1 | // SPDX-License-Identifier: GPL-2.0 |
2 | #include <linux/termios_internal.h> |
3 | |
4 | /* |
5 | * c_cc characters in the termio structure. Oh, how I love being |
6 | * backwardly compatible. Notice that character 4 and 5 are |
7 | * interpreted differently depending on whether ICANON is set in |
8 | * c_lflag. If it's set, they are used as _VEOF and _VEOL, otherwise |
9 | * as _VMIN and V_TIME. This is for compatibility with OSF/1 (which |
10 | * is compatible with sysV)... |
11 | */ |
12 | #define _VMIN 4 |
13 | #define _VTIME 5 |
14 | |
15 | int kernel_termios_to_user_termio(struct termio __user *termio, |
16 | struct ktermios *termios) |
17 | { |
18 | struct termio v; |
19 | memset(&v, 0, sizeof(struct termio)); |
20 | v.c_iflag = termios->c_iflag; |
21 | v.c_oflag = termios->c_oflag; |
22 | v.c_cflag = termios->c_cflag; |
23 | v.c_lflag = termios->c_lflag; |
24 | v.c_line = termios->c_line; |
25 | memcpy(v.c_cc, termios->c_cc, NCC); |
26 | if (!(v.c_lflag & ICANON)) { |
27 | v.c_cc[_VMIN] = termios->c_cc[VMIN]; |
28 | v.c_cc[_VTIME] = termios->c_cc[VTIME]; |
29 | } |
30 | return copy_to_user(to: termio, from: &v, n: sizeof(struct termio)); |
31 | } |
32 | |
33 | int user_termios_to_kernel_termios(struct ktermios *k, |
34 | struct termios2 __user *u) |
35 | { |
36 | int err; |
37 | err = get_user(k->c_iflag, &u->c_iflag); |
38 | err |= get_user(k->c_oflag, &u->c_oflag); |
39 | err |= get_user(k->c_cflag, &u->c_cflag); |
40 | err |= get_user(k->c_lflag, &u->c_lflag); |
41 | err |= get_user(k->c_line, &u->c_line); |
42 | err |= copy_from_user(to: k->c_cc, from: u->c_cc, NCCS); |
43 | if (k->c_lflag & ICANON) { |
44 | err |= get_user(k->c_cc[VEOF], &u->c_cc[VEOF]); |
45 | err |= get_user(k->c_cc[VEOL], &u->c_cc[VEOL]); |
46 | } else { |
47 | err |= get_user(k->c_cc[VMIN], &u->c_cc[_VMIN]); |
48 | err |= get_user(k->c_cc[VTIME], &u->c_cc[_VTIME]); |
49 | } |
50 | err |= get_user(k->c_ispeed, &u->c_ispeed); |
51 | err |= get_user(k->c_ospeed, &u->c_ospeed); |
52 | return err; |
53 | } |
54 | |
55 | int kernel_termios_to_user_termios(struct termios2 __user *u, |
56 | struct ktermios *k) |
57 | { |
58 | int err; |
59 | err = put_user(k->c_iflag, &u->c_iflag); |
60 | err |= put_user(k->c_oflag, &u->c_oflag); |
61 | err |= put_user(k->c_cflag, &u->c_cflag); |
62 | err |= put_user(k->c_lflag, &u->c_lflag); |
63 | err |= put_user(k->c_line, &u->c_line); |
64 | err |= copy_to_user(to: u->c_cc, from: k->c_cc, NCCS); |
65 | if (!(k->c_lflag & ICANON)) { |
66 | err |= put_user(k->c_cc[VMIN], &u->c_cc[_VMIN]); |
67 | err |= put_user(k->c_cc[VTIME], &u->c_cc[_VTIME]); |
68 | } else { |
69 | err |= put_user(k->c_cc[VEOF], &u->c_cc[VEOF]); |
70 | err |= put_user(k->c_cc[VEOL], &u->c_cc[VEOL]); |
71 | } |
72 | err |= put_user(k->c_ispeed, &u->c_ispeed); |
73 | err |= put_user(k->c_ospeed, &u->c_ospeed); |
74 | return err; |
75 | } |
76 | |
77 | int user_termios_to_kernel_termios_1(struct ktermios *k, |
78 | struct termios __user *u) |
79 | { |
80 | int err; |
81 | err = get_user(k->c_iflag, &u->c_iflag); |
82 | err |= get_user(k->c_oflag, &u->c_oflag); |
83 | err |= get_user(k->c_cflag, &u->c_cflag); |
84 | err |= get_user(k->c_lflag, &u->c_lflag); |
85 | err |= get_user(k->c_line, &u->c_line); |
86 | err |= copy_from_user(to: k->c_cc, from: u->c_cc, NCCS); |
87 | if (k->c_lflag & ICANON) { |
88 | err |= get_user(k->c_cc[VEOF], &u->c_cc[VEOF]); |
89 | err |= get_user(k->c_cc[VEOL], &u->c_cc[VEOL]); |
90 | } else { |
91 | err |= get_user(k->c_cc[VMIN], &u->c_cc[_VMIN]); |
92 | err |= get_user(k->c_cc[VTIME], &u->c_cc[_VTIME]); |
93 | } |
94 | return err; |
95 | } |
96 | |
97 | int kernel_termios_to_user_termios_1(struct termios __user *u, |
98 | struct ktermios *k) |
99 | { |
100 | int err; |
101 | err = put_user(k->c_iflag, &u->c_iflag); |
102 | err |= put_user(k->c_oflag, &u->c_oflag); |
103 | err |= put_user(k->c_cflag, &u->c_cflag); |
104 | err |= put_user(k->c_lflag, &u->c_lflag); |
105 | err |= put_user(k->c_line, &u->c_line); |
106 | err |= copy_to_user(to: u->c_cc, from: k->c_cc, NCCS); |
107 | if (!(k->c_lflag & ICANON)) { |
108 | err |= put_user(k->c_cc[VMIN], &u->c_cc[_VMIN]); |
109 | err |= put_user(k->c_cc[VTIME], &u->c_cc[_VTIME]); |
110 | } else { |
111 | err |= put_user(k->c_cc[VEOF], &u->c_cc[VEOF]); |
112 | err |= put_user(k->c_cc[VEOL], &u->c_cc[VEOL]); |
113 | } |
114 | return err; |
115 | } |
116 | |