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 6 Free Software Foundation, Inc. 7 This file is part of the GNU C Library. 8 9 The GNU C Library is free software; you can redistribute it and/or 10 modify it under the terms of the GNU Lesser General Public 11 License as published by the Free Software Foundation; either 12 version 2.1 of the License, or (at your option) any later version. 13 14 The GNU C Library 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 GNU 17 Lesser General Public License for more details. 18 19 You should have received a copy of the GNU Lesser General Public 20 License along with the GNU C Library; if not, write to the Free 21 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 22 02111-1307 USA. */ 23 24/* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>. 25 Ditto for AIX 3.2 and <stdlib.h>. */ 26#ifndef _NO_PROTO 27# define _NO_PROTO 28#endif 29 30#ifdef HAVE_CONFIG_H 31# include <config.h> 32#endif 33 34#if !defined __STDC__ || !__STDC__ 35/* This is a separate conditional since some stdc systems 36 reject `defined (const)'. */ 37# ifndef const 38# define const 39# endif 40#endif 41 42#include <stdio.h> 43 44/* Comment out all this code if we are using the GNU C Library, and are not 45 actually compiling the library itself. This code is part of the GNU C 46 Library, but also included in many other GNU distributions. Compiling 47 and linking in this code is a waste when using the GNU C library 48 (especially if it is a shared library). Rather than having every GNU 49 program understand `configure --with-gnu-libc' and omit the object files, 50 it is simpler to just do this in the source for each such file. */ 51 52#define GETOPT_INTERFACE_VERSION 2 53#if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2 54# include <gnu-versions.h> 55# if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION 56# define ELIDE_CODE 57# endif 58#endif 59 60#ifndef ELIDE_CODE 61 62 63/* This needs to come after some library #include 64 to get __GNU_LIBRARY__ defined. */ 65#ifdef __GNU_LIBRARY__ 66/* Don't include stdlib.h for non-GNU C libraries because some of them 67 contain conflicting prototypes for getopt. */ 68# include <stdlib.h> 69# include <unistd.h> 70#endif /* GNU C library. */ 71 72#ifdef VMS 73# include <unixlib.h> 74# if HAVE_STRING_H - 0 75# include <string.h> 76# endif 77#endif 78 79#ifndef _ 80/* This is for other GNU distributions with internationalized messages. */ 81# if (HAVE_LIBINTL_H && ENABLE_NLS) || defined _LIBC 82# include <libintl.h> 83# ifndef _ 84# define _(msgid) gettext (msgid) 85# endif 86# else 87# define _(msgid) (msgid) 88# endif 89#endif 90 91/* This version of `getopt' appears to the caller like standard Unix `getopt' 92 but it behaves differently for the user, since it allows the user 93 to intersperse the options with the other arguments. 94 95 As `getopt' works, it permutes the elements of ARGV so that, 96 when it is done, all the options precede everything else. Thus 97 all application programs are extended to handle flexible argument order. 98 99 Setting the environment variable POSIXLY_CORRECT disables permutation. 100 Then the behavior is completely standard. 101 102 GNU application programs can use a third alternative mode in which 103 they can distinguish the relative order of options and other arguments. */ 104 105#include "getopt.h" 106 107/* For communication from `getopt' to the caller. 108 When `getopt' finds an option that takes an argument, 109 the argument value is returned here. 110 Also, when `ordering' is RETURN_IN_ORDER, 111 each non-option ARGV-element is returned here. */ 112 113char *optarg; 114 115/* Index in ARGV of the next element to be scanned. 116 This is used for communication to and from the caller 117 and for communication between successive calls to `getopt'. 