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 roland@gnu.ai.mit.edu
4 before changing it!
6 Copyright (C) 1987, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97
7 Free Software Foundation, Inc.
9 This file is part of the GNU C Library. Its master source is NOT part of
10 the C library, however. The master source lives in /gd/gnu/lib.
12 The GNU C Library is free software; you can redistribute it and/or
13 modify it under the terms of the GNU Library General Public License as
14 published by the Free Software Foundation; either version 2 of the
15 License, or (at your option) any later version.
17 The GNU C Library 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 GNU
20 Library General Public License for more details.
22 You should have received a copy of the GNU Library General Public
23 License along with the GNU C Library; see the file COPYING.LIB. If not,
24 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
25 Boston, MA 02111-1307, USA. */
26 \f
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
34 #if !defined WIN32 && (!defined (__STDC__) || !__STDC__)
35 /* This is a separate conditional since some stdc systems
36 reject `defined (const)'. */
37 #ifndef const
38 #define const
39 #endif
40 #endif
42 #ifndef WIN32
43 #ifdef HAVE_CONFIG_H
44 #include "../rrd_config.h"
45 #endif
46 #endif
48 #include "rrd_i18n.h"
51 #include <stdio.h>
53 /* Comment out all this code if we are using the GNU C Library, and are not
54 actually compiling the library itself. This code is part of the GNU C
55 Library, but also included in many other GNU distributions. Compiling
56 and linking in this code is a waste when using the GNU C library
57 (especially if it is a shared library). Rather than having every GNU
58 program understand `configure --with-gnu-libc' and omit the object files,
59 it is simpler to just do this in the source for each such file. */
61 #define GETOPT_INTERFACE_VERSION 2
62 #if !defined (_LIBC) && defined (__GLIBC__) && __GLIBC__ >= 2
63 #include <gnu-versions.h>
64 #if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
65 #define ELIDE_CODE
66 #endif
67 #endif
69 #ifndef ELIDE_CODE
72 /* This needs to come after some library #include
73 to get __GNU_LIBRARY__ defined. */
74 #ifdef __GNU_LIBRARY__
75 /* Don't include stdlib.h for non-GNU C libraries because some of them
76 contain conflicting prototypes for getopt. */
77 #include <stdlib.h>
78 #include <unistd.h>
79 #endif /* GNU C library. */
81 #ifdef VMS
82 #include <unixlib.h>
83 #if HAVE_STRING_H - 0
84 #include <string.h>
85 #endif
86 #endif
88 #if defined (_WIN32) && !defined (__CYGWIN32__)
89 /* It's not Unix, really. See? Capital letters. */
90 #include <windows.h>
91 #define getpid() GetCurrentProcessId()
92 #endif
94 /* This version of `getopt' appears to the caller like standard Unix `getopt'
95 but it behaves differently for the user, since it allows the user
96 to intersperse the options with the other arguments.
98 As `getopt' works, it permutes the elements of ARGV so that,
99 when it is done, all the options precede everything else. Thus
100 all application programs are extended to handle flexible argument order.
102 Setting the environment variable POSIXLY_CORRECT disables permutation.
103 Then the behavior is completely standard.
105 GNU application programs can use a third alternative mode in which
106 they can distinguish the relative order of options and other arguments. */
108 #include "rrd_getopt.h"
110 /* For communication from `getopt' to the caller.
111 When `getopt' finds an option that takes an argument,
112 the argument value is returned here.
113 Also, when `ordering' is RETURN_IN_ORDER,
114 each non-option ARGV-element is returned here. */
116 /*
117 * On some versions of Solaris, opterr and friends are defined in core libc
118 * rather than in a separate getopt module. Define these variables only
119 * if configure found they aren't there by default. (We assume that testing
120 * opterr is sufficient for all of these except optreset.)
121 */
122 #ifndef HAVE_INT_OPTERR
124 char *optarg = NULL;
126 /* Index in ARGV of the next element to be scanned.
127 This is used for communication to and from the caller
128 and for communication between successive calls to `getopt'.
130 On entry to `getopt', zero means this is the first call; initialize.
132 When `getopt' returns -1, this is the index of the first of the
133 non-option elements that the caller should itself scan.
