1 /* $OpenBSD: main.c,v 1.77 2009/10/14 17:19:47 sthen Exp $ */ 2 /* $NetBSD: main.c,v 1.50 2020/06/25 02:25:53 uwe 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 1.50 2020/06/25 02:25:53 uwe 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, 'o' }, /* sic */ 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 int error; 231 char *p; 232 233 setprogname(argv[0]); 234 235 if (signal(SIGINT, SIG_IGN) != SIG_IGN) 236 signal(SIGINT, onintr); 237 238 init_macros(); 239 initspaces(); 240 STACKMAX = INITSTACKMAX; 241 242 mstack = (stae *)xalloc(sizeof(stae) * STACKMAX, NULL); 243 sstack = (char *)xalloc(STACKMAX, NULL); 244 245 maxout = 0; 246 outfile = NULL; 247 resizedivs(MAXOUT); 248 249 while ((c = getopt_long(argc, argv, "D:d:EF:GgI:iL:o:PR:Qst:U:v", 250 longopts, NULL)) != -1) 251 switch(c) { 252 case 'D': /* define something..*/ 253 for (p = optarg; *p; p++) 254 if (*p == '=') 255 break; 256 if (*p) 257 *p++ = EOS; 258 dodefine(optarg, p); 259 break; 260 case 'd': 261 set_trace_flags(optarg); 262 break; 263 case 'E': 264 fatal_warnings++; 265 break; 266 case 'F': 267 freeze = optarg; 268 #ifndef REAL_FREEZE 269 if ((freezef = fopen(freeze, "w")) == NULL) 270 err(EXIT_FAILURE, "Can't open `%s'", freeze); 271 #endif 272 break; 273 case 'I': 274 addtoincludepath(optarg); 275 break; 276 case 'i': 277 setvbuf(stdout, NULL, _IONBF, 0); 278 signal(SIGINT, SIG_IGN); 279 break; 280 case 'G': 281 mimic_gnu = 0; 282 break; 283 case 'g': 284 mimic_gnu = 1; 285 break; 286 case 'L': 287 nesting_limit = atoi(optarg); 288 break; 289 case 'o': 290 error = trace_file(optarg); 291 if (error) 292 warn("%s", optarg); 293 break; 294 case 'P': 295 prefix_builtins = 1; 296 break; 297 case 'Q': 298 quiet++; 299 break; 300 case 'R': 301 reload = optarg; 302 break; 303 case 's': 304 synch_lines = 1; 305 break; 306 case 't': 307 mark_traced(optarg, 1); 308 break; 309 case 'U': /* undefine... */ 310 macro_popdef(optarg); 311 break; 312 case 'v': 313 fprintf(stderr, "%s version %d\n", getprogname(), 314 VERSION); 315 return EXIT_SUCCESS; 316 case OPT_HELP: 317 help(); 318 return EXIT_SUCCESS; 319 case '?': 320 default: 321 usage(stderr); 322 return EXIT_FAILURE; 323 } 324 325 #ifdef REDIRECT 326 /* 327 * This is meant only for debugging; it makes all output 328 * go to a known file, even if the command line options 329 * send it elsewhere. It should not be turned of in production code. 330 */ 331 if (freopen("/tmp/m4", "w+", stderr) == NULL) 332 err(EXIT_FAILURE, "Can't redirect errors to `%s'", 333 "/tmp/m4"); 334 #endif 335 argc -= optind; 336 argv += optind; 337 338 339 initkwds(); 340 if (mimic_gnu) 341 setup_builtin("format", FORMATTYPE); 342 343 active = stdout; /* default active output */ 344 bbase[0] = bufbase; 345 346 if (reload) { 347 #ifdef REAL_FREEZE 348 thaw_state(reload); 349 #else 350 if (fopen_trypath(infile, reload) == NULL) 351 err(1, "Can't open `%s'", reload); 352 sp = -1; 353 fp = 0; 354 thawing = 1; 355 macro(); 356 thawing = 0; 357 release_input(infile); 358 #endif 359 } 360 361 if (!argc) { 362 sp = -1; /* stack pointer initialized */ 363 fp = 0; /* frame pointer initialized */ 364 set_input(infile+0, stdin, "stdin"); 365 /* default input (naturally) */ 366 macro(); 367 } else 368 for (; argc--; ++argv) { 369 p = *argv; 370 if (p[0] == '-' && p[1] == EOS) 371 set_input(infile, stdin, "stdin"); 372 else if (fopen_trypath(infile, p) == NULL) 