Root/include/asm-generic/termios-base.h

1/* termios.h: generic termios/termio user copying/translation
2 */
3
4#ifndef _ASM_GENERIC_TERMIOS_BASE_H
5#define _ASM_GENERIC_TERMIOS_BASE_H
6
7#include <asm/uaccess.h>
8
9#ifndef __ARCH_TERMIO_GETPUT
10
11/*
12 * Translate a "termio" structure into a "termios". Ugh.
13 */
14static inline int user_termio_to_kernel_termios(struct ktermios *termios,
15                        struct termio __user *termio)
16{
17    unsigned short tmp;
18
19    if (get_user(tmp, &termio->c_iflag) < 0)
20        goto fault;
21    termios->c_iflag = (0xffff0000 & termios->c_iflag) | tmp;
22
23    if (get_user(tmp, &termio->c_oflag) < 0)
24        goto fault;
25    termios->c_oflag = (0xffff0000 & termios->c_oflag) | tmp;
26
27    if (get_user(tmp, &termio->c_cflag) < 0)
28        goto fault;
29    termios->c_cflag = (0xffff0000 & termios->c_cflag) | tmp;
30
31    if (get_user(tmp, &termio->c_lflag) < 0)
32        goto fault;
33    termios->c_lflag = (0xffff0000 & termios->c_lflag) | tmp;
34
35    if (get_user(termios->c_line, &termio->c_line) < 0)
36        goto fault;
37
38    if (copy_from_user(termios->c_cc, termio->c_cc, NCC) != 0)
39        goto fault;
40
41    return 0;
42
43 fault:
44    return -EFAULT;
45}
46
47/*
48 * Translate a "termios" structure into a "termio". Ugh.
49 */
50static inline int kernel_termios_to_user_termio(struct termio __user *termio,
51                        struct ktermios *termios)
52{
53    if (put_user(termios->c_iflag, &termio->c_iflag) < 0 ||
54        put_user(termios->c_oflag, &termio->c_oflag) < 0 ||
55        put_user(termios->c_cflag, &termio->c_cflag) < 0 ||
56        put_user(termios->c_lflag, &termio->c_lflag) < 0 ||
57        put_user(termios->c_line, &termio->c_line) < 0 ||
58        copy_to_user(termio->c_cc, termios->c_cc, NCC) != 0)
59        return -EFAULT;
60
61    return 0;
62}
63
64#ifndef user_termios_to_kernel_termios
65#define user_termios_to_kernel_termios(k, u) copy_from_user(k, u, sizeof(struct termios))
66#endif
67
68#ifndef kernel_termios_to_user_termios
69#define kernel_termios_to_user_termios(u, k) copy_to_user(u, k, sizeof(struct termios))
70#endif
71
72#define user_termios_to_kernel_termios_1(k, u) copy_from_user(k, u, sizeof(struct termios))
73#define kernel_termios_to_user_termios_1(u, k) copy_to_user(u, k, sizeof(struct termios))
74
75#endif /* __ARCH_TERMIO_GETPUT */
76
77#endif /* _ASM_GENERIC_TERMIOS_BASE_H */
78

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