1 /* $OpenBSD: main.c,v 1.18 2009/02/01 21:57:21 miod Exp $ */ 2 3 /*- 4 * Copyright (c) 1992, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * Copyright (c) 1992, 1993, 1994, 1995, 1996 7 * Keith Bostic. All rights reserved. 8 * 9 * See the LICENSE file for redistribution information. 10 */ 11 12 #include "config.h" 13 14 #ifndef lint 15 static const char copyright[] = 16 "@(#) Copyright (c) 1992, 1993, 1994\n\ 17 The Regents of the University of California. All rights reserved.\n\ 18 @(#) Copyright (c) 1992, 1993, 1994, 1995, 1996\n\ 19 Keith Bostic. All rights reserved.\n"; 20 #endif /* not lint */ 21 22 #ifndef lint 23 static const char sccsid[] = "@(#)main.c 10.48 (Berkeley) 10/11/96"; 24 #endif /* not lint */ 25 26 #include <sys/types.h> 27 #include <sys/queue.h> 28 #include <sys/stat.h> 29 #include <sys/time.h> 30 31 #include <bitstring.h> 32 #include <errno.h> 33 #include <fcntl.h> 34 #include <limits.h> 35 #include <stdio.h> 36 #include <stdlib.h> 37 #include <string.h> 38 #include <unistd.h> 39 40 #include "common.h" 41 #include "../vi/vi.h" 42 #include "pathnames.h" 43 44 #ifdef DEBUG 45 static void attach(GS *); 46 #endif 47 static void v_estr(char *, int, char *); 48 static int v_obsolete(char *, char *[]); 49 50 /* 51 * editor -- 52 * Main editor routine. 53 * 54 * PUBLIC: int editor(GS *, int, char *[]); 55 */ 56 int 57 editor(gp, argc, argv) 58 GS *gp; 59 int argc; 60 char *argv[]; 61 { 62 extern int optind; 63 extern char *optarg; 64 const char *p; 65 EVENT ev; 66 FREF *frp; 67 SCR *sp; 68 size_t len; 69 u_int flags; 70 int ch, flagchk, lflag, secure, startup, readonly, rval, silent; 71 char *tag_f, *wsizearg, path[256]; 72 73 static const char *optstr[3] = { 74 #ifdef DEBUG 75 "c:D:FlRrSsT:t:vw:", 76 "c:D:eFlRrST:t:w:", 77 "c:D:eFlrST:t:w:" 78 #else 79 "c:FlRrSst:vw:", 80 "c:eFlRrSt:w:", 81 "c:eFlrSt:w:" 82 #endif 83 }; 84 85 /* Initialize the busy routine, if not defined by the screen. */ 86 if (gp->scr_busy == NULL) 87 gp->scr_busy = vs_busy; 88 /* Initialize the message routine, if not defined by the screen. */ 89 if (gp->scr_msg == NULL) 90 gp->scr_msg = vs_msg; 91 92 /* Common global structure initialization. */ 93 CIRCLEQ_INIT(&gp->dq); 94 CIRCLEQ_INIT(&gp->hq); 95 LIST_INIT(&gp->ecq); 96 LIST_INSERT_HEAD(&gp->ecq, &gp->excmd, q); 97 gp->noprint = DEFAULT_NOPRINT; 98 99 /* Structures shared by screens so stored in the GS structure. */ 100 CIRCLEQ_INIT(&gp->frefq); 101 CIRCLEQ_INIT(&gp->dcb_store.textq); 102 LIST_INIT(&gp->cutq); 103 LIST_INIT(&gp->seqq); 104 105 /* Set initial screen type and mode based on the program name. */ 106 readonly = 0; 107 if (!strcmp(gp->progname, "ex") || !strcmp(gp->progname, "nex")) 108 LF_INIT(SC_EX); 109 else { 110 /* Nview, view are readonly. */ 111 if (!strcmp(gp->progname, "nview") || 112 !strcmp(gp->progname, "view")) 113 readonly = 1; 114 115 /* Vi is the default. */ 116 LF_INIT(SC_VI); 117 } 118 119 /* Convert old-style arguments into new-style ones. */ 120 if (v_obsolete(gp->progname, argv)) 121 return (1); 122 123 /* Parse the arguments. */ 124 flagchk = '\0'; 125 tag_f = wsizearg = NULL; 126 lflag = secure = silent = 0; 127 startup = 1; 128 129 /* Set the file snapshot flag. */ 130 F_SET(gp, G_SNAPSHOT); 131 132 pmode = MODE_EX; 133 if (!strcmp(gp->progname, "ex")) 134 pmode = MODE_EX; 135 else if (!strcmp(gp->progname, "vi")) 136 pmode = MODE_VI; 137 else if (!strcmp(gp->progname, "view")) 138 pmode = MODE_VIEW; 139 140 while ((ch = getopt(argc, argv, optstr[pmode])) != -1) 141 switch (ch) { 142 case 'c': /* Run the command. */ 143 /* 144 * XXX 145 * We should support multiple -c options. 