373 err(1, "%s", p); 374 sp = -1; 375 fp = 0; 376 macro(); 377 release_input(infile); 378 } 379 380 if (wrapindex) { 381 int i; 382 383 ilevel = 0; /* in case m4wrap includes.. */ 384 bufbase = bp = buf; /* use the entire buffer */ 385 if (mimic_gnu) { 386 while (wrapindex != 0) { 387 for (i = 0; i < wrapindex; i++) 388 pbstr(m4wraps[i]); 389 wrapindex =0; 390 macro(); 391 } 392 } else { 393 for (i = 0; i < wrapindex; i++) { 394 pbstr(m4wraps[i]); 395 macro(); 396 } 397 } 398 } 399 400 if (active != stdout) 401 active = stdout; /* reset output just in case */ 402 for (n = 1; n < maxout; n++) /* default wrap-up: undivert */ 403 if (outfile[n] != NULL) 404 getdiv(n); 405 /* remove bitbucket if used */ 406 if (outfile[0] != NULL) { 407 (void) fclose(outfile[0]); 408 } 409 410 #ifdef REAL_FREEZE 411 if (freeze) 412 freeze_state(freeze); 413 #else 414 if (freezef) 415 fclose(freezef); 416 #endif 417 418 return 0; 419 } 420 421 /* 422 * Look ahead for `token'. 423 * (on input `t == token[0]') 424 * Used for comment and quoting delimiters. 425 * Returns 1 if `token' present; copied to output. 426 * 0 if `token' not found; all characters pushed back 427 */ 428 static int 429 do_look_ahead(int t, const char *token) 430 { 431 int i; 432 433 assert((unsigned char)t == (unsigned char)token[0]); 434 435 for (i = 1; *++token; i++) { 436 t = gpbc(); 437 if (t == EOF || (unsigned char)t != (unsigned char)*token) { 438 pushback(t); 439 while (--i) 440 pushback(*--token); 441 return 0; 442 } 443 } 444 return 1; 445 } 446 447 #define LOOK_AHEAD(t, token) (t != EOF && \ 448 (unsigned char)(t)==(unsigned char)(token)[0] && \ 449 do_look_ahead(t,token)) 450 451 /* 452 * macro - the work horse.. 453 */ 454 static void 455 macro(void) 456 { 457 char token[MAXTOK+1]; 458 int t, l; 459 ndptr p; 460 int nlpar; 461 462 cycle { 463 t = gpbc(); 464 465 if (LOOK_AHEAD(t,lquote)) { /* strip quotes */ 466 nlpar = 0; 467 record(quotes, nlpar++); 468 /* 469 * Opening quote: scan forward until matching 470 * closing quote has been found. 471 */ 472 do { 473 474 l = gpbc(); 475 if (LOOK_AHEAD(l,rquote)) { 476 if (--nlpar > 0) 477 outputstr(rquote); 478 } else if (LOOK_AHEAD(l,lquote)) { 479 record(quotes, nlpar++); 480 outputstr(lquote); 481 } else if (l == EOF) { 482 if (!quiet) { 483 if (nlpar == 1) 484 warnx("unclosed quote:"); 485 else 486 warnx( 487 "%d unclosed quotes:", 488 nlpar); 489 dump_stack(quotes, nlpar); 490 } 491 exit(EXIT_FAILURE); 492 } else { 493 if (nlpar > 0) { 494 if (sp < 0) 495 reallyputchar(l); 496 else 497 CHRSAVE(l); 498 } 499 } 500 } 501 while (nlpar != 0); 502 } else if (sp < 0 && LOOK_AHEAD(t, scommt)) { 503 reallyoutputstr(scommt); 504 505 for(;;) { 506 t = gpbc(); 507 if (LOOK_AHEAD(t, ecommt)) { 508 reallyoutputstr(ecommt); 509 break; 510 } 511 if (t == EOF) 512 break; 513 reallyputchar(t); 514 } 515 } else if (t == '_' || isalpha(t)) { 516 p = inspect(t, token); 517 if (p != NULL) 518 pushback(l = gpbc()); 519 if (p == NULL || (l != LPAREN && 520 (macro_getdef(p)->type & NEEDARGS) != 0)) 521 outputstr(token); 522 else { 523 /* 524 * real thing.. First build a call frame: 525 */ 526 pushf(fp); /* previous call frm */ 527 pushf(macro_getdef(p)->type); /* type of the call */ 528 pushf(is_traced(p)); 529 pushf(0); /* parenthesis level */ 530 fp = sp; /* new frame pointer */ 531 /* 532 * now push the string arguments: 533 * XXX: Copy the macro definition. This leaks, but too 534 * lazy to fix properly. 