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 Copyright (C) 1987,88,89,90,91,92,93,94,95,96,98,99,2000,2001,2002,2003,2004,2006
6 Free Software Foundation, Inc.
7 This file is part of the GNU C Library.
9 This program is free software: you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21 \f
22 #ifndef _LIBC
23 # include <config.h>
24 #endif
26 #include "getopt.h"
28 #include <stdio.h>
29 #include <stdlib.h>
30 #include <string.h>
31 #include <unistd.h>
33 #ifdef __VMS
34 # include <unixlib.h>
35 #endif
37 #ifdef _LIBC
38 # include <libintl.h>
39 #else
40 # include "gettext.h"
41 # define _(msgid) gettext (msgid)
42 #endif
44 #if defined _LIBC && defined USE_IN_LIBIO
45 # include <wchar.h>
46 #endif
48 #ifndef attribute_hidden
49 # define attribute_hidden
50 #endif
52 /* Unlike standard Unix `getopt', functions like `getopt_long'
53 let the user intersperse the options with the other arguments.
55 As `getopt_long' works, it permutes the elements of ARGV so that,
56 when it is done, all the options precede everything else. Thus
57 all application programs are extended to handle flexible argument order.
59 Using `getopt' or setting the environment variable POSIXLY_CORRECT
60 disables permutation.
61 Then the application's behavior is completely standard.
63 GNU application programs can use a third alternative mode in which
64 they can distinguish the relative order of options and other arguments. */
66 #include "getopt_int.h"
68 /* For communication from `getopt' to the caller.
69 When `getopt' finds an option that takes an argument,
70 the argument value is returned here.
71 Also, when `ordering' is RETURN_IN_ORDER,
72 each non-option ARGV-element is returned here. */
74 char *optarg;
76 /* Index in ARGV of the next element to be scanned.
77 This is used for communication to and from the caller
78 and for communication between successive calls to `getopt'.
80 On entry to `getopt', zero means this is the first call; initialize.
82 When `getopt' returns -1, this is the index of the first of the
83 non-option elements that the caller should itself scan.
85 Otherwise, `optind' communicates from one call to the next
86 how much of ARGV has been scanned so far. */
88 /* 1003.2 says this must be 1 before any call. */
89 int optind = 1;
91 /* Callers store zero here to inhibit the error message
92 for unrecognized options. */
94 int opterr = 1;
96 /* Set to an option character which was unrecognized.
97 This must be initialized on some systems to avoid linking in the
98 system's own getopt implementation. */
100 int optopt = '?';
102 /* Keep a global copy of all internal members of getopt_data. */
104 static struct _getopt_data getopt_data;
106 \f
107 #if defined HAVE_DECL_GETENV && !HAVE_DECL_GETENV
108 extern char *getenv ();
109 #endif
110 \f
111 #ifdef _LIBC
112 /* Stored original parameters.
113 XXX This is no good solution. We should rather copy the args so
114 that we can compare them later. But we must not use malloc(3). */
115 extern int __libc_argc;
116 extern char **__libc_argv;
118 /* Bash 2.0 gives us an environment variable containing flags
119 indicating ARGV elements that should not be considered arguments. */
121 # ifdef USE_NONOPTION_FLAGS
122 /* Defined in getopt_init.c */
123 extern char *__getopt_nonoption_flags;
124 # endif
126 # ifdef USE_NONOPTION_FLAGS
127 # define SWAP_FLAGS(ch1, ch2) \
128 if (d->__nonoption_flags_len > 0) \
129 { \
130 char __tmp = __getopt_nonoption_flags[ch1]; \
131 __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \
132 __getopt_nonoption_flags[ch2] = __tmp; \
133 }
134 # else
135 # define SWAP_FLAGS(ch1, ch2)
136 # endif
137 #else /* !_LIBC */
138 # define SWAP_FLAGS(ch1, ch2)
139 #endif /* _LIBC */
141 /* Exchange two adjacent subsequences of ARGV.
142 One subsequence is elements [first_nonopt,last_nonopt)
143 which contains all the non-options that have been skipped so far.
144 The other is elements [last_nonopt,optind), which contains all
145 the options processed since those non-options were skipped.
147 `first_nonopt' and `last_nonopt' are relocated so that they describe
148 the new indices of the non-options in ARGV after they are moved. */
150 static void
151 exchange (char **argv, struct _getopt_data *d)
152 {
153 int bottom = d->__first_nonopt;
154 int middle = d->__last_nonopt;
155 int top = d->optind;
156 char *tem;
158 /* Exchange the shorter segment with the far end of the longer segment.
