd = getdtablesize ();
38 #ifdef OPEN_MAX
39 if (fd < OPEN_MAX)
40 fd = OPEN_MAX;
41 #endif
42 return fd;
43 }
44
45 int
main(void)46 main (void)
47 {
48 int bad_fd = big_fd ();
49 posix_spawn_file_actions_t actions;
50
51 ASSERT (posix_spawn_file_actions_init (&actions) == 0);
52
53 /* Test behaviour for invalid file descriptors. */
54 {
55 errno = 0;
56 ASSERT (posix_spawn_file_actions_adddup2 (&actions, -1, 2) == EBADF);
57 }
58 {
59 errno = 0;
60 ASSERT (posix_spawn_file_actions_adddup2 (&actions, bad_fd, 2) == EBADF);
61 }
62 {
63 errno = 0;
64 ASSERT (posix_spawn_file_actions_adddup2 (&actions, 2, -1) == EBADF);
65 }
66 {
67 errno = 0;
68 ASSERT (posix_spawn_file_actions_adddup2 (&actions, 2, bad_fd) == EBADF);
69 }
70
71 posix_spawn_file_actions_destroy (&actions);
72
73 return 0;
74 }
75