termios.h revision 61730c538f8281efa7ac12596da9f3f9a31b9272 
1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License.  See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 1995, 1996, 2000, 2001 by Ralf Baechle
7 * Copyright (C) 2000, 2001 Silicon Graphics, Inc.
8 */
9#ifndef _ASM_TERMIOS_H
10#define _ASM_TERMIOS_H
11
12#include <asm/uaccess.h>
13#include <uapi/asm/termios.h>
14
15/*
16 *	intr=^C		quit=^\		erase=del	kill=^U
17 *	vmin=\1		vtime=\0	eol2=\0		swtc=\0
18 *	start=^Q	stop=^S		susp=^Z		vdsusp=
19 *	reprint=^R	discard=^U	werase=^W	lnext=^V
20 *	eof=^D		eol=\0
21 */
22#define INIT_C_CC "\003\034\177\025\1\0\0\0\021\023\032\0\022\017\027\026\004\0"
23
24#include <linux/string.h>
25
26/*
27 * Translate a "termio" structure into a "termios". Ugh.
28 */
29static inline int user_termio_to_kernel_termios(struct ktermios *termios,
30	struct termio __user *termio)
31{
32	unsigned short iflag, oflag, cflag, lflag;
33	unsigned int err;
34
35	if (!access_ok(VERIFY_READ, termio, sizeof(struct termio)))
36		return -EFAULT;
37
38	err = __get_user(iflag, &termio->c_iflag);
39	termios->c_iflag = (termios->c_iflag & 0xffff0000) | iflag;
40	err |=__get_user(oflag, &termio->c_oflag);
41	termios->c_oflag = (termios->c_oflag & 0xffff0000) | oflag;
42	err |=__get_user(cflag, &termio->c_cflag);
43	termios->c_cflag = (termios->c_cflag & 0xffff0000) | cflag;
44	err |=__get_user(lflag, &termio->c_lflag);
45	termios->c_lflag = (termios->c_lflag & 0xffff0000) | lflag;
46	err |=__get_user(termios->c_line, &termio->c_line);
47	if (err)
48		return -EFAULT;
49
50	if (__copy_from_user(termios->c_cc, termio->c_cc, NCC))
51		return -EFAULT;
52
53	return 0;
54}
55
56/*
57 * Translate a "termios" structure into a "termio". Ugh.
58 */
59static inline int kernel_termios_to_user_termio(struct termio __user *termio,
60	struct ktermios *termios)
61{
62	int err;
63
64	if (!access_ok(VERIFY_WRITE, termio, sizeof(struct termio)))
65		return -EFAULT;
66
67	err = __put_user(termios->c_iflag, &termio->c_iflag);
68	err |= __put_user(termios->c_oflag, &termio->c_oflag);
69	err |= __put_user(termios->c_cflag, &termio->c_cflag);
70	err |= __put_user(termios->c_lflag, &termio->c_lflag);
71	err |= __put_user(termios->c_line, &termio->c_line);
72	if (err)
73		return -EFAULT;
74
75	if (__copy_to_user(termio->c_cc, termios->c_cc, NCC))
76		return -EFAULT;
77
78	return 0;
79}
80
81static inline int user_termios_to_kernel_termios(struct ktermios __user *k,
82	struct termios2 *u)
83{
84	return copy_from_user(k, u, sizeof(struct termios2)) ? -EFAULT : 0;
85}
86
87static inline int kernel_termios_to_user_termios(struct termios2 __user *u,
88	struct ktermios *k)
89{
90	return copy_to_user(u, k, sizeof(struct termios2)) ? -EFAULT : 0;
91}
92
93static inline int user_termios_to_kernel_termios_1(struct ktermios *k,
94	struct termios __user *u)
95{
96	return copy_from_user(k, u, sizeof(struct termios)) ? -EFAULT : 0;
97}
98
99static inline int kernel_termios_to_user_termios_1(struct termios __user *u,
100	struct ktermios *k)
101{
102	return copy_to_user(u, k, sizeof(struct termios)) ? -EFAULT : 0;
103}
104
105#endif /* _ASM_TERMIOS_H */
106