1/* 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 */
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#define user_termios_to_kernel_termios(k, u) copy_from_user(k, u, sizeof(struct termios))
65#define kernel_termios_to_user_termios(u, k) copy_to_user(u, k, sizeof(struct termios))
66
67#endif	/* __ARCH_TERMIO_GETPUT */
68
69#endif /* _ASM_GENERIC_TERMIOS_H */
70