1 /* Note: This file has been created from getopt.c and getopt1.c in order
2 to have only one file called the same as the function it implements
3 (getopt_long) by David Necas <yeti@physics.muni.cz>. During that, some
4 stuff not needed when building standalone getopt has been removed. No
5 other changes have been made. */
6 /* Getopt for GNU.
7 NOTE: getopt is now part of the C library, so if you don't know what
8 "Keep this file name-space clean" means, talk to drepper@gnu.org
9 before changing it!
10
11 Copyright (C) 1987, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 2000
12 Free Software Foundation, Inc.
13
14 The GNU C Library is free software; you can redistribute it and/or
15 modify it under the terms of the GNU Library General Public License as
16 published by the Free Software Foundation; either version 2 of the
17 License, or (at your option) any later version.
18
19 The GNU C Library is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22 Library General Public License for more details.
23
24 You should have received a copy of the GNU Library General Public
25 License along with the GNU C Library; see the file COPYING.LIB. If not,
26 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
27 Boston, MA 02111-1307, USA. */
28
29 /* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>.
30 Ditto for AIX 3.2 and <stdlib.h>. */
31 #ifndef _NO_PROTO
32 # define _NO_PROTO
33 #endif
34
35 #ifdef HAVE_CONFIG_H
36 # include "config.h"
37 #endif /* HAVE_CONFIG_H */
38
39 #ifndef NULL
40 #define NULL 0
41 #endif
42
43 #if !defined __STDC__ || !__STDC__
44 /* This is a separate conditional since some stdc systems
45 reject `defined (const)'. */
46 # ifndef const
47 # define const
48 # endif
49 #endif
50
51 #include <stdio.h>
52
53 /* This needs to come after some library #include
54 to get __GNU_LIBRARY__ defined. */
55 #ifdef __GNU_LIBRARY__
56 /* Don't include stdlib.h for non-GNU C libraries because some of them
57 contain conflicting prototypes for getopt. */
58 # include <stdlib.h>
59 # include <unistd.h>
60 #endif /* GNU C library. */
61
62 #ifdef VMS
63 # include <unixlib.h>
64 # if HAVE_STRING_H - 0
65 # include <string.h>
66 # endif
67 #endif
68
69 #ifndef _
70 /* This is for other GNU distributions with internationalized messages. */
71 # if defined HAVE_LIBINTL_H
72 # include <libintl.h>
73 # ifndef _
74 # define _(msgid) gettext (msgid)
75 # endif
76 # else
77 # define _(msgid) (msgid)
78 # endif
79 #endif
80
81 /* This version of `getopt' appears to the caller like standard Unix `getopt'
82 but it behaves differently for the user, since it allows the user
83 to intersperse the options with the other arguments.
84
85 As `getopt' works, it permutes the elements of ARGV so that,
86 when it is done, all the options precede everything else. Thus
87 all application programs are extended to handle flexible argument order.
88
89 Setting the environment variable POSIXLY_CORRECT disables permutation.
90 Then the behavior is completely standard.
91
92 GNU application programs can use a third alternative mode in which
93 they can distinguish the relative order of options and other arguments. */
94
95 #include "getopt.h"
96
97 /* For communication from `getopt' to the caller.
98 When `getopt' finds an option that takes an argument,
99 the argument value is returned here.
100 Also, when `ordering' is RETURN_IN_ORDER,
101 each non-option ARGV-element is returned here. */
102
103 char *optarg;
104
105 /* Index in ARGV of the next element to be scanned.
106 This is used for communication to and from the caller
107 and for communication between successive calls to `getopt'.
108
109 On entry to `getopt', zero means this is the first call; initialize.
110
111 When `getopt' returns -1, this is the index of the first of the
112 non-option elements that the caller should itself scan.
113
114 Otherwise, `optind' communicates from one call to the next
115 how much of ARGV has been scanned so far. */
116
117 /* 1003.2 says this must be 1 before any call. */
118 int optind = 1;
119
120 /* Formerly, initialization of getopt depended on optind==0, which
121 causes problems with re-calling getopt as programs generally don't
122 know that. */
123
124 int __getopt_initialized;
125
126 /* The next char to be scanned in the option-element
127 in which the last option character we returned was found.
