1 | /* Copyright (C) 1992, 1996, 1997 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, write to the Free |
---|
16 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
---|
17 | 02111-1307 USA. */ |
---|
18 | |
---|
19 | /* Modified for newlib, May 27, 2002, by Jeff Johnston */ |
---|
20 | |
---|
21 | #include <errno.h> |
---|
22 | #include <stddef.h> |
---|
23 | #include <signal.h> |
---|
24 | #include <termios.h> |
---|
25 | #include <unistd.h> |
---|
26 | #include <sys/ioctl.h> |
---|
27 | |
---|
28 | /* Send zero bits on FD. */ |
---|
29 | int |
---|
30 | tcsendbreak (fd, duration) |
---|
31 | int fd; |
---|
32 | int duration; |
---|
33 | { |
---|
34 | /* The break lasts 0.25 to 0.5 seconds if DURATION is zero, |
---|
35 | and an implementation-defined period if DURATION is nonzero. |
---|
36 | We define a positive DURATION to be number of milliseconds to break. */ |
---|
37 | if (duration <= 0) |
---|
38 | return ioctl (fd, TCSBRK, 0); |
---|
39 | |
---|
40 | /* ioctl can't send a break of any other duration for us. |
---|
41 | This could be changed to use trickery (e.g. lower speed and |
---|
42 | send a '\0') to send the break, but for now just return an error. */ |
---|
43 | errno = (EINVAL); |
---|
44 | return -1; |
---|
45 | } |
---|