contrib/libedit/src/el.c

   1 /*      $NetBSD: el.c,v 1.73 2014/06/18 18:12:28 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 1.73 2014/06/18 18:12:28 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 <string.h>
  50 #include <stdlib.h>
  51 #include <stdarg.h>
  52 #include <ctype.h>
  53 #include <locale.h>
  54 #include <langinfo.h>
  55 #include "el.h"
  56
  57 #ifndef HAVE_SECURE_GETENV
  58 #       ifdef HAVE___SECURE_GETENV
  59 #               define secure_getenv __secure_getenv
  60 #               define HAVE_SECURE_GETENV 1
  61 #       else
  62 #               ifdef HAVE_ISSETUGID
  63 #                       include <unistd.h>
  64 #               else
  65 #                       undef issetugid
  66 #                       define issetugid() 1
  67 #               endif
  68 #       endif
  69 #endif
  70
  71 #ifndef HAVE_SECURE_GETENV
  72 char *secure_getenv(char const *name)
  73 {
  74         if (issetugid())
  75                 return 0;
  76         return getenv(name);
  77 }
  78 #endif
  79
  80 /* el_init():
  81  *      Initialize editline and set default parameters.
  82  */
  83 public EditLine *
  84 el_init(const char *prog, FILE *fin, FILE *fout, FILE *ferr)
  85 {
  86     return el_init_fd(prog, fin, fout, ferr, fileno(fin), fileno(fout),
  87         fileno(ferr));
  88 }
  89
  90 public EditLine *
  91 el_init_fd(const char *prog, FILE *fin, FILE *fout, FILE *ferr,
  92     int fdin, int fdout, int fderr)
  93 {
  94         EditLine *el = el_malloc(sizeof(*el));
  95
  96         if (el == NULL)
  97                 return NULL;
  98
  99         memset(el, 0, sizeof(EditLine));
 100
 101         el->el_infile = fin;
 102         el->el_outfile = fout;
 103         el->el_errfile = ferr;
 104
 105         el->el_infd = fdin;
 106         el->el_outfd = fdout;
 107         el->el_errfd = fderr;
 108
 109         el->el_prog = Strdup(ct_decode_string(prog, &el->el_scratch));
 110         if (el->el_prog == NULL) {
 111                 el_free(el);
 112                 return NULL;
 113         }
 114
 115         /*
 116          * Initialize all the modules. Order is important!!!
 117          */
 118         el->el_flags = 0;
 119 #ifdef WIDECHAR
 120         if (setlocale(LC_CTYPE, NULL) != NULL){
 121                 if (strcmp(nl_langinfo(CODESET), "UTF-8") == 0)
 122                         el->el_flags |= CHARSET_IS_UTF8;
 123         }
 124 #endif
 125
 126         if (terminal_init(el) == -1) {
 127                 el_free(el->el_prog);
 128                 el_free(el);
 129                 return NULL;
 130         }
 131         (void) keymacro_init(el);
 132         (void) map_init(el);
 133         if (tty_init(el) == -1)
 134                 el->el_flags |= NO_TTY;
 135         (void) ch_init(el);
 136         (void) search_init(el);
 137         (void) hist_init(el);
 138         (void) prompt_init(el);
 139         (void) sig_init(el);
 140         (void) read_init(el);
 141
 142         return el;
 143 }
 144
 145
 146 /* el_end():
 147  *      Clean up.
 148  */
 149 public void
 150 el_end(EditLine *el)
 151 {
 152
 153         if (el == NULL)
 154                 return;
 155
 156         el_reset(el);
 157
 158         terminal_end(el);
 159         keymacro_end(el);
 160         map_end(el);
 161         tty_end(el);
 162         ch_end(el);
 163         search_end(el);
 164         hist_end(el);
 165         prompt_end(el);
 166         sig_end(el);
 167
 168         el_free(el->el_prog);
 169 #ifdef WIDECHAR
 170         el_free(el->el_scratch.cbuff);
 171         el_free(el->el_scratch.wbuff);
 172         el_free(el->el_lgcyconv.cbuff);
 173         el_free(el->el_lgcyconv.wbuff);
 174 #endif
 175         el_free(el);
 176 }
 177
 178
 179 /* el_reset():
 180  *      Reset the tty and the parser
 181  */
 182 public void
 183 el_reset(EditLine *el)
 184 {
 185
 186         tty_cookedmode(el);
 187         ch_reset(el, 0);                /* XXX: Do we want that? */
 188 }
 189
 190
 191 /* el_set():
