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author kent <kent@cr.ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2009 14:47:48 +0900
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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, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
7 1996, 1997, 1998, 2005 Free Software Foundation, Inc.
8
9 NOTE: This source is derived from an old version taken from the GNU C
10 Library (glibc).
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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301,
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 "ansidecl.h"
46 #include <stdio.h>
47
48 /* Comment out all this code if we are using the GNU C Library, and are not
49 actually compiling the library itself. This code is part of the GNU C
50 Library, but also included in many other GNU distributions. Compiling
51 and linking in this code is a waste when using the GNU C library
52 (especially if it is a shared library). Rather than having every GNU
53 program understand `configure --with-gnu-libc' and omit the object files,
54 it is simpler to just do this in the source for each such file. */
55
56 #define GETOPT_INTERFACE_VERSION 2
57 #if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2
58 # include <gnu-versions.h>
59 # if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
60 # define ELIDE_CODE
61 # endif
62 #endif
63
64 #ifndef ELIDE_CODE
65
66
67 /* This needs to come after some library #include
68 to get __GNU_LIBRARY__ defined. */
69 #ifdef __GNU_LIBRARY__
70 /* Don't include stdlib.h for non-GNU C libraries because some of them
71 contain conflicting prototypes for getopt. */
72 # include <stdlib.h>
73 # include <unistd.h>
74 #endif /* GNU C library. */
75
76 #ifdef VMS
77 # include <unixlib.h>
78 # if HAVE_STRING_H - 0
79 # include <string.h>
80 # endif
81 #endif
82
83 #ifndef _
84 /* This is for other GNU distributions with internationalized messages.
85 When compiling libc, the _ macro is predefined. */
86 # if (HAVE_LIBINTL_H && ENABLE_NLS) || defined _LIBC
87 # include <libintl.h>
88 # define _(msgid) gettext (msgid)
89 # else
90 # define _(msgid) (msgid)
91 # endif
92 #endif
93
94 /* This version of `getopt' appears to the caller like standard Unix `getopt'
95 but it behaves differently for the user, since it allows the user
96 to intersperse the options with the other arguments.
97
98 As `getopt' works, it permutes the elements of ARGV so that,
99 when it is done, all the options precede everything else. Thus
100 all application programs are extended to handle flexible argument order.
101
102 Setting the environment variable POSIXLY_CORRECT disables permutation.
103 Then the behavior is completely standard.
104
105 GNU application programs can use a third alternative mode in which
106 they can distinguish the relative order of options and other arguments. */
107
108 #include "getopt.h"
109
110 /* For communication from `getopt' to the caller.
111 When `getopt' finds an option that takes an argument,
112 the argument value is returned here.
113 Also, when `ordering' is RETURN_IN_ORDER,
114 each non-option ARGV-element is returned here. */
115
116 char *optarg = NULL;
117
118 /* Index in ARGV of the next element to be scanned.
119 This is used for communication to and from the caller
120 and for communication between successive calls to `getopt'.
121
122 On entry to `getopt', zero means this is the first call; initialize.
123
124 When `getopt' returns -1, this is the index of the first of the
125 non-option elements that the caller should itself scan.
126
127 Otherwise, `optind' communicates from one call to the next
128 how much of ARGV has been scanned so far. */
129
130 /* 1003.2 says this must be 1 before any call. */
131 int optind = 1;
132
133 /* Formerly, initialization of getopt depended on optind==0, which
134 causes problems with re-calling getopt as programs generally don't
135 know that. */
136
137 int __getopt_initialized = 0;
138
139 /* The next char to be scanned in the option-element
140 in which the last option character we returned was found.
141 This allows us to pick up the scan where we left off.
142
143 If this is zero, or a null string, it means resume the scan
144 by advancing to the next ARGV-element. */
145
146 static char *nextchar;
147
148 /* Callers store zero here to inhibit the error message
149 for unrecognized options. */
150
151 int opterr = 1;
152
153 /* Set to an option character which was unrecognized.