146 */ 147 if (gp->c_option != NULL) { 148 v_estr(gp->progname, 0, 149 "only one -c command may be specified."); 150 return (1); 151 } 152 gp->c_option = optarg; 153 break; 154 #ifdef DEBUG 155 case 'D': 156 switch (optarg[0]) { 157 case 's': 158 startup = 0; 159 break; 160 case 'w': 161 attach(gp); 162 break; 163 default: 164 v_estr(gp->progname, 0, 165 "-D requires s or w argument."); 166 return (1); 167 } 168 break; 169 #endif 170 case 'e': /* Ex mode. */ 171 LF_CLR(SC_VI); 172 LF_SET(SC_EX); 173 break; 174 case 'F': /* No snapshot. */ 175 F_CLR(gp, G_SNAPSHOT); 176 break; 177 case 'l': /* Set lisp, showmatch options. */ 178 lflag = 1; 179 break; 180 case 'R': /* Readonly. */ 181 readonly = 1; 182 break; 183 case 'r': /* Recover. */ 184 if (flagchk == 't') { 185 v_estr(gp->progname, 0, 186 "only one of -r and -t may be specified."); 187 return (1); 188 } 189 flagchk = 'r'; 190 break; 191 case 'S': 192 secure = 1; 193 break; 194 case 's': 195 silent = 1; 196 break; 197 #ifdef DEBUG 198 case 'T': /* Trace. */ 199 if ((gp->tracefp = fopen(optarg, "w")) == NULL) { 200 v_estr(gp->progname, errno, optarg); 201 goto err; 202 } 203 (void)fprintf(gp->tracefp, 204 "\n===\ntrace: open %s\n", optarg); 205 break; 206 #endif 207 case 't': /* Tag. */ 208 if (flagchk == 'r') { 209 v_estr(gp->progname, 0, 210 "only one of -r and -t may be specified."); 211 return (1); 212 } 213 if (flagchk == 't') { 214 v_estr(gp->progname, 0, 215 "only one tag file may be specified."); 216 return (1); 217 } 218 flagchk = 't'; 219 tag_f = optarg; 220 break; 221 case 'v': /* Vi mode. */ 222 LF_CLR(SC_EX); 223 LF_SET(SC_VI); 224 break; 225 case 'w': 226 wsizearg = optarg; 227 break; 228 case '?': 229 default: 230 (void)gp->scr_usage(); 231 return (1); 232 } 233 argc -= optind; 234 argv += optind; 235 236 /* 237 * -s option is only meaningful to ex. 238 * 239 * If not reading from a terminal, it's like -s was specified. 240 */ 241 if (silent && !LF_ISSET(SC_EX)) { 242 v_estr(gp->progname, 0, "-s option is only applicable to ex."); 243 goto err; 244 } 245 if (LF_ISSET(SC_EX) && F_ISSET(gp, G_SCRIPTED)) 246 silent = 1; 247 248 /* 249 * Build and initialize the first/current screen. This is a bit 250 * tricky. If an error is returned, we may or may not have a 251 * screen structure. If we have a screen structure, put it on a 252 * display queue so that the error messages get displayed. 253 * 254 * !!! 