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 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 2, or (at your option) 12 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, write to the Free Software Foundation, 21 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 22 23/* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>. 24 Ditto for AIX 3.2 and <stdlib.h>. */ 25#ifndef _NO_PROTO 26# define _NO_PROTO 27#endif 28 29#ifdef HAVE_CONFIG_H 30# include <config.h> 31#endif 32 33#if !defined __STDC__ || !__STDC__ 34/* This is a separate conditional since some stdc systems 35 reject `defined (const)'. */ 36# ifndef const 37# define const 38# endif 39#endif 40 41#include <stdio.h> 42 43/* Comment out all this code if we are using the GNU C Library, and are not 44 actually compiling the library itself. This code is part of the GNU C 45 Library, but also included in many other GNU distributions. Compiling 46 and linking in this code is a waste when using the GNU C library 47 (especially if it is a shared library). Rather than having every GNU 48 program understand `configure --with-gnu-libc' and omit the object files, 49 it is simpler to just do this in the source for each such file. */ 50 51#define GETOPT_INTERFACE_VERSION 2 52#if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2 53# include <gnu-versions.h> 54# if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION 55# define ELIDE_CODE 56# endif 57#endif 58 59#ifndef ELIDE_CODE 60 61 62/* This needs to come after some library #include 63 to get __GNU_LIBRARY__ defined. */ 64#ifdef __GNU_LIBRARY__ 65/* Don't include stdlib.h for non-GNU C libraries because some of them 66 contain conflicting prototypes for getopt. */ 67# include <stdlib.h> 68# include <unistd.h> 69#endif /* GNU C library. */ 70 71#ifdef VMS 72# include <unixlib.h> 73# if HAVE_STRING_H - 0 74# include <string.h> 75# endif 76#endif 77 78#ifndef _ 79/* This is for other GNU distributions with internationalized messages. */ 80# if (HAVE_LIBINTL_H && ENABLE_NLS) || defined _LIBC 81# include <libintl.h> 82# ifndef _ 83# define _(msgid) gettext (msgid) 84# endif 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#ifdef USE_NONOPTION_FLAGS 256/* Defined in getopt_init.c */ 257extern char *__getopt_nonoption_flags; 258 259static int nonoption_flags_max_len; 260static int nonoption_flags_len; 261#endif 262 263static int original_argc; 264static char *const *original_argv; 265 266/* Make sure the environment variable bash 2.0 puts in the environment 267 is valid for the getopt call we must make sure that the ARGV passed 268 to getopt is that one passed to the process. */ 269static void 270__attribute__ ((unused)) 271store_args_and_env (int argc, char *const *argv) 272{ 273 /* XXX This is no good solution. We should rather copy the args so 274 that we can compare them later. But we must not use malloc(3). */ 275 original_argc = argc; 276 original_argv = argv; 277} 278# ifdef text_set_element 279text_set_element (__libc_subinit, store_args_and_env); 280# endif /* text_set_element */ 281 282# ifdef USE_NONOPTION_FLAGS 283# define SWAP_FLAGS(ch1, ch2) \ 284 if (nonoption_flags_len > 0) \ 285 { \ 286 char __tmp = __getopt_nonoption_flags[ch1]; \ 287 __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \ 288 __getopt_nonoption_flags[ch2] = __tmp; \ 289 } 290# else 291# define SWAP_FLAGS(ch1, ch2) 292# endif 293#else /* !_LIBC */ 294# define SWAP_FLAGS(ch1, ch2) 295#endif /* _LIBC */ 296 297/* Exchange two adjacent subsequences of ARGV. 298 One subsequence is elements [first_nonopt,last_nonopt) 299 which contains all the non-options that have been skipped so far. 300 The other is elements [last_nonopt,optind), which contains all 301 the options processed since those non-options were skipped. 302 303 `first_nonopt' and `last_nonopt' are relocated so that they describe 304 the new indices of the non-options in ARGV after they are moved. */ 305 306#if defined __STDC__ && __STDC__ 307static void exchange (char **); 308#endif 309 310static void 311exchange (argv) 312 char **argv; 313{ 314 int bottom = first_nonopt; 315 int middle = last_nonopt; 316 int top = optind; 317 char *tem; 318 319 /* Exchange the shorter segment with the far end of the longer segment. 