128 This allows us to pick up the scan where we left off.
129
130 If this is zero, or a null string, it means resume the scan
131 by advancing to the next ARGV-element. */
132
133 static char *nextchar;
134
135 /* Callers store zero here to inhibit the error message
136 for unrecognized options. */
137
138 int opterr = 1;
139
140 /* Set to an option character which was unrecognized.
141 This must be initialized on some systems to avoid linking in the
142 system's own getopt implementation. */
143
144 int optopt = '?';
145
146 /* Describe how to deal with options that follow non-option ARGV-elements.
147
148 If the caller did not specify anything,
149 the default is REQUIRE_ORDER if the environment variable
150 POSIXLY_CORRECT is defined, PERMUTE otherwise.
151
152 REQUIRE_ORDER means don't recognize them as options;
153 stop option processing when the first non-option is seen.
154 This is what Unix does.
155 This mode of operation is selected by either setting the environment
156 variable POSIXLY_CORRECT, or using `+' as the first character
157 of the list of option characters.
158
159 PERMUTE is the default. We permute the contents of ARGV as we scan,
160 so that eventually all the non-options are at the end. This allows options
161 to be given in any order, even with programs that were not written to
162 expect this.
163
164 RETURN_IN_ORDER is an option available to programs that were written
165 to expect options and other ARGV-elements in any order and that care about
166 the ordering of the two. We describe each non-option ARGV-element
167 as if it were the argument of an option with character code 1.
168 Using `-' as the first character of the list of option characters
169 selects this mode of operation.
170
171 The special argument `--' forces an end of option-scanning regardless
172 of the value of `ordering'. In the case of RETURN_IN_ORDER, only
173 `--' can cause `getopt' to return -1 with `optind' != ARGC. */
174
175 static enum
176 {
177 REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
178 } ordering;
179
180 /* Value of POSIXLY_CORRECT environment variable. */
181 static char *posixly_correct;
182
183 #ifdef __GNU_LIBRARY__
184 /* We want to avoid inclusion of string.h with non-GNU libraries
185 because there are many ways it can cause trouble.
186 On some systems, it contains special magic macros that don't work
187 in GCC. */
188 # include <string.h>
189 # define my_index strchr
190 #else
191
192 # if HAVE_STRING_H
193 # include <string.h>
194 # else
195 # include <strings.h>
196 # endif
197
198 /* Avoid depending on library functions or files
199 whose names are inconsistent. */
200
201 #ifndef getenv
202 extern char *getenv ();
203 #endif
204
205 static char *
my_index(str,chr)206 my_index (str, chr)
207 const char *str;
208 int chr;
209 {
210 while (*str)
211 {
212 if (*str == chr)
213 return (char *) str;
214 str++;
215 }
216 return 0;
217 }
218
219 /* If using GCC, we can safely declare strlen this way.
220 If not using GCC, it is ok not to declare it. */
221 #ifdef __GNUC__
222 /* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h.
223 That was relevant to code that was here before. */
224 # if (!defined __STDC__ || !__STDC__) && !defined strlen
225 /* gcc with -traditional declares the built-in strlen to return int,
226 and has done so at least since version 2.4.5. -- rms. */
227 extern int strlen (const char *);
228 # endif /* not __STDC__ */
229 #endif /* __GNUC__ */
230
231 #endif /* not __GNU_LIBRARY__ */
232
233 /* Handle permutation of arguments. */
234
235 /* Describe the part of ARGV that contains non-options that have
236 been skipped. `first_nonopt' is the index in ARGV of the first of them;
237 `last_nonopt' is the index after the last of them. */
238
239 static int first_nonopt;
240 static int last_nonopt;
241
242 #define SWAP_FLAGS(ch1, ch2)
243
244 /* Exchange two adjacent subsequences of ARGV.
245 One subsequence is elements [first_nonopt,last_nonopt)
246 which contains all the non-options that have been skipped so far.