135 Otherwise, `optind' communicates from one call to the next
136 how much of ARGV has been scanned so far. */
138 /* Callers store zero here to inhibit the error message
139 for unrecognized options. */
141 int opterr = 1;
143 /* Set to an option character which was unrecognized.
144 This must be initialized on some systems to avoid linking in the
145 system's own getopt implementation. */
147 int optopt = '?';
149 /* 1003.2 says this must be 1 before any call. */
150 int optind = 1;
152 #else
153 extern int opterr;
154 extern int optind;
155 extern int optopt;
156 extern char *optarg;
157 #endif
160 /* Formerly, initialization of getopt depended on optind==0, which
161 causes problems with re-calling getopt as programs generally don't
162 know that. */
164 int __getopt_initialized = 0;
166 /* The next char to be scanned in the option-element
167 in which the last option character we returned was found.
168 This allows us to pick up the scan where we left off.
170 If this is zero, or a null string, it means resume the scan
171 by advancing to the next ARGV-element. */
173 static char *nextchar;
176 /* Describe how to deal with options that follow non-option ARGV-elements.
178 If the caller did not specify anything,
179 the default is REQUIRE_ORDER if the environment variable
180 POSIXLY_CORRECT is defined, PERMUTE otherwise.
182 REQUIRE_ORDER means don't recognize them as options;
183 stop option processing when the first non-option is seen.
184 This is what Unix does.
185 This mode of operation is selected by either setting the environment
186 variable POSIXLY_CORRECT, or using `+' as the first character
187 of the list of option characters.
189 PERMUTE is the default. We permute the contents of ARGV as we scan,
190 so that eventually all the non-options are at the end. This allows options
191 to be given in any order, even with programs that were not written to
192 expect this.
194 RETURN_IN_ORDER is an option available to programs that were written
195 to expect options and other ARGV-elements in any order and that care about
196 the ordering of the two. We describe each non-option ARGV-element
197 as if it were the argument of an option with character code 1.
198 Using `-' as the first character of the list of option characters
199 selects this mode of operation.
201 The special argument `--' forces an end of option-scanning regardless
202 of the value of `ordering'. In the case of RETURN_IN_ORDER, only
203 `--' can cause `getopt' to return -1 with `optind' != ARGC. */
205 static enum {
206 REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
207 } ordering;
209 /* Value of POSIXLY_CORRECT environment variable. */
210 static char *posixly_correct;
211 \f
212 /* we must include string as there are warnings without it ... */
213 #include <string.h>
215 #ifdef __GNU_LIBRARY__
216 /* We want to avoid inclusion of string.h with non-GNU libraries
217 because there are many ways it can cause trouble.
218 On some systems, it contains special magic macros that don't work
219 in GCC. */
220 #define my_index strchr
221 #else
223 /* Avoid depending on library functions or files
224 whose names are inconsistent. */
226 char *getenv(
227 );
229 static char* my_index(const char* str, int chr)
230 {
231 while (*str) {
232 if (*str == chr)
233 return (char *) str;
234 str++;
235 }
236 return 0;
237 }
239 /* If using GCC, we can safely declare strlen this way.
240 If not using GCC, it is ok not to declare it. */
241 #ifdef __GNUC__
242 /* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h.
243 That was relevant to code that was here before. */
244 #if !defined (__STDC__) || !__STDC__
245 /* gcc with -traditional declares the built-in strlen to return int,
246 and has done so at least since version 2.4.5. -- rms. */
247 extern int strlen(
248 const char *);
249 #endif /* not __STDC__ */
250 #endif /* __GNUC__ */
252 #endif /* not __GNU_LIBRARY__ */
253 \f
254 /* Handle permutation of arguments. */
256 /* Describe the part of ARGV that contains non-options that have
257 been skipped. `first_nonopt' is the index in ARGV of the first of them;
258 `last_nonopt' is the index after the last of them. */
260 static int first_nonopt;
261 static int last_nonopt;
263 #ifdef _LIBC
264 /* Bash 2.0 gives us an environment variable containing flags
265 indicating ARGV elements that should not be considered arguments. */
267 static const char *nonoption_flags;
268 static int nonoption_flags_len;
270 static int original_argc;
271 static char *const *original_argv;
273 /* Make sure the environment variable bash 2.0 puts in the environment
274 is valid for the getopt call we must make sure that the ARGV passed
275 to getopt is that one passed to the process. */
276 static void store_args(
277 int argc,
278 char *const *argv);
280 static void store_args(
281 int argc,
282 char *const *argv)
283 {
284 /* XXX This is no good solution. We should rather copy the args so
285 that we can compare them later. But we must not use malloc(3). */
286 original_argc = argc;
287 original_argv = argv;
288 }
290 text_set_element(__libc_subinit, store_args);
291 #endif
293 /* Exchange two adjacent subsequences of ARGV.
