1b2a294bcSSiva Chandra Reddy //===-- Linux implementation of tcsendbreak -------------------------------===// 2b2a294bcSSiva Chandra Reddy // 3b2a294bcSSiva Chandra Reddy // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4b2a294bcSSiva Chandra Reddy // See https://llvm.org/LICENSE.txt for license information. 5b2a294bcSSiva Chandra Reddy // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6b2a294bcSSiva Chandra Reddy // 7b2a294bcSSiva Chandra Reddy //===----------------------------------------------------------------------===// 8b2a294bcSSiva Chandra Reddy 9b2a294bcSSiva Chandra Reddy #include "src/termios/tcsendbreak.h" 10b2a294bcSSiva Chandra Reddy 11b2a294bcSSiva Chandra Reddy #include "src/__support/OSUtil/syscall.h" 12b2a294bcSSiva Chandra Reddy #include "src/__support/common.h" 13*5ff3ff33SPetr Hosek #include "src/__support/macros/config.h" 147abf6c25SSiva Chandra Reddy #include "src/errno/libc_errno.h" 15b2a294bcSSiva Chandra Reddy 16b2a294bcSSiva Chandra Reddy #include <asm/ioctls.h> // Safe to include without the risk of name pollution. 17b2a294bcSSiva Chandra Reddy #include <sys/syscall.h> // For syscall numbers 18b2a294bcSSiva Chandra Reddy #include <termios.h> 19b2a294bcSSiva Chandra Reddy 20*5ff3ff33SPetr Hosek namespace LIBC_NAMESPACE_DECL { 21b2a294bcSSiva Chandra Reddy 22b2a294bcSSiva Chandra Reddy LLVM_LIBC_FUNCTION(pid_t, tcsendbreak, (int fd, int /* unused duration */)) { 23b2a294bcSSiva Chandra Reddy // POSIX leaves the behavior for non-zero duration implementation dependent. 24b2a294bcSSiva Chandra Reddy // Which means that the behavior can be the same as it is when duration is 25b2a294bcSSiva Chandra Reddy // zero. So, we just pass zero to the syscall. 26b6bc9d72SGuillaume Chatelet int ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_ioctl, fd, TCSBRK, 0); 27b2a294bcSSiva Chandra Reddy if (ret < 0) { 287abf6c25SSiva Chandra Reddy libc_errno = -ret; 29b2a294bcSSiva Chandra Reddy return -1; 30b2a294bcSSiva Chandra Reddy } 31b2a294bcSSiva Chandra Reddy return 0; 32b2a294bcSSiva Chandra Reddy } 33b2a294bcSSiva Chandra Reddy 34*5ff3ff33SPetr Hosek } // namespace LIBC_NAMESPACE_DECL 35