320 That puts the shorter segment into the right place. 321 It leaves the longer segment in the right place overall, 322 but it consists of two parts that need to be swapped next. */ 323 324#if defined _LIBC && defined USE_NONOPTION_FLAGS 325 /* First make sure the handling of the `__getopt_nonoption_flags' 326 string can work normally. Our top argument must be in the range 327 of the string. */ 328 if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len) 329 { 330 /* We must extend the array. The user plays games with us and 331 presents new arguments. */ 332 char *new_str = malloc (top + 1); 333 if (new_str == NULL) 334 nonoption_flags_len = nonoption_flags_max_len = 0; 335 else 336 { 337 memset (__mempcpy (new_str, __getopt_nonoption_flags, 338 nonoption_flags_max_len), 339 '\0', top + 1 - nonoption_flags_max_len); 340 nonoption_flags_max_len = top + 1; 341 __getopt_nonoption_flags = new_str; 342 } 343 } 344#endif 345 346 while (top > middle && middle > bottom) 347 { 348 if (top - middle > middle - bottom) 349 { 350 /* Bottom segment is the short one. */ 351 int len = middle - bottom; 352 register int i; 353 354 /* Swap it with the top part of the top segment. */ 355 for (i = 0; i < len; i++) 356 { 357 tem = argv[bottom + i]; 358 argv[bottom + i] = argv[top - (middle - bottom) + i]; 359 argv[top - (middle - bottom) + i] = tem; 360 SWAP_FLAGS (bottom + i, top - (middle - bottom) + i); 361 } 362 /* Exclude the moved bottom segment from further swapping. */ 363 top -= len; 364 } 365 else 366 { 367 /* Top segment is the short one. */ 368 int len = top - middle; 369 register int i; 370 371 /* Swap it with the bottom part of the bottom segment. */ 372 for (i = 0; i < len; i++) 373 { 374 tem = argv[bottom + i]; 375 argv[bottom + i] = argv[middle + i]; 376 argv[middle + i] = tem; 377 SWAP_FLAGS (bottom + i, middle + i); 378 } 379 /* Exclude the moved top segment from further swapping. */ 380 bottom += len; 381 } 382 } 383 384 /* Update records for the slots the non-options now occupy. */ 385 386 first_nonopt += (optind - last_nonopt); 387 last_nonopt = optind; 388} 389 390/* Initialize the internal data when the first call is made. */ 391 392#if defined __STDC__ && __STDC__ 393static const char *_getopt_initialize (int, char *const *, const char *); 394#endif 395static const char * 396_getopt_initialize (argc, argv, optstring) 397 int argc; 398 char *const *argv; 399 const char *optstring; 400{ 401 /* Start processing options with ARGV-element 1 (since ARGV-element 0 402 is the program name); the sequence of previously skipped 403 non-option ARGV-elements is empty. */ 404 405 first_nonopt = last_nonopt = optind; 406 407 nextchar = NULL; 408 409 posixly_correct = getenv ("POSIXLY_CORRECT"); 410 411 /* Determine how to handle the ordering of options and nonoptions. */ 412 413 if (optstring[0] == '-') 414 { 415 ordering = RETURN_IN_ORDER; 416 ++optstring; 417 } 418 else if (optstring[0] == '+') 419 { 420 ordering = REQUIRE_ORDER; 421 ++optstring; 422 } 423 else if (posixly_correct != NULL) 424 ordering = REQUIRE_ORDER; 425 else 426 ordering = PERMUTE; 427 428#if defined _LIBC && defined USE_NONOPTION_FLAGS 429 if (posixly_correct == NULL 430 && argc == original_argc && argv == original_argv) 431 { 432 if (nonoption_flags_max_len == 0) 433 { 434 if (__getopt_nonoption_flags == NULL 435 || __getopt_nonoption_flags[0] == '\0') 436 nonoption_flags_max_len = -1; 437 else 438 { 439 const char *orig_str = __getopt_nonoption_flags; 440 int len = nonoption_flags_max_len = strlen (orig_str); 441 if (nonoption_flags_max_len < argc) 442 nonoption_flags_max_len = argc; 443 __getopt_nonoption_flags = 444 (char *) malloc (nonoption_flags_max_len); 445 if (__getopt_nonoption_flags == NULL) 446 nonoption_flags_max_len = -1; 447 else 448 memset (__mempcpy (__getopt_nonoption_flags, orig_str, len), 449 '\0', nonoption_flags_max_len - len); 450 } 451 } 452 nonoption_flags_len = nonoption_flags_max_len; 453 } 454 else 455 nonoption_flags_len = 0; 456#endif 457 458 return optstring; 459} 460 461/* Scan elements of ARGV (whose length is ARGC) for option characters 462 given in OPTSTRING. 