hack.tty.c revision 1.11
1 /* $NetBSD: hack.tty.c,v 1.11 2003/04/02 18:36:41 jsm Exp $ */ 2 3 /*- 4 * Copyright (c) 1988, 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 #include <sys/cdefs.h> 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)hack.tty.c 8.1 (Berkeley) 5/31/93"; 40 #else 41 __RCSID("$NetBSD: hack.tty.c,v 1.11 2003/04/02 18:36:41 jsm Exp $"); 42 #endif 43 #endif /* not lint */ 44 45 /* 46 * Copyright (c) 1985, Stichting Centrum voor Wiskunde en Informatica, 47 * Amsterdam 48 * All rights reserved. 49 * 50 * Redistribution and use in source and binary forms, with or without 51 * modification, are permitted provided that the following conditions are 52 * met: 53 * 54 * - Redistributions of source code must retain the above copyright notice, 55 * this list of conditions and the following disclaimer. 56 * 57 * - Redistributions in binary form must reproduce the above copyright 58 * notice, this list of conditions and the following disclaimer in the 59 * documentation and/or other materials provided with the distribution. 60 * 61 * - Neither the name of the Stichting Centrum voor Wiskunde en 62 * Informatica, nor the names of its contributors may be used to endorse or 63 * promote products derived from this software without specific prior 64 * written permission. 65 * 66 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 67 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 68 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 69 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER 70 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 71 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 72 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 73 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 74 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 75 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 76 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 77 */ 78 79 /* 80 * Copyright (c) 1982 Jay Fenlason <hack (at) gnu.org> 81 * All rights reserved. 82 * 83 * Redistribution and use in source and binary forms, with or without 84 * modification, are permitted provided that the following conditions 85 * are met: 86 * 1. Redistributions of source code must retain the above copyright 87 * notice, this list of conditions and the following disclaimer. 88 * 2. Redistributions in binary form must reproduce the above copyright 89 * notice, this list of conditions and the following disclaimer in the 90 * documentation and/or other materials provided with the distribution. 91 * 3. The name of the author may not be used to endorse or promote products 92 * derived from this software without specific prior written permission. 93 * 94 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 95 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 96 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 97 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 98 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 99 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 100 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 101 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 102 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 103 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 104 */ 105 106 /* hack.tty.c - version 1.0.3 */ 107 /* 108 * With thanks to the people who sent code for SYSV - hpscdi!jon, 109 * arnold@ucsf-cgl, wcs@bo95b, cbcephus!pds and others. 110 */ 111 112 #include <termios.h> 113 #include <termcap.h> 114 #include "hack.h" 115 #include "extern.h" 116 117 /* 118 * Some systems may have getchar() return EOF for various reasons, and 119 * we should not quit before seeing at least NR_OF_EOFS consecutive EOFs. 120 */ 121 #ifndef BSD 122 #define NR_OF_EOFS 20 123 #endif /* BSD */ 124 125 static char erase_char, kill_char; 126 static boolean settty_needed = FALSE; 127 struct termios inittyb, curttyb; 128 129 /* 130 * Get initial state of terminal, set ospeed (for termcap routines) 131 * and switch off tab expansion if necessary. 