1/* Getopt for GNU. 2 NOTE: getopt is part of the C library, so if you don't know what 3 "Keep this file name-space clean" means, talk to drepper@gnu.org 4 before changing it! 5 Copyright (C) 1987-1996, 1998-2004, 2006, 2008-2012 Free Software 6 Foundation, Inc. 7 This file is part of the GNU C Library. 8 9 This program is free software: you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 3 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 21 22#ifndef _LIBC 23# include <config.h> 24#endif 25 26#include "getopt.h" 27 28#include <stdio.h> 29#include <stdlib.h> 30#include <string.h> 31#include <unistd.h> 32 33#ifdef _LIBC 34# include <libintl.h> 35#else 36# include "gettext.h" 37# define _(msgid) gettext (msgid) 38#endif 39 40#if defined _LIBC && defined USE_IN_LIBIO 41# include <wchar.h> 42#endif 43 44/* This version of 'getopt' appears to the caller like standard Unix 'getopt' 45 but it behaves differently for the user, since it allows the user 46 to intersperse the options with the other arguments. 47 48 As 'getopt_long' works, it permutes the elements of ARGV so that, 49 when it is done, all the options precede everything else. Thus 50 all application programs are extended to handle flexible argument order. 51 52 Using 'getopt' or setting the environment variable POSIXLY_CORRECT 53 disables permutation. 54 Then the behavior is completely standard. 55 56 GNU application programs can use a third alternative mode in which 57 they can distinguish the relative order of options and other arguments. */ 58 59#include "getopt_int.h" 60 61/* For communication from 'getopt' to the caller. 62 When 'getopt' finds an option that takes an argument, 63 the argument value is returned here. 64 Also, when 'ordering' is RETURN_IN_ORDER, 65 each non-option ARGV-element is returned here. */ 66 67char *optarg; 68 69/* Index in ARGV of the next element to be scanned. 70 This is used for communication to and from the caller 71 and for communication between successive calls to 'getopt'. 72 73 On entry to 'getopt', zero means this is the first call; initialize. 74 75 When 'getopt' returns -1, this is the index of the first of the 76 non-option elements that the caller should itself scan. 77 78 Otherwise, 'optind' communicates from one call to the next 79 how much of ARGV has been scanned so far. */ 80 81/* 1003.2 says this must be 1 before any call. */ 82int optind = 1; 83 84/* Callers store zero here to inhibit the error message 85 for unrecognized options. */ 86 87int opterr = 1; 88 89/* Set to an option character which was unrecognized. 90 This must be initialized on some systems to avoid linking in the 91 system's own getopt implementation. */ 92 93int optopt = '?'; 94 95/* Keep a global copy of all internal members of getopt_data. */ 96 97static struct _getopt_data getopt_data; 98 99 100#if defined HAVE_DECL_GETENV && !HAVE_DECL_GETENV 101extern char *getenv (); 102#endif 103 104#ifdef _LIBC 105/* Stored original parameters. 106 XXX This is no good solution. We should rather copy the args so 107 that we can compare them later. But we must not use malloc(3). */ 108extern int __libc_argc; 109extern char **__libc_argv; 110 111/* Bash 2.0 gives us an environment variable containing flags 112 indicating ARGV elements that should not be considered arguments. */ 113 114# ifdef USE_NONOPTION_FLAGS 115/* Defined in getopt_init.c */ 116extern char *__getopt_nonoption_flags; 117# endif 118 119# ifdef USE_NONOPTION_FLAGS 120# define SWAP_FLAGS(ch1, ch2) \ 121 if (d->__nonoption_flags_len > 0) \ 122 { \ 123 char __tmp = __getopt_nonoption_flags[ch1]; \ 124 __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \ 125 __getopt_nonoption_flags[ch2] = __tmp; \ 126 } 127# else 128# define SWAP_FLAGS(ch1, ch2) 129# endif 130#else /* !_LIBC */ 131# define SWAP_FLAGS(ch1, ch2) 132#endif /* _LIBC */ 133 134/* Exchange two adjacent subsequences of ARGV. 135 One subsequence is elements [first_nonopt,last_nonopt) 136 which contains all the non-options that have been skipped so far. 137 The other is elements [last_nonopt,optind), which contains all 138 the options processed since those non-options were skipped. 