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 7 Free Software Foundation, Inc. 8 9 NOTE: The canonical source of this file is maintained with the GNU C Library. 10 Bugs can be reported to bug-glibc@gnu.org. 11 12 This program is free software; you can redistribute it and/or modify it 13 under the terms of the GNU General Public License as published by the 14 Free Software Foundation; either version 2, or (at your option) any 15 later version. 16 17 This program is distributed in the hope that it will be useful, 18 but WITHOUT ANY WARRANTY; without even the implied warranty of 19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 GNU General Public License for more details. 21 22 You should have received a copy of the GNU General Public License 23 along with this program; if not, write to the Free Software 24 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 25 USA. */ 26 27/* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>. 28 Ditto for AIX 3.2 and <stdlib.h>. */ 29#ifndef _NO_PROTO 30# define _NO_PROTO 31#endif 32 33#ifdef HAVE_CONFIG_H 34# include <config.h> 35#endif 36 37#if !defined __STDC__ || !__STDC__ 38/* This is a separate conditional since some stdc systems 39 reject `defined (const)'. */ 40# ifndef const 41# define const 42# endif 43#endif 44 45#include <stdio.h> 46 47/* Comment out all this code if we are using the GNU C Library, and are not 48 actually compiling the library itself. This code is part of the GNU C 49 Library, but also included in many other GNU distributions. Compiling 50 and linking in this code is a waste when using the GNU C library 51 (especially if it is a shared library). Rather than having every GNU 52 program understand `configure --with-gnu-libc' and omit the object files, 53 it is simpler to just do this in the source for each such file. */ 54 55#define GETOPT_INTERFACE_VERSION 2 56#if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2 57# include <gnu-versions.h> 58# if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION 59# define ELIDE_CODE 60# endif 61#endif 62 63#ifndef ELIDE_CODE 64 65 66/* This needs to come after some library #include 67 to get __GNU_LIBRARY__ defined. */ 68#ifdef __GNU_LIBRARY__ 69/* Don't include stdlib.h for non-GNU C libraries because some of them 70 contain conflicting prototypes for getopt. */ 71# include <stdlib.h> 72# include <unistd.h> 73#endif /* GNU C library. */ 74 75#ifdef VMS 76# include <unixlib.h> 77# if HAVE_STRING_H - 0 78# include <string.h> 79# endif 80#endif 81 82#ifndef _ 83/* This is for other GNU distributions with internationalized messages. 84 When compiling libc, the _ macro is predefined. */ 85# ifdef HAVE_LIBINTL_H 86# include <libintl.h> 87# define _(msgid) gettext (msgid) 88# else 89# define _(msgid) (msgid) 90# endif 91#endif 92 93/* This version of `getopt' appears to the caller like standard Unix `getopt' 94 but it behaves differently for the user, since it allows the user 95 to intersperse the options with the other arguments. 96 97 As `getopt' works, it permutes the elements of ARGV so that, 98 when it is done, all the options precede everything else. Thus 99 all application programs are extended to handle flexible argument order. 100 101 Setting the environment variable POSIXLY_CORRECT disables permutation. 102 Then the behavior is completely standard. 103 104 GNU application programs can use a third alternative mode in which 105 they can distinguish the relative order of options and other arguments. */ 106 107#include "getopt.h" 108 109/* For communication from `getopt' to the caller. 110 When `getopt' finds an option that takes an argument, 111 the argument value is returned here. 112 Also, when `ordering' is RETURN_IN_ORDER, 113 each non-option ARGV-element is returned here. */ 114 115char *optarg = NULL; 116 117/* Index in ARGV of the next element to be scanned. 