463 464 If an element of ARGV starts with '-', and is not exactly "-" or "--", 465 then it is an option element. The characters of this element 466 (aside from the initial '-') are option characters. If `getopt' 467 is called repeatedly, it returns successively each of the option characters 468 from each of the option elements. 469 470 If `getopt' finds another option character, it returns that character, 471 updating `optind' and `nextchar' so that the next call to `getopt' can 472 resume the scan with the following option character or ARGV-element. 473 474 If there are no more option characters, `getopt' returns -1. 475 Then `optind' is the index in ARGV of the first ARGV-element 476 that is not an option. (The ARGV-elements have been permuted 477 so that those that are not options now come last.) 478 479 OPTSTRING is a string containing the legitimate option characters. 480 If an option character is seen that is not listed in OPTSTRING, 481 return '?' after printing an error message. If you set `opterr' to 482 zero, the error message is suppressed but we still return '?'. 483 484 If a char in OPTSTRING is followed by a colon, that means it wants an arg, 485 so the following text in the same ARGV-element, or the text of the following 486 ARGV-element, is returned in `optarg'. Two colons mean an option that 487 wants an optional arg; if there is text in the current ARGV-element, 488 it is returned in `optarg', otherwise `optarg' is set to zero. 489 490 If OPTSTRING starts with `-' or `+', it requests different methods of 491 handling the non-option ARGV-elements. 492 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above. 493 494 Long-named options begin with `--' instead of `-'. 495 Their names may be abbreviated as long as the abbreviation is unique 496 or is an exact match for some defined option. If they have an 497 argument, it follows the option name in the same ARGV-element, separated 498 from the option name by a `=', or else the in next ARGV-element. 499 When `getopt' finds a long-named option, it returns 0 if that option's 500 `flag' field is nonzero, the value of the option's `val' field 501 if the `flag' field is zero. 502 503 The elements of ARGV aren't really const, because we permute them. 504 But we pretend they're const in the prototype to be compatible 505 with other systems. 506 507 LONGOPTS is a vector of `struct option' terminated by an 508 element containing a name which is zero. 509 510 LONGIND returns the index in LONGOPT of the long-named option found. 511 It is only valid when a long-named option has been found by the most 512 recent call. 513 514 If LONG_ONLY is nonzero, '-' as well as '--' can introduce 515 long-named options. */ 516 517int 518_getopt_internal (argc, argv, optstring, longopts, longind, long_only) 519 int argc; 520 char *const *argv; 521 const char *optstring; 522 const struct option *longopts; 523 int *longind; 524 int long_only; 525{ 526 int print_errors = opterr; 527 if (optstring[0] == ':') 528 print_errors = 0; 529 530 if (argc < 1) 531 return -1; 532 533 optarg = NULL; 534 535 if (optind == 0 || !__getopt_initialized) 536 { 537 if (optind == 0) 538 optind = 1; /* Don't scan ARGV[0], the program name. */ 539 optstring = _getopt_initialize (argc, argv, optstring); 540 __getopt_initialized = 1; 541 } 542 543 /* Test whether ARGV[optind] points to a non-option argument. 