1/* Getopt for GNU. 2 NOTE: getopt is now 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) 1987,88,89,90,91,92,93,94,95,96,98,99,2000,2001,2002,2003,2004,2006 6 Free Software 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 __VMS 34# include <unixlib.h> 35#endif 36 37#ifdef _LIBC 38# include <libintl.h> 39#else 40# include "gettext.h" 41# define _(msgid) gettext (msgid) 42#endif 43 44#if defined _LIBC && defined USE_IN_LIBIO 45# include <wchar.h> 46#endif 47 48#ifndef attribute_hidden 49# define attribute_hidden 50#endif 51 52/* Unlike standard Unix `getopt', functions like `getopt_long' 53 let the user intersperse the options with the other arguments. 54 55 As `getopt_long' works, it permutes the elements of ARGV so that, 56 when it is done, all the options precede everything else. Thus 57 all application programs are extended to handle flexible argument order. 58 59 Using `getopt' or setting the environment variable POSIXLY_CORRECT 60 disables permutation. 61 Then the application's behavior is completely standard. 62 63 GNU application programs can use a third alternative mode in which 64 they can distinguish the relative order of options and other arguments. */ 65 66#include "getopt_int.h" 67 68/* For communication from `getopt' to the caller. 69 When `getopt' finds an option that takes an argument, 70 the argument value is returned here. 71 Also, when `ordering' is RETURN_IN_ORDER, 72 each non-option ARGV-element is returned here. */ 73 74char *optarg; 75 76/* Index in ARGV of the next element to be scanned. 77 This is used for communication to and from the caller 78 and for communication between successive calls to `getopt'. 79 80 On entry to `getopt', zero means this is the first call; initialize. 81 82 When `getopt' returns -1, this is the index of the first of the 83 non-option elements that the caller should itself scan. 84 85 Otherwise, `optind' communicates from one call to the next 86 how much of ARGV has been scanned so far. */ 87 88/* 1003.2 says this must be 1 before any call. */ 89int optind = 1; 90 91/* Callers store zero here to inhibit the error message 92 for unrecognized options. */ 93 94int opterr = 1; 95 96/* Set to an option character which was unrecognized. 97 This must be initialized on some systems to avoid linking in the 98 system's own getopt implementation. */ 99 100int optopt = '?'; 101 102/* Keep a global copy of all internal members of getopt_data. */ 103 104static struct _getopt_data getopt_data; 105 106 107#if defined HAVE_DECL_GETENV && !HAVE_DECL_GETENV 108extern char *getenv (); 109#endif 110 111#ifdef _LIBC 112/* Stored original parameters. 113 XXX This is no good solution. We should rather copy the args so 114 that we can compare them later. But we must not use malloc(3). */ 115extern int __libc_argc; 116extern char **__libc_argv; 117 118/* Bash 2.0 gives us an environment variable containing flags 119 indicating ARGV elements that should not be considered arguments. */ 120 121# ifdef USE_NONOPTION_FLAGS 122/* Defined in getopt_init.c */ 123extern char *__getopt_nonoption_flags; 124# endif 125 126# ifdef USE_NONOPTION_FLAGS 127# define SWAP_FLAGS(ch1, ch2) \ 128 if (d->__nonoption_flags_len > 0) \ 129 { \ 130 char __tmp = __getopt_nonoption_flags[ch1]; \ 131 __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \ 132 __getopt_nonoption_flags[ch2] = __tmp; \ 133 } 134# else 135# define SWAP_FLAGS(ch1, ch2) 136# endif 137#else /* !_LIBC */ 138# define SWAP_FLAGS(ch1, ch2) 139#endif /* _LIBC */ 140 141/* Exchange two adjacent subsequences of ARGV. 142 One subsequence is elements [first_nonopt,last_nonopt) 143 which contains all the non-options that have been skipped so far. 144 The other is elements [last_nonopt,optind), which contains all 145 the options processed since those non-options were skipped. 