| 1 | // SPDX-License-Identifier: GPL-2.0 |
|---|---|
| 2 | #include <linux/termios_internal.h> |
| 3 | |
| 4 | int user_termio_to_kernel_termios(struct ktermios *termios, |
| 5 | struct termio __user *termio) |
| 6 | { |
| 7 | struct termio v; |
| 8 | bool canon; |
| 9 | |
| 10 | if (copy_from_user(to: &v, from: termio, n: sizeof(struct termio))) |
| 11 | return -EFAULT; |
| 12 | |
| 13 | termios->c_iflag = (0xffff0000 & termios->c_iflag) | v.c_iflag; |
| 14 | termios->c_oflag = (0xffff0000 & termios->c_oflag) | v.c_oflag; |
| 15 | termios->c_cflag = (0xffff0000 & termios->c_cflag) | v.c_cflag; |
| 16 | termios->c_lflag = (0xffff0000 & termios->c_lflag) | v.c_lflag; |
| 17 | termios->c_line = (0xffff0000 & termios->c_lflag) | v.c_line; |
| 18 | |
| 19 | canon = v.c_lflag & ICANON; |
| 20 | termios->c_cc[VINTR] = v.c_cc[_VINTR]; |
| 21 | termios->c_cc[VQUIT] = v.c_cc[_VQUIT]; |
| 22 | termios->c_cc[VERASE] = v.c_cc[_VERASE]; |
| 23 | termios->c_cc[VKILL] = v.c_cc[_VKILL]; |
| 24 | termios->c_cc[VEOL2] = v.c_cc[_VEOL2]; |
| 25 | termios->c_cc[VSWTC] = v.c_cc[_VSWTC]; |
| 26 | termios->c_cc[canon ? VEOF : VMIN] = v.c_cc[_VEOF]; |
| 27 | termios->c_cc[canon ? VEOL : VTIME] = v.c_cc[_VEOL]; |
| 28 | |
| 29 | return 0; |
| 30 | } |
| 31 | |
| 32 | int kernel_termios_to_user_termio(struct termio __user *termio, |
| 33 | struct ktermios *termios) |
| 34 | { |
| 35 | struct termio v; |
| 36 | bool canon; |
| 37 | |
| 38 | memset(&v, 0, sizeof(struct termio)); |
| 39 | v.c_iflag = termios->c_iflag; |
| 40 | v.c_oflag = termios->c_oflag; |
| 41 | v.c_cflag = termios->c_cflag; |
| 42 | v.c_lflag = termios->c_lflag; |
| 43 | v.c_line = termios->c_line; |
| 44 | |
| 45 | canon = v.c_lflag & ICANON; |
| 46 | v.c_cc[_VINTR] = termios->c_cc[VINTR]; |
| 47 | v.c_cc[_VQUIT] = termios->c_cc[VQUIT]; |
| 48 | v.c_cc[_VERASE] = termios->c_cc[VERASE]; |
| 49 | v.c_cc[_VKILL] = termios->c_cc[VKILL]; |
| 50 | v.c_cc[_VEOF] = termios->c_cc[canon ? VEOF : VMIN]; |
| 51 | v.c_cc[_VEOL] = termios->c_cc[canon ? VEOL : VTIME]; |
| 52 | v.c_cc[_VEOL2] = termios->c_cc[VEOL2]; |
| 53 | v.c_cc[_VSWTC] = termios->c_cc[VSWTC]; |
| 54 | |
| 55 | return copy_to_user(to: termio, from: &v, n: sizeof(struct termio)); |
| 56 | } |
| 57 |