1//===-- Linux implementation of cfsetospeed -------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "src/termios/cfsetospeed.h"
10#include "src/errno/libc_errno.h"
11
12#include "src/__support/common.h"
13
14#include <termios.h>
15
16namespace LIBC_NAMESPACE {
17
18LLVM_LIBC_FUNCTION(int, cfsetospeed, (struct termios * t, speed_t speed)) {
19 constexpr speed_t NOT_SPEED_MASK = ~speed_t(CBAUD);
20 // A speed value is valid only if it is equal to one of the B<NN+> values.
21 if (t == nullptr || ((speed & NOT_SPEED_MASK) != 0)) {
22 libc_errno = EINVAL;
23 return -1;
24 }
25
26 t->c_cflag = (t->c_cflag & NOT_SPEED_MASK) | speed;
27 t->c_ospeed = speed;
28 return 0;
29}
30
31} // namespace LIBC_NAMESPACE
32

source code of libc/src/termios/linux/cfsetospeed.cpp