154 This must be initialized on some systems to avoid linking in the
155 system's own getopt implementation. */
156
157 int optopt = '?';
158
159 /* Describe how to deal with options that follow non-option ARGV-elements.
160
161 If the caller did not specify anything,
162 the default is REQUIRE_ORDER if the environment variable
163 POSIXLY_CORRECT is defined, PERMUTE otherwise.
164
165 REQUIRE_ORDER means don't recognize them as options;
166 stop option processing when the first non-option is seen.
167 This is what Unix does.
168 This mode of operation is selected by either setting the environment
169 variable POSIXLY_CORRECT, or using `+' as the first character
170 of the list of option characters.
171
172 PERMUTE is the default. We permute the contents of ARGV as we scan,
173 so that eventually all the non-options are at the end. This allows options
174 to be given in any order, even with programs that were not written to
175 expect this.
176
177 RETURN_IN_ORDER is an option available to programs that were written
178 to expect options and other ARGV-elements in any order and that care about
179 the ordering of the two. We describe each non-option ARGV-element
180 as if it were the argument of an option with character code 1.
181 Using `-' as the first character of the list of option characters
182 selects this mode of operation.
183
184 The special argument `--' forces an end of option-scanning regardless
185 of the value of `ordering'. In the case of RETURN_IN_ORDER, only
186 `--' can cause `getopt' to return -1 with `optind' != ARGC. */
187
188 static enum
189 {
190 REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
191 } ordering;
192
193 /* Value of POSIXLY_CORRECT environment variable. */
194 static char *posixly_correct;
195
196 #ifdef __GNU_LIBRARY__
197 /* We want to avoid inclusion of string.h with non-GNU libraries
198 because there are many ways it can cause trouble.
199 On some systems, it contains special magic macros that don't work
200 in GCC. */
201 # include <string.h>
202 # define my_index strchr
203 #else
204
205 # if HAVE_STRING_H
206 # include <string.h>
207 # else
208 # if HAVE_STRINGS_H
209 # include <strings.h>
210 # endif
211 # endif
212
213 /* Avoid depending on library functions or files
214 whose names are inconsistent. */
215
216 #if HAVE_STDLIB_H && HAVE_DECL_GETENV
217 # include <stdlib.h>
218 #elif !defined(getenv)
219 # ifdef __cplusplus
220 extern "C" {
221 # endif /* __cplusplus */
222 extern char *getenv (const char *);
223 # ifdef __cplusplus
224 }
225 # endif /* __cplusplus */
226 #endif
227
228 static char *
229 my_index (const char *str, int chr)
230 {
231 while (*str)
232 {
233 if (*str == chr)
234 return (char *) str;
235 str++;
236 }
237 return 0;
238 }
239
240 /* If using GCC, we can safely declare strlen this way.
241 If not using GCC, it is ok not to declare it. */
242 #ifdef __GNUC__
243 /* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h.
