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src: partial import from FC Selenite
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 15 May 2020 01:28:16 +0000
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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, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98
7 Free Software Foundation, Inc.
8
9 NOTE: The canonical source of this file is maintained with the GNU C Library.
10 Bugs can be reported to bug-glibc@gnu.org.
11
12 This program is free software; you can redistribute it and/or modify it
13 under the terms of the GNU General Public License as published by the
14 Free Software Foundation; either version 2, or (at your option) any
15 later version.
16
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
21
22 You should have received a copy of the GNU General Public License
23 along with this program; if not, write to the Free Software
24 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
25 USA. */
26
27 /* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>.
28 Ditto for AIX 3.2 and <stdlib.h>. */
29 #ifndef _NO_PROTO
30 # define _NO_PROTO
31 #endif
32
33 #ifdef HAVE_CONFIG_H
34 # include <config.h>
35 #endif
36
37 #if !defined __STDC__ || !__STDC__
38 /* This is a separate conditional since some stdc systems
39 reject `defined (const)'. */
40 # ifndef const
41 # define const
42 # endif
43 #endif
44
45 #include <stdio.h>
46
47 /* Comment out all this code if we are using the GNU C Library, and are not
48 actually compiling the library itself. This code is part of the GNU C
49 Library, but also included in many other GNU distributions. Compiling
50 and linking in this code is a waste when using the GNU C library
51 (especially if it is a shared library). Rather than having every GNU
52 program understand `configure --with-gnu-libc' and omit the object files,
53 it is simpler to just do this in the source for each such file. */
54
55 #define GETOPT_INTERFACE_VERSION 2
56 #if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2
57 # include <gnu-versions.h>
58 # if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
59 # define ELIDE_CODE
60 # endif
61 #endif
62
63 #ifndef ELIDE_CODE
64
65
66 /* This needs to come after some library #include
67 to get __GNU_LIBRARY__ defined. */
68 #ifdef __GNU_LIBRARY__
69 /* Don't include stdlib.h for non-GNU C libraries because some of them
70 contain conflicting prototypes for getopt. */
71 # include <stdlib.h>
72 # include <unistd.h>
73 #endif /* GNU C library. */
74
75 #ifdef VMS
76 # include <unixlib.h>
77 # if HAVE_STRING_H - 0
78 # include "string.h"
79 # endif
80 #endif
81
82 #ifndef _
83 /* This is for other GNU distributions with internationalized messages.
84 When compiling libc, the _ macro is predefined. */
85 # ifdef HAVE_LIBINTL_H
86 # include <libintl.h>
87 # define _(msgid) gettext (msgid)
88 # else
89 # define _(msgid) (msgid)
90 # endif
91 #endif
92
93 /* This version of `getopt' appears to the caller like standard Unix `getopt'
94 but it behaves differently for the user, since it allows the user
95 to intersperse the options with the other arguments.
96
97 As `getopt' works, it permutes the elements of ARGV so that,
98 when it is done, all the options precede everything else. Thus
99 all application programs are extended to handle flexible argument order.
100
101 Setting the environment variable POSIXLY_CORRECT disables permutation.
102 Then the behavior is completely standard.
103
104 GNU application programs can use a third alternative mode in which
105 they can distinguish the relative order of options and other arguments. */
106
107 #include "getopt.h"
108
109 /* For communication from `getopt' to the caller.
110 When `getopt' finds an option that takes an argument,
111 the argument value is returned here.
112 Also, when `ordering' is RETURN_IN_ORDER,
113 each non-option ARGV-element is returned here. */
114
115 char *optarg = NULL;
116
117 /* Index in ARGV of the next element to be scanned.
118 This is used for communication to and from the caller
119 and for communication between successive calls to `getopt'.
120
121 On entry to `getopt', zero means this is the first call; initialize.
122
123 When `getopt' returns -1, this is the index of the first of the
124 non-option elements that the caller should itself scan.
125
126 Otherwise, `optind' communicates from one call to the next
127 how much of ARGV has been scanned so far. */
128
129 /* 1003.2 says this must be 1 before any call. */
130 int optind = 1;
131
132 /* Formerly, initialization of getopt depended on optind==0, which
133 causes problems with re-calling getopt as programs generally don't
134 know that. */
135
136 int __getopt_initialized = 0;
137
138 /* The next char to be scanned in the option-element
139 in which the last option character we returned was found.