139 140 'first_nonopt' and 'last_nonopt' are relocated so that they describe 141 the new indices of the non-options in ARGV after they are moved. */ 142 143static void 144exchange (char **argv, struct _getopt_data *d) 145{ 146 int bottom = d->__first_nonopt; 147 int middle = d->__last_nonopt; 148 int top = d->optind; 149 char *tem; 150 151 /* Exchange the shorter segment with the far end of the longer segment. 152 That puts the shorter segment into the right place. 153 It leaves the longer segment in the right place overall, 154 but it consists of two parts that need to be swapped next. */ 155 156#if defined _LIBC && defined USE_NONOPTION_FLAGS 157 /* First make sure the handling of the '__getopt_nonoption_flags' 158 string can work normally. Our top argument must be in the range 159 of the string. */ 160 if (d->__nonoption_flags_len > 0 && top >= d->__nonoption_flags_max_len) 161 { 162 /* We must extend the array. The user plays games with us and 163 presents new arguments. */ 164 char *new_str = malloc (top + 1); 165 if (new_str == NULL) 166 d->__nonoption_flags_len = d->__nonoption_flags_max_len = 0; 167 else 168 { 169 memset (__mempcpy (new_str, __getopt_nonoption_flags, 170 d->__nonoption_flags_max_len), 171 '\0', top + 1 - d->__nonoption_flags_max_len); 172 d->__nonoption_flags_max_len = top + 1; 173 __getopt_nonoption_flags = new_str; 174 } 175 } 176#endif 177 178 while (top > middle && middle > bottom) 179 { 180 if (top - middle > middle - bottom) 181 { 182 /* Bottom segment is the short one. */ 183 int len = middle - bottom; 184 register int i; 185 186 /* Swap it with the top part of the top segment. */ 187 for (i = 0; i < len; i++) 188 { 189 tem = argv[bottom + i]; 190 argv[bottom + i] = argv[top - (middle - bottom) + i]; 191 argv[top - (middle - bottom) + i] = tem; 192 SWAP_FLAGS (bottom + i, top - (middle - bottom) + i); 193 } 194 /* Exclude the moved bottom segment from further swapping. */ 195 top -= len; 196 } 197 else 198 { 199 /* Top segment is the short one. */ 200 int len = top - middle; 201 register int i; 202 203 /* Swap it with the bottom part of the bottom segment. */ 204 for (i = 0; i < len; i++) 205 { 206 tem = argv[bottom + i]; 207 argv[bottom + i] = argv[middle + i]; 208 argv[middle + i] = tem; 209 SWAP_FLAGS (bottom + i, middle + i); 210 } 211 /* Exclude the moved top segment from further swapping. */ 212 bottom += len; 213 } 214 } 215 216 /* Update records for the slots the non-options now occupy. */ 217 218 d->__first_nonopt += (d->optind - d->__last_nonopt); 219 d->__last_nonopt = d->optind; 220} 221 222/* Initialize the internal data when the first call is made. */ 223 224static const char * 225_getopt_initialize (int argc _GL_UNUSED, 226 char **argv _GL_UNUSED, const char *optstring, 227 struct _getopt_data *d, int posixly_correct) 228{ 229 /* Start processing options with ARGV-element 1 (since ARGV-element 0 230 is the program name); the sequence of previously skipped 231 non-option ARGV-elements is empty. */ 232 233 d->__first_nonopt = d->__last_nonopt = d->optind; 234 235 d->__nextchar = NULL; 236 237 d->__posixly_correct = posixly_correct || !!getenv ("POSIXLY_CORRECT"); 238 239 /* Determine how to handle the ordering of options and nonoptions. */ 240 241 if (optstring[0] == '-') 242 { 243 d->__ordering = RETURN_IN_ORDER; 244 ++optstring; 245 } 246 else if (optstring[0] == '+') 247 { 248 d->__ordering = REQUIRE_ORDER; 249 ++optstring; 250 } 251 else if (d->__posixly_correct) 252 d->__ordering = REQUIRE_ORDER; 253 else 254 d->__ordering = PERMUTE; 255 256#if defined _LIBC && defined USE_NONOPTION_FLAGS 257 if (!d->__posixly_correct 258 && argc == __libc_argc && argv == __libc_argv) 259 { 260 if (d->__nonoption_flags_max_len == 0) 261 { 262 if (__getopt_nonoption_flags == NULL 263 || __getopt_nonoption_flags[0] == '\0') 264 d->__nonoption_flags_max_len = -1; 265 else 266 { 267 const char *orig_str = __getopt_nonoption_flags; 268 int len = d->__nonoption_flags_max_len = strlen (orig_str); 269 if (d->__nonoption_flags_max_len < argc) 270 d->__nonoption_flags_max_len = argc; 271 __getopt_nonoption_flags = 272 (char *) malloc (d->__nonoption_flags_max_len); 273 if (__getopt_nonoption_flags == NULL) 274 d->__nonoption_flags_max_len = -1; 275 else 276 memset (__mempcpy (__getopt_nonoption_flags, orig_str, len), 277 '\0', d->__nonoption_flags_max_len - len); 278 } 279 } 280 d->__nonoption_flags_len = d->__nonoption_flags_max_len; 281 } 282 else 283 d->__nonoption_flags_len = 0; 284#endif 285 286 return optstring; 287} 288 289/* Scan elements of ARGV (whose length is ARGC) for option characters 290 given in OPTSTRING. 