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 6 Copyright (C) 1987, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 2000 7 Free Software Foundation, Inc. 8 9 The GNU C Library is free software; you can redistribute it and/or 10 modify it under the terms of the GNU Library General Public License as 11 published by the Free Software Foundation; either version 2 of the 12 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 Library General Public License for more details. 18 19 You should have received a copy of the GNU Library General Public 20 License along with the GNU C Library; see the file COPYING.LIB. If not, 21 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, 22 Boston, MA 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 When compiling libc, the _ macro is predefined. */ 82# ifdef HAVE_LIBINTL_H 83# include <libintl.h> 84# define _(msgid) gettext (msgid) 85# else 86# define _(msgid) (msgid) 87# endif 88#endif 89 90/* This version of `getopt' appears to the caller like standard Unix `getopt' 91 but it behaves differently for the user, since it allows the user 92 to intersperse the options with the other arguments. 93 94 As `getopt' works, it permutes the elements of ARGV so that, 95 when it is done, all the options precede everything else. Thus 96 all application programs are extended to handle flexible argument order. 97 98 Setting the environment variable POSIXLY_CORRECT disables permutation. 99 Then the behavior is completely standard. 100 101 GNU application programs can use a third alternative mode in which 102 they can distinguish the relative order of options and other arguments. */ 103 104#include "getopt.h" 105 106/* For communication from `getopt' to the caller. 107 When `getopt' finds an option that takes an argument, 108 the argument value is returned here. 109 Also, when `ordering' is RETURN_IN_ORDER, 110 each non-option ARGV-element is returned here. */ 111 112char *optarg; 113 114/* Index in ARGV of the next element to be scanned. 115 This is used for communication to and from the caller 116 and for communication between successive calls to `getopt'. 117 118 On entry to `getopt', zero means this is the first call; initialize. 119 120 When `getopt' returns -1, this is the index of the first of the 121 non-option elements that the caller should itself scan. 122 123 Otherwise, `optind' communicates from one call to the next 124 how much of ARGV has been scanned so far. */ 125 126/* 1003.2 says this must be 1 before any call. */ 127int optind = 1; 128 129/* Formerly, initialization of getopt depended on optind==0, which 130 causes problems with re-calling getopt as programs generally don't 131 know that. */ 132 133int __getopt_initialized; 134 135/* The next char to be scanned in the option-element 136 in which the last option character we returned was found. 137 This allows us to pick up the scan where we left off. 138 139 If this is zero, or a null string, it means resume the scan 140 by advancing to the next ARGV-element. */ 141 142static char *nextchar; 143 144/* Callers store zero here to inhibit the error message 145 for unrecognized options. */ 146 147int opterr = 1; 148 149/* Set to an option character which was unrecognized. 150 This must be initialized on some systems to avoid linking in the 151 system's own getopt implementation. */ 152 153int optopt = '?'; 154 155/* Describe how to deal with options that follow non-option ARGV-elements. 156 157 If the caller did not specify anything, 158 the default is REQUIRE_ORDER if the environment variable 159 POSIXLY_CORRECT is defined, PERMUTE otherwise. 160 161 REQUIRE_ORDER means don't recognize them as options; 162 stop option processing when the first non-option is seen. 163 This is what Unix does. 164 This mode of operation is selected by either setting the environment 165 variable POSIXLY_CORRECT, or using `+' as the first character 166 of the list of option characters. 