]> git.proxmox.com Git - mirror_frr.git/blob - lib/getopt.c
projects / mirror_frr.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
doc: Add `show ipv6 rpf X:X::X:X` command to docs
[mirror_frr.git] / lib / getopt.c
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(const char *);
210 #endif
211
212 static char *my_index(const char *str, int chr)
213 {
214 while (*str) {
215 if (*str == chr)
216 return (char *)str;
217 str++;
218 }
219 return 0;
220 }
221
222 /* If using GCC, we can safely declare strlen this way.
223 If not using GCC, it is ok not to declare it. */
224 #ifdef __GNUC__
225 /* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h.
226 That was relevant to code that was here before. */
227 #if (!defined __STDC__ || !__STDC__) && !defined strlen
228 /* gcc with -traditional declares the built-in strlen to return int,
229 and has done so at least since version 2.4.5. -- rms. */
230 extern int strlen(const char *);
231 #endif /* not __STDC__ */
232 #endif /* __GNUC__ */
233
234 #endif /* not __GNU_LIBRARY__ */
235
236 /* Handle permutation of arguments. */
237
238 /* Describe the part of ARGV that contains non-options that have
239 been skipped. `first_nonopt' is the index in ARGV of the first of them;
240 `last_nonopt' is the index after the last of them. */
241
242 static int first_nonopt;
243 static int last_nonopt;
244
245 #ifdef _LIBC
246 /* Bash 2.0 gives us an environment variable containing flags
247 indicating ARGV elements that should not be considered arguments. */
248
249 /* Defined in getopt_init.c */
250 extern char *__getopt_nonoption_flags;
251
252 static int nonoption_flags_max_len;
253 static int nonoption_flags_len;
254
255 static int original_argc;
256 static char *const *original_argv;
257
258 /* Make sure the environment variable bash 2.0 puts in the environment
259 is valid for the getopt call we must make sure that the ARGV passed
260 to getopt is that one passed to the process. */
261 static void __attribute__((unused))
262 store_args_and_env(int argc, char *const *argv)
263 {
264 /* XXX This is no good solution. We should rather copy the args so
265 that we can compare them later. But we must not use malloc(3). */
266 original_argc = argc;
267 original_argv = argv;
268 }
269 #ifdef text_set_element
270 text_set_element(__libc_subinit, store_args_and_env);
271 #endif /* text_set_element */
272
273 #define SWAP_FLAGS(ch1, ch2) \
274 if (nonoption_flags_len > 0) { \
275 char __tmp = __getopt_nonoption_flags[ch1]; \
276 __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \
277 __getopt_nonoption_flags[ch2] = __tmp; \
278 }
279 #else /* !_LIBC */
280 # define SWAP_FLAGS(ch1, ch2)
281 #endif /* _LIBC */
282
283 /* Exchange two adjacent subsequences of ARGV.
284 One subsequence is elements [first_nonopt,last_nonopt)
285 which contains all the non-options that have been skipped so far.
286 The other is elements [last_nonopt,optind), which contains all
287 the options processed since those non-options were skipped.
288
289 `first_nonopt' and `last_nonopt' are relocated so that they describe
290 the new indices of the non-options in ARGV after they are moved. */
291
292 #if defined __STDC__ && __STDC__
293 static void exchange(char **);
294 #endif
295
296 static void exchange(argv) char **argv;
297 {
298 int bottom = first_nonopt;
299 int middle = last_nonopt;
300 int top = optind;
301 char *tem;
302
303 /* Exchange the shorter segment with the far end of the longer segment.