159 That puts the shorter segment into the right place.
160 It leaves the longer segment in the right place overall,
161 but it consists of two parts that need to be swapped next. */
163 #if defined _LIBC && defined USE_NONOPTION_FLAGS
164 /* First make sure the handling of the `__getopt_nonoption_flags'
165 string can work normally. Our top argument must be in the range
166 of the string. */
167 if (d->__nonoption_flags_len > 0 && top >= d->__nonoption_flags_max_len)
168 {
169 /* We must extend the array. The user plays games with us and
170 presents new arguments. */
171 char *new_str = malloc (top + 1);
172 if (new_str == NULL)
173 d->__nonoption_flags_len = d->__nonoption_flags_max_len = 0;
174 else
175 {
176 memset (__mempcpy (new_str, __getopt_nonoption_flags,
177 d->__nonoption_flags_max_len),
178 '\0', top + 1 - d->__nonoption_flags_max_len);
179 d->__nonoption_flags_max_len = top + 1;
180 __getopt_nonoption_flags = new_str;
181 }
182 }
183 #endif
185 while (top > middle && middle > bottom)
186 {
187 if (top - middle > middle - bottom)
188 {
189 /* Bottom segment is the short one. */
190 int len = middle - bottom;
191 register int i;
193 /* Swap it with the top part of the top segment. */
194 for (i = 0; i < len; i++)
195 {
196 tem = argv[bottom + i];
197 argv[bottom + i] = argv[top - (middle - bottom) + i];
198 argv[top - (middle - bottom) + i] = tem;
199 SWAP_FLAGS (bottom + i, top - (middle - bottom) + i);
200 }
201 /* Exclude the moved bottom segment from further swapping. */
202 top -= len;
203 }
204 else
205 {
206 /* Top segment is the short one. */
207 int len = top - middle;
208 register int i;
210 /* Swap it with the bottom part of the bottom segment. */
211 for (i = 0; i < len; i++)
212 {
213 tem = argv[bottom + i];
214 argv[bottom + i] = argv[middle + i];
215 argv[middle + i] = tem;
216 SWAP_FLAGS (bottom + i, middle + i);
217 }
218 /* Exclude the moved top segment from further swapping. */
219 bottom += len;
220 }
221 }
223 /* Update records for the slots the non-options now occupy. */
225 d->__first_nonopt += (d->optind - d->__last_nonopt);
226 d->__last_nonopt = d->optind;
227 }
229 /* Initialize the internal data when the first call is made. */
231 static const char *
232 _getopt_initialize (int argc, char **argv, const char *optstring,
233 int posixly_correct, struct _getopt_data *d)
234 {
235 /* Start processing options with ARGV-element 1 (since ARGV-element 0
236 is the program name); the sequence of previously skipped
237 non-option ARGV-elements is empty. */
239 d->__first_nonopt = d->__last_nonopt = d->optind;
241 d->__nextchar = NULL;
243 d->__posixly_correct = posixly_correct || !!getenv ("POSIXLY_CORRECT");
245 /* Determine how to handle the ordering of options and nonoptions. */
247 if (optstring[0] == '-')
248 {
249 d->__ordering = RETURN_IN_ORDER;
250 ++optstring;
251 }
252 else if (optstring[0] == '+')
253 {
254 d->__ordering = REQUIRE_ORDER;
255 ++optstring;
256 }
257 else if (d->__posixly_correct)
258 d->__ordering = REQUIRE_ORDER;
259 else
260 d->__ordering = PERMUTE;
262 #if defined _LIBC && defined USE_NONOPTION_FLAGS
263 if (!d->__posixly_correct
264 && argc == __libc_argc && argv == __libc_argv)
265 {
266 if (d->__nonoption_flags_max_len == 0)
267 {
268 if (__getopt_nonoption_flags == NULL
269 || __getopt_nonoption_flags[0] == '\0')
270 d->__nonoption_flags_max_len = -1;
271 else
272 {
273 const char *orig_str = __getopt_nonoption_flags;
274 int len = d->__nonoption_flags_max_len = strlen (orig_str);
275 if (d->__nonoption_flags_max_len < argc)
276 d->__nonoption_flags_max_len = argc;
277 __getopt_nonoption_flags =
278 (char *) malloc (d->__nonoption_flags_max_len);
279 if (__getopt_nonoption_flags == NULL)
280 d->__nonoption_flags_max_len = -1;
281 else
282 memset (__mempcpy (__getopt_nonoption_flags, orig_str, len),
283 '\0', d->__nonoption_flags_max_len - len);
284 }
285 }
286 d->__nonoption_flags_len = d->__nonoption_flags_max_len;
287 }
288 else
289 d->__nonoption_flags_len = 0;
290 #endif
292 return optstring;
293 }
294 \f
295 /* Scan elements of ARGV (whose length is ARGC) for option characters
296 given in OPTSTRING.
