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
6 Free Software Foundation, Inc.
7 This file is part of the GNU C Library.
8
9 The GNU C Library is free software; you can redistribute it and/or
10 modify it under the terms of the GNU Lesser General Public
11 License as published by the Free Software Foundation; either
12 version 2.1 of the License, or (at your option) any later version.
13
14 The GNU C Library 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 GNU
17 Lesser General Public License for more details.
18
19 You should have received a copy of the GNU Lesser General Public
20 License along with the GNU C Library; if not, write to the Free
21 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
22 02111-1307 USA. */
23 /* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>.
24 Ditto for AIX 3.2 and <stdlib.h>. */
25 #ifndef _NO_PROTO
26 # define _NO_PROTO
27 #endif
28
29 #ifdef HAVE_CONFIG_H
30 # include <config.h>
31 #endif
32
33 #if !defined __STDC__ || !__STDC__
34 /* This is a separate conditional since some stdc systems
35 reject `defined (const)'. */
36 # ifndef const
37 # define const
38 # endif
39 #endif
40
41 #include <stdio.h>
42
43 /* Comment out all this code if we are using the GNU C Library, and are not
44 actually compiling the library itself. This code is part of the GNU C
45 Library, but also included in many other GNU distributions. Compiling
46 and linking in this code is a waste when using the GNU C library
47 (especially if it is a shared library). Rather than having every GNU
48 program understand `configure --with-gnu-libc' and omit the object files,
49 it is simpler to just do this in the source for each such file. */
50
51 #define GETOPT_INTERFACE_VERSION 2
52 #if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2
53 # include <gnu-versions.h>
54 # if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
55 # define ELIDE_CODE
56 # endif
57 #endif
58
59 #ifndef ELIDE_CODE
60
61
62 /* This needs to come after some library #include
63 to get __GNU_LIBRARY__ defined. */
64 #ifdef __GNU_LIBRARY__
65 /* Don't include stdlib.h for non-GNU C libraries because some of them
66 contain conflicting prototypes for getopt. */
67 # include <stdlib.h>
68 # include <unistd.h>
69 #endif /* GNU C library. */
70
71 #ifdef VMS
72 # include <unixlib.h>
73 # if HAVE_STRING_H - 0
74 # include <string.h>
75 # endif
76 #endif
77
78 #ifndef _
79 /* This is for other GNU distributions with internationalized messages. */
80 # if (HAVE_LIBINTL_H && ENABLE_NLS) || defined _LIBC
81 # include <libintl.h>
82 # ifndef _
83 # define _(msgid) gettext (msgid)
84 # endif
85 # else
86 # define _(msgid) (msgid)
87 # endif
88 #endif
89
90 /* This version of `getopt' appears to the caller like standard Unix `getopt'
91 but it behaves differently for the user, since it allows the user
92 to intersperse the options with the other arguments.
93
94 As `getopt' works, it permutes the elements of ARGV so that,
95 when it is done, all the options precede everything else. Thus
96 all application programs are extended to handle flexible argument order.
97
98 Setting the environment variable POSIXLY_CORRECT disables permutation.
99 Then the behavior is completely standard.
100
101 GNU application programs can use a third alternative mode in which
102 they can distinguish the relative order of options and other arguments. */
103
104 #include "getopt.h"
105
106 /* For communication from `getopt' to the caller.
107 When `getopt' finds an option that takes an argument,
108 the argument value is returned here.
109 Also, when `ordering' is RETURN_IN_ORDER,
110 each non-option ARGV-element is returned here. */
111
112 char *optarg;
113
114 /* Index in ARGV of the next element to be scanned.
115 This is used for communication to and from the caller
116 and for communication between successive calls to `getopt'.
117
118 On entry to `getopt', zero means this is the first call; initialize.
119
120 When `getopt' returns -1, this is the index of the first of the
121 non-option elements that the caller should itself scan.
122
123 Otherwise, `optind' communicates from one call to the next
124 how much of ARGV has been scanned so far. */
125
126 /* 1003.2 says this must be 1 before any call. */
127 int optind = 1;
128
129 /* Formerly, initialization of getopt depended on optind==0, which
130 causes problems with re-calling getopt as programs generally don't
131 know that. */
132
133 int __getopt_initialized;
134
135 /* The next char to be scanned in the option-element
136 in which the last option character we returned was found.