304 That puts the shorter segment into the right place.
305 It leaves the longer segment in the right place overall,
306 but it consists of two parts that need to be swapped next. */
307
308 #ifdef _LIBC
309 /* First make sure the handling of the `__getopt_nonoption_flags'
310 string can work normally. Our top argument must be in the range
311 of the string. */
312 if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len) {
313 /* We must extend the array. The user plays games with us and
314 presents new arguments. */
315 char *new_str = malloc(top + 1);
316 if (new_str == NULL)
317 nonoption_flags_len = nonoption_flags_max_len = 0;
318 else {
319 memset(__mempcpy(new_str, __getopt_nonoption_flags,
320 nonoption_flags_max_len),
321 '\0', top + 1 - nonoption_flags_max_len);
322 nonoption_flags_max_len = top + 1;
323 __getopt_nonoption_flags = new_str;
324 }
325 }
326 #endif
327
328 while (top > middle && middle > bottom) {
329 if (top - middle > middle - bottom) {
330 /* Bottom segment is the short one. */
331 int len = middle - bottom;
332 register int i;
333
334 /* Swap it with the top part of the top segment. */
335 for (i = 0; i < len; i++) {
336 tem = argv[bottom + i];
337 argv[bottom + i] =
338 argv[top - (middle - bottom) + i];
339 argv[top - (middle - bottom) + i] = tem;
340 SWAP_FLAGS(bottom + i,
341 top - (middle - bottom) + i);
342 }
343 /* Exclude the moved bottom segment from further
344 * swapping. */
345 top -= len;
346 } else {
347 /* Top segment is the short one. */
348 int len = top - middle;
349 register int i;
350
351 /* Swap it with the bottom part of the bottom segment.
352 */
353 for (i = 0; i < len; i++) {
354 tem = argv[bottom + i];
355 argv[bottom + i] = argv[middle + i];
356 argv[middle + i] = tem;
357 SWAP_FLAGS(bottom + i, middle + i);
358 }
359 /* Exclude the moved top segment from further swapping.
360 */
361 bottom += len;
362 }
363 }
364
365 /* Update records for the slots the non-options now occupy. */
366
367 first_nonopt += (optind - last_nonopt);
368 last_nonopt = optind;
369 }
370
371 /* Initialize the internal data when the first call is made. */
372
373 #if defined __STDC__ && __STDC__
374 static const char *_getopt_initialize(int, char *const *, const char *);
375 #endif
376 static const char *_getopt_initialize(argc, argv, optstring) int argc;
377 char *const *argv;
378 const char *optstring;
379 {
380 /* Start processing options with ARGV-element 1 (since ARGV-element 0
381 is the program name); the sequence of previously skipped
382 non-option ARGV-elements is empty. */
383
384 first_nonopt = last_nonopt = optind;
385
386 nextchar = NULL;
387
388 posixly_correct = getenv("POSIXLY_CORRECT");
389
390 /* Determine how to handle the ordering of options and nonoptions. */
391
392 if (optstring[0] == '-') {
393 ordering = RETURN_IN_ORDER;
394 ++optstring;
395 } else if (optstring[0] == '+') {
396 ordering = REQUIRE_ORDER;
397 ++optstring;
398 } else if (posixly_correct != NULL)
399 ordering = REQUIRE_ORDER;
400 else
401 ordering = PERMUTE;
402
403 #ifdef _LIBC
404 if (posixly_correct == NULL && argc == original_argc
405 && argv == original_argv) {
406 if (nonoption_flags_max_len == 0) {
407 if (__getopt_nonoption_flags == NULL
408 || __getopt_nonoption_flags[0] == '\0')
409 nonoption_flags_max_len = -1;
410 else {
411 const char *orig_str = __getopt_nonoption_flags;
412 int len = nonoption_flags_max_len =
413 strlen(orig_str);
414 if (nonoption_flags_max_len < argc)
415 nonoption_flags_max_len = argc;
416 __getopt_nonoption_flags =
417 (char *)malloc(nonoption_flags_max_len);
418 if (__getopt_nonoption_flags == NULL)
419 nonoption_flags_max_len = -1;
420 else
421 memset(__mempcpy(
422 __getopt_nonoption_flags,
423 orig_str, len),
424 '\0',
425 nonoption_flags_max_len - len);
426 }
427 }
428 nonoption_flags_len = nonoption_flags_max_len;
429 } else
430 nonoption_flags_len = 0;
431 #endif
432
433 return optstring;
434 }
435
436 /* Scan elements of ARGV (whose length is ARGC) for option characters
437 given in OPTSTRING.
438
439 If an element of ARGV starts with '-', and is not exactly "-" or "--",
440 then it is an option element. The characters of this element
441 (aside from the initial '-') are option characters. If `getopt'
442 is called repeatedly, it returns successively each of the option characters
443 from each of the option elements.
444
445 If `getopt' finds another option character, it returns that character,
446 updating `optind' and `nextchar' so that the next call to `getopt' can
447 resume the scan with the following option character or ARGV-element.
