1/* $NetBSD$ */ 2 3/* Getopt for GNU. 4 NOTE: The canonical source of this file is maintained with the GNU 5 C Library. Bugs can be reported to bug-glibc@gnu.org. 6 7 Copyright (C) 1987, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99 8 Free Software Foundation, Inc. 9 10 This program is free software; you can redistribute it and/or modify it 11 under the terms of the GNU General Public License as published by the 12 Free Software Foundation; either version 2, or (at your option) any 13 later version. 14 15 This program is distributed in the hope that it will be useful, 16 but WITHOUT ANY WARRANTY; without even the implied warranty of 17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 GNU General Public License for more details. 19 20 You should have received a copy of the GNU General Public License 21 along with this program; if not, write to the Free Software Foundation, 22 Inc., 59 Temple Place - Suite 330, 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#else 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#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 size_t 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 optarg = NULL; 521 522 if (optind == 0 || !__getopt_initialized) 523 { 524 if (optind == 0) 525 optind = 1; /* Don't scan ARGV[0], the program name. */ 526 optstring = _getopt_initialize (argc, argv, optstring); 527 __getopt_initialized = 1; 528 } 529 530 /* Test whether ARGV[optind] points to a non-option argument. 531 Either it does not have option syntax, or there is an environment flag 532 from the shell indicating it is not an option. The later information 533 is only used when the used in the GNU libc. */ 534#ifdef _LIBC 535# define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \ 536 || (optind < nonoption_flags_len \ 537 && __getopt_nonoption_flags[optind] == '1')) 538#else 539# define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0') 540#endif 541 542 if (nextchar == NULL || *nextchar == '\0') 543 { 544 /* Advance to the next ARGV-element. */ 545 546 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been 547 moved back by the user (who may also have changed the arguments). */ 548 if (last_nonopt > optind) 549 last_nonopt = optind; 550 if (first_nonopt > optind) 551 first_nonopt = optind; 552 553 if (ordering == PERMUTE) 554 { 555 /* If we have just processed some options following some non-options, 556 exchange them so that the options come first. */ 557 558 if (first_nonopt != last_nonopt && last_nonopt != optind) 559 exchange ((char **) argv); 560 else if (last_nonopt != optind) 561 first_nonopt = optind; 562 563 /* Skip any additional non-options 564 and extend the range of non-options previously skipped. */ 565 566 while (optind < argc && NONOPTION_P) 567 optind++; 568 last_nonopt = optind; 569 } 570 571 /* The special ARGV-element `--' means premature end of options. 572 Skip it like a null option, 573 then exchange with previous non-options as if it were an option, 574 then skip everything else like a non-option. */ 575 576 if (optind != argc && !strcmp (argv[optind], "--")) 577 { 578 optind++; 579 580 if (first_nonopt != last_nonopt && last_nonopt != optind) 581 exchange ((char **) argv); 582 else if (first_nonopt == last_nonopt) 583 first_nonopt = optind; 584 last_nonopt = argc; 585 586 optind = argc; 587 } 588 589 /* If we have done all the ARGV-elements, stop the scan 590 and back over any non-options that we skipped and permuted. */ 591 592 if (optind == argc) 593 { 594 /* Set the next-arg-index to point at the non-options 595 that we previously skipped, so the caller will digest them. */ 596 if (first_nonopt != last_nonopt) 597 optind = first_nonopt; 598 return -1; 599 } 600 601 /* If we have come to a non-option and did not permute it, 602 either stop the scan or describe it to the caller and pass it by. */ 603 604 if (NONOPTION_P) 605 { 606 if (ordering == REQUIRE_ORDER) 607 return -1; 608 optarg = argv[optind++]; 609 return 1; 610 } 611 612 /* We have found another option-ARGV-element. 