294 One subsequence is elements [first_nonopt,last_nonopt)
295 which contains all the non-options that have been skipped so far.
296 The other is elements [last_nonopt,optind), which contains all
297 the options processed since those non-options were skipped.
299 `first_nonopt' and `last_nonopt' are relocated so that they describe
300 the new indices of the non-options in ARGV after they are moved. */
302 #if defined (__STDC__) && __STDC__
303 static void exchange(
304 char **);
305 #endif
307 static void exchange(char** argv)
308 {
309 int bottom = first_nonopt;
310 int middle = last_nonopt;
311 int top = optind;
312 char *tem;
314 /* Exchange the shorter segment with the far end of the longer segment.
315 That puts the shorter segment into the right place.
316 It leaves the longer segment in the right place overall,
317 but it consists of two parts that need to be swapped next. */
319 while (top > middle && middle > bottom) {
320 if (top - middle > middle - bottom) {
321 /* Bottom segment is the short one. */
322 int len = middle - bottom;
323 register int i;
325 /* Swap it with the top part of the top segment. */
326 for (i = 0; i < len; i++) {
327 tem = argv[bottom + i];
328 argv[bottom + i] = argv[top - (middle - bottom) + i];
329 argv[top - (middle - bottom) + i] = tem;
330 }
331 /* Exclude the moved bottom segment from further swapping. */
332 top -= len;
333 } else {
334 /* Top segment is the short one. */
335 int len = top - middle;
336 register int i;
338 /* Swap it with the bottom part of the bottom segment. */
339 for (i = 0; i < len; i++) {
340 tem = argv[bottom + i];
341 argv[bottom + i] = argv[middle + i];
342 argv[middle + i] = tem;
343 }
344 /* Exclude the moved top segment from further swapping. */
345 bottom += len;
346 }
347 }
349 /* Update records for the slots the non-options now occupy. */
351 first_nonopt += (optind - last_nonopt);
352 last_nonopt = optind;
353 }
355 /* Initialize the internal data when the first call is made. */
357 #if defined (__STDC__) && __STDC__
358 static const char *_getopt_initialize(
359 int,
360 char *const *,
361 const char *);
362 #endif
363 static const char* _getopt_initialize(int argc,
364 char* const* argv,
365 const char* optstring)
366 {
367 /* Start processing options with ARGV-element 1 (since ARGV-element 0
368 is the program name); the sequence of previously skipped
369 non-option ARGV-elements is empty. */
371 first_nonopt = last_nonopt = optind = 1;
373 nextchar = NULL;
375 posixly_correct = getenv("POSIXLY_CORRECT");
377 /* Determine how to handle the ordering of options and nonoptions. */
379 if (optstring[0] == '-') {
380 ordering = RETURN_IN_ORDER;
381 ++optstring;
382 } else if (optstring[0] == '+') {
383 ordering = REQUIRE_ORDER;
384 ++optstring;
385 } else if (posixly_correct != NULL)
386 ordering = REQUIRE_ORDER;
387 else
388 ordering = PERMUTE;
390 #ifdef _LIBC
391 if (posixly_correct == NULL
392 && argc == original_argc && argv == original_argv) {
393 /* Bash 2.0 puts a special variable in the environment for each
394 command it runs, specifying which ARGV elements are the results of
395 file name wildcard expansion and therefore should not be
396 considered as options. */
397 char var[100];
399 snprintf(var, sizeof var, "_%d_GNU_nonoption_argv_flags_", getpid());
400 nonoption_flags = getenv(var);
401 if (nonoption_flags == NULL)
402 nonoption_flags_len = 0;
403 else
404 nonoption_flags_len = strlen(nonoption_flags);
405 } else
406 nonoption_flags_len = 0;
407 #endif
409 return optstring;
410 }
411 \f
412 /* Scan elements of ARGV (whose length is ARGC) for option characters
413 given in OPTSTRING.
