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, 2008-2010 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#ifndef attribute_hidden 45# define attribute_hidden 46#endif 47 48/* This version of `getopt' appears to the caller like standard Unix `getopt' 49 but it behaves differently for the user, since it allows the user 50 to intersperse the options with the other arguments. 51 52 As `getopt_long' works, it permutes the elements of ARGV so that, 53 when it is done, all the options precede everything else. Thus 54 all application programs are extended to handle flexible argument order. 55 56 Using `getopt' or setting the environment variable POSIXLY_CORRECT 57 disables permutation. 58 Then the behavior is completely standard. 59 60 GNU application programs can use a third alternative mode in which 61 they can distinguish the relative order of options and other arguments. */ 62 63#include "getopt_int.h" 64 65/* For communication from `getopt' to the caller. 66 When `getopt' finds an option that takes an argument, 67 the argument value is returned here. 68 Also, when `ordering' is RETURN_IN_ORDER, 69 each non-option ARGV-element is returned here. */ 70 71char *optarg; 72 73/* Index in ARGV of the next element to be scanned. 74 This is used for communication to and from the caller 75 and for communication between successive calls to `getopt'. 76 77 On entry to `getopt', zero means this is the first call; initialize. 78 79 When `getopt' returns -1, this is the index of the first of the 80 non-option elements that the caller should itself scan. 81 82 Otherwise, `optind' communicates from one call to the next 83 how much of ARGV has been scanned so far. */ 84 85/* 1003.2 says this must be 1 before any call. */ 86int optind = 1; 87 88/* Callers store zero here to inhibit the error message 89 for unrecognized options. */ 90 91int opterr = 1; 92 93/* Set to an option character which was unrecognized. 94 This must be initialized on some systems to avoid linking in the 95 system's own getopt implementation. */ 96 97int optopt = '?'; 98 99/* Keep a global copy of all internal members of getopt_data. */ 100 101static struct _getopt_data getopt_data; 102 103 104#if defined HAVE_DECL_GETENV && !HAVE_DECL_GETENV 105extern char *getenv (); 106#endif 107 108#ifdef _LIBC 109/* Stored original parameters. 110 XXX This is no good solution. We should rather copy the args so 111 that we can compare them later. But we must not use malloc(3). */ 112extern int __libc_argc; 113extern char **__libc_argv; 114 115/* Bash 2.0 gives us an environment variable containing flags 116 indicating ARGV elements that should not be considered arguments. */ 117 118# ifdef USE_NONOPTION_FLAGS 119/* Defined in getopt_init.c */ 120extern char *__getopt_nonoption_flags; 121# endif 122 123# ifdef USE_NONOPTION_FLAGS 124# define SWAP_FLAGS(ch1, ch2) \ 125 if (d->__nonoption_flags_len > 0) \ 126 { \ 127 char __tmp = __getopt_nonoption_flags[ch1]; \ 128 __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \ 129 __getopt_nonoption_flags[ch2] = __tmp; \ 130 } 131# else 132# define SWAP_FLAGS(ch1, ch2) 133# endif 134#else /* !_LIBC */ 135# define SWAP_FLAGS(ch1, ch2) 136#endif /* _LIBC */ 137 138/* Exchange two adjacent subsequences of ARGV. 139 One subsequence is elements [first_nonopt,last_nonopt) 140 which contains all the non-options that have been skipped so far. 141 The other is elements [last_nonopt,optind), which contains all 142 the options processed since those non-options were skipped. 143 144 `first_nonopt' and `last_nonopt' are relocated so that they describe 145 the new indices of the non-options in ARGV after they are moved. */ 146 147static void 148exchange (char **argv, struct _getopt_data *d) 149{ 150 int bottom = d->__first_nonopt; 151 int middle = d->__last_nonopt; 152 int top = d->optind; 153 char *tem; 154 155 /* Exchange the shorter segment with the far end of the longer segment. 