140 This allows us to pick up the scan where we left off.
141
142 If this is zero, or a null string, it means resume the scan
143 by advancing to the next ARGV-element. */
144
145 static char *nextchar;
146
147 /* Callers store zero here to inhibit the error message
148 for unrecognized options. */
149
150 int opterr = 1;
151
152 /* Set to an option character which was unrecognized.
153 This must be initialized on some systems to avoid linking in the
154 system's own getopt implementation. */
155
156 int optopt = '?';
157
158 /* Describe how to deal with options that follow non-option ARGV-elements.
159
160 If the caller did not specify anything,
161 the default is REQUIRE_ORDER if the environment variable
162 POSIXLY_CORRECT is defined, PERMUTE otherwise.
163
164 REQUIRE_ORDER means don't recognize them as options;
165 stop option processing when the first non-option is seen.
166 This is what Unix does.
167 This mode of operation is selected by either setting the environment
168 variable POSIXLY_CORRECT, or using `+' as the first character
169 of the list of option characters.
170
171 PERMUTE is the default. We permute the contents of ARGV as we scan,
172 so that eventually all the non-options are at the end. This allows options
173 to be given in any order, even with programs that were not written to
174 expect this.
175
176 RETURN_IN_ORDER is an option available to programs that were written
177 to expect options and other ARGV-elements in any order and that care about
178 the ordering of the two. We describe each non-option ARGV-element
179 as if it were the argument of an option with character code 1.
180 Using `-' as the first character of the list of option characters
181 selects this mode of operation.
182
183 The special argument `--' forces an end of option-scanning regardless
184 of the value of `ordering'. In the case of RETURN_IN_ORDER, only
185 `--' can cause `getopt' to return -1 with `optind' != ARGC. */
186
187 static enum
188 {
189 REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
190 } ordering;
191
192 /* Value of POSIXLY_CORRECT environment variable. */
193 static char *posixly_correct;
194
195 #ifdef __GNU_LIBRARY__
196 /* We want to avoid inclusion of string.h with non-GNU libraries
197 because there are many ways it can cause trouble.
198 On some systems, it contains special magic macros that don't work
199 in GCC. */
200 # include "string.h"
201 # define my_index strchr
202 #else
203
204 # if HAVE_STRING_H
205 # include <string.h>
206 # else
207 # include "strings.h"
208 # endif
209
210 /* Avoid depending on library functions or files
211 whose names are inconsistent. */
212
213 #ifndef getenv
214 extern char *getenv ();
215 #endif
216
217 static char *
218 my_index (str, chr)
219 const char *str;
220 int chr;
221 {
222 while (*str)
223 {
224 if (*str == chr)
225 return (char *) str;
226 str++;
227 }
228 return 0;
229 }
230
231 /* If using GCC, we can safely declare strlen this way.
232 If not using GCC, it is ok not to declare it. */
233 #ifdef __GNUC__
234 /* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h.
235 That was relevant to code that was here before. */
236 # if (!defined __STDC__ || !__STDC__) && !defined strlen
237 /* gcc with -traditional declares the built-in strlen to return int,
238 and has done so at least since version 2.4.5. -- rms. */
239 extern int strlen (const char *);
240 # endif /* not __STDC__ */
241 #endif /* __GNUC__ */
242
243 #endif /* not __GNU_LIBRARY__ */
244
245 /* Handle permutation of arguments. */
246
247 /* Describe the part of ARGV that contains non-options that have
248 been skipped. `first_nonopt' is the index in ARGV of the first of them;
249 `last_nonopt' is the index after the last of them. */
250
251 static int first_nonopt;
252 static int last_nonopt;
253
254 #ifdef _LIBC
255 /* Bash 2.0 gives us an environment variable containing flags
256 indicating ARGV elements that should not be considered arguments. */
257
258 /* Defined in getopt_init.c */
259 extern char *__getopt_nonoption_flags;
260
261 static int nonoption_flags_max_len;
262 static int nonoption_flags_len;
263
264 static int original_argc;
265 static char *const *original_argv;
266
267 /* Make sure the environment variable bash 2.0 puts in the environment
268 is valid for the getopt call we must make sure that the ARGV passed
269 to getopt is that one passed to the process. */
270 static void
271 __attribute__ ((unused))
272 store_args_and_env (int argc, char *const *argv)
273 {
274 /* XXX This is no good solution. We should rather copy the args so
275 that we can compare them later. But we must not use malloc(3). */
276 original_argc = argc;
277 original_argv = argv;
278 }
279 # ifdef text_set_element
280 text_set_element (__libc_subinit, store_args_and_env);
281 # endif /* text_set_element */
282
283 # define SWAP_FLAGS(ch1, ch2) \
284 if (nonoption_flags_len > 0) \
285 { \
286 char __tmp = __getopt_nonoption_flags[ch1]; \
287 __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \
288 __getopt_nonoption_flags[ch2] = __tmp; \
289 }
290 #else /* !_LIBC */
291 # define SWAP_FLAGS(ch1, ch2)
292 #endif /* _LIBC */
293
294 /* Exchange two adjacent subsequences of ARGV.
