1 /* $OpenBSD: main.c,v 1.77 2009/10/14 17:19:47 sthen Exp $ */ 2 /* $NetBSD: main.c,v 1.46 2016/01/23 14:24:43 christos Exp $ */ 3 4 /*- 5 * Copyright (c) 1989, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Ozan Yigit at York University. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. 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 /* 37 * main.c 38 * Facility: m4 macro processor 39 * by: oz 40 */ 41 #if HAVE_NBTOOL_CONFIG_H 42 #include "nbtool_config.h" 43 #endif 44 #include <sys/cdefs.h> 45 __RCSID("$NetBSD: main.c,v 1.46 2016/01/23 14:24:43 christos Exp $"); 46 #include <assert.h> 47 #include <signal.h> 48 #include <getopt.h> 49 #include <err.h> 50 #include <errno.h> 51 #include <unistd.h> 52 #include <stdio.h> 53 #include <ctype.h> 54 #include <string.h> 55 #include <stddef.h> 56 #include <stdint.h> 57 #include <stdlib.h> 58 #include <ohash.h> 59 #include "mdef.h" 60 #include "stdd.h" 61 #include "extern.h" 62 #include "pathnames.h" 63 64 ndptr hashtab[HASHSIZE]; /* hash table for macros etc. */ 65 stae *mstack; /* stack of m4 machine */ 66 char *sstack; /* shadow stack, for string space extension */ 67 static size_t STACKMAX; /* current maximum size of stack */ 68 int sp; /* current m4 stack pointer */ 69 int fp; /* m4 call frame pointer */ 70 struct input_file infile[MAXINP];/* input file stack (0=stdin) */ 71 FILE **outfile; /* diversion array(0=bitbucket)*/ 72 int maxout; 73 FILE *active; /* active output file pointer */ 74 int ilevel = 0; /* input file stack pointer */ 75 int oindex = 0; /* diversion index.. */ 76 const char *null = ""; /* as it says.. just a null.. */ 77 char **m4wraps = NULL; /* m4wraps array. */ 78 int maxwraps = 0; /* size of m4wraps array */ 79 int wrapindex = 0; /* current offset in m4wraps */ 80 char lquote[MAXCCHARS+1] = {LQUOTE}; /* left quote character (`) */ 81 char rquote[MAXCCHARS+1] = {RQUOTE}; /* right quote character (') */ 82 char scommt[MAXCCHARS+1] = {SCOMMT}; /* start character for comment */ 83 char ecommt[MAXCCHARS+1] = {ECOMMT}; /* end character for comment */ 84 int synch_lines = 0; /* line synchronisation for C preprocessor */ 85 int prefix_builtins = 0; /* -P option to prefix builtin keywords */ 86 int fatal_warnings = 0; /* -E option to exit on warnings */ 87 int quiet = 0; /* -Q option to silence warnings */ 88 int nesting_limit = -1; /* -L for nesting limit */ 89 const char *freeze = NULL; /* -F to freeze state */ 90 const char *reload = NULL; /* -R to reload state */ 91 #ifndef REAL_FREEZE 92 FILE *freezef = NULL; 93 int thawing = 0; 94 #endif 95 96 struct keyblk { 97 const char *knam; /* keyword name */ 98 int ktyp; /* keyword type */ 99 }; 100 101 struct keyblk keywrds[] = { /* m4 keywords to be installed */ 102 { "include", INCLTYPE }, 103 { "sinclude", SINCTYPE }, 104 { "define", DEFITYPE }, 105 { "defn", DEFNTYPE }, 106 { "divert", DIVRTYPE | NOARGS }, 107 { "expr", EXPRTYPE }, 108 { "eval", EXPRTYPE }, 109 { "substr", SUBSTYPE }, 110 { "ifelse", IFELTYPE }, 111 { "ifdef", IFDFTYPE }, 112 { "len", LENGTYPE }, 113 { "incr", INCRTYPE }, 114 { "decr", DECRTYPE }, 115 { "dnl", DNLNTYPE | NOARGS }, 116 { "changequote", CHNQTYPE | NOARGS }, 117 { "changecom", CHNCTYPE | NOARGS }, 118 { "index", INDXTYPE }, 119 #ifdef EXTENDED 120 { "paste", PASTTYPE }, 