156 That puts the shorter segment into the right place. 157 It leaves the longer segment in the right place overall, 158 but it consists of two parts that need to be swapped next. */ 159 160#if defined _LIBC && defined USE_NONOPTION_FLAGS 161 /* First make sure the handling of the `__getopt_nonoption_flags' 162 string can work normally. Our top argument must be in the range 163 of the string. */ 164 if (d->__nonoption_flags_len > 0 && top >= d->__nonoption_flags_max_len) 165 { 166 /* We must extend the array. The user plays games with us and 167 presents new arguments. */ 168 char *new_str = malloc (top + 1); 169 if (new_str == NULL) 170 d->__nonoption_flags_len = d->__nonoption_flags_max_len = 0; 171 else 172 { 173 memset (__mempcpy (new_str, __getopt_nonoption_flags, 174 d->__nonoption_flags_max_len), 175 '\0', top + 1 - d->__nonoption_flags_max_len); 176 d->__nonoption_flags_max_len = top + 1; 177 __getopt_nonoption_flags = new_str; 178 } 179 } 180#endif 181 182 while (top > middle && middle > bottom) 183 { 184 if (top - middle > middle - bottom) 185 { 186 /* Bottom segment is the short one. */ 187 int len = middle - bottom; 188 register int i; 189 190 /* Swap it with the top part of the top segment. */ 191 for (i = 0; i < len; i++) 192 { 193 tem = argv[bottom + i]; 194 argv[bottom + i] = argv[top - (middle - bottom) + i]; 195 argv[top - (middle - bottom) + i] = tem; 196 SWAP_FLAGS (bottom + i, top - (middle - bottom) + i); 197 } 198 /* Exclude the moved bottom segment from further swapping. */ 199 top -= len; 200 } 201 else 202 { 203 /* Top segment is the short one. */ 204 int len = top - middle; 205 register int i; 206 207 /* Swap it with the bottom part of the bottom segment. */ 208 for (i = 0; i < len; i++) 209 { 210 tem = argv[bottom + i]; 211 argv[bottom + i] = argv[middle + i]; 212 argv[middle + i] = tem; 213 SWAP_FLAGS (bottom + i, middle + i); 214 } 215 /* Exclude the moved top segment from further swapping. */ 216 bottom += len; 217 } 218 } 219 220 /* Update records for the slots the non-options now occupy. */ 221 222 d->__first_nonopt += (d->optind - d->__last_nonopt); 223 d->__last_nonopt = d->optind; 224} 225 226/* Initialize the internal data when the first call is made. */ 227 228static const char * 229_getopt_initialize (int argc _GL_UNUSED, 230 char **argv _GL_UNUSED, const char *optstring, 231 struct _getopt_data *d, int posixly_correct) 232{ 233 /* Start processing options with ARGV-element 1 (since ARGV-element 0 234 is the program name); the sequence of previously skipped 235 non-option ARGV-elements is empty. */ 236 237 d->__first_nonopt = d->__last_nonopt = d->optind; 238 239 d->__nextchar = NULL; 240 241 d->__posixly_correct = posixly_correct || !!getenv ("POSIXLY_CORRECT"); 242 243 /* Determine how to handle the ordering of options and nonoptions. */ 244 245 if (optstring[0] == '-') 246 { 247 d->__ordering = RETURN_IN_ORDER; 248 ++optstring; 249 } 250 else if (optstring[0] == '+') 251 { 252 d->__ordering = REQUIRE_ORDER; 253 ++optstring; 254 } 255 else if (d->__posixly_correct) 256 d->__ordering = REQUIRE_ORDER; 257 else 258 d->__ordering = PERMUTE; 259 260#if defined _LIBC && defined USE_NONOPTION_FLAGS 261 if (!d->__posixly_correct 262 && argc == __libc_argc && argv == __libc_argv) 263 { 264 if (d->__nonoption_flags_max_len == 0) 265 { 266 if (__getopt_nonoption_flags == NULL 267 || __getopt_nonoption_flags[0] == '\0') 268 d->__nonoption_flags_max_len = -1; 269 else 270 { 271 const char *orig_str = __getopt_nonoption_flags; 272 int len = d->__nonoption_flags_max_len = strlen (orig_str); 273 if (d->__nonoption_flags_max_len < argc) 274 d->__nonoption_flags_max_len = argc; 275 __getopt_nonoption_flags = 276 (char *) malloc (d->__nonoption_flags_max_len); 277 if (__getopt_nonoption_flags == NULL) 278 d->__nonoption_flags_max_len = -1; 279 else 280 memset (__mempcpy (__getopt_nonoption_flags, orig_str, len), 281 '\0', d->__nonoption_flags_max_len - len); 282 } 283 } 284 d->__nonoption_flags_len = d->__nonoption_flags_max_len; 285 } 286 else 287 d->__nonoption_flags_len = 0; 288#endif 289 290 return optstring; 291} 292 293/* Scan elements of ARGV (whose length is ARGC) for option characters 294 given in OPTSTRING. 