295 One subsequence is elements [first_nonopt,last_nonopt)
296 which contains all the non-options that have been skipped so far.
297 The other is elements [last_nonopt,optind), which contains all
298 the options processed since those non-options were skipped.
299
300 `first_nonopt' and `last_nonopt' are relocated so that they describe
301 the new indices of the non-options in ARGV after they are moved. */
302
303 #if defined __STDC__ && __STDC__
304 static void exchange (char **);
305 #endif
306
307 static void
308 exchange (argv)
309 char **argv;
310 {
311 int bottom = first_nonopt;
312 int middle = last_nonopt;
313 int top = optind;
314 char *tem;
315
316 /* Exchange the shorter segment with the far end of the longer segment.
317 That puts the shorter segment into the right place.
318 It leaves the longer segment in the right place overall,
319 but it consists of two parts that need to be swapped next. */
320
321 #ifdef _LIBC
322 /* First make sure the handling of the `__getopt_nonoption_flags'
323 string can work normally. Our top argument must be in the range
324 of the string. */
325 if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len)
326 {
327 /* We must extend the array. The user plays games with us and
328 presents new arguments. */
329 char *new_str = malloc (top + 1);
330 if (new_str == NULL)
331 nonoption_flags_len = nonoption_flags_max_len = 0;
332 else
333 {
334 memset (__mempcpy (new_str, __getopt_nonoption_flags,
335 nonoption_flags_max_len),
336 '\0', top + 1 - nonoption_flags_max_len);
337 nonoption_flags_max_len = top + 1;
338 __getopt_nonoption_flags = new_str;
339 }
340 }
341 #endif
342
343 while (top > middle && middle > bottom)
344 {
345 if (top - middle > middle - bottom)
346 {
347 /* Bottom segment is the short one. */
348 int len = middle - bottom;
349 register int i;
350
351 /* Swap it with the top part of the top segment. */
352 for (i = 0; i < len; i++)
353 {
354 tem = argv[bottom + i];
355 argv[bottom + i] = argv[top - (middle - bottom) + i];
356 argv[top - (middle - bottom) + i] = tem;
357 SWAP_FLAGS (bottom + i, top - (middle - bottom) + i);
358 }
359 /* Exclude the moved bottom segment from further swapping. */
360 top -= len;
361 }
362 else
363 {
364 /* Top segment is the short one. */
365 int len = top - middle;
366 register int i;
367
368 /* Swap it with the bottom part of the bottom segment. */
369 for (i = 0; i < len; i++)
370 {
371 tem = argv[bottom + i];
372 argv[bottom + i] = argv[middle + i];
373 argv[middle + i] = tem;
374 SWAP_FLAGS (bottom + i, middle + i);
375 }
376 /* Exclude the moved top segment from further swapping. */
377 bottom += len;
378 }
379 }
380
381 /* Update records for the slots the non-options now occupy. */
382
383 first_nonopt += (optind - last_nonopt);
384 last_nonopt = optind;
385 }
386
387 /* Initialize the internal data when the first call is made. */
388
389 #if defined __STDC__ && __STDC__
390 static const char *_getopt_initialize (int, char *const *, const char *);
391 #endif
392 static const char *
393 _getopt_initialize (argc, argv, optstring)
394 int argc;
395 char *const *argv;
396 const char *optstring;
397 {
398 /* Start processing options with ARGV-element 1 (since ARGV-element 0
399 is the program name); the sequence of previously skipped
400 non-option ARGV-elements is empty. */
401
402 first_nonopt = last_nonopt = optind;
403
404 nextchar = NULL;
405
406 posixly_correct = getenv ("POSIXLY_CORRECT");
407
408 /* Determine how to handle the ordering of options and nonoptions. */
409
410 if (optstring[0] == '-')
411 {
412 ordering = RETURN_IN_ORDER;
413 ++optstring;
414 }
415 else if (optstring[0] == '+')
416 {
417 ordering = REQUIRE_ORDER;
418 ++optstring;
419 }
420 else if (posixly_correct != NULL)
421 ordering = REQUIRE_ORDER;
422 else
423 ordering = PERMUTE;
424
425 #ifdef _LIBC
426 if (posixly_correct == NULL
427 && argc == original_argc && argv == original_argv)
428 {
429 if (nonoption_flags_max_len == 0)
430 {
431 if (__getopt_nonoption_flags == NULL
432 || __getopt_nonoption_flags[0] == '\0')
