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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 along
23 * with this program; see the file COPYING; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
25 */
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 #include <zebra.h>
34
35 #if !defined __STDC__ || !__STDC__
36 /* This is a separate conditional since some stdc systems
37 reject `defined (const)'. */
38 #ifndef const
39 # define const
40 #endif
41 #endif
42
43 #include <stdio.h>
44
45 /* Comment out all this code if we are using the GNU C Library, and are not
46 actually compiling the library itself. This code is part of the GNU C
47 Library, but also included in many other GNU distributions. Compiling
48 and linking in this code is a waste when using the GNU C library
49 (especially if it is a shared library). Rather than having every GNU
50 program understand `configure --with-gnu-libc' and omit the object files,
51 it is simpler to just do this in the source for each such file. */
52
53 #define GETOPT_INTERFACE_VERSION 2
54 #if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2
55 #include <gnu-versions.h>
56 #if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
57 # define ELIDE_CODE
58 #endif
59 #endif
60
61 #ifndef ELIDE_CODE
62
63
64 /* This needs to come after some library #include
65 to get __GNU_LIBRARY__ defined. */
66 #ifdef __GNU_LIBRARY__
67 /* Don't include stdlib.h for non-GNU C libraries because some of them
68 contain conflicting prototypes for getopt. */
69 #include <stdlib.h>
70 #include <unistd.h>
71 #endif /* GNU C library. */
72
73 #ifdef VMS
74 #include <unixlib.h>
75 #if HAVE_STRING_H - 0
76 #include <string.h>
77 #endif
78 #endif
79
80 #ifndef _
81 /* This is for other GNU distributions with internationalized messages.
82 When compiling libc, the _ macro is predefined. */
83 #ifdef HAVE_LIBINTL_H
84 #include <libintl.h>
85 # define _(msgid) gettext (msgid)
86 #else
87 # define _(msgid) (msgid)
88 #endif
89 #endif
90
91 /* This version of `getopt' appears to the caller like standard Unix `getopt'
92 but it behaves differently for the user, since it allows the user
93 to intersperse the options with the other arguments.
94
95 As `getopt' works, it permutes the elements of ARGV so that,
96 when it is done, all the options precede everything else. Thus
97 all application programs are extended to handle flexible argument order.
98
99 Setting the environment variable POSIXLY_CORRECT disables permutation.
100 Then the behavior is completely standard.
101
102 GNU application programs can use a third alternative mode in which
103 they can distinguish the relative order of options and other arguments. */
104
105 #include "getopt.h"
106
107 /* For communication from `getopt' to the caller.
108 When `getopt' finds an option that takes an argument,
109 the argument value is returned here.
110 Also, when `ordering' is RETURN_IN_ORDER,
111 each non-option ARGV-element is returned here. */
112
113 char *optarg = NULL;
114
115 /* Index in ARGV of the next element to be scanned.
116 This is used for communication to and from the caller
117 and for communication between successive calls to `getopt'.
118
119 On entry to `getopt', zero means this is the first call; initialize.
120
121 When `getopt' returns -1, this is the index of the first of the
122 non-option elements that the caller should itself scan.
123
124 Otherwise, `optind' communicates from one call to the next
125 how much of ARGV has been scanned so far. */
126
127 /* 1003.2 says this must be 1 before any call. */
128 int optind = 1;
129
130 /* Formerly, initialization of getopt depended on optind==0, which
131 causes problems with re-calling getopt as programs generally don't
132 know that. */
133
134 int __getopt_initialized = 0;
135
136 /* The next char to be scanned in the option-element
137 in which the last option character we returned was found.
138 This allows us to pick up the scan where we left off.
139
140 If this is zero, or a null string, it means resume the scan
141 by advancing to the next ARGV-element. */
142
143 static char *nextchar;
144
145 /* Callers store zero here to inhibit the error message
146 for unrecognized options. */
147
148 int opterr = 1;
149
150 /* Set to an option character which was unrecognized.
