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15637ed4 RG |
1 | /*- |
2 | * Copyright (c) 1991 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * 3. All advertising materials mentioning features or use of this software | |
14 | * must display the following acknowledgement: | |
15 | * This product includes software developed by the University of | |
16 | * California, Berkeley and its contributors. | |
17 | * 4. Neither the name of the University nor the names of its contributors | |
18 | * may be used to endorse or promote products derived from this software | |
19 | * without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
31 | * SUCH DAMAGE. | |
32 | */ | |
33 | ||
34 | #ifndef lint | |
ca31a92e | 35 | static char sccsid[] = "@(#)set.c 5.3 (Berkeley) 12/1/92"; |
15637ed4 RG |
36 | #endif /* not lint */ |
37 | ||
38 | #include <termios.h> | |
39 | #include <unistd.h> | |
40 | #include <stdio.h> | |
41 | #include "extern.h" | |
42 | ||
43 | #define CHK(val, dft) (val <= 0 ? dft : val) | |
44 | ||
45 | int set_tabs __P((void)); | |
46 | ||
47 | /* | |
48 | * Reset the terminal mode bits to a sensible state. Very useful after | |
49 | * a child program dies in raw mode. | |
50 | */ | |
51 | void | |
52 | reset_mode() | |
53 | { | |
54 | tcgetattr(STDERR_FILENO, &mode); | |
55 | ||
56 | #if defined(VDISCARD) && defined(CDISCARD) | |
57 | mode.c_cc[VDISCARD] = CHK(mode.c_cc[VDISCARD], CDISCARD); | |
58 | #endif | |
59 | mode.c_cc[VEOF] = CHK(mode.c_cc[VEOF], CEOF); | |
60 | mode.c_cc[VERASE] = CHK(mode.c_cc[VERASE], CERASE); | |
61 | #if defined(VFLUSH) && defined(CFLUSH) | |
62 | mode.c_cc[VFLUSH] = CHK(mode.c_cc[VFLUSH], CFLUSH); | |
63 | #endif | |
64 | mode.c_cc[VINTR] = CHK(mode.c_cc[VINTR], CINTR); | |
65 | mode.c_cc[VKILL] = CHK(mode.c_cc[VKILL], CKILL); | |
66 | #if defined(VLNEXT) && defined(CLNEXT) | |
67 | mode.c_cc[VLNEXT] = CHK(mode.c_cc[VLNEXT], CLNEXT); | |
68 | #endif | |
69 | mode.c_cc[VQUIT] = CHK(mode.c_cc[VQUIT], CQUIT); | |
70 | #if defined(VREPRINT) && defined(CRPRNT) | |
71 | mode.c_cc[VREPRINT] = CHK(mode.c_cc[VREPRINT], CRPRNT); | |
72 | #endif | |
73 | mode.c_cc[VSTART] = CHK(mode.c_cc[VSTART], CSTART); | |
74 | mode.c_cc[VSTOP] = CHK(mode.c_cc[VSTOP], CSTOP); | |
75 | mode.c_cc[VSUSP] = CHK(mode.c_cc[VSUSP], CSUSP); | |
76 | #if defined(VWERASE) && defined(CWERASE) | |
77 | mode.c_cc[VWERASE] = CHK(mode.c_cc[VWERASE], CWERASE); | |
78 | #endif | |
79 | ||
80 | mode.c_iflag &= ~(IGNBRK | PARMRK | INPCK | ISTRIP | INLCR | IGNCR | |
81 | #ifdef IUCLC | |
82 | | IUCLC | |
83 | #endif | |
84 | #ifdef IXANY | |
85 | | IXANY | |
86 | #endif | |
87 | | IXOFF); | |
88 | ||
89 | mode.c_iflag |= (BRKINT | IGNPAR | ICRNL | IXON | |
90 | #ifdef IMAXBEL | |
91 | | IMAXBEL | |
92 | #endif | |
93 | ); | |
94 | ||
95 | mode.c_oflag &= ~(0 | |
96 | #ifdef OLCUC | |
97 | | OLCUC | |
98 | #endif | |
99 | #ifdef OCRNL | |
100 | | OCRNL | |
101 | #endif | |
102 | #ifdef ONOCR | |
103 | | ONOCR | |
104 | #endif | |
105 | #ifdef ONLRET | |
106 | | ONLRET | |
107 | #endif | |
108 | #ifdef OFILL | |
109 | | OFILL | |
110 | #endif | |
111 | #ifdef OFDEL | |
112 | | OFDEL | |
113 | #endif | |