298 If an element of ARGV starts with '-', and is not exactly "-" or "--",
299 then it is an option element. The characters of this element
300 (aside from the initial '-') are option characters. If `getopt'
301 is called repeatedly, it returns successively each of the option characters
302 from each of the option elements.
304 If `getopt' finds another option character, it returns that character,
305 updating `optind' and `nextchar' so that the next call to `getopt' can
306 resume the scan with the following option character or ARGV-element.
308 If there are no more option characters, `getopt' returns -1.
309 Then `optind' is the index in ARGV of the first ARGV-element
310 that is not an option. (The ARGV-elements have been permuted
311 so that those that are not options now come last.)
313 OPTSTRING is a string containing the legitimate option characters.
314 If an option character is seen that is not listed in OPTSTRING,
315 return '?' after printing an error message. If you set `opterr' to
316 zero, the error message is suppressed but we still return '?'.
318 If a char in OPTSTRING is followed by a colon, that means it wants an arg,
319 so the following text in the same ARGV-element, or the text of the following
320 ARGV-element, is returned in `optarg'. Two colons mean an option that
321 wants an optional arg; if there is text in the current ARGV-element,
322 it is returned in `optarg', otherwise `optarg' is set to zero.
324 If OPTSTRING starts with `-' or `+', it requests different methods of
325 handling the non-option ARGV-elements.
326 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
328 Long-named options begin with `--' instead of `-'.
329 Their names may be abbreviated as long as the abbreviation is unique
330 or is an exact match for some defined option. If they have an
331 argument, it follows the option name in the same ARGV-element, separated
332 from the option name by a `=', or else the in next ARGV-element.
333 When `getopt' finds a long-named option, it returns 0 if that option's
334 `flag' field is nonzero, the value of the option's `val' field
335 if the `flag' field is zero.
337 LONGOPTS is a vector of `struct option' terminated by an
338 element containing a name which is zero.
340 LONGIND returns the index in LONGOPT of the long-named option found.
341 It is only valid when a long-named option has been found by the most
342 recent call.
344 If LONG_ONLY is nonzero, '-' as well as '--' can introduce
345 long-named options.
347 If POSIXLY_CORRECT is nonzero, behave as if the POSIXLY_CORRECT
348 environment variable were set. */
350 int
351 _getopt_internal_r (int argc, char **argv, const char *optstring,
352 const struct option *longopts, int *longind,
353 int long_only, int posixly_correct, struct _getopt_data *d)
354 {
355 int print_errors = d->opterr;
356 if (optstring[0] == ':')
357 print_errors = 0;
359 if (argc < 1)
360 return -1;
362 d->optarg = NULL;
364 if (d->optind == 0 || !d->__initialized)
365 {
366 if (d->optind == 0)
367 d->optind = 1; /* Don't scan ARGV[0], the program name. */
368 optstring = _getopt_initialize (argc, argv, optstring,
369 posixly_correct, d);
370 d->__initialized = 1;
371 }
373 /* Test whether ARGV[optind] points to a non-option argument.
374 Either it does not have option syntax, or there is an environment flag
375 from the shell indicating it is not an option. The later information
376 is only used when the used in the GNU libc. */
377 #if defined _LIBC && defined USE_NONOPTION_FLAGS
378 # define NONOPTION_P (argv[d->optind][0] != '-' || argv[d->optind][1] == '\0' \
379 || (d->optind < d->__nonoption_flags_len \
380 && __getopt_nonoption_flags[d->optind] == '1'))
381 #else
382 # define NONOPTION_P (argv[d->optind][0] != '-' || argv[d->optind][1] == '\0')
383 #endif
385 if (d->__nextchar == NULL || *d->__nextchar == '\0')
386 {
387 /* Advance to the next ARGV-element. */
389 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been
390 moved back by the user (who may also have changed the arguments). */
391 if (d->__last_nonopt > d->optind)
392 d->__last_nonopt = d->optind;
393 if (d->__first_nonopt > d->optind)
394 d->__first_nonopt = d->optind;
396 if (d->__ordering == PERMUTE)
397 {
398 /* If we have just processed some options following some non-options,
399 exchange them so that the options come first. */
401 if (d->__first_nonopt != d->__last_nonopt
402 && d->__last_nonopt != d->optind)
403 exchange ((char **) argv, d);
404 else if (d->__last_nonopt != d->optind)
405 d->__first_nonopt = d->optind;
407 /* Skip any additional non-options
408 and extend the range of non-options previously skipped. */
410 while (d->optind < argc && NONOPTION_P)
411 d->optind++;
412 d->__last_nonopt = d->optind;
413 }
415 /* The special ARGV-element `--' means premature end of options.