247 The other is elements [last_nonopt,optind), which contains all
248 the options processed since those non-options were skipped.
249
250 `first_nonopt' and `last_nonopt' are relocated so that they describe
251 the new indices of the non-options in ARGV after they are moved. */
252
253 #if defined __STDC__ && __STDC__
254 static void exchange (char **);
255 #endif
256
257 static void
exchange(argv)258 exchange (argv)
259 char **argv;
260 {
261 int bottom = first_nonopt;
262 int middle = last_nonopt;
263 int top = optind;
264 char *tem;
265
266 /* Exchange the shorter segment with the far end of the longer segment.
267 That puts the shorter segment into the right place.
268 It leaves the longer segment in the right place overall,
269 but it consists of two parts that need to be swapped next. */
270
271 while (top > middle && middle > bottom)
272 {
273 if (top - middle > middle - bottom)
274 {
275 /* Bottom segment is the short one. */
276 int len = middle - bottom;
277 register int i;
278
279 /* Swap it with the top part of the top segment. */
280 for (i = 0; i < len; i++)
281 {
282 tem = argv[bottom + i];
283 argv[bottom + i] = argv[top - (middle - bottom) + i];
284 argv[top - (middle - bottom) + i] = tem;
285 SWAP_FLAGS (bottom + i, top - (middle - bottom) + i);
286 }
287 /* Exclude the moved bottom segment from further swapping. */
288 top -= len;
289 }
290 else
291 {
292 /* Top segment is the short one. */
293 int len = top - middle;
294 register int i;
295
296 /* Swap it with the bottom part of the bottom segment. */
297 for (i = 0; i < len; i++)
298 {
299 tem = argv[bottom + i];
300 argv[bottom + i] = argv[middle + i];
301 argv[middle + i] = tem;
302 SWAP_FLAGS (bottom + i, middle + i);
303 }
304 /* Exclude the moved top segment from further swapping. */
305 bottom += len;
306 }
307 }
308
309 /* Update records for the slots the non-options now occupy. */
310
311 first_nonopt += (optind - last_nonopt);
312 last_nonopt = optind;
313 }
314
315 /* Initialize the internal data when the first call is made. */
316
317 #if defined __STDC__ && __STDC__
318 static const char *_getopt_initialize (int, char *const *, const char *);
319 #endif
320 static const char *
_getopt_initialize(argc,argv,optstring)321 _getopt_initialize (argc, argv, optstring)
322 int argc;
323 char *const *argv;
324 const char *optstring;
325 {
326 /* Start processing options with ARGV-element 1 (since ARGV-element 0
327 is the program name); the sequence of previously skipped
328 non-option ARGV-elements is empty. */
329
330 first_nonopt = last_nonopt = optind;
331
332 nextchar = NULL;
333
334 posixly_correct = getenv ("POSIXLY_CORRECT");
335
336 /* Determine how to handle the ordering of options and nonoptions. */
337
338 if (optstring[0] == '-')
339 {
340 ordering = RETURN_IN_ORDER;
341 ++optstring;
342 }
343 else if (optstring[0] == '+')
344 {
345 ordering = REQUIRE_ORDER;
346 ++optstring;
347 }
348 else if (posixly_correct != NULL)
349 ordering = REQUIRE_ORDER;
350 else
351 ordering = PERMUTE;
352
353 return optstring;
354 }
355
356 /* Scan elements of ARGV (whose length is ARGC) for option characters
357 given in OPTSTRING.
358
359 If an element of ARGV starts with '-', and is not exactly "-" or "--",
360 then it is an option element. The characters of this element
361 (aside from the initial '-') are option characters. If `getopt'
362 is called repeatedly, it returns successively each of the option characters
363 from each of the option elements.
364
365 If `getopt' finds another option character, it returns that character,
366 updating `optind' and `nextchar' so that the next call to `getopt' can
367 resume the scan with the following option character or ARGV-element.
368
369 If there are no more option characters, `getopt' returns -1.
370 Then `optind' is the index in ARGV of the first ARGV-element
371 that is not an option. (The ARGV-elements have been permuted
372 so that those that are not options now come last.)