295 296 If an element of ARGV starts with '-', and is not exactly "-" or "--", 297 then it is an option element. The characters of this element 298 (aside from the initial '-') are option characters. If `getopt' 299 is called repeatedly, it returns successively each of the option characters 300 from each of the option elements. 301 302 If `getopt' finds another option character, it returns that character, 303 updating `optind' and `nextchar' so that the next call to `getopt' can 304 resume the scan with the following option character or ARGV-element. 305 306 If there are no more option characters, `getopt' returns -1. 307 Then `optind' is the index in ARGV of the first ARGV-element 308 that is not an option. (The ARGV-elements have been permuted 309 so that those that are not options now come last.) 310 311 OPTSTRING is a string containing the legitimate option characters. 312 If an option character is seen that is not listed in OPTSTRING, 313 return '?' after printing an error message. If you set `opterr' to 314 zero, the error message is suppressed but we still return '?'. 315 316 If a char in OPTSTRING is followed by a colon, that means it wants an arg, 317 so the following text in the same ARGV-element, or the text of the following 318 ARGV-element, is returned in `optarg'. Two colons mean an option that 319 wants an optional arg; if there is text in the current ARGV-element, 320 it is returned in `optarg', otherwise `optarg' is set to zero. 321 322 If OPTSTRING starts with `-' or `+', it requests different methods of 323 handling the non-option ARGV-elements. 324 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above. 325 326 Long-named options begin with `--' instead of `-'. 327 Their names may be abbreviated as long as the abbreviation is unique 328 or is an exact match for some defined option. If they have an 329 argument, it follows the option name in the same ARGV-element, separated 330 from the option name by a `=', or else the in next ARGV-element. 331 When `getopt' finds a long-named option, it returns 0 if that option's 332 `flag' field is nonzero, the value of the option's `val' field 333 if the `flag' field is zero. 334 335 The elements of ARGV aren't really const, because we permute them. 336 But we pretend they're const in the prototype to be compatible 337 with other systems. 338 339 LONGOPTS is a vector of `struct option' terminated by an 340 element containing a name which is zero. 341 342 LONGIND returns the index in LONGOPT of the long-named option found. 343 It is only valid when a long-named option has been found by the most 344 recent call. 345 346 If LONG_ONLY is nonzero, '-' as well as '--' can introduce 347 long-named options. */ 348 349int 350_getopt_internal_r (int argc, char **argv, const char *optstring, 351 const struct option *longopts, int *longind, 352 int long_only, struct _getopt_data *d, int posixly_correct) 353{ 354 int print_errors = d->opterr; 355 if (optstring[0] == ':') 356 print_errors = 0; 357 358 if (argc < 1) 359 return -1; 360 361 d->optarg = NULL; 362 363 if (d->optind == 0 || !d->__initialized) 364 { 365 if (d->optind == 0) 366 d->optind = 1; /* Don't scan ARGV[0], the program name. */ 367 optstring = _getopt_initialize (argc, argv, optstring, d, 368 posixly_correct); 369 d->__initialized = 1; 370 } 371 372 /* Test whether ARGV[optind] points to a non-option argument. 