416 Skip it like a null option,
417 then exchange with previous non-options as if it were an option,
418 then skip everything else like a non-option. */
420 if (d->optind != argc && !strcmp (argv[d->optind], "--"))
421 {
422 d->optind++;
424 if (d->__first_nonopt != d->__last_nonopt
425 && d->__last_nonopt != d->optind)
426 exchange ((char **) argv, d);
427 else if (d->__first_nonopt == d->__last_nonopt)
428 d->__first_nonopt = d->optind;
429 d->__last_nonopt = argc;
431 d->optind = argc;
432 }
434 /* If we have done all the ARGV-elements, stop the scan
435 and back over any non-options that we skipped and permuted. */
437 if (d->optind == argc)
438 {
439 /* Set the next-arg-index to point at the non-options
440 that we previously skipped, so the caller will digest them. */
441 if (d->__first_nonopt != d->__last_nonopt)
442 d->optind = d->__first_nonopt;
443 return -1;
444 }
446 /* If we have come to a non-option and did not permute it,
447 either stop the scan or describe it to the caller and pass it by. */
449 if (NONOPTION_P)
450 {
451 if (d->__ordering == REQUIRE_ORDER)
452 return -1;
453 d->optarg = argv[d->optind++];
454 return 1;
455 }
457 /* We have found another option-ARGV-element.
458 Skip the initial punctuation. */
460 d->__nextchar = (argv[d->optind] + 1
461 + (longopts != NULL && argv[d->optind][1] == '-'));
462 }
464 /* Decode the current option-ARGV-element. */
466 /* Check whether the ARGV-element is a long option.
468 If long_only and the ARGV-element has the form "-f", where f is
469 a valid short option, don't consider it an abbreviated form of
470 a long option that starts with f. Otherwise there would be no
471 way to give the -f short option.
473 On the other hand, if there's a long option "fubar" and
474 the ARGV-element is "-fu", do consider that an abbreviation of
475 the long option, just like "--fu", and not "-f" with arg "u".
477 This distinction seems to be the most useful approach. */
479 if (longopts != NULL
480 && (argv[d->optind][1] == '-'
481 || (long_only && (argv[d->optind][2]
482 || !strchr (optstring, argv[d->optind][1])))))
483 {
484 char *nameend;
485 const struct option *p;
486 const struct option *pfound = NULL;
487 int exact = 0;
488 int ambig = 0;
489 int indfound = -1;
490 int option_index;
492 for (nameend = d->__nextchar; *nameend && *nameend != '='; nameend++)
493 /* Do nothing. */ ;
495 /* Test all long options for either exact match
496 or abbreviated matches. */
497 for (p = longopts, option_index = 0; p->name; p++, option_index++)
498 if (!strncmp (p->name, d->__nextchar, nameend - d->__nextchar))
499 {
500 if ((unsigned int) (nameend - d->__nextchar)
501 == (unsigned int) strlen (p->name))
502 {
503 /* Exact match found. */
504 pfound = p;
505 indfound = option_index;
506 exact = 1;
507 break;
508 }
509 else if (pfound == NULL)
510 {
511 /* First nonexact match found. */
512 pfound = p;
513 indfound = option_index;
514 }
515 else if (long_only
516 || pfound->has_arg != p->has_arg
517 || pfound->flag != p->flag
518 || pfound->val != p->val)
519 /* Second or later nonexact match found. */
520 ambig = 1;
521 }
523 if (ambig && !exact)
524 {
525 if (print_errors)
526 {
527 #if defined _LIBC && defined USE_IN_LIBIO
528 char *buf;
530 if (__asprintf (&buf, _("%s: option `%s' is ambiguous\n"),
531 argv[0], argv[d->optind]) >= 0)
532 {
533 _IO_flockfile (stderr);
