1 | // SPDX-License-Identifier: GPL-2.0 |
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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 |