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) 1987-2025 Free Software Foundation, Inc.
7
8 NOTE: This source is derived from an old version taken from the GNU C
9 Library (glibc).
10
11 This program is free software; you can redistribute it and/or modify it
12 under the terms of the GNU General Public License as published by the
13 Free Software Foundation; either version 2, or (at your option) any
14 later version.
15
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
20
21 You should have received a copy of the GNU General Public License
22 along with this program; if not, write to the Free Software
23 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301,
24 USA. */
25
26#ifdef HAVE_CONFIG_H
27# include <config.h>
28#endif
29
30#if !defined __STDC__ || !__STDC__
31/* This is a separate conditional since some stdc systems
32 reject `defined (const)'. */
33# ifndef const
34# define const
35# endif
36#endif
37
38#include "ansidecl.h"
39#include <stdio.h>
40
41/* Comment out all this code if we are using the GNU C Library, and are not
42 actually compiling the library itself. This code is part of the GNU C
43 Library, but also included in many other GNU distributions. Compiling
44 and linking in this code is a waste when using the GNU C library
45 (especially if it is a shared library). Rather than having every GNU
46 program understand `configure --with-gnu-libc' and omit the object files,
47 it is simpler to just do this in the source for each such file. */
48
49#define GETOPT_INTERFACE_VERSION 2
50#if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2
51# include <gnu-versions.h>
52# if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
53# define ELIDE_CODE
54# endif
55#endif
56
57#ifndef ELIDE_CODE
58
59
60/* This needs to come after some library #include
61 to get __GNU_LIBRARY__ defined. */
62#ifdef __GNU_LIBRARY__
63/* Don't include stdlib.h for non-GNU C libraries because some of them
64 contain conflicting prototypes for getopt. */
65# include <stdlib.h>
66# include <unistd.h>
67#endif /* GNU C library. */
68
69#ifdef VMS
70# include <unixlib.h>
71# if HAVE_STRING_H - 0
72# include <string.h>
73# endif
74#endif
75
76#ifndef _
77/* This is for other GNU distributions with internationalized messages.
78 When compiling libc, the _ macro is predefined. */
79# if (HAVE_LIBINTL_H && ENABLE_NLS) || defined _LIBC
80# include <libintl.h>
81# define _(msgid) gettext (msgid)
82# else
83# define _(msgid) (msgid)
84# endif
85#endif
86
87/* This version of `getopt' appears to the caller like standard Unix `getopt'
88 but it behaves differently for the user, since it allows the user
89 to intersperse the options with the other arguments.
90
91 As `getopt' works, it permutes the elements of ARGV so that,
92 when it is done, all the options precede everything else. Thus
93 all application programs are extended to handle flexible argument order.
94
95 Setting the environment variable POSIXLY_CORRECT disables permutation.
96 Then the behavior is completely standard.
97
98 GNU application programs can use a third alternative mode in which
99 they can distinguish the relative order of options and other arguments. */
100
101#include "getopt.h"
102
103/* For communication from `getopt' to the caller.
104 When `getopt' finds an option that takes an argument,
105 the argument value is returned here.
106 Also, when `ordering' is RETURN_IN_ORDER,
107 each non-option ARGV-element is returned here. */
108
109char *optarg = NULL;
110
111/* Index in ARGV of the next element to be scanned.
112 This is used for communication to and from the caller
113 and for communication between successive calls to `getopt'.
114
115 On entry to `getopt', zero means this is the first call; initialize.
116
117 When `getopt' returns -1, this is the index of the first of the
118 non-option elements that the caller should itself scan.
119
120 Otherwise, `optind' communicates from one call to the next
121 how much of ARGV has been scanned so far. */
122
123/* 1003.2 says this must be 1 before any call. */
124int optind = 1;
125
126/* Formerly, initialization of getopt depended on optind==0, which
127 causes problems with re-calling getopt as programs generally don't
128 know that. */
129
130int __getopt_initialized = 0;
131
132/* The next char to be scanned in the option-element
133 in which the last option character we returned was found.
