2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1991, 1993
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
37 static const char sccsid[] = "@(#)set.c 8.2 (Berkeley) 2/28/94";
47 #define CHK(val, dft) (val <= 0 ? dft : val)
52 * Reset the terminal mode bits to a sensible state. Very useful after
53 * a child program dies in raw mode.
58 tcgetattr(STDERR_FILENO, &mode);
60 #if defined(VDISCARD) && defined(CDISCARD)
61 mode.c_cc[VDISCARD] = CHK(mode.c_cc[VDISCARD], CDISCARD);
63 mode.c_cc[VEOF] = CHK(mode.c_cc[VEOF], CEOF);
64 mode.c_cc[VERASE] = CHK(mode.c_cc[VERASE], CERASE);
65 #if defined(VFLUSH) && defined(CFLUSH)
66 mode.c_cc[VFLUSH] = CHK(mode.c_cc[VFLUSH], CFLUSH);
68 mode.c_cc[VINTR] = CHK(mode.c_cc[VINTR], CINTR);
69 mode.c_cc[VKILL] = CHK(mode.c_cc[VKILL], CKILL);
70 #if defined(VLNEXT) && defined(CLNEXT)
71 mode.c_cc[VLNEXT] = CHK(mode.c_cc[VLNEXT], CLNEXT);
73 mode.c_cc[VQUIT] = CHK(mode.c_cc[VQUIT], CQUIT);
74 #if defined(VREPRINT) && defined(CRPRNT)
75 mode.c_cc[VREPRINT] = CHK(mode.c_cc[VREPRINT], CRPRNT);
77 mode.c_cc[VSTART] = CHK(mode.c_cc[VSTART], CSTART);
78 mode.c_cc[VSTOP] = CHK(mode.c_cc[VSTOP], CSTOP);
79 mode.c_cc[VSUSP] = CHK(mode.c_cc[VSUSP], CSUSP);
80 #if defined(VWERASE) && defined(CWERASE)
81 mode.c_cc[VWERASE] = CHK(mode.c_cc[VWERASE], CWERASE);
84 mode.c_iflag &= ~(IGNBRK | PARMRK | INPCK | ISTRIP | INLCR | IGNCR
93 mode.c_iflag |= (BRKINT | IGNPAR | ICRNL | IXON
119 | NLDLY | CRDLY | TABDLY | BSDLY | VTDLY | FFDLY
123 mode.c_oflag |= (OPOST
129 mode.c_cflag &= ~(CSIZE | CSTOPB | PARENB | PARODD | CLOCAL);
130 mode.c_cflag |= (CS8 | CREAD);
131 mode.c_lflag &= ~(ECHONL | NOFLSH | TOSTOP
140 mode.c_lflag |= (ISIG | ICANON | ECHO | ECHOE | ECHOK
149 tcsetattr(STDERR_FILENO, TCSADRAIN, &mode);
153 * Determine the erase, interrupt, and kill characters from the termcap
154 * entry and command line and update their values in 'mode'.
157 set_control_chars(void)
159 char *bp, *p, bs_char, buf[1024];
162 p = tgetstr("kb", &bp);
163 if (p == NULL || p[1] != '\0')
164 p = tgetstr("bc", &bp);
165 if (p != NULL && p[1] == '\0')
167 else if (tgetflag("bs"))
172 if (erasech == 0 && bs_char != 0 && !tgetflag("os"))
175 erasech = (bs_char != 0) ? bs_char : CTRL('h');
177 if (mode.c_cc[VERASE] == 0 || erasech != 0)
178 mode.c_cc[VERASE] = erasech ? erasech : CERASE;
180 if (mode.c_cc[VINTR] == 0 || intrchar != 0)
181 mode.c_cc[VINTR] = intrchar ? intrchar : CINTR;
183 if (mode.c_cc[VKILL] == 0 || killch != 0)
184 mode.c_cc[VKILL] = killch ? killch : CKILL;
188 * Set up various conversions in 'mode', including parity, tabs, returns,
189 * echo, and case, according to the termcap entry. If the program we're
190 * running was named with a leading upper-case character, map external
191 * uppercase to internal lowercase.
194 set_conversions(int usingupper)
196 if (tgetflag("UC") || usingupper) {
198 mode.c_iflag |= IUCLC;
199 mode.c_oflag |= OLCUC;
201 } else if (tgetflag("LC")) {
203 mode.c_iflag &= ~IUCLC;
204 mode.c_oflag &= ~OLCUC;
207 mode.c_iflag &= ~(PARMRK | INPCK);
208 mode.c_lflag |= ICANON;
209 if (tgetflag("EP")) {
210 mode.c_cflag |= PARENB;
211 mode.c_cflag &= ~PARODD;
213 if (tgetflag("OP")) {
214 mode.c_cflag |= PARENB;
215 mode.c_cflag |= PARODD;
219 mode.c_oflag |= ONLCR;
221 mode.c_iflag |= ICRNL;
222 mode.c_lflag |= ECHO;
223 mode.c_oflag |= OXTABS;
224 if (tgetflag("NL")) { /* Newline, not linefeed. */
226 mode.c_oflag &= ~ONLCR;
228 mode.c_iflag &= ~ICRNL;
230 if (tgetflag("HD")) /* Half duplex. */
231 mode.c_lflag &= ~ECHO;
232 if (tgetflag("pt")) /* Print tabs. */
233 mode.c_oflag &= ~OXTABS;
234 mode.c_lflag |= (ECHOE | ECHOK);
237 /* Output startup string. */
245 if (tgetstr("pc", &bp) != 0) /* Get/set pad character. */
249 if (oldmode.c_oflag & (TAB3 | ONLCR | OCRNL | ONLRET)) {
250 oldmode.c_oflag &= (TAB3 | ONLCR | OCRNL | ONLRET);
251 tcsetattr(STDERR_FILENO, TCSADRAIN, &oldmode);
258 if (tgetstr("rs", &bp) != 0 || tgetstr("is", &bp) != 0) {
263 if (tgetstr("rf", &bp) != 0 || tgetstr("if", &bp) != 0) {
270 (void)putc('\r', stderr);
271 (void)fflush(stderr);
272 (void)sleep(1); /* Settle the terminal. */
277 * Set the hardware tabs on the terminal, using the ct (clear all tabs),
278 * st (set one tab) and ch (horizontal cursor addressing) capabilities.
279 * This is done before if and is, so they can patch in case we blow this.
280 * Return nonzero if we set any tab stops, zero if not.
286 char *capsp, *clear_tabs;
287 char *set_column, *set_pos, *Set_tab;
292 Set_tab = tgetstr("st", &capsp);
294 if (Set_tab && (clear_tabs = tgetstr("ct", &capsp))) {
295 (void)putc('\r', stderr); /* Force to left margin. */
296 tputs(clear_tabs, 0, outc);
299 set_column = tgetstr("ch", &capsp);
300 set_pos = set_column ? NULL : tgetstr("cm", &capsp);
303 for (c = 8; c < Columns; c += 8) {
305 * Get to the right column. "OOPS" is returned by
306 * tgoto() if it can't do the job. (*snarl*)
310 tg_out = tgoto(set_column, 0, c);
311 if (*tg_out == 'O' && set_pos)
312 tg_out = tgoto(set_pos, c, Lines - 1);
314 tputs(tg_out, 1, outc);
316 (void)fprintf(stderr, "%s", " ");
318 tputs(Set_tab, 0, outc);