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date Fri, 29 Oct 2010 19:20:39 -0600
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1 /* Getopt for GNU.
2 NOTE: getopt is 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) 1987-1996, 1998-2004, 2006, 2008-2010 Free Software
6 Foundation, Inc.
7 This file is part of the GNU C Library.
8
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.
13
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.
18
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
22 #ifndef _LIBC
23 # include <config.h>
24 #endif
25
26 #include "getopt.h"
27
28 #include <stdio.h>
29 #include <stdlib.h>
30 #include <string.h>
31 #include <unistd.h>
32
33 #ifdef _LIBC
34 # include <libintl.h>
35 #else
36 # include "gettext.h"
37 # define _(msgid) gettext (msgid)
38 #endif
39
40 #if defined _LIBC && defined USE_IN_LIBIO
41 # include <wchar.h>
42 #endif
43
44 #ifndef attribute_hidden
45 # define attribute_hidden
46 #endif
47
48 /* This version of `getopt' appears to the caller like standard Unix `getopt'
49 but it behaves differently for the user, since it allows the user
50 to intersperse the options with the other arguments.
51
52 As `getopt_long' works, it permutes the elements of ARGV so that,
53 when it is done, all the options precede everything else. Thus
54 all application programs are extended to handle flexible argument order.
55
56 Using `getopt' or setting the environment variable POSIXLY_CORRECT
57 disables permutation.
58 Then the behavior is completely standard.
59
60 GNU application programs can use a third alternative mode in which
61 they can distinguish the relative order of options and other arguments. */
62
63 #include "getopt_int.h"
64
65 /* For communication from `getopt' to the caller.
66 When `getopt' finds an option that takes an argument,
67 the argument value is returned here.
68 Also, when `ordering' is RETURN_IN_ORDER,
69 each non-option ARGV-element is returned here. */
70
71 char *optarg;
72
73 /* Index in ARGV of the next element to be scanned.
74 This is used for communication to and from the caller
75 and for communication between successive calls to `getopt'.
76
77 On entry to `getopt', zero means this is the first call; initialize.
78
79 When `getopt' returns -1, this is the index of the first of the
80 non-option elements that the caller should itself scan.
81
82 Otherwise, `optind' communicates from one call to the next
83 how much of ARGV has been scanned so far. */
84
85 /* 1003.2 says this must be 1 before any call. */
86 int optind = 1;
87
88 /* Callers store zero here to inhibit the error message
89 for unrecognized options. */
90
91 int opterr = 1;
92
93 /* Set to an option character which was unrecognized.
94 This must be initialized on some systems to avoid linking in the
95 system's own getopt implementation. */
96
97 int optopt = '?';
98
99 /* Keep a global copy of all internal members of getopt_data. */
100
101 static struct _getopt_data getopt_data;
102
103
104 #if defined HAVE_DECL_GETENV && !HAVE_DECL_GETENV
105 extern char *getenv ();
106 #endif
107
108 #ifdef _LIBC
109 /* Stored original parameters.
110 XXX This is no good solution. We should rather copy the args so
111 that we can compare them later. But we must not use malloc(3). */
112 extern int __libc_argc;
113 extern char **__libc_argv;
114
115 /* Bash 2.0 gives us an environment variable containing flags
116 indicating ARGV elements that should not be considered arguments. */
117
118 # ifdef USE_NONOPTION_FLAGS
119 /* Defined in getopt_init.c */
120 extern char *__getopt_nonoption_flags;
121 # endif
122
123 # ifdef USE_NONOPTION_FLAGS
124 # define SWAP_FLAGS(ch1, ch2) \
125 if (d->__nonoption_flags_len > 0) \
126 { \
127 char __tmp = __getopt_nonoption_flags[ch1]; \
128 __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \
129 __getopt_nonoption_flags[ch2] = __tmp; \
130 }
131 # else
132 # define SWAP_FLAGS(ch1, ch2)
133 # endif
134 #else /* !_LIBC */
135 # define SWAP_FLAGS(ch1, ch2)
136 #endif /* _LIBC */
137
138 /* Exchange two adjacent subsequences of ARGV.
139 One subsequence is elements [first_nonopt,last_nonopt)
140 which contains all the non-options that have been skipped so far.
141 The other is elements [last_nonopt,optind), which contains all
142 the options processed since those non-options were skipped.
143
144 `first_nonopt' and `last_nonopt' are relocated so that they describe
145 the new indices of the non-options in ARGV after they are moved. */
146
147 static void
148 exchange (char **argv, struct _getopt_data *d)
149 {
150 int bottom = d->__first_nonopt;
151 int middle = d->__last_nonopt;
152 int top = d->optind;
153 char *tem;
154
155 /* Exchange the shorter segment with the far end of the longer segment.