433 nonoption_flags_max_len = -1;
434 else
435 {
436 const char *orig_str = __getopt_nonoption_flags;
437 int len = nonoption_flags_max_len = strlen (orig_str);
438 if (nonoption_flags_max_len < argc)
439 nonoption_flags_max_len = argc;
440 __getopt_nonoption_flags =
441 (char *) malloc (nonoption_flags_max_len);
442 if (__getopt_nonoption_flags == NULL)
443 nonoption_flags_max_len = -1;
444 else
445 memset (__mempcpy (__getopt_nonoption_flags, orig_str, len),
446 '\0', nonoption_flags_max_len - len);
447 }
448 }
449 nonoption_flags_len = nonoption_flags_max_len;
450 }
451 else
452 nonoption_flags_len = 0;
453 #endif
454
455 return optstring;
456 }
457
458 /* Scan elements of ARGV (whose length is ARGC) for option characters
459 given in OPTSTRING.
460
461 If an element of ARGV starts with '-', and is not exactly "-" or "--",
462 then it is an option element. The characters of this element
463 (aside from the initial '-') are option characters. If `getopt'
464 is called repeatedly, it returns successively each of the option characters
465 from each of the option elements.
466
467 If `getopt' finds another option character, it returns that character,
468 updating `optind' and `nextchar' so that the next call to `getopt' can
469 resume the scan with the following option character or ARGV-element.
470
471 If there are no more option characters, `getopt' returns -1.
472 Then `optind' is the index in ARGV of the first ARGV-element
473 that is not an option. (The ARGV-elements have been permuted
474 so that those that are not options now come last.)
475
476 OPTSTRING is a string containing the legitimate option characters.
477 If an option character is seen that is not listed in OPTSTRING,
478 return '?' after printing an error message. If you set `opterr' to
479 zero, the error message is suppressed but we still return '?'.
480
481 If a char in OPTSTRING is followed by a colon, that means it wants an arg,
482 so the following text in the same ARGV-element, or the text of the following
483 ARGV-element, is returned in `optarg'. Two colons mean an option that
484 wants an optional arg; if there is text in the current ARGV-element,
485 it is returned in `optarg', otherwise `optarg' is set to zero.
486
487 If OPTSTRING starts with `-' or `+', it requests different methods of
488 handling the non-option ARGV-elements.
489 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
490
491 Long-named options begin with `--' instead of `-'.
492 Their names may be abbreviated as long as the abbreviation is unique
493 or is an exact match for some defined option. If they have an
494 argument, it follows the option name in the same ARGV-element, separated
495 from the option name by a `=', or else the in next ARGV-element.
496 When `getopt' finds a long-named option, it returns 0 if that option's
497 `flag' field is nonzero, the value of the option's `val' field
498 if the `flag' field is zero.
499
500 The elements of ARGV aren't really const, because we permute them.
501 But we pretend they're const in the prototype to be compatible
502 with other systems.
503
504 LONGOPTS is a vector of `struct option' terminated by an
505 element containing a name which is zero.
506
507 LONGIND returns the index in LONGOPT of the long-named option found.
508 It is only valid when a long-named option has been found by the most
509 recent call.
510
511 If LONG_ONLY is nonzero, '-' as well as '--' can introduce
512 long-named options. */
513
514 int
515 _getopt_internal (argc, argv, optstring, longopts, longind, long_only)
516 int argc;
517 char *const *argv;
518 const char *optstring;
519 const struct option *longopts;
520 int *longind;
521 int long_only;
522 {
523 optarg = NULL;
524
525 if (optind == 0 || !__getopt_initialized)
526 {
527 if (optind == 0)
528 optind = 1; /* Don't scan ARGV[0], the program name. */
529 optstring = _getopt_initialize (argc, argv, optstring);
530 __getopt_initialized = 1;
531 }
532
533 /* Test whether ARGV[optind] points to a non-option argument.