613 Skip the initial punctuation. */ 614 615 nextchar = (argv[optind] + 1 616 + (longopts != NULL && argv[optind][1] == '-')); 617 } 618 619 /* Decode the current option-ARGV-element. */ 620 621 /* Check whether the ARGV-element is a long option. 622 623 If long_only and the ARGV-element has the form "-f", where f is 624 a valid short option, don't consider it an abbreviated form of 625 a long option that starts with f. Otherwise there would be no 626 way to give the -f short option. 627 628 On the other hand, if there's a long option "fubar" and 629 the ARGV-element is "-fu", do consider that an abbreviation of 630 the long option, just like "--fu", and not "-f" with arg "u". 631 632 This distinction seems to be the most useful approach. */ 633 634 if (longopts != NULL 635 && (argv[optind][1] == '-' 636 || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1]))))) 637 { 638 char *nameend; 639 const struct option *p; 640 const struct option *pfound = NULL; 641 int exact = 0; 642 int ambig = 0; 643 int indfound = -1; 644 int option_index; 645 646 for (nameend = nextchar; *nameend && *nameend != '='; nameend++) 647 /* Do nothing. */ ; 648 649 /* Test all long options for either exact match 650 or abbreviated matches. */ 651 for (p = longopts, option_index = 0; p->name; p++, option_index++) 652 if (!strncmp (p->name, nextchar, nameend - nextchar)) 653 { 654 if ((unsigned int) (nameend - nextchar) 655 == (unsigned int) strlen (p->name)) 656 { 657 /* Exact match found. */ 658 pfound = p; 659 indfound = option_index; 660 exact = 1; 661 break; 662 } 663 else if (pfound == NULL) 664 { 665 /* First nonexact match found. */ 666 pfound = p; 667 indfound = option_index; 668 } 669 else 670 /* Second or later nonexact match found. */ 671 ambig = 1; 672 } 673 674 if (ambig && !exact) 675 { 676 if (opterr) 677 fprintf (stderr, _("%s: option `%s' is ambiguous\n"), 678 argv[0], argv[optind]); 679 nextchar += strlen (nextchar); 680 optind++; 681 optopt = 0; 682 return '?'; 683 } 684 685 if (pfound != NULL) 686 { 687 option_index = indfound; 688 optind++; 689 if (*nameend) 690 { 691 /* Don't test has_arg with >, because some C compilers don't 692 allow it to be used on enums. */ 693 if (pfound->has_arg) 694 optarg = nameend + 1; 695 else 696 { 697 if (opterr) 698 { 699 if (argv[optind - 1][1] == '-') 700 /* --option */ 701 fprintf (stderr, 702 _("%s: option `--%s' doesn't allow an argument\n"), 703 argv[0], pfound->name); 704 else 705 /* +option or -option */ 706 fprintf (stderr, 707 _("%s: option `%c%s' doesn't allow an argument\n"), 708 argv[0], argv[optind - 1][0], pfound->name); 709 } 710 711 nextchar += strlen (nextchar); 712 713 optopt = pfound->val; 714 return '?'; 715 } 716 } 717 else if (pfound->has_arg == 1) 718 { 719 if (optind < argc) 720 optarg = argv[optind++]; 721 else 722 { 723 if (opterr) 724 fprintf (stderr, 725 _("%s: option `%s' requires an argument\n"), 726 argv[0], argv[optind - 1]); 727 nextchar += strlen (nextchar); 728 optopt = pfound->val; 729 return optstring[0] == ':' ? ':' : '?'; 730 } 731 } 732 nextchar += strlen (nextchar); 733 if (longind != NULL) 734 *longind = option_index; 735 if (pfound->flag) 736 { 737 *(pfound->flag) = pfound->val; 738 return 0; 739 } 740 return pfound->val; 741 } 742 743 /* Can't find it as a long option. If this is not getopt_long_only, 744 or the option starts with '--' or is not a valid short 745 option, then it's an error. 