134 This allows us to pick up the scan where we left off.
135
136 If this is zero, or a null string, it means resume the scan
137 by advancing to the next ARGV-element. */
138
139static char *nextchar;
140
141/* Callers store zero here to inhibit the error message
142 for unrecognized options. */
143
144int opterr = 1;
145
146/* Set to an option character which was unrecognized.
147 This must be initialized on some systems to avoid linking in the
148 system's own getopt implementation. */
149
150int optopt = '?';
151
152/* Describe how to deal with options that follow non-option ARGV-elements.
153
154 If the caller did not specify anything,
155 the default is REQUIRE_ORDER if the environment variable
156 POSIXLY_CORRECT is defined, PERMUTE otherwise.
157
158 REQUIRE_ORDER means don't recognize them as options;
159 stop option processing when the first non-option is seen.
160 This is what Unix does.
161 This mode of operation is selected by either setting the environment
162 variable POSIXLY_CORRECT, or using `+' as the first character
163 of the list of option characters.
164
165 PERMUTE is the default. We permute the contents of ARGV as we scan,
166 so that eventually all the non-options are at the end. This allows options
167 to be given in any order, even with programs that were not written to
168 expect this.
169
170 RETURN_IN_ORDER is an option available to programs that were written
171 to expect options and other ARGV-elements in any order and that care about
172 the ordering of the two. We describe each non-option ARGV-element
173 as if it were the argument of an option with character code 1.
174 Using `-' as the first character of the list of option characters
175 selects this mode of operation.
176
177 The special argument `--' forces an end of option-scanning regardless
178 of the value of `ordering'. In the case of RETURN_IN_ORDER, only
179 `--' can cause `getopt' to return -1 with `optind' != ARGC. */
180
181static enum
182{
183 REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
184} ordering;
185
186/* Value of POSIXLY_CORRECT environment variable. */
187static char *posixly_correct;
188
189#ifdef __GNU_LIBRARY__
190/* We want to avoid inclusion of string.h with non-GNU libraries
191 because there are many ways it can cause trouble.
192 On some systems, it contains special magic macros that don't work
193 in GCC. */
194# include <string.h>
195# define my_index strchr
196#else
197
198# if HAVE_STRING_H
199# include <string.h>
200# else
201# if HAVE_STRINGS_H
202# include <strings.h>
203# endif
204# endif
205
206/* Avoid depending on library functions or files
207 whose names are inconsistent. */
208
209#if HAVE_STDLIB_H && HAVE_DECL_GETENV
210# include <stdlib.h>
211#elif !defined(getenv)
212# ifdef __cplusplus
213extern "C" {
214# endif /* __cplusplus */
215extern char *getenv (const char *);
216# ifdef __cplusplus
217}
218# endif /* __cplusplus */
219#endif
220
221static char *
222my_index (const char *str, int chr)
223{
224 while (*str)
225 {
226 if (*str == chr)
227 return (char *) str;
228 str++;
229 }
230 return 0;
231}
232
233/* If using GCC, we can safely declare strlen this way.
234 If not using GCC, it is ok not to declare it. */
235#ifdef __GNUC__
236/* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h.