534 Either it does not have option syntax, or there is an environment flag
535 from the shell indicating it is not an option. The later information
536 is only used when the used in the GNU libc. */
537 #ifdef _LIBC
538 # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \
539 || (optind < nonoption_flags_len \
540 && __getopt_nonoption_flags[optind] == '1'))
541 #else
542 # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0')
543 #endif
544
545 if (nextchar == NULL || *nextchar == '\0')
546 {
547 /* Advance to the next ARGV-element. */
548
549 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been
550 moved back by the user (who may also have changed the arguments). */
551 if (last_nonopt > optind)
552 last_nonopt = optind;
553 if (first_nonopt > optind)
554 first_nonopt = optind;
555
556 if (ordering == PERMUTE)
557 {
558 /* If we have just processed some options following some non-options,
559 exchange them so that the options come first. */
560
561 if (first_nonopt != last_nonopt && last_nonopt != optind)
562 exchange ((char **) argv);
563 else if (last_nonopt != optind)
564 first_nonopt = optind;
565
566 /* Skip any additional non-options
567 and extend the range of non-options previously skipped. */
568
569 while (optind < argc && NONOPTION_P)
570 optind++;
571 last_nonopt = optind;
572 }
573
574 /* The special ARGV-element `--' means premature end of options.
575 Skip it like a null option,
576 then exchange with previous non-options as if it were an option,
577 then skip everything else like a non-option. */
578
579 if (optind != argc && !strcmp (argv[optind], "--"))
580 {
581 optind++;
582
583 if (first_nonopt != last_nonopt && last_nonopt != optind)
584 exchange ((char **) argv);
585 else if (first_nonopt == last_nonopt)
586 first_nonopt = optind;
587 last_nonopt = argc;
588
589 optind = argc;
590 }
591
592 /* If we have done all the ARGV-elements, stop the scan
593 and back over any non-options that we skipped and permuted. */
594
595 if (optind == argc)
596 {
597 /* Set the next-arg-index to point at the non-options
598 that we previously skipped, so the caller will digest them. */
599 if (first_nonopt != last_nonopt)
600 optind = first_nonopt;
601 return -1;
602 }
603
604 /* If we have come to a non-option and did not permute it,
605 either stop the scan or describe it to the caller and pass it by. */
606
607 if (NONOPTION_P)
608 {
609 if (ordering == REQUIRE_ORDER)
610 return -1;
611 optarg = argv[optind++];
612 return 1;
613 }
614
615 /* We have found another option-ARGV-element.
616 Skip the initial punctuation. */
617
618 nextchar = (argv[optind] + 1
619 + (longopts != NULL && argv[optind][1] == '-'));
620 }
621
622 /* Decode the current option-ARGV-element. */
623
624 /* Check whether the ARGV-element is a long option.
625
626 If long_only and the ARGV-element has the form "-f", where f is
627 a valid short option, don't consider it an abbreviated form of
628 a long option that starts with f. Otherwise there would be no
629 way to give the -f short option.
630
631 On the other hand, if there's a long option "fubar" and
632 the ARGV-element is "-fu", do consider that an abbreviation of
633 the long option, just like "--fu", and not "-f" with arg "u".
