| 1 | //===-- Linux implementation of tcgetattr ---------------------------------===// |
|---|---|
| 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/tcgetattr.h" |
| 10 | #include "kernel_termios.h" |
| 11 | |
| 12 | #include "src/__support/OSUtil/syscall.h" |
| 13 | #include "src/__support/common.h" |
| 14 | #include "src/errno/libc_errno.h" |
| 15 | |
| 16 | #include <asm/ioctls.h> // Safe to include without the risk of name pollution. |
| 17 | #include <sys/syscall.h> // For syscall numbers |
| 18 | #include <termios.h> |
| 19 | |
| 20 | namespace LIBC_NAMESPACE { |
| 21 | |
| 22 | LLVM_LIBC_FUNCTION(int, tcgetattr, (int fd, struct termios *t)) { |
| 23 | LIBC_NAMESPACE::kernel_termios kt; |
| 24 | int ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_ioctl, ts: fd, TCGETS, ts: &kt); |
| 25 | if (ret < 0) { |
| 26 | libc_errno = -ret; |
| 27 | return -1; |
| 28 | } |
| 29 | t->c_iflag = kt.c_iflag; |
| 30 | t->c_oflag = kt.c_oflag; |
| 31 | t->c_cflag = kt.c_cflag; |
| 32 | t->c_lflag = kt.c_lflag; |
| 33 | t->c_ispeed = kt.c_cflag & CBAUD; |
| 34 | t->c_ospeed = kt.c_cflag & CBAUD; |
| 35 | |
| 36 | size_t nccs = KERNEL_NCCS <= NCCS ? KERNEL_NCCS : NCCS; |
| 37 | for (size_t i = 0; i < nccs; ++i) |
| 38 | t->c_cc[i] = kt.c_cc[i]; |
| 39 | if (NCCS > nccs) { |
| 40 | for (size_t i = nccs; i < NCCS; ++i) |
| 41 | t->c_cc[i] = 0; |
| 42 | } |
| 43 | return 0; |
| 44 | } |
| 45 | |
| 46 | } // namespace LIBC_NAMESPACE |
| 47 |