156 That puts the shorter segment into the right place.
157 It leaves the longer segment in the right place overall,
158 but it consists of two parts that need to be swapped next. */
159
160 #if defined _LIBC && defined USE_NONOPTION_FLAGS
161 /* First make sure the handling of the `__getopt_nonoption_flags'
162 string can work normally. Our top argument must be in the range
163 of the string. */
164 if (d->__nonoption_flags_len > 0 && top >= d->__nonoption_flags_max_len)
165 {
166 /* We must extend the array. The user plays games with us and
167 presents new arguments. */
168 char *new_str = malloc (top + 1);
169 if (new_str == NULL)
170 d->__nonoption_flags_len = d->__nonoption_flags_max_len = 0;
171 else
172 {
173 memset (__mempcpy (new_str, __getopt_nonoption_flags,
174 d->__nonoption_flags_max_len),
175 '\0', top + 1 - d->__nonoption_flags_max_len);
176 d->__nonoption_flags_max_len = top + 1;
177 __getopt_nonoption_flags = new_str;
178 }
179 }
180 #endif
181
182 while (top > middle && middle > bottom)
183 {
184 if (top - middle > middle - bottom)
185 {
186 /* Bottom segment is the short one. */
187 int len = middle - bottom;
188 register int i;
189
190 /* Swap it with the top part of the top segment. */
191 for (i = 0; i < len; i++)
192 {
193 tem = argv[bottom + i];
194 argv[bottom + i] = argv[top - (middle - bottom) + i];
195 argv[top - (middle - bottom) + i] = tem;
196 SWAP_FLAGS (bottom + i, top - (middle - bottom) + i);
197 }
198 /* Exclude the moved bottom segment from further swapping. */
199 top -= len;
200 }
201 else
202 {
203 /* Top segment is the short one. */
204 int len = top - middle;
205 register int i;
206
207 /* Swap it with the bottom part of the bottom segment. */
208 for (i = 0; i < len; i++)
209 {
210 tem = argv[bottom + i];
211 argv[bottom + i] = argv[middle + i];
212 argv[middle + i] = tem;
213 SWAP_FLAGS (bottom + i, middle + i);
214 }
215 /* Exclude the moved top segment from further swapping. */
216 bottom += len;
217 }
218 }
219
220 /* Update records for the slots the non-options now occupy. */
221
222 d->__first_nonopt += (d->optind - d->__last_nonopt);
223 d->__last_nonopt = d->optind;
224 }
225
226 /* Initialize the internal data when the first call is made. */
227
228 static const char *
229 _getopt_initialize (int argc _GL_UNUSED,
230 char **argv _GL_UNUSED, const char *optstring,
231 struct _getopt_data *d, int posixly_correct)
232 {
233 /* Start processing options with ARGV-element 1 (since ARGV-element 0
234 is the program name); the sequence of previously skipped
235 non-option ARGV-elements is empty. */
236
237 d->__first_nonopt = d->__last_nonopt = d->optind;
238
239 d->__nextchar = NULL;
240
241 d->__posixly_correct = posixly_correct || !!getenv ("POSIXLY_CORRECT");
242
243 /* Determine how to handle the ordering of options and nonoptions. */
244
245 if (optstring[0] == '-')
246 {
247 d->__ordering = RETURN_IN_ORDER;
248 ++optstring;
249 }
250 else if (optstring[0] == '+')
251 {
252 d->__ordering = REQUIRE_ORDER;
253 ++optstring;
254 }
255 else if (d->__posixly_correct)
256 d->__ordering = REQUIRE_ORDER;
257 else
258 d->__ordering = PERMUTE;
259
260 #if defined _LIBC && defined USE_NONOPTION_FLAGS
261 if (!d->__posixly_correct
262 && argc == __libc_argc && argv == __libc_argv)
263 {
264 if (d->__nonoption_flags_max_len == 0)
265 {
266 if (__getopt_nonoption_flags == NULL
267 || __getopt_nonoption_flags[0] == '\0')
268 d->__nonoption_flags_max_len = -1;
269 else
270 {
271 const char *orig_str = __getopt_nonoption_flags;
272 int len = d->__nonoption_flags_max_len = strlen (orig_str);
273 if (d->__nonoption_flags_max_len < argc)
274 d->__nonoption_flags_max_len = argc;
275 __getopt_nonoption_flags =
276 (char *) malloc (d->__nonoption_flags_max_len);
277 if (__getopt_nonoption_flags == NULL)
278 d->__nonoption_flags_max_len = -1;
279 else
280 memset (__mempcpy (__getopt_nonoption_flags, orig_str, len),
281 '\0', d->__nonoption_flags_max_len - len);
282 }
283 }
284 d->__nonoption_flags_len = d->__nonoption_flags_max_len;
285 }
286 else
287 d->__nonoption_flags_len = 0;
288 #endif
289
290 return optstring;
291 }
292
293 /* Scan elements of ARGV (whose length is ARGC) for option characters
294 given in OPTSTRING.