121 { "spaste", SPASTYPE }, 122 /* Newer extensions, needed to handle gnu-m4 scripts */ 123 { "indir", INDIRTYPE}, 124 { "builtin", BUILTINTYPE}, 125 { "patsubst", PATSTYPE}, 126 { "regexp", REGEXPTYPE}, 127 { "esyscmd", ESYSCMDTYPE}, 128 { "__file__", FILENAMETYPE | NOARGS}, 129 { "__line__", LINETYPE | NOARGS}, 130 #endif 131 { "popdef", POPDTYPE }, 132 { "pushdef", PUSDTYPE }, 133 { "dumpdef", DUMPTYPE | NOARGS }, 134 { "shift", SHIFTYPE | NOARGS }, 135 { "translit", TRNLTYPE }, 136 { "undefine", UNDFTYPE }, 137 { "undivert", UNDVTYPE | NOARGS }, 138 { "divnum", DIVNTYPE | NOARGS }, 139 { "maketemp", MKTMTYPE }, 140 { "errprint", ERRPTYPE | NOARGS }, 141 { "m4wrap", M4WRTYPE | NOARGS }, 142 { "m4exit", EXITTYPE | NOARGS }, 143 { "syscmd", SYSCTYPE }, 144 { "sysval", SYSVTYPE | NOARGS }, 145 { "traceon", TRACEONTYPE | NOARGS }, 146 { "traceoff", TRACEOFFTYPE | NOARGS }, 147 148 #if defined(unix) || defined(__unix__) 149 { "unix", SELFTYPE | NOARGS }, 150 #else 151 #ifdef vms 152 { "vms", SELFTYPE | NOARGS }, 153 #endif 154 #endif 155 }; 156 157 #define MAXKEYS (sizeof(keywrds)/sizeof(struct keyblk)) 158 159 #define MAXRECORD 50 160 static struct position { 161 char *name; 162 unsigned long line; 163 } quotes[MAXRECORD], paren[MAXRECORD]; 164 165 static void record(struct position *, int); 166 static void dump_stack(struct position *, int); 167 168 static void macro(void); 169 static void initkwds(void); 170 static ndptr inspect(int, char *); 171 static int do_look_ahead(int, const char *); 172 static void reallyoutputstr(const char *); 173 static void reallyputchar(int); 174 175 static void enlarge_stack(void); 176 static void help(void); 177 178 static void 179 usage(FILE *f) 180 { 181 fprintf(f, "Usage: %s [-EGgiPQsv] [-Dname[=value]] [-d flags] " 182 "[-I dirname] [-o filename] [-L limit]\n" 183 "\t[-t macro] [-Uname] [file ...]\n", getprogname()); 184 } 185 186 __dead static void 187 onintr(int signo) 188 { 189 char intrmessage[] = "m4: interrupted.\n"; 190 write(STDERR_FILENO, intrmessage, sizeof(intrmessage)-1); 191 _exit(1); 192 } 193 194 #define OPT_HELP 1 195 196 struct option longopts[] = { 197 { "debug", optional_argument, 0, 'd' }, 198 { "define", required_argument, 0, 'D' }, 199 { "error-output", required_argument, 0, 'e' }, 200 { "fatal-warnings", no_argument, 0, 'E' }, 201 { "freeze-state", required_argument, 0, 'F' }, 202 { "gnu", no_argument, 0, 'g' }, 203 { "help", no_argument, 0, OPT_HELP }, 204 { "include", required_argument, 0, 'I' }, 205 { "interactive", no_argument, 0, 'i' }, 206 { "nesting-limit", required_argument, 0, 'L' }, 207 { "prefix-builtins", no_argument, 0, 'P' }, 208 { "quiet", no_argument, 0, 'Q' }, 209 { "reload-state", required_argument, 0, 'R' }, 210 { "silent", no_argument, 0, 'Q' }, 211 { "synclines", no_argument, 0, 's' }, 212 { "trace", required_argument, 0, 't' }, 213 { "traditional", no_argument, 0, 'G' }, 214 { "undefine", required_argument, 0, 'U' }, 215 { "version", no_argument, 0, 'v' }, 216 #ifdef notyet 217 { "arglength", required_argument, 0, 'l' }, 218 { "debugfile", optional_argument, 0, OPT_DEBUGFILE }, 219 { "hashsize", required_argument, 0, 'H' }, 220 { "warn-macro-sequence",optional_argument, 0, OPT_WARN_SEQUENCE }, 221 #endif 222 { 0, 0, 0, 0 }, 223 }; 224 225 int 226 