244 That was relevant to code that was here before. */
245 # if (!defined __STDC__ || !__STDC__) && !defined strlen
246 /* gcc with -traditional declares the built-in strlen to return int,
247 and has done so at least since version 2.4.5. -- rms. */
248 extern int strlen (const char *);
249 # endif /* not __STDC__ */
250 #endif /* __GNUC__ */
251
252 #endif /* not __GNU_LIBRARY__ */
253
254 /* Handle permutation of arguments. */
255
256 /* Describe the part of ARGV that contains non-options that have
257 been skipped. `first_nonopt' is the index in ARGV of the first of them;
258 `last_nonopt' is the index after the last of them. */
259
260 static int first_nonopt;
261 static int last_nonopt;
262
263 #ifdef _LIBC
264 /* Bash 2.0 gives us an environment variable containing flags
265 indicating ARGV elements that should not be considered arguments. */
266
267 /* Defined in getopt_init.c */
268 extern char *__getopt_nonoption_flags;
269
270 static int nonoption_flags_max_len;
271 static int nonoption_flags_len;
272
273 static int original_argc;
274 static char *const *original_argv;
275
276 /* Make sure the environment variable bash 2.0 puts in the environment
277 is valid for the getopt call we must make sure that the ARGV passed
278 to getopt is that one passed to the process. */
279 static void
280 __attribute__ ((unused))
281 store_args_and_env (int argc, char *const *argv)
282 {
283 /* XXX This is no good solution. We should rather copy the args so
284 that we can compare them later. But we must not use malloc(3). */
285 original_argc = argc;
286 original_argv = argv;
287 }
288 # ifdef text_set_element
289 text_set_element (__libc_subinit, store_args_and_env);
290 # endif /* text_set_element */
291
292 # define SWAP_FLAGS(ch1, ch2) \
293 if (nonoption_flags_len > 0) \
294 { \
295 char __tmp = __getopt_nonoption_flags[ch1]; \
296 __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \
297 __getopt_nonoption_flags[ch2] = __tmp; \
298 }
299 #else /* !_LIBC */
300 # define SWAP_FLAGS(ch1, ch2)
301 #endif /* _LIBC */
302
303 /* Exchange two adjacent subsequences of ARGV.
304 One subsequence is elements [first_nonopt,last_nonopt)
305 which contains all the non-options that have been skipped so far.
306 The other is elements [last_nonopt,optind), which contains all
307 the options processed since those non-options were skipped.
308
309 `first_nonopt' and `last_nonopt' are relocated so that they describe
310 the new indices of the non-options in ARGV after they are moved. */
311
312 #if defined __STDC__ && __STDC__
313 static void exchange (char **);
314 #endif
315
316 static void
317 exchange (char **argv)
318 {
319 int bottom = first_nonopt;
320 int middle = last_nonopt;
321 int top = optind;
322 char *tem;
323
324 /* Exchange the shorter segment with the far end of the longer segment.
325 That puts the shorter segment into the right place.
326 It leaves the longer segment in the right place overall,
327 but it consists of two parts that need to be swapped next. */
328
329 #ifdef _LIBC
330 /* First make sure the handling of the `__getopt_nonoption_flags'
331 string can work normally. Our top argument must be in the range
332 of the string. */
333 if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len)
334 {
335 /* We must extend the array. The user plays games with us and
336 presents new arguments. */
337 char *new_str = (char *) malloc (top + 1);
338 if (new_str == NULL)
339 nonoption_flags_len = nonoption_flags_max_len = 0;
340 else
341 {
342 memset (mempcpy (new_str, __getopt_nonoption_flags,
343 nonoption_flags_max_len),
344 '\0', top + 1 - nonoption_flags_max_len);
345 nonoption_flags_max_len = top + 1;
346 __getopt_nonoption_flags = new_str;
347 }
348 }
349 #endif
350
351 while (top > middle && middle > bottom)
352 {
353 if (top - middle > middle - bottom)
354 {
355 /* Bottom segment is the short one. */
356 int len = middle - bottom;
357 register int i;
358
359 /* Swap it with the top part of the top segment. */
360 for (i = 0; i < len; i++)
361 {
362 tem = argv[bottom + i];
363 argv[bottom + i] = argv[top - (middle - bottom) + i];
364 argv[top - (middle - bottom) + i] = tem;
365 SWAP_FLAGS (bottom + i, top - (middle - bottom) + i);