118 This is used for communication to and from the caller 119 and for communication between successive calls to `getopt'. 120 121 On entry to `getopt', zero means this is the first call; initialize. 122 123 When `getopt' returns -1, this is the index of the first of the 124 non-option elements that the caller should itself scan. 125 126 Otherwise, `optind' communicates from one call to the next 127 how much of ARGV has been scanned so far. */ 128 129/* 1003.2 says this must be 1 before any call. */ 130int optind = 1; 131 132/* Formerly, initialization of getopt depended on optind==0, which 133 causes problems with re-calling getopt as programs generally don't 134 know that. */ 135 136int __getopt_initialized = 0; 137 138/* The next char to be scanned in the option-element 139 in which the last option character we returned was found. 140 This allows us to pick up the scan where we left off. 141 142 If this is zero, or a null string, it means resume the scan 143 by advancing to the next ARGV-element. */ 144 145static char *nextchar; 146 147/* Callers store zero here to inhibit the error message 148 for unrecognized options. */ 149 150int opterr = 1; 151 152/* Set to an option character which was unrecognized. 153 This must be initialized on some systems to avoid linking in the 154 system's own getopt implementation. */ 155 156int optopt = '?'; 157 158/* Describe how to deal with options that follow non-option ARGV-elements. 159 160 If the caller did not specify anything, 161 the default is REQUIRE_ORDER if the environment variable 162 POSIXLY_CORRECT is defined, PERMUTE otherwise. 163 164 REQUIRE_ORDER means don't recognize them as options; 165 stop option processing when the first non-option is seen. 166 This is what Unix does. 167 This mode of operation is selected by either setting the environment 168 variable POSIXLY_CORRECT, or using `+' as the first character 169 of the list of option characters. 170 171 PERMUTE is the default. We permute the contents of ARGV as we scan, 172 so that eventually all the non-options are at the end. This allows options 173 to be given in any order, even with programs that were not written to 174 expect this. 175 176 RETURN_IN_ORDER is an option available to programs that were written 177 to expect options and other ARGV-elements in any order and that care about 178 the ordering of the two. We describe each non-option ARGV-element 179 as if it were the argument of an option with character code 1. 180 Using `-' as the first character of the list of option characters 181 selects this mode of operation. 182 183 The special argument `--' forces an end of option-scanning regardless 184 of the value of `ordering'. In the case of RETURN_IN_ORDER, only 185 `--' can cause `getopt' to return -1 with `optind' != ARGC. */ 186 187static enum 188{ 189 REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER 190} ordering; 191 192/* Value of POSIXLY_CORRECT environment variable. */ 193static char *posixly_correct; 194 195#ifdef __GNU_LIBRARY__ 196/* We want to avoid inclusion of string.h with non-GNU libraries 197 because there are many ways it can cause trouble. 198 On some systems, it contains special magic macros that don't work 199 in GCC. */ 200# include <string.h> 201# define my_index strchr 202#else 203 204# if HAVE_STRING_H 205# include <string.h> 206# else 207# include <strings.h> 208# endif 209 210/* Avoid depending on library functions or files 211 whose names are inconsistent. */ 212 213#ifndef getenv 214extern char *getenv (); 215#endif 216 217static char * 218my_index (str, chr) 219 const char *str; 220 int chr; 221{ 222 while (*str) 223 { 224 if (*str == chr) 225 return (char *) str; 226 str++; 227 } 228 return 0; 229} 230 231/* If using GCC, we can safely declare strlen this way. 232 If not using GCC, it is ok not to declare it. */ 233#ifdef __GNUC__ 234/* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h. 235 That was relevant to code that was here before. */ 236# if (!defined __STDC__ || !