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/arch/alpha/include/asm/termios.h

http://github.com/mirrors/linux
C Header | 87 lines | 62 code | 10 blank | 15 comment | 1 complexity | d8eb639ce2ae6f19680de27a9c849b6f MD5 | raw file
 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _ALPHA_TERMIOS_H
 3#define _ALPHA_TERMIOS_H
 4
 5#include <uapi/asm/termios.h>
 6
 7/*	eof=^D		eol=\0		eol2=\0		erase=del
 8	werase=^W	kill=^U		reprint=^R	sxtc=\0
 9	intr=^C		quit=^\		susp=^Z		<OSF/1 VDSUSP>
10	start=^Q	stop=^S		lnext=^V	discard=^U
11	vmin=\1		vtime=\0
12*/
13#define INIT_C_CC "\004\000\000\177\027\025\022\000\003\034\032\000\021\023\026\025\001\000"
14
15/*
16 * Translate a "termio" structure into a "termios". Ugh.
17 */
18
19#define user_termio_to_kernel_termios(a_termios, u_termio)			\
20({										\
21	struct ktermios *k_termios = (a_termios);				\
22	struct termio k_termio;							\
23	int canon, ret;								\
24										\
25	ret = copy_from_user(&k_termio, u_termio, sizeof(k_termio));		\
26	if (!ret) {								\
27		/* Overwrite only the low bits.  */				\
28		*(unsigned short *)&k_termios->c_iflag = k_termio.c_iflag;	\
29		*(unsigned short *)&k_termios->c_oflag = k_termio.c_oflag;	\
30		*(unsigned short *)&k_termios->c_cflag = k_termio.c_cflag;	\
31		*(unsigned short *)&k_termios->c_lflag = k_termio.c_lflag;	\
32		canon = k_termio.c_lflag & ICANON;				\
33										\
34		k_termios->c_cc[VINTR]  = k_termio.c_cc[_VINTR];		\
35		k_termios->c_cc[VQUIT]  = k_termio.c_cc[_VQUIT];		\
36		k_termios->c_cc[VERASE] = k_termio.c_cc[_VERASE];		\
37		k_termios->c_cc[VKILL]  = k_termio.c_cc[_VKILL];		\
38		k_termios->c_cc[VEOL2]  = k_termio.c_cc[_VEOL2];		\
39		k_termios->c_cc[VSWTC]  = k_termio.c_cc[_VSWTC];		\
40		k_termios->c_cc[canon ? VEOF : VMIN]  = k_termio.c_cc[_VEOF];	\
41		k_termios->c_cc[canon ? VEOL : VTIME] = k_termio.c_cc[_VEOL];	\
42	}									\
43	ret;									\
44})
45
46/*
47 * Translate a "termios" structure into a "termio". Ugh.
48 *
49 * Note the "fun" _VMIN overloading.
50 */
51#define kernel_termios_to_user_termio(u_termio, a_termios)		\
52({									\
53	struct ktermios *k_termios = (a_termios);			\
54	struct termio k_termio;						\
55	int canon;							\
56									\
57	k_termio.c_iflag = k_termios->c_iflag;				\
58	k_termio.c_oflag = k_termios->c_oflag;				\
59	k_termio.c_cflag = k_termios->c_cflag;				\
60	canon = (k_termio.c_lflag = k_termios->c_lflag) & ICANON;	\
61									\
62	k_termio.c_line = k_termios->c_line;				\
63	k_termio.c_cc[_VINTR]  = k_termios->c_cc[VINTR];		\
64	k_termio.c_cc[_VQUIT]  = k_termios->c_cc[VQUIT];		\
65	k_termio.c_cc[_VERASE] = k_termios->c_cc[VERASE];		\
66	k_termio.c_cc[_VKILL]  = k_termios->c_cc[VKILL];		\
67	k_termio.c_cc[_VEOF]   = k_termios->c_cc[canon ? VEOF : VMIN];	\
68	k_termio.c_cc[_VEOL]   = k_termios->c_cc[canon ? VEOL : VTIME];	\
69	k_termio.c_cc[_VEOL2]  = k_termios->c_cc[VEOL2];		\
70	k_termio.c_cc[_VSWTC]  = k_termios->c_cc[VSWTC];		\
71									\
72	copy_to_user(u_termio, &k_termio, sizeof(k_termio));		\
73})
74
75#define user_termios_to_kernel_termios(k, u) \
76	copy_from_user(k, u, sizeof(struct termios2))
77
78#define kernel_termios_to_user_termios(u, k) \
79	copy_to_user(u, k, sizeof(struct termios2))
80
81#define user_termios_to_kernel_termios_1(k, u) \
82	copy_from_user(k, u, sizeof(struct termios))
83
84#define kernel_termios_to_user_termios_1(u, k) \
85	copy_to_user(u, k, sizeof(struct termios))
86
87#endif	/* _ALPHA_TERMIOS_H */