373
374 OPTSTRING is a string containing the legitimate option characters.
375 If an option character is seen that is not listed in OPTSTRING,
376 return '?' after printing an error message. If you set `opterr' to
377 zero, the error message is suppressed but we still return '?'.
378
379 If a char in OPTSTRING is followed by a colon, that means it wants an arg,
380 so the following text in the same ARGV-element, or the text of the following
381 ARGV-element, is returned in `optarg'. Two colons mean an option that
382 wants an optional arg; if there is text in the current ARGV-element,
383 it is returned in `optarg', otherwise `optarg' is set to zero.
384
385 If OPTSTRING starts with `-' or `+', it requests different methods of
386 handling the non-option ARGV-elements.
387 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
388
389 Long-named options begin with `--' instead of `-'.
390 Their names may be abbreviated as long as the abbreviation is unique
391 or is an exact match for some defined option. If they have an
392 argument, it follows the option name in the same ARGV-element, separated
393 from the option name by a `=', or else the in next ARGV-element.
394 When `getopt' finds a long-named option, it returns 0 if that option's
395 `flag' field is nonzero, the value of the option's `val' field
396 if the `flag' field is zero.
397
398 The elements of ARGV aren't really const, because we permute them.
399 But we pretend they're const in the prototype to be compatible
400 with other systems.
401
402 LONGOPTS is a vector of `struct option' terminated by an
403 element containing a name which is zero.
404
405 LONGIND returns the index in LONGOPT of the long-named option found.
406 It is only valid when a long-named option has been found by the most
407 recent call.
408
409 If LONG_ONLY is nonzero, '-' as well as '--' can introduce
410 long-named options. */
411
412 int
_getopt_internal(argc,argv,optstring,longopts,longind,long_only)413 _getopt_internal (argc, argv, optstring, longopts, longind, long_only)
414 int argc;
415 char *const *argv;
416 const char *optstring;
417 const struct option *longopts;
418 int *longind;
419 int long_only;
420 {
421 int print_errors = opterr;
422 if (optstring[0] == ':')
423 print_errors = 0;
424
425 if (argc < 1)
426 return -1;
427
428 optarg = NULL;
429
430 if (optind == 0 || !__getopt_initialized)
431 {
432 if (optind == 0)
433 optind = 1; /* Don't scan ARGV[0], the program name. */
434 optstring = _getopt_initialize (argc, argv, optstring);
435 __getopt_initialized = 1;
436 }
437
438 /* Test whether ARGV[optind] points to a non-option argument.
439 Either it does not have option syntax, or there is an environment flag
440 from the shell indicating it is not an option. The later information
441 is only used when the used in the GNU libc. */
442 #define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0')
443
444 if (nextchar == NULL || *nextchar == '\0')
445 {
446 /* Advance to the next ARGV-element. */
447
448 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been
449 moved back by the user (who may also have changed the arguments). */
450 if (last_nonopt > optind)
451 last_nonopt = optind;
452 if (first_nonopt > optind)
453 first_nonopt = optind;
454
455 if (ordering == PERMUTE)
456 {
457 /* If we have just processed some options following some non-options,
458 exchange them so that the options come first. */
459
460 if (first_nonopt != last_nonopt && last_nonopt != optind)
461 exchange ((char **) argv);
462 else if (last_nonopt != optind)
463 first_nonopt = optind;
464
465 /* Skip any additional non-options
466 and extend the range of non-options previously skipped. */
467
468 while (optind < argc && NONOPTION_P)
469 optind++;
470 last_nonopt = optind;
471 }
472
473 /* The special ARGV-element `--' means premature end of options.