544 Either it does not have option syntax, or there is an environment flag 545 from the shell indicating it is not an option. The later information 546 is only used when the used in the GNU libc. */ 547#if defined _LIBC && defined USE_NONOPTION_FLAGS 548# define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \ 549 || (optind < nonoption_flags_len \ 550 && __getopt_nonoption_flags[optind] == '1')) 551#else 552# define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0') 553#endif 554 555 if (nextchar == NULL || *nextchar == '\0') 556 { 557 /* Advance to the next ARGV-element. */ 558 559 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been 560 moved back by the user (who may also have changed the arguments). */ 561 if (last_nonopt > optind) 562 last_nonopt = optind; 563 if (first_nonopt > optind) 564 first_nonopt = optind; 565 566 if (ordering == PERMUTE) 567 { 568 /* If we have just processed some options following some non-options, 569 exchange them so that the options come first. */ 570 571 if (first_nonopt != last_nonopt && last_nonopt != optind) 572 exchange ((char **) argv); 573 else if (last_nonopt != optind) 574 first_nonopt = optind; 575 576 /* Skip any additional non-options 577 and extend the range of non-options previously skipped. */ 578 579 while (optind < argc && NONOPTION_P) 580 optind++; 581 last_nonopt = optind; 582 } 583 584 /* The special ARGV-element `--' means premature end of options. 585 Skip it like a null option, 586 then exchange with previous non-options as if it were an option, 587 then skip everything else like a non-option. */ 588 589 if (optind != argc && !strcmp (argv[optind], "--")) 590 { 591 optind++; 592 593 if (first_nonopt != last_nonopt && last_nonopt != optind) 594 exchange ((char **) argv); 595 else if (first_nonopt == last_nonopt) 596 first_nonopt = optind; 597 last_nonopt = argc; 598 599 optind = argc; 600 } 601 602 /* If we have done all the ARGV-elements, stop the scan 603 and back over any non-options that we skipped and permuted. */ 604 605 if (optind == argc) 606 { 607 /* Set the next-arg-index to point at the non-options 608 that we previously skipped, so the caller will digest them. */ 609 if (first_nonopt != last_nonopt) 610 optind = first_nonopt; 611 return -1; 612 } 613 614 /* If we have come to a non-option and did not permute it, 615 either stop the scan or describe it to the caller and pass it by. */ 616 617 if (NONOPTION_P) 618 { 619 if (ordering == REQUIRE_ORDER) 620 return -1; 621 optarg = argv[optind++]; 622 return 1; 623 } 624 625 /* We have found another option-ARGV-element. 626 Skip the initial punctuation. */ 627 628 nextchar = (argv[optind] + 1 629 + (longopts != NULL && argv[optind][1] == '-')); 630 } 631 632 /* Decode the current option-ARGV-element. */ 633 634 /* Check whether the ARGV-element is a long option. 635 636 If long_only and the ARGV-element has the form "-f", where f is 637 a valid short option, don't consider it an abbreviated form of 638 a long option that starts with f. Otherwise there would be no 639 way to give the -f short option. 640 641 On the other hand, if there's a long option "fubar" and 642 the ARGV-element is "-fu", do consider that an abbreviation of 643 the long option, just like "--fu", and not "-f" with arg "u". 644 645 This distinction seems to be the most useful approach. */ 646 647 if (longopts != NULL 648 && (argv[optind][1] == '-' 649 || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1]))))) 650 { 651 char *nameend; 652 const struct option *p; 653 const struct option *pfound = NULL; 654 int exact = 0; 655 int ambig = 0; 656 int indfound = -1; 657 int option_index; 658 659 for (nameend = nextchar; *nameend && *nameend != '='; nameend++) 660 /* Do nothing. */ ; 661 662 /* Test all long options for either exact match 663 or abbreviated matches. */ 664 for (p = longopts, option_index = 0; p->name; p++, option_index++) 665 if (!strncmp (p->name, nextchar, nameend - nextchar)) 666 { 667 if ((unsigned int) (nameend - nextchar) 668 == (unsigned int) strlen (p->name)) 669 { 670 /* Exact match found. */ 671 pfound = p; 672 indfound = option_index; 673 exact = 1; 674 break; 675 } 676 else if (pfound == NULL) 677 { 678 /* First nonexact match found. */ 679 pfound = p; 680 indfound = option_index; 681 } 682 else if (long_only 683 || pfound->has_arg != p->has_arg 684 || pfound->flag != p->flag 685 || pfound->val != p->val) 686 /* Second or later nonexact match found. */ 687 ambig = 1; 688 } 689 690 if (ambig && !exact) 691 { 692 if (print_errors) 693 fprintf (stderr, _("%s: option `%s' is ambiguous\n"), 694 argv[0], argv[optind]); 695 nextchar += strlen (nextchar); 696 optind++; 697 optopt = 0; 698 return '?'; 699 } 700 701 if (pfound != NULL) 702 { 703 option_index = indfound; 704 optind++; 705 if (*nameend) 706 { 707 /* Don't test has_arg with >, because some C compilers don't 708 allow it to be used on enums. */ 709 if (pfound->has_arg) 710 optarg = nameend + 1; 711 else 712 { 713 if (print_errors) 714 { 715 if (argv[optind - 1][1] == '-') 716 /* --option */ 717 fprintf (stderr, 718 _("%s: option `--%s' doesn't allow an argument\n"), 719 argv[0], pfound->name); 720 else 721 /* +option or -option */ 722 fprintf (stderr, 723 _("%s: option `%c%s' doesn't allow an argument\n"), 724 argv[0], argv[optind - 1][0], pfound->name); 725 } 726 727 nextchar += strlen (nextchar); 728 729 optopt = pfound->val; 730 return '?'; 731 } 732 } 733 else if (pfound->has_arg == 1) 734 { 735 if (optind < argc) 736 optarg = argv[optind++]; 737 else 738 { 739 if (print_errors) 740 fprintf (stderr, 741 _("%s: option `%s' requires an argument\n"), 742 argv[0], argv[optind - 1]); 743 nextchar += strlen (nextchar); 744 optopt = pfound->val; 745 return optstring[0] == ':' ? ':' : '?'; 746 } 747 } 748 nextchar += strlen (nextchar); 749 if (longind != NULL) 750 *longind = option_index; 751 if (pfound->flag) 752 { 753 *(pfound->flag) = pfound->val; 754 return 0; 755 } 756 return pfound->val; 757 } 758 759 /* Can't find it as a long option. If this is not getopt_long_only, 760 or the option starts with '--' or is not a valid short 761 option, then it's an error. 762 Otherwise interpret it as a short option. */ 763 if (!long_only || argv[optind][1] == '-' 764 || my_index (optstring, *nextchar) == NULL) 765 { 766 if (print_errors) 767 { 768 if (argv[optind][1] == '-') 769 /* --option */ 770 fprintf (stderr, _("%s: unrecognized option `--%s'\n"), 771 argv[0], nextchar); 772 else 773 /* +option or -option */ 774 fprintf (stderr, _("%s: unrecognized option `%c%s'\n"), 775 argv[0], argv[optind][0], nextchar); 776 } 777 nextchar = (char *) ""; 778 optind++; 779 optopt = 0; 780 return '?'; 781 } 782 } 783 784 /* Look at and handle the next short option-character. */ 785 786 { 787 char c = *nextchar++; 788 char *temp = my_index (optstring, c); 789 790 /* Increment `optind' when we start to process its last character. */ 791 if (*nextchar == '\0') 792 ++optind; 793 794 if (temp == NULL || c == ':') 795 { 796 if (print_errors) 797 { 798 if (posixly_correct) 799 /* 1003.2 specifies the format of this message. */ 800 fprintf (stderr, _("%s: illegal option -- %c\n"), 801 argv[0], c); 802 else 803 fprintf (stderr, _("%s: invalid option -- %c\n"), 804 argv[0], c); 805 } 806 optopt = c; 807 return '?'; 808 } 809 /* Convenience. Treat POSIX -W foo same as long option --foo */ 810 if (temp[0] == 'W' && temp[1] == ';') 811 { 812 char *nameend; 813 const struct option *p; 814 const struct option *pfound = NULL; 815 int exact = 0; 816 int ambig = 0; 817 int indfound = 0; 818 int option_index; 819 820 /* This is an option that requires an argument. */ 821 if (*nextchar != '\0') 822 { 823 optarg = nextchar; 824 /* If we end this ARGV-element by taking the rest as an arg, 825 we must advance to the next element now. */ 826 optind++; 827 } 828 else if (optind == argc) 829 { 830 if (print_errors) 831 { 832 /* 1003.2 specifies the format of this message. */ 833 fprintf (stderr, _("%s: option requires an argument -- %c\n"), 834 argv[0], c); 835 } 836 optopt = c; 837 if (optstring[0] == ':') 838 c = ':'; 839 else 840 c = '?'; 841 return c; 842 } 843 else 844 /* We already incremented `optind' once; 845 increment it again when taking next ARGV-elt as argument. */ 846 optarg = argv[optind++]; 847 848 /* optarg is now the argument, see if it's in the 849 table of longopts. */ 850 851 for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++) 852 /* Do nothing. */ ; 853 854 /* Test all long options for either exact match 855 or abbreviated matches. */ 856 for (p = longopts, option_index = 0; p->name; p++, option_index++) 857 if (!strncmp (p->name, nextchar, nameend - nextchar)) 858 { 859 if ((unsigned int) (nameend - nextchar) == strlen (p->name)) 860 { 861 /* Exact match found. */ 862 pfound = p; 863 indfound = option_index; 864 exact = 1; 