146 147 `first_nonopt' and `last_nonopt' are relocated so that they describe 148 the new indices of the non-options in ARGV after they are moved. */ 149 150static void 151exchange (char **argv, struct _getopt_data *d) 152{ 153 int bottom = d->__first_nonopt; 154 int middle = d->__last_nonopt; 155 int top = d->optind; 156 char *tem; 157 158 /* Exchange the shorter segment with the far end of the longer segment. 159 That puts the shorter segment into the right place. 160 It leaves the longer segment in the right place overall, 161 but it consists of two parts that need to be swapped next. */ 162 163#if defined _LIBC && defined USE_NONOPTION_FLAGS 164 /* First make sure the handling of the `__getopt_nonoption_flags' 165 string can work normally. Our top argument must be in the range 166 of the string. */ 167 if (d->__nonoption_flags_len > 0 && top >= d->__nonoption_flags_max_len) 168 { 169 /* We must extend the array. The user plays games with us and 170 presents new arguments. */ 171 char *new_str = malloc (top + 1); 172 if (new_str == NULL) 173 d->__nonoption_flags_len = d->__nonoption_flags_max_len = 0; 174 else 175 { 176 memset (__mempcpy (new_str, __getopt_nonoption_flags, 177 d->__nonoption_flags_max_len), 178 '\0', top + 1 - d->__nonoption_flags_max_len); 179 d->__nonoption_flags_max_len = top + 1; 180 __getopt_nonoption_flags = new_str; 181 } 182 } 183#endif 184 185 while (top > middle && middle > bottom) 186 { 187 if (top - middle > middle - bottom) 188 { 189 /* Bottom segment is the short one. */ 190 int len = middle - bottom; 191 register int i; 192 193 /* Swap it with the top part of the top segment. */ 194 for (i = 0; i < len; i++) 195 { 196 tem = argv[bottom + i]; 197 argv[bottom + i] = argv[top - (middle - bottom) + i]; 198 argv[top - (middle - bottom) + i] = tem; 199 SWAP_FLAGS (bottom + i, top - (middle - bottom) + i); 200 } 201 /* Exclude the moved bottom segment from further swapping. */ 202 top -= len; 203 } 204 else 205 { 206 /* Top segment is the short one. */ 207 int len = top - middle; 208 register int i; 209 210 /* Swap it with the bottom part of the bottom segment. */ 211 for (i = 0; i < len; i++) 212 { 213 tem = argv[bottom + i]; 214 argv[bottom + i] = argv[middle + i]; 215 argv[middle + i] = tem; 216 SWAP_FLAGS (bottom + i, middle + i); 217 } 218 /* Exclude the moved top segment from further swapping. */ 219 bottom += len; 220 } 221 } 222 223 /* Update records for the slots the non-options now occupy. */ 224 225 d->__first_nonopt += (d->optind - d->__last_nonopt); 226 d->__last_nonopt = d->optind; 227} 228 229/* Initialize the internal data when the first call is made. */ 230 231static const char * 232_getopt_initialize (int argc, char **argv, const char *optstring, 233 int posixly_correct, struct _getopt_data *d) 234{ 235 /* Start processing options with ARGV-element 1 (since ARGV-element 0 236 is the program name); the sequence of previously skipped 237 non-option ARGV-elements is empty. */ 238 239 d->__first_nonopt = d->__last_nonopt = d->optind; 240 241 d->__nextchar = NULL; 242 243 d->__posixly_correct = posixly_correct || !!getenv ("POSIXLY_CORRECT"); 244 245 /* Determine how to handle the ordering of options and nonoptions. */ 246 247 if (optstring[0] == '-') 248 { 249 d->__ordering = RETURN_IN_ORDER; 250 ++optstring; 251 } 252 else if (optstring[0] == '+') 253 { 254 d->__ordering = REQUIRE_ORDER; 255 ++optstring; 256 } 257 else if (d->__posixly_correct) 258 d->__ordering = REQUIRE_ORDER; 259 else 260 d->__ordering = PERMUTE; 261 262#if defined _LIBC && defined USE_NONOPTION_FLAGS 263 if (!d->__posixly_correct 264 && argc == __libc_argc && argv == __libc_argv) 265 { 266 if (d->__nonoption_flags_max_len == 0) 267 { 268 if (__getopt_nonoption_flags == NULL 269 || __getopt_nonoption_flags[0] == '\0') 270 d->__nonoption_flags_max_len = -1; 271 else 272 { 273 const char *orig_str = __getopt_nonoption_flags; 274 int len = d->__nonoption_flags_max_len = strlen (orig_str); 275 if (d->__nonoption_flags_max_len < argc) 276 d->__nonoption_flags_max_len = argc; 277 __getopt_nonoption_flags = 278 (char *) malloc (d->__nonoption_flags_max_len); 279 if (__getopt_nonoption_flags == NULL) 280 d->__nonoption_flags_max_len = -1; 281 else 282 memset (__mempcpy (__getopt_nonoption_flags, orig_str, len), 283 '\0', d->__nonoption_flags_max_len - len); 284 } 285 } 286 d->__nonoption_flags_len = d->__nonoption_flags_max_len; 287 } 288 else 289 d->__nonoption_flags_len = 0; 290#endif 291 292 return optstring; 293} 294 295/* Scan elements of ARGV (whose length is ARGC) for option characters 296 given in OPTSTRING. 