lib_ttyflags.c revision 178866 
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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 1.16 2008/05/03 22:39:03 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->Filedes, _nc_trace_ttymode(buf)));
69    }
70    return (result);
71}
72
73NCURSES_EXPORT(int)
74_nc_set_tty_mode(TTY * buf)
75{
76    int result = OK;
77
78    if (buf == 0) {
79	result = ERR;
80    } else {
81	if (cur_term == 0) {
82	    result = ERR;
83	} else {
84	    for (;;) {
85		if (SET_TTY(cur_term->Filedes, buf) != 0) {
86		    if (errno == EINTR)
87			continue;
88		    if ((errno == ENOTTY) && (SP != 0))
89			SP->_notty = TRUE;
90		    result = ERR;
91		}
92		break;
93	    }
94	}
95	TR(TRACE_BITS, ("_nc_set_tty_mode(%d): %s",
96			cur_term->Filedes, _nc_trace_ttymode(buf)));
97    }
98    return (result);
99}
100
101NCURSES_EXPORT(int)
102def_shell_mode(void)
103{
104    T((T_CALLED("def_shell_mode()")));
105
106    /*
107     * If XTABS was on, remove the tab and backtab capabilities.
108     */
109
110    if (_nc_get_tty_mode(&cur_term->Ottyb) != OK)
111	returnCode(ERR);
112#ifdef TERMIOS
113    if (cur_term->Ottyb.c_oflag & OFLAGS_TABS)
114	tab = back_tab = NULL;
115#else
116    if (cur_term->Ottyb.sg_flags & XTABS)
117	tab = back_tab = NULL;
118#endif
119    returnCode(OK);
120}
121
122NCURSES_EXPORT(int)
123def_prog_mode(void)
124{
125    T((T_CALLED("def_prog_mode()")));
126
127    /*
128     * Turn off the XTABS bit in the tty structure if it was on.
129     */
130
131    if (_nc_get_tty_mode(&cur_term->Nttyb) != OK)
132	returnCode(ERR);
133#ifdef TERMIOS
134    cur_term->Nttyb.c_oflag &= ~OFLAGS_TABS;
135#else
136    cur_term->Nttyb.sg_flags &= ~XTABS;
137#endif
138    returnCode(OK);
139}
140
141NCURSES_EXPORT(int)
142reset_prog_mode(void)
143{
144    T((T_CALLED("reset_prog_mode()")));
145
146    if (cur_term != 0) {
147	if (_nc_set_tty_mode(&cur_term->Nttyb) == OK) {
148	    if (SP) {
149		if (SP->_keypad_on)
150		    _nc_keypad(SP, TRUE);
151		NC_BUFFERED(TRUE);
152	    }
153	    returnCode(OK);
154	}
155    }
156    returnCode(ERR);
157}
158
159NCURSES_EXPORT(int)
160reset_shell_mode(void)
161{
162    T((T_CALLED("reset_shell_mode()")));
163
164    if (cur_term != 0) {
165	if (SP) {
166	    _nc_keypad(SP, FALSE);
167	    _nc_flush();
168	    NC_BUFFERED(FALSE);
169	}
170	returnCode(_nc_set_tty_mode(&cur_term->Ottyb));
171    }
172    returnCode(ERR);
173}
174
175static TTY *
176saved_tty(void)
177{
178    TTY *result = 0;
179
180    if (SP != 0) {
181	result = &(SP->_saved_tty);
182    } else {
183	if (_nc_prescreen.saved_tty == 0) {
184	    _nc_prescreen.saved_tty = typeCalloc(TTY, 1);
185	}
186	result = _nc_prescreen.saved_tty;
187    }
188    return result;
189}
190
191/*
192**	savetty()  and  resetty()
193**
194*/
195
196NCURSES_EXPORT(int)
197savetty(void)
198{
199    T((T_CALLED("savetty()")));
200
201    returnCode(_nc_get_tty_mode(saved_tty()));
202}
203
204NCURSES_EXPORT(int)
205resetty(void)
206{
207    T((T_CALLED("resetty()")));
208
209    returnCode(_nc_set_tty_mode(saved_tty()));
210}
211