291 292 If an element of ARGV starts with '-', and is not exactly "-" or "--", 293 then it is an option element. The characters of this element 294 (aside from the initial '-') are option characters. If 'getopt' 295 is called repeatedly, it returns successively each of the option characters 296 from each of the option elements. 297 298 If 'getopt' finds another option character, it returns that character, 299 updating 'optind' and 'nextchar' so that the next call to 'getopt' can 300 resume the scan with the following option character or ARGV-element. 301 302 If there are no more option characters, 'getopt' returns -1. 303 Then 'optind' is the index in ARGV of the first ARGV-element 304 that is not an option. (The ARGV-elements have been permuted 305 so that those that are not options now come last.) 306 307 OPTSTRING is a string containing the legitimate option characters. 308 If an option character is seen that is not listed in OPTSTRING, 309 return '?' after printing an error message. If you set 'opterr' to 310 zero, the error message is suppressed but we still return '?'. 311 312 If a char in OPTSTRING is followed by a colon, that means it wants an arg, 313 so the following text in the same ARGV-element, or the text of the following 314 ARGV-element, is returned in 'optarg'. Two colons mean an option that 315 wants an optional arg; if there is text in the current ARGV-element, 316 it is returned in 'optarg', otherwise 'optarg' is set to zero. 317 318 If OPTSTRING starts with '-' or '+', it requests different methods of 319 handling the non-option ARGV-elements. 320 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above. 321 322 Long-named options begin with '--' instead of '-'. 323 Their names may be abbreviated as long as the abbreviation is unique 324 or is an exact match for some defined option. If they have an 325 argument, it follows the option name in the same ARGV-element, separated 326 from the option name by a '=', or else the in next ARGV-element. 327 When 'getopt' finds a long-named option, it returns 0 if that option's 328 'flag' field is nonzero, the value of the option's 'val' field 329 if the 'flag' field is zero. 330 331 The elements of ARGV aren't really const, because we permute them. 332 But we pretend they're const in the prototype to be compatible 333 with other systems. 334 335 LONGOPTS is a vector of 'struct option' terminated by an 336 element containing a name which is zero. 337 338 LONGIND returns the index in LONGOPT of the long-named option found. 339 It is only valid when a long-named option has been found by the most 340 recent call. 341 342 If LONG_ONLY is nonzero, '-' as well as '--' can introduce 343 long-named options. */ 344 345int 346_getopt_internal_r (int argc, char **argv, const char *optstring, 347 const struct option *longopts, int *longind, 348 int long_only, struct _getopt_data *d, int posixly_correct) 349{ 350 int print_errors = d->opterr; 351 352 if (argc < 1) 353 return -1; 354 355 d->optarg = NULL; 356 357 if (d->optind == 0 || !d->__initialized) 358 { 359 if (d->optind == 0) 360 d->optind = 1; /* Don't scan ARGV[0], the program name. */ 361 optstring = _getopt_initialize (argc, argv, optstring, d, 362 posixly_correct); 363 d->__initialized = 1; 364 } 365 else if (optstring[0] == '-' || optstring[0] == '+') 366 optstring++; 367 if (optstring[0] == ':') 368 print_errors = 0; 369 370 /* Test whether ARGV[optind] points to a non-option argument. 