151 This must be initialized on some systems to avoid linking in the
152 system's own getopt implementation. */
153
154 int optopt = '?';
155
156 /* Describe how to deal with options that follow non-option ARGV-elements.
157
158 If the caller did not specify anything,
159 the default is REQUIRE_ORDER if the environment variable
160 POSIXLY_CORRECT is defined, PERMUTE otherwise.
161
162 REQUIRE_ORDER means don't recognize them as options;
163 stop option processing when the first non-option is seen.
164 This is what Unix does.
165 This mode of operation is selected by either setting the environment
166 variable POSIXLY_CORRECT, or using `+' as the first character
167 of the list of option characters.
168
169 PERMUTE is the default. We permute the contents of ARGV as we scan,
170 so that eventually all the non-options are at the end. This allows options
171 to be given in any order, even with programs that were not written to
172 expect this.
173
174 RETURN_IN_ORDER is an option available to programs that were written
175 to expect options and other ARGV-elements in any order and that care about
176 the ordering of the two. We describe each non-option ARGV-element
177 as if it were the argument of an option with character code 1.
178 Using `-' as the first character of the list of option characters
179 selects this mode of operation.
180
181 The special argument `--' forces an end of option-scanning regardless
182 of the value of `ordering'. In the case of RETURN_IN_ORDER, only
183 `--' can cause `getopt' to return -1 with `optind' != ARGC. */
184
185 static enum { REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER } ordering;
186
187 /* Value of POSIXLY_CORRECT environment variable. */
188 static char *posixly_correct;
189
190 #ifdef __GNU_LIBRARY__
191 /* We want to avoid inclusion of string.h with non-GNU libraries
192 because there are many ways it can cause trouble.
193 On some systems, it contains special magic macros that don't work
194 in GCC. */
195 #include <string.h>
196 # define my_index strchr
197 #else
198
199 #if HAVE_STRING_H
200 #include <string.h>
201 #else
202 #include <strings.h>
203 #endif
204
205 /* Avoid depending on library functions or files
206 whose names are inconsistent. */
207
208 #ifndef getenv
209 extern char *getenv();
210 #endif
211
212 static char *my_index(str, chr) const char *str;
213 int chr;
214 {
215 while (*str) {
216 if (*str == chr)
217 return (char *)str;
218 str++;
219 }
220 return 0;
221 }
222
223 /* If using GCC, we can safely declare strlen this way.
224 If not using GCC, it is ok not to declare it. */
225 #ifdef __GNUC__
226 /* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h.
227 That was relevant to code that was here before. */
228 #if (!defined __STDC__ || !__STDC__) && !defined strlen
229 /* gcc with -traditional declares the built-in strlen to return int,
230 and has done so at least since version 2.4.5. -- rms. */
231 extern int strlen(const char *);
232 #endif /* not __STDC__ */
233 #endif /* __GNUC__ */
234
235 #endif /* not __GNU_LIBRARY__ */
236
237 /* Handle permutation of arguments. */
238
239 /* Describe the part of ARGV that contains non-options that have
240 been skipped. `first_nonopt' is the index in ARGV of the first of them;
241 `last_nonopt' is the index after the last of them. */
242
243 static int first_nonopt;
244 static int last_nonopt;
245
246 #ifdef _LIBC
247 /* Bash 2.0 gives us an environment variable containing flags
248 indicating ARGV elements that should not be considered arguments. */
249
250 /* Defined in getopt_init.c */
251 extern char *__getopt_nonoption_flags;
252
253 static int nonoption_flags_max_len;
254 static int nonoption_flags_len;
255
256 static int original_argc;
257 static char *const *original_argv;
258
259 /* Make sure the environment variable bash 2.0 puts in the environment
260 is valid for the getopt call we must make sure that the ARGV passed
261 to getopt is that one passed to the process. */
262 static void __attribute__((unused))
263 store_args_and_env(int argc, char *const *argv)
264 {
265 /* XXX This is no good solution. We should rather copy the args so
266 that we can compare them later. But we must not use malloc(3). */
267 original_argc = argc;
268 original_argv = argv;
269 }
270 #ifdef text_set_element
271 text_set_element(__libc_subinit, store_args_and_env);
272 #endif /* text_set_element */
273
274 #define SWAP_FLAGS(ch1, ch2) \
275 if (nonoption_flags_len > 0) { \
276 char __tmp = __getopt_nonoption_flags[ch1]; \
277 __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \
278 __getopt_nonoption_flags[ch2] = __tmp; \
279 }
280 #else /* !_LIBC */
281 # define SWAP_FLAGS(ch1, ch2)
282 #endif /* _LIBC */
283
284 /* Exchange two adjacent subsequences of ARGV.