295
296 If an element of ARGV starts with '-', and is not exactly "-" or "--",
297 then it is an option element. The characters of this element
298 (aside from the initial '-') are option characters. If `getopt'
299 is called repeatedly, it returns successively each of the option characters
300 from each of the option elements.
301
302 If `getopt' finds another option character, it returns that character,
303 updating `optind' and `nextchar' so that the next call to `getopt' can
304 resume the scan with the following option character or ARGV-element.
305
306 If there are no more option characters, `getopt' returns -1.
307 Then `optind' is the index in ARGV of the first ARGV-element
308 that is not an option. (The ARGV-elements have been permuted
309 so that those that are not options now come last.)
310
311 OPTSTRING is a string containing the legitimate option characters.
312 If an option character is seen that is not listed in OPTSTRING,
313 return '?' after printing an error message. If you set `opterr' to
314 zero, the error message is suppressed but we still return '?'.
315
316 If a char in OPTSTRING is followed by a colon, that means it wants an arg,
317 so the following text in the same ARGV-element, or the text of the following
318 ARGV-element, is returned in `optarg'. Two colons mean an option that
319 wants an optional arg; if there is text in the current ARGV-element,
320 it is returned in `optarg', otherwise `optarg' is set to zero.
321
322 If OPTSTRING starts with `-' or `+', it requests different methods of
323 handling the non-option ARGV-elements.
324 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
325
326 Long-named options begin with `--' instead of `-'.
327 Their names may be abbreviated as long as the abbreviation is unique
328 or is an exact match for some defined option. If they have an
329 argument, it follows the option name in the same ARGV-element, separated
330 from the option name by a `=', or else the in next ARGV-element.
331 When `getopt' finds a long-named option, it returns 0 if that option's
332 `flag' field is nonzero, the value of the option's `val' field
333 if the `flag' field is zero.
334
335 The elements of ARGV aren't really const, because we permute them.
336 But we pretend they're const in the prototype to be compatible
337 with other systems.
338
339 LONGOPTS is a vector of `struct option' terminated by an
340 element containing a name which is zero.
341
342 LONGIND returns the index in LONGOPT of the long-named option found.
343 It is only valid when a long-named option has been found by the most
344 recent call.
345
346 If LONG_ONLY is nonzero, '-' as well as '--' can introduce
347 long-named options. */
348
349 int
350 _getopt_internal_r (int argc, char **argv, const char *optstring,
351 const struct option *longopts, int *longind,
352 int long_only, struct _getopt_data *d, int posixly_correct)
353 {
354 int print_errors = d->opterr;
355 if (optstring[0] == ':')
356 print_errors = 0;
357
358 if (argc < 1)
359 return -1;
360
361 d->optarg = NULL;
362
363 if (d->optind == 0 || !d->__initialized)
364 {
365 if (d->optind == 0)
366 d->optind = 1; /* Don't scan ARGV[0], the program name. */
367 optstring = _getopt_initialize (argc, argv, optstring, d,
368 posixly_correct);
369 d->__initialized = 1;
370 }
371
372 /* Test whether ARGV[optind] points to a non-option argument.
373 Either it does not have option syntax, or there is an environment flag
374 from the shell indicating it is not an option. The later information
375 is only used when the used in the GNU libc. */
376 #if defined _LIBC && defined USE_NONOPTION_FLAGS
377 # define NONOPTION_P (argv[d->optind][0] != '-' || argv[d->optind][1] == '\0' \
378 || (d->optind < d->__nonoption_flags_len \
379 && __getopt_nonoption_flags[d->optind] == '1'))
380 #else
381 # define NONOPTION_P (argv[d->optind][0] != '-' || argv[d->optind][1] == '\0')
382 #endif
383
384 if (d->__nextchar == NULL || *d->__nextchar == '\0')
385 {
386 /* Advance to the next ARGV-element. */
387
388 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been
389 moved back by the user (who may also have changed the arguments). */
390 if (d->__last_nonopt > d->optind)
391 d->__last_nonopt = d->optind;
392 if (d->__first_nonopt > d->optind)
393 d->__first_nonopt = d->optind;
394
395 if (d->__ordering == PERMUTE)
396 {
397 /* If we have just processed some options following some non-options,
398 exchange them so that the options come first. */
399
400 if (d->__first_nonopt != d->__last_nonopt
401 && d->__last_nonopt != d->optind)
402 exchange ((char **) argv, d);
403 else if (d->__last_nonopt != d->optind)
404 d->__first_nonopt = d->optind;
405
406 /* Skip any additional non-options
407 and extend the range of non-options previously skipped. */
408
409 while (d->optind < argc && NONOPTION_P)
410 d->optind++;
411 d->__last_nonopt = d->optind;
412 }
413
414 /* The special ARGV-element `--' means premature end of options.
