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1 | // SPDX-License-Identifier: GPL-2.0 |
2 | #include <linux/termios_internal.h> | |
1d5d6682 AV |
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(termio, &v, 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(k->c_cc, 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(u->c_cc, 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(k->c_cc, 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(u->c_cc, 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 | } |