tc.disc.c revision 59243 
1/* $Header: /src/pub/tcsh/tc.disc.c,v 3.11 1997/10/02 16:36:31 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. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *	This product includes software developed by the University of
21 *	California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 *    may be used to endorse or promote products derived from this software
24 *    without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 */
38#include "sh.h"
39
40RCSID("$Id: tc.disc.c,v 3.11 1997/10/02 16:36:31 christos Exp $")
41
42#ifdef OREO
43#include <compat.h>
44#endif	/* OREO */
45
46#include "ed.term.h"
47
48static bool add_discipline = 0;	/* Did we add a line discipline	 */
49
50#if defined(IRIS4D) || defined(OREO) || defined(sonyrisc)
51# define HAVE_DISC
52# ifndef POSIX
53static struct termio otermiob;
54# else
55static struct termios otermiob;
56# endif /* POSIX */
57#endif	/* IRIS4D || OREO */
58
59#ifdef _IBMR2
60# define HAVE_DISC
61char    strPOSIX[] = "posix";
62#endif	/* _IBMR2 */
63
64#if !defined(HAVE_DISC) && defined(TIOCGETD) && defined(NTTYDISC)
65static int oldisc;
66#endif /* !HAVE_DISC && TIOCGETD && NTTYDISC */
67
68int
69/*ARGSUSED*/
70setdisc(f)
71int     f;
72{
73#ifdef IRIS4D
74# ifndef POSIX
75    struct termio termiob;
76# else
77    struct termios termiob;
78# endif
79
80    if (ioctl(f, TCGETA, (ioctl_t) & termiob) == 0) {
81	otermiob = termiob;
82#if (SYSVREL < 4) || !defined(IRIS4D)
83	if (termiob.c_line != NTTYDISC || termiob.c_cc[VSWTCH] == 0) { /*}*/
84	    termiob.c_line = NTTYDISC;
85#else
86	if (termiob.c_cc[VSWTCH] == 0) {
87#endif
88	    termiob.c_cc[VSWTCH] = CSWTCH;
89	    if (ioctl(f, TCSETA, (ioctl_t) & termiob) != 0)
90		return (-1);
91	}
92    }
93    else
94	return (-1);
95    add_discipline = 1;
96    return (0);
97#endif /* IRIS4D */
98
99
100#ifdef OREO
101# ifndef POSIX
102    struct termio termiob;
103# else
104    struct termios termiob;
105# endif
106
107    struct ltchars ltcbuf;
108
109    if (ioctl(f, TCGETA, (ioctl_t) & termiob) == 0) {
110	int comp = getcompat(COMPAT_BSDTTY);
111	otermiob = termiob;
112	if ((comp & COMPAT_BSDTTY) != COMPAT_BSDTTY) {
113	    (void) setcompat(comp | COMPAT_BSDTTY);
114	    if (ioctl(f, TIOCGLTC, (ioctl_t) & ltcbuf) != 0)
115		xprintf(CGETS(21, 1, "Couldn't get local chars.\n"));
116	    else {
117		ltcbuf.t_suspc = CTL_ESC('\032');        /* ^Z */
118		ltcbuf.t_dsuspc = CTL_ESC('\031');       /* ^Y */
119		ltcbuf.t_rprntc = CTL_ESC('\022');       /* ^R */
120		ltcbuf.t_flushc = CTL_ESC('\017');       /* ^O */
121		ltcbuf.t_werasc = CTL_ESC('\027');       /* ^W */
122		ltcbuf.t_lnextc = CTL_ESC('\026');       /* ^V */
123		if (ioctl(f, TIOCSLTC, (ioctl_t) & ltcbuf) != 0)
124		    xprintf(CGETS(21, 2, "Couldn't set local chars.\n"));
125	    }
126	    termiob.c_cc[VSWTCH] = '\0';
127	    if (ioctl(f, TCSETAF, (ioctl_t) & termiob) != 0)
128		return (-1);
129	}
130    }
131    else
132	return (-1);
133    add_discipline = 1;
134    return (0);
135#endif				/* OREO */
136
137
138#ifdef _IBMR2
139    union txname tx;
140
141    tx.tx_which = 0;
142
143    if (ioctl(f, TXGETLD, (ioctl_t) & tx) == 0) {
144	if (strcmp(tx.tx_name, strPOSIX) != 0)
145	    if (ioctl(f, TXADDCD, (ioctl_t) strPOSIX) == 0) {
146		add_discipline = 1;
147		return (0);
148	    }
149	return (0);
150    }
151    else
152	return (-1);
153#endif	/* _IBMR2 */
154
155#ifndef HAVE_DISC
156# if defined(TIOCGETD) && defined(NTTYDISC)
157    if (ioctl(f, TIOCGETD, (ioctl_t) & oldisc) == 0) {
158	if (oldisc != NTTYDISC) {
159	    int     ldisc = NTTYDISC;
160
161	    if (ioctl(f, TIOCSETD, (ioctl_t) & ldisc) != 0)
162		return (-1);
163	    add_discipline = 1;
164	}
165	else
166	    oldisc = -1;
167	return (0);
168    }
169    else
170	return (-1);
171# else
172    return (0);
173# endif	/* TIOCGETD && NTTYDISC */
174#endif	/* !HAVE_DISC */
175} /* end setdisc */
176
177
178int
179/*ARGSUSED*/
180resetdisc(f)
181int f;
182{
183    if (add_discipline) {
184	add_discipline = 0;
185#if defined(OREO) || defined(IRIS4D)
186	return (ioctl(f, TCSETAF, (ioctl_t) & otermiob));
187#endif /* OREO || IRIS4D */
188
189#ifdef _IBMR2
190	return (ioctl(f, TXDELCD, (ioctl_t) strPOSIX));
191#endif /* _IBMR2 */
192
193#ifndef HAVE_DISC
194# if defined(TIOCSETD) && defined(NTTYDISC)
195	return (ioctl(f, TIOCSETD, (ioctl_t) & oldisc));
196# endif /* TIOCSETD && NTTYDISC */
197#endif /* !HAVE_DISC */
198    }
199    return (0);
200} /* end resetdisc */
201