137 This allows us to pick up the scan where we left off.
138
139 If this is zero, or a null string, it means resume the scan
140 by advancing to the next ARGV-element. */
141
142 static char *nextchar;
143
144 /* Callers store zero here to inhibit the error message
145 for unrecognized options. */
146
147 int opterr = 1;
148
149 /* Set to an option character which was unrecognized.
150 This must be initialized on some systems to avoid linking in the
151 system's own getopt implementation. */
152
153 int optopt = '?';
154
155 /* Describe how to deal with options that follow non-option ARGV-elements.
156
157 If the caller did not specify anything,
158 the default is REQUIRE_ORDER if the environment variable
159 POSIXLY_CORRECT is defined, PERMUTE otherwise.
160
161 REQUIRE_ORDER means don't recognize them as options;
162 stop option processing when the first non-option is seen.
163 This is what Unix does.
164 This mode of operation is selected by either setting the environment
165 variable POSIXLY_CORRECT, or using `+' as the first character
166 of the list of option characters.
167
168 PERMUTE is the default. We permute the contents of ARGV as we scan,
169 so that eventually all the non-options are at the end. This allows options
170 to be given in any order, even with programs that were not written to
171 expect this.
172
173 RETURN_IN_ORDER is an option available to programs that were written
174 to expect options and other ARGV-elements in any order and that care about
175 the ordering of the two. We describe each non-option ARGV-element
176 as if it were the argument of an option with character code 1.
177 Using `-' as the first character of the list of option characters
178 selects this mode of operation.
179
180 The special argument `--' forces an end of option-scanning regardless
181 of the value of `ordering'. In the case of RETURN_IN_ORDER, only
182 `--' can cause `getopt' to return -1 with `optind' != ARGC. */
183
184 static enum
185 {
186 REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
187 } ordering;
188
189 /* Value of POSIXLY_CORRECT environment variable. */
190 static char *posixly_correct;
191
192 #ifdef __GNU_LIBRARY__
193 /* We want to avoid inclusion of string.h with non-GNU libraries
194 because there are many ways it can cause trouble.
195 On some systems, it contains special magic macros that don't work
196 in GCC. */
197 # include <string.h>
198 # define my_index strchr
199 #else
200
201 # if 1 //HAVE_STRING_H
202 # include <string.h>
203 # else
204 # include <strings.h>
205 # endif
206
207 /* Avoid depending on library functions or files
208 whose names are inconsistent. */
209
210 #ifndef getenv
211 #ifdef _MSC_VER
212 // DDK will complain if you don't use the stdlib defined getenv
213 #include <stdlib.h>
214 #else
215 extern char *getenv ();
216 #endif
217 #endif
218
219 static char *
my_index(str,chr)220 my_index (str, chr)
221 const char *str;
222 int chr;
223 {
224 while (*str)
225 {
226 if (*str == chr)
227 return (char *) str;
228 str++;
229 }
230 return 0;
231 }
232
233 /* If using GCC, we can safely declare strlen this way.
234 If not using GCC, it is ok not to declare it. */
235 #ifdef __GNUC__
236 /* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h.
237 That was relevant to code that was here before. */
238 # if (!defined __STDC__ || !__STDC__) && !defined strlen
239 /* gcc with -traditional declares the built-in strlen to return int,
240 and has done so at least since version 2.4.5. -- rms. */
241 extern int strlen (const char *);
242 # endif /* not __STDC__ */
243 #endif /* __GNUC__ */
244
245 #endif /* not __GNU_LIBRARY__ */
246
247 /* Handle permutation of arguments. */
248
249 /* Describe the part of ARGV that contains non-options that have
250 been skipped. `first_nonopt' is the index in ARGV of the first of them;
251 `last_nonopt' is the index after the last of them. */
252
253 static int first_nonopt;
254 static int last_nonopt;
255
256 #ifdef _LIBC
257 /* Stored original parameters.