448
449 If there are no more option characters, `getopt' returns -1.
450 Then `optind' is the index in ARGV of the first ARGV-element
451 that is not an option. (The ARGV-elements have been permuted
452 so that those that are not options now come last.)
453
454 OPTSTRING is a string containing the legitimate option characters.
455 If an option character is seen that is not listed in OPTSTRING,
456 return '?' after printing an error message. If you set `opterr' to
457 zero, the error message is suppressed but we still return '?'.
458
459 If a char in OPTSTRING is followed by a colon, that means it wants an arg,
460 so the following text in the same ARGV-element, or the text of the following
461 ARGV-element, is returned in `optarg'. Two colons mean an option that
462 wants an optional arg; if there is text in the current ARGV-element,
463 it is returned in `optarg', otherwise `optarg' is set to zero.
464
465 If OPTSTRING starts with `-' or `+', it requests different methods of
466 handling the non-option ARGV-elements.
467 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
468
469 Long-named options begin with `--' instead of `-'.
470 Their names may be abbreviated as long as the abbreviation is unique
471 or is an exact match for some defined option. If they have an
472 argument, it follows the option name in the same ARGV-element, separated
473 from the option name by a `=', or else the in next ARGV-element.
474 When `getopt' finds a long-named option, it returns 0 if that option's
475 `flag' field is nonzero, the value of the option's `val' field
476 if the `flag' field is zero.
477
478 The elements of ARGV aren't really const, because we permute them.
479 But we pretend they're const in the prototype to be compatible
480 with other systems.
481
482 LONGOPTS is a vector of `struct option' terminated by an
483 element containing a name which is zero.
484
485 LONGIND returns the index in LONGOPT of the long-named option found.
486 It is only valid when a long-named option has been found by the most
487 recent call.
488
489 If LONG_ONLY is nonzero, '-' as well as '--' can introduce
490 long-named options. */
491
492 int _getopt_internal(argc, argv, optstring, longopts, longind,
493 long_only) int argc;
494 char *const *argv;
495 const char *optstring;
496 const struct option *longopts;
497 int *longind;
498 int long_only;
499 {
500 optarg = NULL;
501
502 if (optind == 0 || !__getopt_initialized) {
503 if (optind == 0)
504 optind = 1; /* Don't scan ARGV[0], the program name. */
505 optstring = _getopt_initialize(argc, argv, optstring);
506 __getopt_initialized = 1;
507 }
508
509 /* Test whether ARGV[optind] points to a non-option argument.
510 Either it does not have option syntax, or there is an environment flag
511 from the shell indicating it is not an option. The later information
512 is only used when the used in the GNU libc. */
513 #ifdef _LIBC
514 #define NONOPTION_P \
515 (argv[optind][0] != '-' || argv[optind][1] == '\0' \
516 || (optind < nonoption_flags_len \
517 && __getopt_nonoption_flags[optind] == '1'))
518 #else
519 # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0')
520 #endif
521
522 if (nextchar == NULL || *nextchar == '\0') {
523 /* Advance to the next ARGV-element. */
524
525 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has
526 been
527 moved back by the user (who may also have changed the
528 arguments). */
529 if (last_nonopt > optind)
530 last_nonopt = optind;
531 if (first_nonopt > optind)
532 first_nonopt = optind;
533
534 if (ordering == PERMUTE) {
535 /* If we have just processed some options following some
536 non-options,
537 exchange them so that the options come first. */
538
539 if (first_nonopt != last_nonopt
540 && last_nonopt != optind)
541 exchange((char **)argv);
542 else if (last_nonopt != optind)
543 first_nonopt = optind;
544
545 /* Skip any additional non-options
546 and extend the range of non-options previously
547 skipped. */
548
549 while (optind < argc && NONOPTION_P)
550 optind++;
551 last_nonopt = optind;
552 }
553
554 /* The special ARGV-element `--' means premature end of options.
555 Skip it like a null option,
556 then exchange with previous non-options as if it were an
557 option,
558 then skip everything else like a non-option. */
559
560 if (optind != argc && !strcmp(argv[optind], "--")) {
561 optind++;
562
563 if (first_nonopt != last_nonopt
564 && last_nonopt != optind)
565 exchange((char **)argv);
566 else if (first_nonopt == last_nonopt)
567 first_nonopt = optind;
568 last_nonopt = argc;
569
570 optind = argc;
571 }
572
573 /* If we have done all the ARGV-elements, stop the scan
574 and back over any non-options that we skipped and permuted.