118 119 On entry to `getopt', zero means this is the first call; initialize. 120 121 When `getopt' returns -1, this is the index of the first of the 122 non-option elements that the caller should itself scan. 123 124 Otherwise, `optind' communicates from one call to the next 125 how much of ARGV has been scanned so far. */ 126 127/* 1003.2 says this must be 1 before any call. */ 128int optind = 1; 129 130/* Formerly, initialization of getopt depended on optind==0, which 131 causes problems with re-calling getopt as programs generally don't 132 know that. */ 133 134int __getopt_initialized; 135 136/* The next char to be scanned in the option-element 137 in which the last option character we returned was found. 138 This allows us to pick up the scan where we left off. 139 140 If this is zero, or a null string, it means resume the scan 141 by advancing to the next ARGV-element. */ 142 143static char *nextchar; 144 145/* Callers store zero here to inhibit the error message 146 for unrecognized options. */ 147 148int opterr = 1; 149 150/* Set to an option character which was unrecognized. 151 This must be initialized on some systems to avoid linking in the 152 system's own getopt implementation. */ 153 154int optopt = '?'; 155 156/* Describe how to deal with options that follow non-option ARGV-elements. 157 158 If the caller did not specify anything, 159 the default is REQUIRE_ORDER if the environment variable 160 POSIXLY_CORRECT is defined, PERMUTE otherwise. 161 162 REQUIRE_ORDER means don't recognize them as options; 163 stop option processing when the first non-option is seen. 164 This is what Unix does. 165 This mode of operation is selected by either setting the environment 166 variable POSIXLY_CORRECT, or using `+' as the first character 167 of the list of option characters. 168 169 PERMUTE is the default. We permute the contents of ARGV as we scan, 170 so that eventually all the non-options are at the end. This allows options 171 to be given in any order, even with programs that were not written to 172 expect this. 173 174 RETURN_IN_ORDER is an option available to programs that were written 175 to expect options and other ARGV-elements in any order and that care about 176 the ordering of the two. We describe each non-option ARGV-element 177 as if it were the argument of an option with character code 1. 178 Using `-' as the first character of the list of option characters 179 selects this mode of operation. 180 181 The special argument `--' forces an end of option-scanning regardless 182 of the value of `ordering'. In the case of RETURN_IN_ORDER, only 183 `--' can cause `getopt' to return -1 with `optind' != ARGC. */ 184 185static enum 186{ 187 REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER 188} ordering; 189 190/* Value of POSIXLY_CORRECT environment variable. */ 191static char *posixly_correct; 192 193#ifdef __GNU_LIBRARY__ 194/* We want to avoid inclusion of string.h with non-GNU libraries 195 because there are many ways it can cause trouble. 196 On some systems, it contains special magic macros that don't work 197 in GCC. */ 198# include <string.h> 199# define my_index strchr 200#else 201 202# if HAVE_STRING_H 203# include <string.h> 204# else 205# include <strings.h> 206# endif 207 208/* Avoid depending on library functions or files 209 whose names are inconsistent. */ 210 211#ifndef getenv 212#ifdef _MSC_VER 213// DDK will complain if you don't use the stdlib defined getenv 214#include <stdlib.h> 215#else 216extern char *getenv (); 217#endif 218#endif 219 220static char * 221my_index (str, chr) 222 const char *str; 223 int chr; 224{ 225 while (*str) 226 { 227 if (*str == chr) 228 return (char *) str; 229 str++; 230 } 231 return 0; 232} 233 234/* If using GCC, we can safely declare strlen this way. 235 If not using GCC, it is ok not to declare it. */ 236#ifdef __GNUC__ 237/* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h. 238 That was relevant to code that was here before. */ 239# if (!defined __STDC__ || !