258 XXX This is no good solution. We should rather copy the args so
259 that we can compare them later. But we must not use malloc(3). */
260 extern int __libc_argc;
261 extern char **__libc_argv;
262
263 /* Bash 2.0 gives us an environment variable containing flags
264 indicating ARGV elements that should not be considered arguments. */
265
266 # ifdef USE_NONOPTION_FLAGS
267 /* Defined in getopt_init.c */
268 extern char *__getopt_nonoption_flags;
269
270 static int nonoption_flags_max_len;
271 static int nonoption_flags_len;
272 # endif
273
274 # ifdef USE_NONOPTION_FLAGS
275 # define SWAP_FLAGS(ch1, ch2) \
276 if (nonoption_flags_len > 0) \
277 { \
278 char __tmp = __getopt_nonoption_flags[ch1]; \
279 __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \
280 __getopt_nonoption_flags[ch2] = __tmp; \
281 }
282 # else
283 # define SWAP_FLAGS(ch1, ch2)
284 # endif
285 #else /* !_LIBC */
286 # define SWAP_FLAGS(ch1, ch2)
287 #endif /* _LIBC */
288
289 /* Exchange two adjacent subsequences of ARGV.
290 One subsequence is elements [first_nonopt,last_nonopt)
291 which contains all the non-options that have been skipped so far.
292 The other is elements [last_nonopt,optind), which contains all
293 the options processed since those non-options were skipped.
294
295 `first_nonopt' and `last_nonopt' are relocated so that they describe
296 the new indices of the non-options in ARGV after they are moved. */
297
298 #if defined __STDC__ && __STDC__
299 static void exchange (char **);
300 #endif
301
302 static void
exchange(argv)303 exchange (argv)
304 char **argv;
305 {
306 int bottom = first_nonopt;
307 int middle = last_nonopt;
308 int top = optind;
309 char *tem;
310
311 /* Exchange the shorter segment with the far end of the longer segment.
312 That puts the shorter segment into the right place.
313 It leaves the longer segment in the right place overall,
314 but it consists of two parts that need to be swapped next. */
315
316 #if defined _LIBC && defined USE_NONOPTION_FLAGS
317 /* First make sure the handling of the `__getopt_nonoption_flags'
318 string can work normally. Our top argument must be in the range
319 of the string. */
320 if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len)
321 {
322 /* We must extend the array. The user plays games with us and
323 presents new arguments. */
324 char *new_str = malloc (top + 1);
325 if (new_str == NULL)
326 nonoption_flags_len = nonoption_flags_max_len = 0;
327 else
328 {
329 memset (__mempcpy (new_str, __getopt_nonoption_flags,
330 nonoption_flags_max_len),
331 '\0', top + 1 - nonoption_flags_max_len);
332 nonoption_flags_max_len = top + 1;
333 __getopt_nonoption_flags = new_str;
334 }
335 }
336 #endif
337
338 while (top > middle && middle > bottom)
339 {
340 if (top - middle > middle - bottom)
341 {
342 /* Bottom segment is the short one. */
343 int len = middle - bottom;
344 register int i;
345
346 /* Swap it with the top part of the top segment. */
347 for (i = 0; i < len; i++)
348 {
349 tem = argv[bottom + i];
350 argv[bottom + i] = argv[top - (middle - bottom) + i];
351 argv[top - (middle - bottom) + i] = tem;
352 SWAP_FLAGS (bottom + i, top - (middle - bottom) + i);
353 }
354 /* Exclude the moved bottom segment from further swapping. */
355 top -= len;
356 }
357 else
358 {
359 /* Top segment is the short one. */
360 int len = top - middle;
361 register int i;
362
363 /* Swap it with the bottom part of the bottom segment. */
364 for (i = 0; i < len; i++)
365 {
366 tem = argv[bottom + i];
367 argv[bottom + i] = argv[middle + i];
368 argv[middle + i] = tem;
369 SWAP_FLAGS (bottom + i, middle + i);
370 }
371 /* Exclude the moved top segment from further swapping. */
372 bottom += len;
373 }
374 }
375
376 /* Update records for the slots the non-options now occupy. */
377
378 first_nonopt += (optind - last_nonopt);
379 last_nonopt = optind;
