set.c revision 1.6
1 /* $NetBSD: set.c,v 1.6 1994/12/07 05:08:10 jtc Exp $ */ 2 3 /*- 4 * Copyright (c) 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)set.c 8.2 (Berkeley) 2/28/94"; 39 #endif 40 static char rcsid[] = "$NetBSD: set.c,v 1.6 1994/12/07 05:08:10 jtc Exp $"; 41 #endif /* not lint */ 42 43 #include <termios.h> 44 #include <unistd.h> 45 #include <stdio.h> 46 #include "extern.h" 47 48 #define CHK(val, dft) (val <= 0 ? dft : val) 49 50 int set_tabs __P((void)); 51 52 /* 53 * Reset the terminal mode bits to a sensible state. Very useful after 54 * a child program dies in raw mode. 55 */ 56 void 57 reset_mode() 58 { 59 tcgetattr(STDERR_FILENO, &mode); 60 61 #if defined(VDISCARD) && defined(CDISCARD) 62 mode.c_cc[VDISCARD] = CHK(mode.c_cc[VDISCARD], CDISCARD); 63 #endif 64 mode.c_cc[VEOF] = CHK(mode.c_cc[VEOF], CEOF); 65 mode.c_cc[VERASE] = CHK(mode.c_cc[VERASE], CERASE); 66 #if defined(VFLUSH) && defined(CFLUSH) 67 mode.c_cc[VFLUSH] = CHK(mode.c_cc[VFLUSH], CFLUSH); 68 #endif 69 mode.c_cc[VINTR] = CHK(mode.c_cc[VINTR], CINTR); 70 mode.c_cc[VKILL] = CHK(mode.c_cc[VKILL], CKILL); 71 #if defined(VLNEXT) && defined(CLNEXT) 72 mode.c_cc[VLNEXT] = CHK(mode.c_cc[VLNEXT], CLNEXT); 73 #endif 74 mode.c_cc[VQUIT] = CHK(mode.c_cc[VQUIT], CQUIT); 75 #if defined(VREPRINT) && defined(CRPRNT) 76 mode.c_cc[VREPRINT] = CHK(mode.c_cc[VREPRINT], CRPRNT); 77 #endif 78 mode.c_cc[VSTART] = CHK(mode.c_cc[VSTART], CSTART); 79 mode.c_cc[VSTOP] = CHK(mode.c_cc[VSTOP], CSTOP); 80 mode.c_cc[VSUSP] = CHK(mode.c_cc[VSUSP], CSUSP); 81 #if defined(VWERASE) && defined(CWERASE) 82 mode.c_cc[VWERASE] = CHK(mode.c_cc[VWERASE], CWERASE); 83 #endif 84 85 mode.c_iflag &= ~(IGNBRK | PARMRK | INPCK | ISTRIP | INLCR | IGNCR 86 #ifdef IUCLC 87 | IUCLC 88 #endif 89 #ifdef IXANY 90 | IXANY 91 #endif 92 | IXOFF); 93 94 mode.c_iflag |= (BRKINT | IGNPAR | ICRNL | IXON 95 #ifdef IMAXBEL 96 | IMAXBEL 97 #endif 98 ); 99 100 mode.c_oflag &= ~(0 101 #ifdef OLCUC 102 | OLCUC 103 #endif 104 #ifdef OCRNL 105 | OCRNL 106 #endif 107 #ifdef ONOCR 108 | ONOCR 109 #endif 110 #ifdef ONLRET 111 | ONLRET 112 #endif 113 #ifdef OFILL 114 | OFILL 115 #endif 116 #ifdef OFDEL 117 | OFDEL 118 #endif 119 #ifdef NLDLY 120 | NLDLY | CRDLY | TABDLY | BSDLY | VTDLY | FFDLY 121 #endif 122 ); 123 124 mode.c_oflag |= (OPOST 125 #ifdef ONLCR 126 | ONLCR 127 #endif 128 ); 129 130 mode.c_cflag &= ~(CSIZE | CSTOPB | PARENB | PARODD); 131 mode.c_cflag |= (CS8 | CREAD); 132 mode.c_lflag &= ~(ECHONL | NOFLSH | TOSTOP 133 #ifdef ECHOPTR 134 | ECHOPRT 135 #endif 136 #ifdef XCASE 137 | XCASE 138 #endif 139 ); 140 141 mode.c_lflag |= (ISIG | ICANON | ECHO | ECHOE | ECHOK 142 #ifdef ECHOCTL 143 | ECHOCTL 144 #endif 145 #ifdef ECHOKE 146 | ECHOKE 147 #endif 148 ); 149 150 tcsetattr(STDERR_FILENO, TCSADRAIN, &mode); 151 } 152 153 /* 154 * Determine the erase, interrupt, and kill characters from the termcap 155 * entry and command line and update their values in 'mode'. 156 */ 157 void 158 set_control_chars() 159 { 160 char *bp, *p, bs_char, buf[1024]; 161 162 bp = buf; 163 p = tgetstr("kb", &bp); 164 if (p == NULL || p[1] != '\0') 165 p = tgetstr("bc", &bp); 166 if (p != NULL && p[1] == '\0') 167 bs_char = p[0]; 168 else if (tgetflag("bs")) 169 bs_char = CTRL('h'); 170 else 171 bs_char = 0; 172 173 if (erasechar == 0 && !tgetflag("os") && mode.c_cc[VERASE] != CERASE) { 174 if (tgetflag("bs") || bs_char != 0) 175 erasechar = -1; 176 } 177 if (erasechar < 0) 178 erasechar = (bs_char != 0) ? bs_char : CTRL('h'); 179 180 if (mode.c_cc[VERASE] == 0 || erasechar != 0) 181 mode.c_cc[VERASE] = erasechar ? erasechar : CERASE; 182 183 if (mode.c_cc[VINTR] == 0 || intrchar != 0) 184 mode.c_cc[VINTR] = intrchar ? intrchar : CINTR; 185 186 if (mode.c_cc[VKILL] == 0 || killchar != 0) 187 mode.c_cc[VKILL] = killchar ? killchar : CKILL; 188 } 189 190 /* 191 * Set up various conversions in 'mode', including parity, tabs, returns, 192 * echo, and case, according to the termcap entry. If the program we're 193 * running was named with a leading upper-case character, map external 194 * uppercase to internal lowercase. 