1/****************************************************************************
2 * Copyright (c) 1998-2007,2008 Free Software Foundation, Inc.              *
3 *                                                                          *
4 * Permission is hereby granted, free of charge, to any person obtaining a  *
5 * copy of this software and associated documentation files (the            *
6 * "Software"), to deal in the Software without restriction, including      *
7 * without limitation the rights to use, copy, modify, merge, publish,      *
8 * distribute, distribute with modifications, sublicense, and/or sell       *
9 * copies of the Software, and to permit persons to whom the Software is    *
10 * furnished to do so, subject to the following conditions:                 *
11 *                                                                          *
12 * The above copyright notice and this permission notice shall be included  *
13 * in all copies or substantial portions of the Software.                   *
14 *                                                                          *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
22 *                                                                          *
23 * Except as contained in this notice, the name(s) of the above copyright   *
24 * holders shall not be used in advertising or otherwise to promote the     *
25 * sale, use or other dealings in this Software without prior written       *
26 * authorization.                                                           *
27 ****************************************************************************/
28
29/*
30 *		def_prog_mode()
31 *		def_shell_mode()
32 *		reset_prog_mode()
33 *		reset_shell_mode()
34 *		savetty()
35 *		resetty()
36 */
37
38#include <curses.priv.h>
39#include <term.h>		/* cur_term */
40
41MODULE_ID("$Id: lib_ttyflags.c,v 1.18 2008/08/03 22:10:44 tom Exp $")
42
43NCURSES_EXPORT(int)
44_nc_get_tty_mode(TTY * buf)
45{
46    int result = OK;
47
48    if (buf == 0) {
49	result = ERR;
50    } else {
51	if (cur_term == 0) {
52	    result = ERR;
53	} else {
54	    for (;;) {
55		if (GET_TTY(cur_term->Filedes, buf) != 0) {
56		    if (errno == EINTR)
57			continue;
58		    result = ERR;
59		}
60		break;
61	    }
62	}
63
64	if (result == ERR)
65	    memset(buf, 0, sizeof(*buf));
66
67	TR(TRACE_BITS, ("_nc_get_tty_mode(%d): %s",
68			cur_term ? cur_term->Filedes : -1,
69			_nc_trace_ttymode(buf)));
70    }
71    return (result);
72}
73
74NCURSES_EXPORT(int)
75_nc_set_tty_mode(TTY * buf)
76{
77    int result = OK;
78
79    if (buf == 0) {
80	result = ERR;
81    } else {
82	if (cur_term == 0) {
83	    result = ERR;
84	} else {
85	    for (;;) {
86		if (SET_TTY(cur_term->Filedes, buf) != 0) {
87		    if (errno == EINTR)
88			continue;
89		    if ((errno == ENOTTY) && (SP != 0))
90			SP->_notty = TRUE;
91		    result = ERR;
92		}
93		break;
94	    }
95	}
96	TR(TRACE_BITS, ("_nc_set_tty_mode(%d): %s",
97			cur_term ? cur_term->Filedes : -1,
98			_nc_trace_ttymode(buf)));
99    }
100    return (result);
101}
102
103NCURSES_EXPORT(int)
104def_shell_mode(void)
105{
106    int rc = ERR;
107
108    T((T_CALLED("def_shell_mode()")));
109
110    if (cur_term != 0) {
111	/*
112	 * If XTABS was on, remove the tab and backtab capabilities.
113	 */
114	if (_nc_get_tty_mode(&cur_term->Ottyb) == OK) {
115#ifdef TERMIOS
116	    if (cur_term->Ottyb.c_oflag & OFLAGS_TABS)
117		tab = back_tab = NULL;
118#else
119	    if (cur_term->Ottyb.sg_flags & XTABS)
120		tab = back_tab = NULL;
121#endif
122	    rc = OK;
123	}
124    }
125    returnCode(rc);
126}
127
128NCURSES_EXPORT(int)
129def_prog_mode(void)
130{
131    int rc = ERR;
132
133    T((T_CALLED("def_prog_mode()")));
134
135    if (cur_term != 0) {
136	/*
137	 * Turn off the XTABS bit in the tty structure if it was on.
138	 */
139	if (_nc_get_tty_mode(&cur_term->Nttyb) == OK) {
140#ifdef TERMIOS
141	    cur_term->Nttyb.c_oflag &= ~OFLAGS_TABS;
142#else
143	    cur_term->Nttyb.sg_flags &= ~XTABS;
144#endif
145	    rc = OK;
146	}
147    }
148    returnCode(rc);
149}
150
151NCURSES_EXPORT(int)
152reset_prog_mode(void)
153{
154    T((T_CALLED("reset_prog_mode()")));
155
156    if (cur_term != 0) {
157	if (_nc_set_tty_mode(&cur_term->Nttyb) == OK) {
158	    if (SP) {
159		if (SP->_keypad_on)
160		    _nc_keypad(SP, TRUE);
161		NC_BUFFERED(TRUE);
162	    }
163	    returnCode(OK);
164	}
165    }
166    returnCode(ERR);
167}
168
169NCURSES_EXPORT(int)
170reset_shell_mode(void)
171{
172    T((T_CALLED("reset_shell_mode()")));
173
174    if (cur_term != 0) {
175	if (SP) {
176	    _nc_keypad(SP, FALSE);
177	    _nc_flush();
178	    NC_BUFFERED(FALSE);
179	}
180	returnCode(_nc_set_tty_mode(&cur_term->Ottyb));
181    }
182    returnCode(ERR);
183}
184
185static TTY *
186saved_tty(void)
187{
188    TTY *result = 0;
189
190    if (SP != 0) {
191	result = &(SP->_saved_tty);
192    } else {
193	if (_nc_prescreen.saved_tty == 0) {
194	    _nc_prescreen.saved_tty = typeCalloc(TTY, 1);
195	}
196	result = _nc_prescreen.saved_tty;
197    }
198    return result;
199}
200
201/*
202**	savetty()  and  resetty()
203**
204*/
205
206NCURSES_EXPORT(int)
207savetty(void)
208{
209    T((T_CALLED("savetty()")));
210
211    returnCode(_nc_get_tty_mode(saved_tty()));
212}
213
214NCURSES_EXPORT(int)
215resetty(void)
216{
217    T((T_CALLED("resetty()")));
218
219    returnCode(_nc_set_tty_mode(saved_tty()));
220}
221