167 168 PERMUTE is the default. We permute the contents of ARGV as we scan, 169 so that eventually all the non-options are at the end. This allows options 170 to be given in any order, even with programs that were not written to 171 expect this. 172 173 RETURN_IN_ORDER is an option available to programs that were written 174 to expect options and other ARGV-elements in any order and that care about 175 the ordering of the two. We describe each non-option ARGV-element 176 as if it were the argument of an option with character code 1. 177 Using `-' as the first character of the list of option characters 178 selects this mode of operation. 179 180 The special argument `--' forces an end of option-scanning regardless 181 of the value of `ordering'. In the case of RETURN_IN_ORDER, only 182 `--' can cause `getopt' to return -1 with `optind' != ARGC. */ 183 184static enum 185{ 186 REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER 187} ordering; 188 189/* Value of POSIXLY_CORRECT environment variable. */ 190static char *posixly_correct; 191 192#ifdef __GNU_LIBRARY__ 193/* We want to avoid inclusion of string.h with non-GNU libraries 194 because there are many ways it can cause trouble. 195 On some systems, it contains special magic macros that don't work 196 in GCC. */ 197# include <string.h> 198# define my_index strchr 199#else 200 201# if HAVE_STRING_H 202# include <string.h> 203# else 204# include <strings.h> 205# endif 206 207/* Avoid depending on library functions or files 208 whose names are inconsistent. */ 209 210#ifndef getenv 211extern char *getenv (); 212#endif 213 214static char * 215my_index (str, chr) 216 const char *str; 217 int chr; 218{ 219 while (*str) 220 { 221 if (*str == chr) 222 return (char *) str; 223 str++; 224 } 225 return 0; 226} 227 228/* If using GCC, we can safely declare strlen this way. 229 If not using GCC, it is ok not to declare it. */ 230#ifdef __GNUC__ 231/* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h. 232 That was relevant to code that was here before. */ 233# if (!defined __STDC__ || !__STDC__) && !defined strlen 234/* gcc with -traditional declares the built-in strlen to return int, 235 and has done so at least since version 2.4.5. -- rms. */ 236extern int strlen (const char *); 237# endif /* not __STDC__ */ 238#endif /* __GNUC__ */ 239 240#endif /* not __GNU_LIBRARY__ */ 241 242/* Handle permutation of arguments. */ 243 244/* Describe the part of ARGV that contains non-options that have 245 been skipped. `first_nonopt' is the index in ARGV of the first of them; 246 `last_nonopt' is the index after the last of them. */ 247 248static int first_nonopt; 249static int last_nonopt; 250 251#ifdef _LIBC 252/* Bash 2.0 gives us an environment variable containing flags 253 indicating ARGV elements that should not be considered arguments. */ 254 255/* Defined in getopt_init.c */ 256extern char *__getopt_nonoption_flags; 257 258static int nonoption_flags_max_len; 259static int nonoption_flags_len; 260 261static int original_argc; 262static char *const *original_argv; 263 264/* Make sure the environment variable bash 2.0 puts in the environment 265 is valid for the getopt call we must make sure that the ARGV passed 266 to getopt is that one passed to the process. */ 267static void 268__attribute__ ((unused)) 269store_args_and_env (int argc, char *const *argv) 270{ 271 /* XXX This is no good solution. We should rather copy the args so 272 that we can compare them later. But we must not use malloc(3). */ 273 original_argc = argc; 274 original_argv = argv; 275} 276# ifdef text_set_element 277text_set_element (__libc_subinit, store_args_and_env); 278# endif /* text_set_element */ 279 280# define SWAP_FLAGS(ch1, ch2) \ 281 if (nonoption_flags_len > 0) \ 282 { \ 283 char __tmp = __getopt_nonoption_flags[ch1]; \ 284 __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \ 285 __getopt_nonoption_flags[ch2] = __tmp; \ 286 } 287#else /* !_LIBC */ 288# define SWAP_FLAGS(ch1, ch2) 289#endif /* _LIBC */ 290 291/* Exchange two adjacent subsequences of ARGV. 292 One subsequence is elements [first_nonopt,last_nonopt) 293 which contains all the non-options that have been skipped so far. 294 The other is elements [last_nonopt,optind), which contains all 295 the options processed since those non-options were skipped. 