195 */ 196 void 197 set_conversions(usingupper) 198 int usingupper; 199 { 200 if (tgetflag("UC") || usingupper) { 201 #ifdef IUCLC 202 mode.c_iflag |= IUCLC; 203 mode.c_oflag |= OLCUC; 204 #endif 205 } else if (tgetflag("LC")) { 206 #ifdef IUCLC 207 mode.c_iflag &= ~IUCLC; 208 mode.c_oflag &= ~OLCUC; 209 #endif 210 } 211 mode.c_iflag &= ~(PARMRK | INPCK); 212 mode.c_lflag |= ICANON; 213 if (tgetflag("EP")) { 214 mode.c_cflag |= PARENB; 215 mode.c_cflag &= ~PARODD; 216 } 217 if (tgetflag("OP")) { 218 mode.c_cflag |= PARENB; 219 mode.c_cflag |= PARODD; 220 } 221 222 #ifdef ONLCR 223 mode.c_oflag |= ONLCR; 224 #endif 225 mode.c_iflag |= ICRNL; 226 mode.c_lflag |= ECHO; 227 mode.c_oflag |= OXTABS; 228 if (tgetflag("NL")) { /* Newline, not linefeed. */ 229 #ifdef ONLCR 230 mode.c_oflag &= ~ONLCR; 231 #endif 232 mode.c_iflag &= ~ICRNL; 233 } 234 if (tgetflag("HD")) /* Half duplex. */ 235 mode.c_lflag &= ~ECHO; 236 if (tgetflag("pt")) /* Print tabs. */ 237 mode.c_oflag &= ~OXTABS; 238 mode.c_lflag |= (ECHOE | ECHOK); 239 } 240 241 /* Output startup string. */ 242 void 243 set_init() 244 { 245 char *bp, buf[1024]; 246 int settle; 247 248 bp = buf; 249 if (tgetstr("pc", &bp) != 0) /* Get/set pad character. */ 250 PC = buf[0]; 251 252 #ifdef TAB3 253 if (oldmode.c_oflag & (TAB3 | ONLCR | OCRNL | ONLRET)) { 254 oldmode.c_oflag &= (TAB3 | ONLCR | OCRNL | ONLRET); 255 tcsetattr(STDERR_FILENO, TCSADRAIN, &oldmode); 256 } 257 #endif 258 settle = set_tabs(); 259 260 if (isreset) { 261 bp = buf; 262 if (tgetstr("rs", &bp) != 0 || tgetstr("is", &bp) != 0) { 263 tputs(buf, 0, outc); 264 settle = 1; 265 } 266 bp = buf; 267 if (tgetstr("rf", &bp) != 0 || tgetstr("if", &bp) != 0) { 268 cat(buf); 269 settle = 1; 270 } 271 } 272 273 if (settle) { 274 (void)putc('\r', stderr); 275 (void)fflush(stderr); 276 (void)sleep(1); /* Settle the terminal. */ 277 } 278 } 279 280 /* 281 * Set the hardware tabs on the terminal, using the ct (clear all tabs), 282 * st (set one tab) and ch (horizontal cursor addressing) capabilities. 283 * This is done before if and is, so they can patch in case we blow this. 284 * Return nonzero if we set any tab stops, zero if not. 285 */ 286 int 287 set_tabs() 288 { 289 int c; 290 char *capsp, *clear_tabs; 291 char *set_column, *set_pos, *set_tab, *tg_out; 292 char caps[1024]; 293 294 capsp = caps; 295 set_tab = tgetstr("st", &capsp); 296 297 if (set_tab && (clear_tabs = tgetstr("ct", &capsp))) { 298 (void)putc('\r', stderr); /* Force to left margin. */ 299 tputs(clear_tabs, 0, outc); 300 } 301 302 set_column = tgetstr("ch", &capsp); 303 set_pos = set_column ? NULL : tgetstr("cm", &capsp); 304 305 if (set_tab) { 306 for (c = 8; c < columns; c += 8) { 307 /* 308 * Get to the right column. "OOPS" is returned by 309 * tgoto() if it can't do the job. (*snarl*) 310 */ 311 tg_out = "OOPS"; 312 if (set_column) 313 tg_out = tgoto(set_column, 0, c); 314 if (*tg_out == 'O' && set_pos) 315 tg_out = tgoto(set_pos, c, lines - 1); 316 if (*tg_out != 'O') 317 tputs(tg_out, 1, outc); 318 else 319 (void)fprintf(stderr, "%s", " "); 320 /* Set the tab. */ 321 tputs(set_tab, 0, outc); 322 } 323 putc('\r', stderr); 324 return (1); 325 } 326 return (0); 327 } 328
Indexes created Mon Sep 22 13:09:51 GMT 2025