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(&v, termio, 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(termio, &v, sizeof(struct termio));
56 }
57
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