el.c revision 1.86
1 /* $NetBSD: el.c,v 1.86 2016/04/11 00:22:48 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. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include "config.h" 36 #if !defined(lint) && !defined(SCCSID) 37 #if 0 38 static char sccsid[] = "@(#)el.c 8.2 (Berkeley) 1/3/94"; 39 #else 40 __RCSID("$NetBSD: el.c,v 1.86 2016/04/11 00:22:48 christos Exp $"); 41 #endif 42 #endif /* not lint && not SCCSID */ 43 44 /* 45 * el.c: EditLine interface functions 46 */ 47 #include <sys/types.h> 48 #include <sys/param.h> 49 #include <ctype.h> 50 #include <langinfo.h> 51 #include <locale.h> 52 #include <stdarg.h> 53 #include <stdlib.h> 54 #include <string.h> 55 56 #include "el.h" 57 #include "parse.h" 58 59 /* el_init(): 60 * Initialize editline and set default parameters. 61 */ 62 public EditLine * 63 el_init(const char *prog, FILE *fin, FILE *fout, FILE *ferr) 64 { 65 return el_init_fd(prog, fin, fout, ferr, fileno(fin), fileno(fout), 66 fileno(ferr)); 67 } 68 69 public EditLine * 70 el_init_fd(const char *prog, FILE *fin, FILE *fout, FILE *ferr, 71 int fdin, int fdout, int fderr) 72 { 73 EditLine *el = el_malloc(sizeof(*el)); 74 75 if (el == NULL) 76 return NULL; 77 78 memset(el, 0, sizeof(EditLine)); 79 80 el->el_infile = fin; 81 el->el_outfile = fout; 82 el->el_errfile = ferr; 83 84 el->el_infd = fdin; 85 el->el_outfd = fdout; 86 el->el_errfd = fderr; 87 88 el->el_prog = wcsdup(ct_decode_string(prog, &el->el_scratch)); 89 if (el->el_prog == NULL) { 90 el_free(el); 91 return NULL; 92 } 93 94 /* 95 * Initialize all the modules. Order is important!!! 96 */ 97 el->el_flags = 0; 98 if (setlocale(LC_CTYPE, NULL) != NULL){ 99 if (strcmp(nl_langinfo(CODESET), "UTF-8") == 0) 100 el->el_flags |= CHARSET_IS_UTF8; 101 } 102 103 if (terminal_init(el) == -1) { 104 el_free(el->el_prog); 105 el_free(el); 106 return NULL; 107 } 108 (void) keymacro_init(el); 109 (void) map_init(el); 110 if (tty_init(el) == -1) 111 el->el_flags |= NO_TTY; 112 (void) ch_init(el); 113 (void) search_init(el); 114 (void) hist_init(el); 115 (void) prompt_init(el); 116 (void) sig_init(el); 117 (void) read_init(el); 118 119 return el; 120 } 121 122 123 /* el_end(): 124 * Clean up. 125 */ 126 public void 127 el_end(EditLine *el) 128 { 129 130 if (el == NULL) 131 return; 132 133 el_reset(el); 134 135 terminal_end(el); 136 keymacro_end(el); 137 map_end(el); 138 if (!(el->el_flags & NO_TTY)) 139 tty_end(el); 140 ch_end(el); 141 search_end(el); 142 hist_end(el); 143 prompt_end(el); 144 sig_end(el); 145 146 el_free(el->el_prog); 147 el_free(el->el_scratch.cbuff); 148 el_free(el->el_scratch.wbuff); 149 el_free(el->el_lgcyconv.cbuff); 150 el_free(el->el_lgcyconv.wbuff); 151 el_free(el); 152 } 153 154 155 /* el_reset(): 156 * Reset the tty and the parser 157 */ 158 public void 159 el_reset(EditLine *el) 160 { 161 162 tty_cookedmode(el); 163 ch_reset(el, 0); /* XXX: Do we want that? */ 164 } 165 166 167 /* el_set(): 168 * set the editline parameters 169 */ 170 public int 171 el_wset(EditLine *el, int op, ...) 