380 }
381
382 /* Initialize the internal data when the first call is made. */
383
384 #if defined __STDC__ && __STDC__
385 static const char *_getopt_initialize (int, char *const *, const char *);
386 #endif
387 static const char *
_getopt_initialize(argc,argv,optstring)388 _getopt_initialize (argc, argv, optstring)
389 int argc;
390 char *const *argv;
391 const char *optstring;
392 {
393 /* Start processing options with ARGV-element 1 (since ARGV-element 0
394 is the program name); the sequence of previously skipped
395 non-option ARGV-elements is empty. */
396
397 first_nonopt = last_nonopt = optind;
398
399 nextchar = NULL;
400
401 posixly_correct = getenv ("POSIXLY_CORRECT");
402
403 /* Determine how to handle the ordering of options and nonoptions. */
404
405 if (optstring[0] == '-')
406 {
407 ordering = RETURN_IN_ORDER;
408 ++optstring;
409 }
410 else if (optstring[0] == '+')
411 {
412 ordering = REQUIRE_ORDER;
413 ++optstring;
414 }
415 else if (posixly_correct != NULL)
416 ordering = REQUIRE_ORDER;
417 else
418 ordering = PERMUTE;
419
420 #if defined _LIBC && defined USE_NONOPTION_FLAGS
421 if (posixly_correct == NULL
422 && argc == __libc_argc && argv == __libc_argv)
423 {
424 if (nonoption_flags_max_len == 0)
425 {
426 if (__getopt_nonoption_flags == NULL
427 || __getopt_nonoption_flags[0] == '\0')
428 nonoption_flags_max_len = -1;
429 else
430 {
431 const char *orig_str = __getopt_nonoption_flags;
432 int len = nonoption_flags_max_len = strlen (orig_str);
433 if (nonoption_flags_max_len < argc)
434 nonoption_flags_max_len = argc;
435 __getopt_nonoption_flags =
436 (char *) malloc (nonoption_flags_max_len);
437 if (__getopt_nonoption_flags == NULL)
438 nonoption_flags_max_len = -1;
439 else
440 memset (__mempcpy (__getopt_nonoption_flags, orig_str, len),
441 '\0', nonoption_flags_max_len - len);
442 }
443 }
444 nonoption_flags_len = nonoption_flags_max_len;
445 }
446 else
447 nonoption_flags_len = 0;
448 #endif
449
450 return optstring;
451 }
452
453 int
getopt_long(int argc,char * const * argv,const char * options,const struct option * long_options,int * opt_index)454 getopt_long (
455 int argc,
456 char *const *argv,
457 const char *options,
458 const struct option *long_options,
459 int *opt_index)
460 {
461 return _getopt_internal (argc, argv, options, long_options, opt_index, 0);
462 }
463
464 /* Like getopt_long, but '-' as well as '--' can indicate a long option.
465 If an option that starts with '-' (not '--') doesn't match a long option,
466 but does match a short option, it is parsed as a short option
467 instead. */
468
469 int
getopt_long_only(int argc,char * const * argv,const char * options,const struct option * long_options,int * opt_index)470 getopt_long_only (
471 int argc,
472 char *const *argv,
473 const char *options,
474 const struct option *long_options,
475 int *opt_index)
476 {
477 return _getopt_internal (argc, argv, options, long_options, opt_index, 1);
478 }
479
480 /* Scan elements of ARGV (whose length is ARGC) for option characters
481 given in OPTSTRING.
482
483 If an element of ARGV starts with '-', and is not exactly "-" or "--",
484 then it is an option element. The characters of this element
485 (aside from the initial '-') are option characters. If `getopt'
486 is called repeatedly, it returns successively each of the option characters
487 from each of the option elements.
488
489 If `getopt' finds another option character, it returns that character,
490 updating `optind' and `nextchar' so that the next call to `getopt' can
491 resume the scan with the following option character or ARGV-element.
492
493 If there are no more option characters, `getopt' returns -1.
494 Then `optind' is the index in ARGV of the first ARGV-element
495 that is not an option. (The ARGV-elements have been permuted
496 so that those that are not options now come last.)