474 Skip it like a null option,
475 then exchange with previous non-options as if it were an option,
476 then skip everything else like a non-option. */
477
478 if (optind != argc && !strcmp (argv[optind], "--"))
479 {
480 optind++;
481
482 if (first_nonopt != last_nonopt && last_nonopt != optind)
483 exchange ((char **) argv);
484 else if (first_nonopt == last_nonopt)
485 first_nonopt = optind;
486 last_nonopt = argc;
487
488 optind = argc;
489 }
490
491 /* If we have done all the ARGV-elements, stop the scan
492 and back over any non-options that we skipped and permuted. */
493
494 if (optind == argc)
495 {
496 /* Set the next-arg-index to point at the non-options
497 that we previously skipped, so the caller will digest them. */
498 if (first_nonopt != last_nonopt)
499 optind = first_nonopt;
500 return -1;
501 }
502
503 /* If we have come to a non-option and did not permute it,
504 either stop the scan or describe it to the caller and pass it by. */
505
506 if (NONOPTION_P)
507 {
508 if (ordering == REQUIRE_ORDER)
509 return -1;
510 optarg = argv[optind++];
511 return 1;
512 }
513
514 /* We have found another option-ARGV-element.
515 Skip the initial punctuation. */
516
517 nextchar = (argv[optind] + 1
518 + (longopts != NULL && argv[optind][1] == '-'));
519 }
520
521 /* Decode the current option-ARGV-element. */
522
523 /* Check whether the ARGV-element is a long option.
524
525 If long_only and the ARGV-element has the form "-f", where f is
526 a valid short option, don't consider it an abbreviated form of
527 a long option that starts with f. Otherwise there would be no
528 way to give the -f short option.
529
530 On the other hand, if there's a long option "fubar" and
531 the ARGV-element is "-fu", do consider that an abbreviation of
532 the long option, just like "--fu", and not "-f" with arg "u".
533
534 This distinction seems to be the most useful approach. */
535
536 if (longopts != NULL
537 && (argv[optind][1] == '-'
538 || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1])))))
539 {
540 char *nameend;
541 const struct option *p;
542 const struct option *pfound = NULL;
543 int exact = 0;
544 int ambig = 0;
545 int indfound = -1;
546 int option_index;
547
548 for (nameend = nextchar; *nameend && *nameend != '='; nameend++)
549 /* Do nothing. */ ;
550
551 /* Test all long options for either exact match
552 or abbreviated matches. */
553 for (p = longopts, option_index = 0; p->name; p++, option_index++)
554 if (!strncmp (p->name, nextchar, nameend - nextchar))
555 {
556 if ((unsigned int) (nameend - nextchar)
557 == (unsigned int) strlen (p->name))
558 {
559 /* Exact match found. */
560 pfound = p;
561 indfound = option_index;
562 exact = 1;
563 break;
564 }
565 else if (pfound == NULL)
566 {
567 /* First nonexact match found. */
568 pfound = p;
569 indfound = option_index;
570 }
571 else if (long_only
572 || pfound->has_arg != p->has_arg
573 || pfound->flag != p->flag
574 || pfound->val != p->val)
575 /* Second or later nonexact match found. */
576 ambig = 1;
577 }
578
579 if (ambig && !exact)
580 {
581 if (print_errors)
582 fprintf (stderr, _("%s: option `%s' is ambiguous\n"),
583 argv[0], argv[optind]);
584 nextchar += strlen (nextchar);
585 optind++;
586 optopt = 0;
587 return '?';
588 }
589
590 if (pfound != NULL)
591 {
592 option_index = indfound;
593 optind++;
594 if (*nameend)
595 {
596 /* Don't test has_arg with >, because some C compilers don't
597 allow it to be used on enums. */
598 if (pfound->has_arg)
599 optarg = nameend + 1;
600 else
601 {
602 if (print_errors)
603 {
604 if (argv[optind - 1][1] == '-')
605 /* --option */
606 fprintf (stderr,
607 _("%s: option `--%s' doesn't allow an argument\n"),
608 argv[0], pfound->name);
609 else
610 /* +option or -option */
611 fprintf (stderr,
612 _("%s: option `%c%s' doesn't allow an argument\n"),
613 argv[0], argv[optind - 1][0], pfound->name);
614 }
615
616 nextchar += strlen (nextchar);
617
618 optopt = pfound->val;
619 return '?';
620 }
621 }
622 else if (pfound->has_arg == 1)
623 {
624 if (optind < argc)
625 optarg = argv[optind++];
626 else
627 {
628 if (print_errors)
629 fprintf (stderr,
630 _("%s: option `%s' requires an argument\n"),
631 argv[0], argv[optind - 1]);
632 nextchar += strlen (nextchar);
633 optopt = pfound->val;
634 return optstring[0] == ':' ? ':' : '?';
635 }
636 }
637 nextchar += strlen (nextchar);
638 if (longind != NULL)
639 *longind = option_index;
640 if (pfound->flag)
641 {
642 *(pfound->flag) = pfound->val;
643 return 0;
644 }
645 return pfound->val;
646 }
647
648 /* Can't find it as a long option. If this is not getopt_long_only,
649 or the option starts with '--' or is not a valid short
650 option, then it's an error.