255 * Everything we do until we go interactive is done in ex mode. 256 */ 257 if (screen_init(gp, NULL, &sp)) { 258 if (sp != NULL) 259 CIRCLEQ_INSERT_HEAD(&gp->dq, sp, q); 260 goto err; 261 } 262 F_SET(sp, SC_EX); 263 CIRCLEQ_INSERT_HEAD(&gp->dq, sp, q); 264 265 if (v_key_init(sp)) /* Special key initialization. */ 266 goto err; 267 268 { int oargs[5], *oargp = oargs; 269 if (lflag) { /* Command-line options. */ 270 *oargp++ = O_LISP; 271 *oargp++ = O_SHOWMATCH; 272 } 273 if (readonly) 274 *oargp++ = O_READONLY; 275 if (secure) 276 *oargp++ = O_SECURE; 277 *oargp = -1; /* Options initialization. */ 278 if (opts_init(sp, oargs)) 279 goto err; 280 } 281 if (wsizearg != NULL) { 282 ARGS *av[2], a, b; 283 (void)snprintf(path, sizeof(path), "window=%s", wsizearg); 284 a.bp = (CHAR_T *)path; 285 a.len = strlen(path); 286 b.bp = NULL; 287 b.len = 0; 288 av[0] = &a; 289 av[1] = &b; 290 (void)opts_set(sp, av, NULL); 291 } 292 if (silent) { /* Ex batch mode option values. */ 293 O_CLR(sp, O_AUTOPRINT); 294 O_CLR(sp, O_PROMPT); 295 O_CLR(sp, O_VERBOSE); 296 O_CLR(sp, O_WARN); 297 F_SET(sp, SC_EX_SILENT); 298 } 299 300 sp->rows = O_VAL(sp, O_LINES); /* Make ex formatting work. */ 301 sp->cols = O_VAL(sp, O_COLUMNS); 302 303 if (!silent && startup) { /* Read EXINIT, exrc files. */ 304 if (ex_exrc(sp)) 305 goto err; 306 if (F_ISSET(sp, SC_EXIT | SC_EXIT_FORCE)) { 307 if (screen_end(sp)) 308 goto err; 309 goto done; 310 } 311 } 312 313 /* 314 * List recovery files if -r specified without file arguments. 315 * Note, options must be initialized and startup information 316 * read before doing this. 317 */ 318 if (flagchk == 'r' && argv[0] == NULL) { 319 if (rcv_list(sp)) 320 goto err; 321 if (screen_end(sp)) 322 goto err; 323 goto done; 324 } 325 326 /* 327 * !!! 328 * Initialize the default ^D, ^U scrolling value here, after the 329 * user has had every opportunity to set the window option. 330 * 331 * It's historic practice that changing the value of the window 332 * option did not alter the default scrolling value, only giving 333 * a count to ^D/^U did that. 334 */ 335 sp->defscroll = (O_VAL(sp, O_WINDOW) + 1) / 2; 336 337 /* 338 * If we don't have a command-line option, switch into the right 339 * editor now, so that we position default files correctly, and 340 * so that any tags file file-already-locked messages are in the 341 * vi screen, not the ex screen. 342 * 343 * XXX 344 * If we have a command-line option, the error message can end 345 * up in the wrong place, but I think that the combination is 346 * unlikely. 347 */ 348 if (gp->c_option == NULL) { 349 F_CLR(sp, SC_EX | SC_VI); 350 F_SET(sp, LF_ISSET(SC_EX | SC_VI)); 351 } 352 353 /* Open a tag file if specified. */ 354 if (tag_f != NULL && ex_tag_first(sp, tag_f)) 355 goto err; 356 357 /* 358 * Append any remaining arguments as file names. Files are recovery 359 * files if -r specified. If the tag option or ex startup commands 360 * loaded a file, then any file arguments are going to come after it. 361 */ 362 if (*argv != NULL) { 363 if (sp->frp != NULL) { 364 size_t l; 365 /* Cheat -- we know we have an extra argv slot. */ 366 l = strlen(sp->frp->name) + 1; 367 MALLOC_NOMSG(sp, *--argv, char *, l); 368 if (*argv == NULL) { 369 v_estr(gp->progname, errno, NULL); 370 goto err; 371 } 372 (void)strlcpy(*argv, sp->frp->name, l); 373 } 374 sp->argv = sp->cargv = argv; 375 F_SET(sp, SC_ARGNOFREE); 376 if (flagchk == 'r') 377 F_SET(sp, SC_ARGRECOVER); 378 } 379 380 /* 381 * If the ex startup commands and or/the tag option haven't already 382 * created a file, create one. If no command-line files