tc.disc.c revision 145479 
1/* $Header: /src/pub/tcsh/tc.disc.c,v 3.15 2004/11/23 02:10:49 christos Exp $ */
2/*
3 * tc.disc.c: Functions to set/clear line disciplines
4 *
5 */
6/*-
7 * Copyright (c) 1980, 1991 The Regents of the University of California.
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34#include "sh.h"
35
36RCSID("$Id: tc.disc.c,v 3.15 2004/11/23 02:10:49 christos Exp $")
37
38#ifdef OREO
39#include <compat.h>
40#endif	/* OREO */
41
42#include "ed.h"
43
44static int add_discipline = 0;	/* Did we add a line discipline	 */
45
46#if defined(IRIS4D) || defined(OREO) || defined(sonyrisc)
47# define HAVE_DISC
48# ifndef POSIX
49static struct termio otermiob;
50# else
51static struct termios otermiob;
52# endif /* POSIX */
53#endif	/* IRIS4D || OREO */
54
55#ifdef _IBMR2
56# define HAVE_DISC
57char    strPOSIX[] = "posix";
58#endif	/* _IBMR2 */
59
60#if !defined(HAVE_DISC) && defined(TIOCGETD) && defined(NTTYDISC)
61static int oldisc;
62#endif /* !HAVE_DISC && TIOCGETD && NTTYDISC */
63
64int
65/*ARGSUSED*/
66setdisc(f)
67int     f;
68{
69#ifdef IRIS4D
70# ifndef POSIX
71    struct termio termiob;
72# else
73    struct termios termiob;
74# endif
75
76    if (ioctl(f, TCGETA, (ioctl_t) & termiob) == 0) {
77	otermiob = termiob;
78#if (SYSVREL < 4) || !defined(IRIS4D)
79	if (termiob.c_line != NTTYDISC || termiob.c_cc[VSWTCH] == 0) { /*}*/
80	    termiob.c_line = NTTYDISC;
81#else
82	if (termiob.c_cc[VSWTCH] == 0) {
83#endif
84	    termiob.c_cc[VSWTCH] = CSWTCH;
85	    if (ioctl(f, TCSETA, (ioctl_t) & termiob) != 0)
86		return (-1);
87	}
88    }
89    else
90	return (-1);
91    add_discipline = 1;
92    return (0);
93#endif /* IRIS4D */
94
95
96#ifdef OREO
97# ifndef POSIX
98    struct termio termiob;
99# else
100    struct termios termiob;
101# endif
102
103    struct ltchars ltcbuf;
104
105    if (ioctl(f, TCGETA, (ioctl_t) & termiob) == 0) {
106	int comp = getcompat(COMPAT_BSDTTY);
107	otermiob = termiob;
108	if ((comp & COMPAT_BSDTTY) != COMPAT_BSDTTY) {
109	    (void) setcompat(comp | COMPAT_BSDTTY);
110	    if (ioctl(f, TIOCGLTC, (ioctl_t) & ltcbuf) != 0)
111		xprintf(CGETS(21, 1, "Couldn't get local chars.\n"));
112	    else {
113		ltcbuf.t_suspc = CTL_ESC('\032');        /* ^Z */
114		ltcbuf.t_dsuspc = CTL_ESC('\031');       /* ^Y */
115		ltcbuf.t_rprntc = CTL_ESC('\022');       /* ^R */
116		ltcbuf.t_flushc = CTL_ESC('\017');       /* ^O */
117		ltcbuf.t_werasc = CTL_ESC('\027');       /* ^W */
118		ltcbuf.t_lnextc = CTL_ESC('\026');       /* ^V */
119		if (ioctl(f, TIOCSLTC, (ioctl_t) & ltcbuf) != 0)
120		    xprintf(CGETS(21, 2, "Couldn't set local chars.\n"));
121	    }
122	    termiob.c_cc[VSWTCH] = '\0';
123	    if (ioctl(f, TCSETAF, (ioctl_t) & termiob) != 0)
124		return (-1);
125	}
126    }
127    else
128	return (-1);
129    add_discipline = 1;
130    return (0);
131#endif				/* OREO */
132
133
134#ifdef _IBMR2
135    union txname tx;
136
137    tx.tx_which = 0;
138
139    if (ioctl(f, TXGETLD, (ioctl_t) & tx) == 0) {
140	if (strcmp(tx.tx_name, strPOSIX) != 0)
141	    if (ioctl(f, TXADDCD, (ioctl_t) strPOSIX) == 0) {
142		add_discipline = 1;
143		return (0);
144	    }
145	return (0);
146    }
147    else
148	return (-1);
149#endif	/* _IBMR2 */
150
151#ifndef HAVE_DISC
152# if defined(TIOCGETD) && defined(NTTYDISC)
153    if (ioctl(f, TIOCGETD, (ioctl_t) & oldisc) == 0) {
154	if (oldisc != NTTYDISC) {
155	    int     ldisc = NTTYDISC;
156
157	    if (ioctl(f, TIOCSETD, (ioctl_t) & ldisc) != 0)
158		return (-1);
159	    add_discipline = 1;
160	}
161	else
162	    oldisc = -1;
163	return (0);
164    }
165    else
166	return (-1);
167# else
168    USE(f);
169    return (0);
170# endif	/* TIOCGETD && NTTYDISC */
171#endif	/* !HAVE_DISC */
172} /* end setdisc */
173
174
175int
176/*ARGSUSED*/
177resetdisc(f)
178int f;
179{
180    if (add_discipline) {
181	add_discipline = 0;
182#if defined(OREO) || defined(IRIS4D)
183	return (ioctl(f, TCSETAF, (ioctl_t) & otermiob));
184#endif /* OREO || IRIS4D */
185
186#ifdef _IBMR2
187	return (ioctl(f, TXDELCD, (ioctl_t) strPOSIX));
188#endif /* _IBMR2 */
189
190#ifndef HAVE_DISC
191# if defined(TIOCSETD) && defined(NTTYDISC)
192	return (ioctl(f, TIOCSETD, (ioctl_t) & oldisc));
193# endif /* TIOCSETD && NTTYDISC */
194#endif /* !HAVE_DISC */
195    }
196    USE(f);
197    return (0);
198} /* end resetdisc */
199