1 /* Getopt for GNU.
2 NOTE: getopt is now part of the C library, so if you don't know what
3 "Keep this file name-space clean" means, talk to drepper@gnu.org
4 before changing it!
5
6 Copyright (C) 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
7 1996, 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation,
8 Inc.
9
10 This file is part of the GNU C Library.
11
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 2, or (at your option)
15 any later version.
16
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
21
22 You should have received a copy of the GNU General Public License along
23 with this program; if not, write to the Free Software Foundation,
24 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */
25
26 /* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>.
27 Ditto for AIX 3.2 and <stdlib.h>. */
28 #ifndef _NO_PROTO
29 # define _NO_PROTO
30 #endif
31
32 #ifdef HAVE_CONFIG_H
33 # include <config.h>
34 #endif
35
36 #include <stdio.h>
37
38 /* Comment out all this code if we are using the GNU C Library, and are not
39 actually compiling the library itself. This code is part of the GNU C
40 Library, but also included in many other GNU distributions. Compiling
41 and linking in this code is a waste when using the GNU C library
42 (especially if it is a shared library). Rather than having every GNU
43 program understand `configure --with-gnu-libc' and omit the object files,
44 it is simpler to just do this in the source for each such file. */
45
46 #define GETOPT_INTERFACE_VERSION 2
47 #if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2
48 # include <gnu-versions.h>
49 # if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
50 # define ELIDE_CODE
51 # endif
52 #endif
53
54 #ifndef ELIDE_CODE
55
56
57 /* This needs to come after some library #include
58 to get __GNU_LIBRARY__ defined. */
59 #ifdef __GNU_LIBRARY__
60 /* Don't include stdlib.h for non-GNU C libraries because some of them
61 contain conflicting prototypes for getopt. */
62 # include <stdlib.h>
63 # include <unistd.h>
64 #endif /* GNU C library. */
65
66 #include <string.h>
67
68 #ifdef VMS
69 # include <unixlib.h>
70 #endif
71
72 #ifdef USEGETTEXT
73 #ifdef _LIBC
74 # include <libintl.h>
75 #else
76 /* This is for other GNU distributions with internationalized messages. */
77 # include "gettext.h"
78 #endif
79 #define _(msgid) gettext (msgid)
80 #else
81 #define _(msgid) (msgid)
82 #endif
83
84 #if defined _LIBC && defined USE_IN_LIBIO
85 # include <wchar.h>
86 #endif
87
88 #ifndef attribute_hidden
89 # define attribute_hidden
90 #endif
91
92 /* This version of `getopt' appears to the caller like standard Unix `getopt'
93 but it behaves differently for the user, since it allows the user
94 to intersperse the options with the other arguments.
95
96 As `getopt' works, it permutes the elements of ARGV so that,
97 when it is done, all the options precede everything else. Thus
98 all application programs are extended to handle flexible argument order.
99
100 Setting the environment variable POSIXLY_CORRECT disables permutation.
101 Then the behavior is completely standard.
102
103 GNU application programs can use a third alternative mode in which
104 they can distinguish the relative order of options and other arguments. */
105
106 #include "getopt.h"
107
108 /* For communication from `getopt' to the caller.
109 When `getopt' finds an option that takes an argument,
110 the argument value is returned here.
111 Also, when `ordering' is RETURN_IN_ORDER,
112 each non-option ARGV-element is returned here. */
113
114 char *optarg;
115
116 /* Index in ARGV of the next element to be scanned.
117 This is used for communication to and from the caller
118 and for communication between successive calls to `getopt'.
119
120 On entry to `getopt', zero means this is the first call; initialize.
121
122 When `getopt' returns -1, this is the index of the first of the
123 non-option elements that the caller should itself scan.
124
125 Otherwise, `optind' communicates from one call to the next
126 how much of ARGV has been scanned so far. */
127
128 /* 1003.2 says this must be 1 before any call. */
129 int optind = 1;
130
131 /* Formerly, initialization of getopt depended on optind==0, which
132 causes problems with re-calling getopt as programs generally don't
133 know that. */
134
135 int __getopt_initialized attribute_hidden;
136
137 /* The next char to be scanned in the option-element
138 in which the last option character we returned was found.
139 This allows us to pick up the scan where we left off.
140
141 If this is zero, or a null string, it means resume the scan
142 by advancing to the next ARGV-element. */
143
144 static char *nextchar;
145
146 /* Callers store zero here to inhibit the error message
147 for unrecognized options. */
148
149 int opterr = 1;
150
151 /* Set to an option character which was unrecognized.
152 This must be initialized on some systems to avoid linking in the
153 system's own getopt implementation. */
154
155 int optopt = '?';
156
157 /* Describe how to deal with options that follow non-option ARGV-elements.