__STDC__) && !defined strlen 237/* gcc with -traditional declares the built-in strlen to return int, 238 and has done so at least since version 2.4.5. -- rms. */ 239extern int strlen (const char *); 240# endif /* not __STDC__ */ 241#endif /* __GNUC__ */ 242 243#endif /* not __GNU_LIBRARY__ */ 244 245/* Handle permutation of arguments. */ 246 247/* Describe the part of ARGV that contains non-options that have 248 been skipped. `first_nonopt' is the index in ARGV of the first of them; 249 `last_nonopt' is the index after the last of them. */ 250 251static int first_nonopt; 252static int last_nonopt; 253 254#ifdef _LIBC 255/* Bash 2.0 gives us an environment variable containing flags 256 indicating ARGV elements that should not be considered arguments. */ 257 258/* Defined in getopt_init.c */ 259extern char *__getopt_nonoption_flags; 260 261static int nonoption_flags_max_len; 262static int nonoption_flags_len; 263 264static int original_argc; 265static char *const *original_argv; 266 267/* Make sure the environment variable bash 2.0 puts in the environment 268 is valid for the getopt call we must make sure that the ARGV passed 269 to getopt is that one passed to the process. */ 270static void 271__attribute__ ((unused)) 272store_args_and_env (int argc, char *const *argv) 273{ 274 /* XXX This is no good solution. We should rather copy the args so 275 that we can compare them later. But we must not use malloc(3). */ 276 original_argc = argc; 277 original_argv = argv; 278} 279# ifdef text_set_element 280text_set_element (__libc_subinit, store_args_and_env); 281# endif /* text_set_element */ 282 283# 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 /* !_LIBC */ 291# define SWAP_FLAGS(ch1, ch2) 292#endif /* _LIBC */ 293 294/* Exchange two adjacent subsequences of ARGV. 295 One subsequence is elements [first_nonopt,last_nonopt) 296 which contains all the non-options that have been skipped so far. 297 The other is elements [last_nonopt,optind), which contains all 298 the options processed since those non-options were skipped. 299 300 `first_nonopt' and `last_nonopt' are relocated so that they describe 301 the new indices of the non-options in ARGV after they are moved. */ 302 303#if defined __STDC__ && __STDC__ 304static void exchange (char **); 305#endif 306 307static void 308exchange (argv) 309 char **argv; 310{ 311 int bottom = first_nonopt; 312 int middle = last_nonopt; 313 int top = optind; 314 char *tem; 315 316 /* Exchange the shorter segment with the far end of the longer segment. 317 That puts the shorter segment into the right place. 318 It leaves the longer segment in the right place overall, 319 but it consists of two parts that need to be swapped next. */ 320 321#ifdef _LIBC 322 /* First make sure the handling of the `__getopt_nonoption_flags' 323 string can work normally. Our top argument must be in the range 324 of the string. */ 325 if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len) 326 { 327 /* We must extend the array. The user plays games with us and 328 presents new arguments. */ 329 char *new_str = malloc (top + 1); 330 if (new_str == NULL) 331 nonoption_flags_len = nonoption_flags_max_len = 0; 332 else 333 { 334 memset (__mempcpy (new_str, __getopt_nonoption_flags, 335 nonoption_flags_max_len), 336 '\0', top + 1 - nonoption_flags_max_len); 337 nonoption_flags_max_len = top + 1; 338 __getopt_nonoption_flags = new_str; 339 } 340 } 341#endif 342 343 while (top > middle && middle > bottom) 344 { 345 if (top - middle > middle - bottom) 346 { 347 /* Bottom segment is the short