285 One subsequence is elements [first_nonopt,last_nonopt)
286 which contains all the non-options that have been skipped so far.
287 The other is elements [last_nonopt,optind), which contains all
288 the options processed since those non-options were skipped.
289
290 `first_nonopt' and `last_nonopt' are relocated so that they describe
291 the new indices of the non-options in ARGV after they are moved. */
292
293 #if defined __STDC__ && __STDC__
294 static void exchange(char **);
295 #endif
296
297 static void exchange(argv) char **argv;
298 {
299 int bottom = first_nonopt;
300 int middle = last_nonopt;
301 int top = optind;
302 char *tem;
303
304 /* Exchange the shorter segment with the far end of the longer segment.
305 That puts the shorter segment into the right place.
306 It leaves the longer segment in the right place overall,
307 but it consists of two parts that need to be swapped next. */
308
309 #ifdef _LIBC
310 /* First make sure the handling of the `__getopt_nonoption_flags'
311 string can work normally. Our top argument must be in the range
312 of the string. */
313 if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len) {
314 /* We must extend the array. The user plays games with us and
315 presents new arguments. */
316 char *new_str = malloc(top + 1);
317 if (new_str == NULL)
318 nonoption_flags_len = nonoption_flags_max_len = 0;
319 else {
320 memset(__mempcpy(new_str, __getopt_nonoption_flags,
321 nonoption_flags_max_len),
322 '\0', top + 1 - nonoption_flags_max_len);
323 nonoption_flags_max_len = top + 1;
324 __getopt_nonoption_flags = new_str;
325 }
326 }
327 #endif
328
329 while (top > middle && middle > bottom) {
330 if (top - middle > middle - bottom) {
331 /* Bottom segment is the short one. */
332 int len = middle - bottom;
333 register int i;
334
335 /* Swap it with the top part of the top segment. */
336 for (i = 0; i < len; i++) {
337 tem = argv[bottom + i];
338 argv[bottom + i] =
339 argv[top - (middle - bottom) + i];
340 argv[top - (middle - bottom) + i] = tem;
341 SWAP_FLAGS(bottom + i,
342 top - (middle - bottom) + i);
343 }
344 /* Exclude the moved bottom segment from further
345 * swapping. */
346 top -= len;
347 } else {
348 /* Top segment is the short one. */
349 int len = top - middle;
350 register int i;
351
352 /* Swap it with the bottom part of the bottom segment.
353 */
354 for (i = 0; i < len; i++) {
355 tem = argv[bottom + i];
356 argv[bottom + i] = argv[middle + i];
357 argv[middle + i] = tem;
358 SWAP_FLAGS(bottom + i, middle + i);
359 }
360 /* Exclude the moved top segment from further swapping.