415 If an element of ARGV starts with '-', and is not exactly "-" or "--",
416 then it is an option element. The characters of this element
417 (aside from the initial '-') are option characters. If `getopt'
418 is called repeatedly, it returns successively each of the option characters
419 from each of the option elements.
421 If `getopt' finds another option character, it returns that character,
422 updating `optind' and `nextchar' so that the next call to `getopt' can
423 resume the scan with the following option character or ARGV-element.
425 If there are no more option characters, `getopt' returns -1.
426 Then `optind' is the index in ARGV of the first ARGV-element
427 that is not an option. (The ARGV-elements have been permuted
428 so that those that are not options now come last.)
430 OPTSTRING is a string containing the legitimate option characters.
431 If an option character is seen that is not listed in OPTSTRING,
432 return '?' after printing an error message. If you set `opterr' to
433 zero, the error message is suppressed but we still return '?'.
435 If a char in OPTSTRING is followed by a colon, that means it wants an arg,
436 so the following text in the same ARGV-element, or the text of the following
437 ARGV-element, is returned in `optarg'. Two colons mean an option that
438 wants an optional arg; if there is text in the current ARGV-element,
439 it is returned in `optarg', otherwise `optarg' is set to zero.
441 If OPTSTRING starts with `-' or `+', it requests different methods of
442 handling the non-option ARGV-elements.
443 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
445 Long-named options begin with `--' instead of `-'.
446 Their names may be abbreviated as long as the abbreviation is unique
447 or is an exact match for some defined option. If they have an
448 argument, it follows the option name in the same ARGV-element, separated
449 from the option name by a `=', or else the in next ARGV-element.
450 When `getopt' finds a long-named option, it returns 0 if that option's
451 `flag' field is nonzero, the value of the option's `val' field
452 if the `flag' field is zero.
454 The elements of ARGV aren't really const, because we permute them.
455 But we pretend they're const in the prototype to be compatible
456 with other systems.
458 LONGOPTS is a vector of `struct option' terminated by an
459 element containing a name which is zero.
461 LONGIND returns the index in LONGOPT of the long-named option found.
462 It is only valid when a long-named option has been found by the most
463 recent call.
465 If LONG_ONLY is nonzero, '-' as well as '--' can introduce
466 long-named options. */
468 int _getopt_internal(int argc,
469 #ifdef WIN32
470 char** argv,
471 #else // WIN32
472 char* const* argv,
473 #endif //WIN32
474 const char *optstring,
475 const struct option *longopts,
476 int* longind,
477 int long_only)
478 {
479 optarg = NULL;
481 if (!__getopt_initialized || optind == 0) {
482 optstring = _getopt_initialize(argc, argv, optstring);
483 optind = 1; /* Don't scan ARGV[0], the program name. */
484 __getopt_initialized = 1;
485 }
487 /* Test whether ARGV[optind] points to a non-option argument.
488 Either it does not have option syntax, or there is an environment flag
489 from the shell indicating it is not an option. The later information
490 is only used when the used in the GNU libc. */
491 #ifdef _LIBC
492 #define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \
493 || (optind < nonoption_flags_len \
494 && nonoption_flags[optind] == '1'))
495 #else
496 #define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0')
497 #endif
499 if (nextchar == NULL || *nextchar == '\0') {
500 /* Advance to the next ARGV-element. */
502 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been
503 moved back by the user (who may also have changed the arguments). */
504 if (last_nonopt > optind)
505 last_nonopt = optind;
506 if (first_nonopt > optind)
507 first_nonopt = optind;
509 if (ordering == PERMUTE) {
510 /* If we have just processed some options following some non-options,
511 exchange them so that the options come first. */
513 if (first_nonopt != last_nonopt && last_nonopt != optind)
514 exchange((char **) argv);
515 else if (last_nonopt != optind)
516 first_nonopt = optind;
518 /* Skip any additional non-options
519 and extend the range of non-options previously skipped. */
521 while (optind < argc && NONOPTION_P)
522 optind++;
523 last_nonopt = optind;
524 }
526 /* The special ARGV-element `--' means premature end of options.