415 Skip it like a null option,
416 then exchange with previous non-options as if it were an option,
417 then skip everything else like a non-option. */
418
419 if (d->optind != argc && !strcmp (argv[d->optind], "--"))
420 {
421 d->optind++;
422
423 if (d->__first_nonopt != d->__last_nonopt
424 && d->__last_nonopt != d->optind)
425 exchange ((char **) argv, d);
426 else if (d->__first_nonopt == d->__last_nonopt)
427 d->__first_nonopt = d->optind;
428 d->__last_nonopt = argc;
429
430 d->optind = argc;
431 }
432
433 /* If we have done all the ARGV-elements, stop the scan
434 and back over any non-options that we skipped and permuted. */
435
436 if (d->optind == argc)
437 {
438 /* Set the next-arg-index to point at the non-options
439 that we previously skipped, so the caller will digest them. */
440 if (d->__first_nonopt != d->__last_nonopt)
441 d->optind = d->__first_nonopt;
442 return -1;
443 }
444
445 /* If we have come to a non-option and did not permute it,
446 either stop the scan or describe it to the caller and pass it by. */
447
448 if (NONOPTION_P)
449 {
450 if (d->__ordering == REQUIRE_ORDER)
451 return -1;
452 d->optarg = argv[d->optind++];
453 return 1;
454 }
455
456 /* We have found another option-ARGV-element.
457 Skip the initial punctuation. */
458
459 d->__nextchar = (argv[d->optind] + 1
460 + (longopts != NULL && argv[d->optind][1] == '-'));
461 }
462
463 /* Decode the current option-ARGV-element. */
464
465 /* Check whether the ARGV-element is a long option.
466
467 If long_only and the ARGV-element has the form "-f", where f is
468 a valid short option, don't consider it an abbreviated form of
469 a long option that starts with f. Otherwise there would be no
470 way to give the -f short option.
471
472 On the other hand, if there's a long option "fubar" and
473 the ARGV-element is "-fu", do consider that an abbreviation of
474 the long option, just like "--fu", and not "-f" with arg "u".
475
476 This distinction seems to be the most useful approach. */
477
478 if (longopts != NULL
479 && (argv[d->optind][1] == '-'
480 || (long_only && (argv[d->optind][2]
481 || !strchr (optstring, argv[d->optind][1])))))
482 {
483 char *nameend;
484 const struct option *p;
485 const struct option *pfound = NULL;
486 int exact = 0;
487 int ambig = 0;
488 int indfound = -1;
489 int option_index;
490
491 for (nameend = d->__nextchar; *nameend && *nameend != '='; nameend++)
492 /* Do nothing. */ ;
493
494 /* Test all long options for either exact match
495 or abbreviated matches. */
496 for (p = longopts, option_index = 0; p->name; p++, option_index++)
497 if (!strncmp (p->name, d->__nextchar, nameend - d->__nextchar))
498 {
499 if ((unsigned int) (nameend - d->__nextchar)
500 == (unsigned int) strlen (p->name))
501 {
502 /* Exact match found. */
503 pfound = p;
504 indfound = option_index;
505 exact = 1;
506 break;
507 }
508 else if (pfound == NULL)
509 {
510 /* First nonexact match found. */
511 pfound = p;
512 indfound = option_index;
513 }
514 else if (long_only
515 || pfound->has_arg != p->has_arg
516 || pfound->flag != p->flag
517 || pfound->val != p->val)
518 /* Second or later nonexact match found. */
519 ambig = 1;
520 }
521
522 if (ambig && !exact)
523 {
524 if (print_errors)
525 {
526 #if defined _LIBC && defined USE_IN_LIBIO
527 char *buf;
528
529 if (__asprintf (&buf, _("%s: option '%s' is ambiguous\n"),
530 argv[0], argv[d->optind]) >= 0)
531 {
532 _IO_flockfile (stderr);