were given, 383 * use a temporary file. 384 */ 385 if (sp->frp == NULL) { 386 if (sp->argv == NULL) { 387 if ((frp = file_add(sp, NULL)) == NULL) 388 goto err; 389 } else { 390 if ((frp = file_add(sp, (CHAR_T *)sp->argv[0])) == NULL) 391 goto err; 392 if (F_ISSET(sp, SC_ARGRECOVER)) 393 F_SET(frp, FR_RECOVER); 394 } 395 396 if (file_init(sp, frp, NULL, 0)) 397 goto err; 398 if (EXCMD_RUNNING(gp)) { 399 (void)ex_cmd(sp); 400 if (F_ISSET(sp, SC_EXIT | SC_EXIT_FORCE)) { 401 if (screen_end(sp)) 402 goto err; 403 goto done; 404 } 405 } 406 } 407 408 /* 409 * Check to see if we need to wait for ex. If SC_SCR_EX is set, ex 410 * was forced to initialize the screen during startup. We'd like to 411 * wait for a single character from the user, but we can't because 412 * we're not in raw mode. We can't switch to raw mode because the 413 * vi initialization will switch to xterm's alternate screen, causing 414 * us to lose the messages we're pausing to make sure the user read. 415 * So, wait for a complete line. 416 */ 417 if (F_ISSET(sp, SC_SCR_EX)) { 418 p = msg_cmsg(sp, CMSG_CONT_R, &len); 419 (void)write(STDOUT_FILENO, p, len); 420 for (;;) { 421 if (v_event_get(sp, &ev, 0, 0)) 422 goto err; 423 if (ev.e_event == E_INTERRUPT || 424 (ev.e_event == E_CHARACTER && 425 (ev.e_value == K_CR || ev.e_value == K_NL))) 426 break; 427 (void)gp->scr_bell(sp); 428 } 429 } 430 431 /* Switch into the right editor, regardless. */ 432 F_CLR(sp, SC_EX | SC_VI); 433 F_SET(sp, LF_ISSET(SC_EX | SC_VI) | SC_STATUS_CNT); 434 435 /* 436 * Main edit loop. Vi handles split screens itself, we only return 437 * here when switching editor modes or restarting the screen. 438 */ 439 while (sp != NULL) 440 if (F_ISSET(sp, SC_EX) ? ex(&sp) : vi(&sp)) 441 goto err; 442 443 done: rval = 0; 444 if (0) 445 err: rval = 1; 446 447 /* Clean out the global structure. */ 448 v_end(gp); 449 450 return (rval); 451 } 452 453 /* 454 * v_end -- 455 * End the program, discarding screens and most of the global area. 456 * 457 * PUBLIC: void v_end(GS *); 458 */ 459 void 460 v_end(gp) 461 GS *gp; 462 { 463 MSGS *mp; 464 SCR *sp; 465 466 /* If there are any remaining screens, kill them off. */ 467 if (gp->ccl_sp != NULL) { 468 (void)file_end(gp->ccl_sp, NULL, 1); 469 (void)screen_end(gp->ccl_sp); 470 } 471 while ((sp = CIRCLEQ_FIRST(&gp->dq)) != CIRCLEQ_END(&gp->dq)) 472 (void)screen_end(sp); 473 while ((sp = CIRCLEQ_FIRST(&gp->hq)) != CIRCLEQ_END(&gp->hq)) 474 (void)screen_end(sp); 475 476 #ifdef HAVE_PERL_INTERP 477 perl_end(gp); 478 #endif 479 480 #if defined(DEBUG) || defined(PURIFY) || defined(LIBRARY) 481 { FREF *frp; 482 /* Free FREF's. */ 483 while ((frp = CIRCLEQ_FIRST(&gp->frefq)) != CIRCLEQ_END(&gp->frefq)) { 484 CIRCLEQ_REMOVE(&gp->frefq, frp, q); 485 if (frp->name != NULL) 486 free(frp->name); 487 if (frp->tname != NULL) 488 free(frp->tname); 489 free(frp); 490 } 491 } 492 493 /* Free key input queue. */ 494 if (gp->i_event != NULL) 495 free(gp->i_event); 496 497 /* Free cut buffers. */ 498 cut_close(gp); 499 500 /* Free map sequences. */ 501 seq_close(gp); 502 503 /* Free default buffer storage. */ 504 (void)text_lfree(&gp->dcb_store.textq); 505 506 /* Close message catalogs. */ 507 msg_close(gp); 508 #endif 509 510 /* Ring the bell if scheduled. */ 511 if (F_ISSET(gp, G_BELLSCHED)) 512 (void)fprintf(stderr, "\07"); /* \a */ 513 514 /* 515 * Flush any remaining messages. If a message is here, it's almost 516 * certainly the message about the event that killed us (although 517 * it's possible that the user is sourcing a file that exits from the 518 * editor). 