__STDC__) && !defined strlen 240/* gcc with -traditional declares the built-in strlen to return int, 241 and has done so at least since version 2.4.5. -- rms. */ 242extern int strlen (const char *); 243# endif /* not __STDC__ */ 244#endif /* __GNUC__ */ 245 246#endif /* not __GNU_LIBRARY__ */ 247 248/* Handle permutation of arguments. */ 249 250/* Describe the part of ARGV that contains non-options that have 251 been skipped. `first_nonopt' is the index in ARGV of the first of them; 252 `last_nonopt' is the index after the last of them. */ 253 254static int first_nonopt; 255static int last_nonopt; 256 257#ifdef _LIBC 258/* Stored original parameters. 259 XXX This is no good solution. We should rather copy the args so 260 that we can compare them later. But we must not use malloc(3). */ 261extern int __libc_argc; 262extern char **__libc_argv; 263 264/* Bash 2.0 gives us an environment variable containing flags 265 indicating ARGV elements that should not be considered arguments. */ 266 267# ifdef USE_NONOPTION_FLAGS 268/* Defined in getopt_init.c */ 269extern char *__getopt_nonoption_flags; 270 271static int nonoption_flags_max_len; 272static int nonoption_flags_len; 273# endif 274 275# ifdef USE_NONOPTION_FLAGS 276# define SWAP_FLAGS(ch1, ch2) \ 277 if (nonoption_flags_len > 0) \ 278 { \ 279 char __tmp = __getopt_nonoption_flags[ch1]; \ 280 __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \ 281 __getopt_nonoption_flags[ch2] = __tmp; \ 282 } 283# else 284# define SWAP_FLAGS(ch1, ch2) 285# endif 286#else /* !_LIBC */ 287# define SWAP_FLAGS(ch1, ch2) 288#endif /* _LIBC */ 289 290/* Exchange two adjacent subsequences of ARGV. 291 One subsequence is elements [first_nonopt,last_nonopt) 292 which contains all the non-options that have been skipped so far. 293 The other is elements [last_nonopt,optind), which contains all 294 the options processed since those non-options were skipped. 295 296 `first_nonopt' and `last_nonopt' are relocated so that they describe 297 the new indices of the non-options in ARGV after they are moved. */ 298 299#if defined __STDC__ && __STDC__ 300static void exchange (char **); 301#endif 302 303static void 304exchange (argv) 305 char **argv; 306{ 307 int bottom = first_nonopt; 308 int middle = last_nonopt; 309 int top = optind; 310 char *tem; 311 312 /* Exchange the shorter segment with the far end of the longer segment. 313 That puts the shorter segment into the right place. 314 It leaves the longer segment in the right place overall, 315 but it consists of two parts that need to be swapped next. */ 316 317#if defined _LIBC && defined USE_NONOPTION_FLAGS 318 /* First make sure the handling of the `__getopt_nonoption_flags' 319 string can work normally. Our top argument must be in the range 320 of the string. */ 321 if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len) 322 { 323 /* We must extend the array. The user plays games with us and 324 presents new arguments. */ 325 char *new_str = malloc (top + 1); 326 if (new_str == NULL) 327 nonoption_flags_len = nonoption_flags_max_len = 0; 328 else 329 { 330 memset (__mempcpy (new_str, __getopt_nonoption_flags, 331 nonoption_flags_max_len), 332 '\0', top + 1 - nonoption_flags_max_len); 333 nonoption_flags_max_len = top + 1; 334 __getopt_nonoption_flags = new_str; 335 } 336 } 337#endif 338 339 while (top > middle && middle > bottom) 340 { 341 if (top - middle > middle - bottom) 342 { 343 /* Bottom segment is the short one. */ 344 int len = middle - bottom; 345 register int i; 346 347 /* Swap it with the top part of the top segment. */ 348 for (i = 0; i < len; i++) 349 { 350 tem = argv[bottom + i]; 351 argv[bottom + i] = argv[top - (middle - bottom) + i]; 352 argv[top - (middle - bottom) + i] = tem; 353 SWAP_FLAGS (bottom + i, top - (middle - bottom) + i); 354 } 355 /* Exclude the moved bottom segment from further swapping. */ 356 top -= len; 357 } 358 else 359 { 360 /* Top segment is the short one. */ 361 int len = top - middle; 362 register int i; 363 364 /* Swap it with the bottom part of the bottom segment. */ 365 for (i = 0; i < len; i++) 366 { 367 tem = argv[bottom + i]; 368 argv[bottom + i] = argv[middle + i]; 369 argv[middle + i] = tem; 370 SWAP_FLAGS (bottom + i, middle + i); 371 } 372 /* Exclude the moved top segment from further swapping. */ 373 bottom += len; 374 } 375 } 376 377 /* Update records for the slots the non-options now occupy. */ 378 379 first_nonopt += (optind - last_nonopt); 380 last_nonopt = optind; 381} 382 383/* Initialize the internal data when the first call is made. */ 384 385#if defined __STDC__ && __STDC__ 386static const char *_getopt_initialize (int, char *const *, const char *); 387#endif 388static const char * 389_getopt_initialize (argc, argv, optstring) 390 int argc; 391 char *const *argv; 392 const char *optstring; 393{ 394 /* Start processing options with ARGV-element 1 (since ARGV-element 0 395 is the program name); the sequence of previously skipped 396 non-option ARGV-elements is empty. */ 397 398 first_nonopt = last_nonopt = optind; 399 400 nextchar = NULL; 401 402 posixly_correct = getenv ("POSIXLY_CORRECT"); 403 404 /* Determine how to handle the ordering of options and nonoptions. */ 405 406 if (optstring[0] == '-') 407 { 408 ordering = RETURN_IN_ORDER; 409 ++optstring; 410 } 411 else if (optstring[0] == '+') 412 { 413 ordering = REQUIRE_ORDER; 414 ++optstring; 415 } 416 else if (posixly_correct != NULL) 417 ordering = REQUIRE_ORDER; 418 else 419 ordering = PERMUTE; 420 421#if defined _LIBC && defined USE_NONOPTION_FLAGS 422 if (posixly_correct == NULL 423 && argc == __libc_argc && argv == __libc_argv) 424 { 425 if (nonoption_flags_max_len == 0) 426 { 427 if (__getopt_nonoption_flags == NULL 428 || __getopt_nonoption_flags[0] == '\0') 429 nonoption_flags_max_len = -1; 430 else 431 { 432 const char *orig_str = __getopt_nonoption_flags; 433 int len = nonoption_flags_max_len = strlen (orig_str); 434 if (nonoption_flags_max_len < argc) 435 nonoption_flags_max_len = argc; 436 __getopt_nonoption_flags = 437 (char *) malloc (nonoption_flags_max_len); 438 if (__getopt_nonoption_flags == NULL) 439 nonoption_flags_max_len = -1; 440 else 441 memset (__mempcpy (__getopt_nonoption_flags, orig_str, len), 442 '\0', nonoption_flags_max_len - len); 443 } 444 } 445 nonoption_flags_len = nonoption_flags_max_len; 446 } 447 else 448 nonoption_flags_len = 0; 449#endif 450 451 return optstring; 452} 453 454/* Scan elements of ARGV (whose length is ARGC) for option characters 455 given in OPTSTRING. 456 457 If an element of ARGV starts with '-', and is not exactly "-" or "--", 458 then it is an option element. The characters of this element 459 (aside from the initial '-') are option characters. If `getopt' 460 is called repeatedly, it returns successively each of the option characters 461 from each of the option elements. 462 463 If `getopt' finds another option character, it returns that character, 464 updating `optind' and `nextchar' so that the next call to `getopt' can 465 resume the scan with the following option character or ARGV-element. 466 467 If there are no more option characters, `getopt' returns -1. 468 Then `optind' is the index in ARGV of the first ARGV-element 469 that is not an option. (The ARGV-elements have been permuted 470 so that those that are not options now come last.) 471 472 OPTSTRING is a string containing the legitimate option characters. 473 If an option character is seen that is not listed in OPTSTRING, 474 return '?' after printing an error message. If you set `opterr' to 475 zero, the error message is suppressed but we still return '?'