158
159 If the caller did not specify anything,
160 the default is REQUIRE_ORDER if the environment variable
161 POSIXLY_CORRECT is defined, PERMUTE otherwise.
162
163 REQUIRE_ORDER means don't recognize them as options;
164 stop option processing when the first non-option is seen.
165 This is what Unix does.
166 This mode of operation is selected by either setting the environment
167 variable POSIXLY_CORRECT, or using `+' as the first character
168 of the list of option characters.
169
170 PERMUTE is the default. We permute the contents of ARGV as we scan,
171 so that eventually all the non-options are at the end. This allows options
172 to be given in any order, even with programs that were not written to
173 expect this.
174
175 RETURN_IN_ORDER is an option available to programs that were written
176 to expect options and other ARGV-elements in any order and that care about
177 the ordering of the two. We describe each non-option ARGV-element
178 as if it were the argument of an option with character code 1.
179 Using `-' as the first character of the list of option characters
180 selects this mode of operation.
181
182 The special argument `--' forces an end of option-scanning regardless
183 of the value of `ordering'. In the case of RETURN_IN_ORDER, only
184 `--' can cause `getopt' to return -1 with `optind' != ARGC. */
185
186 static enum
187 {
188 REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
189 } ordering;
190
191 /* Value of POSIXLY_CORRECT environment variable. */
192 static char *posixly_correct;
193
194 #ifndef __GNU_LIBRARY__
195
196 /* Avoid depending on library functions or files
197 whose names are inconsistent. */
198
199 #ifndef getenv
200 extern char *getenv ();
201 #endif
202
203 #endif /* not __GNU_LIBRARY__ */
204
205 /* Handle permutation of arguments. */
206
207 /* Describe the part of ARGV that contains non-options that have
208 been skipped. `first_nonopt' is the index in ARGV of the first of them;
209 `last_nonopt' is the index after the last of them. */
210
211 static int first_nonopt;
212 static int last_nonopt;
213
214 #ifdef _LIBC
215 /* Stored original parameters.
216 XXX This is no good solution. We should rather copy the args so
217 that we can compare them later. But we must not use malloc(3). */
218 extern int __libc_argc;
219 extern char **__libc_argv;
220
221 /* Bash 2.0 gives us an environment variable containing flags
222 indicating ARGV elements that should not be considered arguments. */
223
224 # ifdef USE_NONOPTION_FLAGS
225 /* Defined in getopt_init.c */
226 extern char *__getopt_nonoption_flags;
227
228 static int nonoption_flags_max_len;
229 static int nonoption_flags_len;
230 # endif
231
232 # ifdef USE_NONOPTION_FLAGS
233 # define SWAP_FLAGS(ch1, ch2) \
234 if (nonoption_flags_len > 0) \
235 { \
236 char __tmp = __getopt_nonoption_flags[ch1]; \
237 __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \
238 __getopt_nonoption_flags[ch2] = __tmp; \
239 }
240 # else
241 # define SWAP_FLAGS(ch1, ch2)
242 # endif
243 #else /* !_LIBC */
244 # define SWAP_FLAGS(ch1, ch2)
245 #endif /* _LIBC */
246
247 /* Exchange two adjacent subsequences of ARGV.
248 One subsequence is elements [first_nonopt,last_nonopt)
249 which contains all the non-options that have been skipped so far.
250 The other is elements [last_nonopt,optind), which contains all
251 the options processed since those non-options were skipped.
252
253 `first_nonopt' and `last_nonopt' are relocated so that they describe
254 the new indices of the non-options in ARGV after they are moved. */
255
256 static void
exchange(char ** argv)257 exchange (char **argv)
258 {
259 int bottom = first_nonopt;
260 int middle = last_nonopt;
261 int top = optind;
262 char *tem;
263
264 /* Exchange the shorter segment with the far end of the longer segment.