366 }
367 /* Exclude the moved bottom segment from further swapping. */
368 top -= len;
369 }
370 else
371 {
372 /* Top segment is the short one. */
373 int len = top - middle;
374 register int i;
375
376 /* Swap it with the bottom part of the bottom segment. */
377 for (i = 0; i < len; i++)
378 {
379 tem = argv[bottom + i];
380 argv[bottom + i] = argv[middle + i];
381 argv[middle + i] = tem;
382 SWAP_FLAGS (bottom + i, middle + i);
383 }
384 /* Exclude the moved top segment from further swapping. */
385 bottom += len;
386 }
387 }
388
389 /* Update records for the slots the non-options now occupy. */
390
391 first_nonopt += (optind - last_nonopt);
392 last_nonopt = optind;
393 }
394
395 /* Initialize the internal data when the first call is made. */
396
397 #if defined __STDC__ && __STDC__
398 static const char *_getopt_initialize (int, char *const *, const char *);
399 #endif
400 static const char *
401 _getopt_initialize (int argc ATTRIBUTE_UNUSED,
402 char *const *argv ATTRIBUTE_UNUSED,
403 const char *optstring)
404 {
405 /* Start processing options with ARGV-element 1 (since ARGV-element 0
406 is the program name); the sequence of previously skipped
407 non-option ARGV-elements is empty. */
408
409 first_nonopt = last_nonopt = optind;
410
411 nextchar = NULL;
412
413 posixly_correct = getenv ("POSIXLY_CORRECT");
414
415 /* Determine how to handle the ordering of options and nonoptions. */
416
417 if (optstring[0] == '-')
418 {
419 ordering = RETURN_IN_ORDER;
420 ++optstring;
421 }
422 else if (optstring[0] == '+')
423 {
424 ordering = REQUIRE_ORDER;
425 ++optstring;
426 }
427 else if (posixly_correct != NULL)
428 ordering = REQUIRE_ORDER;
429 else
430 ordering = PERMUTE;
431
432 #ifdef _LIBC
433 if (posixly_correct == NULL
434 && argc == original_argc && argv == original_argv)
435 {
436 if (nonoption_flags_max_len == 0)
437 {
438 if (__getopt_nonoption_flags == NULL
439 || __getopt_nonoption_flags[0] == '\0')
440 nonoption_flags_max_len = -1;
441 else
442 {
443 const char *orig_str = __getopt_nonoption_flags;
444 int len = nonoption_flags_max_len = strlen (orig_str);
445 if (nonoption_flags_max_len < argc)
446 nonoption_flags_max_len = argc;
447 __getopt_nonoption_flags =
448 (char *) malloc (nonoption_flags_max_len);
449 if (__getopt_nonoption_flags == NULL)
450 nonoption_flags_max_len = -1;
451 else
452 memset (mempcpy (__getopt_nonoption_flags, orig_str, len),
453 '\0', nonoption_flags_max_len - len);
454 }
455 }
456 nonoption_flags_len = nonoption_flags_max_len;
457 }
458 else
459 nonoption_flags_len = 0;
460 #endif
461
462 return optstring;
463 }
464
465 /* Scan elements of ARGV (whose length is ARGC) for option characters
466 given in OPTSTRING.
467
468 If an element of ARGV starts with '-', and is not exactly "-" or "--",
469 then it is an option element. The characters of this element
470 (aside from the initial '-') are option characters. If `getopt'
471 is called repeatedly, it returns successively each of the option characters
472 from each of the option elements.
473
474 If `getopt' finds another option character, it returns that character,
475 updating `optind' and `nextchar' so that the next call to `getopt' can
476 resume the scan with the following option character or ARGV-element.
477
478 If there are no more option characters, `getopt' returns -1.
479 Then `optind' is the index in ARGV of the first ARGV-element
480 that is not an option. (The ARGV-elements have been permuted
481 so that those that are not options now come last.)
482
483 OPTSTRING is a string containing the legitimate option characters.
484 If an option character is seen that is not listed in OPTSTRING,
485 return '?' after printing an error message. If you set `opterr' to
486 zero, the error message is suppressed but we still return '?'.
487
488 If a char in OPTSTRING is followed by a colon, that means it wants an arg,
489 so the following text in the same ARGV-element, or the text of the following
490 ARGV-element, is returned in `optarg'. Two colons mean an option that
491 wants an optional arg; if there is text in the current ARGV-element,
492 it is returned in `optarg', otherwise `optarg' is set to zero.