361 */
362 bottom += len;
363 }
364 }
365
366 /* Update records for the slots the non-options now occupy. */
367
368 first_nonopt += (optind - last_nonopt);
369 last_nonopt = optind;
370 }
371
372 /* Initialize the internal data when the first call is made. */
373
374 #if defined __STDC__ && __STDC__
375 static const char *_getopt_initialize(int, char *const *, const char *);
376 #endif
377 static const char *_getopt_initialize(argc, argv, optstring) int argc;
378 char *const *argv;
379 const char *optstring;
380 {
381 /* Start processing options with ARGV-element 1 (since ARGV-element 0
382 is the program name); the sequence of previously skipped
383 non-option ARGV-elements is empty. */
384
385 first_nonopt = last_nonopt = optind;
386
387 nextchar = NULL;
388
389 posixly_correct = getenv("POSIXLY_CORRECT");
390
391 /* Determine how to handle the ordering of options and nonoptions. */
392
393 if (optstring[0] == '-') {
394 ordering = RETURN_IN_ORDER;
395 ++optstring;
396 } else if (optstring[0] == '+') {
397 ordering = REQUIRE_ORDER;
398 ++optstring;
399 } else if (posixly_correct != NULL)
400 ordering = REQUIRE_ORDER;
401 else
402 ordering = PERMUTE;
403
404 #ifdef _LIBC
405 if (posixly_correct == NULL && argc == original_argc
406 && argv == original_argv) {
407 if (nonoption_flags_max_len == 0) {
408 if (__getopt_nonoption_flags == NULL
409 || __getopt_nonoption_flags[0] == '\0')
410 nonoption_flags_max_len = -1;
411 else {
412 const char *orig_str = __getopt_nonoption_flags;
413 int len = nonoption_flags_max_len =
414 strlen(orig_str);
415 if (nonoption_flags_max_len < argc)
416 nonoption_flags_max_len = argc;
417 __getopt_nonoption_flags =
418 (char *)malloc(nonoption_flags_max_len);
419 if (__getopt_nonoption_flags == NULL)
420 nonoption_flags_max_len = -1;
421 else
422 memset(__mempcpy(
423 __getopt_nonoption_flags,
424 orig_str, len),
425 '\0',
426 nonoption_flags_max_len - len);
427 }
428 }
429 nonoption_flags_len = nonoption_flags_max_len;
430 } else
431 nonoption_flags_len = 0;
432 #endif
433
434 return optstring;
435 }
436
437 /* Scan elements of ARGV (whose length is ARGC) for option characters
438 given in OPTSTRING.
439
440 If an element of ARGV starts with '-', and is not exactly "-" or "--",
441 then it is an option element. The characters of this element
442 (aside from the initial '-') are option characters. If `getopt'
443 is called repeatedly, it returns successively each of the option characters
444 from each of the option elements.
445
446 If `getopt' finds another option character, it returns that character,
447 updating `optind' and `nextchar' so that the next call to `getopt' can
448 resume the scan with the following option character or ARGV-element.
449
450 If there are no more option characters, `getopt' returns -1.
451 Then `optind' is the index in ARGV of the first ARGV-element
452 that is not an option. (The ARGV-elements have been permuted
453 so that those that are not options now come last.)
454
455 OPTSTRING is a string containing the legitimate option characters.
456 If an option character is seen that is not listed in OPTSTRING,
457 return '?' after printing an error message. If you set `opterr' to
458 zero, the error message is suppressed but we still return '?'.
459
460 If a char in OPTSTRING is followed by a colon, that means it wants an arg,
461 so the following text in the same ARGV-element, or the text of the following
462 ARGV-element, is returned in `optarg'. Two colons mean an option that
463 wants an optional arg; if there is text in the current ARGV-element,
464 it is returned in `optarg', otherwise `optarg' is set to zero.
465
466 If OPTSTRING starts with `-' or `+', it requests different methods of
467 handling the non-option ARGV-elements.
468 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
469
470 Long-named options begin with `--' instead of `-'.
471 Their names may be abbreviated as long as the abbreviation is unique
472 or is an exact match for some defined option. If they have an
473 argument, it follows the option name in the same ARGV-element, separated
474 from the option name by a `=', or else the in next ARGV-element.
475 When `getopt' finds a long-named option, it returns 0 if that option's
476 `flag' field is nonzero, the value of the option's `val' field
477 if the `flag' field is zero.