535 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
536 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
538 __fxprintf (NULL, "%s", buf);
540 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
541 _IO_funlockfile (stderr);
543 free (buf);
544 }
545 #else
546 fprintf (stderr, _("%s: option `%s' is ambiguous\n"),
547 argv[0], argv[d->optind]);
548 #endif
549 }
550 d->__nextchar += strlen (d->__nextchar);
551 d->optind++;
552 d->optopt = 0;
553 return '?';
554 }
556 if (pfound != NULL)
557 {
558 option_index = indfound;
559 d->optind++;
560 if (*nameend)
561 {
562 /* Don't test has_arg with >, because some C compilers don't
563 allow it to be used on enums. */
564 if (pfound->has_arg)
565 d->optarg = nameend + 1;
566 else
567 {
568 if (print_errors)
569 {
570 #if defined _LIBC && defined USE_IN_LIBIO
571 char *buf;
572 int n;
573 #endif
575 if (argv[d->optind - 1][1] == '-')
576 {
577 /* --option */
578 #if defined _LIBC && defined USE_IN_LIBIO
579 n = __asprintf (&buf, _("\
580 %s: option `--%s' doesn't allow an argument\n"),
581 argv[0], pfound->name);
582 #else
583 fprintf (stderr, _("\
584 %s: option `--%s' doesn't allow an argument\n"),
585 argv[0], pfound->name);
586 #endif
587 }
588 else
589 {
590 /* +option or -option */
591 #if defined _LIBC && defined USE_IN_LIBIO
592 n = __asprintf (&buf, _("\
593 %s: option `%c%s' doesn't allow an argument\n"),
594 argv[0], argv[d->optind - 1][0],
595 pfound->name);
596 #else
597 fprintf (stderr, _("\
598 %s: option `%c%s' doesn't allow an argument\n"),
599 argv[0], argv[d->optind - 1][0],
600 pfound->name);
601 #endif
602 }
604 #if defined _LIBC && defined USE_IN_LIBIO
605 if (n >= 0)
606 {
607 _IO_flockfile (stderr);
609 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
610 ((_IO_FILE *) stderr)->_flags2
611 |= _IO_FLAGS2_NOTCANCEL;
613 __fxprintf (NULL, "%s", buf);
615 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
616 _IO_funlockfile (stderr);
618 free (buf);
619 }
620 #endif
621 }
623 d->__nextchar += strlen (d->__nextchar);
625 d->optopt = pfound->val;
626 return '?';
627 }
628 }
629 else if (pfound->has_arg == 1)
630 {
631 if (d->optind < argc)
632 d->optarg = argv[d->optind++];
633 else
634 {
635 if (print_errors)
636 {
637 #if defined _LIBC && defined USE_IN_LIBIO
638 char *buf;
640 if (__asprintf (&buf, _("\
641 %s: option `%s' requires an argument\n"),
642 argv[0], argv[d->optind - 1]) >= 0)
643 {
644 _IO_flockfile (stderr);
646 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
647 ((_IO_FILE *) stderr)->_flags2
648 |= _IO_FLAGS2_NOTCANCEL;
650 __fxprintf (NULL, "%s", buf);
652 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
653 _IO_funlockfile (stderr);
655 free (buf);
656 }
657 #else
658 fprintf (stderr,
659 _("%s: option `%s' requires an argument\n"),
660 argv[0], argv[d->optind - 1]);
661 #endif
662 }
663 d->__nextchar += strlen (d->__nextchar);
664 d->optopt = pfound->val;
665 return optstring[0] == ':' ? ':' : '?';
666 }
667 }
668 d->__nextchar += strlen (d->__nextchar);
669 if (longind != NULL)
670 *longind = option_index;
671 if (pfound->flag)
672 {
673 *(pfound->flag) = pfound->val;
674 return 0;
675 }
676 return pfound->val;
677 }
679 /* Can't find it as a long option. If this is not getopt_long_only,
680 or the option starts with '--' or is not a valid short
681 option, then it's an error.