535 * The problem is that if we evaluate a pushdef'ed 536 * macro and then popdef it while it the definition 537 * is still on the stack we are going to reference 538 * free memory. 539 */ 540 pushs1(xstrdup(macro_getdef(p)->defn)); /* defn string */ 541 pushs1((char *)macro_name(p)); /* macro name */ 542 pushs(ep); /* start next..*/ 543 544 if (l != LPAREN && PARLEV == 0) { 545 /* no bracks */ 546 chrsave(EOS); 547 548 if ((size_t)sp == STACKMAX) 549 errx(1, "internal stack overflow"); 550 eval((const char **) mstack+fp+1, 2, 551 CALTYP, TRACESTATUS); 552 553 ep = PREVEP; /* flush strspace */ 554 sp = PREVSP; /* previous sp.. */ 555 fp = PREVFP; /* rewind stack...*/ 556 } 557 } 558 } else if (t == EOF) { 559 if (sp > -1 && ilevel <= 0) { 560 if (!quiet) { 561 warnx("unexpected end of input, " 562 "unclosed parenthesis:"); 563 dump_stack(paren, PARLEV); 564 } 565 exit(EXIT_FAILURE); 566 } 567 if (ilevel <= 0) 568 break; /* all done thanks.. */ 569 release_input(infile+ilevel--); 570 emit_synchline(); 571 bufbase = bbase[ilevel]; 572 continue; 573 } else if (sp < 0) { /* not in a macro at all */ 574 reallyputchar(t); /* output directly.. */ 575 } 576 577 else switch(t) { 578 579 case LPAREN: 580 if (PARLEV > 0) 581 chrsave(t); 582 while (isspace(l = gpbc())) /* skip blank, tab, nl.. */ 583 if (PARLEV > 0) 584 chrsave(l); 585 pushback(l); 586 record(paren, PARLEV++); 587 break; 588 589 case RPAREN: 590 if (--PARLEV > 0) 591 chrsave(t); 592 else { /* end of argument list */ 593 chrsave(EOS); 594 595 if ((size_t)sp == STACKMAX) 596 errx(1, "internal stack overflow"); 597 598 eval((const char **) mstack+fp+1, sp-fp, 599 CALTYP, TRACESTATUS); 600 601 ep = PREVEP; /* flush strspace */ 602 sp = PREVSP; /* previous sp.. */ 603 fp = PREVFP; /* rewind stack...*/ 604 } 605 break; 606 607 case COMMA: 608 if (PARLEV == 1) { 609 chrsave(EOS); /* new argument */ 610 while (isspace(l = gpbc())) 611 ; 612 pushback(l); 613 pushs(ep); 614 } else 615 chrsave(t); 616 break; 617 618 default: 619 if (LOOK_AHEAD(t, scommt)) { 620 char *q; 621 for (q = scommt; *q; q++) 622 chrsave(*q); 623 for(;;) { 624 t = gpbc(); 625 if (LOOK_AHEAD(t, ecommt)) { 626 for (q = ecommt; *q; q++) 627 chrsave(*q); 628 break; 629 } 630 if (t == EOF) 631 break; 632 CHRSAVE(t); 633 } 634 } else 635 CHRSAVE(t); /* stack the char */ 636 break; 637 } 638 } 639 } 640 641 /* 642 * output string directly, without pushing it for reparses. 643 */ 644 void 645 outputstr(const char *s) 646 { 647 if (sp < 0) 648 reallyoutputstr(s); 649 else 650 while (*s) 651 CHRSAVE(*s++); 652 } 653 654 void 655 reallyoutputstr(const char *s) 656 { 657 if (synch_lines) { 658 while (*s) { 659 fputc(*s, active); 660 if (*s++ == '\n') { 661 infile[ilevel].synch_lineno++; 662 if (infile[ilevel].synch_lineno != 663 infile[ilevel].lineno) 664 do_emit_synchline(); 665 } 666 } 667 } else 668 fputs(s, active); 669 } 670 671 void 672 reallyputchar(int c) 673 { 674 putc(c, active); 675 if (synch_lines && c == '\n') { 676 infile[ilevel].synch_lineno++; 677 if (infile[ilevel].synch_lineno != infile[ilevel].lineno) 678 do_emit_synchline(); 679 } 680 } 681 682 /* 683 * build an input token.. 