one. */ 348 int len = middle - bottom; 349 register int i; 350 351 /* Swap it with the top part of the top segment. */ 352 for (i = 0; i < len; i++) 353 { 354 tem = argv[bottom + i]; 355 argv[bottom + i] = argv[top - (middle - bottom) + i]; 356 argv[top - (middle - bottom) + i] = tem; 357 SWAP_FLAGS (bottom + i, top - (middle - bottom) + i); 358 } 359 /* Exclude the moved bottom segment from further swapping. */ 360 top -= len; 361 } 362 else 363 { 364 /* Top segment is the short one. */ 365 int len = top - middle; 366 register int i; 367 368 /* Swap it with the bottom part of the bottom segment. */ 369 for (i = 0; i < len; i++) 370 { 371 tem = argv[bottom + i]; 372 argv[bottom + i] = argv[middle + i]; 373 argv[middle + i] = tem; 374 SWAP_FLAGS (bottom + i, middle + i); 375 } 376 /* Exclude the moved top segment from further swapping. */ 377 bottom += len; 378 } 379 } 380 381 /* Update records for the slots the non-options now occupy. */ 382 383 first_nonopt += (optind - last_nonopt); 384 last_nonopt = optind; 385} 386 387/* Initialize the internal data when the first call is made. */ 388 389#if defined __STDC__ && __STDC__ 390static const char *_getopt_initialize (int, char *const *, const char *); 391#endif 392static const char * 393_getopt_initialize (argc, argv, optstring) 394 int argc; 395 char *const *argv; 396 const char *optstring; 397{ 398 /* Start processing options with ARGV-element 1 (since ARGV-element 0 399 is the program name); the sequence of previously skipped 400 non-option ARGV-elements is empty. */ 401 402 first_nonopt = last_nonopt = optind; 403 404 nextchar = NULL; 405 406 posixly_correct = getenv ("POSIXLY_CORRECT"); 407 408 /* Determine how to handle the ordering of options and nonoptions. */ 409 410 if (optstring[0] == '-') 411 { 412 ordering = RETURN_IN_ORDER; 413 ++optstring; 414 } 415 else if (optstring[0] == '+') 416 { 417 ordering = REQUIRE_ORDER; 418 ++optstring; 419 } 420 else if (posixly_correct != NULL) 421 ordering = REQUIRE_ORDER; 422 else 423 ordering = PERMUTE; 424 425#ifdef _LIBC 426 if (posixly_correct == NULL 427 && argc == original_argc && argv == original_argv) 428 { 429 if (nonoption_flags_max_len == 0) 430 { 431 if (__getopt_nonoption_flags == NULL 432 || __getopt_nonoption_flags[0] == '\0') 433 nonoption_flags_max_len = -1; 434 else 435 { 436 const char *orig_str = __getopt_nonoption_flags; 437 int len = nonoption_flags_max_len = strlen (orig_str); 438 if (nonoption_flags_max_len < argc) 439 nonoption_flags_max_len = argc; 440 __getopt_nonoption_flags = 441 (char *) malloc (nonoption_flags_max_len); 442 if (__getopt_nonoption_flags == NULL) 443 nonoption_flags_max_len = -1; 444 else 445 memset (__mempcpy (__getopt_nonoption_flags, orig_str, len), 446 '\0', nonoption_flags_max_len - len); 447 } 448 } 449 nonoption_flags_len = nonoption_flags_max_len; 450 } 451 else 452 nonoption_flags_len = 0; 453#endif 454 455 return optstring; 456} 457 458/* Scan elements of ARGV (whose length is ARGC) for option characters 459 given in OPTSTRING. 460 461 If an element of ARGV starts with '-', and is not exactly "-" or "--", 462 then it is an option element. The characters of this element 463 (aside from the initial '-') are option characters. If `getopt' 464 is called repeatedly, it returns successively each of the option characters 465 from each of the option elements. 466 467 If `getopt' finds another option character, it returns that character, 468 updating `optind' and `nextchar' so that the next call to `getopt' can 469 resume the scan with the following option character or ARGV-element. 470 471 If there are no more option characters, `getopt' returns -1. 472 Then `optind' is the index in ARGV of the first ARGV-element 473 that is not an option. (The ARGV-elements have been permuted 474 so that those that are not options now come last.) 475 476 OPTSTRING is a string containing the legitimate option characters. 