478
479 The elements of ARGV aren't really const, because we permute them.
480 But we pretend they're const in the prototype to be compatible
481 with other systems.
482
483 LONGOPTS is a vector of `struct option' terminated by an
484 element containing a name which is zero.
485
486 LONGIND returns the index in LONGOPT of the long-named option found.
487 It is only valid when a long-named option has been found by the most
488 recent call.
489
490 If LONG_ONLY is nonzero, '-' as well as '--' can introduce
491 long-named options. */
492
493 int _getopt_internal(argc, argv, optstring, longopts, longind,
494 long_only) int argc;
495 char *const *argv;
496 const char *optstring;
497 const struct option *longopts;
498 int *longind;
499 int long_only;
500 {
501 optarg = NULL;
502
503 if (optind == 0 || !__getopt_initialized) {
504 if (optind == 0)
505 optind = 1; /* Don't scan ARGV[0], the program name. */
506 optstring = _getopt_initialize(argc, argv, optstring);
507 __getopt_initialized = 1;
508 }
509
510 /* Test whether ARGV[optind] points to a non-option argument.
511 Either it does not have option syntax, or there is an environment flag
512 from the shell indicating it is not an option. The later information
513 is only used when the used in the GNU libc. */
514 #ifdef _LIBC
515 #define NONOPTION_P \
516 (argv[optind][0] != '-' || argv[optind][1] == '\0' \
517 || (optind < nonoption_flags_len \
518 && __getopt_nonoption_flags[optind] == '1'))
519 #else
520 # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0')
521 #endif
522
523 if (nextchar == NULL || *nextchar == '\0') {
524 /* Advance to the next ARGV-element. */
525
526 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has
527 been
528 moved back by the user (who may also have changed the
529 arguments). */
530 if (last_nonopt > optind)
531 last_nonopt = optind;
532 if (first_nonopt > optind)
533 first_nonopt = optind;
534
535 if (ordering == PERMUTE) {
536 /* If we have just processed some options following some
537 non-options,
538 exchange them so that the options come first. */
539
540 if (first_nonopt != last_nonopt
541 && last_nonopt != optind)
542 exchange((char **)argv);
543 else if (last_nonopt != optind)
544 first_nonopt = optind;
545
546 /* Skip any additional non-options
547 and extend the range of non-options previously
548 skipped. */
549
550 while (optind < argc && NONOPTION_P)
551 optind++;
552 last_nonopt = optind;
553 }
554
555 /* The special ARGV-element `--' means premature end of options.
556 Skip it like a null option,
557 then exchange with previous non-options as if it were an
558 option,
559 then skip everything else like a non-option. */
560
561 if (optind != argc && !strcmp(argv[optind], "--")) {
562 optind++;
563
564 if (first_nonopt != last_nonopt
565 && last_nonopt != optind)
566 exchange((char **)argv);
567 else if (first_nonopt == last_nonopt)
568 first_nonopt = optind;
569 last_nonopt = argc;
570
571 optind = argc;
572 }
573
574 /* If we have done all the ARGV-elements, stop the scan
575 and back over any non-options that we skipped and permuted.
576 */
577
578 if (optind == argc) {
579 /* Set the next-arg-index to point at the non-options
580 that we previously skipped, so the caller will digest
581 them. */
582 if (first_nonopt != last_nonopt)
583 optind = first_nonopt;
584 return -1;
585 }
586
587 /* If we have come to a non-option and did not permute it,
588 either stop the scan or describe it to the caller and pass it
589 by. */
590
591 if (NONOPTION_P) {
592 if (ordering == REQUIRE_ORDER)
593 return -1;
594 optarg = argv[optind++];
595 return 1;
596 }
597
598 /* We have found another option-ARGV-element.
599 Skip the initial punctuation. */
600
601 nextchar = (argv[optind] + 1
602 + (longopts != NULL && argv[optind][1] == '-'));
603 }
604
605 /* Decode the current option-ARGV-element. */
606
607 /* Check whether the ARGV-element is a long option.