main(int argc, char *argv[]) 227 { 228 int c; 229 int n; 230 char *p; 231 232 setprogname(argv[0]); 233 234 if (signal(SIGINT, SIG_IGN) != SIG_IGN) 235 signal(SIGINT, onintr); 236 237 init_macros(); 238 initspaces(); 239 STACKMAX = INITSTACKMAX; 240 241 mstack = (stae *)xalloc(sizeof(stae) * STACKMAX, NULL); 242 sstack = (char *)xalloc(STACKMAX, NULL); 243 244 maxout = 0; 245 outfile = NULL; 246 resizedivs(MAXOUT); 247 248 while ((c = getopt_long(argc, argv, "D:d:e:EF:GgI:iL:o:PR:Qst:U:v", 249 longopts, NULL)) != -1) 250 switch(c) { 251 case 'D': /* define something..*/ 252 for (p = optarg; *p; p++) 253 if (*p == '=') 254 break; 255 if (*p) 256 *p++ = EOS; 257 dodefine(optarg, p); 258 break; 259 case 'd': 260 set_trace_flags(optarg); 261 break; 262 case 'E': 263 fatal_warnings++; 264 break; 265 case 'e': 266 if (freopen(optarg, "w+", stderr) == NULL) 267 err(EXIT_FAILURE, "Can't redirect errors to `%s'", 268 optarg); 269 break; 270 case 'F': 271 freeze = optarg; 272 #ifndef REAL_FREEZE 273 if ((freezef = fopen(freeze, "w")) == NULL) 274 err(EXIT_FAILURE, "Can't open `%s'", freeze); 275 #endif 276 break; 277 case 'I': 278 addtoincludepath(optarg); 279 break; 280 case 'i': 281 setvbuf(stdout, NULL, _IONBF, 0); 282 signal(SIGINT, SIG_IGN); 283 break; 284 case 'G': 285 mimic_gnu = 0; 286 break; 287 case 'g': 288 mimic_gnu = 1; 289 break; 290 case 'L': 291 nesting_limit = atoi(optarg); 292 break; 293 case 'o': 294 trace_file(optarg); 295 break; 296 case 'P': 297 prefix_builtins = 1; 298 break; 299 case 'Q': 300 quiet++; 301 break; 302 case 'R': 303 reload = optarg; 304 break; 305 case 's': 306 synch_lines = 1; 307 break; 308 case 't': 309 mark_traced(optarg, 1); 310 break; 311 case 'U': /* undefine... */ 312 macro_popdef(optarg); 313 break; 314 case 'v': 315 fprintf(stderr, "%s version %d\n", getprogname(), 316 VERSION); 317 return EXIT_SUCCESS; 318 case OPT_HELP: 319 help(); 320 return EXIT_SUCCESS; 321 case '?': 322 default: 323 usage(stderr); 324 return EXIT_FAILURE; 325 } 326 327 #ifdef REDIRECT 328 /* 329 * This is meant only for debugging; it makes all output 330 * go to a known file, even if the command line options 331 * send it elsewhere. It should not be turned of in production code. 332 */ 333 if (freopen("/tmp/m4", "w+", stderr) == NULL) 334 err(EXIT_FAILURE, "Can't redirect errors to `%s'", 335 "/tmp/m4"); 336 #endif 337 argc -= optind; 338 argv += optind; 339 340 341 initkwds(); 342 if (mimic_gnu) 343 setup_builtin("format", FORMATTYPE); 344 345 active = stdout; /* default active output */ 346 bbase[0] = bufbase; 347 348 if (reload) { 349 #ifdef REAL_FREEZE 350 thaw_state(reload); 351 #else 352 if (fopen_trypath(infile, reload) == NULL) 353 err(1, "Can't open `%s'", reload); 354 sp = -1; 355 fp = 0; 356 thawing = 1; 357 macro(); 358 thawing = 0; 359 release_input(infile); 360 #endif 361 } 362 363 if (!argc) { 364 sp = -1; /* stack pointer initialized */ 365 fp = 0; /* frame pointer initialized */ 366 set_input(infile+0, stdin, "stdin"); 367 /* default input (naturally) */ 368 macro(); 369 } else 370 for (; argc--; ++argv) { 371 p = *argv; 372 if (p[0] == '-' && p[1] == EOS) 373 set_input(infile, stdin, "stdin"); 374 else if (fopen_trypath(infile, p) == NULL) 375 err(1, "%s", p); 376 sp = -1; 377 fp = 0; 378 macro(); 