132 * Called by startup() in termcap.c and after returning from ! or ^Z 133 */ 134 void 135 gettty() 136 { 137 if (tcgetattr(0, &inittyb) < 0) 138 perror("Hack (gettty)"); 139 curttyb = inittyb; 140 ospeed = cfgetospeed(&inittyb); 141 erase_char = inittyb.c_cc[VERASE]; 142 kill_char = inittyb.c_cc[VKILL]; 143 getioctls(); 144 145 /* do not expand tabs - they might be needed inside a cm sequence */ 146 if (curttyb.c_oflag & OXTABS) { 147 curttyb.c_oflag &= ~OXTABS; 148 setctty(); 149 } 150 settty_needed = TRUE; 151 } 152 153 /* reset terminal to original state */ 154 void 155 settty(s) 156 const char *s; 157 { 158 clear_screen(); 159 end_screen(); 160 if (s) 161 printf("%s", s); 162 (void) fflush(stdout); 163 if (tcsetattr(0, TCSADRAIN, &inittyb) < 0) 164 perror("Hack (settty)"); 165 flags.echo = (inittyb.c_lflag & ECHO) ? ON : OFF; 166 flags.cbreak = (inittyb.c_lflag & ICANON) ? OFF : ON; 167 setioctls(); 168 } 169 170 void 171 setctty() 172 { 173 if (tcsetattr(0, TCSADRAIN, &curttyb) < 0) 174 perror("Hack (setctty)"); 175 } 176 177 178 void 179 setftty() 180 { 181 int change = 0; 182 flags.cbreak = ON; 183 flags.echo = OFF; 184 /* Should use (ECHO|CRMOD) here instead of ECHO */ 185 if (curttyb.c_lflag & ECHO) { 186 curttyb.c_lflag &= ~ECHO; 187 change++; 188 } 189 if (curttyb.c_lflag & ICANON) { 190 curttyb.c_lflag &= ~ICANON; 191 /* be satisfied with one character; no timeout */ 192 curttyb.c_cc[VMIN] = 1; 193 curttyb.c_cc[VTIME] = 0; 194 change++; 195 } 196 if (change) { 197 setctty(); 198 } 199 start_screen(); 200 } 201 202 203 /* fatal error */ 204 /* VARARGS1 */ 205 void 206 error(const char *fmt, ...) 207 { 208 va_list ap; 209 210 va_start(ap, fmt); 211 if (settty_needed) 212 settty((char *) 0); 213 vprintf(fmt, ap); 214 va_end(ap); 215 putchar('\n'); 216 exit(1); 217 } 218 219 /* 220 * Read a line closed with '\n' into the array char bufp[BUFSZ]. 221 * (The '\n' is not stored. The string is closed with a '\0'.) 222 * Reading can be interrupted by an escape ('\033') - now the 223 * resulting string is "\033". 224 */ 225 void 226 getlin(bufp) 227 char *bufp; 228 { 229 char *obufp = bufp; 230 int c; 231 232 flags.toplin = 2; /* nonempty, no --More-- required */ 233 for (;;) { 234 (void) fflush(stdout); 235 if ((c = getchar()) == EOF) { 236 *bufp = 0; 237 return; 238 } 239 if (c == '\033') { 240 *obufp = c; 241 obufp[1] = 0; 242 return; 243 } 244 if (c == erase_char || c == '\b') { 245 if (bufp != obufp) { 246 bufp--; 247 putstr("\b \b"); /* putsym converts \b */ 248 } else 249 bell(); 250 } else if (c == '\n') { 251 *bufp = 0; 252 return; 253 } else if (' ' <= c && c < '\177') { 254 /* 255 * avoid isprint() - some people don't have it ' ' is 256 * not always a printing char 257 */ 258 *bufp = c; 259 bufp[1] = 0; 260 putstr(bufp); 261 if (bufp - obufp < BUFSZ - 1 && bufp - obufp < COLNO) 262 bufp++; 263 } else if (c == kill_char || c == '\177') { /* Robert Viduya */ 264 /* this test last - @ might be the kill_char */ 265 while (bufp != obufp) { 266 bufp--; 267 putstr("\b \b"); 268 } 269 } else 270 bell(); 271 } 272 } 273 274 void 275 getret() 276 { 277 cgetret(""); 278 } 279 280 void 281 cgetret(s) 282 const char *s; 283 { 284 putsym('\n'); 285 if (flags.standout) 286 standoutbeg(); 287 putstr("Hit "); 288 putstr(flags.cbreak ? "space" : "return"); 289 putstr(" to continue: "); 290 if (flags.standout) 291 standoutend(); 292 xwaitforspace(s); 293 } 294 295 char morc; /* tell the outside world what char he used */ 296 297 void 298 xwaitforspace(s) 299 const char *s; /* chars allowed besides space or return */ 300 { 301 int c; 302 303 morc = 0; 304 305 while ((c = readchar()) != '\n') { 306 if (flags.cbreak) { 307 if (c == ' ') 308 break; 309 if (s && strchr(s, c)) { 310 morc = c; 311 break; 312 } 313 bell(); 314 } 315 } 316 } 317 318 char * 319 parse() 320 { 321 static char inputline[COLNO]; 322 int foo; 323 324 flags.move = 1; 325 if (!Invisible) 326 curs_on_u(); 327 else 328 home(); 329 while ((foo = readchar()) >= '0' && foo <= '9') 330 multi = 10 * multi + foo - '0'; 331 if (multi) { 332 multi--; 333 save_cm = inputline; 334 } 335 inputline[0] = foo; 336 inputline[1] = 0; 337 if (foo == 'f' || foo == 'F') { 338 inputline[1] = getchar(); 339 #ifdef QUEST 340 if (inputline[1] == foo) 341 inputline[2] = getchar(); 342 else 343 #endif /* QUEST */ 344 inputline[2] = 0; 345 } 346 if (foo == 'm' || foo == 'M') { 347 inputline[1] = getchar(); 348 inputline[2] = 0; 349 } 350 clrlin(); 351 return (inputline); 352 } 353 354 char 355 readchar() 356 { 357 int sym; 358 359 (void) fflush(stdout); 360 if ((sym = getchar()) == EOF) 361 #ifdef NR_OF_EOFS 362 { /* 363 * Some SYSV systems seem to return EOFs for various reasons 364 * (?like when one hits break or for interrupted systemcalls?), 365 * and we must see several before we quit. 366 */ 367 int cnt = NR_OF_EOFS; 368 while (cnt--) { 369 clearerr(stdin); /* omit if clearerr is 370 * undefined */ 371 if ((sym = getchar()) != EOF) 372 goto noteof; 373 } 374 end_of_input(); 375 noteof: ; 376 } 377 #else 378 end_of_input(); 379 #endif /* NR_OF_EOFS */ 380 if (flags.toplin == 1) 381 flags.toplin = 2; 382 return ((char) sym); 383 } 384 385 void 386 end_of_input() 387 { 388 settty("End of input?\n"); 389 clearlocks(); 390 exit(0); 391 } 392
Indexes created Thu Sep 25 16:09:42 GMT 2025