| 1 | //===-- Linux implementation of tcsendbreak -------------------------------===// |
|---|---|
| 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/tcsendbreak.h" |
| 10 | |
| 11 | #include "src/__support/OSUtil/syscall.h" |
| 12 | #include "src/__support/common.h" |
| 13 | #include "src/errno/libc_errno.h" |
| 14 | |
| 15 | #include <asm/ioctls.h> // Safe to include without the risk of name pollution. |
| 16 | #include <sys/syscall.h> // For syscall numbers |
| 17 | #include <termios.h> |
| 18 | |
| 19 | namespace LIBC_NAMESPACE { |
| 20 | |
| 21 | LLVM_LIBC_FUNCTION(pid_t, tcsendbreak, (int fd, int /* unused duration */)) { |
| 22 | // POSIX leaves the behavior for non-zero duration implementation dependent. |
| 23 | // Which means that the behavior can be the same as it is when duration is |
| 24 | // zero. So, we just pass zero to the syscall. |
| 25 | int ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_ioctl, ts: fd, TCSBRK, ts: 0); |
| 26 | if (ret < 0) { |
| 27 | libc_errno = -ret; |
| 28 | return -1; |
| 29 | } |
| 30 | return 0; |
| 31 | } |
| 32 | |
| 33 | } // namespace LIBC_NAMESPACE |
| 34 |