371 Either it does not have option syntax, or there is an environment flag 372 from the shell indicating it is not an option. The later information 373 is only used when the used in the GNU libc. */ 374#if defined _LIBC && defined USE_NONOPTION_FLAGS 375# define NONOPTION_P (argv[d->optind][0] != '-' || argv[d->optind][1] == '\0' \ 376 || (d->optind < d->__nonoption_flags_len \ 377 && __getopt_nonoption_flags[d->optind] == '1')) 378#else 379# define NONOPTION_P (argv[d->optind][0] != '-' || argv[d->optind][1] == '\0') 380#endif 381 382 if (d->__nextchar == NULL || *d->__nextchar == '\0') 383 { 384 /* Advance to the next ARGV-element. */ 385 386 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been 387 moved back by the user (who may also have changed the arguments). */ 388 if (d->__last_nonopt > d->optind) 389 d->__last_nonopt = d->optind; 390 if (d->__first_nonopt > d->optind) 391 d->__first_nonopt = d->optind; 392 393 if (d->__ordering == PERMUTE) 394 { 395 /* If we have just processed some options following some non-options, 396 exchange them so that the options come first. */ 397 398 if (d->__first_nonopt != d->__last_nonopt 399 && d->__last_nonopt != d->optind) 400 exchange ((char **) argv, d); 401 else if (d->__last_nonopt != d->optind) 402 d->__first_nonopt = d->optind; 403 404 /* Skip any additional non-options 405 and extend the range of non-options previously skipped. */ 406 407 while (d->optind < argc && NONOPTION_P) 408 d->optind++; 409 d->__last_nonopt = d->optind; 410 } 411 412 /* The special ARGV-element '--' means premature end of options. 413 Skip it like a null option, 414 then exchange with previous non-options as if it were an option, 415 then skip everything else like a non-option. */ 416 417 if (d->optind != argc && !strcmp (argv[d->optind], "--")) 418 { 419 d->optind++; 420 421 if (d->__first_nonopt != d->__last_nonopt 422 && d->__last_nonopt != d->optind) 423 exchange ((char **) argv, d); 424 else if (d->__first_nonopt == d->__last_nonopt) 425 d->__first_nonopt = d->optind; 426 d->__last_nonopt = argc; 427 428 d->optind = argc; 429 } 430 431 /* If we have done all the ARGV-elements, stop the scan 432 and back over any non-options that we skipped and permuted. */ 433 434 if (d->optind == argc) 435 { 436 /* Set the next-arg-index to point at the non-options 437 that we previously skipped, so the caller will digest them. */ 438 if (d->__first_nonopt != d->__last_nonopt) 439 d->optind = d->__first_nonopt; 440 return -1; 441 } 442 443 /* If we have come to a non-option and did not permute it, 444 either stop the scan or describe it to the caller and pass it by. */ 445 446 if (NONOPTION_P) 447 { 448 if (d->__ordering == REQUIRE_ORDER) 449 return -1; 450 d->optarg = argv[d->optind++]; 451 return 1; 452 } 453 454 /* We have found another option-ARGV-element. 455 Skip the initial punctuation. */ 456 457 d->__nextchar = (argv[d->optind] + 1 458 + (longopts != NULL && argv[d->optind][1] == '-')); 459 } 460 461 /* Decode the current option-ARGV-element. */ 462 463 /* Check whether the ARGV-element is a long option. 464 465 If long_only and the ARGV-element has the form "-f", where f is 466 a valid short option, don't consider it an abbreviated form of 467 a long option that starts with f. Otherwise there would be no 468 way to give the -f short option. 469 470 On the other hand, if there's a long option "fubar" and 471 the ARGV-element is "-fu", do consider that an abbreviation of 472 the long option, just like "--fu", and not "-f" with arg "u". 473 474 This distinction seems to be the most useful approach. */ 475 476 if (longopts != NULL 477 && (argv[d->optind][1] == '-' 478 || (long_only && (argv[d->optind][2] 479 || !strchr (optstring, argv[d->optind][1]))))) 480 { 481 char *nameend; 482 unsigned int namelen; 483 const struct option *p; 484 const struct option *pfound = NULL; 485 struct option_list 486 { 487 const struct option *p; 488 struct option_list *next; 489 } *ambig_list = NULL; 490 int exact = 0; 491 int indfound = -1; 492 int option_index; 493 494 for (nameend = d->__nextchar; *nameend && *nameend != '='; nameend++) 495 /* Do nothing. */ ; 496 namelen = nameend - d->__nextchar; 497 498 /* Test all long options for either exact match 499 or abbreviated matches. */ 500 for (p = longopts, option_index = 0; p->name; p++, option_index++) 501 if (!strncmp (p->name, d->__nextchar, namelen)) 502 { 503 if (namelen == (unsigned int) strlen (p->name)) 504 { 505 /* Exact match found. */ 506 pfound = p; 507 indfound = option_index; 508 exact = 1; 509 break; 510 } 511 else