1 | /* Copyright (C) 1991-2022 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either |
7 | version 2.1 of the License, or (at your option) any later version. |
8 | |
9 | The GNU C Library 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 GNU |
12 | Lesser General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, see |
16 | <https://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <errno.h> |
19 | #include <termios.h> |
20 | |
21 | /* Suspend or restart transmission on FD. */ |
22 | int |
23 | tcflow (int fd, int action) |
24 | { |
25 | if (fd < 0) |
26 | { |
27 | __set_errno (EBADF); |
28 | return -1; |
29 | } |
30 | |
31 | switch (action) |
32 | { |
33 | case TCOOFF: |
34 | case TCOON: |
35 | case TCIOFF: |
36 | case TCION: |
37 | break; |
38 | |
39 | default: |
40 | __set_errno (EINVAL); |
41 | return -1; |
42 | } |
43 | |
44 | __set_errno (ENOSYS); |
45 | return -1; |
46 | } |
47 | |
48 | |
49 | stub_warning (tcflow) |
50 | |