379 release_input(infile); 380 } 381 382 if (wrapindex) { 383 int i; 384 385 ilevel = 0; /* in case m4wrap includes.. */ 386 bufbase = bp = buf; /* use the entire buffer */ 387 if (mimic_gnu) { 388 while (wrapindex != 0) { 389 for (i = 0; i < wrapindex; i++) 390 pbstr(m4wraps[i]); 391 wrapindex =0; 392 macro(); 393 } 394 } else { 395 for (i = 0; i < wrapindex; i++) { 396 pbstr(m4wraps[i]); 397 macro(); 398 } 399 } 400 } 401 402 if (active != stdout) 403 active = stdout; /* reset output just in case */ 404 for (n = 1; n < maxout; n++) /* default wrap-up: undivert */ 405 if (outfile[n] != NULL) 406 getdiv(n); 407 /* remove bitbucket if used */ 408 if (outfile[0] != NULL) { 409 (void) fclose(outfile[0]); 410 } 411 412 #ifdef REAL_FREEZE 413 if (freeze) 414 freeze_state(freeze); 415 #else 416 if (freezef) 417 fclose(freezef); 418 #endif 419 420 return 0; 421 } 422 423 /* 424 * Look ahead for `token'. 425 * (on input `t == token[0]') 426 * Used for comment and quoting delimiters. 427 * Returns 1 if `token' present; copied to output. 428 * 0 if `token' not found; all characters pushed back 429 */ 430 static int 431 do_look_ahead(int t, const char *token) 432 { 433 int i; 434 435 assert((unsigned char)t == (unsigned char)token[0]); 436 437 for (i = 1; *++token; i++) { 438 t = gpbc(); 439 if (t == EOF || (unsigned char)t != (unsigned char)*token) { 440 pushback(t); 441 while (--i) 442 pushback(*--token); 443 return 0; 444 } 445 } 446 return 1; 447 } 448 449 #define LOOK_AHEAD(t, token) (t != EOF && \ 450 (unsigned char)(t)==(unsigned char)(token)[0] && \ 451 do_look_ahead(t,token)) 452 453 /* 454 * macro - the work horse.. 455 */ 456 static void 457 macro(void) 458 { 459 char token[MAXTOK+1]; 460 int t, l; 461 ndptr p; 462 int nlpar; 463 464 cycle { 465 t = gpbc(); 466 467 if (LOOK_AHEAD(t,lquote)) { /* strip quotes */ 468 nlpar = 0; 469 record(quotes, nlpar++); 470 /* 471 * Opening quote: scan forward until matching 472 * closing quote has been found. 473 */ 474 do { 475 476 l = gpbc(); 477 if (LOOK_AHEAD(l,rquote)) { 478 if (--nlpar > 0) 479 outputstr(rquote); 480 } else if (LOOK_AHEAD(l,lquote)) { 481 record(quotes, nlpar++); 482 outputstr(lquote); 483 } else if (l == EOF) { 484 if (!quiet) { 485 if (nlpar == 1) 486 warnx("unclosed quote:"); 487 else 488 warnx( 489 "%d unclosed quotes:", 490 nlpar); 491 dump_stack(quotes, nlpar); 492 } 493 exit(EXIT_FAILURE); 494 } else { 495 if (nlpar > 0) { 496 if (sp < 0) 497 reallyputchar(l); 498 else 499 CHRSAVE(l); 500 } 501 } 502 } 503 while (nlpar != 0); 504 } else if (sp < 0 && LOOK_AHEAD(t, scommt)) { 505 reallyoutputstr(scommt); 506 507 for(;;) { 508 t = gpbc(); 509 if (LOOK_AHEAD(t, ecommt)) { 510 reallyoutputstr(ecommt); 511 break; 512 } 513 if (t == EOF) 514 break; 515 reallyputchar(t); 516 } 517 } else if (t == '_' || isalpha(t)) { 518 p = inspect(t, token); 519 if (p != NULL) 520 pushback(l = gpbc()); 521 if (p == NULL || (l != LPAREN && 522 (macro_getdef(p)->type & NEEDARGS) != 0)) 523 outputstr(token); 524 else { 525 /* 526 * real thing.. First build a call frame: 527 */ 528 pushf(fp); /* previous call frm */ 529 pushf(macro_getdef(p)->type); /* type of the call */ 530 pushf(is_traced(p)); 531 pushf(0); /* parenthesis level */ 532 fp = sp; /* new frame pointer */ 533 /* 534 * now push the string arguments: 535 */ 536 pushs1(macro_getdef(p)->defn); /* defn string */ 537 pushs1((char *)macro_name(p)); /* macro name */ 538 pushs(ep); /* start next..