296 297 `first_nonopt' and `last_nonopt' are relocated so that they describe 298 the new indices of the non-options in ARGV after they are moved. */ 299 300#if defined __STDC__ && __STDC__ 301static void exchange (char **); 302#endif 303 304static void 305exchange (argv) 306 char **argv; 307{ 308 int bottom = first_nonopt; 309 int middle = last_nonopt; 310 int top = optind; 311 char *tem; 312 313 /* Exchange the shorter segment with the far end of the longer segment. 314 That puts the shorter segment into the right place. 315 It leaves the longer segment in the right place overall, 316 but it consists of two parts that need to be swapped next. */ 317 318#ifdef _LIBC 319 /* First make sure the handling of the `__getopt_nonoption_flags' 320 string can work normally. Our top argument must be in the range 321 of the string. */ 322 if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len) 323 { 324 /* We must extend the array. The user plays games with us and 325 presents new arguments. */ 326 char *new_str = malloc (top + 1); 327 if (new_str == NULL) 328 nonoption_flags_len = nonoption_flags_max_len = 0; 329 else 330 { 331 memset (__mempcpy (new_str, __getopt_nonoption_flags, 332 nonoption_flags_max_len), 333 '\0', top + 1 - nonoption_flags_max_len); 334 nonoption_flags_max_len = top + 1; 335 __getopt_nonoption_flags = new_str; 336 } 337 } 338#endif 339 340 while (top > middle && middle > bottom) 341 { 342 if (top - middle > middle - bottom) 343 { 344 /* Bottom segment is the short one. */ 345 int len = middle - bottom; 346 register int i; 347 348 /* Swap it with the top part of the top segment. */ 349 for (i = 0; i < len; i++) 350 { 351 tem = argv[bottom + i]; 352 argv[bottom + i] = argv[top - (middle - bottom) + i]; 353 argv[top - (middle - bottom) + i] = tem; 354 SWAP_FLAGS (bottom + i, top - (middle - bottom) + i); 355 } 356 /* Exclude the moved bottom segment from further swapping. */ 357 top -= len; 358 } 359 else 360 { 361 /* Top segment is the short one. */ 362 int len = top - middle; 363 register int i; 364 365 /* Swap it with the bottom part of the bottom segment. */ 366 for (i = 0; i < len; i++) 367 { 368 tem = argv[bottom + i]; 369 argv[bottom + i] = argv[middle + i]; 370 argv[middle + i] = tem; 371 SWAP_FLAGS (bottom + i, middle + i); 372 } 373 /* Exclude the moved top segment from further swapping. */ 374 bottom += len; 375 } 376 } 377 378 /* Update records for the slots the non-options now occupy. */ 379 380 first_nonopt += (optind - last_nonopt); 381 last_nonopt = optind; 382} 383 384/* Initialize the internal data when the first call is made. */ 385 386#if defined __STDC__ && __STDC__ 387static const char *_getopt_initialize (int, char *const *, const char *); 388#endif 389static const char * 390_getopt_initialize (argc, argv, optstring) 391 int argc; 392 char *const *argv; 393 const char *optstring; 394{ 395 /* Start processing options with ARGV-element 1 (since ARGV-element 0 396 is the program name); the sequence of previously skipped 397 non-option ARGV-elements is empty. */ 398 399 first_nonopt = last_nonopt = optind; 400 401 nextchar = NULL; 402 403 posixly_correct = getenv ("POSIXLY_CORRECT"); 404 405 /* Determine how to handle the ordering of options and nonoptions. */ 406 407 if (optstring[0] == '-') 408 { 409 ordering = RETURN_IN_ORDER; 410 ++optstring; 411 } 412 else if (optstring[0] == '+') 413 { 414 ordering = REQUIRE_ORDER; 415 ++optstring; 416 } 417 else if (posixly_correct != NULL) 418 ordering = REQUIRE_ORDER; 419 else 420 ordering = PERMUTE; 421 422#ifdef _LIBC 423 if (posixly_correct == NULL 424 && argc == original_argc && argv == original_argv) 425 { 426 if (nonoption_flags_max_len == 0) 427 { 428 if (__getopt_nonoption_flags == NULL 429 || __getopt_nonoption_flags[0] == '\0') 430 nonoption_flags_max_len = -1; 431 else 432 { 433 const char *orig_str = __getopt_nonoption_flags; 434 int len = nonoption_flags_max_len = strlen (orig_str); 435 if (nonoption_flags_max_len < argc) 436 nonoption_flags_max_len = argc; 437 __getopt_nonoption_flags = 438 (char *) malloc (nonoption_flags_max_len); 439 if (__getopt_nonoption_flags == NULL) 440 nonoption_flags_max_len = -1; 441 else 442 memset (__mempcpy (__getopt_nonoption_flags, orig_str, len), 443 '\0', nonoption_flags_max_len - len); 444 } 445 } 446 nonoption_flags_len = nonoption_flags_max_len; 447 } 448 else 449 nonoption_flags_len = 0; 450#endif 451 452 return optstring; 453} 454 455/* Scan elements of ARGV (whose length is ARGC) for option characters 456 given in OPTSTRING. 