1 /* $NetBSD: el.c,v 1.29 2002/03/18 16:00:52 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Christos Zoulas of Cornell University. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 #include "config.h" 40 #if !defined(lint) && !defined(SCCSID) 41 #if 0 42 static char sccsid[] = "@(#)el.c 8.2 (Berkeley) 1/3/94"; 43 #else 44 __RCSID("$NetBSD: el.c,v 1.29 2002/03/18 16:00:52 christos Exp $"); 45 #endif 46 #endif /* not lint && not SCCSID */ 47 48 /* 49 * el.c: EditLine interface functions 50 */ 51 #include <sys/types.h> 52 #include <sys/param.h> 53 #include <string.h> 54 #include <stdlib.h> 55 #include <stdarg.h> 56 #include "el.h" 57 58 /* el_init(): 59 * Initialize editline and set default parameters. 60 */ 61 public EditLine * 62 el_init(const char *prog, FILE *fin, FILE *fout, FILE *ferr) 63 { 64 65 EditLine *el = (EditLine *) el_malloc(sizeof(EditLine)); 66 67 if (el == NULL) 68 return (NULL); 69 70 memset(el, 0, sizeof(EditLine)); 71 72 el->el_infd = fileno(fin); 73 el->el_outfile = fout; 74 el->el_errfile = ferr; 75 el->el_prog = strdup(prog); 76 77 /* 78 * Initialize all the modules. Order is important!!! 79 */ 80 el->el_flags = 0; 81 82 if (term_init(el) == -1) { 83 free(el->el_prog); 84 el_free(el); 85 return NULL; 86 } 87 (void) key_init(el); 88 (void) map_init(el); 89 if (tty_init(el) == -1) 90 el->el_flags |= NO_TTY; 91 (void) ch_init(el); 92 (void) search_init(el); 93 (void) hist_init(el); 94 (void) prompt_init(el); 95 (void) sig_init(el); 96 (void) read_init(el); 97 98 return (el); 99 } 100 101 102 /* el_end(): 103 * Clean up. 104 */ 105 public void 106 el_end(EditLine *el) 107 { 108 109 if (el == NULL) 110 return; 111 112 el_reset(el); 113 114 term_end(el); 115 key_end(el); 116 map_end(el); 117 tty_end(el); 118 ch_end(el); 119 search_end(el); 120 hist_end(el); 121 prompt_end(el); 122 sig_end(el); 123 124 el_free((ptr_t) el->el_prog); 125 el_free((ptr_t) el); 126 } 127 128 129 /* el_reset(): 130 * Reset the tty and the parser 131 */ 132 public void 133 el_reset(EditLine *el) 134 { 135 136 tty_cookedmode(el); 137 ch_reset(el); /* XXX: Do we want that? */ 138 } 139 140 141 /* el_set(): 142 * set the editline parameters 143 */ 144 public int 145 el_set(EditLine *el, int op, ...) 146 { 147 va_list va; 148 int rv = 0; 149 150 if (el == NULL) 151 return (-1); 152 va_start(va, op); 153 154 switch (op) { 155 case EL_PROMPT: 156 case EL_RPROMPT: 157 rv = prompt_set(el, va_arg(va, el_pfunc_t), op); 158 break; 159 160 case EL_TERMINAL: 161 rv = term_set(el, va_arg(va, char *)); 162 break; 163 164 case EL_EDITOR: 165 rv = map_set_editor(el, va_arg(va, char *)); 166 break; 167 168 case EL_SIGNAL: 169 if (va_arg(va, int)) 170 el->el_flags |= HANDLE_SIGNALS; 171 else 172 el->el_flags &= ~HANDLE_SIGNALS; 173 break; 174 175 case EL_BIND: 176 case EL_TELLTC: 177 case EL_SETTC: 178 case EL_ECHOTC: 179 case EL_SETTY: 180 { 181 const char *argv[20]; 182 int i; 183 184 for (i = 1; i < 20; i++) 185 if ((argv[i] = va_arg(va, char *)) == NULL) 186 break; 187 188 switch (op) { 189 case