237 That was relevant to code that was here before. */
238# if (!defined __STDC__ || !__STDC__) && !defined strlen
239/* gcc with -traditional declares the built-in strlen to return int,
240 and has done so at least since version 2.4.5. -- rms. */
241extern int strlen (const char *);
242# endif /* not __STDC__ */
243#endif /* __GNUC__ */
244
245#endif /* not __GNU_LIBRARY__ */
246
247/* Handle permutation of arguments. */
248
249/* Describe the part of ARGV that contains non-options that have
250 been skipped. `first_nonopt' is the index in ARGV of the first of them;
251 `last_nonopt' is the index after the last of them. */
252
253static int first_nonopt;
254static int last_nonopt;
255
256#ifdef _LIBC
257/* Bash 2.0 gives us an environment variable containing flags
258 indicating ARGV elements that should not be considered arguments. */
259
260/* Defined in getopt_init.c */
261extern char *__getopt_nonoption_flags;
262
263static int nonoption_flags_max_len;
264static int nonoption_flags_len;
265
266static int original_argc;
267static char *const *original_argv;
268
269/* Make sure the environment variable bash 2.0 puts in the environment
270 is valid for the getopt call we must make sure that the ARGV passed
271 to getopt is that one passed to the process. */
272static void
273__attribute__ ((unused))
274store_args_and_env (int argc, char *const *argv)
275{
276 /* XXX This is no good solution. We should rather copy the args so
277 that we can compare them later. But we must not use malloc(3). */
278 original_argc = argc;
279 original_argv = argv;
280}
281# ifdef text_set_element
282text_set_element (__libc_subinit, store_args_and_env);
283# endif /* text_set_element */
284
285# define SWAP_FLAGS(ch1, ch2) \
286 if (nonoption_flags_len > 0) \
287 { \
288 char __tmp = __getopt_nonoption_flags[ch1]; \
289 __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \
290 __getopt_nonoption_flags[ch2] = __tmp; \
291 }
292#else /* !_LIBC */
293# define SWAP_FLAGS(ch1, ch2)
294#endif /* _LIBC */
295
296/* Exchange two adjacent subsequences of ARGV.
297 One subsequence is elements [first_nonopt,last_nonopt)
298 which contains all the non-options that have been skipped so far.
299 The other is elements [last_nonopt,optind), which contains all
300 the options processed since those non-options were skipped.
301
302 `first_nonopt' and `last_nonopt' are relocated so that they describe
303 the new indices of the non-options in ARGV after they are moved. */
304
305#if defined __STDC__ && __STDC__
306static void exchange (char **);
307#endif
308
309static void
310exchange (char **argv)
311{
312 int bottom = first_nonopt;
313 int middle = last_nonopt;
314 int top = optind;
315 char *tem;
316
317 /* Exchange the shorter segment with the far end of the longer segment.
318 That puts the shorter segment into the right place.
319 It leaves the longer segment in the right place overall,
320 but it consists of two parts that need to be swapped next. */
321
322#ifdef _LIBC
323 /* First make sure the handling of the `__getopt_nonoption_flags'
324 string can work normally. Our top argument must be in the range
325 of the string. */
326 if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len)
327 {
328 /* We must extend the array. The user plays games with us and
329 presents new arguments. */
330 char *new_str = (char *) malloc (top + 1);
331 if (new_str == NULL)
332 nonoption_flags_len = nonoption_flags_max_len = 0;
333 else
334 {
335 memset (mempcpy (new_str, __getopt_nonoption_flags,
336 nonoption_flags_max_len),
337 '\0', top + 1 - nonoption_flags_max_len);
338 nonoption_flags_max_len = top + 1;
339 __getopt_nonoption_flags = new_str;
340 }
341 }
342#endif
343
344 while (top > middle && middle > bottom)
345 {
346 if (top - middle > middle - bottom)
347 {
348 /* Bottom segment is the short one. */
349 int len = middle - bottom;
350 register int i;
351
352 /* Swap it with the top part of the top segment. */
353 for (i = 0; i < len; i++)
354 {
355 tem = argv[bottom + i];
356 argv[bottom + i] = argv[top - (middle - bottom) + i];
357 argv[top - (middle - bottom) + i] = tem;