*/ 539 540 if (l != LPAREN && PARLEV == 0) { 541 /* no bracks */ 542 chrsave(EOS); 543 544 if ((size_t)sp == STACKMAX) 545 errx(1, "internal stack overflow"); 546 eval((const char **) mstack+fp+1, 2, 547 CALTYP, TRACESTATUS); 548 549 ep = PREVEP; /* flush strspace */ 550 sp = PREVSP; /* previous sp.. */ 551 fp = PREVFP; /* rewind stack...*/ 552 } 553 } 554 } else if (t == EOF) { 555 if (sp > -1 && ilevel <= 0) { 556 if (!quiet) { 557 warnx("unexpected end of input, " 558 "unclosed parenthesis:"); 559 dump_stack(paren, PARLEV); 560 } 561 exit(EXIT_FAILURE); 562 } 563 if (ilevel <= 0) 564 break; /* all done thanks.. */ 565 release_input(infile+ilevel--); 566 emit_synchline(); 567 bufbase = bbase[ilevel]; 568 continue; 569 } else if (sp < 0) { /* not in a macro at all */ 570 reallyputchar(t); /* output directly.. */ 571 } 572 573 else switch(t) { 574 575 case LPAREN: 576 if (PARLEV > 0) 577 chrsave(t); 578 while (isspace(l = gpbc())) /* skip blank, tab, nl.. */ 579 if (PARLEV > 0) 580 chrsave(l); 581 pushback(l); 582 record(paren, PARLEV++); 583 break; 584 585 case RPAREN: 586 if (--PARLEV > 0) 587 chrsave(t); 588 else { /* end of argument list */ 589 chrsave(EOS); 590 591 if ((size_t)sp == STACKMAX) 592 errx(1, "internal stack overflow"); 593 594 eval((const char **) mstack+fp+1, sp-fp, 595 CALTYP, TRACESTATUS); 596 597 ep = PREVEP; /* flush strspace */ 598 sp = PREVSP; /* previous sp.. */ 599 fp = PREVFP; /* rewind stack...*/ 600 } 601 break; 602 603 case COMMA: 604 if (PARLEV == 1) { 605 chrsave(EOS); /* new argument */ 606 while (isspace(l = gpbc())) 607 ; 608 pushback(l); 609 pushs(ep); 610 } else 611 chrsave(t); 612 break; 613 614 default: 615 if (LOOK_AHEAD(t, scommt)) { 616 char *q; 617 for (q = scommt; *q; q++) 618 chrsave(*q); 619 for(;;) { 620 t = gpbc(); 621 if (LOOK_AHEAD(t, ecommt)) { 622 for (q = ecommt; *q; q++) 623 chrsave(*q); 624 break; 625 } 626 if (t == EOF) 627 break; 628 CHRSAVE(t); 629 } 630 } else 631 CHRSAVE(t); /* stack the char */ 632 break; 633 } 634 } 635 } 636 637 /* 638 * output string directly, without pushing it for reparses. 639 */ 640 void 641 outputstr(const char *s) 642 { 643 if (sp < 0) 644 reallyoutputstr(s); 645 else 646 while (*s) 647 CHRSAVE(*s++); 648 } 649 650 void 651 reallyoutputstr(const char *s) 652 { 653 if (synch_lines) { 654 while (*s) { 655 fputc(*s, active); 656 if (*s++ == '\n') { 657 infile[ilevel].synch_lineno++; 658 if (infile[ilevel].synch_lineno != 659 infile[ilevel].lineno) 660 do_emit_synchline(); 661 } 662 } 663 } else 664 fputs(s, active); 665 } 666 667 void 668 reallyputchar(int c) 669 { 670 putc(c, active); 671 if (synch_lines && c == '\n') { 672 infile[ilevel].synch_lineno++; 673 if (infile[ilevel].synch_lineno != infile[ilevel].lineno) 674 do_emit_synchline(); 675 } 676 } 677 678 /* 679 * build an input token.. 