533
534 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
535 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
536
537 __fxprintf (NULL, "%s", buf);
538
539 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
540 _IO_funlockfile (stderr);
541
542 free (buf);
543 }
544 #else
545 fprintf (stderr, _("%s: option '%s' is ambiguous\n"),
546 argv[0], argv[d->optind]);
547 #endif
548 }
549 d->__nextchar += strlen (d->__nextchar);
550 d->optind++;
551 d->optopt = 0;
552 return '?';
553 }
554
555 if (pfound != NULL)
556 {
557 option_index = indfound;
558 d->optind++;
559 if (*nameend)
560 {
561 /* Don't test has_arg with >, because some C compilers don't
562 allow it to be used on enums. */
563 if (pfound->has_arg)
564 d->optarg = nameend + 1;
565 else
566 {
567 if (print_errors)
568 {
569 #if defined _LIBC && defined USE_IN_LIBIO
570 char *buf;
571 int n;
572 #endif
573
574 if (argv[d->optind - 1][1] == '-')
575 {
576 /* --option */
577 #if defined _LIBC && defined USE_IN_LIBIO
578 n = __asprintf (&buf, _("\
579 %s: option '--%s' doesn't allow an argument\n"),
580 argv[0], pfound->name);
581 #else
582 fprintf (stderr, _("\
583 %s: option '--%s' doesn't allow an argument\n"),
584 argv[0], pfound->name);
585 #endif
586 }
587 else
588 {
589 /* +option or -option */
590 #if defined _LIBC && defined USE_IN_LIBIO
591 n = __asprintf (&buf, _("\
592 %s: option '%c%s' doesn't allow an argument\n"),
593 argv[0], argv[d->optind - 1][0],
594 pfound->name);
595 #else
596 fprintf (stderr, _("\
597 %s: option '%c%s' doesn't allow an argument\n"),
598 argv[0], argv[d->optind - 1][0],
599 pfound->name);
600 #endif
601 }
602
603 #if defined _LIBC && defined USE_IN_LIBIO
604 if (n >= 0)
605 {
606 _IO_flockfile (stderr);
607
608 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
609 ((_IO_FILE *) stderr)->_flags2
610 |= _IO_FLAGS2_NOTCANCEL;
611
612 __fxprintf (NULL, "%s", buf);
613
614 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
615 _IO_funlockfile (stderr);
616
617 free (buf);
618 }
619 #endif
620 }
621
622 d->__nextchar += strlen (d->__nextchar);
623
624 d->optopt = pfound->val;
625 return '?';
626 }
627 }
628 else if (pfound->has_arg == 1)
629 {
630 if (d->optind < argc)
631 d->optarg = argv[d->optind++];
632 else
633 {
634 if (print_errors)
635 {
636 #if defined _LIBC && defined USE_IN_LIBIO
637 char *buf;
638
639 if (__asprintf (&buf, _("\
640 %s: option '%s' requires an argument\n"),
641 argv[0], argv[d->optind - 1]) >= 0)
642 {
643 _IO_flockfile (stderr);
644
645 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
646 ((_IO_FILE *) stderr)->_flags2
647 |= _IO_FLAGS2_NOTCANCEL;
648
649 __fxprintf (NULL, "%s", buf);
650
651 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
652 _IO_funlockfile (stderr);
653
654 free (buf);
655 }
656 #else
657 fprintf (stderr,
658 _("%s: option '%s' requires an argument\n"),
659 argv[0], argv[d->optind - 1]);
660 #endif
661 }
662 d->__nextchar += strlen (d->__nextchar);
663 d->optopt = pfound->val;
664 return optstring[0] == ':' ? ':' : '?';
665 }
666 }
667 d->__nextchar += strlen (d->__nextchar);
668 if (longind != NULL)
669 *longind = option_index;
670 if (pfound->flag)
671 {
672 *(pfound->flag) = pfound->val;
673 return 0;
674 }
675 return pfound->val;
676 }
677
678 /* Can't find it as a long option. If this is not getopt_long_only,
679 or the option starts with '--' or is not a valid short
680 option, then it's an error.