651 Otherwise interpret it as a short option. */
652 if (!long_only || argv[optind][1] == '-'
653 || my_index (optstring, *nextchar) == NULL)
654 {
655 if (print_errors)
656 {
657 if (argv[optind][1] == '-')
658 /* --option */
659 fprintf (stderr, _("%s: unrecognized option `--%s'\n"),
660 argv[0], nextchar);
661 else
662 /* +option or -option */
663 fprintf (stderr, _("%s: unrecognized option `%c%s'\n"),
664 argv[0], argv[optind][0], nextchar);
665 }
666 nextchar = (char *) "";
667 optind++;
668 optopt = 0;
669 return '?';
670 }
671 }
672
673 /* Look at and handle the next short option-character. */
674
675 {
676 char c = *nextchar++;
677 char *temp = my_index (optstring, c);
678
679 /* Increment `optind' when we start to process its last character. */
680 if (*nextchar == '\0')
681 ++optind;
682
683 if (temp == NULL || c == ':')
684 {
685 if (print_errors)
686 {
687 if (posixly_correct)
688 /* 1003.2 specifies the format of this message. */
689 fprintf (stderr, _("%s: illegal option -- %c\n"),
690 argv[0], c);
691 else
692 fprintf (stderr, _("%s: invalid option -- %c\n"),
693 argv[0], c);
694 }
695 optopt = c;
696 return '?';
697 }
698 /* Convenience. Treat POSIX -W foo same as long option --foo */
699 if (temp[0] == 'W' && temp[1] == ';')
700 {
701 char *nameend;
702 const struct option *p;
703 const struct option *pfound = NULL;
704 int exact = 0;
705 int ambig = 0;
706 int indfound = 0;
707 int option_index;
708
709 /* This is an option that requires an argument. */
710 if (*nextchar != '\0')
711 {
712 optarg = nextchar;
713 /* If we end this ARGV-element by taking the rest as an arg,
714 we must advance to the next element now. */
715 optind++;
716 }
717 else if (optind == argc)
718 {
719 if (print_errors)
720 {
721 /* 1003.2 specifies the format of this message. */
722 fprintf (stderr, _("%s: option requires an argument -- %c\n"),
723 argv[0], c);
724 }
725 optopt = c;
726 if (optstring[0] == ':')
727 c = ':';
728 else
729 c = '?';
730 return c;
731 }
732 else
733 /* We already incremented `optind' once;
734 increment it again when taking next ARGV-elt as argument. */
735 optarg = argv[optind++];
736
737 /* optarg is now the argument, see if it's in the
738 table of longopts. */
739
740 for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++)
741 /* Do nothing. */ ;
742
743 /* Test all long options for either exact match
744 or abbreviated matches. */
745 for (p = longopts, option_index = 0; p->name; p++, option_index++)
746 if (!strncmp (p->name, nextchar, nameend - nextchar))
747 {
748 if ((unsigned int) (nameend - nextchar) == strlen (p->name))
749 {
750 /* Exact match found. */
751 pfound = p;
752 indfound = option_index;
753 exact = 1;
754 break;
755 }
756 else if (pfound == NULL)
757 {
758 /* First nonexact match found. */
759 pfound = p;
760 indfound = option_index;
761 }
762 else
763 /* Second or later nonexact match found. */
764 ambig = 1;
765 }
766 if (ambig && !exact)
767 {
768 if (print_errors)
769 fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"),
770 argv[0], argv[optind]);
771 nextchar += strlen (nextchar);
772 optind++;
773 return '?';
774 }
775 if (pfound != NULL)
776 {
777 option_index = indfound;
778 if (*nameend)