358 SWAP_FLAGS (bottom + i, top - (middle - bottom) + i);
359 }
360 /* Exclude the moved bottom segment from further swapping. */
361 top -= len;
362 }
363 else
364 {
365 /* Top segment is the short one. */
366 int len = top - middle;
367 register int i;
368
369 /* Swap it with the bottom part of the bottom segment. */
370 for (i = 0; i < len; i++)
371 {
372 tem = argv[bottom + i];
373 argv[bottom + i] = argv[middle + i];
374 argv[middle + i] = tem;
375 SWAP_FLAGS (bottom + i, middle + i);
376 }
377 /* Exclude the moved top segment from further swapping. */
378 bottom += len;
379 }
380 }
381
382 /* Update records for the slots the non-options now occupy. */
383
384 first_nonopt += (optind - last_nonopt);
385 last_nonopt = optind;
386}
387
388/* Initialize the internal data when the first call is made. */
389
390#if defined __STDC__ && __STDC__
391static const char *_getopt_initialize (int, char *const *, const char *);
392#endif
393static const char *
394_getopt_initialize (int argc ATTRIBUTE_UNUSED,
395 char *const *argv ATTRIBUTE_UNUSED,
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 (int argc, char *const *argv, const char *optstring,
516 const struct option *longopts,
517 int *longind, int long_only)
518{
519 optarg = NULL;
520
521 if (optind == 0 || !__getopt_initialized)
522 {
523 if (optind == 0)
524 optind = 1; /* Don't scan ARGV[0], the program name. */
525 optstring = _getopt_initialize (argc, argv, optstring);
526 __getopt_initialized = 1;
527 }
528
529 /* Test whether ARGV[optind] points to a non-option argument.
530 Either it does not have option syntax, or there is an environment flag
531 from the shell indicating it is not an option. The later information
532 is only used when the used in the GNU libc. */
533#ifdef _LIBC
534# define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \
535 || (optind < nonoption_flags_len \
536 && __getopt_nonoption_flags[optind] == '1'))
537#else
538# define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0')
539#endif
540
541 if (nextchar == NULL || *nextchar == '\0')
542 {
543 /* Advance to the next ARGV-element. */
544
545 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been
546 moved back by the user (who may also have changed the arguments). */
547 if (last_nonopt > optind)
548 last_nonopt = optind;
549 if (first_nonopt > optind)
550 first_nonopt = optind;
551
552 if (ordering == PERMUTE)
553 {
554 /* If we have just processed some options following some non-options,
555 exchange them so that the options come first. */
556
557 if (first_nonopt != last_nonopt && last_nonopt != optind)
558 exchange ((char **) argv);
559 else if (last_nonopt != optind)
560 first_nonopt = optind;
561
562 /* Skip any additional non-options
563 and extend the range of non-options previously skipped. */
564
565 while (optind < argc && NONOPTION_P)
566 optind++;
567 last_nonopt = optind;
568 }
569
570 /* The special ARGV-element `--' means premature end of options.
571 Skip it like a null option,
572 then exchange with previous non-options as if it were an option,
573 then skip everything else like a non-option. */
574
575 if (optind != argc && !strcmp (argv[optind], "--"))
576 {
577 optind++;
578
579 if (first_nonopt != last_nonopt && last_nonopt != optind)
580 exchange ((char **) argv);
581 else if (first_nonopt == last_nonopt)
582 first_nonopt = optind;
583 last_nonopt = argc;
584
585 optind = argc;
586 }
587
588 /* If we have done all the ARGV-elements, stop the scan
589 and back over any non-options that we skipped and permuted. */
590
591 if (optind == argc)
592 {
593 /* Set the next-arg-index to point at the non-options
594 that we previously skipped, so the caller will digest them. */
595 if (first_nonopt != last_nonopt)
596 optind = first_nonopt;
597 return -1;
598 }
599
600 /* If we have come to a non-option and did not permute it,
601 either stop the scan or describe it to the caller and pass it by. */
602
603 if (NONOPTION_P)
604 {
605 if (ordering == REQUIRE_ORDER)
606 return -1;
607 optarg = argv[optind++];
608 return 1;
609 }
610
611 /* We have found another option-ARGV-element.