 192  *      set the editline parameters
 193  */
 194 public int
 195 FUN(el,set)(EditLine *el, int op, ...)
 196 {
 197         va_list ap;
 198         int rv = 0;
 199
 200         if (el == NULL)
 201                 return -1;
 202         va_start(ap, op);
 203
 204         switch (op) {
 205         case EL_PROMPT:
 206         case EL_RPROMPT: {
 207                 el_pfunc_t p = va_arg(ap, el_pfunc_t);
 208
 209                 rv = prompt_set(el, p, 0, op, 1);
 210                 break;
 211         }
 212
 213         case EL_RESIZE: {
 214                 el_zfunc_t p = va_arg(ap, el_zfunc_t);
 215                 void *arg = va_arg(ap, void *);
 216                 rv = ch_resizefun(el, p, arg);
 217                 break;
 218         }
 219
 220         case EL_ALIAS_TEXT: {
 221                 el_afunc_t p = va_arg(ap, el_afunc_t);
 222                 void *arg = va_arg(ap, void *);
 223                 rv = ch_aliasfun(el, p, arg);
 224                 break;
 225         }
 226
 227         case EL_PROMPT_ESC:
 228         case EL_RPROMPT_ESC: {
 229                 el_pfunc_t p = va_arg(ap, el_pfunc_t);
 230                 int c = va_arg(ap, int);
 231
 232                 rv = prompt_set(el, p, c, op, 1);
 233                 break;
 234         }
 235
 236         case EL_TERMINAL:
 237                 rv = terminal_set(el, va_arg(ap, char *));
 238                 break;
 239
 240         case EL_EDITOR:
 241                 rv = map_set_editor(el, va_arg(ap, Char *));
 242                 break;
 243
 244         case EL_SIGNAL:
 245                 if (va_arg(ap, int))
 246                         el->el_flags |= HANDLE_SIGNALS;
 247                 else
 248                         el->el_flags &= ~HANDLE_SIGNALS;
 249                 break;
 250
 251         case EL_BIND:
 252         case EL_TELLTC:
 253         case EL_SETTC:
 254         case EL_ECHOTC:
 255         case EL_SETTY:
 256         {
 257                 const Char *argv[20];
 258                 int i;
 259
 260                 for (i = 1; i < (int)__arraycount(argv); i++)
 261                         if ((argv[i] = va_arg(ap, Char *)) == NULL)
 262                                 break;
 263
 264                 switch (op) {
 265                 case EL_BIND:
 266                         argv[0] = STR("bind");
 267                         rv = map_bind(el, i, argv);
 268                         break;
 269
 270                 case EL_TELLTC:
 271                         argv[0] = STR("telltc");
 272                         rv = terminal_telltc(el, i, argv);
 273                         break;
 274
 275                 case EL_SETTC:
 276                         argv[0] = STR("settc");
 277                         rv = terminal_settc(el, i, argv);
 278                         break;
 279
 280                 case EL_ECHOTC:
 281                         argv[0] = STR("echotc");
 282                         rv = terminal_echotc(el, i, argv);
 283                         break;
 284
 285                 case EL_SETTY:
 286                         argv[0] = STR("setty");
 287                         rv = tty_stty(el, i, argv);
 288                         break;
 289
 290                 default:
 291                         rv = -1;
 292                         EL_ABORT((el->el_errfile, "Bad op %d\n", op));
 293                         break;
 294                 }
 295                 break;
 296         }
 297
 298         case EL_ADDFN:
 299         {
 300                 Char *name = va_arg(ap, Char *);
 301                 Char *help = va_arg(ap, Char *);
 302                 el_func_t func = va_arg(ap, el_func_t);
 303
 304                 rv = map_addfunc(el, name, help, func);
 305                 break;
 306         }
 307
 308         case EL_HIST:
 309         {
 310                 hist_fun_t func = va_arg(ap, hist_fun_t);
 311                 void *ptr = va_arg(ap, void *);
 312
 313                 rv = hist_set(el, func, ptr);
 314                 if (!(el->el_flags & CHARSET_IS_UTF8))
 315                         el->el_flags &= ~NARROW_HISTORY;
 316                 break;
 317         }
 318
 319         case EL_EDITMODE:
 320                 if (va_arg(ap, int))
 321                         el->el_flags &= ~EDIT_DISABLED;
 322                 else
 323                         el->el_flags |= EDIT_DISABLED;
 324                 rv = 0;
 325                 break;
 326
 327         case EL_GETCFN:
 328         {
 329                 el_rfunc_t rc = va_arg(ap, el_rfunc_t);
 330                 rv = el_read_setfn(el, rc);
 331                 el->el_flags &= ~NARROW_READ;
 332                 break;
 333         }
 334