457 458 If an element of ARGV starts with '-', and is not exactly "-" or "--", 459 then it is an option element. The characters of this element 460 (aside from the initial '-') are option characters. If `getopt' 461 is called repeatedly, it returns successively each of the option characters 462 from each of the option elements. 463 464 If `getopt' finds another option character, it returns that character, 465 updating `optind' and `nextchar' so that the next call to `getopt' can 466 resume the scan with the following option character or ARGV-element. 467 468 If there are no more option characters, `getopt' returns -1. 469 Then `optind' is the index in ARGV of the first ARGV-element 470 that is not an option. (The ARGV-elements have been permuted 471 so that those that are not options now come last.) 472 473 OPTSTRING is a string containing the legitimate option characters. 474 If an option character is seen that is not listed in OPTSTRING, 475 return '?' after printing an error message. If you set `opterr' to 476 zero, the error message is suppressed but we still return '?'. 477 478 If a char in OPTSTRING is followed by a colon, that means it wants an arg, 479 so the following text in the same ARGV-element, or the text of the following 480 ARGV-element, is returned in `optarg'. Two colons mean an option that 481 wants an optional arg; if there is text in the current ARGV-element, 482 it is returned in `optarg', otherwise `optarg' is set to zero. 483 484 If OPTSTRING starts with `-' or `+', it requests different methods of 485 handling the non-option ARGV-elements. 486 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above. 487 488 Long-named options begin with `--' instead of `-'. 489 Their names may be abbreviated as long as the abbreviation is unique 490 or is an exact match for some defined option. If they have an 491 argument, it follows the option name in the same ARGV-element, separated 492 from the option name by a `=', or else the in next ARGV-element. 493 When `getopt' finds a long-named option, it returns 0 if that option's 494 `flag' field is nonzero, the value of the option's `val' field 495 if the `flag' field is zero. 496 497 The elements of ARGV aren't really const, because we permute them. 498 But we pretend they're const in the prototype to be compatible 499 with other systems. 500 501 LONGOPTS is a vector of `struct option' terminated by an 502 element containing a name which is zero. 503 504 LONGIND returns the index in LONGOPT of the long-named option found. 505 It is only valid when a long-named option has been found by the most 506 recent call. 507 508 If LONG_ONLY is nonzero, '-' as well as '--' can introduce 509 long-named options. */ 510 511int 512_getopt_internal (argc, argv, optstring, longopts, longind, long_only) 513 int argc; 514 char *const *argv; 515 const char *optstring; 516 const struct option *longopts; 517 int *longind; 518 int long_only; 519{ 520 int print_errors = opterr; 521 if (optstring[0] == ':') 522 print_errors = 0; 523 524 optarg = NULL; 525 526 if (optind == 0 || !__getopt_initialized) 527 { 528 if (optind == 0) 529 optind = 1; /* Don't scan ARGV[0], the program name. */ 530 optstring = _getopt_initialize (argc, argv, optstring); 531 __getopt_initialized = 1; 532 } 533 534 /* Test whether ARGV[optind] points to a non-option argument. 