612 Skip the initial punctuation. */
613
614 nextchar = (argv[optind] + 1
615 + (longopts != NULL && argv[optind][1] == '-'));
616 }
617
618 /* Decode the current option-ARGV-element. */
619
620 /* Check whether the ARGV-element is a long option.
621
622 If long_only and the ARGV-element has the form "-f", where f is
623 a valid short option, don't consider it an abbreviated form of
624 a long option that starts with f. Otherwise there would be no
625 way to give the -f short option.
626
627 On the other hand, if there's a long option "fubar" and
628 the ARGV-element is "-fu", do consider that an abbreviation of
629 the long option, just like "--fu", and not "-f" with arg "u".
630
631 This distinction seems to be the most useful approach. */
632
633 if (longopts != NULL
634 && (argv[optind][1] == '-'
635 || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1])))))
636 {
637 char *nameend;
638 const struct option *p;
639 const struct option *pfound = NULL;
640 int exact = 0;
641 int ambig = 0;
642 int indfound = -1;
643 int option_index;
644
645 for (nameend = nextchar; *nameend && *nameend != '='; nameend++)
646 /* Do nothing. */ ;
647
648 /* Test all long options for either exact match
649 or abbreviated matches. */
650 for (p = longopts, option_index = 0; p->name; p++, option_index++)
651 if (!strncmp (p->name, nextchar, nameend - nextchar))
652 {
653 if ((unsigned int) (nameend - nextchar)
654 == (unsigned int) strlen (p->name))
655 {
656 /* Exact match found. */
657 pfound = p;
658 indfound = option_index;
659 exact = 1;
660 break;
661 }
662 else if (pfound == NULL)
663 {
664 /* First nonexact match found. */
665 pfound = p;
666 indfound = option_index;
667 }
668 else
669 /* Second or later nonexact match found. */
670 ambig = 1;
671 }
672
673 if (ambig && !exact)
674 {
675 if (opterr)
676 fprintf (stderr, _("%s: option `%s' is ambiguous\n"),
677 argv[0], argv[optind]);
678 nextchar += strlen (nextchar);
679 optind++;
680 optopt = 0;
681 return '?';
682 }
683
684 if (pfound != NULL)
685 {
686 option_index = indfound;
687 optind++;
688 if (*nameend)
689 {
690 /* Don't test has_arg with >, because some C compilers don't
691 allow it to be used on enums. */
692 if (pfound->has_arg)
693 optarg = nameend + 1;
694 else
695 {
696 if (opterr)
697 {
698 if (argv[optind - 1][1] == '-')
699 /* --option */
700 fprintf (stderr,
701 _("%s: option `--%s' doesn't allow an argument\n"),
702 argv[0], pfound->name);
703 else
704 /* +option or -option */
705 fprintf (stderr,
706 _("%s: option `%c%s' doesn't allow an argument\n"),
707 argv[0], argv[optind - 1][0], pfound->name);
708
709 nextchar += strlen (nextchar);
710
711 optopt = pfound->val;
712 return '?';
713 }
714 }
715 }
716 else if (pfound->has_arg == 1)
717 {
718 if (optind < argc)
719 optarg = argv[optind++];
720 else
721 {
722 if (opterr)
723 fprintf (stderr,
724 _("%s: option `%s' requires an argument\n"),
725 argv[0], argv[optind - 1]);
726 nextchar += strlen (nextchar);
727 optopt = pfound->val;
728 return optstring[0] == ':' ? ':' : '?';
729 }
730 }
731 nextchar += strlen (nextchar);
732 if (longind != NULL)
733 *longind = option_index;
734 if (pfound->flag)
735 {
736 *(pfound->flag) = pfound->val;
737 return 0;
738 }
739 return pfound->val;
740 }
741
742 /* Can't find it as a long option. If this is not getopt_long_only,
743 or the option starts with '--' or is not a valid short
744 option, then it's an error.