. 476 477 If a char in OPTSTRING is followed by a colon, that means it wants an arg, 478 so the following text in the same ARGV-element, or the text of the following 479 ARGV-element, is returned in `optarg'. Two colons mean an option that 480 wants an optional arg; if there is text in the current ARGV-element, 481 it is returned in `optarg', otherwise `optarg' is set to zero. 482 483 If OPTSTRING starts with `-' or `+', it requests different methods of 484 handling the non-option ARGV-elements. 485 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above. 486 487 Long-named options begin with `--' instead of `-'. 488 Their names may be abbreviated as long as the abbreviation is unique 489 or is an exact match for some defined option. If they have an 490 argument, it follows the option name in the same ARGV-element, separated 491 from the option name by a `=', or else the in next ARGV-element. 492 When `getopt' finds a long-named option, it returns 0 if that option's 493 `flag' field is nonzero, the value of the option's `val' field 494 if the `flag' field is zero. 495 496 The elements of ARGV aren't really const, because we permute them. 497 But we pretend they're const in the prototype to be compatible 498 with other systems. 499 500 LONGOPTS is a vector of `struct option' terminated by an 501 element containing a name which is zero. 502 503 LONGIND returns the index in LONGOPT of the long-named option found. 504 It is only valid when a long-named option has been found by the most 505 recent call. 506 507 If LONG_ONLY is nonzero, '-' as well as '--' can introduce 508 long-named options. */ 509 510int 511_getopt_internal (argc, argv, optstring, longopts, longind, long_only) 512 int argc; 513 char *const *argv; 514 const char *optstring; 515 const struct option *longopts; 516 int *longind; 517 int long_only; 518{ 519 int print_errors = opterr; 520 if (optstring[0] == ':') 521 print_errors = 0; 522 523 if (argc < 1) 524 return -1; 525 526 optarg = NULL; 527 528 if (optind == 0 || !__getopt_initialized) 529 { 530 if (optind == 0) 531 optind = 1; /* Don't scan ARGV[0], the program name. */ 532 optstring = _getopt_initialize (argc, argv, optstring); 533 __getopt_initialized = 1; 534 } 535 536 /* Test whether ARGV[optind] points to a non-option argument. 537 Either it does not have option syntax, or there is an environment flag 538 from the shell indicating it is not an option. The later information 539 is only used when the used in the GNU libc. */ 540#if defined _LIBC && defined USE_NONOPTION_FLAGS 541# define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \ 542 || (optind < nonoption_flags_len \ 543 && __getopt_nonoption_flags[optind] == '1')) 544#else 545# define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0') 546#endif 547 548 if (nextchar == NULL || *nextchar == '\0') 549 { 550 /* Advance to the next ARGV-element. */ 551 552 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been 553 moved back by the user (who may also have changed the arguments). */ 554 if (last_nonopt > optind) 555 last_nonopt = optind; 556 if (first_nonopt > optind) 557 first_nonopt = optind; 558 559 if (ordering == PERMUTE) 560 { 561 /* If we have just processed some options following some non-options, 562 exchange them so that the options come first. */ 563 564 if (first_nonopt != last_nonopt && last_nonopt != optind) 565 exchange ((char **) argv); 566 else if (last_nonopt != optind) 567 first_nonopt = optind; 568 569 /* Skip any additional non-options 570 and extend the range of non-options previously skipped. */ 571 572 while (optind < argc && NONOPTION_P) 573 optind++; 574 last_nonopt = optind; 575 } 576 577 /* The special ARGV-element `--' means premature end of options. 