779 {
780 /* Don't test has_arg with >, because some C compilers don't
781 allow it to be used on enums. */
782 if (pfound->has_arg)
783 optarg = nameend + 1;
784 else
785 {
786 if (print_errors)
787 fprintf (stderr, _("\
788 %s: option `-W %s' doesn't allow an argument\n"),
789 argv[0], pfound->name);
790
791 nextchar += strlen (nextchar);
792 return '?';
793 }
794 }
795 else if (pfound->has_arg == 1)
796 {
797 if (optind < argc)
798 optarg = argv[optind++];
799 else
800 {
801 if (print_errors)
802 fprintf (stderr,
803 _("%s: option `%s' requires an argument\n"),
804 argv[0], argv[optind - 1]);
805 nextchar += strlen (nextchar);
806 return optstring[0] == ':' ? ':' : '?';
807 }
808 }
809 nextchar += strlen (nextchar);
810 if (longind != NULL)
811 *longind = option_index;
812 if (pfound->flag)
813 {
814 *(pfound->flag) = pfound->val;
815 return 0;
816 }
817 return pfound->val;
818 }
819 nextchar = NULL;
820 return 'W'; /* Let the application handle it. */
821 }
822 if (temp[1] == ':')
823 {
824 if (temp[2] == ':')
825 {
826 /* This is an option that accepts an argument optionally. */
827 if (*nextchar != '\0')
828 {
829 optarg = nextchar;
830 optind++;
831 }
832 else
833 optarg = NULL;
834 nextchar = NULL;
835 }
836 else
837 {
838 /* This is an option that requires an argument. */
839 if (*nextchar != '\0')
840 {
841 optarg = nextchar;
842 /* If we end this ARGV-element by taking the rest as an arg,
843 we must advance to the next element now. */
844 optind++;
845 }
846 else if (optind == argc)
847 {
848 if (print_errors)
849 {
850 /* 1003.2 specifies the format of this message. */
851 fprintf (stderr,
852 _("%s: option requires an argument -- %c\n"),
853 argv[0], c);
854 }
855 optopt = c;
856 if (optstring[0] == ':')
857 c = ':';
858 else
859 c = '?';
860 }
861 else
862 /* We already incremented `optind' once;
863 increment it again when taking next ARGV-elt as argument. */
864 optarg = argv[optind++];
865 nextchar = NULL;
866 }
867 }
868 return c;
869 }
870 }
871
872 int
getopt(argc,argv,optstring)873 getopt (argc, argv, optstring)
874 int argc;
875 char *const *argv;
876 const char *optstring;
877 {
878 return _getopt_internal (argc, argv, optstring,
879 (const struct option *) 0,
880 (int *) 0,
881 0);
882 }
883
884 int
getopt_long(argc,argv,options,long_options,opt_index)885 getopt_long (argc, argv, options, long_options, opt_index)
886 int argc;
887 char *const *argv;
888 const char *options;
889 const struct option *long_options;
890 int *opt_index;
891 {
892 return _getopt_internal (argc, argv, options, long_options, opt_index, 0);
893 }
894
895 /* Like getopt_long, but '-' as well as '--' can indicate a long option.
896 If an option that starts with '-' (not '--') doesn't match a long option,
897 but does match a short option, it is parsed as a short option
898 instead. */
899
900 int
getopt_long_only(argc,argv,options,long_options,opt_index)901 getopt_long_only (argc, argv, options, long_options, opt_index)
902 int argc;
903 char *const *argv;
904 const char *options;
905 const struct option *long_options;
906 int *opt_index;
907 {
908 return _getopt_internal (argc, argv, options, long_options, opt_index, 1);
909 }
910
911
912