745 Otherwise interpret it as a short option. */
746 if (!long_only || argv[optind][1] == '-'
747 || my_index (optstring, *nextchar) == NULL)
748 {
749 if (opterr)
750 {
751 if (argv[optind][1] == '-')
752 /* --option */
753 fprintf (stderr, _("%s: unrecognized option `--%s'\n"),
754 argv[0], nextchar);
755 else
756 /* +option or -option */
757 fprintf (stderr, _("%s: unrecognized option `%c%s'\n"),
758 argv[0], argv[optind][0], nextchar);
759 }
760 nextchar = (char *) "";
761 optind++;
762 optopt = 0;
763 return '?';
764 }
765 }
766
767 /* Look at and handle the next short option-character. */
768
769 {
770 char c = *nextchar++;
771 char *temp = my_index (optstring, c);
772
773 /* Increment `optind' when we start to process its last character. */
774 if (*nextchar == '\0')
775 ++optind;
776
777 if (temp == NULL || c == ':')
778 {
779 if (opterr)
780 {
781 if (posixly_correct)
782 /* 1003.2 specifies the format of this message. */
783 fprintf (stderr, _("%s: illegal option -- %c\n"),
784 argv[0], c);
785 else
786 fprintf (stderr, _("%s: invalid option -- %c\n"),
787 argv[0], c);
788 }
789 optopt = c;
790 return '?';
791 }
792 /* Convenience. Treat POSIX -W foo same as long option --foo */
793 if (temp[0] == 'W' && temp[1] == ';')
794 {
795 char *nameend;
796 const struct option *p;
797 const struct option *pfound = NULL;
798 int exact = 0;
799 int ambig = 0;
800 int indfound = 0;
801 int option_index;
802
803 /* This is an option that requires an argument. */
804 if (*nextchar != '\0')
805 {
806 optarg = nextchar;
807 /* If we end this ARGV-element by taking the rest as an arg,
808 we must advance to the next element now. */
809 optind++;
810 }
811 else if (optind == argc)
812 {
813 if (opterr)
814 {
815 /* 1003.2 specifies the format of this message. */
816 fprintf (stderr, _("%s: option requires an argument -- %c\n"),
817 argv[0], c);
818 }
819 optopt = c;
820 if (optstring[0] == ':')
821 c = ':';
822 else
823 c = '?';
824 return c;
825 }
826 else
827 /* We already incremented `optind' once;
828 increment it again when taking next ARGV-elt as argument. */
829 optarg = argv[optind++];
830
831 /* optarg is now the argument, see if it's in the
832 table of longopts. */
833
834 for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++)
835 /* Do nothing. */ ;
836
837 /* Test all long options for either exact match
838 or abbreviated matches. */
839 for (p = longopts, option_index = 0; p->name; p++, option_index++)
840 if (!strncmp (p->name, nextchar, nameend - nextchar))
841 {
842 if ((unsigned int) (nameend - nextchar) == strlen (p->name))
843 {
844 /* Exact match found. */
845 pfound = p;
846 indfound = option_index;
847 exact = 1;
848 break;
849 }
850 else if (pfound == NULL)
851 {
852 /* First nonexact match found. */
853 pfound = p;
854 indfound = option_index;
855 }
856 else
857 /* Second or later nonexact match found. */
858 ambig = 1;
859 }
860 if (ambig && !exact)
861 {
862 if (opterr)
863 fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"),
864 argv[0], argv[optind]);
865 nextchar += strlen (nextchar);
866 optind++;
867 return '?';
868 }
869 if (pfound != NULL)
870 {
871 option_index = indfound;
872 if (*nameend)
873 {
874 /* Don't test has_arg with >, because some C compilers don't
875 allow it to be used on enums. */
876 if (pfound->has_arg)
877 optarg = nameend + 1;
878 else
879 {
880 if (opterr)
881 fprintf (stderr, _("\