497
498 OPTSTRING is a string containing the legitimate option characters.
499 If an option character is seen that is not listed in OPTSTRING,
500 return '?' after printing an error message. If you set `opterr' to
501 zero, the error message is suppressed but we still return '?'.
502
503 If a char in OPTSTRING is followed by a colon, that means it wants an arg,
504 so the following text in the same ARGV-element, or the text of the following
505 ARGV-element, is returned in `optarg'. Two colons mean an option that
506 wants an optional arg; if there is text in the current ARGV-element,
507 it is returned in `optarg', otherwise `optarg' is set to zero.
508
509 If OPTSTRING starts with `-' or `+', it requests different methods of
510 handling the non-option ARGV-elements.
511 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
512
513 Long-named options begin with `--' instead of `-'.
514 Their names may be abbreviated as long as the abbreviation is unique
515 or is an exact match for some defined option. If they have an
516 argument, it follows the option name in the same ARGV-element, separated
517 from the option name by a `=', or else the in next ARGV-element.
518 When `getopt' finds a long-named option, it returns 0 if that option's
519 `flag' field is nonzero, the value of the option's `val' field
520 if the `flag' field is zero.
521
522 The elements of ARGV aren't really const, because we permute them.
523 But we pretend they're const in the prototype to be compatible
524 with other systems.
525
526 LONGOPTS is a vector of `struct option' terminated by an
527 element containing a name which is zero.
528
529 LONGIND returns the index in LONGOPT of the long-named option found.
530 It is only valid when a long-named option has been found by the most
531 recent call.
532
533 If LONG_ONLY is nonzero, '-' as well as '--' can introduce
534 long-named options. */
535
536 int
_getopt_internal(argc,argv,optstring,longopts,longind,long_only)537 _getopt_internal (argc, argv, optstring, longopts, longind, long_only)
538 int argc;
539 char *const *argv;
540 const char *optstring;
541 const struct option *longopts;
542 int *longind;
543 int long_only;
544 {
545 int print_errors = opterr;
546 if (optstring[0] == ':')
547 print_errors = 0;
548
549 if (argc < 1)
550 return -1;
551
552 optarg = NULL;
553
554 if (optind == 0 || !__getopt_initialized)
555 {
556 if (optind == 0)
557 optind = 1; /* Don't scan ARGV[0], the program name. */
558 optstring = _getopt_initialize (argc, argv, optstring);
559 __getopt_initialized = 1;
560 }
561
562 /* Test whether ARGV[optind] points to a non-option argument.
563 Either it does not have option syntax, or there is an environment flag
564 from the shell indicating it is not an option. The later information
565 is only used when the used in the GNU libc. */
566 #if defined _LIBC && defined USE_NONOPTION_FLAGS
567 # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \
568 || (optind < nonoption_flags_len \
569 && __getopt_nonoption_flags[optind] == '1'))
570 #else
571 # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0')
572 #endif
573
574 if (nextchar == NULL || *nextchar == '\0')
575 {
576 /* Advance to the next ARGV-element. */
577
578 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been
579 moved back by the user (who may also have changed the arguments). */
580 if (last_nonopt > optind)
581 last_nonopt = optind;
582 if (first_nonopt > optind)
583 first_nonopt = optind;
584
585 if (ordering == PERMUTE)
586 {
587 /* If we have just processed some options following some non-options,
588 exchange them so that the options come first. */
589
590 if (first_nonopt != last_nonopt && last_nonopt != optind)
591 exchange ((char **) argv);
592 else if (last_nonopt != optind)
593 first_nonopt = optind;
594
595 /* Skip any additional non-options
596 and extend the range of non-options previously skipped. */
597
598 while (optind < argc && NONOPTION_P)
599 optind++;
600 last_nonopt = optind;
601 }
602
603 /* The special ARGV-element `--' means premature end of options.