575 */
576
577 if (optind == argc) {
578 /* Set the next-arg-index to point at the non-options
579 that we previously skipped, so the caller will digest
580 them. */
581 if (first_nonopt != last_nonopt)
582 optind = first_nonopt;
583 return -1;
584 }
585
586 /* If we have come to a non-option and did not permute it,
587 either stop the scan or describe it to the caller and pass it
588 by. */
589
590 if (NONOPTION_P) {
591 if (ordering == REQUIRE_ORDER)
592 return -1;
593 optarg = argv[optind++];
594 return 1;
595 }
596
597 /* We have found another option-ARGV-element.
598 Skip the initial punctuation. */
599
600 nextchar = (argv[optind] + 1
601 + (longopts != NULL && argv[optind][1] == '-'));
602 }
603
604 /* Decode the current option-ARGV-element. */
605
606 /* Check whether the ARGV-element is a long option.
607
608 If long_only and the ARGV-element has the form "-f", where f is
609 a valid short option, don't consider it an abbreviated form of
610 a long option that starts with f. Otherwise there would be no
611 way to give the -f short option.
612
613 On the other hand, if there's a long option "fubar" and
614 the ARGV-element is "-fu", do consider that an abbreviation of
615 the long option, just like "--fu", and not "-f" with arg "u".
616
617 This distinction seems to be the most useful approach. */
618
619 if (longopts != NULL
620 && (argv[optind][1] == '-'
621 || (long_only && (argv[optind][2]
622 || !my_index(optstring, argv[optind][1]))))) {
623 char *nameend;
624 const struct option *p;
625 const struct option *pfound = NULL;
626 int exact = 0;
627 int ambig = 0;
628 int indfound = -1;
629 int option_index;
630
631 for (nameend = nextchar; *nameend && *nameend != '='; nameend++)
632 /* Do nothing. */;
633
634 /* Test all long options for either exact match
635 or abbreviated matches. */
636 for (p = longopts, option_index = 0; p->name;
637 p++, option_index++)
638 if (!strncmp(p->name, nextchar, nameend - nextchar)) {
639 if ((unsigned int)(nameend - nextchar)
640 == (unsigned int)strlen(p->name)) {
641 /* Exact match found. */
642 pfound = p;
643 indfound = option_index;
644 exact = 1;
645 break;
646 } else if (pfound == NULL) {
647 /* First nonexact match found. */
648 pfound = p;
649 indfound = option_index;
650 } else
651 /* Second or later nonexact match found.
652 */
653 ambig = 1;
654 }
655
656 if (ambig && !exact) {
657 if (opterr)
658 fprintf(stderr,
659 _("%s: option `%s' is ambiguous\n"),
660 argv[0], argv[optind]);
661 nextchar += strlen(nextchar);
662 optind++;
663 optopt = 0;
664 return '?';
665 }
666
667 if (pfound != NULL) {
668 option_index = indfound;
669 optind++;
670 if (*nameend) {
671 /* Don't test has_arg with >, because some C
672 compilers don't
673 allow it to be used on enums. */
674 if (pfound->has_arg)
675 optarg = nameend + 1;
676 else {
677 if (opterr) {
678 if (argv[optind - 1][1] == '-')
679 /* --option */
680 fprintf(stderr,
681 _("%s: option `--%s' doesn't allow an argument\n"),
682 argv[0],
683 pfound->name);
684 else
685 /* +option or -option */
686 fprintf(stderr,
687 _("%s: option `%c%s' doesn't allow an argument\n"),
688 argv[0],
689 argv[optind - 1]
690 [0],
691 pfound->name);
692 }
693
694 nextchar += strlen(nextchar);
695
696 optopt = pfound->val;
697 return '?';
698 }
699 } else if (pfound->has_arg == 1) {
700 if (optind < argc)
701 optarg = argv[optind++];
702 else {
703 if (opterr)
704 fprintf(stderr,
705 _("%s: option `%s' requires an argument\n"),
706 argv[0],
707 argv[optind - 1]);
708 nextchar += strlen(nextchar);
709 optopt = pfound->val;
710 return optstring[0] == ':' ? ':' : '?';
711 }
712 }
713 nextchar += strlen(nextchar);
714 if (longind != NULL)
715 *longind = option_index;
716 if (pfound->flag) {
717 *(pfound->flag) = pfound->val;
718 return 0;
719 }
720 return pfound->val;
721 }
722
723 /* Can't find it as a long option. If this is not
724 getopt_long_only,
725 or the option starts with '--' or is not a valid short
726 option, then it's an error.