608
609 If long_only and the ARGV-element has the form "-f", where f is
610 a valid short option, don't consider it an abbreviated form of
611 a long option that starts with f. Otherwise there would be no
612 way to give the -f short option.
613
614 On the other hand, if there's a long option "fubar" and
615 the ARGV-element is "-fu", do consider that an abbreviation of
616 the long option, just like "--fu", and not "-f" with arg "u".
617
618 This distinction seems to be the most useful approach. */
619
620 if (longopts != NULL
621 && (argv[optind][1] == '-'
622 || (long_only && (argv[optind][2]
623 || !my_index(optstring, argv[optind][1]))))) {
624 char *nameend;
625 const struct option *p;
626 const struct option *pfound = NULL;
627 int exact = 0;
628 int ambig = 0;
629 int indfound = -1;
630 int option_index;
631
632 for (nameend = nextchar; *nameend && *nameend != '='; nameend++)
633 /* Do nothing. */;
634
635 /* Test all long options for either exact match
636 or abbreviated matches. */
637 for (p = longopts, option_index = 0; p->name;
638 p++, option_index++)
639 if (!strncmp(p->name, nextchar, nameend - nextchar)) {
640 if ((unsigned int)(nameend - nextchar)
641 == (unsigned int)strlen(p->name)) {
642 /* Exact match found. */
643 pfound = p;
644 indfound = option_index;
645 exact = 1;
646 break;
647 } else if (pfound == NULL) {
648 /* First nonexact match found. */
649 pfound = p;
650 indfound = option_index;
651 } else
652 /* Second or later nonexact match found.
653 */
654 ambig = 1;
655 }
656
657 if (ambig && !exact) {
658 if (opterr)
659 fprintf(stderr,
660 _("%s: option `%s' is ambiguous\n"),
661 argv[0], argv[optind]);
662 nextchar += strlen(nextchar);
663 optind++;
664 optopt = 0;
665 return '?';
666 }
667
668 if (pfound != NULL) {
669 option_index = indfound;
670 optind++;
671 if (*nameend) {
672 /* Don't test has_arg with >, because some C
673 compilers don't
674 allow it to be used on enums. */
675 if (pfound->has_arg)
676 optarg = nameend + 1;
677 else {
678 if (opterr) {
679 if (argv[optind - 1][1] == '-')
680 /* --option */
681 fprintf(stderr,
682 _("%s: option `--%s' doesn't allow an argument\n"),
683 argv[0],
684 pfound->name);
685 else
686 /* +option or -option */
687 fprintf(stderr,
688 _("%s: option `%c%s' doesn't allow an argument\n"),
689 argv[0],
690 argv[optind - 1]
691 [0],
692 pfound->name);
693 }
694
695 nextchar += strlen(nextchar);
696
697 optopt = pfound->val;
698 return '?';
699 }
700 } else if (pfound->has_arg == 1) {
701 if (optind < argc)
702 optarg = argv[optind++];
703 else {
704 if (opterr)
705 fprintf(stderr,
706 _("%s: option `%s' requires an argument\n"),
707 argv[0],
708 argv[optind - 1]);
709 nextchar += strlen(nextchar);
710 optopt = pfound->val;
711 return optstring[0] == ':' ? ':' : '?';
712 }
713 }
714 nextchar += strlen(nextchar);
715 if (longind != NULL)
716 *longind = option_index;
717 if (pfound->flag) {
718 *(pfound->flag) = pfound->val;
719 return 0;
720 }
721 return pfound->val;
722 }
723
724 /* Can't find it as a long option. If this is not
725 getopt_long_only,
726 or the option starts with '--' or is not a valid short
727 option, then it's an error.