578 Skip it like a null option, 579 then exchange with previous non-options as if it were an option, 580 then skip everything else like a non-option. */ 581 582 if (optind != argc && !strcmp (argv[optind], "--")) 583 { 584 optind++; 585 586 if (first_nonopt != last_nonopt && last_nonopt != optind) 587 exchange ((char **) argv); 588 else if (first_nonopt == last_nonopt) 589 first_nonopt = optind; 590 last_nonopt = argc; 591 592 optind = argc; 593 } 594 595 /* If we have done all the ARGV-elements, stop the scan 596 and back over any non-options that we skipped and permuted. */ 597 598 if (optind == argc) 599 { 600 /* Set the next-arg-index to point at the non-options 601 that we previously skipped, so the caller will digest them. */ 602 if (first_nonopt != last_nonopt) 603 optind = first_nonopt; 604 return -1; 605 } 606 607 /* If we have come to a non-option and did not permute it, 608 either stop the scan or describe it to the caller and pass it by. */ 609 610 if (NONOPTION_P) 611 { 612 if (ordering == REQUIRE_ORDER) 613 return -1; 614 optarg = argv[optind++]; 615 return 1; 616 } 617 618 /* We have found another option-ARGV-element. 619 Skip the initial punctuation. */ 620 621 nextchar = (argv[optind] + 1 622 + (longopts != NULL && argv[optind][1] == '-')); 623 } 624 625 /* Decode the current option-ARGV-element. */ 626 627 /* Check whether the ARGV-element is a long option. 628 629 If long_only and the ARGV-element has the form "-f", where f is 630 a valid short option, don't consider it an abbreviated form of 631 a long option that starts with f. Otherwise there would be no 632 way to give the -f short option. 633 634 On the other hand, if there's a long option "fubar" and 635 the ARGV-element is "-fu", do consider that an abbreviation of 636 the long option, just like "--fu", and not "-f" with arg "u". 637 638 This distinction seems to be the most useful approach. */ 639 640 if (longopts != NULL 641 && (argv[optind][1] == '-' 642 || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1]))))) 643 { 644 char *nameend; 645 const struct option *p; 646 const struct option *pfound = NULL; 647 int exact = 0; 648 int ambig = 0; 649 int indfound = -1; 650 int option_index; 651 652 for (nameend = nextchar; *nameend && *nameend != '='; nameend++) 653 /* Do nothing. */ ; 654 655 /* Test all long options for either exact match 656 or abbreviated matches. */ 657 for (p = longopts, option_index = 0; p->name; p++, option_index++) 658 if (!strncmp (p->name, nextchar, nameend - nextchar)) 659 { 660 if ((unsigned int) (nameend - nextchar) 661 == (unsigned int) strlen (p->name)) 662 { 663 /* Exact match found. */ 664 pfound = p; 665 indfound = option_index; 666 exact = 1; 667 break; 668 } 669 else if (pfound == NULL) 670 { 671 /* First nonexact match found. */ 672 pfound = p; 673 indfound = option_index; 674 } 675 else if (long_only 676 || pfound->has_arg != p->has_arg 677 || pfound->flag != p->flag 678 || pfound->val != p->val) 679 /* Second or later nonexact match found. */ 680 ambig = 1; 681 } 682 683 if (ambig && !exact) 684 { 685 if (print_errors) 686 fprintf (stderr, _("%s: option `%s' is ambiguous\n"), 687 argv[0], argv[optind]); 688 nextchar += strlen (nextchar); 689 optind++; 690 optopt = 0; 691 return '?'; 692 } 693 694 if (pfound != NULL) 695 { 696 option_index = indfound; 697 optind++; 698 if (*nameend) 699 { 700 /* Don't test has_arg with >, because some C compilers don't 701 allow it to be used on enums. */ 702 if (pfound->has_arg) 703 optarg = nameend + 1; 704 else 705 { 706 if (print_errors) 707 { 708 if (argv[optind - 1][1] == '-') 709 /* --option */ 710 fprintf (stderr, 711 _("%s: option `--%s' doesn't allow an argument\n"), 712 argv[0], pfound->name); 713 else 714 /* +option or -option */ 715 fprintf (stderr, 716 _("%s: option `%c%s' doesn't allow an argument\n"), 717 argv[0], argv[optind - 1][0], pfound->name); 718 } 719 720 nextchar += strlen (nextchar); 721 722 optopt = pfound->val; 723 return '?'; 724 } 725 } 726 else if (pfound->has_arg == 1) 727 { 728 if (optind < argc) 729 optarg = argv[optind++]; 730 else 731 { 732 if (print_errors) 733 fprintf (stderr, 734 _("%s: option `%s' requires an argument\n"), 735 argv[0], argv[optind - 1]); 736 nextchar += strlen (nextchar); 737 optopt = pfound->val; 738 return optstring[0] == ':' ? ':' : '?'; 739 } 740 } 741 nextchar += strlen (nextchar); 742 if (longind != NULL) 743 *longind = option_index; 744 if (pfound->flag) 745 { 746 *(pfound->flag) = pfound->val; 747 return 0; 748 } 749 return pfound->val; 750 } 751 752 /* Can't find it as a long option. If this is not getopt_long_only, 753 or the option starts with '--' or is not a valid short 754 option, then it's an error. 755 Otherwise interpret it as a short option. */ 756 if (!long_only || argv[optind][1] == '-' 757 || my_index (optstring, *nextchar) == NULL) 758 { 759 if (print_errors) 760 { 761 if (argv[optind][1] == '-') 762 /* --option */ 763 fprintf (stderr, _("%s: unrecognized option `--%s'\n"), 764 argv[0], nextchar); 765 else 766 /* +option or -option */ 767 fprintf (stderr, _("%s: unrecognized option `%c%s'\n"), 768 argv[0], argv[optind][0], nextchar); 769 } 770 nextchar = (char *) ""; 771 optind++; 772 optopt = 0; 773 return '?'; 774 } 775 } 776 777 /* Look at and handle the next short option-character. */ 778 779 { 780 char c = *nextchar++; 781 char *temp = my_index (optstring, c); 782 783 /* Increment `optind' when we start to process its last character. */ 784 if (*nextchar == '\0') 785 ++optind; 786 787 if (temp == NULL || c == ':') 788 { 789 if (print_errors) 790 { 791 if (posixly_correct) 792 /* 1003.2 specifies the format of this message. */ 793 fprintf (stderr, _("%s: illegal option -- %c\n"), 794 argv[0], c); 795 else 796 fprintf (stderr, _("%s: invalid option -- %c\n"), 797 argv[0], c); 798 } 799 optopt = c; 800 return '?'; 801 } 802 /* Convenience. Treat POSIX -W foo same as long option --foo */ 803 if (temp[0] == 'W' && temp[1] == ';') 804 { 805 char *nameend; 806 const struct option *p; 807 const struct option *pfound = NULL; 808 int exact = 0; 809 int ambig = 0; 810 int indfound = 0; 811 int option_index; 812 813 /* This is an option that requires an argument. */ 814 if (*nextchar != '\0') 815 { 816 optarg = nextchar; 817 /* If we end this ARGV-element by taking the rest as an arg, 818 we must advance to the next element now. */ 819 optind++; 820 } 821 else if (optind == argc) 822 { 823 if (print_errors) 824 { 825 /* 1003.2 specifies the format of this message. */ 826 fprintf (stderr, _("%s: option requires an argument -- %c\n"), 827 argv[0], c); 828 } 829 optopt = c; 830 if (optstring[0] == ':') 831 c = ':'; 832 else 833 c = '?'; 834 return c; 835 } 836 else 837 /* We already incremented `optind' once; 838 increment it again when taking next ARGV-elt as argument. */ 839 optarg = argv[optind++]; 840 841 /* optarg is now the argument, see if it's in the 842 table of longopts. */ 843 844 for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++) 845 /* Do nothing. */ ; 846 847 /* Test all long options for either exact match 848 or abbreviated matches. */ 849 for (p = longopts, option_index = 0; p != NULL && p->name; p++, option_index++) 850 if (!strncmp (p->name, nextchar, nameend - nextchar)) 851 { 852 if ((unsigned int) (nameend - nextchar) == strlen (p->name)) 853 { 854 /* Exact match found. */ 855 pfound = p; 856 indfound = option_index; 857 exact = 1; 858 break; 859 } 860 else if (pfound == NULL) 861 { 862 /* First nonexact match found. */ 863 pfound = p; 864 indfound = option_index; 865 } 866 else 867 /* Second or later nonexact match found. */ 868 ambig = 1; 869 } 870 if (ambig && !exact) 871 { 872 if (print_errors) 873 fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"), 874 argv[0], argv[optind]); 875 nextchar += strlen (nextchar); 876 optind++; 877 return '?'; 878 } 879 if (pfound != NULL) 880 { 881 option_index = indfound; 882 if (*nameend) 883 { 884 /* Don't test has_arg with >, because some C compilers don't 885 allow it to be used on enums. */ 886 if (pfound->has_arg) 887 optarg = nameend + 1; 888 else 889 { 890 if (print_errors) 891 fprintf (stderr, _("\ 892%s: option `-W %s' doesn't allow an argument\n"), 893 argv[0], pfound->name); 894 895 nextchar += strlen (nextchar); 896 return '?'; 897 } 898 } 899 else if (pfound->has_arg == 1) 900 { 901 if (optind < argc) 902 optarg = argv[optind++]; 903 else 904 { 905 if (print_errors) 906 fprintf (stderr, 907 _("%s: option `%s' requires an argument\n"), 908 argv[0], argv[optind - 1]); 909 nextchar += strlen (nextchar); 910 return optstring[0] == ':' ? ':' : '?'; 911 } 912 } 913 nextchar += strlen (nextchar); 914 if (longind != NULL) 915 *longind = option_index; 916 if (pfound->flag) 917 { 918 *(pfound->flag) = pfound->val; 919 return 0; 920 } 921 return pfound->val; 922 } 923 nextchar = NULL; 924 return 'W'; /* Let the application handle it. */ 925 } 926 if (temp[1] == ':') 927 { 928 if (temp[2] == ':') 929 { 930 /* This is an option that accepts an argument optionally. */ 931 if (*nextchar != '\0') 932 { 933 optarg = nextchar; 934 optind++; 935 } 936 else 937 optarg = NULL; 938 nextchar = NULL; 939 } 940 else 941 { 942 /* This is an option that requires an argument. */ 943 if (*nextchar != '\0') 944 { 945 optarg = nextchar; 946 /* If we end this ARGV-element by taking the rest as an arg, 947 we must advance to the next element now. */ 948 optind++; 949 } 950 else if (optind == argc) 951 { 952 if (print_errors) 953 { 954 /* 1003.2 specifies the format of this message. */ 955 fprintf (stderr, 956 _("%s: option requires an argument -- %c\n"), 957 argv[0], c); 958 } 959 optopt = c; 960 if (optstring[0] == ':') 961 c = ':'; 962 else 963 c = '?'; 964 } 965 else 966 /* We already incremented `optind' once; 967 increment it again when taking next ARGV-elt as argument. */ 968 optarg = argv[optind++]; 969 nextchar = NULL; 970 } 971 } 972 return c; 973 } 974} 975 976int 977getopt (argc, argv, optstring) 978 int argc; 979 char *const *argv; 980 const char *optstring; 981{ 982 return _getopt_internal (argc, argv, optstring, 983 (const struct option *) 0, 984 (int *) 0, 985 0); 986} 987 988#endif /* Not ELIDE_CODE. */ 989 990#ifdef TEST 991 992/* Compile with -DTEST to make an executable for use in testing 993 the above definition of `getopt'. */ 994 995int 996main (argc, argv) 997 int argc; 998 char **argv; 999{ 1000 int c; 1001 int digit_optind = 0; 1002 1003 while (1) 1004 { 1005 int this_option_optind = optind ? optind : 1; 1006 1007 c = getopt (argc, argv, "abc:d:0123456789"); 1008 if (c == -1) 1009 break; 1010 1011 switch (c) 1012 { 1013 case '0': 1014 case '1': 1015 case '2': 1016 case '3': 1017 case '4': 1018 case '5': 1019 case '6': 1020 case '7': 1021 case '8': 1022 case '9': 1023 if (digit_optind != 0 && digit_optind != this_option_optind) 1024 printf ("digits occur in two different argv-elements.\n"); 1025 digit_optind = this_option_optind; 1026 printf ("option %c\n", c); 1027 break; 1028 1029 case 'a': 1030 printf ("option a\n"); 1031 break; 1032 1033 case 'b': 1034 printf ("option b\n"); 1035 break; 1036 1037 case 'c': 1038 printf ("option c with value `%s'\n", optarg); 1039 break; 1040 1041 case '?': 1042 break; 1043 1044 default: 1045 printf ("?? getopt returned character code 0%o ??\n", c); 1046 } 1047 } 1048 1049 if (optind < argc) 1050 { 1051 printf ("non-option ARGV-elements: "); 1052 while (optind < argc) 1053 printf ("%s ", argv[optind++]); 1054 printf ("\n"); 1055 } 1056 1057 exit (0); 1058} 1059 1060#endif /* TEST */ 1061