527 Skip it like a null option,
528 then exchange with previous non-options as if it were an option,
529 then skip everything else like a non-option. */
531 if (optind != argc && !strcmp(argv[optind], "--")) {
532 optind++;
534 if (first_nonopt != last_nonopt && last_nonopt != optind)
535 exchange((char **) argv);
536 else if (first_nonopt == last_nonopt)
537 first_nonopt = optind;
538 last_nonopt = argc;
540 optind = argc;
541 }
543 /* If we have done all the ARGV-elements, stop the scan
544 and back over any non-options that we skipped and permuted. */
546 if (optind == argc) {
547 /* Set the next-arg-index to point at the non-options
548 that we previously skipped, so the caller will digest them. */
549 if (first_nonopt != last_nonopt)
550 optind = first_nonopt;
551 return -1;
552 }
554 /* If we have come to a non-option and did not permute it,
555 either stop the scan or describe it to the caller and pass it by. */
557 if (NONOPTION_P) {
558 if (ordering == REQUIRE_ORDER)
559 return -1;
560 optarg = argv[optind++];
561 return 1;
562 }
564 /* We have found another option-ARGV-element.
565 Skip the initial punctuation. */
567 nextchar = (argv[optind] + 1
568 + (longopts != NULL && argv[optind][1] == '-'));
569 }
571 /* Decode the current option-ARGV-element. */
573 /* Check whether the ARGV-element is a long option.
575 If long_only and the ARGV-element has the form "-f", where f is
576 a valid short option, don't consider it an abbreviated form of
577 a long option that starts with f. Otherwise there would be no
578 way to give the -f short option.
580 On the other hand, if there's a long option "fubar" and
581 the ARGV-element is "-fu", do consider that an abbreviation of
582 the long option, just like "--fu", and not "-f" with arg "u".
584 This distinction seems to be the most useful approach. */
586 if (longopts != NULL
587 && (argv[optind][1] == '-' || (long_only && (argv[optind][2]
588 || !my_index(optstring,
589 argv[optind]
590 [1]))))) {
591 char *nameend;
592 const struct option *p;
593 const struct option *pfound = NULL;
594 int exact = 0;
595 int ambig = 0;
596 int indfound = -1;
597 int option_index;
599 for (nameend = nextchar; *nameend && *nameend != '='; nameend++)
600 /* Do nothing. */ ;
602 /* Test all long options for either exact match
603 or abbreviated matches. */
604 for (p = longopts, option_index = 0; p->name; p++, option_index++)
605 if (!strncmp(p->name, nextchar, nameend - nextchar)) {
606 if ((unsigned int) (nameend - nextchar)
607 == (unsigned int) strlen(p->name)) {
608 /* Exact match found. */
609 pfound = p;
610 indfound = option_index;
611 exact = 1;
612 break;
613 } else if (pfound == NULL) {
614 /* First nonexact match found. */
615 pfound = p;
616 indfound = option_index;
617 } else
618 /* Second or later nonexact match found. */
619 ambig = 1;
620 }
622 if (ambig && !exact) {
623 if (opterr)
624 fprintf(stderr, _("%s: option `%s' is ambiguous\n"),
625 argv[0], argv[optind]);
626 nextchar += strlen(nextchar);
627 optind++;
628 optopt = 0;
629 return '?';
630 }
632 if (pfound != NULL) {
633 option_index = indfound;
634 optind++;
635 if (*nameend) {
636 /* Don't test has_arg with >, because some C compilers don't
637 allow it to be used on enums. */
638 if (pfound->has_arg)
639 optarg = nameend + 1;
640 else {
641 if (opterr) {
642 if (argv[optind - 1][1] == '-')
643 /* --option */
644 fprintf(stderr,
645 _
646 ("%s: option `--%s' doesn't allow an argument\n"),
647 argv[0], pfound->name);
648 else
649 /* +option or -option */
650 fprintf(stderr,
651 _
652 ("%s: option `%c%s' doesn't allow an argument\n"),
653 argv[0], argv[optind - 1][0],
654 pfound->name);
655 }
656 nextchar += strlen(nextchar);
658 optopt = pfound->val;
659 return '?';
660 }
661 } else if (pfound->has_arg == 1) {
662 if (optind < argc)
663 optarg = argv[optind++];
664 else {
665 if (opterr)
666 fprintf(stderr,
667 _("%s: option `%s' requires an argument\n"),
668 argv[0], argv[optind - 1]);
669 nextchar += strlen(nextchar);
670 optopt = pfound->val;
671 return optstring[0] == ':' ? ':' : '?';
672 }
673 }
674 nextchar += strlen(nextchar);
675 if (longind != NULL)
676 *longind = option_index;
677 if (pfound->flag) {
678 *(pfound->flag) = pfound->val;
679 return 0;
680 }
681 return pfound->val;
682 }
684 /* Can't find it as a long option. If this is not getopt_long_only,
685 or the option starts with '--' or is not a valid short
686 option, then it's an error.