373 Either it does not have option syntax, or there is an environment flag 374 from the shell indicating it is not an option. The later information 375 is only used when the used in the GNU libc. */ 376#if defined _LIBC && defined USE_NONOPTION_FLAGS 377# define NONOPTION_P (argv[d->optind][0] != '-' || argv[d->optind][1] == '\0' \ 378 || (d->optind < d->__nonoption_flags_len \ 379 && __getopt_nonoption_flags[d->optind] == '1')) 380#else 381# define NONOPTION_P (argv[d->optind][0] != '-' || argv[d->optind][1] == '\0') 382#endif 383 384 if (d->__nextchar == NULL || *d->__nextchar == '\0') 385 { 386 /* Advance to the next ARGV-element. */ 387 388 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been 389 moved back by the user (who may also have changed the arguments). */ 390 if (d->__last_nonopt > d->optind) 391 d->__last_nonopt = d->optind; 392 if (d->__first_nonopt > d->optind) 393 d->__first_nonopt = d->optind; 394 395 if (d->__ordering == PERMUTE) 396 { 397 /* If we have just processed some options following some non-options, 398 exchange them so that the options come first. */ 399 400 if (d->__first_nonopt != d->__last_nonopt 401 && d->__last_nonopt != d->optind) 402 exchange ((char **) argv, d); 403 else if (d->__last_nonopt != d->optind) 404 d->__first_nonopt = d->optind; 405 406 /* Skip any additional non-options 407 and extend the range of non-options previously skipped. */ 408 409 while (d->optind < argc && NONOPTION_P) 410 d->optind++; 411 d->__last_nonopt = d->optind; 412 } 413 414 /* The special ARGV-element `--' means premature end of options. 415 Skip it like a null option, 416 then exchange with previous non-options as if it were an option, 417 then skip everything else like a non-option. */ 418 419 if (d->optind != argc && !strcmp (argv[d->optind], "--")) 420 { 421 d->optind++; 422 423 if (d->__first_nonopt != d->__last_nonopt 424 && d->__last_nonopt != d->optind) 425 exchange ((char **) argv, d); 426 else if (d->__first_nonopt == d->__last_nonopt) 427 d->__first_nonopt = d->optind; 428 d->__last_nonopt = argc; 429 430 d->optind = argc; 431 } 432 433 /* If we have done all the ARGV-elements, stop the scan 434 and back over any non-options that we skipped and permuted. */ 435 436 if (d->optind == argc) 437 { 438 /* Set the next-arg-index to point at the non-options 439 that we previously skipped, so the caller will digest them. */ 440 if (d->__first_nonopt != d->__last_nonopt) 441 d->optind = d->__first_nonopt; 442 return -1; 443 } 444 445 /* If we have come to a non-option and did not permute it, 446 either stop the scan or describe it to the caller and pass it by. */ 447 448 if (NONOPTION_P) 449 { 450 if (d->__ordering == REQUIRE_ORDER) 451 return -1; 452 d->optarg = argv[d->optind++]; 453 return 1; 454 } 455 456 /* We have found another option-ARGV-element. 457 Skip the initial punctuation. */ 458 459 d->__nextchar = (argv[d->optind] + 1 460 + (longopts != NULL && argv[d->optind][1] == '-')); 461 } 462 463 /* Decode the current option-ARGV-element. */ 464 465 /* Check whether the ARGV-element is a long option. 466 467 If long_only and the ARGV-element has the form "-f", where f is 468 a valid short option, don't consider it an abbreviated form of 469 a long option that starts with f. Otherwise there would be no 470 way to give the -f short option. 471 472 On the other hand, if there's a long option "fubar" and 473 the ARGV-element is "-fu", do consider that an abbreviation of 474 the long option, just like "--fu", and not "-f" with arg "u". 475 476 This distinction seems to be the most useful approach. */ 477 478 if (longopts != NULL 479 && (argv[d->optind][1] == '-' 480 || (long_only && (argv[d->optind][2] 481 || !strchr (optstring, argv[d->optind][1]))))) 482 { 483 char *nameend; 484 const struct option *p; 485 const struct option *pfound = NULL; 486 int exact = 0; 487 int ambig = 0; 488 int indfound = -1; 489 int option_index; 490 491 for (nameend = d->__nextchar; *nameend && *nameend != '='; nameend++) 492 /* Do nothing. */ ; 493 494 /* Test all long options for either exact match 495 or abbreviated matches. */ 496 for (p = longopts, option_index = 0; p->name; p++, option_index++) 497 if (!strncmp (p->name, d->__nextchar, nameend - d->__nextchar)) 498 { 499 if ((unsigned int) (nameend - d->__nextchar) 500 == (unsigned int) strlen (p->name)) 501 { 502 /* Exact match found. */ 503 pfound = p; 504 indfound = option_index; 505 exact = 1; 506 break; 507 } 508 else if (pfound == NULL) 509 { 510 /* First nonexact match found. */ 511 pfound = p; 512 indfound = option_index; 513 } 514 else if (long_only 515 || pfound->has_arg != p->has_arg 516 || pfound->flag != p->flag 517 || pfound->val != p->val) 518 /* Second or later nonexact match found. */ 519 ambig = 1; 520 } 521 522 if (ambig && !exact) 523 { 524 if (print_errors) 525 { 526#if defined _LIBC && defined USE_IN_LIBIO 527 char *buf; 528 529 if (__asprintf (&buf, _("%s: option '%s' is ambiguous\n"), 530 argv[0], argv[d->optind]) >= 0) 531 { 532 _IO_flockfile (stderr); 533 534 int old_flags2 = ((_IO_FILE *) stderr)->_flags2; 535 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL; 536 537 __fxprintf (NULL, "%s", buf); 538 539 ((_IO_FILE *) stderr)->_flags2 = old_flags2; 540 _IO_funlockfile (stderr); 541 542 free (buf); 543 } 544#else 545 fprintf (stderr, _("%s: option '%s' is ambiguous\n"), 546 argv[0], argv[d->optind]); 547#endif 548 } 549 d->__nextchar += strlen (d->__nextchar); 550 d->optind++; 551 d->optopt = 0; 552 return '?'; 553 } 554 555 if (pfound != NULL) 556 { 557 option_index = indfound; 558 d->optind++; 559 if (*nameend) 560 { 561 /* Don't test has_arg with >, because some C compilers don't 562 allow it to be used on enums. */ 563 if (pfound->has_arg) 564 d->optarg = nameend + 1; 565 else 566 { 567 if (print_errors) 568 { 569#if defined _LIBC && defined USE_IN_LIBIO 570 char *buf; 571 int n; 572#endif 573 574 if (argv[d->optind - 1][1] == '-') 575 { 576 /* --option */ 577#if defined _LIBC && defined USE_IN_LIBIO 578 n = __asprintf (&buf, _("\ 579%s: option '--%s' doesn't allow an argument\n"), 580 argv[0], pfound->name); 581#else 582 fprintf (stderr, _("\ 583%s: option '--%s' doesn't allow an argument\n"), 584 argv[0], pfound->name); 585#endif 586 } 587 else 588 { 589 /* +option or -option */ 590#if defined _LIBC && defined USE_IN_LIBIO 591 n = __asprintf (&buf, _("\ 592%s: option '%c%s' doesn't allow an argument\n"), 593 argv[0], argv[d->optind - 1][0], 594 pfound->name); 595#else 596 fprintf (stderr, _("\ 597%s: option '%c%s' doesn't allow an argument\n"), 598 argv[0], argv[d->optind - 1][0], 599 pfound->name); 600#endif 601 } 602 603#if defined _LIBC && defined USE_IN_LIBIO 604 if (n >= 0) 605 { 606 _IO_flockfile (stderr); 607 608 int old_flags2 = ((_IO_FILE *) stderr)->_flags2; 609 ((_IO_FILE *) stderr)->_flags2 610 |= _IO_FLAGS2_NOTCANCEL; 611 612 __fxprintf (NULL, "%s", buf); 613 614 ((_IO_FILE *) stderr)->_flags2 = old_flags2; 615 _IO_funlockfile (stderr); 616 617 free (buf); 618 } 619#endif 620 } 621 622 d->__nextchar += strlen (d->__nextchar); 623 624 d->optopt = pfound->val; 625 return '?'; 626 } 627 } 628 else if (pfound->has_arg == 1) 629 { 630 if (d->optind < argc) 631 d->optarg = argv[d->optind++]; 632 else 633 { 634 if (print_errors) 635 { 636#if defined _LIBC && defined USE_IN_LIBIO 637 char *buf; 638 639 if (__asprintf (&buf, _("\ 640%s: option '%s' requires an argument\n"), 641 argv[0], argv[d->optind - 1]) >= 0) 642 { 643 _IO_flockfile (stderr); 644 645 int old_flags2 = ((_IO_FILE *) stderr)->_flags2; 646 ((_IO_FILE *) stderr)->_flags2 647 |= _IO_FLAGS2_NOTCANCEL; 648 649 __fxprintf (NULL, "%s", buf); 650 651 ((_IO_FILE *) stderr)->_flags2 = old_flags2; 652 _IO_funlockfile (stderr); 653 654 free (buf); 655 } 656#else 657 fprintf (stderr, 658 _("%s: option '%s' requires an argument\n"), 659 argv[0], argv[d->optind - 1]); 660#endif 661 } 662 d->__nextchar += strlen (d->__nextchar); 663 d->optopt = pfound->val; 664 return optstring[0] == ':' ? ':' : '?'; 665 } 666 } 667 d->__nextchar += strlen (d->__nextchar); 668 if (longind != NULL) 669 *longind = option_index; 670 if (pfound->flag) 671 { 672 *(pfound->flag) = pfound->val; 673 return 0; 674 } 675 return pfound->val; 676 } 677 678 /* Can't find it as a long option. If this is not getopt_long_only, 679 or the option starts with '--' or is not a valid short 680 option, then it's an error. 