680 * consider only those starting with _ or A-Za-z. 681 */ 682 static ndptr 683 inspect(int c, char *tp) 684 { 685 char *name = tp; 686 char *etp = tp+MAXTOK; 687 ndptr p; 688 689 *tp++ = c; 690 691 while ((isalnum(c = gpbc()) || c == '_') && tp < etp) 692 *tp++ = c; 693 if (c != EOF) 694 PUSHBACK(c); 695 *tp = EOS; 696 /* token is too long, it won't match anything, but it can still 697 * be output. */ 698 if (tp == ep) { 699 outputstr(name); 700 while (isalnum(c = gpbc()) || c == '_') { 701 if (sp < 0) 702 reallyputchar(c); 703 else 704 CHRSAVE(c); 705 } 706 *name = EOS; 707 return NULL; 708 } 709 710 p = ohash_find(¯os, ohash_qlookupi(¯os, name, (void *)&tp)); 711 if (p == NULL) 712 return NULL; 713 if (macro_getdef(p) == NULL) 714 return NULL; 715 return p; 716 } 717 718 /* 719 * initkwds - initialise m4 keywords as fast as possible. 720 * This very similar to install, but without certain overheads, 721 * such as calling lookup. Malloc is not used for storing the 722 * keyword strings, since we simply use the static pointers 723 * within keywrds block. 724 */ 725 static void 726 initkwds(void) 727 { 728 unsigned int type; 729 size_t i; 730 731 for (i = 0; i < MAXKEYS; i++) { 732 type = keywrds[i].ktyp; 733 if ((keywrds[i].ktyp & NOARGS) == 0) 734 type |= NEEDARGS; 735 setup_builtin(keywrds[i].knam, type); 736 } 737 } 738 739 static void 740 record(struct position *t, int lev) 741 { 742 if (lev < MAXRECORD) { 743 t[lev].name = CURRENT_NAME; 744 t[lev].line = CURRENT_LINE; 745 } 746 } 747 748 static void 749 dump_stack(struct position *t, int lev) 750 { 751 int i; 752 753 for (i = 0; i < lev; i++) { 754 if (i == MAXRECORD) { 755 fprintf(stderr, " ...\n"); 756 break; 757 } 758 fprintf(stderr, " %s at line %lu\n", 759 t[i].name, t[i].line); 760 } 761 } 762 763 764 static void 765 enlarge_stack(void) 766 { 767 STACKMAX += STACKMAX/2; 768 mstack = xrealloc(mstack, sizeof(stae) * STACKMAX, 769 "Evaluation stack overflow (%lu)", 770 (unsigned long)STACKMAX); 771 sstack = xrealloc(sstack, STACKMAX, 772 "Evaluation stack overflow (%lu)", 773 (unsigned long)STACKMAX); 774 } 775 776 static const struct { 777 const char *n; 778 const char *d; 779 } nd [] = { 780 { "-d, --debug[=flags]", "set debug flags" }, 781 { "-D, --define=name[=value]", "define macro" }, 782 { "-e, --error-output=file", "send error output to file" }, 783 { "-E, --fatal-warnings", "exit on warnings" }, 784 { "-F, --freeze-state=file", "save state to file" }, 785 { "-g, --gnu", "enable gnu extensions" }, 786 { " --help", "print this message and exit" }, 787 { "-I, --include=file", "include file" }, 788 { "-i, --interactive", "unbuffer output, ignore tty signals" }, 789 { "-L, --nesting-limit=num", "macro expansion nesting limit (unimpl)" }, 790 { "-P, --prefix-builtins", "prefix builtins with m4_" }, 791 { "-Q, --quiet", "don't print warnings" }, 792 { "-R, --reload-state=file", "restore state from file" }, 793 { "-Q, --silent", "don't print warnings" }, 794 { "-s, --synclines", "output line directives for cpp(1)" }, 795 { "-t, --trace=macro", "trace the named macro" }, 796 { "-G, --traditional", "disable gnu extensions" }, 797 { "-U, --undefine=name", "undefine the named macro" }, 798 { "-v, --version", "print the version number and exit" }, 799 }; 800 801 static void 802 help(void) 803 { 804 size_t i; 805 fprintf(stdout, "%s version %d\n\n", getprogname(), VERSION); 806 usage(stdout); 807 808 fprintf(stdout, "\nThe long options are:\n"); 809 for (i = 0; i < __arraycount(nd); i++) 810 fprintf(stdout, "\t%-25.25s\t%s\n", nd[i].n, nd[i].d); 811 } 812