493
494 If OPTSTRING starts with `-' or `+', it requests different methods of
495 handling the non-option ARGV-elements.
496 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
497
498 Long-named options begin with `--' instead of `-'.
499 Their names may be abbreviated as long as the abbreviation is unique
500 or is an exact match for some defined option. If they have an
501 argument, it follows the option name in the same ARGV-element, separated
502 from the option name by a `=', or else the in next ARGV-element.
503 When `getopt' finds a long-named option, it returns 0 if that option's
504 `flag' field is nonzero, the value of the option's `val' field
505 if the `flag' field is zero.
506
507 The elements of ARGV aren't really const, because we permute them.
508 But we pretend they're const in the prototype to be compatible
509 with other systems.
510
511 LONGOPTS is a vector of `struct option' terminated by an
512 element containing a name which is zero.
513
514 LONGIND returns the index in LONGOPT of the long-named option found.
515 It is only valid when a long-named option has been found by the most
516 recent call.
517
518 If LONG_ONLY is nonzero, '-' as well as '--' can introduce
519 long-named options. */
520
521 int
522 _getopt_internal (int argc, char *const *argv, const char *optstring,
523 const struct option *longopts,
524 int *longind, int long_only)
525 {
526 optarg = NULL;
527
528 if (optind == 0 || !__getopt_initialized)
529 {
530 if (optind == 0)
531 optind = 1; /* Don't scan ARGV[0], the program name. */
532 optstring = _getopt_initialize (argc, argv, optstring);
533 __getopt_initialized = 1;
534 }
535
536 /* Test whether ARGV[optind] points to a non-option argument.
537 Either it does not have option syntax, or there is an environment flag
538 from the shell indicating it is not an option. The later information
539 is only used when the used in the GNU libc. */
540 #ifdef _LIBC
541 # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \
542 || (optind < nonoption_flags_len \
543 && __getopt_nonoption_flags[optind] == '1'))
544 #else
545 # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0')
546 #endif
547
548 if (nextchar == NULL || *nextchar == '\0')
549 {
550 /* Advance to the next ARGV-element. */
551
552 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been
553 moved back by the user (who may also have changed the arguments). */
554 if (last_nonopt > optind)
555 last_nonopt = optind;
556 if (first_nonopt > optind)
557 first_nonopt = optind;
558
559 if (ordering == PERMUTE)
560 {
561 /* If we have just processed some options following some non-options,
562 exchange them so that the options come first. */
563
564 if (first_nonopt != last_nonopt && last_nonopt != optind)
565 exchange ((char **) argv);
566 else if (last_nonopt != optind)
567 first_nonopt = optind;
568
569 /* Skip any additional non-options
570 and extend the range of non-options previously skipped. */
571
572 while (optind < argc && NONOPTION_P)
573 optind++;
574 last_nonopt = optind;
575 }
576
577 /* The special ARGV-element `--' means premature end of options.
578 Skip it like a null option,
579 then exchange with previous non-options as if it were an option,
580 then skip everything else like a non-option. */
581
582 if (optind != argc && !strcmp (argv[optind], "--"))
583 {
584 optind++;
585
586 if (first_nonopt != last_nonopt && last_nonopt != optind)
587 exchange ((char **) argv);
588 else if (first_nonopt == last_nonopt)
589 first_nonopt = optind;
590 last_nonopt = argc;
591
592 optind = argc;
593 }
594
595 /* If we have done all the ARGV-elements, stop the scan
596 and back over any non-options that we skipped and permuted. */
597
598 if (optind == argc)
599 {
600 /* Set the next-arg-index to point at the non-options
601 that we previously skipped, so the caller will digest them. */
602 if (first_nonopt != last_nonopt)
603 optind = first_nonopt;
604 return -1;
605 }
606
607 /* If we have come to a non-option and did not permute it,
608 either stop the scan or describe it to the caller and pass it by. */
609
610 if (NONOPTION_P)
611 {
612 if (ordering == REQUIRE_ORDER)
613 return -1;
614 optarg = argv[optind++];
615 return 1;
616 }
617
618 /* We have found another option-ARGV-element.