265 That puts the shorter segment into the right place.
266 It leaves the longer segment in the right place overall,
267 but it consists of two parts that need to be swapped next. */
268
269 #if defined _LIBC && defined USE_NONOPTION_FLAGS
270 /* First make sure the handling of the `__getopt_nonoption_flags'
271 string can work normally. Our top argument must be in the range
272 of the string. */
273 if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len)
274 {
275 /* We must extend the array. The user plays games with us and
276 presents new arguments. */
277 char *new_str = malloc (top + 1);
278 if (new_str == NULL)
279 nonoption_flags_len = nonoption_flags_max_len = 0;
280 else
281 {
282 memset (__mempcpy (new_str, __getopt_nonoption_flags,
283 nonoption_flags_max_len),
284 '\0', top + 1 - nonoption_flags_max_len);
285 nonoption_flags_max_len = top + 1;
286 __getopt_nonoption_flags = new_str;
287 }
288 }
289 #endif
290
291 while (top > middle && middle > bottom)
292 {
293 if (top - middle > middle - bottom)
294 {
295 /* Bottom segment is the short one. */
296 int len = middle - bottom;
297 register int i;
298
299 /* Swap it with the top part of the top segment. */
300 for (i = 0; i < len; i++)
301 {
302 tem = argv[bottom + i];
303 argv[bottom + i] = argv[top - (middle - bottom) + i];
304 argv[top - (middle - bottom) + i] = tem;
305 SWAP_FLAGS (bottom + i, top - (middle - bottom) + i);
306 }
307 /* Exclude the moved bottom segment from further swapping. */
308 top -= len;
309 }
310 else
311 {
312 /* Top segment is the short one. */
313 int len = top - middle;
314 register int i;
315
316 /* Swap it with the bottom part of the bottom segment. */
317 for (i = 0; i < len; i++)
318 {
319 tem = argv[bottom + i];
320 argv[bottom + i] = argv[middle + i];
321 argv[middle + i] = tem;
322 SWAP_FLAGS (bottom + i, middle + i);
323 }
324 /* Exclude the moved top segment from further swapping. */
325 bottom += len;
326 }
327 }
328
329 /* Update records for the slots the non-options now occupy. */
330
331 first_nonopt += (optind - last_nonopt);
332 last_nonopt = optind;
333 }
334
335 /* Initialize the internal data when the first call is made. */
336
337 static const char *
_getopt_initialize(int argc,char * const * argv,const char * optstring)338 _getopt_initialize (int argc, char *const *argv, const char *optstring)
339 {
340 /* Start processing options with ARGV-element 1 (since ARGV-element 0
341 is the program name); the sequence of previously skipped
342 non-option ARGV-elements is empty. */
343
344 first_nonopt = last_nonopt = optind;
345
346 nextchar = NULL;
347
348 posixly_correct = getenv ("POSIXLY_CORRECT");
349
350 /* Determine how to handle the ordering of options and nonoptions. */
351
352 if (optstring[0] == '-')
353 {
354 ordering = RETURN_IN_ORDER;
355 ++optstring;
356 }
357 else if (optstring[0] == '+')
358 {
359 ordering = REQUIRE_ORDER;
360 ++optstring;
361 }
362 else if (posixly_correct != NULL)
363 ordering = REQUIRE_ORDER;
364 else
365 ordering = PERMUTE;
366
367 #if defined _LIBC && defined USE_NONOPTION_FLAGS
368 if (posixly_correct == NULL
369 && argc == __libc_argc && argv == __libc_argv)
370 {
371 if (nonoption_flags_max_len == 0)
372 {
373 if (__getopt_nonoption_flags == NULL
374 || __getopt_nonoption_flags[0] == '\0')
375 nonoption_flags_max_len = -1;
376 else
377 {
378 const char *orig_str = __getopt_nonoption_flags;
379 int len = nonoption_flags_max_len = strlen (orig_str);
380 if (nonoption_flags_max_len < argc)
381 nonoption_flags_max_len = argc;
382 __getopt_nonoption_flags =
383 (char *) malloc (nonoption_flags_max_len);
384 if (__getopt_nonoption_flags == NULL)
385 nonoption_flags_max_len = -1;
386 else
387 memset (__mempcpy (__getopt_nonoption_flags, orig_str, len),
388 '\0', nonoption_flags_max_len - len);
389 }
390 }
391 nonoption_flags_len = nonoption_flags_max_len;
392 }
393 else
394 nonoption_flags_len = 0;
395 #endif
396
397 return optstring;
398 }
399
400 /* Scan elements of ARGV (whose length is ARGC) for option characters
401 given in OPTSTRING.
402
403 If an element of ARGV starts with '-', and is not exactly "-" or "--",
404 then it is an option element. The characters of this element
405 (aside from the initial '-') are option characters. If `getopt'
406 is called repeatedly, it returns successively each of the option characters
407 from each of the option elements.
408
409 If `getopt' finds another option character, it returns that character,
410 updating `optind' and `nextchar' so that the next call to `getopt' can
411 resume the scan with the following option character or ARGV-element.
412
413 If there are no more option characters, `getopt' returns -1.
414 Then `optind' is the index in ARGV of the first ARGV-element
415 that is not an option. (The ARGV-elements have been permuted
416 so that those that are not options now come last.)
417
418 OPTSTRING is a string containing the legitimate option characters.
419 If an option character is seen that is not listed in OPTSTRING,
420 return '?' after printing an error message. If you set `opterr' to
421 zero, the error message is suppressed but we still return '?'.