297 298 If an element of ARGV starts with '-', and is not exactly "-" or "--", 299 then it is an option element. The characters of this element 300 (aside from the initial '-') are option characters. If `getopt' 301 is called repeatedly, it returns successively each of the option characters 302 from each of the option elements. 303 304 If `getopt' finds another option character, it returns that character, 305 updating `optind' and `nextchar' so that the next call to `getopt' can 306 resume the scan with the following option character or ARGV-element. 307 308 If there are no more option characters, `getopt' returns -1. 309 Then `optind' is the index in ARGV of the first ARGV-element 310 that is not an option. (The ARGV-elements have been permuted 311 so that those that are not options now come last.) 312 313 OPTSTRING is a string containing the legitimate option characters. 314 If an option character is seen that is not listed in OPTSTRING, 315 return '?' after printing an error message. If you set `opterr' to 316 zero, the error message is suppressed but we still return '?'. 317 318 If a char in OPTSTRING is followed by a colon, that means it wants an arg, 319 so the following text in the same ARGV-element, or the text of the following 320 ARGV-element, is returned in `optarg'. Two colons mean an option that 321 wants an optional arg; if there is text in the current ARGV-element, 322 it is returned in `optarg', otherwise `optarg' is set to zero. 323 324 If OPTSTRING starts with `-' or `+', it requests different methods of 325 handling the non-option ARGV-elements. 326 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above. 327 328 Long-named options begin with `--' instead of `-'. 329 Their names may be abbreviated as long as the abbreviation is unique 330 or is an exact match for some defined option. If they have an 331 argument, it follows the option name in the same ARGV-element, separated 332 from the option name by a `=', or else the in next ARGV-element. 333 When `getopt' finds a long-named option, it returns 0 if that option's 334 `flag' field is nonzero, the value of the option's `val' field 335 if the `flag' field is zero. 336 337 LONGOPTS is a vector of `struct option' terminated by an 338 element containing a name which is zero. 339 340 LONGIND returns the index in LONGOPT of the long-named option found. 341 It is only valid when a long-named option has been found by the most 342 recent call. 343 344 If LONG_ONLY is nonzero, '-' as well as '--' can introduce 345 long-named options. 346 347 If POSIXLY_CORRECT is nonzero, behave as if the POSIXLY_CORRECT 348 environment variable were set. */ 349 350int 351_getopt_internal_r (int argc, char **argv, const char *optstring, 352 const struct option *longopts, int *longind, 353 int long_only, int posixly_correct, struct _getopt_data *d) 354{ 355 int print_errors = d->opterr; 356 if (optstring[0] == ':') 357 print_errors = 0; 358 359 if (argc < 1) 360 return -1; 361 362 d->optarg = NULL; 363 364 if (d->optind == 0 || !d->__initialized) 365 { 366 if (d->optind == 0) 367 d->optind = 1; /* Don't scan ARGV[0], the program name. */ 368 optstring = _getopt_initialize (argc, argv, optstring, 369 posixly_correct, d); 370 d->__initialized = 1; 371 } 372 373 /* Test whether ARGV[optind] points to a non-option argument. 