682 Otherwise interpret it as a short option. */
683 if (!long_only || argv[d->optind][1] == '-'
684 || strchr (optstring, *d->__nextchar) == NULL)
685 {
686 if (print_errors)
687 {
688 #if defined _LIBC && defined USE_IN_LIBIO
689 char *buf;
690 int n;
691 #endif
693 if (argv[d->optind][1] == '-')
694 {
695 /* --option */
696 #if defined _LIBC && defined USE_IN_LIBIO
697 n = __asprintf (&buf, _("%s: unrecognized option `--%s'\n"),
698 argv[0], d->__nextchar);
699 #else
700 fprintf (stderr, _("%s: unrecognized option `--%s'\n"),
701 argv[0], d->__nextchar);
702 #endif
703 }
704 else
705 {
706 /* +option or -option */
707 #if defined _LIBC && defined USE_IN_LIBIO
708 n = __asprintf (&buf, _("%s: unrecognized option `%c%s'\n"),
709 argv[0], argv[d->optind][0], d->__nextchar);
710 #else
711 fprintf (stderr, _("%s: unrecognized option `%c%s'\n"),
712 argv[0], argv[d->optind][0], d->__nextchar);
713 #endif
714 }
716 #if defined _LIBC && defined USE_IN_LIBIO
717 if (n >= 0)
718 {
719 _IO_flockfile (stderr);
721 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
722 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
724 __fxprintf (NULL, "%s", buf);
726 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
727 _IO_funlockfile (stderr);
729 free (buf);
730 }
731 #endif
732 }
733 d->__nextchar = (char *) "";
734 d->optind++;
735 d->optopt = 0;
736 return '?';
737 }
738 }
740 /* Look at and handle the next short option-character. */
742 {
743 char c = *d->__nextchar++;
744 char *temp = strchr (optstring, c);
746 /* Increment `optind' when we start to process its last character. */
747 if (*d->__nextchar == '\0')
748 ++d->optind;
750 if (temp == NULL || c == ':')
751 {
752 if (print_errors)
753 {
754 #if defined _LIBC && defined USE_IN_LIBIO
755 char *buf;
756 int n;
757 #endif
759 if (d->__posixly_correct)
760 {
761 /* 1003.2 specifies the format of this message. */
762 #if defined _LIBC && defined USE_IN_LIBIO
763 n = __asprintf (&buf, _("%s: illegal option -- %c\n"),
764 argv[0], c);
765 #else
766 fprintf (stderr, _("%s: illegal option -- %c\n"), argv[0], c);
767 #endif
768 }
769 else
770 {
771 #if defined _LIBC && defined USE_IN_LIBIO
772 n = __asprintf (&buf, _("%s: invalid option -- %c\n"),
773 argv[0], c);
774 #else
775 fprintf (stderr, _("%s: invalid option -- %c\n"), argv[0], c);
776 #endif
777 }
779 #if defined _LIBC && defined USE_IN_LIBIO
780 if (n >= 0)
781 {
782 _IO_flockfile (stderr);
784 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
785 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
787 __fxprintf (NULL, "%s", buf);
789 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
790 _IO_funlockfile (stderr);
792 free (buf);
793 }
794 #endif
795 }
796 d->optopt = c;
797 return '?';
798 }
799 /* Convenience. Treat POSIX -W foo same as long option --foo */
800 if (temp[0] == 'W' && temp[1] == ';')
801 {
802 char *nameend;
803 const struct option *p;
804 const struct option *pfound = NULL;
805 int exact = 0;
806 int ambig = 0;
807 int indfound = 0;
808 int option_index;
810 /* This is an option that requires an argument. */
811 if (*d->__nextchar != '\0')
812 {
813 d->optarg = d->__nextchar;
814 /* If we end this ARGV-element by taking the rest as an arg,
815 we must advance to the next element now. */
816 d->optind++;
817 }
818 else if (d->optind == argc)
819 {
820 if (print_errors)
821 {
822 /* 1003.2 specifies the format of this message. */
823 #if defined _LIBC && defined USE_IN_LIBIO
824 char *buf;
826 if (__asprintf (&buf,
827 _("%s: option requires an argument -- %c\n"),
828 argv[0], c) >= 0)
829 {
830 _IO_flockfile (stderr);
832 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
833 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
835 __fxprintf (NULL, "%s", buf);
837 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
838 _IO_funlockfile (stderr);
840 free (buf);
841 }
842 #else