681 Otherwise interpret it as a short option. */
682 if (!long_only || argv[d->optind][1] == '-'
683 || strchr (optstring, *d->__nextchar) == NULL)
684 {
685 if (print_errors)
686 {
687 #if defined _LIBC && defined USE_IN_LIBIO
688 char *buf;
689 int n;
690 #endif
691
692 if (argv[d->optind][1] == '-')
693 {
694 /* --option */
695 #if defined _LIBC && defined USE_IN_LIBIO
696 n = __asprintf (&buf, _("%s: unrecognized option '--%s'\n"),
697 argv[0], d->__nextchar);
698 #else
699 fprintf (stderr, _("%s: unrecognized option '--%s'\n"),
700 argv[0], d->__nextchar);
701 #endif
702 }
703 else
704 {
705 /* +option or -option */
706 #if defined _LIBC && defined USE_IN_LIBIO
707 n = __asprintf (&buf, _("%s: unrecognized option '%c%s'\n"),
708 argv[0], argv[d->optind][0], d->__nextchar);
709 #else
710 fprintf (stderr, _("%s: unrecognized option '%c%s'\n"),
711 argv[0], argv[d->optind][0], d->__nextchar);
712 #endif
713 }
714
715 #if defined _LIBC && defined USE_IN_LIBIO
716 if (n >= 0)
717 {
718 _IO_flockfile (stderr);
719
720 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
721 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
722
723 __fxprintf (NULL, "%s", buf);
724
725 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
726 _IO_funlockfile (stderr);
727
728 free (buf);
729 }
730 #endif
731 }
732 d->__nextchar = (char *) "";
733 d->optind++;
734 d->optopt = 0;
735 return '?';
736 }
737 }
738
739 /* Look at and handle the next short option-character. */
740
741 {
742 char c = *d->__nextchar++;
743 char *temp = strchr (optstring, c);
744
745 /* Increment `optind' when we start to process its last character. */
746 if (*d->__nextchar == '\0')
747 ++d->optind;
748
749 if (temp == NULL || c == ':')
750 {
751 if (print_errors)
752 {
753 #if defined _LIBC && defined USE_IN_LIBIO
754 char *buf;
755 int n;
756 #endif
757
758 #if defined _LIBC && defined USE_IN_LIBIO
759 n = __asprintf (&buf, _("%s: invalid option -- '%c'\n"),
760 argv[0], c);
761 #else
762 fprintf (stderr, _("%s: invalid option -- '%c'\n"), argv[0], c);
763 #endif
764
765 #if defined _LIBC && defined USE_IN_LIBIO
766 if (n >= 0)
767 {
768 _IO_flockfile (stderr);
769
770 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
771 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
772
773 __fxprintf (NULL, "%s", buf);
774
775 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
776 _IO_funlockfile (stderr);
777
778 free (buf);
779 }
780 #endif
781 }
782 d->optopt = c;
783 return '?';
784 }
785 /* Convenience. Treat POSIX -W foo same as long option --foo */
786 if (temp[0] == 'W' && temp[1] == ';')
787 {
788 char *nameend;
789 const struct option *p;
790 const struct option *pfound = NULL;
791 int exact = 0;
792 int ambig = 0;
793 int indfound = 0;
794 int option_index;
795
796 /* This is an option that requires an argument. */
797 if (*d->__nextchar != '\0')
798 {
799 d->optarg = d->__nextchar;
800 /* If we end this ARGV-element by taking the rest as an arg,
801 we must advance to the next element now. */
802 d->optind++;
803 }
804 else if (d->optind == argc)
805 {
806 if (print_errors)
807 {
808 #if defined _LIBC && defined USE_IN_LIBIO
809 char *buf;
810
811 if (__asprintf (&buf,
812 _("%s: option requires an argument -- '%c'\n"),
813 argv[0], c) >= 0)
814 {
815 _IO_flockfile (stderr);
816
817 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
818 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
819
820 __fxprintf (NULL, "%s", buf);
821
822 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
823 _IO_funlockfile (stderr);
824
825 free (buf);
826 }
827 #else
828 fprintf (stderr,
829 _("%s: option requires an argument -- '%c'\n"),
830 argv[0], c);
831 #endif
832 }
833 d->optopt = c;
834 if (optstring[0] == ':')
835 c = ':';
836 else
837 c = '?';
838 return c;
839 }
840 else
841 /* We already incremented `d->optind' once;
842 increment it again when taking next ARGV-elt as argument. */
843 d->optarg = argv[d->optind++];