114 | #ifdef NLDLY | |
115 | | NLDLY | CRDLY | TABDLY | BSDLY | VTDLY | FFDLY | |
116 | #endif | |
117 | ); | |
118 | ||
119 | mode.c_oflag |= (OPOST | |
120 | #ifdef ONLCR | |
121 | | ONLCR | |
122 | #endif | |
123 | ); | |
124 | ||
125 | mode.c_cflag &= ~(CSIZE | CSTOPB | PARENB | PARODD | CLOCAL); | |
126 | mode.c_cflag |= (CS8 | CREAD); | |
127 | mode.c_lflag &= ~(ECHONL | NOFLSH | TOSTOP | |
128 | #ifdef ECHOPTR | |
129 | | ECHOPRT | |
130 | #endif | |
131 | #ifdef XCASE | |
132 | | XCASE | |
133 | #endif | |
134 | ); | |
135 | ||
136 | mode.c_lflag |= (ISIG | ICANON | ECHO | ECHOE | ECHOK | |
137 | #ifdef ECHOCTL | |
138 | | ECHOCTL | |
139 | #endif | |
140 | #ifdef ECHOKE | |
141 | | ECHOKE | |
142 | #endif | |
143 | ); | |
144 | ||
145 | tcsetattr(STDERR_FILENO, TCSADRAIN, &mode); | |
146 | } | |
147 | ||
148 | /* | |
149 | * Determine the erase, interrupt, and kill characters from the termcap | |
150 | * entry and command line and update their values in 'mode'. | |
151 | */ | |
152 | void | |
153 | set_control_chars() | |
154 | { | |
155 | char *bp, *p, bs_char, buf[1024]; | |
156 | ||
157 | bp = buf; | |
158 | p = tgetstr("kb", &bp); | |
159 | if (p == NULL || p[1] != '\0') | |
160 | p = tgetstr("bc", &bp); | |
161 | if (p != NULL && p[1] == '\0') | |
162 | bs_char = p[0]; | |
163 | else if (tgetflag("bs")) | |
164 | bs_char = CTRL('h'); | |
165 | else | |
166 | bs_char = 0; | |
167 | ||
168 | if (erasechar == 0 && !tgetflag("os") && mode.c_cc[VERASE] != CERASE) { | |
169 | if (tgetflag("bs") || bs_char != 0) | |
170 | erasechar = -1; | |
171 | } | |
172 | if (erasechar < 0) | |
173 | erasechar = (bs_char != 0) ? bs_char : CTRL('h'); | |
174 | ||
175 | if (mode.c_cc[VERASE] == 0 || erasechar != 0) | |
176 | mode.c_cc[VERASE] = erasechar ? erasechar : CERASE; | |
177 | ||
178 | if (mode.c_cc[VINTR] == 0 || intrchar != 0) | |
179 | mode.c_cc[VINTR] = intrchar ? intrchar : CINTR; | |
180 | ||
181 | if (mode.c_cc[VKILL] == 0 || killchar != 0) | |
182 | mode.c_cc[VKILL] = killchar ? killchar : CKILL; | |
183 | } | |
184 | ||
185 | /* | |
186 | * Set up various conversions in 'mode', including parity, tabs, returns, | |
187 | * echo, and case, according to the termcap entry. If the program we're | |
188 | * running was named with a leading upper-case character, map external | |
189 | * uppercase to internal lowercase. | |
190 | */ | |
191 | void | |
192 | set_conversions(usingupper) | |
193 | int usingupper; | |
194 | { | |
195 | if (tgetflag("UC") || usingupper) { | |
196 | #ifdef IUCLC | |
197 | mode.c_iflag |= IUCLC; | |
198 | mode.c_oflag |= OLCUC; | |
199 | #endif | |
200 | } else if (tgetflag("LC")) { | |
201 | #ifdef IUCLC | |
202 | mode.c_iflag &= ~IUCLC; | |
203 | mode.c_oflag &= ~OLCUC; | |
204 | #endif | |
205 | } | |
206 | mode.c_iflag &= ~(PARMRK | INPCK); | |
207 | mode.c_lflag |= ICANON; | |
208 | if (tgetflag("EP")) { | |
209 | mode.c_cflag |= PARENB; | |
210 | mode.c_cflag &= ~PARODD; | |
211 | } | |
212 | if (tgetflag("OP")) { | |
213 | mode.c_cflag |= PARENB; | |
214 | mode.c_cflag |= PARODD; | |
215 | } | |
216 | ||
217 | #ifdef ONLCR | |
218 | mode.c_oflag |= ONLCR; | |