if (pfound == NULL) 512 { 513 /* First nonexact match found. */ 514 pfound = p; 515 indfound = option_index; 516 } 517 else if (long_only 518 || pfound->has_arg != p->has_arg 519 || pfound->flag != p->flag 520 || pfound->val != p->val) 521 { 522 /* Second or later nonexact match found. */ 523 struct option_list *newp = malloc (sizeof (*newp)); 524 newp->p = p; 525 newp->next = ambig_list; 526 ambig_list = newp; 527 } 528 } 529 530 if (ambig_list != NULL && !exact) 531 { 532 if (print_errors) 533 { 534 struct option_list first; 535 first.p = pfound; 536 first.next = ambig_list; 537 ambig_list = &first; 538 539#if defined _LIBC && defined USE_IN_LIBIO 540 char *buf = NULL; 541 size_t buflen = 0; 542 543 FILE *fp = open_memstream (&buf, &buflen); 544 if (fp != NULL) 545 { 546 fprintf (fp, 547 _("%s: option '%s' is ambiguous; possibilities:"), 548 argv[0], argv[d->optind]); 549 550 do 551 { 552 fprintf (fp, " '--%s'", ambig_list->p->name); 553 ambig_list = ambig_list->next; 554 } 555 while (ambig_list != NULL); 556 557 fputc_unlocked ('\n', fp); 558 559 if (__builtin_expect (fclose (fp) != EOF, 1)) 560 { 561 _IO_flockfile (stderr); 562 563 int old_flags2 = ((_IO_FILE *) stderr)->_flags2; 564 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL; 565 566 __fxprintf (NULL, "%s", buf); 567 568 ((_IO_FILE *) stderr)->_flags2 = old_flags2; 569 _IO_funlockfile (stderr); 570 571 free (buf); 572 } 573 } 574#else 575 fprintf (stderr, 576 _("%s: option '%s' is ambiguous; possibilities:"), 577 argv[0], argv[d->optind]); 578 do 579 { 580 fprintf (stderr, " '--%s'", ambig_list->p->name); 581 ambig_list = ambig_list->next; 582 } 583 while (ambig_list != NULL); 584 585 fputc ('\n', stderr); 586#endif 587 } 588 d->__nextchar += strlen (d->__nextchar); 589 d->optind++; 590 d->optopt = 0; 591 return '?'; 592 } 593 594 while (ambig_list != NULL) 595 { 596 struct option_list *pn = ambig_list->next; 597 free (ambig_list); 598 ambig_list = pn; 599 } 600 601 if (pfound != NULL) 602 { 603 option_index = indfound; 604 d->optind++; 605 if (*nameend) 606 { 607 /* Don't test has_arg with >, because some C compilers don't 608 allow it to be used on enums. */ 609 if (pfound->has_arg) 610 d->optarg = nameend + 1; 611 else 612 { 613 if (print_errors) 614 { 615#if defined _LIBC && defined USE_IN_LIBIO 616 char *buf; 617 int n; 618#endif 619 620 if (argv[d->optind - 1][1] == '-') 621 { 622 /* --option */ 623#if defined _LIBC && defined USE_IN_LIBIO 624 n = __asprintf (&buf, _("\ 625%s: option '--%s' doesn't allow an argument\n"), 626 argv[0], pfound->name); 627#else 628 fprintf (stderr, _("\ 629%s: option '--%s' doesn't allow an argument\n"), 630 argv[0], pfound->name); 631#endif 632 } 633 else 634 { 635 /* +option or -option */ 636#if defined _LIBC && defined USE_IN_LIBIO 637 n = __asprintf (&buf, _("\ 638%s: option '%c%s' doesn't allow an argument\n"), 639 argv[0], argv[d->optind - 1][0], 640 pfound->name); 641#else 642 fprintf (stderr, _("\ 643%s: option '%c%s' doesn't allow an argument\n"), 644 argv[0], argv[d->optind - 1][0], 645 pfound->name); 646#endif 647 } 648 649#if defined _LIBC && defined USE_IN_LIBIO 650 if (n >= 0) 651 { 652 _IO_flockfile (stderr); 653 654 int old_flags2 = ((_IO_FILE *) stderr)->_flags2; 655 ((_IO_FILE *) stderr)->_flags2 656 |= _IO_FLAGS2_NOTCANCEL; 657 658 __fxprintf (NULL, "%s", buf); 659 660 ((_IO_FILE *) stderr)->_flags2 = old_flags2; 661 _IO_funlockfile (stderr); 662 663 free (buf); 664 } 665#endif 666 } 667 668 d->__nextchar += strlen (d->__nextchar); 669 670 d->optopt = pfound->val; 671 return '?'; 672 } 673 } 674 else if (pfound->has_arg == 1) 675 { 676 if (d->optind < argc) 677 d->optarg = argv[d->optind++]; 678 else 679 { 680 if (print_errors) 681 { 682#if defined _LIBC && defined USE_IN_LIBIO 683 char *buf; 684 685 if (__asprintf (&buf, _("\ 686%s: option '--%s' requires an argument\n"), 687 argv[0], pfound->name) >= 0) 688 { 689 _IO_flockfile (stderr); 690 691 int old_flags2 = ((_IO_FILE *) stderr)->_flags2; 692 ((_IO_FILE *) stderr)->_flags2 693 |= _IO_FLAGS2_NOTCANCEL; 694 695 __fxprintf (NULL, "%s", buf); 696 697 ((_IO_FILE *) stderr)->_flags2 = old_flags2; 698 _IO_funlockfile (stderr); 699 700 free (buf); 701 } 702#else 703 fprintf (stderr, 704 _("%s: option '--%s' requires an argument\n"), 705 argv[0], pfound->name); 706#endif 707 } 708 d->__nextchar += strlen (d->__nextchar); 709 d->optopt = pfound->val; 710 return optstring[0] == ':' ? ':' : '?'; 711 } 712 } 713 d->__nextchar += strlen (d->__nextchar); 714 if (longind != NULL) 715 *longind = option_index; 716 if (pfound->flag) 717 { 718 *(pfound->flag) = pfound->val; 719 return 0; 720 } 721 return pfound->val; 722 } 723 724 /* Can't find it as a long option. If this is not getopt_long_only, 725 or the option starts with '--' or is not a valid short 726 option, then it's an error. 