374 Either it does not have option syntax, or there is an environment flag 375 from the shell indicating it is not an option. The later information 376 is only used when the used in the GNU libc. */ 377#if defined _LIBC && defined USE_NONOPTION_FLAGS 378# define NONOPTION_P (argv[d->optind][0] != '-' || argv[d->optind][1] == '\0' \ 379 || (d->optind < d->__nonoption_flags_len \ 380 && __getopt_nonoption_flags[d->optind] == '1')) 381#else 382# define NONOPTION_P (argv[d->optind][0] != '-' || argv[d->optind][1] == '\0') 383#endif 384 385 if (d->__nextchar == NULL || *d->__nextchar == '\0') 386 { 387 /* Advance to the next ARGV-element. */ 388 389 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been 390 moved back by the user (who may also have changed the arguments). */ 391 if (d->__last_nonopt > d->optind) 392 d->__last_nonopt = d->optind; 393 if (d->__first_nonopt > d->optind) 394 d->__first_nonopt = d->optind; 395 396 if (d->__ordering == PERMUTE) 397 { 398 /* If we have just processed some options following some non-options, 399 exchange them so that the options come first. */ 400 401 if (d->__first_nonopt != d->__last_nonopt 402 && d->__last_nonopt != d->optind) 403 exchange ((char **) argv, d); 404 else if (d->__last_nonopt != d->optind) 405 d->__first_nonopt = d->optind; 406 407 /* Skip any additional non-options 408 and extend the range of non-options previously skipped. */ 409 410 while (d->optind < argc && NONOPTION_P) 411 d->optind++; 412 d->__last_nonopt = d->optind; 413 } 414 415 /* The special ARGV-element `--' means premature end of options. 416 Skip it like a null option, 417 then exchange with previous non-options as if it were an option, 418 then skip everything else like a non-option. */ 419 420 if (d->optind != argc && !strcmp (argv[d->optind], "--")) 421 { 422 d->optind++; 423 424 if (d->__first_nonopt != d->__last_nonopt 425 && d->__last_nonopt != d->optind) 426 exchange ((char **) argv, d); 427 else if (d->__first_nonopt == d->__last_nonopt) 428 d->__first_nonopt = d->optind; 429 d->__last_nonopt = argc; 430 431 d->optind = argc; 432 } 433 434 /* If we have done all the ARGV-elements, stop the scan 435 and back over any non-options that we skipped and permuted. */ 436 437 if (d->optind == argc) 438 { 439 /* Set the next-arg-index to point at the non-options 440 that we previously skipped, so the caller will digest them. */ 441 if (d->__first_nonopt != d->__last_nonopt) 442 d->optind = d->__first_nonopt; 443 return -1; 444 } 445 446 /* If we have come to a non-option and did not permute it, 447 either stop the scan or describe it to the caller and pass it by. */ 448 449 if (NONOPTION_P) 450 { 451 if (d->__ordering == REQUIRE_ORDER) 452 return -1; 453 d->optarg = argv[d->optind++]; 454 return 1; 455 } 456 457 /* We have found another option-ARGV-element. 458 Skip the initial punctuation. */ 459 460 d->__nextchar = (argv[d->optind] + 1 461 + (longopts != NULL && argv[d->optind][1] == '-')); 462 } 463 464 /* Decode the current option-ARGV-element. */ 465 466 /* Check whether the ARGV-element is a long option. 467 468 If long_only and the ARGV-element has the form "-f", where f is 469 a valid short option, don't consider it an abbreviated form of 470 a long option that starts with f. Otherwise there would be no 471 way to give the -f short option. 472 473 On the other hand, if there's a long option "fubar" and 474 the ARGV-element is "-fu", do consider that an abbreviation of 475 the long option, just like "--fu", and not "-f" with arg "u". 476 477 This distinction seems to be the most useful approach. */ 478 479 if (longopts != NULL 480 && (argv[d->optind][1] == '-' 481 || (long_only && (argv[d->optind][2] 482 || !strchr (optstring, argv[d->optind][1]))))) 483 { 484 char *nameend; 485 const struct option *p; 486 const struct option *pfound = NULL; 487 int exact = 0; 488 int ambig = 0; 489 int indfound = -1; 490 int option_index; 491 492 for (nameend = d->__nextchar; *nameend && *nameend != '='; nameend++) 493 /* Do nothing. */ ; 494 495 /* Test all long options for either exact match 496 or abbreviated matches. */ 497 for (p = longopts, option_index = 0; p->name; p++, option_index++) 498 if (!strncmp (p->name, d->__nextchar, nameend - d->__nextchar)) 499 { 