882%s: option `-W %s' doesn't allow an argument\n"),
883 argv[0], pfound->name);
884
885 nextchar += strlen (nextchar);
886 return '?';
887 }
888 }
889 else if (pfound->has_arg == 1)
890 {
891 if (optind < argc)
892 optarg = argv[optind++];
893 else
894 {
895 if (opterr)
896 fprintf (stderr,
897 _("%s: option `%s' requires an argument\n"),
898 argv[0], argv[optind - 1]);
899 nextchar += strlen (nextchar);
900 return optstring[0] == ':' ? ':' : '?';
901 }
902 }
903 nextchar += strlen (nextchar);
904 if (longind != NULL)
905 *longind = option_index;
906 if (pfound->flag)
907 {
908 *(pfound->flag) = pfound->val;
909 return 0;
910 }
911 return pfound->val;
912 }
913 nextchar = NULL;
914 return 'W'; /* Let the application handle it. */
915 }
916 if (temp[1] == ':')
917 {
918 if (temp[2] == ':')
919 {
920 /* This is an option that accepts an argument optionally. */
921 if (*nextchar != '\0')
922 {
923 optarg = nextchar;
924 optind++;
925 }
926 else
927 optarg = NULL;
928 nextchar = NULL;
929 }
930 else
931 {
932 /* This is an option that requires an argument. */
933 if (*nextchar != '\0')
934 {
935 optarg = nextchar;
936 /* If we end this ARGV-element by taking the rest as an arg,
937 we must advance to the next element now. */
938 optind++;
939 }
940 else if (optind == argc)
941 {
942 if (opterr)
943 {
944 /* 1003.2 specifies the format of this message. */
945 fprintf (stderr,
946 _("%s: option requires an argument -- %c\n"),
947 argv[0], c);
948 }
949 optopt = c;
950 if (optstring[0] == ':')
951 c = ':';
952 else
953 c = '?';
954 }
955 else
956 /* We already incremented `optind' once;
957 increment it again when taking next ARGV-elt as argument. */
958 optarg = argv[optind++];
959 nextchar = NULL;
960 }
961 }
962 return c;
963 }
964}
965
966int
967getopt (int argc, char *const *argv, const char *optstring)
968{
969 return _getopt_internal (argc, argv, optstring,
970 (const struct option *) 0,
971 (int *) 0,
972 0);
973}
974
975#endif /* Not ELIDE_CODE. */
976
977#ifdef TEST
978
979/* Compile with -DTEST to make an executable for use in testing
980 the above definition of `getopt'. */
981
982int
983main (int argc, char **argv)
984{
985 int c;
986 int digit_optind = 0;
987
988 while (1)
989 {
990 int this_option_optind = optind ? optind : 1;
991
992 c = getopt (argc, argv, "abc:d:0123456789");
993 if (c == -1)
994 break;
995
996 switch (c)
997 {
998 case '0':
999 case '1':
1000 case '2':
1001 case '3':
1002 case '4':
1003 case '5':
1004 case '6':
1005 case '7':
1006 case '8':
1007 case '9':
1008 if (digit_optind != 0 && digit_optind != this_option_optind)
1009 printf ("digits occur in two different argv-elements.\n");
1010 digit_optind = this_option_optind;
1011 printf ("option %c\n", c);
1012 break;
1013
1014 case 'a':
1015 printf ("option a\n");
1016 break;
1017
1018 case 'b':
1019 printf ("option b\n");
1020 break;
1021
1022 case 'c':
1023 printf ("option c with value `%s'\n", optarg);
1024 break;
1025
1026 case '?':
1027 break;
1028
1029 default:
1030 printf ("?? getopt returned character code 0%o ??\n", c);
1031 }
1032 }
1033
1034 if (optind < argc)
1035 {
1036 printf ("non-option ARGV-elements: ");
1037 while (optind < argc)
1038 printf ("%s ", argv[optind++]);
1039 printf ("\n");
1040 }
1041
1042 exit (0);
1043}
1044
1045#endif /* TEST */
1046

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source code of libiberty/getopt.c