844
845 /* optarg is now the argument, see if it's in the
846 table of longopts. */
847
848 for (d->__nextchar = nameend = d->optarg; *nameend && *nameend != '=';
849 nameend++)
850 /* Do nothing. */ ;
851
852 /* Test all long options for either exact match
853 or abbreviated matches. */
854 for (p = longopts, option_index = 0; p->name; p++, option_index++)
855 if (!strncmp (p->name, d->__nextchar, nameend - d->__nextchar))
856 {
857 if ((unsigned int) (nameend - d->__nextchar) == strlen (p->name))
858 {
859 /* Exact match found. */
860 pfound = p;
861 indfound = option_index;
862 exact = 1;
863 break;
864 }
865 else if (pfound == NULL)
866 {
867 /* First nonexact match found. */
868 pfound = p;
869 indfound = option_index;
870 }
871 else
872 /* Second or later nonexact match found. */
873 ambig = 1;
874 }
875 if (ambig && !exact)
876 {
877 if (print_errors)
878 {
879 #if defined _LIBC && defined USE_IN_LIBIO
880 char *buf;
881
882 if (__asprintf (&buf, _("%s: option '-W %s' is ambiguous\n"),
883 argv[0], argv[d->optind]) >= 0)
884 {
885 _IO_flockfile (stderr);
886
887 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
888 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
889
890 __fxprintf (NULL, "%s", buf);
891
892 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
893 _IO_funlockfile (stderr);
894
895 free (buf);
896 }
897 #else
898 fprintf (stderr, _("%s: option '-W %s' is ambiguous\n"),
899 argv[0], argv[d->optind]);
900 #endif
901 }
902 d->__nextchar += strlen (d->__nextchar);
903 d->optind++;
904 return '?';
905 }
906 if (pfound != NULL)
907 {
908 option_index = indfound;
909 if (*nameend)
910 {
911 /* Don't test has_arg with >, because some C compilers don't
912 allow it to be used on enums. */
913 if (pfound->has_arg)
914 d->optarg = nameend + 1;
915 else
916 {
917 if (print_errors)
918 {
919 #if defined _LIBC && defined USE_IN_LIBIO
920 char *buf;
921
922 if (__asprintf (&buf, _("\
923 %s: option '-W %s' doesn't allow an argument\n"),
924 argv[0], pfound->name) >= 0)
925 {
926 _IO_flockfile (stderr);
927
928 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
929 ((_IO_FILE *) stderr)->_flags2
930 |= _IO_FLAGS2_NOTCANCEL;
931
932 __fxprintf (NULL, "%s", buf);
933
934 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
935 _IO_funlockfile (stderr);
936
937 free (buf);
938 }
939 #else
940 fprintf (stderr, _("\
941 %s: option '-W %s' doesn't allow an argument\n"),
942 argv[0], pfound->name);
943 #endif
944 }
945
946 d->__nextchar += strlen (d->__nextchar);
947 return '?';
948 }
949 }
950 else if (pfound->has_arg == 1)
951 {
952 if (d->optind < argc)
953 d->optarg = argv[d->optind++];
954 else
955 {
956 if (print_errors)
957 {
958 #if defined _LIBC && defined USE_IN_LIBIO
959 char *buf;
960
961 if (__asprintf (&buf, _("\
962 %s: option '%s' requires an argument\n"),
963 argv[0], argv[d->optind - 1]) >= 0)
964 {
965 _IO_flockfile (stderr);
966
967 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
968 ((_IO_FILE *) stderr)->_flags2
969 |= _IO_FLAGS2_NOTCANCEL;
970
971 __fxprintf (NULL, "%s", buf);
972
973 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
974 _IO_funlockfile (stderr);
975
976 free (buf);
977 }
978 #else
979 fprintf (stderr,
980 _("%s: option '%s' requires an argument\n"),
981 argv[0], argv[d->optind - 1]);
982 #endif
983 }
984 d->__nextchar += strlen (d->__nextchar);
985 return optstring[0] == ':' ? ':' : '?';
986 }
987 }
988 d->__nextchar += strlen (d->__nextchar);
989 if (longind != NULL)
990 *longind = option_index;
991 if (pfound->flag)
992 {
993 *(pfound->flag) = pfound->val;
994 return 0;
995 }
996 return pfound->val;
997 }
998 d->__nextchar = NULL;
999 return 'W'; /* Let the application handle it. */
1000 }
1001 if (temp[1] == ':')
1002 {
1003 if (temp[2] == ':')
1004 {
1005 /* This is an option that accepts an argument optionally. */
1006 if (*d->__nextchar != '\0')
1007 {
1008 d->optarg = d->__nextchar;
1009 d->optind++;