684 * consider only those starting with _ or A-Za-z. 685 */ 686 static ndptr 687 inspect(int c, char *tp) 688 { 689 char *name = tp; 690 char *etp = tp+MAXTOK; 691 ndptr p; 692 693 *tp++ = c; 694 695 while ((isalnum(c = gpbc()) || c == '_') && tp < etp) 696 *tp++ = c; 697 if (c != EOF) 698 PUSHBACK(c); 699 *tp = EOS; 700 /* token is too long, it won't match anything, but it can still 701 * be output. */ 702 if (tp == ep) { 703 outputstr(name); 704 while (isalnum(c = gpbc()) || c == '_') { 705 if (sp < 0) 706 reallyputchar(c); 707 else 708 CHRSAVE(c); 709 } 710 *name = EOS; 711 return NULL; 712 } 713 714 p = ohash_find(¯os, ohash_qlookupi(¯os, name, (void *)&tp)); 715 if (p == NULL) 716 return NULL; 717 if (macro_getdef(p) == NULL) 718 return NULL; 719 return p; 720 } 721 722 /* 723 * initkwds - initialise m4 keywords as fast as possible. 724 * This very similar to install, but without certain overheads, 725 * such as calling lookup. Malloc is not used for storing the 726 * keyword strings, since we simply use the static pointers 727 * within keywrds block. 728 */ 729 static void 730 initkwds(void) 731 { 732 unsigned int type; 733 size_t i; 734 735 for (i = 0; i < MAXKEYS; i++) { 736 type = keywrds[i].ktyp; 737 if ((keywrds[i].ktyp & NOARGS) == 0) 738 type |= NEEDARGS; 739 setup_builtin(keywrds[i].knam, type); 740 } 741 } 742 743 static void 744 record(struct position *t, int lev) 745 { 746 if (lev < MAXRECORD) { 747 t[lev].name = CURRENT_NAME; 748 t[lev].line = CURRENT_LINE; 749 } 750 } 751 752 static void 753 dump_stack(struct position *t, int lev) 754 { 755 int i; 756 757 for (i = 0; i < lev; i++) { 758 if (i == MAXRECORD) { 759 fprintf(stderr, " ...\n"); 760 break; 761 } 762 fprintf(stderr, " %s at line %lu\n", 763 t[i].name, t[i].line); 764 } 765 } 766 767 768 static void 769 enlarge_stack(void) 770 { 771 STACKMAX += STACKMAX/2; 772 mstack = xrealloc(mstack, sizeof(stae) * STACKMAX, 773 "Evaluation stack overflow (%lu)", 774 (unsigned long)STACKMAX); 775 sstack = xrealloc(sstack, STACKMAX, 776 "Evaluation stack overflow (%lu)", 777 (unsigned long)STACKMAX); 778 } 779 780 static const struct { 781 const char *n; 782 const char *d; 783 } nd [] = { 784 { "-d, --debug[=flags]", "set debug flags" }, 785 { "-D, --define=name[=value]", "define macro" }, 786 { "-e, --error-output=file", "send error output to file" }, 787 { "-E, --fatal-warnings", "exit on warnings" }, 788 { "-F, --freeze-state=file", "save state to file" }, 789 { "-g, --gnu", "enable gnu extensions" }, 790 { " --help", "print this message and exit" }, 791 { "-I, --include=file", "include file" }, 792 { "-i, --interactive", "unbuffer output, ignore tty signals" }, 793 { "-L, --nesting-limit=num", "macro expansion nesting limit (unimpl)" }, 794 { "-P, --prefix-builtins", "prefix builtins with m4_" }, 795 { "-Q, --quiet", "don't print warnings" }, 796 { "-R, --reload-state=file", "restore state from file" }, 797 { "-Q, --silent", "don't print warnings" }, 798 { "-s, --synclines", "output line directives for cpp(1)" }, 799 { "-t, --trace=macro", "trace the named macro" }, 800 { "-G, --traditional", "disable gnu extensions" }, 801 { "-U, --undefine=name", "undefine the named macro" }, 802 { "-v, --version", "print the version number and exit" }, 803 }; 804 805 static void 806 help(void) 807 { 808 size_t i; 809 fprintf(stdout, "%s version %d\n\n", getprogname(), VERSION); 810 usage(stdout); 811 812 fprintf(stdout, "\nThe long options are:\n"); 813 for (i = 0; i < __arraycount(nd); i++) 814 fprintf(stdout, "\t%-25.25s\t%s\n", nd[i].n, nd[i].d); 815 } 816
Indexes created Sat Sep 20 22:09:52 GMT 2025