727 Otherwise interpret it as a short option. */
728 if (!long_only || argv[optind][1] == '-'
729 || my_index(optstring, *nextchar) == NULL) {
730 if (opterr) {
731 if (argv[optind][1] == '-')
732 /* --option */
733 fprintf(stderr,
734 _("%s: unrecognized option `--%s'\n"),
735 argv[0], nextchar);
736 else
737 /* +option or -option */
738 fprintf(stderr,
739 _("%s: unrecognized option `%c%s'\n"),
740 argv[0], argv[optind][0],
741 nextchar);
742 }
743 nextchar = (char *)"";
744 optind++;
745 optopt = 0;
746 return '?';
747 }
748 }
749
750 /* Look at and handle the next short option-character. */
751
752 {
753 char c = *nextchar++;
754 char *temp = my_index(optstring, c);
755
756 /* Increment `optind' when we start to process its last
757 * character. */
758 if (*nextchar == '\0')
759 ++optind;
760
761 if (temp == NULL || c == ':') {
762 if (opterr) {
763 if (posixly_correct)
764 /* 1003.2 specifies the format of this
765 * message. */
766 fprintf(stderr,
767 _("%s: illegal option -- %c\n"),
768 argv[0], c);
769 else
770 fprintf(stderr,
771 _("%s: invalid option -- %c\n"),
772 argv[0], c);
773 }
774 optopt = c;
775 return '?';
776 }
777 /* Convenience. Treat POSIX -W foo same as long option --foo */
778 if (temp[0] == 'W' && temp[1] == ';') {
779 char *nameend;
780 const struct option *p;
781 const struct option *pfound = NULL;
782 int exact = 0;
783 int ambig = 0;
784 int indfound = 0;
785 int option_index;
786
787 /* This is an option that requires an argument. */
788 if (*nextchar != '\0') {
789 optarg = nextchar;
790 /* If we end this ARGV-element by taking the
791 rest as an arg,
792 we must advance to the next element now. */
793 optind++;
794 } else if (optind == argc) {
795 if (opterr) {
796 /* 1003.2 specifies the format of this
797 * message. */
798 fprintf(stderr,
799 _("%s: option requires an argument -- %c\n"),
800 argv[0], c);
801 }
802 optopt = c;
803 if (optstring[0] == ':')
804 c = ':';
805 else
806 c = '?';
807 return c;
808 } else
809 /* We already incremented `optind' once;
810 increment it again when taking next ARGV-elt
811 as argument. */
812 optarg = argv[optind++];
813
814 /* optarg is now the argument, see if it's in the
815 table of longopts. */
816
817 for (nextchar = nameend = optarg;
818 *nameend && *nameend != '='; nameend++)
819 /* Do nothing. */;
820
821 /* Test all long options for either exact match
822 or abbreviated matches. */
823 for (p = longopts, option_index = 0; p->name;
824 p++, option_index++)
825 if (!strncmp(p->name, nextchar,
826 nameend - nextchar)) {
827 if ((unsigned int)(nameend - nextchar)
828 == strlen(p->name)) {
829 /* Exact match found. */
830 pfound = p;
831 indfound = option_index;
832 exact = 1;
833 break;
834 } else if (pfound == NULL) {
835 /* First nonexact match found.