500 if ((unsigned int) (nameend - d->__nextchar) 501 == (unsigned int) strlen (p->name)) 502 { 503 /* Exact match found. */ 504 pfound = p; 505 indfound = option_index; 506 exact = 1; 507 break; 508 } 509 else if (pfound == NULL) 510 { 511 /* First nonexact match found. */ 512 pfound = p; 513 indfound = option_index; 514 } 515 else if (long_only 516 || pfound->has_arg != p->has_arg 517 || pfound->flag != p->flag 518 || pfound->val != p->val) 519 /* Second or later nonexact match found. */ 520 ambig = 1; 521 } 522 523 if (ambig && !exact) 524 { 525 if (print_errors) 526 { 527#if defined _LIBC && defined USE_IN_LIBIO 528 char *buf; 529 530 if (__asprintf (&buf, _("%s: option `%s' is ambiguous\n"), 531 argv[0], argv[d->optind]) >= 0) 532 { 533 _IO_flockfile (stderr); 534 535 int old_flags2 = ((_IO_FILE *) stderr)->_flags2; 536 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL; 537 538 __fxprintf (NULL, "%s", buf); 539 540 ((_IO_FILE *) stderr)->_flags2 = old_flags2; 541 _IO_funlockfile (stderr); 542 543 free (buf); 544 } 545#else 546 fprintf (stderr, _("%s: option `%s' is ambiguous\n"), 547 argv[0], argv[d->optind]); 548#endif 549 } 550 d->__nextchar += strlen (d->__nextchar); 551 d->optind++; 552 d->optopt = 0; 553 return '?'; 554 } 555 556 if (pfound != NULL) 557 { 558 option_index = indfound; 559 d->optind++; 560 if (*nameend) 561 { 562 /* Don't test has_arg with >, because some C compilers don't 563 allow it to be used on enums. */ 564 if (pfound->has_arg) 565 d->optarg = nameend + 1; 566 else 567 { 568 if (print_errors) 569 { 570#if defined _LIBC && defined USE_IN_LIBIO 571 char *buf; 572 int n; 573#endif 574 575 if (argv[d->optind - 1][1] == '-') 576 { 577 /* --option */ 578#if defined _LIBC && defined USE_IN_LIBIO 579 n = __asprintf (&buf, _("\ 580%s: option `--%s' doesn't allow an argument\n"), 581 argv[0], pfound->name); 582#else 583 fprintf (stderr, _("\ 584%s: option `--%s' doesn't allow an argument\n"), 585 argv[0], pfound->name); 586#endif 587 } 588 else 589 { 590 /* +option or -option */ 591#if defined _LIBC && defined USE_IN_LIBIO 592 n = __asprintf (&buf, _("\ 593%s: option `%c%s' doesn't allow an argument\n"), 594 argv[0], argv[d->optind - 1][0], 595 pfound->name); 596#else 597 fprintf (stderr, _("\ 598%s: option `%c%s' doesn't allow an argument\n"), 599 argv[0], argv[d->optind - 1][0], 600 pfound->name); 601#endif 602 } 603 604#if defined _LIBC && defined USE_IN_LIBIO 605 if (n >= 0) 606 { 607 _IO_flockfile (stderr); 608 609 int old_flags2 = ((_IO_FILE *) stderr)->_flags2; 610 ((_IO_FILE *) stderr)->_flags2 611 |= _IO_FLAGS2_NOTCANCEL; 612 613 __fxprintf (NULL, "%s", buf); 614 615 ((_IO_FILE *) stderr)->_flags2 = old_flags2; 616 _IO_funlockfile (stderr); 617 618 free (buf); 619 } 620#endif 621 } 622 623 d->__nextchar += strlen (d->__nextchar); 624 625 d->optopt = pfound->val; 626 return '?'; 627 } 628 } 629 else if (pfound->has_arg == 1) 630 { 631 if (d->optind < argc) 632 d->optarg = argv[d->optind++]; 633 else 634 { 635 if (print_errors) 636 { 637#if defined _LIBC && defined USE_IN_LIBIO 638 char *buf; 639 640 if (__asprintf (&buf, _("\ 641%s: option `%s' requires an argument\n"), 642 argv[0], argv[d->optind - 1]) >= 0) 643 { 644 _IO_flockfile (stderr); 645 646 int old_flags2 = ((_IO_FILE *) stderr)->_flags2; 647 ((_IO_FILE *) stderr)->_flags2 648 |= _IO_FLAGS2_NOTCANCEL; 649 650 __fxprintf (NULL, "%s", buf); 651 652 ((_IO_FILE *) stderr)->_flags2 = old_flags2; 653 _IO_funlockfile (stderr); 654 655 free (buf); 656 } 657#else 658 fprintf (stderr, 659 _("%s: option `%s' requires an argument\n"), 660 argv[0], argv[d->optind - 1]); 661#endif 662 } 663 d->__nextchar += strlen (d->__nextchar); 664 d->optopt = pfound->val; 665 return optstring[0] == ':' ? ':' : '?'; 666 } 667 } 668 d->__nextchar += strlen (d->__nextchar); 669 if (longind != NULL) 670 *longind = option_index; 671 if (pfound->flag) 672 { 673 *(pfound->flag) = pfound->val; 674 return 0; 675 } 676 return pfound->val; 677 } 678 679 /* Can't find it as a long option. If this is not getopt_long_only, 680 or the option starts with '--' or is not a valid short 681 option, then it's an error. 