727 Otherwise interpret it as a short option. */ 728 if (!long_only || argv[d->optind][1] == '-' 729 || strchr (optstring, *d->__nextchar) == NULL) 730 { 731 if (print_errors) 732 { 733#if defined _LIBC && defined USE_IN_LIBIO 734 char *buf; 735 int n; 736#endif 737 738 if (argv[d->optind][1] == '-') 739 { 740 /* --option */ 741#if defined _LIBC && defined USE_IN_LIBIO 742 n = __asprintf (&buf, _("%s: unrecognized option '--%s'\n"), 743 argv[0], d->__nextchar); 744#else 745 fprintf (stderr, _("%s: unrecognized option '--%s'\n"), 746 argv[0], d->__nextchar); 747#endif 748 } 749 else 750 { 751 /* +option or -option */ 752#if defined _LIBC && defined USE_IN_LIBIO 753 n = __asprintf (&buf, _("%s: unrecognized option '%c%s'\n"), 754 argv[0], argv[d->optind][0], d->__nextchar); 755#else 756 fprintf (stderr, _("%s: unrecognized option '%c%s'\n"), 757 argv[0], argv[d->optind][0], d->__nextchar); 758#endif 759 } 760 761#if defined _LIBC && defined USE_IN_LIBIO 762 if (n >= 0) 763 { 764 _IO_flockfile (stderr); 765 766 int old_flags2 = ((_IO_FILE *) stderr)->_flags2; 767 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL; 768 769 __fxprintf (NULL, "%s", buf); 770 771 ((_IO_FILE *) stderr)->_flags2 = old_flags2; 772 _IO_funlockfile (stderr); 773 774 free (buf); 775 } 776#endif 777 } 778 d->__nextchar = (char *) ""; 779 d->optind++; 780 d->optopt = 0; 781 return '?'; 782 } 783 } 784 785 /* Look at and handle the next short option-character. */ 786 787 { 788 char c = *d->__nextchar++; 789 const char *temp = strchr (optstring, c); 790 791 /* Increment 'optind' when we start to process its last character. */ 792 if (*d->__nextchar == '\0') 793 ++d->optind; 794 795 if (temp == NULL || c == ':' || c == ';') 796 { 797 if (print_errors) 798 { 799#if defined _LIBC && defined USE_IN_LIBIO 800 char *buf; 801 int n; 802#endif 803 804#if defined _LIBC && defined USE_IN_LIBIO 805 n = __asprintf (&buf, _("%s: invalid option -- '%c'\n"), 806 argv[0], c); 807#else 808 fprintf (stderr, _("%s: invalid option -- '%c'\n"), argv[0], c); 809#endif 810 811#if defined _LIBC && defined USE_IN_LIBIO 812 if (n >= 0) 813 { 814 _IO_flockfile (stderr); 815 816 int old_flags2 = ((_IO_FILE *) stderr)->_flags2; 817 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL; 818 819 __fxprintf (NULL, "%s", buf); 820 821 ((_IO_FILE *) stderr)->_flags2 = old_flags2; 822 _IO_funlockfile (stderr); 823 824 free (buf); 825 } 826#endif 827 } 828 d->optopt = c; 829 return '?'; 830 } 831 /* Convenience. Treat POSIX -W foo same as long option --foo */ 832 if (temp[0] == 'W' && temp[1] == ';') 833 { 834 char *nameend; 835 const struct option *p; 836 const struct option *pfound = NULL; 837 int exact = 0; 838 int ambig = 0; 839 int indfound = 0; 840 int option_index; 841 842 if (longopts == NULL) 843 goto no_longs; 844 845 /* This is an option that requires an argument. */ 846 if (*d->__nextchar != '\0') 847 { 848 d->optarg = d->__nextchar; 849 /* If we end this ARGV-element by taking the rest as an arg, 850 we must advance to the next element now. */ 851 d->optind++; 852 } 853 else if (d->optind == argc) 854 { 855 if (print_errors) 856 { 857#if defined _LIBC && defined USE_IN_LIBIO 858 char *buf; 859 860 if (__asprintf (&buf, 861 _("%s: option requires an argument -- '%c'\n"), 862 argv[0], c) >= 0) 863 { 864 _IO_flockfile (stderr); 865 866 int old_flags2 = ((_IO_FILE *) stderr)->_flags2; 867 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL; 868 869 __fxprintf (NULL, "%s", buf); 870 871 ((_IO_FILE *) stderr)->_flags2 = old_flags2; 872 _IO_funlockfile (stderr); 