422
423 If a char in OPTSTRING is followed by a colon, that means it wants an arg,
424 so the following text in the same ARGV-element, or the text of the following
425 ARGV-element, is returned in `optarg'. Two colons mean an option that
426 wants an optional arg; if there is text in the current ARGV-element,
427 it is returned in `optarg', otherwise `optarg' is set to zero.
428
429 If OPTSTRING starts with `-' or `+', it requests different methods of
430 handling the non-option ARGV-elements.
431 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
432
433 Long-named options begin with `--' instead of `-'.
434 Their names may be abbreviated as long as the abbreviation is unique
435 or is an exact match for some defined option. If they have an
436 argument, it follows the option name in the same ARGV-element, separated
437 from the option name by a `=', or else the in next ARGV-element.
438 When `getopt' finds a long-named option, it returns 0 if that option's
439 `flag' field is nonzero, the value of the option's `val' field
440 if the `flag' field is zero.
441
442 The elements of ARGV aren't really const, because we permute them.
443 But we pretend they're const in the prototype to be compatible
444 with other systems.
445
446 LONGOPTS is a vector of `struct option' terminated by an
447 element containing a name which is zero.
448
449 LONGIND returns the index in LONGOPT of the long-named option found.
450 It is only valid when a long-named option has been found by the most
451 recent call.
452
453 If LONG_ONLY is nonzero, '-' as well as '--' can introduce
454 long-named options. */
455
456 int
_getopt_internal(int argc,char * const * argv,const char * optstring,const struct option * longopts,int * longind,int long_only)457 _getopt_internal (int argc, char *const *argv,
458 const char *optstring, const struct option *longopts,
459 int *longind, int long_only)
460 {
461 int print_errors = opterr;
462 if (optstring[0] == ':')
463 print_errors = 0;
464
465 if (argc < 1)
466 return -1;
467
468 optarg = NULL;
469
470 if (optind == 0 || !__getopt_initialized)
471 {
472 if (optind == 0)
473 optind = 1; /* Don't scan ARGV[0], the program name. */
474 optstring = _getopt_initialize (argc, argv, optstring);
475 __getopt_initialized = 1;
476 }
477
478 /* Test whether ARGV[optind] points to a non-option argument.
479 Either it does not have option syntax, or there is an environment flag
480 from the shell indicating it is not an option. The later information
481 is only used when the used in the GNU libc. */
482 #if defined _LIBC && defined USE_NONOPTION_FLAGS
483 # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \
484 || (optind < nonoption_flags_len \
485 && __getopt_nonoption_flags[optind] == '1'))
486 #else
487 # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0')
488 #endif
489
490 if (nextchar == NULL || *nextchar == '\0')
491 {
492 /* Advance to the next ARGV-element. */
493
494 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been
495 moved back by the user (who may also have changed the arguments). */
496 if (last_nonopt > optind)
497 last_nonopt = optind;
498 if (first_nonopt > optind)
499 first_nonopt = optind;
500
501 if (ordering == PERMUTE)
502 {
503 /* If we have just processed some options following some non-options,
504 exchange them so that the options come first. */
505
506 if (first_nonopt != last_nonopt && last_nonopt != optind)
507 exchange ((char **) argv);
508 else if (last_nonopt != optind)
509 first_nonopt = optind;
510
511 /* Skip any additional non-options
512 and extend the range of non-options previously skipped. */
513
514 while (optind < argc && NONOPTION_P)
515 optind++;
516 last_nonopt = optind;
517 }
518
519 /* The special ARGV-element `--' means premature end of options.
520 Skip it like a null option,
521 then exchange with previous non-options as if it were an option,
522 then skip everything else like a non-option. */
523
524 if (optind != argc && !strcmp (argv[optind], "--"))
525 {
526 optind++;
527
528 if (first_nonopt != last_nonopt && last_nonopt != optind)
529 exchange ((char **) argv);
530 else if (first_nonopt == last_nonopt)
531 first_nonopt = optind;
532 last_nonopt = argc;
533
534 optind = argc;
535 }
536
537 /* If we have done all the ARGV-elements, stop the scan
538 and back over any non-options that we skipped and permuted. */
539
540 if (optind == argc)
541 {
542 /* Set the next-arg-index to point at the non-options
543 that we previously skipped, so the caller will digest them. */
544 if (first_nonopt != last_nonopt)
545 optind = first_nonopt;
546 return -1;
547 }
548
549 /* If we have come to a non-option and did not permute it,
550 either stop the scan or describe it to the caller and pass it by. */
551
552 if (NONOPTION_P)
553 {
554 if (ordering == REQUIRE_ORDER)
555 return -1;
556 optarg = argv[optind++];
557 return 1;
558 }
559
560 /* We have found another option-ARGV-element.