865 break; 866 } 867 else if (pfound == NULL) 868 { 869 /* First nonexact match found. */ 870 pfound = p; 871 indfound = option_index; 872 } 873 else 874 /* Second or later nonexact match found. */ 875 ambig = 1; 876 } 877 if (ambig && !exact) 878 { 879 if (print_errors) 880 fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"), 881 argv[0], argv[optind]); 882 nextchar += strlen (nextchar); 883 optind++; 884 return '?'; 885 } 886 if (pfound != NULL) 887 { 888 option_index = indfound; 889 if (*nameend) 890 { 891 /* Don't test has_arg with >, because some C compilers don't 892 allow it to be used on enums. */ 893 if (pfound->has_arg) 894 optarg = nameend + 1; 895 else 896 { 897 if (print_errors) 898 fprintf (stderr, _("\ 899%s: option `-W %s' doesn't allow an argument\n"), 900 argv[0], pfound->name); 901 902 nextchar += strlen (nextchar); 903 return '?'; 904 } 905 } 906 else if (pfound->has_arg == 1) 907 { 908 if (optind < argc) 909 optarg = argv[optind++]; 910 else 911 { 912 if (print_errors) 913 fprintf (stderr, 914 _("%s: option `%s' requires an argument\n"), 915 argv[0], argv[optind - 1]); 916 nextchar += strlen (nextchar); 917 return optstring[0] == ':' ? ':' : '?'; 918 } 919 } 920 nextchar += strlen (nextchar); 921 if (longind != NULL) 922 *longind = option_index; 923 if (pfound->flag) 924 { 925 *(pfound->flag) = pfound->val; 926 return 0; 927 } 928 return pfound->val; 929 } 930 nextchar = NULL; 931 return 'W'; /* Let the application handle it. */ 932 } 933 if (temp[1] == ':') 934 { 935 if (temp[2] == ':') 936 { 937 /* This is an option that accepts an argument optionally. */ 938 if (*nextchar != '\0') 939 { 940 optarg = nextchar; 941 optind++; 942 } 943 else 944 optarg = NULL; 945 nextchar = NULL; 946 } 947 else 948 { 949 /* This is an option that requires an argument. */ 950 if (*nextchar != '\0') 951 { 952 optarg = nextchar; 953 /* If we end this ARGV-element by taking the rest as an arg, 954 we must advance to the next element now. */ 955 optind++; 956 } 957 else if (optind == argc) 958 { 959 if (print_errors) 960 { 961 /* 1003.2 specifies the format of this message. */ 962 fprintf (stderr, 963 _("%s: option requires an argument -- %c\n"), 964 argv[0], c); 965 } 966 optopt = c; 967 if (optstring[0] == ':') 968 c = ':'; 969 else 970 c = '?'; 971 } 972 else 973 /* We already incremented `optind' once; 974 increment it again when taking next ARGV-elt as argument. */ 975 optarg = argv[optind++]; 976 nextchar = NULL; 977 } 978 } 979 return c; 980 } 981} 982 983int 984getopt (argc, argv, optstring) 985 int argc; 986 char *const *argv; 987 const char *optstring; 988{ 989 return _getopt_internal (argc, argv, optstring, 990 (const struct option *) 0, 991 (int *) 0, 992 0); 993} 994 995#endif /* Not ELIDE_CODE. */ 996 997#ifdef TEST 998 999/* Compile with -DTEST to make an executable for use in testing 1000 the above definition of `getopt'. */ 1001 1002int 1003main (argc, argv) 1004 int argc; 1005 char **argv; 1006{ 1007 int c; 1008 int digit_optind = 0; 1009 1010 while (1) 1011 { 1012 int this_option_optind = optind ? optind : 1; 1013 1014 c = getopt (argc, argv, "abc:d:0123456789"); 1015 if (c == -1) 1016 break; 1017 1018 switch (c) 1019 { 1020 case '0': 1021 case '1': 1022 case '2': 1023 case '3': 1024 case '4': 1025 case '5': 1026 case '6': 1027 case '7': 1028 case '8': 1029 case '9': 1030 if (digit_optind != 0 && digit_optind != this_option_optind) 1031 printf ("digits occur in two different argv-elements.\n"); 1032 digit_optind = this_option_optind; 1033 printf ("option %c\n", c); 1034 break; 1035 1036 case 'a': 1037 printf ("option a\n"); 1038 break; 1039 1040 case 'b': 1041 printf ("option b\n"); 1042 break; 1043 1044 case 'c': 1045 printf ("option c with value `%s'\n", optarg); 1046 break; 1047 1048 case '?': 1049 break; 1050 1051 default: 1052 printf ("?? getopt returned character code 0%o ??\n", c); 1053 } 1054 } 1055 1056 if (optind < argc) 1057 { 1058 printf ("non-option ARGV-elements: "); 1059 while (optind < argc) 1060 printf ("%s ", argv[optind++]); 1061 printf ("\n"); 1062 } 1063 1064 exit (0); 1065} 1066 1067#endif /* TEST */ 1068