873 874 free (buf); 875 } 876#else 877 fprintf (stderr, 878 _("%s: option requires an argument -- '%c'\n"), 879 argv[0], c); 880#endif 881 } 882 d->optopt = c; 883 if (optstring[0] == ':') 884 c = ':'; 885 else 886 c = '?'; 887 return c; 888 } 889 else 890 /* We already incremented 'd->optind' once; 891 increment it again when taking next ARGV-elt as argument. */ 892 d->optarg = argv[d->optind++]; 893 894 /* optarg is now the argument, see if it's in the 895 table of longopts. */ 896 897 for (d->__nextchar = nameend = d->optarg; *nameend && *nameend != '='; 898 nameend++) 899 /* Do nothing. */ ; 900 901 /* Test all long options for either exact match 902 or abbreviated matches. */ 903 for (p = longopts, option_index = 0; p->name; p++, option_index++) 904 if (!strncmp (p->name, d->__nextchar, nameend - d->__nextchar)) 905 { 906 if ((unsigned int) (nameend - d->__nextchar) == strlen (p->name)) 907 { 908 /* Exact match found. */ 909 pfound = p; 910 indfound = option_index; 911 exact = 1; 912 break; 913 } 914 else if (pfound == NULL) 915 { 916 /* First nonexact match found. */ 917 pfound = p; 918 indfound = option_index; 919 } 920 else if (long_only 921 || pfound->has_arg != p->has_arg 922 || pfound->flag != p->flag 923 || pfound->val != p->val) 924 /* Second or later nonexact match found. */ 925 ambig = 1; 926 } 927 if (ambig && !exact) 928 { 929 if (print_errors) 930 { 931#if defined _LIBC && defined USE_IN_LIBIO 932 char *buf; 933 934 if (__asprintf (&buf, _("%s: option '-W %s' is ambiguous\n"), 935 argv[0], d->optarg) >= 0) 936 { 937 _IO_flockfile (stderr); 938 939 int old_flags2 = ((_IO_FILE *) stderr)->_flags2; 940 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL; 941 942 __fxprintf (NULL, "%s", buf); 943 944 ((_IO_FILE *) stderr)->_flags2 = old_flags2; 945 _IO_funlockfile (stderr); 946 947 free (buf); 948 } 949#else 950 fprintf (stderr, _("%s: option '-W %s' is ambiguous\n"), 951 argv[0], d->optarg); 952#endif 953 } 954 d->__nextchar += strlen (d->__nextchar); 955 d->optind++; 956 return '?'; 957 } 958 if (pfound != NULL) 959 { 960 option_index = indfound; 961 if (*nameend) 962 { 963 /* Don't test has_arg with >, because some C compilers don't 964 allow it to be used on enums. */ 965 if (pfound->has_arg) 966 d->optarg = nameend + 1; 967 else 968 { 969 if (print_errors) 970 { 971#if defined _LIBC && defined USE_IN_LIBIO 972 char *buf; 973 974 if (__asprintf (&buf, _("\ 975%s: option '-W %s' doesn't allow an argument\n"), 976 argv[0], pfound->name) >= 0) 977 { 978 _IO_flockfile (stderr); 979 980 int old_flags2 = ((_IO_FILE *) stderr)->_flags2; 981 ((_IO_FILE *) stderr)->_flags2 982 |= _IO_FLAGS2_NOTCANCEL; 983 984 __fxprintf (NULL, "%s", buf); 985 986 ((_IO_FILE *) stderr)->_flags2 = old_flags2; 987 _IO_funlockfile (stderr); 988 989 free (buf); 990 } 991#else 992 fprintf (stderr, _("\ 993%s: option '-W %s' doesn't allow an argument\n"), 994 argv[0], pfound->name); 995#endif 996 } 997 998 d->__nextchar += strlen (d->__nextchar); 999 return '?'; 1000 } 1001 } 1002 else if (pfound->has_arg == 1) 1003 { 1004 if (d->optind < argc) 1005 d->optarg = argv[d->optind++]; 1006 else 1007 { 1008 if (print_errors) 1009 { 1010#if defined _LIBC && defined USE_IN_LIBIO 1011 char *buf; 1012 1013 if (__asprintf (&buf, _("\ 1014%s: option '-W %s' requires an argument\n"), 1015 argv[0], pfound->name) >= 0) 1016 { 1017 _IO_flockfile (stderr); 1018 1019 int old_flags2 = ((_IO_FILE *) stderr)->_flags2; 1020 ((_IO_FILE *) stderr)->_flags2 1021 |= _IO_FLAGS2_NOTCANCEL; 1022 1023 __fxprintf (NULL, "%s", buf); 1024 1025 ((_IO_FILE *) stderr)->_flags2 = old_flags2; 1026 _IO_funlockfile (stderr); 1027 1028 free (buf); 1029 } 1030#else 1031 fprintf (stderr, _("\ 1032%s: option '-W %s' requires an argument\n"), 1033 argv[0], pfound->name); 1034#endif 1035 } 1036 d->__nextchar += strlen (d->__nextchar); 1037 return optstring[0] == ':' ? ':' : '?'; 1038 } 1039 } 1040 else 1041 d->optarg = NULL; 1042 d->__nextchar += strlen (d->__nextchar); 1043 if (longind != NULL) 1044 *longind = option_index; 1045 if (pfound->flag) 1046 { 1047 *(pfound->flag) = pfound->val; 1048 return 0; 1049 } 1050 return pfound->val; 1051 } 1052 1053 no_longs: 1054 d->__nextchar = NULL; 1055 return 'W'; /* Let the application handle it. */ 1056 } 1057 if (temp[1] == ':') 1058 { 1059 if (temp[2] == ':') 1060 { 1061 /* This is an option that accepts an argument optionally. */ 1062 if (*d->__nextchar != '\0') 1063 { 1064 d->optarg = d->__nextchar; 1065 d->optind++; 1066 } 1067 else 1068 d->optarg = NULL; 1069 d->__nextchar = NULL; 1070 } 1071 else 1072 { 1073 /* This is an option that requires an argument. */ 1074 if (*d->__nextchar != '\0') 1075 { 1076 d->optarg = d->__nextchar; 1077 /* If we end this ARGV-element by taking the rest as an arg, 1078 we must advance to the next element now. */ 1079 d->optind++; 1080 } 1081 else if (d->optind == argc) 1082 { 1083 if (print_errors) 1084 { 1085#if defined _LIBC && defined USE_IN_LIBIO 1086 char *buf; 1087 1088 if (__asprintf (&buf, _("\ 1089%s: option requires an argument -- '%c'\n"), 1090 argv[0], c) >= 0) 1091 { 1092 _IO_flockfile (stderr); 1093 1094 int old_flags2 = ((_IO_FILE *) stderr)->_flags2; 1095 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL; 1096 1097 __fxprintf (NULL, "%s", buf); 1098 1099 ((_IO_FILE *) stderr)->_flags2 = old_flags2; 1100 _IO_funlockfile (stderr); 1101 1102 free (buf); 1103 } 1104#else 1105 fprintf (stderr, 1106 _("%s: option requires an argument -- '%c'\n"), 1107 argv[0], c); 1108#endif 1109 } 1110 d->optopt = c; 1111 if (optstring[0] == ':') 1112 c = ':'; 1113 else 1114 c = '?'; 1115 } 1116 else 1117 /* We already incremented 'optind' once; 1118 increment it again when taking next ARGV-elt as argument. */ 1119 d->optarg = argv[d->optind++]; 1120 d->__nextchar = NULL; 1121 } 1122 } 1123 return c; 1124 } 1125} 1126 1127int 1128_getopt_internal (int argc, char **argv, const char *optstring, 1129 const struct option *longopts, int *longind, int long_only, 1130 int posixly_correct) 1131{ 1132 int result; 1133 1134 getopt_data.optind = optind; 1135 getopt_data.opterr = opterr; 1136 1137 result = _getopt_internal_r (argc, argv, optstring, longopts, 1138 longind, long_only, &getopt_data, 1139 posixly_correct); 1140 1141 optind = getopt_data.optind; 1142 optarg = getopt_data.optarg; 1143 optopt = getopt_data.optopt; 1144 1145 return result; 1146} 1147 1148/* glibc gets a LSB-compliant getopt. 1149 Standalone applications get a POSIX-compliant getopt. */ 1150#if _LIBC 1151enum { POSIXLY_CORRECT = 0 }; 1152#else 1153enum { POSIXLY_CORRECT = 1 }; 1154#endif 1155 1156int 1157getopt (int argc, char *const *argv, const char *optstring) 1158{ 1159 return _getopt_internal (argc, (char **) argv, optstring, 1160 (const struct option *) 0, 1161 (int *) 0, 1162 0, POSIXLY_CORRECT); 1163} 1164 1165#ifdef _LIBC 1166int 1167__posix_getopt (int argc, char *const *argv, const char *optstring) 1168{ 1169 return _getopt_internal (argc, argv, optstring, 1170 (const struct option *) 0, 1171 (int *) 0, 1172 0, 1); 1173} 1174#endif 1175 1176 1177#ifdef TEST 1178 1179/* Compile with -DTEST to make an executable for use in testing 1180 the above definition of 'getopt'. */ 1181 1182int 1183main (int argc, char **argv) 1184{ 1185 int c; 1186 int digit_optind = 0; 1187 1188 while (1) 1189 { 1190 int this_option_optind = optind ? optind : 1; 1191 1192 c = getopt (argc, argv, "abc:d:0123456789"); 1193 if (c == -1) 1194 break; 1195 1196 switch (c) 1197 { 1198 case '0': 1199 case '1': 1200 case '2': 1201 case '3': 1202 case '4': 1203 case '5': 1204 case '6': 1205 case '7': 1206 case '8': 1207 case '9': 1208 if (digit_optind != 0 && digit_optind != this_option_optind) 1209 printf ("digits occur in two different argv-elements.\n"); 1210 digit_optind = this_option_optind; 1211 printf ("option %c\n", c); 1212 break; 1213 1214 case 'a': 1215 printf ("option a\n"); 1216 break; 1217 1218 case 'b': 1219 printf ("option b\n"); 1220 break; 1221 1222 case 'c': 1223 printf ("option c with value '%s'\n", optarg); 1224 break; 1225 1226 case '?': 1227 break; 1228 1229 default: 1230 printf ("?? getopt returned character code 0%o ??\n", c); 1231 } 1232 } 1233 1234 if (optind < argc) 1235 { 1236 printf ("non-option ARGV-elements: "); 1237 while (optind < argc) 1238 printf ("%s ", argv[optind++]); 1239 printf ("\n"); 1240 } 1241 1242 exit (0); 1243} 1244 1245#endif /* TEST */ 1246