 335         case EL_CLIENTDATA:
 336                 el->el_data = va_arg(ap, void *);
 337                 break;
 338
 339         case EL_UNBUFFERED:
 340                 rv = va_arg(ap, int);
 341                 if (rv && !(el->el_flags & UNBUFFERED)) {
 342                         el->el_flags |= UNBUFFERED;
 343                         read_prepare(el);
 344                 } else if (!rv && (el->el_flags & UNBUFFERED)) {
 345                         el->el_flags &= ~UNBUFFERED;
 346                         read_finish(el);
 347                 }
 348                 rv = 0;
 349                 break;
 350
 351         case EL_PREP_TERM:
 352                 rv = va_arg(ap, int);
 353                 if (rv)
 354                         (void) tty_rawmode(el);
 355                 else
 356                         (void) tty_cookedmode(el);
 357                 rv = 0;
 358                 break;
 359
 360         case EL_SETFP:
 361         {
 362                 FILE *fp;
 363                 int what;
 364
 365                 what = va_arg(ap, int);
 366                 fp = va_arg(ap, FILE *);
 367
 368                 rv = 0;
 369                 switch (what) {
 370                 case 0:
 371                         el->el_infile = fp;
 372                         el->el_infd = fileno(fp);
 373                         break;
 374                 case 1:
 375                         el->el_outfile = fp;
 376                         el->el_outfd = fileno(fp);
 377                         break;
 378                 case 2:
 379                         el->el_errfile = fp;
 380                         el->el_errfd = fileno(fp);
 381                         break;
 382                 default:
 383                         rv = -1;
 384                         break;
 385                 }
 386                 break;
 387         }
 388
 389         case EL_REFRESH:
 390                 re_clear_display(el);
 391                 re_refresh(el);
 392                 terminal__flush(el);
 393                 break;
 394
 395         default:
 396                 rv = -1;
 397                 break;
 398         }
 399
 400         va_end(ap);
 401         return rv;
 402 }
 403
 404
 405 /* el_get():
 406  *      retrieve the editline parameters
 407  */
 408 public int
 409 FUN(el,get)(EditLine *el, int op, ...)
 410 {
 411         va_list ap;
 412         int rv;
 413
 414         if (el == NULL)
 415                 return -1;
 416
 417         va_start(ap, op);
 418
 419         switch (op) {
 420         case EL_PROMPT:
 421         case EL_RPROMPT: {
 422                 el_pfunc_t *p = va_arg(ap, el_pfunc_t *);
 423                 rv = prompt_get(el, p, 0, op);
 424                 break;
 425         }
 426         case EL_PROMPT_ESC:
 427         case EL_RPROMPT_ESC: {
 428                 el_pfunc_t *p = va_arg(ap, el_pfunc_t *);
 429                 Char *c = va_arg(ap, Char *);
 430
 431                 rv = prompt_get(el, p, c, op);
 432                 break;
 433         }
 434
 435         case EL_EDITOR:
 436                 rv = map_get_editor(el, va_arg(ap, const Char **));
 437                 break;
 438
 439         case EL_SIGNAL:
 440                 *va_arg(ap, int *) = (el->el_flags & HANDLE_SIGNALS);
 441                 rv = 0;
 442                 break;
 443
 444         case EL_EDITMODE:
 445                 *va_arg(ap, int *) = !(el->el_flags & EDIT_DISABLED);
 446                 rv = 0;
 447                 break;
 448
 449         case EL_TERMINAL:
 450                 terminal_get(el, va_arg(ap, const char **));
 451                 rv = 0;
 452                 break;
 453
 454         case EL_GETTC:
 455         {
 456                 static char name[] = "gettc";
 457                 char *argv[20];
 458                 int i;
 459
 460                 for (i = 1; i < (int)__arraycount(argv); i++)
 461                         if ((argv[i] = va_arg(ap, char *)) == NULL)
 462                                 break;
 463
 464                 argv[0] = name;
 465                 rv = terminal_gettc(el, i, argv);
 466                 break;
 467         }
 468
 469         case EL_GETCFN:
 470                 *va_arg(ap, el_rfunc_t *) = el_read_getfn(el);
 471                 rv = 0;
 472                 break;
 473
 474         case EL_CLIENTDATA:
 475                 *va_arg(ap, void **) = el->el_data;
 476                 rv = 0;
 477                 break;
 478
 479         case EL_UNBUFFERED:
 480                 *va_arg(ap, int *) = (el->el_flags & UNBUFFERED) != 0;
 481                 rv = 0;
 482                 break;
 483
 484         case EL_GETFP:
 485         {
 486                 int what;