619 Skip the initial punctuation. */
620
621 nextchar = (argv[optind] + 1
622 + (longopts != NULL && argv[optind][1] == '-'));
623 }
624
625 /* Decode the current option-ARGV-element. */
626
627 /* Check whether the ARGV-element is a long option.
628
629 If long_only and the ARGV-element has the form "-f", where f is
630 a valid short option, don't consider it an abbreviated form of
631 a long option that starts with f. Otherwise there would be no
632 way to give the -f short option.
633
634 On the other hand, if there's a long option "fubar" and
635 the ARGV-element is "-fu", do consider that an abbreviation of
636 the long option, just like "--fu", and not "-f" with arg "u".
637
638 This distinction seems to be the most useful approach. */
639
640 if (longopts != NULL
641 && (argv[optind][1] == '-'
642 || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1])))))
643 {
644 char *nameend;
645 const struct option *p;
646 const struct option *pfound = NULL;
647 int exact = 0;
648 int ambig = 0;
649 int indfound = -1;
650 int option_index;
651
652 for (nameend = nextchar; *nameend && *nameend != '='; nameend++)
653 /* Do nothing. */ ;
654
655 /* Test all long options for either exact match
656 or abbreviated matches. */
657 for (p = longopts, option_index = 0; p->name; p++, option_index++)
658 if (!strncmp (p->name, nextchar, nameend - nextchar))
659 {
660 if ((unsigned int) (nameend - nextchar)
661 == (unsigned int) strlen (p->name))
662 {
663 /* Exact match found. */
664 pfound = p;
665 indfound = option_index;
666 exact = 1;
667 break;
668 }
669 else if (pfound == NULL)
670 {
671 /* First nonexact match found. */
672 pfound = p;
673 indfound = option_index;
674 }
675 else
676 /* Second or later nonexact match found. */
677 ambig = 1;
678 }
679
680 if (ambig && !exact)
681 {
682 if (opterr)
683 fprintf (stderr, _("%s: option `%s' is ambiguous\n"),
684 argv[0], argv[optind]);
685 nextchar += strlen (nextchar);
686 optind++;
687 optopt = 0;
688 return '?';
689 }
690
691 if (pfound != NULL)
692 {
693 option_index = indfound;
694 optind++;
695 if (*nameend)
696 {
697 /* Don't test has_arg with >, because some C compilers don't
698 allow it to be used on enums. */
699 if (pfound->has_arg)
700 optarg = nameend + 1;
701 else
702 {
703 if (opterr)
704 {
705 if (argv[optind - 1][1] == '-')
706 /* --option */
707 fprintf (stderr,
708 _("%s: option `--%s' doesn't allow an argument\n"),
709 argv[0], pfound->name);
710 else
711 /* +option or -option */
712 fprintf (stderr,
713 _("%s: option `%c%s' doesn't allow an argument\n"),
714 argv[0], argv[optind - 1][0], pfound->name);
715
716 nextchar += strlen (nextchar);
717
718 optopt = pfound->val;
719 return '?';
720 }
721 }
722 }
723 else if (pfound->has_arg == 1)
724 {
725 if (optind < argc)
726 optarg = argv[optind++];
727 else
728 {
729 if (opterr)
730 fprintf (stderr,
731 _("%s: option `%s' requires an argument\n"),
732 argv[0], argv[optind - 1]);
733 nextchar += strlen (nextchar);
734 optopt = pfound->val;
735 return optstring[0] == ':' ? ':' : '?';
736 }
737 }
738 nextchar += strlen (nextchar);
739 if (longind != NULL)
740 *longind = option_index;
741 if (pfound->flag)
742 {
743 *(pfound->flag) = pfound->val;
744 return 0;
745 }
746 return pfound->val;
747 }
748
749 /* Can't find it as a long option. If this is not getopt_long_only,
750 or the option starts with '--' or is not a valid short
751 option, then it's an error.