172 { 173 va_list ap; 174 int rv = 0; 175 176 if (el == NULL) 177 return -1; 178 va_start(ap, op); 179 180 switch (op) { 181 case EL_PROMPT: 182 case EL_RPROMPT: { 183 el_pfunc_t p = va_arg(ap, el_pfunc_t); 184 185 rv = prompt_set(el, p, 0, op, 1); 186 break; 187 } 188 189 case EL_RESIZE: { 190 el_zfunc_t p = va_arg(ap, el_zfunc_t); 191 void *arg = va_arg(ap, void *); 192 rv = ch_resizefun(el, p, arg); 193 break; 194 } 195 196 case EL_ALIAS_TEXT: { 197 el_afunc_t p = va_arg(ap, el_afunc_t); 198 void *arg = va_arg(ap, void *); 199 rv = ch_aliasfun(el, p, arg); 200 break; 201 } 202 203 case EL_PROMPT_ESC: 204 case EL_RPROMPT_ESC: { 205 el_pfunc_t p = va_arg(ap, el_pfunc_t); 206 int c = va_arg(ap, int); 207 208 rv = prompt_set(el, p, (Char)c, op, 1); 209 break; 210 } 211 212 case EL_TERMINAL: 213 rv = terminal_set(el, va_arg(ap, char *)); 214 break; 215 216 case EL_EDITOR: 217 rv = map_set_editor(el, va_arg(ap, Char *)); 218 break; 219 220 case EL_SIGNAL: 221 if (va_arg(ap, int)) 222 el->el_flags |= HANDLE_SIGNALS; 223 else 224 el->el_flags &= ~HANDLE_SIGNALS; 225 break; 226 227 case EL_BIND: 228 case EL_TELLTC: 229 case EL_SETTC: 230 case EL_ECHOTC: 231 case EL_SETTY: 232 { 233 const Char *argv[20]; 234 int i; 235 236 for (i = 1; i < (int)__arraycount(argv); i++) 237 if ((argv[i] = va_arg(ap, Char *)) == NULL) 238 break; 239 240 switch (op) { 241 case EL_BIND: 242 argv[0] = L"bind"; 243 rv = map_bind(el, i, argv); 244 break; 245 246 case EL_TELLTC: 247 argv[0] = L"telltc"; 248 rv = terminal_telltc(el, i, argv); 249 break; 250 251 case EL_SETTC: 252 argv[0] = L"settc"; 253 rv = terminal_settc(el, i, argv); 254 break; 255 256 case EL_ECHOTC: 257 argv[0] = L"echotc"; 258 rv = terminal_echotc(el, i, argv); 259 break; 260 261 case EL_SETTY: 262 argv[0] = L"setty"; 263 rv = tty_stty(el, i, argv); 264 break; 265 266 default: 267 rv = -1; 268 EL_ABORT((el->el_errfile, "Bad op %d\n", op)); 269 break; 270 } 271 break; 272 } 273 274 case EL_ADDFN: 275 { 276 Char *name = va_arg(ap, Char *); 277 Char *help = va_arg(ap, Char *); 278 el_func_t func = va_arg(ap, el_func_t); 279 280 rv = map_addfunc(el, name, help, func); 281 break; 282 } 283 284 case EL_HIST: 285 { 286 hist_fun_t func = va_arg(ap, hist_fun_t); 287 void *ptr = va_arg(ap, void *); 288 289 rv = hist_set(el, func, ptr); 290 if (!(el->el_flags & CHARSET_IS_UTF8)) 291 el->el_flags &= ~NARROW_HISTORY; 292 break; 293 } 294 295 case EL_EDITMODE: 296 if (va_arg(ap, int)) 297 el->el_flags &= ~EDIT_DISABLED; 298 else 299 el->el_flags |= EDIT_DISABLED; 300 rv = 0; 301 break; 302 303 case EL_GETCFN: 304 { 305 el_rfunc_t rc = va_arg(ap, el_rfunc_t); 306 rv = el_read_setfn(el, rc); 307 break; 308 } 309 310 case EL_CLIENTDATA: 311 el->el_data = va_arg(ap, void *); 312 break; 313 314 case EL_UNBUFFERED: 315 rv = va_arg(ap, int); 316 if (rv && !