 487                 FILE **fpp;
 488
 489                 what = va_arg(ap, int);
 490                 fpp = va_arg(ap, FILE **);
 491                 rv = 0;
 492                 switch (what) {
 493                 case 0:
 494                         *fpp = el->el_infile;
 495                         break;
 496                 case 1:
 497                         *fpp = el->el_outfile;
 498                         break;
 499                 case 2:
 500                         *fpp = el->el_errfile;
 501                         break;
 502                 default:
 503                         rv = -1;
 504                         break;
 505                 }
 506                 break;
 507         }
 508         default:
 509                 rv = -1;
 510                 break;
 511         }
 512         va_end(ap);
 513
 514         return rv;
 515 }
 516
 517
 518 /* el_line():
 519  *      Return editing info
 520  */
 521 public const TYPE(LineInfo) *
 522 FUN(el,line)(EditLine *el)
 523 {
 524
 525         return (const TYPE(LineInfo) *)(void *)&el->el_line;
 526 }
 527
 528
 529 /* el_source():
 530  *      Source a file
 531  */
 532 public int
 533 el_source(EditLine *el, const char *fname)
 534 {
 535         FILE *fp;
 536         size_t len;
 537         char *ptr;
 538         char *path = NULL;
 539         const Char *dptr;
 540         int error = 0;
 541
 542         fp = NULL;
 543         if (fname == NULL) {
 544                 static const char elpath[] = "/.editrc";
 545                 size_t plen = sizeof(elpath);
 546
 547                 if ((ptr = secure_getenv("HOME")) == NULL)
 548                         return -1;
 549                 plen += strlen(ptr);
 550                 if ((path = el_malloc(plen * sizeof(*path))) == NULL)
 551                         return -1;
 552                 (void)snprintf(path, plen, "%s%s", ptr, elpath);
 553                 fname = path;
 554         }
 555         if (fp == NULL)
 556                 fp = fopen(fname, "r");
 557         if (fp == NULL) {
 558                 el_free(path);
 559                 return -1;
 560         }
 561
 562         while ((ptr = fgetln(fp, &len)) != NULL) {
 563                 if (*ptr == '\n')
 564                         continue;       /* Empty line. */
 565                 dptr = ct_decode_string(ptr, &el->el_scratch);
 566                 if (!dptr)
 567                         continue;
 568                 if (len > 0 && dptr[len - 1] == '\n')
 569                         --len;
 570
 571                 /* loop until first non-space char or EOL */
 572                 while (*dptr != '\0' && Isspace(*dptr))
 573                         dptr++;
 574                 if (*dptr == '#')
 575                         continue;   /* ignore, this is a comment line */
 576                 if ((error = parse_line(el, dptr)) == -1)
 577                         break;
 578         }
 579
 580         el_free(path);
 581         (void) fclose(fp);
 582         return error;
 583 }
 584
 585
 586 /* el_resize():
 587  *      Called from program when terminal is resized
 588  */
 589 public void
 590 el_resize(EditLine *el)
 591 {
 592         int lins, cols;
 593         sigset_t oset, nset;
 594
 595         (void) sigemptyset(&nset);
 596         (void) sigaddset(&nset, SIGWINCH);
 597         (void) sigprocmask(SIG_BLOCK, &nset, &oset);
 598
 599         /* get the correct window size */
 600         if (terminal_get_size(el, &lins, &cols))
 601                 terminal_change_size(el, lins, cols);
 602
 603         (void) sigprocmask(SIG_SETMASK, &oset, NULL);
 604 }
 605
 606
 607 /* el_beep():
 608  *      Called from the program to beep
 609  */
 610 public void
 611 el_beep(EditLine *el)
 612 {
 613
 614         terminal_beep(el);
 615 }
 616
 617
 618 /* el_editmode()
 619  *      Set the state of EDIT_DISABLED from the `edit' command.
 620  */
 621 protected int
 622 /*ARGSUSED*/
 623 el_editmode(EditLine *el, int argc, const Char **argv)
 624 {
 625         const Char *how;
 626
 627         if (argv == NULL || argc != 2 || argv[1] == NULL)
 628                 return -1;
 629
 630         how = argv[1];
 631         if (Strcmp(how, STR("on")) == 0) {
 632                 el->el_flags &= ~EDIT_DISABLED;
 633                 tty_rawmode(el);
 634         } else if (Strcmp(how, STR("off")) == 0) {
 635                 tty_cookedmode(el);
 636                 el->el_flags |= EDIT_DISABLED;
 637         }
 638         else {
 639                 (void) fprintf(el->el_errfile, "edit: Bad value `" FSTR "'.\n",
 640                     how);
 641                 return -1;
 642         }
 643         return 0;
 644 }