519 */ 520 while ((mp = LIST_FIRST(&gp->msgq)) != NULL) { 521 (void)fprintf(stderr, "%s%.*s", 522 mp->mtype == M_ERR ? "ex/vi: " : "", (int)mp->len, mp->buf); 523 LIST_REMOVE(mp, q); 524 #if defined(DEBUG) || defined(PURIFY) || defined(LIBRARY) 525 free(mp->buf); 526 free(mp); 527 #endif 528 } 529 530 #if defined(DEBUG) || defined(PURIFY) || defined(LIBRARY) 531 /* Free any temporary space. */ 532 if (gp->tmp_bp != NULL) 533 free(gp->tmp_bp); 534 535 #if defined(DEBUG) 536 /* Close debugging file descriptor. */ 537 if (gp->tracefp != NULL) 538 (void)fclose(gp->tracefp); 539 #endif 540 #endif 541 } 542 543 /* 544 * v_obsolete -- 545 * Convert historic arguments into something getopt(3) will like. 546 */ 547 static int 548 v_obsolete(name, argv) 549 char *name, *argv[]; 550 { 551 size_t len; 552 char *p; 553 554 /* 555 * Translate old style arguments into something getopt will like. 556 * Make sure it's not text space memory, because ex modifies the 557 * strings. 558 * Change "+" into "-c$". 559 * Change "+<anything else>" into "-c<anything else>". 560 * Change "-" into "-s" 561 * The c, T, t and w options take arguments so they can't be 562 * special arguments. 563 * 564 * Stop if we find "--" as an argument, the user may want to edit 565 * a file named "+foo". 566 */ 567 while (*++argv && strcmp(argv[0], "--")) 568 if (argv[0][0] == '+') { 569 if (argv[0][1] == '\0') { 570 argv[0] = strdup("-c$"); 571 if (argv[0] == NULL) 572 goto nomem; 573 } else { 574 p = argv[0]; 575 len = strlen(argv[0]); 576 MALLOC_NOMSG(NULL, argv[0], char *, len + 2); 577 if (argv[0] == NULL) 578 goto nomem; 579 argv[0][0] = '-'; 580 argv[0][1] = 'c'; 581 (void)strlcpy(argv[0] + 2, p + 1, len); 582 } 583 } else if (argv[0][0] == '-') { 584 if (argv[0][1] == '\0') { 585 argv[0] = strdup("-s"); 586 if (argv[0] == NULL) { 587 nomem: v_estr(name, errno, NULL); 588 return (1); 589 } 590 } else 591 if ((argv[0][1] == 'c' || argv[0][1] == 'T' || 592 argv[0][1] == 't' || argv[0][1] == 'w') && 593 argv[0][2] == '\0') 594 ++argv; 595 } 596 return (0); 597 } 598 599 #ifdef DEBUG 600 static void 601 attach(gp) 602 GS *gp; 603 { 604 int fd; 605 char ch; 606 607 if ((fd = open(_PATH_TTY, O_RDONLY, 0)) < 0) { 608 v_estr(gp->progname, errno, _PATH_TTY); 609 return; 610 } 611 612 (void)printf("process %ld waiting, enter <CR> to continue: ", 613 (long)getpid()); 614 (void)fflush(stdout); 615 616 do { 617 if (read(fd, &ch, 1) != 1) { 618 (void)close(fd); 619 return; 620 } 621 } while (ch != '\n' && ch != '\r'); 622 (void)close(fd); 623 } 624 #endif 625 626 static void 627 v_estr(name, eno, msg) 628 char *name, *msg; 629 int eno; 630 { 631 (void)fprintf(stderr, "%s", name); 632 if (msg != NULL) 633 (void)fprintf(stderr, ": %s", msg); 634 if (eno) 635 (void)fprintf(stderr, ": %s", strerror(errno)); 636 (void)fprintf(stderr, "\n"); 637 } 638