843 fprintf (stderr, _("%s: option requires an argument -- %c\n"),
844 argv[0], c);
845 #endif
846 }
847 d->optopt = c;
848 if (optstring[0] == ':')
849 c = ':';
850 else
851 c = '?';
852 return c;
853 }
854 else
855 /* We already incremented `d->optind' once;
856 increment it again when taking next ARGV-elt as argument. */
857 d->optarg = argv[d->optind++];
859 /* optarg is now the argument, see if it's in the
860 table of longopts. */
862 for (d->__nextchar = nameend = d->optarg; *nameend && *nameend != '=';
863 nameend++)
864 /* Do nothing. */ ;
866 /* Test all long options for either exact match
867 or abbreviated matches. */
868 for (p = longopts, option_index = 0; p->name; p++, option_index++)
869 if (!strncmp (p->name, d->__nextchar, nameend - d->__nextchar))
870 {
871 if ((unsigned int) (nameend - d->__nextchar) == strlen (p->name))
872 {
873 /* Exact match found. */
874 pfound = p;
875 indfound = option_index;
876 exact = 1;
877 break;
878 }
879 else if (pfound == NULL)
880 {
881 /* First nonexact match found. */
882 pfound = p;
883 indfound = option_index;
884 }
885 else
886 /* Second or later nonexact match found. */
887 ambig = 1;
888 }
889 if (ambig && !exact)
890 {
891 if (print_errors)
892 {
893 #if defined _LIBC && defined USE_IN_LIBIO
894 char *buf;
896 if (__asprintf (&buf, _("%s: option `-W %s' is ambiguous\n"),
897 argv[0], argv[d->optind]) >= 0)
898 {
899 _IO_flockfile (stderr);
901 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
902 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
904 __fxprintf (NULL, "%s", buf);
906 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
907 _IO_funlockfile (stderr);
909 free (buf);
910 }
911 #else
912 fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"),
913 argv[0], argv[d->optind]);
914 #endif
915 }
916 d->__nextchar += strlen (d->__nextchar);
917 d->optind++;
918 return '?';
919 }
920 if (pfound != NULL)
921 {
922 option_index = indfound;
923 if (*nameend)
924 {
925 /* Don't test has_arg with >, because some C compilers don't
926 allow it to be used on enums. */
927 if (pfound->has_arg)
928 d->optarg = nameend + 1;
929 else
930 {
931 if (print_errors)
932 {
933 #if defined _LIBC && defined USE_IN_LIBIO
934 char *buf;
936 if (__asprintf (&buf, _("\
937 %s: option `-W %s' doesn't allow an argument\n"),
938 argv[0], pfound->name) >= 0)
939 {
940 _IO_flockfile (stderr);
942 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
943 ((_IO_FILE *) stderr)->_flags2
944 |= _IO_FLAGS2_NOTCANCEL;
946 __fxprintf (NULL, "%s", buf);
948 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
949 _IO_funlockfile (stderr);
951 free (buf);
952 }
953 #else
954 fprintf (stderr, _("\
955 %s: option `-W %s' doesn't allow an argument\n"),
956 argv[0], pfound->name);
957 #endif
958 }
960 d->__nextchar += strlen (d->__nextchar);
961 return '?';
962 }
963 }
964 else if (pfound->has_arg == 1)
965 {
966 if (d->optind < argc)
967 d->optarg = argv[d->optind++];
968 else
969 {
970 if (print_errors)
971 {
972 #if defined _LIBC && defined USE_IN_LIBIO
973 char *buf;
975 if (__asprintf (&buf, _("\
976 %s: option `%s' requires an argument\n"),
977 argv[0], argv[d->optind - 1]) >= 0)
978 {
979 _IO_flockfile (stderr);
981 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
982 ((_IO_FILE *) stderr)->_flags2
983 |= _IO_FLAGS2_NOTCANCEL;
985 __fxprintf (NULL, "%s", buf);
987 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
988 _IO_funlockfile (stderr);
990 free (buf);
991 }
992 #else
993 fprintf (stderr,
994 _("%s: option `%s' requires an argument\n"),
995 argv[0], argv[d->optind - 1]);
996 #endif
997 }
998 d->__nextchar += strlen (d->__nextchar);
999 return optstring[0] == ':' ? ':' : '?';
1000 }
1001 }
1002 d->__nextchar += strlen (d->__nextchar);
1003 if (longind != NULL)
1004 *longind = option_index;
1005 if (pfound->flag)
1006 {
1007 *(pfound->flag) = pfound->val;
1008 return 0;
1009 }
1010 return pfound->val;