634
635 This distinction seems to be the most useful approach. */
636
637 if (longopts != NULL
638 && (argv[optind][1] == '-'
639 || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1])))))
640 {
641 char *nameend;
642 const struct option *p;
643 const struct option *pfound = NULL;
644 int exact = 0;
645 int ambig = 0;
646 int indfound = -1;
647 int option_index;
648
649 for (nameend = nextchar; *nameend && *nameend != '='; nameend++)
650 /* Do nothing. */ ;
651
652 /* Test all long options for either exact match
653 or abbreviated matches. */
654 for (p = longopts, option_index = 0; p->name; p++, option_index++)
655 if (!strncmp (p->name, nextchar, nameend - nextchar))
656 {
657 if ((unsigned int) (nameend - nextchar)
658 == (unsigned int) strlen (p->name))
659 {
660 /* Exact match found. */
661 pfound = p;
662 indfound = option_index;
663 exact = 1;
664 break;
665 }
666 else if (pfound == NULL)
667 {
668 /* First nonexact match found. */
669 pfound = p;
670 indfound = option_index;
671 }
672 else
673 /* Second or later nonexact match found. */
674 ambig = 1;
675 }
676
677 if (ambig && !exact)
678 {
679 if (opterr)
680 fprintf (stderr, _("%s: option `%s' is ambiguous\n"),
681 argv[0], argv[optind]);
682 nextchar += strlen (nextchar);
683 optind++;
684 optopt = 0;
685 return '?';
686 }
687
688 if (pfound != NULL)
689 {
690 option_index = indfound;
691 optind++;
692 if (*nameend)
693 {
694 /* Don't test has_arg with >, because some C compilers don't
695 allow it to be used on enums. */
696 if (pfound->has_arg)
697 optarg = nameend + 1;
698 else
699 {
700 if (opterr)
701 if (argv[optind - 1][1] == '-')
702 /* --option */
703 fprintf (stderr,
704 _("%s: option `--%s' doesn't allow an argument\n"),
705 argv[0], pfound->name);
706 else
707 /* +option or -option */
708 fprintf (stderr,
709 _("%s: option `%c%s' doesn't allow an argument\n"),
710 argv[0], argv[optind - 1][0], pfound->name);
711
712 nextchar += strlen (nextchar);
713
714 optopt = pfound->val;
715 return '?';
716 }
717 }
718 else if (pfound->has_arg == 1)
719 {
720 if (optind < argc)
721 optarg = argv[optind++];
722 else
723 {
724 if (opterr)
725 fprintf (stderr,
726 _("%s: option `%s' requires an argument\n"),
727 argv[0], argv[optind - 1]);
728 nextchar += strlen (nextchar);
729 optopt = pfound->val;
730 return optstring[0] == ':' ? ':' : '?';
731 }
732 }
733 nextchar += strlen (nextchar);
734 if (longind != NULL)
735 *longind = option_index;
736 if (pfound->flag)
737 {
738 *(pfound->flag) = pfound->val;
739 return 0;
740 }
741 return pfound->val;
742 }
743
744 /* Can't find it as a long option. If this is not getopt_long_only,
745 or the option starts with '--' or is not a valid short
746 option, then it's an error.
747 Otherwise interpret it as a short option. */
748 if (!long_only || argv[optind][1] == '-'
749 || my_index (optstring, *nextchar) == NULL)
750 {
751 if (opterr)
752 {
753 if (argv[optind][1] == '-')
754 /* --option */
755 fprintf (stderr, _("%s: unrecognized option `--%s'\n"),
756 argv[0], nextchar);
757 else
758 /* +option or -option */
759 fprintf (stderr, _("%s: unrecognized option `%c%s'\n"),
760 argv[0], argv[optind][0], nextchar);
761 }
762 nextchar = (char *) "";
763 optind++;
764 optopt = 0;
765 return '?';
766 }
767 }
768
769 /* Look at and handle the next short option-character. */
770
771 {
772 char c = *nextchar++;
773 char *temp = my_index (optstring, c);
774
775 /* Increment `optind' when we start to process its last character. */
776 if (*nextchar == '\0')
777 ++optind;
778
779 if (temp == NULL || c == ':')
780 {
781 if (opterr)
782 {
783 if (posixly_correct)
784 /* 1003.2 specifies the format of this message. */
785 fprintf (stderr, _("%s: illegal option -- %c\n"),
786 argv[0], c);
787 else
788 fprintf (stderr, _("%s: invalid option -- %c\n"),
789 argv[0], c);
790 }
791 optopt = c;
792 return '?';
793 }
794 /* Convenience. Treat POSIX -W foo same as long option --foo */
795 if (temp[0] == 'W' && temp[1] == ';')
796 {
797 char *nameend;
798 const struct option *p;
799 const struct option *pfound = NULL;
800 int exact = 0;
801 int ambig = 0;
802 int indfound = 0;
803 int option_index;
804
805 /* This is an option that requires an argument. */