535 Either it does not have option syntax, or there is an environment flag 536 from the shell indicating it is not an option. The later information 537 is only used when the used in the GNU libc. */ 538#ifdef _LIBC 539# define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \ 540 || (optind < nonoption_flags_len \ 541 && __getopt_nonoption_flags[optind] == '1')) 542#else 543# define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0') 544#endif 545 546 if (nextchar == NULL || *nextchar == '\0') 547 { 548 /* Advance to the next ARGV-element. */ 549 550 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been 551 moved back by the user (who may also have changed the arguments). */ 552 if (last_nonopt > optind) 553 last_nonopt = optind; 554 if (first_nonopt > optind) 555 first_nonopt = optind; 556 557 if (ordering == PERMUTE) 558 { 559 /* If we have just processed some options following some non-options, 560 exchange them so that the options come first. */ 561 562 if (first_nonopt != last_nonopt && last_nonopt != optind) 563 exchange ((char **) argv); 564 else if (last_nonopt != optind) 565 first_nonopt = optind; 566 567 /* Skip any additional non-options 568 and extend the range of non-options previously skipped. */ 569 570 while (optind < argc && NONOPTION_P) 571 optind++; 572 last_nonopt = optind; 573 } 574 575 /* The special ARGV-element `--' means premature end of options. 576 Skip it like a null option, 577 then exchange with previous non-options as if it were an option, 578 then skip everything else like a non-option. */ 579 580 if (optind != argc && !strcmp (argv[optind], "--")) 581 { 582 optind++; 583 584 if (first_nonopt != last_nonopt && last_nonopt != optind) 585 exchange ((char **) argv); 586 else if (first_nonopt == last_nonopt) 587 first_nonopt = optind; 588 last_nonopt = argc; 589 590 optind = argc; 591 } 592 593 /* If we have done all the ARGV-elements, stop the scan 594 and back over any non-options that we skipped and permuted. */ 595 596 if (optind == argc) 597 { 598 /* Set the next-arg-index to point at the non-options 599 that we previously skipped, so the caller will digest them. */ 600 if (first_nonopt != last_nonopt) 601 optind = first_nonopt; 602 return -1; 603 } 604 605 /* If we have come to a non-option and did not permute it, 606 either stop the scan or describe it to the caller and pass it by. */ 607 608 if (NONOPTION_P) 609 { 610 if (ordering == REQUIRE_ORDER) 611 return -1; 612 optarg = argv[optind++]; 613 return 1; 614 } 615 616 /* We have found another option-ARGV-element. 617 Skip the initial punctuation. */ 618 619 nextchar = (argv[optind] + 1 620 + (longopts != NULL && argv[optind][1] == '-')); 621 } 622 623 /* Decode the current option-ARGV-element. */ 624 625 /* Check whether the ARGV-element is a long option. 626 627 If long_only and the ARGV-element has the form "-f", where f is 628 a valid short option, don't consider it an abbreviated form of 629 a long option that starts with f. Otherwise there would be no 630 way to give the -f short option. 631 632 On the other hand, if there's a long option "fubar" and 633 the ARGV-element is "-fu", do consider that an abbreviation of 634 the long option, just like "--fu", and not "-f" with arg "u". 635 636 This distinction seems to be the most useful approach. */ 637 638 if (longopts != NULL 639 && (argv[optind][1] == '-' 640 || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1]))))) 641 { 642 char *nameend; 643 const struct option *p; 644 const struct option *pfound = NULL; 645 int exact = 0; 646 int ambig = 0; 647 int indfound = -1; 648 int option_index; 649 650 for (nameend = nextchar; *nameend && *nameend != '='; nameend++) 651 /* Do nothing. */ ; 652 653 /* Test all long options for either exact match 654 or abbreviated matches. */ 655 for (p = longopts, option_index = 0; p->name; p++, option_index++) 656 if (!strncmp (p->name, nextchar, nameend - nextchar)) 657 { 658 if ((unsigned int) (nameend - nextchar) 659 == (unsigned int) strlen (p->name)) 660 { 661 /* Exact match found. */ 662 pfound = p; 663 indfound = option_index; 664 exact = 1; 665 break; 666 } 667 else if (pfound == NULL) 668 { 669 /* First nonexact match found. */ 670 pfound = p; 671 indfound = option_index; 672 } 673 else 674 /* Second or later nonexact match found. */ 675 ambig = 1; 676 } 677 678 if (ambig && !exact) 679 { 680 if (print_errors) 681 fprintf (stderr, _("%s: option `%s' is ambiguous\n"), 682 argv[0], argv[optind]); 683 nextchar += strlen (nextchar); 684 optind++; 685 optopt = 0; 686 