687 Otherwise interpret it as a short option. */
688 if (!long_only || argv[optind][1] == '-'
689 || my_index(optstring, *nextchar) == NULL) {
690 if (opterr) {
691 if (argv[optind][1] == '-')
692 /* --option */
693 fprintf(stderr, _("%s: unrecognized option `--%s'\n"),
694 argv[0], nextchar);
695 else
696 /* +option or -option */
697 fprintf(stderr, _("%s: unrecognized option `%c%s'\n"),
698 argv[0], argv[optind][0], nextchar);
699 }
700 nextchar = (char *) "";
701 optind++;
702 optopt = 0;
703 return '?';
704 }
705 }
707 /* Look at and handle the next short option-character. */
709 {
710 char c = *nextchar++;
711 char *temp = my_index(optstring, c);
713 /* Increment `optind' when we start to process its last character. */
714 if (*nextchar == '\0')
715 ++optind;
717 if (temp == NULL || c == ':') {
718 if (opterr) {
719 if (posixly_correct)
720 /* 1003.2 specifies the format of this message. */
721 fprintf(stderr, _("%s: illegal option -- %c\n"),
722 argv[0], c);
723 else
724 fprintf(stderr, _("%s: invalid option -- %c\n"),
725 argv[0], c);
726 }
727 optopt = c;
728 return '?';
729 }
730 /* Convenience. Treat POSIX -W foo same as long option --foo */
731 if (temp[0] == 'W' && temp[1] == ';') {
732 char *nameend;
733 const struct option *p;
734 const struct option *pfound = NULL;
735 int exact = 0;
736 int ambig = 0;
737 int indfound = 0;
738 int option_index;
740 /* This is an option that requires an argument. */
741 if (*nextchar != '\0') {
742 optarg = nextchar;
743 /* If we end this ARGV-element by taking the rest as an arg,
744 we must advance to the next element now. */
745 optind++;
746 } else if (optind == argc) {
747 if (opterr) {
748 /* 1003.2 specifies the format of this message. */
749 fprintf(stderr,
750 _("%s: option requires an argument -- %c\n"),
751 argv[0], c);
752 }
753 optopt = c;
754 if (optstring[0] == ':')
755 c = ':';
756 else
757 c = '?';
758 return c;
759 } else
760 /* We already incremented `optind' once;
761 increment it again when taking next ARGV-elt as argument. */
762 optarg = argv[optind++];
764 /* optarg is now the argument, see if it's in the
765 table of longopts. */
767 for (nextchar = nameend = optarg; *nameend && *nameend != '=';
768 nameend++)
769 /* Do nothing. */ ;
771 /* Test all long options for either exact match
772 or abbreviated matches. */
773 for (p = longopts, option_index = 0; p->name; p++, option_index++)
774 if (!strncmp(p->name, nextchar, nameend - nextchar)) {
775 if ((unsigned int) (nameend - nextchar) ==
776 strlen(p->name)) {
777 /* Exact match found. */
778 pfound = p;
779 indfound = option_index;
780 exact = 1;
781 break;
782 } else if (pfound == NULL) {
783 /* First nonexact match found. */
784 pfound = p;
785 indfound = option_index;
786 } else
787 /* Second or later nonexact match found. */
788 ambig = 1;
789 }
790 if (ambig && !exact) {
791 if (opterr)
792 fprintf(stderr, _("%s: option `-W %s' is ambiguous\n"),
793 argv[0], argv[optind]);
794 nextchar += strlen(nextchar);
795 optind++;
796 return '?';
797 }
798 if (pfound != NULL) {
799 option_index = indfound;
800 if (*nameend) {