477 If an option character is seen that is not listed in OPTSTRING, 478 return '?' after printing an error message. If you set `opterr' to 479 zero, the error message is suppressed but we still return '?'. 480 481 If a char in OPTSTRING is followed by a colon, that means it wants an arg, 482 so the following text in the same ARGV-element, or the text of the following 483 ARGV-element, is returned in `optarg'. Two colons mean an option that 484 wants an optional arg; if there is text in the current ARGV-element, 485 it is returned in `optarg', otherwise `optarg' is set to zero. 486 487 If OPTSTRING starts with `-' or `+', it requests different methods of 488 handling the non-option ARGV-elements. 489 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above. 490 491 Long-named options begin with `--' instead of `-'. 492 Their names may be abbreviated as long as the abbreviation is unique 493 or is an exact match for some defined option. If they have an 494 argument, it follows the option name in the same ARGV-element, separated 495 from the option name by a `=', or else the in next ARGV-element. 496 When `getopt' finds a long-named option, it returns 0 if that option's 497 `flag' field is nonzero, the value of the option's `val' field 498 if the `flag' field is zero. 499 500 The elements of ARGV aren't really const, because we permute them. 501 But we pretend they're const in the prototype to be compatible 502 with other systems. 503 504 LONGOPTS is a vector of `struct option' terminated by an 505 element containing a name which is zero. 506 507 LONGIND returns the index in LONGOPT of the long-named option found. 508 It is only valid when a long-named option has been found by the most 509 recent call. 510 511 If LONG_ONLY is nonzero, '-' as well as '--' can introduce 512 long-named options. */ 513 514int 515_getopt_internal (argc, argv, optstring, longopts, longind, long_only) 516 int argc; 517 char *const *argv; 518 const char *optstring; 519 const struct option *longopts; 520 int *longind; 521 int long_only; 522{ 523 optarg = NULL; 524 525 if (optind == 0 || !__getopt_initialized) 526 { 527 if (optind == 0) 528 optind = 1; /* Don't scan ARGV[0], the program name. */ 529 optstring = _getopt_initialize (argc, argv, optstring); 530 __getopt_initialized = 1; 531 } 532 533 /* Test whether ARGV[optind] points to a non-option argument. 534 Either it does not have option syntax, or there is an environment flag 535 from the shell indicating it is not an option. The later information 536 is only used when the used in the GNU libc. */ 537#ifdef _LIBC 538# define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \ 539 || (optind < nonoption_flags_len \ 540 && __getopt_nonoption_flags[optind] == '1')) 541#else 542# define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0') 543#endif 544 545 if (nextchar == NULL || *nextchar == '\0') 546 { 547 /* Advance to the next ARGV-element. */ 548 549 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been 550 moved back by the user (who may also have changed the arguments). */ 551 if (last_nonopt > optind) 552 last_nonopt = optind; 553 if (first_nonopt > optind) 554 first_nonopt = optind; 555 556 if (ordering == PERMUTE) 557 { 558 /* If we have just processed some options following some non-options, 559 exchange them so that the options come first. */ 560 561 if (first_nonopt != last_nonopt && last_nonopt != optind) 562 exchange ((char **) argv); 563 else if (last_nonopt != optind) 564 first_nonopt = optind; 565 566 /* Skip any additional non-options 567 and extend the range of non-options previously skipped. */ 568 569 while (optind < argc && NONOPTION_P) 570 optind++; 571 last_nonopt = optind; 572 } 573 574 /* The special ARGV-element `--' means premature end of options. 