561 Skip the initial punctuation. */
562
563 nextchar = (argv[optind] + 1
564 + (longopts != NULL && argv[optind][1] == '-'));
565 }
566
567 /* Decode the current option-ARGV-element. */
568
569 /* Check whether the ARGV-element is a long option.
570
571 If long_only and the ARGV-element has the form "-f", where f is
572 a valid short option, don't consider it an abbreviated form of
573 a long option that starts with f. Otherwise there would be no
574 way to give the -f short option.
575
576 On the other hand, if there's a long option "fubar" and
577 the ARGV-element is "-fu", do consider that an abbreviation of
578 the long option, just like "--fu", and not "-f" with arg "u".
579
580 This distinction seems to be the most useful approach. */
581
582 if (longopts != NULL
583 && (argv[optind][1] == '-'
584 || (long_only
585 && (argv[optind][2] || !strchr (optstring, argv[optind][1])))))
586 {
587 char *nameend;
588 const struct option *p;
589 const struct option *pfound = NULL;
590 int exact = 0;
591 int ambig = 0;
592 int indfound = -1;
593 int option_index;
594
595 for (nameend = nextchar; *nameend && *nameend != '='; nameend++)
596 /* Do nothing. */ ;
597
598 /* Test all long options for either exact match
599 or abbreviated matches. */
600 for (p = longopts, option_index = 0; p->name; p++, option_index++)
601 if (!strncmp (p->name, nextchar, nameend - nextchar))
602 {
603 if ((unsigned int) (nameend - nextchar)
604 == (unsigned int) strlen (p->name))
605 {
606 /* Exact match found. */
607 pfound = p;
608 indfound = option_index;
609 exact = 1;
610 break;
611 }
612 else if (pfound == NULL)
613 {
614 /* First nonexact match found. */
615 pfound = p;
616 indfound = option_index;
617 }
618 else if (long_only
619 || pfound->has_arg != p->has_arg
620 || pfound->flag != p->flag
621 || pfound->val != p->val)
622 /* Second or later nonexact match found. */
623 ambig = 1;
624 }
625
626 if (ambig && !exact)
627 {
628 if (print_errors)
629 {
630 #if defined _LIBC && defined USE_IN_LIBIO
631 char *buf;
632
633 if (__asprintf (&buf, _("%s: option `%s' is ambiguous\n"),
634 argv[0], argv[optind]) >= 0)
635 {
636
637 if (_IO_fwide (stderr, 0) > 0)
638 __fwprintf (stderr, L"%s", buf);
639 else
640 fputs (buf, stderr);
641
642 free (buf);
643 }
644 #else
645 fprintf (stderr, _("%s: option `%s' is ambiguous\n"),
646 argv[0], argv[optind]);
647 #endif
648 }
649 nextchar += strlen (nextchar);
650 optind++;
651 optopt = 0;
652 return '?';
653 }
654
655 if (pfound != NULL)
656 {
657 option_index = indfound;
658 optind++;
659 if (*nameend)
660 {
661 /* Don't test has_arg with >, because some C compilers don't
662 allow it to be used on enums. */
663 if (pfound->has_arg)
664 optarg = nameend + 1;
665 else
666 {
667 if (print_errors)
668 {
669 #if defined _LIBC && defined USE_IN_LIBIO
670 char *buf;
671 int n;
672 #endif
673
674 if (argv[optind - 1][1] == '-')
675 {
676 /* --option */
677 #if defined _LIBC && defined USE_IN_LIBIO
678 n = __asprintf (&buf, _("\
679 %s: option `--%s' doesn't allow an argument\n"),
680 argv[0], pfound->name);
681 #else
682 fprintf (stderr, _("\
683 %s: option `--%s' doesn't allow an argument\n"),
684 argv[0], pfound->name);
685 #endif
686 }
687 else
688 {
689 /* +option or -option */
690 #if defined _LIBC && defined USE_IN_LIBIO
691 n = __asprintf (&buf, _("\
692 %s: option `%c%s' doesn't allow an argument\n"),
693 argv[0], argv[optind - 1][0],
694 pfound->name);
695 #else
696 fprintf (stderr, _("\
697 %s: option `%c%s' doesn't allow an argument\n"),
698 argv[0], argv[optind - 1][0], pfound->name);
699 #endif
700 }
701
702 #if defined _LIBC && defined USE_IN_LIBIO
703 if (n >= 0)
704 {
705 if (_IO_fwide (stderr, 0) > 0)
706 __fwprintf (stderr, L"%s", buf);