682 Otherwise interpret it as a short option. */ 683 if (!long_only || argv[d->optind][1] == '-' 684 || strchr (optstring, *d->__nextchar) == NULL) 685 { 686 if (print_errors) 687 { 688#if defined _LIBC && defined USE_IN_LIBIO 689 char *buf; 690 int n; 691#endif 692 693 if (argv[d->optind][1] == '-') 694 { 695 /* --option */ 696#if defined _LIBC && defined USE_IN_LIBIO 697 n = __asprintf (&buf, _("%s: unrecognized option `--%s'\n"), 698 argv[0], d->__nextchar); 699#else 700 fprintf (stderr, _("%s: unrecognized option `--%s'\n"), 701 argv[0], d->__nextchar); 702#endif 703 } 704 else 705 { 706 /* +option or -option */ 707#if defined _LIBC && defined USE_IN_LIBIO 708 n = __asprintf (&buf, _("%s: unrecognized option `%c%s'\n"), 709 argv[0], argv[d->optind][0], d->__nextchar); 710#else 711 fprintf (stderr, _("%s: unrecognized option `%c%s'\n"), 712 argv[0], argv[d->optind][0], d->__nextchar); 713#endif 714 } 715 716#if defined _LIBC && defined USE_IN_LIBIO 717 if (n >= 0) 718 { 719 _IO_flockfile (stderr); 720 721 int old_flags2 = ((_IO_FILE *) stderr)->_flags2; 722 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL; 723 724 __fxprintf (NULL, "%s", buf); 725 726 ((_IO_FILE *) stderr)->_flags2 = old_flags2; 727 _IO_funlockfile (stderr); 728 729 free (buf); 730 } 731#endif 732 } 733 d->__nextchar = (char *) ""; 734 d->optind++; 735 d->optopt = 0; 736 return '?'; 737 } 738 } 739 740 /* Look at and handle the next short option-character. */ 741 742 { 743 char c = *d->__nextchar++; 744 char *temp = strchr (optstring, c); 745 746 /* Increment `optind' when we start to process its last character. */ 747 if (*d->__nextchar == '\0') 748 ++d->optind; 749 750 if (temp == NULL || c == ':') 751 { 752 if (print_errors) 753 { 754#if defined _LIBC && defined USE_IN_LIBIO 755 char *buf; 756 int n; 757#endif 758 759 if (d->__posixly_correct) 760 { 761 /* 1003.2 specifies the format of this message. */ 762#if defined _LIBC && defined USE_IN_LIBIO 763 n = __asprintf (&buf, _("%s: illegal option -- %c\n"), 764 argv[0], c); 765#else 766 fprintf (stderr, _("%s: illegal option -- %c\n"), argv[0], c); 767#endif 768 } 769 else 770 { 771#if defined _LIBC && defined USE_IN_LIBIO 772 n = __asprintf (&buf, _("%s: invalid option -- %c\n"), 773 argv[0], c); 774#else 775 fprintf (stderr, _("%s: invalid option -- %c\n"), argv[0], c); 776#endif 777 } 778 779#if defined _LIBC && defined USE_IN_LIBIO 780 if (n >= 0) 781 { 782 _IO_flockfile (stderr); 783 784 int old_flags2 = ((_IO_FILE *) stderr)->_flags2; 785 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL; 786 787 __fxprintf (NULL, "%s", buf); 788 789 ((_IO_FILE *) stderr)->_flags2 = old_flags2; 790 _IO_funlockfile (stderr); 791 792 free (buf); 793 } 794#endif 795 } 796 d->optopt = c; 797 return '?'; 798 } 799 /* Convenience. Treat POSIX -W foo same as long option --foo */ 800 if (temp[0] == 'W' && temp[1] == ';') 801 { 802 char *nameend; 803 const struct option *p; 804 const struct option *pfound = NULL; 805 int exact = 0; 806 int ambig = 0; 807 int indfound = 0; 808 int option_index; 809 810 /* This is an option that requires an argument. */ 811 if (*d->__nextchar != '\0') 812 { 813 d->optarg = d->__nextchar; 814 /* If we end this ARGV-element by taking the rest as an arg, 815 we must advance to the next element now. */ 816 d->optind++; 817 } 818 else if (d->optind == argc) 819 { 820 if (print_errors) 821 { 822 /* 1003.2 specifies the format of this message. */ 823#if defined _LIBC && defined USE_IN_LIBIO 824 char *buf; 825 826 if (__asprintf (&buf, 827 _("%s: option requires an argument -- %c\n"), 828 argv[0], c) >= 0) 829 { 830 _IO_flockfile (stderr); 831 832 int old_flags2 = ((_IO_FILE *) stderr)->_flags2; 833 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL; 834 835 __fxprintf (NULL, "%s", buf); 836 837 ((_IO_FILE *) stderr)->_flags2 = old_flags2; 838 _IO_funlockfile (stderr); 839 840 free (buf); 841 } 842#else 843 fprintf (stderr, _("%s: option requires an argument -- %c\n"), 844 argv[0], c); 845#endif 846 } 847 d->optopt = c; 848 if (optstring[0] == ':') 849 c = ':'; 850 else 851 c = '?'; 852 return c; 853 } 854 else 855 /* We already incremented `d->optind' once; 856 increment it again when taking next ARGV-elt as argument. */ 857 d->optarg = argv[d->optind++]; 858 859 /* optarg is now the argument, see if it's in the 860 table of longopts. */ 861 862 for (d->__nextchar = nameend = d->optarg; *nameend && *nameend != '='; 863 nameend++) 864 /* Do nothing. */ ; 865 866 /* Test all long options for either exact match 867 or abbreviated matches. */ 868 for (p = longopts, option_index = 0; p->name; p++, option_index++) 869 if (!strncmp (p->name, d->__nextchar, nameend - d->__nextchar)) 870 { 871 if ((unsigned int) (nameend - d->__nextchar) == strlen (p->name)) 872 { 873 /* Exact match found. */ 874 pfound = p; 875 indfound = option_index; 876 exact = 1; 877 break; 878 } 879 else if (pfound == NULL) 880 { 881 /* First nonexact match found. */ 882 pfound = p; 883 indfound = option_index; 884 } 885 else 886 /* Second or later nonexact match found. */ 887 ambig = 1; 888 } 889 if (ambig && !exact) 890 { 891 if (print_errors) 892 { 893#if defined _LIBC && defined USE_IN_LIBIO 894 char *buf; 895 896 if (__asprintf (&buf, _("%s: option `-W %s' is ambiguous\n"), 897 argv[0], argv[d->optind]) >= 0) 898 { 899 _IO_flockfile (stderr); 900 901 int old_flags2 = ((_IO_FILE *) stderr)->_flags2; 902 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL; 903 904 __fxprintf (NULL, "%s", buf); 905 906 ((_IO_FILE *) stderr)->_flags2 = old_flags2; 907 _IO_funlockfile (stderr); 908 909 free (buf); 910 } 911#else 912 fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"), 913 argv[0], argv[d->optind]); 914#endif 915 } 916 d->__nextchar += strlen (d->__nextchar); 917 d->optind++; 918 return '?'; 919 } 920 if (pfound != NULL) 921 { 922 option_index = indfound; 923 if (*nameend) 924 { 925 /* Don't test has_arg with >, because some C compilers don't 926 allow it to be used on enums. */ 927 if (pfound->has_arg) 928 d->optarg = nameend + 1; 929 else 930 { 931 if (print_errors) 932 { 933#if defined _LIBC && defined USE_IN_LIBIO 934 char *buf; 935 936 if (__asprintf (&buf, _("\ 937%s: option `-W %s' doesn't allow an argument\n"), 938 argv[0], pfound->name) >= 0) 939 { 940 _IO_flockfile (stderr); 941 942 int old_flags2 = ((_IO_FILE *) stderr)->_flags2; 943 ((_IO_FILE *) stderr)->_flags2 944 |= _IO_FLAGS2_NOTCANCEL; 945 946 __fxprintf (NULL, "%s", buf); 947 948 ((_IO_FILE *) stderr)->_flags2 = old_flags2; 949 _IO_funlockfile (stderr); 950 951 free (buf); 952 } 953#else 954 fprintf (stderr, _("\ 955%s: option `-W %s' doesn't allow an argument\n"), 956 argv[0], pfound->name); 957#endif 958 } 959 960 d->__nextchar += strlen (d->__nextchar); 961 return '?'; 962 } 963 } 964 else if (pfound->has_arg == 1) 965 { 966 if (d->optind < argc) 967 d->optarg = argv[d->optind++]; 968 else 969 { 970 if (print_errors) 971 { 972#if defined _LIBC && defined USE_IN_LIBIO 973 char *buf; 974 975 if (__asprintf (&buf, _("\ 976%s: option `%s' requires an argument\n"), 977 argv[0], argv[d->optind - 1]) >= 0) 978 { 979 _IO_flockfile (stderr); 980 981 int old_flags2 = ((_IO_FILE *) stderr)->_flags2; 982 ((_IO_FILE *) stderr)->_flags2 983 |= _IO_FLAGS2_NOTCANCEL; 984 985 __fxprintf (NULL, "%s", buf); 986 987 ((_IO_FILE *) stderr)->_flags2 = old_flags2; 988 _IO_funlockfile (stderr); 989 990 free (buf); 991 } 992#else 993 fprintf (stderr, 994 _("%s: option `%s' requires an argument\n"), 995 argv[0], argv[d->optind - 1]); 996#endif 997 } 998 d->__nextchar += strlen (d->__nextchar); 999 return optstring[0] == ':' ? ':' : '?'; 1000 } 1001 } 1002 d->__nextchar += strlen (d->__nextchar); 1003 if (longind != NULL) 1004 *longind = option_index; 1005 if (pfound->flag) 1006 { 1007 *(pfound->flag) = pfound->val; 1008 return 0; 1009 } 1010 return pfound->val; 