681 Otherwise interpret it as a short option. */ 682 if (!long_only || argv[d->optind][1] == '-' 683 || strchr (optstring, *d->__nextchar) == NULL) 684 { 685 if (print_errors) 686 { 687#if defined _LIBC && defined USE_IN_LIBIO 688 char *buf; 689 int n; 690#endif 691 692 if (argv[d->optind][1] == '-') 693 { 694 /* --option */ 695#if defined _LIBC && defined USE_IN_LIBIO 696 n = __asprintf (&buf, _("%s: unrecognized option '--%s'\n"), 697 argv[0], d->__nextchar); 698#else 699 fprintf (stderr, _("%s: unrecognized option '--%s'\n"), 700 argv[0], d->__nextchar); 701#endif 702 } 703 else 704 { 705 /* +option or -option */ 706#if defined _LIBC && defined USE_IN_LIBIO 707 n = __asprintf (&buf, _("%s: unrecognized option '%c%s'\n"), 708 argv[0], argv[d->optind][0], d->__nextchar); 709#else 710 fprintf (stderr, _("%s: unrecognized option '%c%s'\n"), 711 argv[0], argv[d->optind][0], d->__nextchar); 712#endif 713 } 714 715#if defined _LIBC && defined USE_IN_LIBIO 716 if (n >= 0) 717 { 718 _IO_flockfile (stderr); 719 720 int old_flags2 = ((_IO_FILE *) stderr)->_flags2; 721 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL; 722 723 __fxprintf (NULL, "%s", buf); 724 725 ((_IO_FILE *) stderr)->_flags2 = old_flags2; 726 _IO_funlockfile (stderr); 727 728 free (buf); 729 } 730#endif 731 } 732 d->__nextchar = (char *) ""; 733 d->optind++; 734 d->optopt = 0; 735 return '?'; 736 } 737 } 738 739 /* Look at and handle the next short option-character. */ 740 741 { 742 char c = *d->__nextchar++; 743 char *temp = strchr (optstring, c); 744 745 /* Increment `optind' when we start to process its last character. */ 746 if (*d->__nextchar == '\0') 747 ++d->optind; 748 749 if (temp == NULL || c == ':') 750 { 751 if (print_errors) 752 { 753#if defined _LIBC && defined USE_IN_LIBIO 754 char *buf; 755 int n; 756#endif 757 758#if defined _LIBC && defined USE_IN_LIBIO 759 n = __asprintf (&buf, _("%s: invalid option -- '%c'\n"), 760 argv[0], c); 761#else 762 fprintf (stderr, _("%s: invalid option -- '%c'\n"), argv[0], c); 763#endif 764 765#if defined _LIBC && defined USE_IN_LIBIO 766 if (n >= 0) 767 { 768 _IO_flockfile (stderr); 769 770 int old_flags2 = ((_IO_FILE *) stderr)->_flags2; 771 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL; 772 773 __fxprintf (NULL, "%s", buf); 774 775 ((_IO_FILE *) stderr)->_flags2 = old_flags2; 776 _IO_funlockfile (stderr); 777 778 free (buf); 779 } 780#endif 781 } 782 d->optopt = c; 783 return '?'; 784 } 785 /* Convenience. Treat POSIX -W foo same as long option --foo */ 786 if (temp[0] == 'W' && temp[1] == ';') 787 { 788 char *nameend; 789 const struct option *p; 790 const struct option *pfound = NULL; 791 int exact = 0; 792 int ambig = 0; 793 int indfound = 0; 794 int option_index; 795 796 /* This is an option that requires an argument. */ 797 if (*d->__nextchar != '\0') 798 { 799 d->optarg = d->__nextchar; 800 /* If we end this ARGV-element by taking the rest as an arg, 801 we must advance to the next element now. */ 802 d->optind++; 803 } 804 else if (d->optind == argc) 805 { 806 if (print_errors) 807 { 808#if defined _LIBC && defined USE_IN_LIBIO 809 char *buf; 810 811 if (__asprintf (&buf, 812 _("%s: option requires an argument -- '%c'\n"), 813 argv[0], c) >= 0) 814 { 815 _IO_flockfile (stderr); 816 817 int old_flags2 = ((_IO_FILE *) stderr)->_flags2; 818 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL; 819 820 __fxprintf (NULL, "%s", buf); 821 822 ((_IO_FILE *) stderr)->_flags2 = old_flags2; 823 _IO_funlockfile (stderr); 824 825 free (buf); 826 } 827#else 828 fprintf (stderr, 829 _("%s: option requires an argument -- '%c'\n"), 830 argv[0], c); 831#endif 832 } 833 d->optopt = c; 834 if (optstring[0] == ':') 835 c = ':'; 836 else 837 c = '?'; 838 return c; 839 } 840 else 841 /* We already incremented `d->optind' once; 