836 */
837 pfound = p;
838 indfound = option_index;
839 } else
840 /* Second or later nonexact
841 * match found. */
842 ambig = 1;
843 }
844 if (ambig && !exact) {
845 if (opterr)
846 fprintf(stderr,
847 _("%s: option `-W %s' is ambiguous\n"),
848 argv[0], argv[optind]);
849 nextchar += strlen(nextchar);
850 optind++;
851 return '?';
852 }
853 if (pfound != NULL) {
854 option_index = indfound;
855 if (*nameend) {
856 /* Don't test has_arg with >, because
857 some C compilers don't
858 allow it to be used on enums. */
859 if (pfound->has_arg)
860 optarg = nameend + 1;
861 else {
862 if (opterr)
863 fprintf(stderr, _("\
864 %s: option `-W %s' doesn't allow an argument\n"),
865 argv[0],
866 pfound->name);
867
868 nextchar += strlen(nextchar);
869 return '?';
870 }
871 } else if (pfound->has_arg == 1) {
872 if (optind < argc)
873 optarg = argv[optind++];
874 else {
875 if (opterr)
876 fprintf(stderr,
877 _("%s: option `%s' requires an argument\n"),
878 argv[0],
879 argv[optind
880 - 1]);
881 nextchar += strlen(nextchar);
882 return optstring[0] == ':'
883 ? ':'
884 : '?';
885 }
886 }
887 nextchar += strlen(nextchar);
888 if (longind != NULL)
889 *longind = option_index;
890 if (pfound->flag) {
891 *(pfound->flag) = pfound->val;
892 return 0;
893 }
894 return pfound->val;
895 }
896 nextchar = NULL;
897 return 'W'; /* Let the application handle it. */
898 }
899 if (temp[1] == ':') {
900 if (temp[2] == ':') {
901 /* This is an option that accepts an argument
902 * optionally. */
903 if (*nextchar != '\0') {
904 optarg = nextchar;
905 optind++;
906 } else
907 optarg = NULL;
908 nextchar = NULL;
909 } else {
910 /* This is an option that requires an argument.
911 */
912 if (*nextchar != '\0') {
913 optarg = nextchar;
914 /* If we end this ARGV-element by taking
915 the rest as an arg,
916 we must advance to the next element
917 now. */
918 optind++;
919 } else if (optind == argc) {
920 if (opterr) {
921 /* 1003.2 specifies the format
922 * of this message. */
923 fprintf(stderr,
924 _("%s: option requires an argument -- %c\n"),
925 argv[0], c);
926 }
927 optopt = c;
928 if (optstring[0] == ':')
929 c = ':';
930 else
931 c = '?';
932 } else
933 /* We already incremented `optind' once;
934 increment it again when taking next
935 ARGV-elt as argument. */
936 optarg = argv[optind++];
937 nextchar = NULL;
938 }
939 }
940 return c;
941 }
942 }
943
944 #ifdef REALLY_NEED_PLAIN_GETOPT
945
946 int getopt(argc, argv, optstring) int argc;
947 char *const *argv;
948 const char *optstring;
949 {
950 return _getopt_internal(argc, argv, optstring, (const struct option *)0,
951 (int *)0, 0);
952 }
953
954 #endif /* REALLY_NEED_PLAIN_GETOPT */
955
956 #endif /* Not ELIDE_CODE. */
957
958 #ifdef TEST
959
960 /* Compile with -DTEST to make an executable for use in testing
961 the above definition of `getopt'. */
962
963 int main(argc, argv) int argc;
964 char **argv;
965 {
966 int c;
967 int digit_optind = 0;
968
969 while (1) {
970 int this_option_optind = optind ? optind : 1;
971
972 c = getopt(argc, argv, "abc:d:0123456789");
973 if (c == -1)
974 break;
975
976 switch (c) {
977 case '0':
978 case '1':
979 case '2':
980 case '3':
981 case '4':
982 case '5':
983 case '6':
984 case '7':
985 case '8':
986 case '9':
987 if (digit_optind != 0
988 && digit_optind != this_option_optind)
989 printf("digits occur in two different argv-elements.\n");
990 digit_optind = this_option_optind;
991 printf("option %c\n", c);
992 break;
993
994 case 'a':
995 printf("option a\n");
996 break;
997
998 case 'b':
999 printf("option b\n");
1000 break;
1001
1002 case 'c':
1003 printf("option c with value `%s'\n", optarg);
1004 break;
1005
1006 case '?':
1007 break;
1008
1009 default:
1010 printf("?? getopt returned character code 0%o ??\n", c);
1011 }
1012 }
1013
1014 if (optind < argc) {
1015 printf("non-option ARGV-elements: ");
1016 while (optind < argc)
1017 printf("%s ", argv[optind++]);
1018 printf("\n");
1019 }
1020
1021 exit(0);
1022 }
1023
1024 #endif /* TEST */
FRRouting mirror