EL_BIND: 190 argv[0] = "bind"; 191 rv = map_bind(el, i, argv); 192 break; 193 194 case EL_TELLTC: 195 argv[0] = "telltc"; 196 rv = term_telltc(el, i, argv); 197 break; 198 199 case EL_SETTC: 200 argv[0] = "settc"; 201 rv = term_settc(el, i, argv); 202 break; 203 204 case EL_ECHOTC: 205 argv[0] = "echotc"; 206 rv = term_echotc(el, i, argv); 207 break; 208 209 case EL_SETTY: 210 argv[0] = "setty"; 211 rv = tty_stty(el, i, argv); 212 break; 213 214 default: 215 rv = -1; 216 EL_ABORT((el->el_errfile, "Bad op %d\n", op)); 217 break; 218 } 219 break; 220 } 221 222 case EL_ADDFN: 223 { 224 char *name = va_arg(va, char *); 225 char *help = va_arg(va, char *); 226 el_func_t func = va_arg(va, el_func_t); 227 228 rv = map_addfunc(el, name, help, func); 229 break; 230 } 231 232 case EL_HIST: 233 { 234 hist_fun_t func = va_arg(va, hist_fun_t); 235 ptr_t ptr = va_arg(va, char *); 236 237 rv = hist_set(el, func, ptr); 238 break; 239 } 240 241 case EL_EDITMODE: 242 if (va_arg(va, int)) 243 el->el_flags &= ~EDIT_DISABLED; 244 else 245 el->el_flags |= EDIT_DISABLED; 246 rv = 0; 247 break; 248 249 case EL_GETCFN: 250 { 251 el_rfunc_t rc = va_arg(va, el_rfunc_t); 252 rv = el_read_setfn(el, rc); 253 break; 254 } 255 256 case EL_CLIENTDATA: 257 el->el_data = va_arg(va, void *); 258 break; 259 260 default: 261 rv = -1; 262 break; 263 } 264 265 va_end(va); 266 return (rv); 267 } 268 269 270 /* el_get(): 271 * retrieve the editline parameters 272 */ 273 public int 274 el_get(EditLine *el, int op, void *ret) 275 { 276 int rv; 277 278 if (el == NULL || ret == NULL) 279 return (-1); 280 switch (op) { 281 case EL_PROMPT: 282 case EL_RPROMPT: 283 rv = prompt_get(el, (el_pfunc_t *) & ret, op); 284 break; 285 286 case EL_EDITOR: 287 rv = map_get_editor(el, (const char **) &ret); 288 break; 289 290 case EL_SIGNAL: 291 *((int *) ret) = (el->el_flags & HANDLE_SIGNALS); 292 rv = 0; 293 break; 294 295 case EL_EDITMODE: 296 *((int *) ret) = (!(el->el_flags & EDIT_DISABLED)); 297 rv = 0; 298 break; 299 300 #if 0 /* XXX */ 301 case EL_TERMINAL: 302 rv = term_get(el, (const char *) &ret); 303 break; 304 305 case EL_BIND: 306 case EL_TELLTC: 307 case EL_SETTC: 308 case EL_ECHOTC: 309 case EL_SETTY: 310 { 311 char *argv[20]; 312 int i; 313 314 for (i = 1; i < 20; i++) 315 if ((argv[i] = va_arg(va, char *)) == NULL) 316 break; 317 318 switch (op) { 319 case EL_BIND: 320 argv[0] = "bind"; 321 rv = map_bind(el, i, argv); 322 break; 323 324 case EL_TELLTC: 325 argv[0] = "telltc"; 326 rv = term_telltc(el, i, argv); 327 break; 328 329 case EL_SETTC: 330 argv[0] = "settc"; 331 rv = term_settc(el, i, argv); 332 break; 333 334 case EL_ECHOTC: 335 argv[0] = "echotc"; 336 rv = term_echotc(el, i, argv); 337 break; 338 339 case EL_SETTY: 340 argv[0] = "setty"; 341 rv = tty_stty(el, i, argv); 342 break; 343 344 default: 345 rv = -1; 346 EL_ABORT((el->errfile, "Bad op %d\n", op)); 347 break; 348 } 349 break; 350 } 351 352 case EL_ADDFN: 353 { 354 char *name = va_arg(va, char *); 355 char *help = va_arg(va, char *); 356 el_func_t func = va_arg(va, el_func_t); 357 358 rv = map_addfunc(el, name, help, func); 359 break; 360 } 361 362 case EL_HIST: 363 { 364 hist_fun_t func = va_arg(va, hist_fun_t); 365 ptr_t ptr = va_arg(va, char *); 366 rv = hist_set(el, func, ptr); 367 } 368 break; 369 #endif /* XXX */ 370 371 case EL_GETCFN: 372 *((el_rfunc_t *)ret) = el_read_getfn(el); 373 rv = 0; 374 break; 375 376 case EL_CLIENTDATA: 377 *((void **)ret) = el->el_data; 378 rv = 0; 379 break; 380 381 default: 382 rv = -1; 383 } 384 385 return (rv); 386 } 387 388 389 /* el_line(): 390 * Return editing info 391 */ 392 public const LineInfo * 393 el_line(EditLine *el) 394 { 395 396 return (const LineInfo *) (void *) &el->el_line; 397 } 398 399 400 /* el_source(): 401 * Source a file 402 */ 403 public int 404 el_source(EditLine *el, const char *fname) 405 { 406 FILE *fp; 407 size_t len; 408 char *ptr; 409 410 fp = NULL; 411 if (fname == NULL) { 412 #ifdef HAVE_ISSETUGID 413 static const char elpath[] = "/.editrc"; 414 char path[MAXPATHLEN]; 415 416 if (issetugid()) 417 return (-1); 418 if ((ptr = getenv("HOME")) == NULL) 419 return (-1); 420 if (strlcpy(path, ptr, sizeof(path)) >= sizeof(path)) 421 return (-1); 422 if (strlcat(path, elpath, sizeof(path)) >= sizeof(path)) 423 return (-1); 424 fname = path; 425 #else 426 /* 427 * If issetugid() is missing, always return an error, in order 428 * to keep from inadvertently opening up the user to a security 429 * hole. 430 */ 431 return (-1); 432 #endif 433 } 434 if (fp == NULL) 435 fp = fopen(fname, "r"); 436 if (fp == NULL) 437 return (-1); 438 439 while ((ptr = fgetln(fp, &len)) != NULL) { 440 if (len > 0 && ptr[len - 1] == '\n') 441 --len; 442 ptr[len] = '\0'; 443 if (parse_line(el, ptr) == -1) { 444 (void) fclose(fp); 445 return (-1); 446 } 447 } 448 449 (void) fclose(fp); 450 return (0); 451 } 452 453 454 /* el_resize(): 455 * Called from program when terminal is resized 456 */ 457 public void 458 el_resize(EditLine *el) 459 { 460 int lins, cols; 461 sigset_t oset, nset; 462 463 (void) sigemptyset(&nset); 464 (void) sigaddset(&nset, SIGWINCH); 465 (void) sigprocmask(SIG_BLOCK, &nset, &oset); 466 467 /* get the correct window size */ 468 if (term_get_size(el, &lins, &cols)) 469 term_change_size(el, lins, cols); 470 471 (void) sigprocmask(SIG_SETMASK, &oset, NULL); 472 } 473 474 475 /* el_beep(): 476 * Called from the program to beep 477 */ 478 public void 479 el_beep(EditLine *el) 480 { 481 482 term_beep(el); 483 } 484 485 486 /* el_editmode() 487 * Set the state of EDIT_DISABLED from the `edit' command. 488 */ 489 protected int 490 /*ARGSUSED*/ 491 el_editmode(EditLine *el, int argc, const char **argv) 492 { 493 const char *how; 494 495 if (argv == NULL || argc != 2 || argv[1] == NULL) 496 return (-1); 497 498 how = argv[1]; 499 if (strcmp(how, "on") == 0) 500 el->el_flags &= ~EDIT_DISABLED; 501 else if (strcmp(how, "off") == 0) 502 el->el_flags |= EDIT_DISABLED; 503 else { 504 (void) fprintf(el->el_errfile, "edit: Bad value `%s'.\n", how); 505 return (-1); 506 } 507 return (0); 508 } 509