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 <linux/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 */
user_termio_to_kernel_termios(struct ktermios * termios,struct termio __user * termio)29 static 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(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 */
kernel_termios_to_user_termio(struct termio __user * termio,struct ktermios * termios)59 static inline int kernel_termios_to_user_termio(struct termio __user *termio,
60 struct ktermios *termios)
61 {
62 int err;
63
64 if (!access_ok(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
user_termios_to_kernel_termios(struct ktermios __user * k,struct termios2 * u)81 static 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
kernel_termios_to_user_termios(struct termios2 __user * u,struct ktermios * k)87 static 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
user_termios_to_kernel_termios_1(struct ktermios * k,struct termios __user * u)93 static 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
kernel_termios_to_user_termios_1(struct termios __user * u,struct ktermios * k)99 static 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