1 // SPDX-License-Identifier: GPL-2.0 1
2 #include <linux/termios_internal.h>
3
4 /*
5 * c_cc characters in the termio structure. O
6 * backwardly compatible. Notice that charact
7 * interpreted differently depending on whethe
8 * c_lflag. If it's set, they are used as _VE
9 * as _VMIN and V_TIME. This is for compatibi
10 * is compatible with sysV)...
11 */
12 #define _VMIN 4
13 #define _VTIME 5
14
15 int kernel_termios_to_user_termio(struct termi
16
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[
28 v.c_cc[_VTIME] = termios->c_cc
29 }
30 return copy_to_user(termio, &v, sizeof
31 }
32
33 int user_termios_to_kernel_termios(struct kter
34
35 {
36 int err;
37 err = get_user(k->c_iflag, &u->c_ifla
38 err |= get_user(k->c_oflag, &u->c_ofla
39 err |= get_user(k->c_cflag, &u->c_cfla
40 err |= get_user(k->c_lflag, &u->c_lfla
41 err |= get_user(k->c_line, &u->c_line
42 err |= copy_from_user(k->c_cc, u->c_cc
43 if (k->c_lflag & ICANON) {
44 err |= get_user(k->c_cc[VEOF],
45 err |= get_user(k->c_cc[VEOL],
46 } else {
47 err |= get_user(k->c_cc[VMIN],
48 err |= get_user(k->c_cc[VTIME]
49 }
50 err |= get_user(k->c_ispeed, &u->c_is
51 err |= get_user(k->c_ospeed, &u->c_os
52 return err;
53 }
54
55 int kernel_termios_to_user_termios(struct term
56
57 {
58 int err;
59 err = put_user(k->c_iflag, &u->c_ifla
60 err |= put_user(k->c_oflag, &u->c_ofla
61 err |= put_user(k->c_cflag, &u->c_cfla
62 err |= put_user(k->c_lflag, &u->c_lfla
63 err |= put_user(k->c_line, &u->c_line)
64 err |= copy_to_user(u->c_cc, k->c_cc,
65 if (!(k->c_lflag & ICANON)) {
66 err |= put_user(k->c_cc[VMIN],
67 err |= put_user(k->c_cc[VTIME]
68 } else {
69 err |= put_user(k->c_cc[VEOF],
70 err |= put_user(k->c_cc[VEOL],
71 }
72 err |= put_user(k->c_ispeed, &u->c_isp
73 err |= put_user(k->c_ospeed, &u->c_osp
74 return err;
75 }
76
77 int user_termios_to_kernel_termios_1(struct kt
78
79 {
80 int err;
81 err = get_user(k->c_iflag, &u->c_ifla
82 err |= get_user(k->c_oflag, &u->c_ofla
83 err |= get_user(k->c_cflag, &u->c_cfla
84 err |= get_user(k->c_lflag, &u->c_lfla
85 err |= get_user(k->c_line, &u->c_line
86 err |= copy_from_user(k->c_cc, u->c_cc
87 if (k->c_lflag & ICANON) {
88 err |= get_user(k->c_cc[VEOF],
89 err |= get_user(k->c_cc[VEOL],
90 } else {
91 err |= get_user(k->c_cc[VMIN],
92 err |= get_user(k->c_cc[VTIME]
93 }
94 return err;
95 }
96
97 int kernel_termios_to_user_termios_1(struct te
98
99 {
100 int err;
101 err = put_user(k->c_iflag, &u->c_ifla
102 err |= put_user(k->c_oflag, &u->c_ofla
103 err |= put_user(k->c_cflag, &u->c_cfla
104 err |= put_user(k->c_lflag, &u->c_lfla
105 err |= put_user(k->c_line, &u->c_line)
106 err |= copy_to_user(u->c_cc, k->c_cc,
107 if (!(k->c_lflag & ICANON)) {
108 err |= put_user(k->c_cc[VMIN],
109 err |= put_user(k->c_cc[VTIME]
110 } else {
111 err |= put_user(k->c_cc[VEOF],
112 err |= put_user(k->c_cc[VEOL],
113 }
114 return err;
115 }
116
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