801 /* Don't test has_arg with >, because some C compilers don't
802 allow it to be used on enums. */
803 if (pfound->has_arg)
804 optarg = nameend + 1;
805 else {
806 if (opterr)
807 fprintf(stderr, _("\
808 %s: option `-W %s' doesn't allow an argument\n"), argv[0], pfound->name);
810 nextchar += strlen(nextchar);
811 return '?';
812 }
813 } else if (pfound->has_arg == 1) {
814 if (optind < argc)
815 optarg = argv[optind++];
816 else {
817 if (opterr)
818 fprintf(stderr,
819 _
820 ("%s: option `%s' requires an argument\n"),
821 argv[0], argv[optind - 1]);
822 nextchar += strlen(nextchar);
823 return optstring[0] == ':' ? ':' : '?';
824 }
825 }
826 nextchar += strlen(nextchar);
827 if (longind != NULL)
828 *longind = option_index;
829 if (pfound->flag) {
830 *(pfound->flag) = pfound->val;
831 return 0;
832 }
833 return pfound->val;
834 }
835 nextchar = NULL;
836 return 'W'; /* Let the application handle it. */
837 }
838 if (temp[1] == ':') {
839 if (temp[2] == ':') {
840 /* This is an option that accepts an argument optionally. */
841 if (*nextchar != '\0') {
842 optarg = nextchar;
843 optind++;
844 } else
845 optarg = NULL;
846 nextchar = NULL;
847 } else {
848 /* This is an option that requires an argument. */
849 if (*nextchar != '\0') {
850 optarg = nextchar;
851 /* If we end this ARGV-element by taking the rest as an arg,
852 we must advance to the next element now. */
853 optind++;
854 } else if (optind == argc) {
855 if (opterr) {
856 /* 1003.2 specifies the format of this message. */
857 fprintf(stderr,
858 _("%s: option requires an argument -- %c\n"),
859 argv[0], c);
860 }
861 optopt = c;
862 if (optstring[0] == ':')
863 c = ':';
864 else
865 c = '?';
866 } else
867 /* We already incremented `optind' once;
868 increment it again when taking next ARGV-elt as argument. */
869 optarg = argv[optind++];
870 nextchar = NULL;
871 }
872 }
873 return c;
874 }
875 }
877 #endif /* Not ELIDE_CODE. */
878 \f
879 #ifdef TEST
881 /* Compile with -DTEST to make an executable for use in testing
882 the above definition of `getopt'. */
884 int main(
885 argc,
886 argv)
887 int argc;
888 char **argv;
889 {
890 int c;
891 int digit_optind = 0;
893 while (1) {
894 int this_option_optind = optind ? optind : 1;
896 c = getopt(argc, argv, "abc:d:0123456789");
897 if (c == -1)
898 break;
900 switch (c) {
901 case '0':
902 case '1':
903 case '2':
904 case '3':
905 case '4':
906 case '5':
907 case '6':
908 case '7':
909 case '8':
910 case '9':
911 if (digit_optind != 0 && digit_optind != this_option_optind)
912 printf("digits occur in two different argv-elements.\n");
913 digit_optind = this_option_optind;
914 printf("option %c\n", c);
915 break;
917 case 'a':
918 printf("option a\n");
919 break;
921 case 'b':
922 printf("option b\n");
923 break;
925 case 'c':
926 printf("option c with value `%s'\n", optarg);
927 break;
929 case '?':
930 break;
932 default:
933 printf("?? getopt returned character code 0%o ??\n", c);
934 }
935 }
937 if (optind < argc) {
938 printf("non-option ARGV-elements: ");
939 while (optind < argc)
940 printf("%s ", argv[optind++]);
941 printf("\n");
942 }
944 exit(0);
945 }
947 #endif /* TEST */