575 Skip it like a null option, 576 then exchange with previous non-options as if it were an option, 577 then skip everything else like a non-option. */ 578 579 if (optind != argc && !strcmp (argv[optind], "--")) 580 { 581 optind++; 582 583 if (first_nonopt != last_nonopt && last_nonopt != optind) 584 exchange ((char **) argv); 585 else if (first_nonopt == last_nonopt) 586 first_nonopt = optind; 587 last_nonopt = argc; 588 589 optind = argc; 590 } 591 592 /* If we have done all the ARGV-elements, stop the scan 593 and back over any non-options that we skipped and permuted. */ 594 595 if (optind == argc) 596 { 597 /* Set the next-arg-index to point at the non-options 598 that we previously skipped, so the caller will digest them. */ 599 if (first_nonopt != last_nonopt) 600 optind = first_nonopt; 601 return -1; 602 } 603 604 /* If we have come to a non-option and did not permute it, 605 either stop the scan or describe it to the caller and pass it by. */ 606 607 if (NONOPTION_P) 608 { 609 if (ordering == REQUIRE_ORDER) 610 return -1; 611 optarg = argv[optind++]; 612 return 1; 613 } 614 615 /* We have found another option-ARGV-element. 616 Skip the initial punctuation. */ 617 618 nextchar = (argv[optind] + 1 619 + (longopts != NULL && argv[optind][1] == '-')); 620 } 621 622 /* Decode the current option-ARGV-element. */ 623 624 /* Check whether the ARGV-element is a long option. 625 626 If long_only and the ARGV-element has the form "-f", where f is 627 a valid short option, don't consider it an abbreviated form of 628 a long option that starts with f. Otherwise there would be no 629 way to give the -f short option. 630 631 On the other hand, if there's a long option "fubar" and 632 the ARGV-element is "-fu", do consider that an abbreviation of 633 the long option, just like "--fu", and not "-f" with arg "u". 634 635 This distinction seems to be the most useful approach. */ 636 637 if (longopts != NULL 638 && (argv[optind][1] == '-' 639 || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1]))))) 640 { 641 char *nameend; 642 const struct option *p; 643 const struct option *pfound = NULL; 644 int exact = 0; 645 int ambig = 0; 646 int indfound = -1; 647 int option_index; 648 649 for (nameend = nextchar; *nameend && *nameend != '='; nameend++) 650 /* Do nothing. */ ; 651 652 /* Test all long options for either exact match 653 or abbreviated matches. */ 654 for (p = longopts, option_index = 0; p->name; p++, option_index++) 655 if (!strncmp (p->name, nextchar, nameend - nextchar)) 656 { 657 if ((unsigned int) (nameend - nextchar) 658 == (unsigned int) strlen (p->name)) 659 { 660 /* Exact match found. */ 661 pfound = p; 662 indfound = option_index; 663 exact = 1; 664 break; 665 } 666 else if (pfound == NULL) 667 { 668 /* First nonexact match found. */ 669 pfound = p; 670 indfound = option_index; 671 } 672 else 673 /* Second or later nonexact match found. */ 674 ambig = 1; 675 } 676 677 if (ambig && !exact) 678 { 679 if (opterr) 680 fprintf (stderr, _("%s: option `%s' is ambiguous\n"), 681 argv[0], argv[optind]); 682 nextchar += strlen (nextchar); 683 optind++; 684 optopt = 0; 685 return '?'; 686 } 687 688 if (pfound != NULL) 689 { 690 option_index = indfound; 691 optind++; 692 if (*nameend) 693 { 694 /* Don't test has_arg with >, because some C compilers don't 695 allow it to be used on enums. */ 696 if (pfound->has_arg) 697 optarg = nameend + 1; 698 else 699 { 700 if (opterr) 701 { 702 if (argv[optind - 1][1] == '-') 703 /* --option */ 704 fprintf (stderr, 705 _("%s: option `--%s' doesn't allow an argument\n"), 706 argv[0], pfound->name); 707 else 708 /* +option or -option */ 709 fprintf (stderr, 710 _("%s: option `%c%s' doesn't allow an argument\n"), 711 argv[0], argv[optind - 1][0], pfound->name); 712 } 713 714 nextchar += strlen (nextchar); 715 716 optopt = pfound->val; 717 return '?'; 718 } 719 } 720 else if (pfound->has_arg == 1) 721 { 722 if (optind < argc) 723 optarg = argv[optind++]; 724 else 725 { 726 if (opterr) 727 fprintf (stderr, 728 _("%s: option `%s' requires an argument\n"), 729 argv[0], argv[optind - 1]); 730 nextchar += strlen (nextchar); 731 optopt = pfound->val; 732 return optstring[0] == ':' ? ':' : '?'; 733 } 734 } 735 nextchar += strlen (nextchar); 736 if (longind != NULL) 737 *longind = option_index; 738 if (pfound->flag) 739 { 740 *(pfound->flag) = pfound->val; 741 return 0; 742 } 743 return pfound->val; 744 } 745 746 /* Can't find it as a long option. If this is not getopt_long_only, 747 or the option starts with '--' or is not a valid short 748 option, then it's an error. 749 Otherwise interpret it as a short option. */ 750 if (!long_only || argv[optind][1] == '-' 751 || my_index (optstring, *nextchar) == NULL) 752 { 753 if (opterr) 754 { 755 if (argv[optind][1] == '-') 756 /* --option */ 757 fprintf (stderr, _("%s: unrecognized option `--%s'\n"), 758 argv[0], nextchar); 759 else 760 /* +option or -option */ 761 fprintf (stderr, _("%s: unrecognized option `%c%s'\n"), 762 argv[0], argv[optind][0], nextchar); 763 } 764 nextchar = (char *) ""; 765 optind++; 766 optopt = 0; 767 return '?'; 768 } 769 } 770 771 /* Look at and handle the next short option-character. */ 772 773 { 774 char c = *nextchar++; 775 char *temp = my_index (optstring, c); 776 777 /* Increment `optind' when we start to process its last character. */ 778 if (*nextchar == '\0') 779 ++optind; 780 781 if (temp == NULL || c == ':') 782 { 783 if (opterr) 784 { 785 if (posixly_correct) 786 /* 1003.2 specifies the format of this message. */ 787 fprintf (stderr, _("%s: illegal option -- %c\n"), 788 argv[0], c); 789 else 790 fprintf (stderr, _("%s: invalid option -- %c\n"), 791 argv[0], c); 792 } 793 optopt = c; 794 return '?'; 795 } 796 /* Convenience. Treat POSIX -W foo same as long option --foo */ 797 if (temp[0] == 'W' && temp[1] == ';') 798 { 799 char *nameend; 800 const struct option *p; 801 const struct option *pfound = NULL; 802 int exact = 0; 803 int ambig = 0; 804 int indfound = 0; 805 int option_index; 806 807 /* This is an option that requires an argument. */ 808 if (*nextchar != '\0') 809 { 810 optarg = nextchar; 811 /* If we end this ARGV-element by taking the rest as an arg, 812 we must advance to the next element now. */ 813 optind++; 814 } 815 else if (optind == argc) 816 { 817 if (opterr) 818 { 819 /* 1003.2 specifies the format of this message. */ 820 fprintf (stderr, _("%s: option requires an argument -- %c\n"), 821 argv[0], c); 822 } 823 optopt = c; 824 if (optstring[0] == ':') 825 c = ':'; 826 else 827 c = '?'; 828 return c; 829 } 830 else 831 /* We already incremented `optind' once; 832 increment it again when taking next ARGV-elt as argument. */ 833 optarg = argv[optind++]; 834 835 /* optarg is now the argument, see if it's in the 836 table of longopts. */ 837 838 for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++) 839 /* Do nothing. */ ; 840 841 /* Test all long options for either exact match 842 or abbreviated matches. */ 843 for (p = longopts, option_index = 0; p->name; p++, option_index++) 844 if (!strncmp (p->name, nextchar, nameend - nextchar)) 845 { 846 if ((unsigned int) (nameend - nextchar) == strlen (p->name)) 847 { 848 /* Exact match found. */ 849 pfound = p; 850 indfound = option_index; 851 exact = 1; 852 break; 853 } 854 else if (pfound == NULL) 855 { 856 /* First nonexact match found. */ 857 pfound = p; 858 indfound = option_index; 859 } 860 else 861 /* Second or later nonexact match found. */ 862 ambig = 1; 863 } 864 if (ambig && !exact) 865 { 866 if (opterr) 867 fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"), 868 argv[0], argv[optind]); 869 nextchar += strlen (nextchar); 870 optind++; 871 return '?'; 872 } 873 if (pfound != NULL) 874 { 875 option_index = indfound; 876 if (*nameend) 877 { 878 /* Don't test has_arg with >, because some C compilers don't 879 allow it to be used on enums. */ 880 if (pfound->has_arg) 881 optarg = nameend + 1; 882 else 883 { 884 if (opterr) 885 fprintf (stderr, _("\ 886%s: option `-W %s' doesn't allow an argument\n"), 887 argv[0], pfound->name); 888 889 nextchar += strlen (nextchar); 890 return '?'; 891 } 892 } 893 else if (pfound->has_arg == 1) 894 { 895 if (optind < argc) 896 optarg = argv[optind++]; 897 else 898 { 899 if (opterr) 900 fprintf (stderr, 901 _("%s: option `%s' requires an argument\n"), 902 argv[0], argv[optind - 1]); 903 nextchar += strlen (nextchar); 904 return optstring[0] == ':' ? ':' : '?'; 905 } 906 } 907 nextchar += strlen (nextchar); 908 if (longind != NULL) 909 *longind = option_index; 910 if (pfound->flag) 911 { 912 *(pfound->flag) = pfound->val; 913 return 0; 914 } 915 return pfound->val; 916 } 917 nextchar = NULL; 918 return 'W'; /* Let the application handle it. */ 919 } 920 if (temp[1] == ':') 921 { 922 if (temp[2] == ':') 923 { 924 /* This is an option that accepts an argument optionally. */ 925 if (*nextchar != '\0') 926 { 927 optarg = nextchar; 928 optind++; 929 } 930 else 931 optarg = NULL; 932 nextchar = NULL; 933 } 934 else 935 { 936 /* This is an option that requires an argument. */ 937 if (*nextchar != '\0') 938 { 939 optarg = nextchar; 940 /* If we end this ARGV-element by taking the rest as an arg, 941 we must advance to the next element now. */ 942 optind++; 943 } 944 else if (optind == argc) 945 { 946 if (opterr) 947 { 948 /* 1003.2 specifies the format of this message. */ 949 fprintf (stderr, 950 _("%s: option requires an argument -- %c\n"), 951 argv[0], c); 952 } 953 optopt = c; 954 if (optstring[0] == ':') 955 c = ':'; 956 else 957 c = '?'; 958 } 959 else 960 /* We already incremented `optind' once; 961 increment it again when taking next ARGV-elt as argument. */ 962 optarg = argv[optind++]; 963 nextchar = NULL; 964 } 965 } 966 return c; 967 } 968} 969 970int 971getopt (argc, argv, optstring) 972 int argc; 973 char *const *argv; 974 const char *optstring; 975{ 976 return _getopt_internal (argc, argv, optstring, 977 (const struct option *) 0, 978 (int *) 0, 979 0); 980} 981 982#endif /* Not ELIDE_CODE. */ 983 984#ifdef TEST 985 986/* Compile with -DTEST to make an executable for use in testing 987 the above definition of `getopt'. */ 988 989int 990main (argc, argv) 991 int argc; 992 char **argv; 993{ 994 int c; 995 int digit_optind = 0; 996 997 while (1) 998 { 999 int this_option_optind = optind ? optind : 1; 1000 1001 c = getopt (argc, argv, "abc:d:0123456789"); 1002 if (c == -1) 1003 break; 1004 1005 switch (c) 1006 { 1007 case '0': 1008 case '1': 1009 case '2': 1010 case '3': 1011 case '4': 1012 case '5': 1013 case '6': 1014 case '7': 1015 case '8': 1016 case '9': 1017 if (digit_optind != 0 && digit_optind != this_option_optind) 1018 printf ("digits occur in two different argv-elements.\n"); 1019 digit_optind = this_option_optind; 1020 printf ("option %c\n", c); 1021 break; 1022 1023 case 'a': 1024 printf ("option a\n"); 1025 break; 1026 1027 case 'b': 1028 printf ("option b\n"); 1029 break; 1030 1031 case 'c': 1032 printf ("option c with value `%s'\n", optarg); 1033 break; 1034 1035 case '?': 1036 break; 1037 1038 default: 1039 printf ("?? getopt returned character code 0%o ??\n", c); 1040 } 1041 } 1042 1043 if (optind < argc) 1044 { 1045 printf ("non-option ARGV-elements: "); 1046 while (optind < argc) 1047 printf ("%s ", argv[optind++]); 1048 printf ("\n"); 1049 } 1050 1051 exit (0); 1052} 1053 1054#endif /* TEST */ 1055