728 Otherwise interpret it as a short option. */
729 if (!long_only || argv[optind][1] == '-'
730 || my_index(optstring, *nextchar) == NULL) {
731 if (opterr) {
732 if (argv[optind][1] == '-')
733 /* --option */
734 fprintf(stderr,
735 _("%s: unrecognized option `--%s'\n"),
736 argv[0], nextchar);
737 else
738 /* +option or -option */
739 fprintf(stderr,
740 _("%s: unrecognized option `%c%s'\n"),
741 argv[0], argv[optind][0],
742 nextchar);
743 }
744 nextchar = (char *)"";
745 optind++;
746 optopt = 0;
747 return '?';
748 }
749 }
750
751 /* Look at and handle the next short option-character. */
752
753 {
754 char c = *nextchar++;
755 char *temp = my_index(optstring, c);
756
757 /* Increment `optind' when we start to process its last
758 * character. */
759 if (*nextchar == '\0')
760 ++optind;
761
762 if (temp == NULL || c == ':') {
763 if (opterr) {
764 if (posixly_correct)
765 /* 1003.2 specifies the format of this
766 * message. */
767 fprintf(stderr,
768 _("%s: illegal option -- %c\n"),
769 argv[0], c);
770 else
771 fprintf(stderr,
772 _("%s: invalid option -- %c\n"),
773 argv[0], c);
774 }
775 optopt = c;
776 return '?';
777 }
778 /* Convenience. Treat POSIX -W foo same as long option --foo */
779 if (temp[0] == 'W' && temp[1] == ';') {
780 char *nameend;
781 const struct option *p;
782 const struct option *pfound = NULL;
783 int exact = 0;
784 int ambig = 0;
785 int indfound = 0;
786 int option_index;
787
788 /* This is an option that requires an argument. */
789 if (*nextchar != '\0') {
790 optarg = nextchar;
791 /* If we end this ARGV-element by taking the
792 rest as an arg,
793 we must advance to the next element now. */
794 optind++;
795 } else if (optind == argc) {
796 if (opterr) {
797 /* 1003.2 specifies the format of this
798 * message. */
799 fprintf(stderr,
800 _("%s: option requires an argument -- %c\n"),
801 argv[0], c);
802 }
803 optopt = c;
804 if (optstring[0] == ':')
805 c = ':';
806 else
807 c = '?';
808 return c;
809 } else
810 /* We already incremented `optind' once;
811 increment it again when taking next ARGV-elt
812 as argument. */
813 optarg = argv[optind++];
814
815 /* optarg is now the argument, see if it's in the
816 table of longopts. */
817
818 for (nextchar = nameend = optarg;
819 *nameend && *nameend != '='; nameend++)
820 /* Do nothing. */;
821
822 /* Test all long options for either exact match
823 or abbreviated matches. */
824 for (p = longopts, option_index = 0; p->name;
825 p++, option_index++)
826 if (!strncmp(p->name, nextchar,
827 nameend - nextchar)) {
828 if ((unsigned int)(nameend - nextchar)
829 == strlen(p->name)) {
830 /* Exact match found. */
831 pfound = p;
832 indfound = option_index;
833 exact = 1;
834 break;
835 } else if (pfound == NULL) {
836 /* First nonexact match found.