return '?'; 687 } 688 689 if (pfound != NULL) 690 { 691 option_index = indfound; 692 optind++; 693 if (*nameend) 694 { 695 /* Don't test has_arg with >, because some C compilers don't 696 allow it to be used on enums. */ 697 if (pfound->has_arg) 698 optarg = nameend + 1; 699 else 700 { 701 if (print_errors) 702 { 703 if (argv[optind - 1][1] == '-') 704 /* --option */ 705 fprintf (stderr, 706 _("%s: option `--%s' doesn't allow an argument\n"), 707 argv[0], pfound->name); 708 else 709 /* +option or -option */ 710 fprintf (stderr, 711 _("%s: option `%c%s' doesn't allow an argument\n"), 712 argv[0], argv[optind - 1][0], pfound->name); 713 } 714 715 nextchar += strlen (nextchar); 716 717 optopt = pfound->val; 718 return '?'; 719 } 720 } 721 else if (pfound->has_arg == 1) 722 { 723 if (optind < argc) 724 optarg = argv[optind++]; 725 else 726 { 727 if (print_errors) 728 fprintf (stderr, 729 _("%s: option `%s' requires an argument\n"), 730 argv[0], argv[optind - 1]); 731 nextchar += strlen (nextchar); 732 optopt = pfound->val; 733 return optstring[0] == ':' ? ':' : '?'; 734 } 735 } 736 nextchar += strlen (nextchar); 737 if (longind != NULL) 738 *longind = option_index; 739 if (pfound->flag) 740 { 741 *(pfound->flag) = pfound->val; 742 return 0; 743 } 744 return pfound->val; 745 } 746 747 /* Can't find it as a long option. If this is not getopt_long_only, 748 or the option starts with '--' or is not a valid short 749 option, then it's an error. 750 Otherwise interpret it as a short option. */ 751 if (!long_only || argv[optind][1] == '-' 752 || my_index (optstring, *nextchar) == NULL) 753 { 754 if (print_errors) 755 { 756 if (argv[optind][1] == '-') 757 /* --option */ 758 fprintf (stderr, _("%s: unrecognized option `--%s'\n"), 759 argv[0], nextchar); 760 else 761 /* +option or -option */ 762 fprintf (stderr, _("%s: unrecognized option `%c%s'\n"), 763 argv[0], argv[optind][0], nextchar); 764 } 765 nextchar = (char *) ""; 766 optind++; 767 optopt = 0; 768 return '?'; 769 } 770 } 771 772 /* Look at and handle the next short option-character. */ 773 774 { 775 char c = *nextchar++; 776 char *temp = my_index (optstring, c); 777 778 /* Increment `optind' when we start to process its last character. */ 779 if (*nextchar == '\0') 780 ++optind; 781 782 if (temp == NULL || c == ':') 783 { 784 if (print_errors) 785 { 786 if (posixly_correct) 787 /* 1003.2 specifies the format of this message. */ 788 fprintf (stderr, _("%s: illegal option -- %c\n"), 789 argv[0], c); 790 else 791 fprintf (stderr, _("%s: invalid option -- %c\n"), 792 argv[0], c); 793 } 794 optopt = c; 795 return '?'; 796 } 797 /* Convenience. Treat POSIX -W foo same as long option --foo */ 798 if (temp[0] == 'W' && temp[1] == ';') 799 { 800 char *nameend; 801 const struct option *p; 802 const struct option *pfound = NULL; 803 int exact = 0; 804 int ambig = 0; 805 int indfound = 0; 806 int option_index; 807 808 /* This is an option that requires an argument. */ 809 if (*nextchar != '\0') 810 { 811 optarg = nextchar; 812 /* If we end this ARGV-element by taking the rest as an arg, 813 we must advance to the next element now. */ 814 optind++; 815 } 816 else if (optind == argc) 817 { 818 if (print_errors) 819 { 820 /* 1003.2 specifies the format of this message. */ 821 fprintf (stderr, _("%s: option requires an argument -- %c\n"), 822 argv[0], c); 823 } 824 optopt = c; 825 if (optstring[0] == ':') 826 c = ':'; 827 else 828 c = '?'; 829 return c; 830 } 831 else 832 /* We already incremented `optind' once; 833 increment it again when taking next ARGV-elt as argument. */ 834 optarg = argv[optind++]; 835 836 /* optarg is now the argument, see if it's in the 837 table of longopts. */ 838 839 for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++) 840 /* Do nothing. */ ; 841 842 /* Test all long options for either exact match 843 or abbreviated matches. */ 844 for (p = longopts, option_index = 0; p->name; p++, option_index++) 845 if (!strncmp (p->name, nextchar, nameend - nextchar)) 846 { 847 if ((unsigned int) (nameend - nextchar) == strlen (p->name)) 848 { 849 /* Exact match found. */ 850 pfound = p; 851 indfound = option_index; 