604 Skip it like a null option,
605 then exchange with previous non-options as if it were an option,
606 then skip everything else like a non-option. */
607
608 if (optind != argc && !strcmp (argv[optind], "--"))
609 {
610 optind++;
611
612 if (first_nonopt != last_nonopt && last_nonopt != optind)
613 exchange ((char **) argv);
614 else if (first_nonopt == last_nonopt)
615 first_nonopt = optind;
616 last_nonopt = argc;
617
618 optind = argc;
619 }
620
621 /* If we have done all the ARGV-elements, stop the scan
622 and back over any non-options that we skipped and permuted. */
623
624 if (optind == argc)
625 {
626 /* Set the next-arg-index to point at the non-options
627 that we previously skipped, so the caller will digest them. */
628 if (first_nonopt != last_nonopt)
629 optind = first_nonopt;
630 return -1;
631 }
632
633 /* If we have come to a non-option and did not permute it,
634 either stop the scan or describe it to the caller and pass it by. */
635
636 if (NONOPTION_P)
637 {
638 if (ordering == REQUIRE_ORDER)
639 return -1;
640 optarg = argv[optind++];
641 return 1;
642 }
643
644 /* We have found another option-ARGV-element.
645 Skip the initial punctuation. */
646
647 nextchar = (argv[optind] + 1
648 + (longopts != NULL && argv[optind][1] == '-'));
649 }
650
651 /* Decode the current option-ARGV-element. */
652
653 /* Check whether the ARGV-element is a long option.
654
655 If long_only and the ARGV-element has the form "-f", where f is
656 a valid short option, don't consider it an abbreviated form of
657 a long option that starts with f. Otherwise there would be no
658 way to give the -f short option.
659
660 On the other hand, if there's a long option "fubar" and
661 the ARGV-element is "-fu", do consider that an abbreviation of
662 the long option, just like "--fu", and not "-f" with arg "u".
663
664 This distinction seems to be the most useful approach. */
665
666 if (longopts != NULL
667 && (argv[optind][1] == '-'
668 || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1])))))
669 {
670 char *nameend;
671 const struct option *p;
672 const struct option *pfound = NULL;
673 int exact = 0;
674 int ambig = 0;
675 int indfound = -1;
676 int option_index;
677
678 for (nameend = nextchar; *nameend && *nameend != '='; nameend++)
679 /* Do nothing. */ ;
680
681 /* Test all long options for either exact match
682 or abbreviated matches. */
683 for (p = longopts, option_index = 0; p->name; p++, option_index++)
684 if (!strncmp (p->name, nextchar, nameend - nextchar))
685 {
686 if ((unsigned int) (nameend - nextchar)
687 == (unsigned int) strlen (p->name))
688 {
689 /* Exact match found. */
690 pfound = p;
691 indfound = option_index;
692 exact = 1;
693 break;
694 }
695 else if (pfound == NULL)
696 {
697 /* First nonexact match found. */
698 pfound = p;
699 indfound = option_index;
700 }
701 else if (long_only
702 || pfound->has_arg != p->has_arg
703 || pfound->flag != p->flag
704 || pfound->val != p->val)
705 /* Second or later nonexact match found. */
706 ambig = 1;
707 }
708
709 if (ambig && !exact)
710 {
711 if (print_errors)
712 fprintf (stderr, _("%s: option `%s' is ambiguous\n"),
713 argv[0], argv[optind]);
714 nextchar += strlen (nextchar);
715 optind++;
716 optopt = 0;
717 return '?';
718 }
719
720 if (pfound != NULL)
721 {
722 option_index = indfound;
723 optind++;
724 if (*nameend)
725 {
726 /* Don't test has_arg with >, because some C compilers don't
727 allow it to be used on enums. */
728 if (pfound->has_arg)
729 optarg = nameend + 1;
730 else
731 {
732 if (print_errors)
733 {
734 if (argv[optind - 1][1] == '-')
735 /* --option */
736 fprintf (stderr,
737 _("%s: option `--%s' doesn't allow an argument\n"),
738 argv[0], pfound->name);
739 else
740 /* +option or -option */
741 fprintf (stderr,
742 _("%s: option `%c%s' doesn't allow an argument\n"),
743 argv[0], argv[optind - 1][0], pfound->name);
744 }
745
746 nextchar += strlen (nextchar);
747
748 optopt = pfound->val;
749 return '?';
750 }
751 }
752 else if (pfound->has_arg == 1)
753 {
754 if (optind < argc)
755 optarg = argv[optind++];
756 else
757 {
758 if (print_errors)
759 fprintf (stderr,
760 _("%s: option `%s' requires an argument\n"),
761 argv[0], argv[optind - 1]);
762 nextchar += strlen (nextchar);
763 optopt = pfound->val;
764 return optstring[0] == ':' ? ':' : '?';
765 }
766 }
767 nextchar += strlen (nextchar);
768 if (longind != NULL)
769 *longind = option_index;
770 if (pfound->flag)
771 {
772 *(pfound->flag) = pfound->val;
773 return 0;
774 }
775 return pfound->val;
776 }
777
778 /* Can't find it as a long option. If this is not getopt_long_only,
779 or the option starts with '--' or is not a valid short
780 option, then it's an error.