707 else
708 fputs (buf, stderr);
709
710 free (buf);
711 }
712 #endif
713 }
714
715 nextchar += strlen (nextchar);
716
717 optopt = pfound->val;
718 return '?';
719 }
720 }
721 else if (pfound->has_arg == 1)
722 {
723 if (optind < argc)
724 optarg = argv[optind++];
725 else
726 {
727 if (print_errors)
728 {
729 #if defined _LIBC && defined USE_IN_LIBIO
730 char *buf;
731
732 if (__asprintf (&buf, _("\
733 %s: option `%s' requires an argument\n"),
734 argv[0], argv[optind - 1]) >= 0)
735 {
736 if (_IO_fwide (stderr, 0) > 0)
737 __fwprintf (stderr, L"%s", buf);
738 else
739 fputs (buf, stderr);
740
741 free (buf);
742 }
743 #else
744 fprintf (stderr,
745 _("%s: option `%s' requires an argument\n"),
746 argv[0], argv[optind - 1]);
747 #endif
748 }
749 nextchar += strlen (nextchar);
750 optopt = pfound->val;
751 return optstring[0] == ':' ? ':' : '?';
752 }
753 }
754 nextchar += strlen (nextchar);
755 if (longind != NULL)
756 *longind = option_index;
757 if (pfound->flag)
758 {
759 *(pfound->flag) = pfound->val;
760 return 0;
761 }
762 return pfound->val;
763 }
764
765 /* Can't find it as a long option. If this is not getopt_long_only,
766 or the option starts with '--' or is not a valid short
767 option, then it's an error.
768 Otherwise interpret it as a short option. */
769 if (!long_only || argv[optind][1] == '-'
770 || strchr (optstring, *nextchar) == NULL)
771 {
772 if (print_errors)
773 {
774 #if defined _LIBC && defined USE_IN_LIBIO
775 char *buf;
776 int n;
777 #endif
778
779 if (argv[optind][1] == '-')
780 {
781 /* --option */
782 #if defined _LIBC && defined USE_IN_LIBIO
783 n = __asprintf (&buf, _("%s: unrecognized option `--%s'\n"),
784 argv[0], nextchar);
785 #else
786 fprintf (stderr, _("%s: unrecognized option `--%s'\n"),
787 argv[0], nextchar);
788 #endif
789 }
790 else
791 {
792 /* +option or -option */
793 #if defined _LIBC && defined USE_IN_LIBIO
794 n = __asprintf (&buf, _("%s: unrecognized option `%c%s'\n"),
795 argv[0], argv[optind][0], nextchar);
796 #else
797 fprintf (stderr, _("%s: unrecognized option `%c%s'\n"),
798 argv[0], argv[optind][0], nextchar);
799 #endif
800 }
801
802 #if defined _LIBC && defined USE_IN_LIBIO
803 if (n >= 0)
804 {
805 if (_IO_fwide (stderr, 0) > 0)
806 __fwprintf (stderr, L"%s", buf);
807 else
808 fputs (buf, stderr);
809
810 free (buf);
811 }
812 #endif
813 }
814 nextchar = (char *) "";
815 optind++;
816 optopt = 0;
817 return '?';
818 }
819 }
820
821 /* Look at and handle the next short option-character. */
822
823 {
824 char c = *nextchar++;
825 char *temp = strchr (optstring, c);
826
827 /* Increment `optind' when we start to process its last character. */
828 if (*nextchar == '\0')
829 ++optind;
830
831 if (temp == NULL || c == ':')
832 {
833 if (print_errors)
834 {
835 #if defined _LIBC && defined USE_IN_LIBIO
836 char *buf;
837 int n;
838 #endif
839
840 if (posixly_correct)
841 {
842 /* 1003.2 specifies the format of this message. */
843 #if defined _LIBC && defined USE_IN_LIBIO
844 n = __asprintf (&buf, _("%s: illegal option -- %c\n"),
845 argv[0], c);
846 #else
847 fprintf (stderr, _("%s: illegal option -- %c\n"), argv[0], c);
848 #endif
849 }
850 else
851 {
852 #if defined _LIBC && defined USE_IN_LIBIO
853 n = __asprintf (&buf, _("%s: invalid option -- %c\n"),
854 argv[0], c);
855 #else
856 fprintf (stderr, _("%s: invalid option -- %c\n"), argv[0], c);
857 #endif
858 }
859
860 #if defined _LIBC && defined USE_IN_LIBIO
861 if (n >= 0)
862 {
863 if (_IO_fwide (stderr, 0) > 0)
864 __fwprintf (stderr, L"%s", buf);
865 else
866 fputs (buf, stderr);
867
868 free (buf);
869 }
870 #endif
871 }
872 optopt = c;
873 return '?';
874 }
875 /* Convenience. Treat POSIX -W foo same as long option --foo */