752 Otherwise interpret it as a short option. */
753 if (!long_only || argv[optind][1] == '-'
754 || my_index (optstring, *nextchar) == NULL)
755 {
756 if (opterr)
757 {
758 if (argv[optind][1] == '-')
759 /* --option */
760 fprintf (stderr, _("%s: unrecognized option `--%s'\n"),
761 argv[0], nextchar);
762 else
763 /* +option or -option */
764 fprintf (stderr, _("%s: unrecognized option `%c%s'\n"),
765 argv[0], argv[optind][0], nextchar);
766 }
767 nextchar = (char *) "";
768 optind++;
769 optopt = 0;
770 return '?';
771 }
772 }
773
774 /* Look at and handle the next short option-character. */
775
776 {
777 char c = *nextchar++;
778 char *temp = my_index (optstring, c);
779
780 /* Increment `optind' when we start to process its last character. */
781 if (*nextchar == '\0')
782 ++optind;
783
784 if (temp == NULL || c == ':')
785 {
786 if (opterr)
787 {
788 if (posixly_correct)
789 /* 1003.2 specifies the format of this message. */
790 fprintf (stderr, _("%s: illegal option -- %c\n"),
791 argv[0], c);
792 else
793 fprintf (stderr, _("%s: invalid option -- %c\n"),
794 argv[0], c);
795 }
796 optopt = c;
797 return '?';
798 }
799 /* Convenience. Treat POSIX -W foo same as long option --foo */
800 if (temp[0] == 'W' && temp[1] == ';')
801 {
802 char *nameend;
803 const struct option *p;
804 const struct option *pfound = NULL;
805 int exact = 0;
806 int ambig = 0;
807 int indfound = 0;
808 int option_index;
809
810 /* This is an option that requires an argument. */
811 if (*nextchar != '\0')
812 {
813 optarg = nextchar;
814 /* If we end this ARGV-element by taking the rest as an arg,
815 we must advance to the next element now. */
816 optind++;
817 }
818 else if (optind == argc)
819 {
820 if (opterr)
821 {
822 /* 1003.2 specifies the format of this message. */
823 fprintf (stderr, _("%s: option requires an argument -- %c\n"),
824 argv[0], c);
825 }
826 optopt = c;
827 if (optstring[0] == ':')
828 c = ':';
829 else
830 c = '?';
831 return c;
832 }
833 else
834 /* We already incremented `optind' once;
835 increment it again when taking next ARGV-elt as argument. */
836 optarg = argv[optind++];
837
838 /* optarg is now the argument, see if it's in the
839 table of longopts. */
840
841 for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++)
842 /* Do nothing. */ ;
843
844 /* Test all long options for either exact match
845 or abbreviated matches. */
846 for (p = longopts, option_index = 0; p->name; p++, option_index++)
847 if (!strncmp (p->name, nextchar, nameend - nextchar))
848 {
849 if ((unsigned int) (nameend - nextchar) == strlen (p->name))
850 {
851 /* Exact match found. */
852 pfound = p;
853 indfound = option_index;
854 exact = 1;
855 break;
856 }
857 else if (pfound == NULL)
858 {
859 /* First nonexact match found. */
860 pfound = p;
861 indfound = option_index;
862 }
863 else
864 /* Second or later nonexact match found. */
865 ambig = 1;
866 }
867 if (ambig && !exact)
868 {
869 if (opterr)
870 fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"),
871 argv[0], argv[optind]);
872 nextchar += strlen (nextchar);
873 optind++;
874 return '?';
875 }
876 if (pfound != NULL)
877 {
878 option_index = indfound;
879 if (*nameend)
880 {
881 /* Don't test has_arg with >, because some C compilers don't