837 */
838 pfound = p;
839 indfound = option_index;
840 } else
841 /* Second or later nonexact
842 * match found. */
843 ambig = 1;
844 }
845 if (ambig && !exact) {
846 if (opterr)
847 fprintf(stderr,
848 _("%s: option `-W %s' is ambiguous\n"),
849 argv[0], argv[optind]);
850 nextchar += strlen(nextchar);
851 optind++;
852 return '?';
853 }
854 if (pfound != NULL) {
855 option_index = indfound;
856 if (*nameend) {
857 /* Don't test has_arg with >, because
858 some C compilers don't
859 allow it to be used on enums. */
860 if (pfound->has_arg)
861 optarg = nameend + 1;
862 else {
863 if (opterr)
864 fprintf(stderr, _("\
865 %s: option `-W %s' doesn't allow an argument\n"),
866 argv[0],
867 pfound->name);
868
869 nextchar += strlen(nextchar);
870 return '?';
871 }
872 } else if (pfound->has_arg == 1) {
873 if (optind < argc)
874 optarg = argv[optind++];
875 else {
876 if (opterr)
877 fprintf(stderr,
878 _("%s: option `%s' requires an argument\n"),
879 argv[0],
880 argv[optind
881 - 1]);
882 nextchar += strlen(nextchar);
883 return optstring[0] == ':'
884 ? ':'
885 : '?';
886 }
887 }
888 nextchar += strlen(nextchar);
889 if (longind != NULL)
890 *longind = option_index;
891 if (pfound->flag) {
892 *(pfound->flag) = pfound->val;
893 return 0;
894 }
895 return pfound->val;
896 }
897 nextchar = NULL;
898 return 'W'; /* Let the application handle it. */
899 }
900 if (temp[1] == ':') {
901 if (temp[2] == ':') {
902 /* This is an option that accepts an argument
903 * optionally. */
904 if (*nextchar != '\0') {
905 optarg = nextchar;
906 optind++;
907 } else
908 optarg = NULL;
909 nextchar = NULL;
910 } else {
911 /* This is an option that requires an argument.
912 */
913 if (*nextchar != '\0') {
914 optarg = nextchar;
915 /* If we end this ARGV-element by taking
916 the rest as an arg,
917 we must advance to the next element
918 now. */
919 optind++;
920 } else if (optind == argc) {
921 if (opterr) {
922 /* 1003.2 specifies the format
923 * of this message. */
924 fprintf(stderr,
925 _("%s: option requires an argument -- %c\n"),
926 argv[0], c);
927 }
928 optopt = c;
929 if (optstring[0] == ':')
930 c = ':';
931 else
932 c = '?';
933 } else
934 /* We already incremented `optind' once;
935 increment it again when taking next
936 ARGV-elt as argument. */
937 optarg = argv[optind++];
938 nextchar = NULL;
939 }
940 }
941 return c;
942 }
943 }
944
945 #ifdef REALLY_NEED_PLAIN_GETOPT
946
947 int getopt(argc, argv, optstring) int argc;
948 char *const *argv;
949 const char *optstring;
950 {
951 return _getopt_internal(argc, argv, optstring, (const struct option *)0,
952 (int *)0, 0);
953 }
954
955 #endif /* REALLY_NEED_PLAIN_GETOPT */
956
957 #endif /* Not ELIDE_CODE. */
958
959 #ifdef TEST
960
961 /* Compile with -DTEST to make an executable for use in testing
962 the above definition of `getopt'. */
963
964 int main(argc, argv) int argc;
965 char **argv;
966 {
967 int c;
968 int digit_optind = 0;
969
970 while (1) {
971 int this_option_optind = optind ? optind : 1;
972
973 c = getopt(argc, argv, "abc:d:0123456789");
974 if (c == -1)
975 break;
976
977 switch (c) {
978 case '0':
979 case '1':
980 case '2':
981 case '3':
982 case '4':
983 case '5':
984 case '6':
985 case '7':
986 case '8':
987 case '9':
988 if (digit_optind != 0
989 && digit_optind != this_option_optind)
990 printf("digits occur in two different argv-elements.\n");
991 digit_optind = this_option_optind;
992 printf("option %c\n", c);
993 break;
994
995 case 'a':
996 printf("option a\n");
997 break;
998
999 case 'b':
1000 printf("option b\n");
1001 break;
1002
1003 case 'c':
1004 printf("option c with value `%s'\n", optarg);
1005 break;
1006
1007 case '?':
1008 break;
1009
1010 default:
1011 printf("?? getopt returned character code 0%o ??\n", c);
1012 }
1013 }
1014
1015 if (optind < argc) {
1016 printf("non-option ARGV-elements: ");
1017 while (optind < argc)
1018 printf("%s ", argv[optind++]);
1019 printf("\n");
1020 }
1021
1022 exit(0);
1023 }
1024
1025 #endif /* TEST */
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