876 if (temp[0] == 'W' && temp[1] == ';')
877 {
878 char *nameend;
879 const struct option *p;
880 const struct option *pfound = NULL;
881 int exact = 0;
882 int ambig = 0;
883 int indfound = 0;
884 int option_index;
885
886 /* This is an option that requires an argument. */
887 if (*nextchar != '\0')
888 {
889 optarg = nextchar;
890 /* If we end this ARGV-element by taking the rest as an arg,
891 we must advance to the next element now. */
892 optind++;
893 }
894 else if (optind == argc)
895 {
896 if (print_errors)
897 {
898 /* 1003.2 specifies the format of this message. */
899 #if defined _LIBC && defined USE_IN_LIBIO
900 char *buf;
901
902 if (__asprintf (&buf,
903 _("%s: option requires an argument -- %c\n"),
904 argv[0], c) >= 0)
905 {
906 if (_IO_fwide (stderr, 0) > 0)
907 __fwprintf (stderr, L"%s", buf);
908 else
909 fputs (buf, stderr);
910
911 free (buf);
912 }
913 #else
914 fprintf (stderr, _("%s: option requires an argument -- %c\n"),
915 argv[0], c);
916 #endif
917 }
918 optopt = c;
919 if (optstring[0] == ':')
920 c = ':';
921 else
922 c = '?';
923 return c;
924 }
925 else
926 /* We already incremented `optind' once;
927 increment it again when taking next ARGV-elt as argument. */
928 optarg = argv[optind++];
929
930 /* optarg is now the argument, see if it's in the
931 table of longopts. */
932
933 for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++)
934 /* Do nothing. */ ;
935
936 /* Test all long options for either exact match
937 or abbreviated matches. */
938 for (p = longopts, option_index = 0; p->name; p++, option_index++)
939 if (!strncmp (p->name, nextchar, nameend - nextchar))
940 {
941 if ((unsigned int) (nameend - nextchar) == strlen (p->name))
942 {
943 /* Exact match found. */
944 pfound = p;
945 indfound = option_index;
946 exact = 1;
947 break;
948 }
949 else if (pfound == NULL)
950 {
951 /* First nonexact match found. */
952 pfound = p;
953 indfound = option_index;
954 }
955 else
956 /* Second or later nonexact match found. */
957 ambig = 1;
958 }
959 if (ambig && !exact)
960 {
961 if (print_errors)
962 {
963 #if defined _LIBC && defined USE_IN_LIBIO
964 char *buf;
965
966 if (__asprintf (&buf, _("%s: option `-W %s' is ambiguous\n"),
967 argv[0], argv[optind]) >= 0)
968 {
969 if (_IO_fwide (stderr, 0) > 0)
970 __fwprintf (stderr, L"%s", buf);
971 else
972 fputs (buf, stderr);
973
974 free (buf);
975 }
976 #else
977 fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"),
978 argv[0], argv[optind]);
979 #endif
980 }
981 nextchar += strlen (nextchar);
982 optind++;
983 return '?';
984 }
985 if (pfound != NULL)
986 {
987 option_index = indfound;
988 if (*nameend)
989 {
990 /* Don't test has_arg with >, because some C compilers don't
991 allow it to be used on enums. */
992 if (pfound->has_arg)
993 optarg = nameend + 1;
994 else
995 {
996 if (print_errors)
997 {
998 #if defined _LIBC && defined USE_IN_LIBIO
999 char *buf;
1000
1001 if (__asprintf (&buf, _("\
1002 %s: option `-W %s' doesn't allow an argument\n"),
1003 argv[0], pfound->name) >= 0)
1004 {
1005 if (_IO_fwide (stderr, 0) > 0)
1006 __fwprintf (stderr, L"%s", buf);
1007 else
1008 fputs (buf, stderr);
1009
1010 free (buf);
1011 }
1012 #else
1013 fprintf (stderr, _("\
1014 %s: option `-W %s' doesn't allow an argument\n"),
1015 argv[0], pfound->name);
1016 #endif
1017 }
1018
1019 nextchar += strlen (nextchar);
1020 return '?';
1021 }
1022 }
1023 else if (pfound->has_arg == 1)
1024 {
1025 if (optind < argc)
1026 optarg = argv[optind++];
1027 else
1028 {
1029 if (print_errors)
1030 {
1031 #if defined _LIBC && defined USE_IN_LIBIO
1032 char *buf;
1033
1034 if (__asprintf (&buf, _("\
1035 %s: option `%s' requires an argument\n"),
1036 argv[0], argv[optind - 1]) >= 0)
1037 {
