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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* termios.h: generic termios/termio user copying/translation
2 */
3
4#ifndef _ASM_GENERIC_TERMIOS_H
5#define _ASM_GENERIC_TERMIOS_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 */
Alan Cox606d0992006-12-08 02:38:45 -080014static inline int user_termio_to_kernel_termios(struct ktermios *termios,
Linus Torvalds1da177e2005-04-16 15:20:36 -070015 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,
Alan Cox606d0992006-12-08 02:38:45 -080051 struct ktermios *termios)
Linus Torvalds1da177e2005-04-16 15:20:36 -070052{
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
Heiko Carstensaa7738a2008-02-08 04:18:39 -080064#ifndef user_termios_to_kernel_termios
Linus Torvalds1da177e2005-04-16 15:20:36 -070065#define user_termios_to_kernel_termios(k, u) copy_from_user(k, u, sizeof(struct termios))
Heiko Carstensaa7738a2008-02-08 04:18:39 -080066#endif
67
68#ifndef kernel_termios_to_user_termios
Linus Torvalds1da177e2005-04-16 15:20:36 -070069#define kernel_termios_to_user_termios(u, k) copy_to_user(u, k, sizeof(struct termios))
Heiko Carstensaa7738a2008-02-08 04:18:39 -080070#endif
71
Paul Mackerrasb0052fca2007-09-13 01:16:31 +100072#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))
Linus Torvalds1da177e2005-04-16 15:20:36 -070074
75#endif /* __ARCH_TERMIO_GETPUT */
76
77#endif /* _ASM_GENERIC_TERMIOS_H */