746 Otherwise interpret it as a short option. */ 747 if (!long_only || argv[optind][1] == '-' 748 || my_index (optstring, *nextchar) == NULL) 749 { 750 if (opterr) 751 { 752 if (argv[optind][1] == '-') 753 /* --option */ 754 fprintf (stderr, _("%s: unrecognized option `--%s'\n"), 755 argv[0], nextchar); 756 else 757 /* +option or -option */ 758 fprintf (stderr, _("%s: unrecognized option `%c%s'\n"), 759 argv[0], argv[optind][0], nextchar); 760 } 761 nextchar = (char *) ""; 762 optind++; 763 optopt = 0; 764 return '?'; 765 } 766 } 767 768 /* Look at and handle the next short option-character. */ 769 770 { 771 char c = *nextchar++; 772 char *temp = my_index (optstring, c); 773 774 /* Increment `optind' when we start to process its last character. */ 775 if (*nextchar == '\0') 776 ++optind; 777 778 if (temp == NULL || c == ':') 779 { 780 if (opterr) 781 { 782 if (posixly_correct) 783 /* 1003.2 specifies the format of this message. */ 784 fprintf (stderr, _("%s: illegal option -- %c\n"), 785 argv[0], c); 786 else 787 fprintf (stderr, _("%s: invalid option -- %c\n"), 788 argv[0], c); 789 } 790 optopt = c; 791 return '?'; 792 } 793 /* Convenience. Treat POSIX -W foo same as long option --foo */ 794 if (temp[0] == 'W' && temp[1] == ';') 795 { 796 char *nameend; 797 const struct option *p; 798 const struct option *pfound = NULL; 799 int exact = 0; 800 int ambig = 0; 801 int indfound = 0; 802 int option_index; 803 804 /* This is an option that requires an argument. */ 805 if (*nextchar != '\0') 806 { 807 optarg = nextchar; 808 /* If we end this ARGV-element by taking the rest as an arg, 809 we must advance to the next element now. */ 810 optind++; 811 } 812 else if (optind == argc) 813 { 814 if (opterr) 815 { 816 /* 1003.2 specifies the format of this message. */ 817 fprintf (stderr, _("%s: option requires an argument -- %c\n"), 818 argv[0], c); 819 } 820 optopt = c; 821 if (optstring[0] == ':') 822 c = ':'; 823 else 824 c = '?'; 825 return c; 826 } 827 else 828 /* We already incremented `optind' once; 829 increment it again when taking next ARGV-elt as argument. */ 830 optarg = argv[optind++]; 831 832 /* optarg is now the argument, see if it's in the 833 table of longopts. */ 834 835 for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++) 836 /* Do nothing. */ ; 837 838 /* Test all long options for either exact match 839 or abbreviated matches. */ 840 for (p = longopts, option_index = 0; p->name; p++, option_index++) 841 if (!strncmp (p->name, nextchar, nameend - nextchar)) 842 { 843 if ((unsigned int) (nameend - nextchar) == strlen (p->name)) 844 { 845 /* Exact match found. */ 846 pfound = p; 847 indfound = option_index; 848 exact = 1; 849 break; 850 } 851 else if (pfound == NULL) 852 { 853 /* First nonexact match found. */ 854 pfound = p; 855 indfound = option_index; 856 } 857 else 858 /* Second or later nonexact match found. */ 859 ambig = 1; 860 } 861 if (ambig && !exact) 862 { 863 if (opterr) 864 fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"), 865 argv[0], argv[optind]); 866 nextchar += strlen (nextchar); 867 optind++; 868 return '?'; 869 } 870 if (pfound != NULL) 871 { 872 option_index = indfound; 873 if (*nameend) 874 { 875 /* Don't test