1038 if (_IO_fwide (stderr, 0) > 0)
1039 __fwprintf (stderr, L"%s", buf);
1040 else
1041 fputs (buf, stderr);
1042
1043 free (buf);
1044 }
1045 #else
1046 fprintf (stderr,
1047 _("%s: option `%s' requires an argument\n"),
1048 argv[0], argv[optind - 1]);
1049 #endif
1050 }
1051 nextchar += strlen (nextchar);
1052 return optstring[0] == ':' ? ':' : '?';
1053 }
1054 }
1055 nextchar += strlen (nextchar);
1056 if (longind != NULL)
1057 *longind = option_index;
1058 if (pfound->flag)
1059 {
1060 *(pfound->flag) = pfound->val;
1061 return 0;
1062 }
1063 return pfound->val;
1064 }
1065 nextchar = NULL;
1066 return 'W'; /* Let the application handle it. */
1067 }
1068 if (temp[1] == ':')
1069 {
1070 if (temp[2] == ':')
1071 {
1072 /* This is an option that accepts an argument optionally. */
1073 if (*nextchar != '\0')
1074 {
1075 optarg = nextchar;
1076 optind++;
1077 }
1078 else
1079 optarg = NULL;
1080 nextchar = NULL;
1081 }
1082 else
1083 {
1084 /* This is an option that requires an argument. */
1085 if (*nextchar != '\0')
1086 {
1087 optarg = nextchar;
1088 /* If we end this ARGV-element by taking the rest as an arg,
1089 we must advance to the next element now. */
1090 optind++;
1091 }
1092 else if (optind == argc)
1093 {
1094 if (print_errors)
1095 {
1096 /* 1003.2 specifies the format of this message. */
1097 #if defined _LIBC && defined USE_IN_LIBIO
1098 char *buf;
1099
1100 if (__asprintf (&buf, _("\
1101 %s: option requires an argument -- %c\n"),
1102 argv[0], c) >= 0)
1103 {
1104 if (_IO_fwide (stderr, 0) > 0)
1105 __fwprintf (stderr, L"%s", buf);
1106 else
1107 fputs (buf, stderr);
1108
1109 free (buf);
1110 }
1111 #else
1112 fprintf (stderr,
1113 _("%s: option requires an argument -- %c\n"),
1114 argv[0], c);
1115 #endif
1116 }
1117 optopt = c;
1118 if (optstring[0] == ':')
1119 c = ':';
1120 else
1121 c = '?';
1122 }
1123 else
1124 /* We already incremented `optind' once;
1125 increment it again when taking next ARGV-elt as argument. */
1126 optarg = argv[optind++];
1127 nextchar = NULL;
1128 }
1129 }
1130 return c;
1131 }
1132 }
1133
1134 int
getopt(int argc,char * const * argv,const char * optstring)1135 getopt (int argc, char *const *argv, const char *optstring)
1136 {
1137 return _getopt_internal (argc, argv, optstring,
1138 (const struct option *) 0,
1139 (int *) 0,
1140 0);
1141 }
1142
1143 #endif /* Not ELIDE_CODE. */
1144
1145 #ifdef TEST
1146
1147 /* Compile with -DTEST to make an executable for use in testing
1148 the above definition of `getopt'. */
1149
1150 int
main(int argc,char ** argv)1151 main (int argc, char **argv)
1152 {
1153 int digit_optind = 0;
1154
1155 while (1)
1156 {
1157 int this_option_optind = optind ? optind : 1;
1158
1159 int c = getopt (argc, argv, "abc:d:0123456789");
1160 if (c == -1)
1161 break;
1162
1163 switch (c)
1164 {
1165 case '0':
1166 case '1':
1167 case '2':
1168 case '3':
1169 case '4':
1170 case '5':
1171 case '6':
1172 case '7':
1173 case '8':
1174 case '9':
1175 if (digit_optind != 0 && digit_optind != this_option_optind)
1176 printf ("digits occur in two different argv-elements.\n");
1177 digit_optind = this_option_optind;
1178 printf ("option %c\n", c);
1179 break;
1180
1181 case 'a':
1182 printf ("option a\n");
1183 break;
1184
1185 case 'b':
1186 printf ("option b\n");
1187 break;
1188
1189 case 'c':
1190 printf ("option c with value `%s'\n", optarg);
1191 break;
1192
1193 case '?':
1194 break;
1195
1196 default:
1197 printf ("?? getopt returned character code 0%o ??\n", c);
1198 }
1199 }
1200
1201 if (optind < argc)
1202 {
1203 printf ("non-option ARGV-elements: ");
1204 while (optind < argc)
1205 printf ("%s ", argv[optind++]);
1206 printf ("\n");
1207 }
1208
1209 exit (0);
1210 }
1211
1212 #endif /* TEST */
1213