1010 }
1011 else
1012 d->optarg = NULL;
1013 d->__nextchar = NULL;
1014 }
1015 else
1016 {
1017 /* This is an option that requires an argument. */
1018 if (*d->__nextchar != '\0')
1019 {
1020 d->optarg = d->__nextchar;
1021 /* If we end this ARGV-element by taking the rest as an arg,
1022 we must advance to the next element now. */
1023 d->optind++;
1024 }
1025 else if (d->optind == argc)
1026 {
1027 if (print_errors)
1028 {
1029 #if defined _LIBC && defined USE_IN_LIBIO
1030 char *buf;
1031
1032 if (__asprintf (&buf, _("\
1033 %s: option requires an argument -- '%c'\n"),
1034 argv[0], c) >= 0)
1035 {
1036 _IO_flockfile (stderr);
1037
1038 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
1039 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
1040
1041 __fxprintf (NULL, "%s", buf);
1042
1043 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
1044 _IO_funlockfile (stderr);
1045
1046 free (buf);
1047 }
1048 #else
1049 fprintf (stderr,
1050 _("%s: option requires an argument -- '%c'\n"),
1051 argv[0], c);
1052 #endif
1053 }
1054 d->optopt = c;
1055 if (optstring[0] == ':')
1056 c = ':';
1057 else
1058 c = '?';
1059 }
1060 else
1061 /* We already incremented `optind' once;
1062 increment it again when taking next ARGV-elt as argument. */
1063 d->optarg = argv[d->optind++];
1064 d->__nextchar = NULL;
1065 }
1066 }
1067 return c;
1068 }
1069 }
1070
1071 int
1072 _getopt_internal (int argc, char **argv, const char *optstring,
1073 const struct option *longopts, int *longind, int long_only,
1074 int posixly_correct)
1075 {
1076 int result;
1077
1078 getopt_data.optind = optind;
1079 getopt_data.opterr = opterr;
1080
1081 result = _getopt_internal_r (argc, argv, optstring, longopts,
1082 longind, long_only, &getopt_data,
1083 posixly_correct);
1084
1085 optind = getopt_data.optind;
1086 optarg = getopt_data.optarg;
1087 optopt = getopt_data.optopt;
1088
1089 return result;
1090 }
1091
1092 /* glibc gets a LSB-compliant getopt.
1093 Standalone applications get a POSIX-compliant getopt. */
1094 #if _LIBC
1095 enum { POSIXLY_CORRECT = 0 };
1096 #else
1097 enum { POSIXLY_CORRECT = 1 };
1098 #endif
1099
1100 int
1101 getopt (int argc, char *const *argv, const char *optstring)
1102 {
1103 return _getopt_internal (argc, (char **) argv, optstring,
1104 (const struct option *) 0,
1105 (int *) 0,
1106 0, POSIXLY_CORRECT);
1107 }
1108
1109 #ifdef _LIBC
1110 int
1111 __posix_getopt (int argc, char *const *argv, const char *optstring)
1112 {
1113 return _getopt_internal (argc, argv, optstring,
1114 (const struct option *) 0,
1115 (int *) 0,
1116 0, 1);
1117 }
1118 #endif
1119
1120
1121 #ifdef TEST
1122
1123 /* Compile with -DTEST to make an executable for use in testing
1124 the above definition of `getopt'. */
1125
1126 int
1127 main (int argc, char **argv)
1128 {
1129 int c;
1130 int digit_optind = 0;
1131
1132 while (1)
1133 {
1134 int this_option_optind = optind ? optind : 1;
1135
1136 c = getopt (argc, argv, "abc:d:0123456789");
1137 if (c == -1)
1138 break;
1139
1140 switch (c)
1141 {
1142 case '0':
1143 case '1':
1144 case '2':
1145 case '3':
1146 case '4':
1147 case '5':
1148 case '6':
1149 case '7':
1150 case '8':
1151 case '9':
1152 if (digit_optind != 0 && digit_optind != this_option_optind)
1153 printf ("digits occur in two different argv-elements.\n");
1154 digit_optind = this_option_optind;
1155 printf ("option %c\n", c);
1156 break;
1157
1158 case 'a':
1159 printf ("option a\n");
1160 break;
1161
1162 case 'b':
1163 printf ("option b\n");
1164 break;
1165
1166 case 'c':
1167 printf ("option c with value '%s'\n", optarg);
1168 break;
1169
1170 case '?':
1171 break;
1172
1173 default:
1174 printf ("?? getopt returned character code 0%o ??\n", c);
1175 }
1176 }
1177
1178 if (optind < argc)
1179 {
1180 printf ("non-option ARGV-elements: ");
1181 while (optind < argc)
1182 printf ("%s ", argv[optind++]);
1183 printf ("\n");
1184 }
1185
1186 exit (0);
1187 }
1188
1189 #endif /* TEST */