806 if (*nextchar != '\0')
807 {
808 optarg = nextchar;
809 /* If we end this ARGV-element by taking the rest as an arg,
810 we must advance to the next element now. */
811 optind++;
812 }
813 else if (optind == argc)
814 {
815 if (opterr)
816 {
817 /* 1003.2 specifies the format of this message. */
818 fprintf (stderr, _("%s: option requires an argument -- %c\n"),
819 argv[0], c);
820 }
821 optopt = c;
822 if (optstring[0] == ':')
823 c = ':';
824 else
825 c = '?';
826 return c;
827 }
828 else
829 /* We already incremented `optind' once;
830 increment it again when taking next ARGV-elt as argument. */
831 optarg = argv[optind++];
832
833 /* optarg is now the argument, see if it's in the
834 table of longopts. */
835
836 for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++)
837 /* Do nothing. */ ;
838
839 /* Test all long options for either exact match
840 or abbreviated matches. */
841 for (p = longopts, option_index = 0; p->name; p++, option_index++)
842 if (!strncmp (p->name, nextchar, nameend - nextchar))
843 {
844 if ((unsigned int) (nameend - nextchar) == strlen (p->name))
845 {
846 /* Exact match found. */
847 pfound = p;
848 indfound = option_index;
849 exact = 1;
850 break;
851 }
852 else if (pfound == NULL)
853 {
854 /* First nonexact match found. */
855 pfound = p;
856 indfound = option_index;
857 }
858 else
859 /* Second or later nonexact match found. */
860 ambig = 1;
861 }
862 if (ambig && !exact)
863 {
864 if (opterr)
865 fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"),
866 argv[0], argv[optind]);
867 nextchar += strlen (nextchar);
868 optind++;
869 return '?';
870 }
871 if (pfound != NULL)
872 {
873 option_index = indfound;
874 if (*nameend)
875 {
876 /* Don't test has_arg with >, because some C compilers don't
877 allow it to be used on enums. */
878 if (pfound->has_arg)
879 optarg = nameend + 1;
880 else
881 {
882 if (opterr)
883 fprintf (stderr, _("\
884 %s: option `-W %s' doesn't allow an argument\n"),
885 argv[0], pfound->name);
886
887 nextchar += strlen (nextchar);
888 return '?';
889 }
890 }
891 else if (pfound->has_arg == 1)
892 {
893 if (optind < argc)
894 optarg = argv[optind++];
895 else
896 {
897 if (opterr)
898 fprintf (stderr,
899 _("%s: option `%s' requires an argument\n"),
900 argv[0], argv[optind - 1]);
901 nextchar += strlen (nextchar);
902 return optstring[0] == ':' ? ':' : '?';
903 }
904 }
905 nextchar += strlen (nextchar);
906 if (longind != NULL)
907 *longind = option_index;
908 if (pfound->flag)
909 {
910 *(pfound->flag) = pfound->val;
911 return 0;
912 }
913 return pfound->val;
914 }
915 nextchar = NULL;
916 return 'W'; /* Let the application handle it. */
917 }
918 if (temp[1] == ':')
919 {
920 if (temp[2] == ':')
921 {
922 /* This is an option that accepts an argument optionally. */
923 if (*nextchar != '\0')
924 {
925 optarg = nextchar;
926 optind++;
927 }
928 else
929 optarg = NULL;
930 nextchar = NULL;
931 }
932 else
933 {
934 /* This is an option that requires an argument. */
935 if (*nextchar != '\0')
936 {
937 optarg = nextchar;
938 /* If we end this ARGV-element by taking the rest as an arg,
939 we must advance to the next element now. */
940 optind++;
941 }
942 else if (optind == argc)
943 {
944 if (opterr)
945 {
946 /* 1003.2 specifies the format of this message. */
947 fprintf (stderr,
948 _("%s: option requires an argument -- %c\n"),
949 argv[0], c);
950 }
951 optopt = c;
952 if (optstring[0] == ':')
953 c = ':';
954 else
955 c = '?';
956 }
957 else
958 /* We already incremented `optind' once;
959 increment it again when taking next ARGV-elt as argument. */
960 optarg = argv[optind++];
961 nextchar = NULL;
962 }
963 }
964 return c;
965 }
966 }
967
968 int
969 getopt (argc, argv, optstring)
970 int argc;
971 char *const *argv;
972 const char *optstring;
973 {
974 return _getopt_internal (argc, argv, optstring,
975 (const struct option *) 0,
976 (int *) 0,
977 0);
978 }
979
980 #endif /* Not ELIDE_CODE. */
981
982 #ifdef TEST
983
984 /* Compile with -DTEST to make an executable for use in testing
985 the above definition of `getopt'. */
986
987 int
988 main (argc, argv)
989 int argc;
990 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 */