(el->el_flags & UNBUFFERED)) { 317 el->el_flags |= UNBUFFERED; 318 read_prepare(el); 319 } else if (!rv && (el->el_flags & UNBUFFERED)) { 320 el->el_flags &= ~UNBUFFERED; 321 read_finish(el); 322 } 323 rv = 0; 324 break; 325 326 case EL_PREP_TERM: 327 rv = va_arg(ap, int); 328 if (rv) 329 (void) tty_rawmode(el); 330 else 331 (void) tty_cookedmode(el); 332 rv = 0; 333 break; 334 335 case EL_SETFP: 336 { 337 FILE *fp; 338 int what; 339 340 what = va_arg(ap, int); 341 fp = va_arg(ap, FILE *); 342 343 rv = 0; 344 switch (what) { 345 case 0: 346 el->el_infile = fp; 347 el->el_infd = fileno(fp); 348 break; 349 case 1: 350 el->el_outfile = fp; 351 el->el_outfd = fileno(fp); 352 break; 353 case 2: 354 el->el_errfile = fp; 355 el->el_errfd = fileno(fp); 356 break; 357 default: 358 rv = -1; 359 break; 360 } 361 break; 362 } 363 364 case EL_REFRESH: 365 re_clear_display(el); 366 re_refresh(el); 367 terminal__flush(el); 368 break; 369 370 default: 371 rv = -1; 372 break; 373 } 374 375 va_end(ap); 376 return rv; 377 } 378 379 380 /* el_get(): 381 * retrieve the editline parameters 382 */ 383 public int 384 el_wget(EditLine *el, int op, ...) 385 { 386 va_list ap; 387 int rv; 388 389 if (el == NULL) 390 return -1; 391 392 va_start(ap, op); 393 394 switch (op) { 395 case EL_PROMPT: 396 case EL_RPROMPT: { 397 el_pfunc_t *p = va_arg(ap, el_pfunc_t *); 398 rv = prompt_get(el, p, 0, op); 399 break; 400 } 401 case EL_PROMPT_ESC: 402 case EL_RPROMPT_ESC: { 403 el_pfunc_t *p = va_arg(ap, el_pfunc_t *); 404 Char *c = va_arg(ap, Char *); 405 406 rv = prompt_get(el, p, c, op); 407 break; 408 } 409 410 case EL_EDITOR: 411 rv = map_get_editor(el, va_arg(ap, const Char **)); 412 break; 413 414 case EL_SIGNAL: 415 *va_arg(ap, int *) = (el->el_flags & HANDLE_SIGNALS); 416 rv = 0; 417 break; 418 419 case EL_EDITMODE: 420 *va_arg(ap, int *) = !(el->el_flags & EDIT_DISABLED); 421 rv = 0; 422 break; 423 424 case EL_TERMINAL: 425 terminal_get(el, va_arg(ap, const char **)); 426 rv = 0; 427 break; 428 429 case EL_GETTC: 430 { 431 static char name[] = "gettc"; 432 char *argv[20]; 433 int i; 434 435 for (i = 1; i < (int)__arraycount(argv); i++) 436 if ((argv[i] = va_arg(ap, char *)) == NULL) 437 break; 438 439 argv[0] = name; 440 rv = terminal_gettc(el, i, argv); 441 break; 442 } 443 444 case EL_GETCFN: 445 *va_arg(ap, el_rfunc_t *) = el_read_getfn(el); 446 rv = 0; 447 break; 448 449 case EL_CLIENTDATA: 450 *va_arg(ap, void **) = el->el_data; 451 rv = 0; 452 break; 453 454 case EL_UNBUFFERED: 455 *va_arg(ap, int *) = (el->el_flags & UNBUFFERED) != 0; 456 rv = 0; 457 break; 458 459 case EL_GETFP: 460 { 461 int what; 462 FILE **fpp; 463 464 what = va_arg(ap, int); 465 fpp = va_arg(ap, FILE **); 466 rv = 0; 467 switch (what) { 468 case 0: 469 *fpp = el->el_infile; 470 break; 471 case 1: 472 *fpp = el->el_outfile; 473 break; 474 case 2: 475 *fpp = el->el_errfile; 476 break; 477 default: 478 rv = -1; 479 break; 480 } 481 break; 482 } 483 default: 484 rv = -1; 485 break; 486 } 487 va_end(ap); 488 489 return rv; 490 } 491 492 493 /* el_line(): 494 * Return editing info 495 */ 496 public const LineInfoW * 497 el_wline(EditLine *el) 498 { 499 500 return (const LineInfoW *)(void *)&el->el_line; 501 } 502 503 504 /* el_source(): 505 * Source a file 506 */ 507 public int 508 el_source(EditLine *el, const char *fname) 509 { 510 FILE *fp; 511 size_t len; 512 ssize_t slen; 513 char *ptr; 514 char *path = NULL; 515 const Char *dptr; 516 int error = 0; 517 518 fp = NULL; 519 if (fname == NULL) { 520 #ifdef HAVE_ISSETUGID 521 static const char elpath[] = "/.editrc"; 522 size_t plen = sizeof(elpath); 523 524 if (issetugid()) 525 return -1; 526 if ((ptr = getenv("HOME")) == NULL) 527 return -1; 528 plen += strlen(ptr); 529 if ((path = el_malloc(plen * sizeof(*path))) == NULL) 530 return -1; 531 (void)snprintf(path, plen, "%s%s", ptr, elpath); 532 fname = path; 533 #else 534 /* 535 * If issetugid() is missing, always return an error, in order 536 * to keep from inadvertently opening up the user to a security 537 * hole. 538 */ 539 return -1; 540 #endif 541 } 542 if (fp == NULL) 543 fp = fopen(fname, "r"); 544 if (fp == NULL) { 545 el_free(path); 546 return -1; 547 } 548 549 ptr = NULL; 550 len = 0; 551 while ((slen = getline(&ptr, &len, fp)) != -1) { 552 if (*ptr == '\n') 553 continue; /* Empty line. */ 554 if (slen > 0 && ptr[--slen] == '\n') 555 ptr[slen] = '\0'; 556 557 dptr = ct_decode_string(ptr, &el->el_scratch); 558 if (!dptr) 559 continue; 560 /* loop until first non-space char or EOL */ 561 while (*dptr != '\0' && iswspace(*dptr)) 562 dptr++; 563 if (*dptr == '#') 564 continue; /* ignore, this is a comment line */ 565 if ((error = parse_line(el, dptr)) == -1) 566 break; 567 } 568 free(ptr); 569 570 el_free(path); 571 (void) fclose(fp); 572 return error; 573 } 574 575 576 /* el_resize(): 577 * Called from program when terminal is resized 578 */ 579 public void 580 el_resize(EditLine *el) 581 { 582 int lins, cols; 583 sigset_t oset, nset; 584 585 (void) sigemptyset(&nset); 586 (void) sigaddset(&nset, SIGWINCH); 587 (void) sigprocmask(SIG_BLOCK, &nset, &oset); 588 589 /* get the correct window size */ 590 if (terminal_get_size(el, &lins, &cols)) 591 terminal_change_size(el, lins, cols); 592 593 (void) sigprocmask(SIG_SETMASK, &oset, NULL); 594 } 595 596 597 /* el_beep(): 598 * Called from the program to beep 599 */ 600 public void 601 el_beep(EditLine *el) 602 { 603 604 terminal_beep(el); 605 } 606 607 608 /* el_editmode() 609 * Set the state of EDIT_DISABLED from the `edit' command. 610 */ 611 protected int 612 /*ARGSUSED*/ 613 el_editmode(EditLine *el, int argc, const Char **argv) 614 { 615 const Char *how; 616 617 if (argv == NULL || argc != 2 || argv[1] == NULL) 618 return -1; 619 620 how = argv[1]; 621 if (wcscmp(how, L"on") == 0) { 622 el->el_flags &= ~EDIT_DISABLED; 623 tty_rawmode(el); 624 } else if (wcscmp(how, L"off") == 0) { 625 tty_cookedmode(el); 626 el->el_flags |= EDIT_DISABLED; 627 } 628 else { 629 (void) fprintf(el->el_errfile, "edit: Bad value `%ls'.\n", 630 how); 631 return -1; 632 } 633 return 0; 634 } 635
Indexes created Sun Sep 21 20:09:37 GMT 2025