1011 } 1012 d->__nextchar = NULL; 1013 return 'W'; /* Let the application handle it. */ 1014 } 1015 if (temp[1] == ':') 1016 { 1017 if (temp[2] == ':') 1018 { 1019 /* This is an option that accepts an argument optionally. */ 1020 if (*d->__nextchar != '\0') 1021 { 1022 d->optarg = d->__nextchar; 1023 d->optind++; 1024 } 1025 else 1026 d->optarg = NULL; 1027 d->__nextchar = NULL; 1028 } 1029 else 1030 { 1031 /* This is an option that requires an argument. */ 1032 if (*d->__nextchar != '\0') 1033 { 1034 d->optarg = d->__nextchar; 1035 /* If we end this ARGV-element by taking the rest as an arg, 1036 we must advance to the next element now. */ 1037 d->optind++; 1038 } 1039 else if (d->optind == argc) 1040 { 1041 if (print_errors) 1042 { 1043 /* 1003.2 specifies the format of this message. */ 1044#if defined _LIBC && defined USE_IN_LIBIO 1045 char *buf; 1046 1047 if (__asprintf (&buf, _("\ 1048%s: option requires an argument -- %c\n"), 1049 argv[0], c) >= 0) 1050 { 1051 _IO_flockfile (stderr); 1052 1053 int old_flags2 = ((_IO_FILE *) stderr)->_flags2; 1054 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL; 1055 1056 __fxprintf (NULL, "%s", buf); 1057 1058 ((_IO_FILE *) stderr)->_flags2 = old_flags2; 1059 _IO_funlockfile (stderr); 1060 1061 free (buf); 1062 } 1063#else 1064 fprintf (stderr, 1065 _("%s: option requires an argument -- %c\n"), 1066 argv[0], c); 1067#endif 1068 } 1069 d->optopt = c; 1070 if (optstring[0] == ':') 1071 c = ':'; 1072 else 1073 c = '?'; 1074 } 1075 else 1076 /* We already incremented `optind' once; 1077 increment it again when taking next ARGV-elt as argument. */ 1078 d->optarg = argv[d->optind++]; 1079 d->__nextchar = NULL; 1080 } 1081 } 1082 return c; 1083 } 1084} 1085 1086int 1087_getopt_internal (int argc, char **argv, const char *optstring, 1088 const struct option *longopts, int *longind, 1089 int long_only, int posixly_correct) 1090{ 1091 int result; 1092 1093 getopt_data.optind = optind; 1094 getopt_data.opterr = opterr; 1095 1096 result = _getopt_internal_r (argc, argv, optstring, longopts, longind, 1097 long_only, posixly_correct, &getopt_data); 1098 1099 optind = getopt_data.optind; 1100 optarg = getopt_data.optarg; 1101 optopt = getopt_data.optopt; 1102 1103 return result; 1104} 1105 1106/* glibc gets a LSB-compliant getopt. 1107 Standalone applications get a POSIX-compliant getopt. */ 1108#if _LIBC 1109enum { POSIXLY_CORRECT = 0 }; 1110#else 1111enum { POSIXLY_CORRECT = 1 }; 1112#endif 1113 1114int 1115getopt (int argc, char *const *argv, const char *optstring) 1116{ 1117 return _getopt_internal (argc, (char **) argv, optstring, NULL, NULL, 0, 1118 POSIXLY_CORRECT); 1119} 1120 1121 1122#ifdef TEST 1123 1124/* Compile with -DTEST to make an executable for use in testing 1125 the above definition of `getopt'. */ 1126 1127int 1128main (int argc, char **argv) 1129{ 1130 int c; 1131 int digit_optind = 0; 1132 1133 while (1) 1134 { 1135 int this_option_optind = optind ? optind : 1; 1136 1137 c = getopt (argc, argv, "abc:d:0123456789"); 1138 if (c == -1) 1139 break; 1140 1141 switch (c) 1142 { 1143 case '0': 1144 case '1': 1145 case '2': 1146 case '3': 1147 case '4': 1148 case '5': 1149 case '6': 1150 case '7': 1151 case '8': 1152 case '9': 1153 if (digit_optind != 0 && digit_optind != this_option_optind) 1154 printf ("digits occur in two different argv-elements.\n"); 1155 digit_optind = this_option_optind; 1156 printf ("option %c\n", c); 1157 break; 1158 1159 case 'a': 1160 printf ("option a\n"); 1161 break; 1162 1163 case 'b': 1164 printf ("option b\n"); 1165 break; 1166 1167 case 'c': 1168 printf ("option c with value `%s'\n", optarg); 1169 break; 1170 1171 case '?': 1172 break; 1173 1174 default: 1175 printf ("?? getopt returned character code 0%o ??\n", c); 1176 } 1177 } 1178 1179 if (optind < argc) 1180 { 1181 printf ("non-option ARGV-elements: "); 1182 while (optind < argc) 1183 printf ("%s ", argv[optind++]); 1184 printf ("\n"); 1185 } 1186 1187 exit (0); 1188} 1189 1190#endif /* TEST */ 1191