852 exact = 1; 853 break; 854 } 855 else if (pfound == NULL) 856 { 857 /* First nonexact match found. */ 858 pfound = p; 859 indfound = option_index; 860 } 861 else 862 /* Second or later nonexact match found. */ 863 ambig = 1; 864 } 865 if (ambig && !exact) 866 { 867 if (print_errors) 868 fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"), 869 argv[0], argv[optind]); 870 nextchar += strlen (nextchar); 871 optind++; 872 return '?'; 873 } 874 if (pfound != NULL) 875 { 876 option_index = indfound; 877 if (*nameend) 878 { 879 /* Don't test has_arg with >, because some C compilers don't 880 allow it to be used on enums. */ 881 if (pfound->has_arg) 882 optarg = nameend + 1; 883 else 884 { 885 if (print_errors) 886 fprintf (stderr, _("\ 887%s: option `-W %s' doesn't allow an argument\n"), 888 argv[0], pfound->name); 889 890 nextchar += strlen (nextchar); 891 return '?'; 892 } 893 } 894 else if (pfound->has_arg == 1) 895 { 896 if (optind < argc) 897 optarg = argv[optind++]; 898 else 899 { 900 if (print_errors) 901 fprintf (stderr, 902 _("%s: option `%s' requires an argument\n"), 903 argv[0], argv[optind - 1]); 904 nextchar += strlen (nextchar); 905 return optstring[0] == ':' ? ':' : '?'; 906 } 907 } 908 nextchar += strlen (nextchar); 909 if (longind != NULL) 910 *longind = option_index; 911 if (pfound->flag) 912 { 913 *(pfound->flag) = pfound->val; 914 return 0; 915 } 916 return pfound->val; 917 } 918 nextchar = NULL; 919 return 'W'; /* Let the application handle it. */ 920 } 921 if (temp[1] == ':') 922 { 923 if (temp[2] == ':') 924 { 925 /* This is an option that accepts an argument optionally. */ 926 if (*nextchar != '\0') 927 { 928 optarg = nextchar; 929 optind++; 930 } 931 else 932 optarg = NULL; 933 nextchar = NULL; 934 } 935 else 936 { 937 /* This is an option that requires an argument. */ 938 if (*nextchar != '\0') 939 { 940 optarg = nextchar; 941 /* If we end this ARGV-element by taking the rest as an arg, 942 we must advance to the next element now. */ 943 optind++; 944 } 945 else if (optind == argc) 946 { 947 if (print_errors) 948 { 949 /* 1003.2 specifies the format of this message. */ 950 fprintf (stderr, 951 _("%s: option requires an argument -- %c\n"), 952 argv[0], c); 953 } 954 optopt = c; 955 if (optstring[0] == ':') 956 c = ':'; 957 else 958 c = '?'; 959 } 960 else 961 /* We already incremented `optind' once; 962 increment it again when taking next ARGV-elt as argument. */ 963 optarg = argv[optind++]; 964 nextchar = NULL; 965 } 966 } 967 return c; 968 } 969} 970 971int 972getopt (argc, argv, optstring) 973 int argc; 974 char *const *argv; 975 const char *optstring; 976{ 977 return _getopt_internal (argc, argv, optstring, 978 (const struct option *) 0, 979 (int *) 0, 980 0); 981} 982 983#endif /* Not ELIDE_CODE. */ 984 985#ifdef TEST 986 987/* Compile with -DTEST to make an executable for use in testing 988 the above definition of `getopt'. */ 989 990int 991main (argc, argv) 992 int argc; 993 char **argv; 994{ 995 int c; 996 int digit_optind = 0; 997 998 while (1) 999 { 1000 int this_option_optind = optind ? optind : 1; 1001 1002 c = getopt (argc, argv, "abc:d:0123456789"); 1003 if (c == -1) 1004 break; 1005 1006 switch (c) 1007 { 1008 case '0': 1009 case '1': 1010 case '2': 1011 case '3': 1012 case '4': 1013 case '5': 1014 case '6': 1015 case '7': 1016 case '8': 1017 case '9': 1018 if (digit_optind != 0 && digit_optind != this_option_optind) 1019 printf ("digits occur in two different argv-elements.\n"); 1020 digit_optind = this_option_optind; 1021 printf ("option %c\n", c); 1022 break; 1023 1024 case 'a': 1025 printf ("option a\n"); 1026 break; 1027 1028 case 'b': 1029 printf ("option b\n"); 1030 break; 1031 1032 case 'c': 1033 printf ("option c with value `%s'\n", optarg); 1034 break; 1035 1036 case '?': 1037 break; 1038 1039 default: 1040 printf ("?? getopt returned character code 0%o ??\n", c); 1041 } 1042 } 1043 1044 if (optind < argc) 1045 { 1046 printf ("non-option ARGV-elements: "); 1047 while (optind < argc) 1048 printf ("%s ", argv[optind++]); 1049 printf ("\n"); 1050 } 1051 1052 exit (0); 1053} 1054 1055#endif /* TEST */ 1056