882 allow it to be used on enums. */
883 if (pfound->has_arg)
884 optarg = nameend + 1;
885 else
886 {
887 if (opterr)
888 fprintf (stderr, _("\
889 %s: option `-W %s' doesn't allow an argument\n"),
890 argv[0], pfound->name);
891
892 nextchar += strlen (nextchar);
893 return '?';
894 }
895 }
896 else if (pfound->has_arg == 1)
897 {
898 if (optind < argc)
899 optarg = argv[optind++];
900 else
901 {
902 if (opterr)
903 fprintf (stderr,
904 _("%s: option `%s' requires an argument\n"),
905 argv[0], argv[optind - 1]);
906 nextchar += strlen (nextchar);
907 return optstring[0] == ':' ? ':' : '?';
908 }
909 }
910 nextchar += strlen (nextchar);
911 if (longind != NULL)
912 *longind = option_index;
913 if (pfound->flag)
914 {
915 *(pfound->flag) = pfound->val;
916 return 0;
917 }
918 return pfound->val;
919 }
920 nextchar = NULL;
921 return 'W'; /* Let the application handle it. */
922 }
923 if (temp[1] == ':')
924 {
925 if (temp[2] == ':')
926 {
927 /* This is an option that accepts an argument optionally. */
928 if (*nextchar != '\0')
929 {
930 optarg = nextchar;
931 optind++;
932 }
933 else
934 optarg = NULL;
935 nextchar = NULL;
936 }
937 else
938 {
939 /* This is an option that requires an argument. */
940 if (*nextchar != '\0')
941 {
942 optarg = nextchar;
943 /* If we end this ARGV-element by taking the rest as an arg,
944 we must advance to the next element now. */
945 optind++;
946 }
947 else if (optind == argc)
948 {
949 if (opterr)
950 {
951 /* 1003.2 specifies the format of this message. */
952 fprintf (stderr,
953 _("%s: option requires an argument -- %c\n"),
954 argv[0], c);
955 }
956 optopt = c;
957 if (optstring[0] == ':')
958 c = ':';
959 else
960 c = '?';
961 }
962 else
963 /* We already incremented `optind' once;
964 increment it again when taking next ARGV-elt as argument. */
965 optarg = argv[optind++];
966 nextchar = NULL;
967 }
968 }
969 return c;
970 }
971 }
972
973 int
974 getopt (int argc, char *const *argv, 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
989 int
990 main (int argc, char **argv)
991 {
992 int c;
993 int digit_optind = 0;
994
995 while (1)
996 {
997 int this_option_optind = optind ? optind : 1;
998
999 c = getopt (argc, argv, "abc:d:0123456789");
1000 if (c == -1)
1001 break;
1002
1003 switch (c)
1004 {
1005 case '0':
1006 case '1':
1007 case '2':
1008 case '3':
1009 case '4':
1010 case '5':
1011 case '6':
1012 case '7':
1013 case '8':
1014 case '9':
1015 if (digit_optind != 0 && digit_optind != this_option_optind)
1016 printf ("digits occur in two different argv-elements.\n");
1017 digit_optind = this_option_optind;
1018 printf ("option %c\n", c);
1019 break;
1020
1021 case 'a':
1022 printf ("option a\n");
1023 break;
1024
1025 case 'b':
1026 printf ("option b\n");
1027 break;
1028
1029 case 'c':
1030 printf ("option c with value `%s'\n", optarg);
1031 break;
1032
1033 case '?':
1034 break;
1035
1036 default:
1037 printf ("?? getopt returned character code 0%o ??\n", c);
1038 }
1039 }
1040
1041 if (optind < argc)
1042 {
1043 printf ("non-option ARGV-elements: ");
1044 while (optind < argc)
1045 printf ("%s ", argv[optind++]);
1046 printf ("\n");
1047 }
1048
1049 exit (0);
1050 }
1051
1052 #endif /* TEST */