has_arg with >, because some C compilers don't 876 allow it to be used on enums. */ 877 if (pfound->has_arg) 878 optarg = nameend + 1; 879 else 880 { 881 if (opterr) 882 fprintf (stderr, _("\ 883%s: option `-W %s' doesn't allow an argument\n"), 884 argv[0], pfound->name); 885 886 nextchar += strlen (nextchar); 887 return '?'; 888 } 889 } 890 else if (pfound->has_arg == 1) 891 { 892 if (optind < argc) 893 optarg = argv[optind++]; 894 else 895 { 896 if (opterr) 897 fprintf (stderr, 898 _("%s: option `%s' requires an argument\n"), 899 argv[0], argv[optind - 1]); 900 nextchar += strlen (nextchar); 901 return optstring[0] == ':' ? ':' : '?'; 902 } 903 } 904 nextchar += strlen (nextchar); 905 if (longind != NULL) 906 *longind = option_index; 907 if (pfound->flag) 908 { 909 *(pfound->flag) = pfound->val; 910 return 0; 911 } 912 return pfound->val; 913 } 914 nextchar = NULL; 915 return 'W'; /* Let the application handle it. */ 916 } 917 if (temp[1] == ':') 918 { 919 if (temp[2] == ':') 920 { 921 /* This is an option that accepts an argument optionally. */ 922 if (*nextchar != '\0') 923 { 924 optarg = nextchar; 925 optind++; 926 } 927 else 928 optarg = NULL; 929 nextchar = NULL; 930 } 931 else 932 { 933 /* This is an option that requires an argument. */ 934 if (*nextchar != '\0') 935 { 936 optarg = nextchar; 937 /* If we end this ARGV-element by taking the rest as an arg, 938 we must advance to the next element now. */ 939 optind++; 940 } 941 else if (optind == argc) 942 { 943 if (opterr) 944 { 945 /* 1003.2 specifies the format of this message. */ 946 fprintf (stderr, 947 _("%s: option requires an argument -- %c\n"), 948 argv[0], c); 949 } 950 optopt = c; 951 if (optstring[0] == ':') 952 c = ':'; 953 else 954 c = '?'; 955 } 956 else 957 /* We already incremented `optind' once; 958 increment it again when taking next ARGV-elt as argument. */ 959 optarg = argv[optind++]; 960 nextchar = NULL; 961 } 962 } 963 return c; 964 } 965} 966 967int 968getopt (argc, argv, optstring) 969 int argc; 970 char *const *argv; 971 const char *optstring; 972{ 973 return _getopt_internal (argc, argv, optstring, 974 (const struct option *) 0, 975 (int *) 0, 976 0); 977} 978 979#endif /* Not ELIDE_CODE. */ 980 981#ifdef TEST 982 983/* Compile with -DTEST to make an executable for use in testing 984 the above definition of `getopt'. */ 985 986int 987main (argc, argv) 988 int argc; 989 char **argv; 990{ 991 int c; 992 int digit_optind = 0; 993 994 while (1) 995 { 996 int this_option_optind = optind ? optind : 1; 997 998 c = getopt (argc, argv, "abc:d:0123456789"); 999 if (c == -1) 1000 break; 1001 1002 switch (c) 1003 { 1004 case '0': 1005 case '1': 1006 case '2': 1007 case '3': 1008 case '4': 1009 case '5': 1010 case '6': 1011 case '7': 1012 case '8': 1013 case '9': 1014 if (digit_optind != 0 && digit_optind != this_option_optind) 1015 printf ("digits occur in two different argv-elements.\n"); 1016 digit_optind = this_option_optind; 1017 printf ("option %c\n", c); 1018 break; 1019 1020 case 'a': 1021 printf ("option a\n"); 1022 break; 1023 1024 case 'b': 1025 printf ("option b\n"); 1026 break; 1027 1028 case 'c': 1029 printf ("option c with value `%s'\n", optarg); 1030 break; 1031 1032 case '?': 1033 break; 1034 1035 default: 1036 printf ("?? getopt returned character code 0%o ??\n", c); 1037 } 1038 } 1039 1040 if (optind < argc) 1041 { 1042 printf ("non-option ARGV-elements: "); 1043 while (optind < argc) 1044 printf ("%s ", argv[optind++]); 1045 printf ("\n"); 1046 } 1047 1048 exit (0); 1049} 1050 1051#endif /* TEST */ 1052