1011 }
1012 d->__nextchar = NULL;
1013 return 'W'; /* Let the application handle it. */
1014 }
1015 if (temp[1] == ':')
1016 {
1017 if (temp[2] == ':')
1018 {
1019 /* This is an option that accepts an argument optionally. */
1020 if (*d->__nextchar != '\0')
1021 {
1022 d->optarg = d->__nextchar;
1023 d->optind++;
1024 }
1025 else
1026 d->optarg = NULL;
1027 d->__nextchar = NULL;
1028 }
1029 else
1030 {
1031 /* This is an option that requires an argument. */
1032 if (*d->__nextchar != '\0')
1033 {
1034 d->optarg = d->__nextchar;
1035 /* If we end this ARGV-element by taking the rest as an arg,
1036 we must advance to the next element now. */
1037 d->optind++;
1038 }
1039 else if (d->optind == argc)
1040 {
1041 if (print_errors)
1042 {
1043 /* 1003.2 specifies the format of this message. */
1044 #if defined _LIBC && defined USE_IN_LIBIO
1045 char *buf;
1047 if (__asprintf (&buf, _("\
1048 %s: option requires an argument -- %c\n"),
1049 argv[0], c) >= 0)
1050 {
1051 _IO_flockfile (stderr);
1053 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
1054 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
1056 __fxprintf (NULL, "%s", buf);
1058 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
1059 _IO_funlockfile (stderr);
1061 free (buf);
1062 }
1063 #else
1064 fprintf (stderr,
1065 _("%s: option requires an argument -- %c\n"),
1066 argv[0], c);
1067 #endif
1068 }
1069 d->optopt = c;
1070 if (optstring[0] == ':')
1071 c = ':';
1072 else
1073 c = '?';
1074 }
1075 else
1076 /* We already incremented `optind' once;
1077 increment it again when taking next ARGV-elt as argument. */
1078 d->optarg = argv[d->optind++];
1079 d->__nextchar = NULL;
1080 }
1081 }
1082 return c;
1083 }
1084 }
1086 int
1087 _getopt_internal (int argc, char **argv, const char *optstring,
1088 const struct option *longopts, int *longind,
1089 int long_only, int posixly_correct)
1090 {
1091 int result;
1093 getopt_data.optind = optind;
1094 getopt_data.opterr = opterr;
1096 result = _getopt_internal_r (argc, argv, optstring, longopts, longind,
1097 long_only, posixly_correct, &getopt_data);
1099 optind = getopt_data.optind;
1100 optarg = getopt_data.optarg;
1101 optopt = getopt_data.optopt;
1103 return result;
1104 }
1106 /* glibc gets a LSB-compliant getopt.
1107 Standalone applications get a POSIX-compliant getopt. */
1108 #if _LIBC
1109 enum { POSIXLY_CORRECT = 0 };
1110 #else
1111 enum { POSIXLY_CORRECT = 1 };
1112 #endif
1114 int
1115 getopt (int argc, char *const *argv, const char *optstring)
1116 {
1117 return _getopt_internal (argc, (char **) argv, optstring, NULL, NULL, 0,
1118 POSIXLY_CORRECT);
1119 }
1121 \f
1122 #ifdef TEST
1124 /* Compile with -DTEST to make an executable for use in testing
1125 the above definition of `getopt'. */
1127 int
1128 main (int argc, char **argv)
1129 {
1130 int c;
1131 int digit_optind = 0;
1133 while (1)
1134 {
1135 int this_option_optind = optind ? optind : 1;
1137 c = getopt (argc, argv, "abc:d:0123456789");
1138 if (c == -1)
1139 break;
1141 switch (c)
1142 {
1143 case '0':
1144 case '1':
1145 case '2':
1146 case '3':
1147 case '4':
1148 case '5':
1149 case '6':
1150 case '7':
1151 case '8':
1152 case '9':
1153 if (digit_optind != 0 && digit_optind != this_option_optind)
1154 printf ("digits occur in two different argv-elements.\n");
1155 digit_optind = this_option_optind;
1156 printf ("option %c\n", c);
1157 break;
1159 case 'a':
1160 printf ("option a\n");
1161 break;
1163 case 'b':
1164 printf ("option b\n");
1165 break;
1167 case 'c':
1168 printf ("option c with value `%s'\n", optarg);
1169 break;
1171 case '?':
1172 break;
1174 default:
1175 printf ("?? getopt returned character code 0%o ??\n", c);
1176 }
1177 }
1179 if (optind < argc)
1180 {
1181 printf ("non-option ARGV-elements: ");
1182 while (optind < argc)
1183 printf ("%s ", argv[optind++]);
1184 printf ("\n");
1185 }
1187 exit (0);
1188 }
1190 #endif /* TEST */