219 | #endif | |
220 | mode.c_iflag |= ICRNL; | |
221 | mode.c_lflag |= ECHO; | |
222 | mode.c_oflag |= OXTABS; | |
223 | if (tgetflag("NL")) { /* Newline, not linefeed. */ | |
224 | #ifdef ONLCR | |
225 | mode.c_oflag &= ~ONLCR; | |
226 | #endif | |
227 | mode.c_iflag &= ~ICRNL; | |
228 | } | |
229 | if (tgetflag("HD")) /* Half duplex. */ | |
230 | mode.c_lflag &= ~ECHO; | |
231 | if (tgetflag("pt")) /* Print tabs. */ | |
232 | mode.c_oflag &= ~OXTABS; | |
233 | mode.c_lflag |= (ECHOE | ECHOK); | |
234 | } | |
235 | ||
236 | /* Output startup string. */ | |
237 | void | |
238 | set_init() | |
239 | { | |
240 | char *bp, buf[1024]; | |
241 | int settle; | |
242 | ||
243 | bp = buf; | |
244 | if (tgetstr("pc", &bp) != 0) /* Get/set pad character. */ | |
245 | PC = buf[0]; | |
246 | ||
247 | #ifdef TAB3 | |
248 | if (oldmode.c_oflag & (TAB3 | ONLCR | OCRNL | ONLRET)) { | |
249 | oldmode.c_oflag &= (TAB3 | ONLCR | OCRNL | ONLRET); | |
250 | tcsetattr(STDERR_FILENO, TCSADRAIN, &oldmode); | |
251 | } | |
252 | #endif | |
253 | settle = set_tabs(); | |
254 | ||
255 | if (isreset) { | |
256 | if (tgetstr("rs", &bp) != 0 || tgetstr("is", &bp) != 0) { | |
257 | tputs(buf, 0, outc); | |
258 | settle = 1; | |
259 | } | |
260 | if (tgetstr("rf", &bp) != 0 || tgetstr("if", &bp) != 0) { | |
261 | cat(buf); | |
262 | settle = 1; | |
263 | } | |
264 | } | |
265 | ||
266 | if (settle) { | |
267 | (void)putc('\r', stderr); | |
268 | (void)fflush(stderr); | |
269 | (void)sleep(1); /* Settle the terminal. */ | |
270 | } | |
271 | } | |
272 | ||
273 | /* | |
274 | * Set the hardware tabs on the terminal, using the ct (clear all tabs), | |
275 | * st (set one tab) and ch (horizontal cursor addressing) capabilities. | |
276 | * This is done before if and is, so they can patch in case we blow this. | |
277 | * Return nonzero if we set any tab stops, zero if not. | |
278 | */ | |
279 | int | |
280 | set_tabs() | |
281 | { | |
282 | int c; | |
283 | char *capsp, *clear_tabs; | |
284 | char *set_column, *set_pos, *set_tab, *tg_out; | |
285 | char caps[1024]; | |
286 | ||
287 | capsp = caps; | |
288 | set_tab = tgetstr("st", &capsp); | |
289 | ||
290 | if (set_tab && (clear_tabs = tgetstr("ct", &capsp))) { | |
291 | (void)putc('\r', stderr); /* Force to left margin. */ | |
292 | tputs(clear_tabs, 0, outc); | |
293 | } | |
294 | ||
295 | set_column = tgetstr("ch", &capsp); | |
296 | set_pos = set_column ? NULL : tgetstr("cm", &capsp); | |
297 | ||
298 | if (set_tab) { | |
299 | for (c = 8; c < columns; c += 8) { | |
300 | /* | |
301 | * Get to the right column. "OOPS" is returned by | |
302 | * tgoto() if it can't do the job. (*snarl*) | |
303 | */ | |
304 | tg_out = "OOPS"; | |
305 | if (set_column) | |
306 | tg_out = tgoto(set_column, 0, c); | |
307 | if (*tg_out == 'O' && set_pos) | |
308 | tg_out = tgoto(set_pos, c, lines - 1); | |
309 | if (*tg_out != 'O') | |
310 | tputs(tg_out, 1, outc); | |
311 | else | |
312 | (void)fprintf(stderr, "%s", " "); | |
313 | /* Set the tab. */ | |
314 | tputs(set_tab, 0, outc); | |
315 | } | |
316 | putc('\r', stderr); | |
317 | return (1); | |
318 | } | |
319 | return (0); | |
320 | } |