842 increment it again when taking next ARGV-elt as argument. */ 843 d->optarg = argv[d->optind++]; 844 845 /* optarg is now the argument, see if it's in the 846 table of longopts. */ 847 848 for (d->__nextchar = nameend = d->optarg; *nameend && *nameend != '='; 849 nameend++) 850 /* Do nothing. */ ; 851 852 /* Test all long options for either exact match 853 or abbreviated matches. */ 854 for (p = longopts, option_index = 0; p->name; p++, option_index++) 855 if (!strncmp (p->name, d->__nextchar, nameend - d->__nextchar)) 856 { 857 if ((unsigned int) (nameend - d->__nextchar) == strlen (p->name)) 858 { 859 /* Exact match found. */ 860 pfound = p; 861 indfound = option_index; 862 exact = 1; 863 break; 864 } 865 else if (pfound == NULL) 866 { 867 /* First nonexact match found. */ 868 pfound = p; 869 indfound = option_index; 870 } 871 else 872 /* Second or later nonexact match found. */ 873 ambig = 1; 874 } 875 if (ambig && !exact) 876 { 877 if (print_errors) 878 { 879#if defined _LIBC && defined USE_IN_LIBIO 880 char *buf; 881 882 if (__asprintf (&buf, _("%s: option '-W %s' is ambiguous\n"), 883 argv[0], argv[d->optind]) >= 0) 884 { 885 _IO_flockfile (stderr); 886 887 int old_flags2 = ((_IO_FILE *) stderr)->_flags2; 888 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL; 889 890 __fxprintf (NULL, "%s", buf); 891 892 ((_IO_FILE *) stderr)->_flags2 = old_flags2; 893 _IO_funlockfile (stderr); 894 895 free (buf); 896 } 897#else 898 fprintf (stderr, _("%s: option '-W %s' is ambiguous\n"), 899 argv[0], argv[d->optind]); 900#endif 901 } 902 d->__nextchar += strlen (d->__nextchar); 903 d->optind++; 904 return '?'; 905 } 906 if (pfound != NULL) 907 { 908 option_index = indfound; 909 if (*nameend) 910 { 911 /* Don't test has_arg with >, because some C compilers don't 912 allow it to be used on enums. */ 913 if (pfound->has_arg) 914 d->optarg = nameend + 1; 915 else 916 { 917 if (print_errors) 918 { 919#if defined _LIBC && defined USE_IN_LIBIO 920 char *buf; 921 922 if (__asprintf (&buf, _("\ 923%s: option '-W %s' doesn't allow an argument\n"), 924 argv[0], pfound->name) >= 0) 925 { 926 _IO_flockfile (stderr); 927 928 int old_flags2 = ((_IO_FILE *) stderr)->_flags2; 929 ((_IO_FILE *) stderr)->_flags2 930 |= _IO_FLAGS2_NOTCANCEL; 931 932 __fxprintf (NULL, "%s", buf); 933 934 ((_IO_FILE *) stderr)->_flags2 = old_flags2; 935 _IO_funlockfile (stderr); 936 937 free (buf); 938 } 939#else 940 fprintf (stderr, _("\ 941%s: option '-W %s' doesn't allow an argument\n"), 942 argv[0], pfound->name); 943#endif 944 } 945 946 d->__nextchar += strlen (d->__nextchar); 947 return '?'; 948 } 949 } 950 else if (pfound->has_arg == 1) 951 { 952 if (d->optind < argc) 953 d->optarg = argv[d->optind++]; 954 else 955 { 956 if (print_errors) 957 { 958#if defined _LIBC && defined USE_IN_LIBIO 959 char *buf; 960 961 if (__asprintf (&buf, _("\ 962%s: option '%s' requires an argument\n"), 963 argv[0], argv[d->optind - 1]) >= 0) 964 { 965 _IO_flockfile (stderr); 966 967 int old_flags2 = ((_IO_FILE *) stderr)->_flags2; 968 ((_IO_FILE *) stderr)->_flags2 969 |= _IO_FLAGS2_NOTCANCEL; 970 971 __fxprintf (NULL, "%s", buf); 972 973 ((_IO_FILE *) stderr)->_flags2 = old_flags2; 974 _IO_funlockfile (stderr); 975 976 free (buf); 977 } 978#else 979 fprintf (stderr, 980 _("%s: option '%s' requires an argument\n"), 981 argv[0], argv[d->optind - 1]); 982#endif 983 } 984 d->__nextchar += strlen (d->__nextchar); 985 return optstring[0] == ':' ? ':' : '?'; 986 } 987 } 988 d->__nextchar += strlen (d->__nextchar); 989 if (longind != NULL) 990 *longind = option_index; 991 if (pfound->flag) 992 { 993 *(pfound->flag) = pfound->val; 994 return 0; 995 } 996 return pfound->val; 997 } 998 d->__nextchar = NULL; 999 return 'W'; /* Let the application handle it. */ 1000 } 1001 if (temp[1] == ':') 1002 { 1003 if (temp[2] == ':') 1004 { 1005 /* This is an option that accepts an argument optionally. */ 1006 if (*d->__nextchar != '\0') 1007 { 1008 d->optarg = d->__nextchar; 1009 d->optind++; 1010 } 1011 else 1012 d->optarg = NULL; 1013 d->__nextchar = NULL; 1014 } 1015 else 1016 { 1017 /* This is an option that requires an argument. */ 1018 if (*d->__nextchar != '\0') 1019 { 1020 d->optarg = d->__nextchar; 1021 /* If we end this ARGV-element by taking the rest as an arg, 1022 we must advance to the next element now. */ 1023 d->optind++; 1024 } 1025 else if (d->optind == argc) 1026 { 1027 if (print_errors) 1028 { 1029#if defined _LIBC && defined USE_IN_LIBIO 1030 char *buf; 1031 1032 if (__asprintf (&buf, _("\ 1033%s: option requires an argument -- '%c'\n"), 1034 argv[0], c) >= 0) 1035 { 1036 _IO_flockfile (stderr); 1037 1038 int old_flags2 = ((_IO_FILE *) stderr)->_flags2; 1039 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL; 1040 1041 __fxprintf (NULL, "%s", buf); 1042 1043 ((_IO_FILE *) stderr)->_flags2 = old_flags2; 1044 _IO_funlockfile (stderr); 1045 1046 free (buf); 1047 } 1048#else 1049 fprintf (stderr, 1050 _("%s: option requires an argument -- '%c'\n"), 1051 argv[0], c); 1052#endif 1053 } 1054 d->optopt = c; 1055 if (optstring[0] == ':') 1056 c = ':'; 1057 else 1058 c = '?'; 1059 } 1060 else 1061 /* We already incremented `optind' once; 1062 increment it again when taking next ARGV-elt as argument. */ 1063 d->optarg = argv[d->optind++]; 1064 d->__nextchar = NULL; 1065 } 1066 } 1067 return c; 1068 } 1069} 1070 1071int 1072_getopt_internal (int argc, char **argv, const char *optstring, 1073 const struct option *longopts, int *longind, int long_only, 1074 int posixly_correct) 1075{ 1076 int result; 1077 1078 getopt_data.optind = optind; 1079 getopt_data.opterr = opterr; 1080 1081 result = _getopt_internal_r (argc, argv, optstring, longopts, 1082 longind, long_only, &getopt_data, 1083 posixly_correct); 1084 1085 optind = getopt_data.optind; 1086 optarg = getopt_data.optarg; 1087 optopt = getopt_data.optopt; 1088 1089 return result; 1090} 1091 1092/* glibc gets a LSB-compliant getopt. 1093 Standalone applications get a POSIX-compliant getopt. */ 1094#if _LIBC 1095enum { POSIXLY_CORRECT = 0 }; 1096#else 1097enum { POSIXLY_CORRECT = 1 }; 1098#endif 1099 1100int 1101getopt (int argc, char *const *argv, const char *optstring) 1102{ 1103 return _getopt_internal (argc, (char **) argv, optstring, 1104 (const struct option *) 0, 1105 (int *) 0, 1106 0, POSIXLY_CORRECT); 1107} 1108 1109#ifdef _LIBC 1110int 1111__posix_getopt (int argc, char *const *argv, const char *optstring) 1112{ 1113 return _getopt_internal (argc, argv, optstring, 1114 (const struct option *) 0, 1115 (int *) 0, 1116 0, 1); 1117} 1118#endif 1119 1120 1121#ifdef TEST 1122 1123/* Compile with -DTEST to make an executable for use in testing 1124 the above definition of `getopt'. */ 1125 1126int 1127main (int argc, char **argv) 1128{ 1129 int c; 1130 int digit_optind = 0; 1131 1132 while (1) 1133 { 1134 int this_option_optind = optind ? optind : 1; 1135 1136 c = getopt (argc, argv, "abc:d:0123456789"); 1137 if (c == -1) 1138 break; 1139 1140 switch (c) 1141 { 1142 case '0': 1143 case '1': 1144 case '2': 1145 case '3': 1146 case '4': 1147 case '5': 1148 case '6': 1149 case '7': 1150 case '8': 1151 case '9': 1152 if (digit_optind != 0 && digit_optind != this_option_optind) 1153 printf ("digits occur in two different argv-elements.\n"); 1154 digit_optind = this_option_optind; 1155 printf ("option %c\n", c); 1156 break; 1157 1158 case 'a': 1159 printf ("option a\n"); 1160 break; 1161 1162 case 'b': 1163 printf ("option b\n"); 1164 break; 1165 1166 case 'c': 1167 printf ("option c with value '%s'\n", optarg); 1168 break; 1169 1170 case '?': 1171 break; 1172 1173 default: 1174 printf ("?? getopt returned character code 0%o ??\n", c); 1175 } 1176 } 1177 1178 if (optind < argc) 1179 { 1180 printf ("non-option ARGV-elements: "); 1181 while (optind < argc) 1182 printf ("%s ", argv[optind++]); 1183 printf ("\n"); 1184 } 1185 1186 exit (0); 1187} 1188 1189#endif /* TEST */ 1190