781 Otherwise interpret it as a short option. */
782 if (!long_only || argv[optind][1] == '-'
783 || my_index (optstring, *nextchar) == NULL)
784 {
785 if (print_errors)
786 {
787 if (argv[optind][1] == '-')
788 /* --option */
789 fprintf (stderr, _("%s: unrecognized option `--%s'\n"),
790 argv[0], nextchar);
791 else
792 /* +option or -option */
793 fprintf (stderr, _("%s: unrecognized option `%c%s'\n"),
794 argv[0], argv[optind][0], nextchar);
795 }
796 nextchar = (char *) "";
797 optind++;
798 optopt = 0;
799 return '?';
800 }
801 }
802
803 /* Look at and handle the next short option-character. */
804
805 {
806 char c = *nextchar++;
807 char *temp = my_index (optstring, c);
808
809 /* Increment `optind' when we start to process its last character. */
810 if (*nextchar == '\0')
811 ++optind;
812
813 if (temp == NULL || c == ':')
814 {
815 if (print_errors)
816 {
817 if (posixly_correct)
818 /* 1003.2 specifies the format of this message. */
819 fprintf (stderr, _("%s: illegal option -- %c\n"),
820 argv[0], c);
821 else
822 fprintf (stderr, _("%s: invalid option -- %c\n"),
823 argv[0], c);
824 }
825 optopt = c;
826 return '?';
827 }
828 /* Convenience. Treat POSIX -W foo same as long option --foo */
829 if (temp[0] == 'W' && temp[1] == ';')
830 {
831 char *nameend;
832 const struct option *p;
833 const struct option *pfound = NULL;
834 int exact = 0;
835 int ambig = 0;
836 int indfound = 0;
837 int option_index;
838
839 /* This is an option that requires an argument. */
840 if (*nextchar != '\0')
841 {
842 optarg = nextchar;
843 /* If we end this ARGV-element by taking the rest as an arg,
844 we must advance to the next element now. */
845 optind++;
846 }
847 else if (optind == argc)
848 {
849 if (print_errors)
850 {
851 /* 1003.2 specifies the format of this message. */
852 fprintf (stderr, _("%s: option requires an argument -- %c\n"),
853 argv[0], c);
854 }
855 optopt = c;
856 if (optstring[0] == ':')
857 c = ':';
858 else
859 c = '?';
860 return c;
861 }
862 else
863 /* We already incremented `optind' once;
864 increment it again when taking next ARGV-elt as argument. */
865 optarg = argv[optind++];
866
867 /* optarg is now the argument, see if it's in the
868 table of longopts. */
869
870 for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++)
871 /* Do nothing. */ ;
872
873 /* Test all long options for either exact match
874 or abbreviated matches. */
875 for (p = longopts, option_index = 0; p->name; p++, option_index++)
876 if (!strncmp (p->name, nextchar, nameend - nextchar))
877 {
878 if ((unsigned int) (nameend - nextchar) == strlen (p->name))
879 {
880 /* Exact match found. */
881 pfound = p;
882 indfound = option_index;
883 exact = 1;
884 break;
885 }
886 else if (pfound == NULL)
887 {
888 /* First nonexact match found. */
889 pfound = p;
890 indfound = option_index;
891 }
892 else
893 /* Second or later nonexact match found. */
894 ambig = 1;
895 }
896 if (ambig && !exact)
897 {
898 if (print_errors)
899 fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"),
900 argv[0], argv[optind]);
901 nextchar += strlen (nextchar);
902 optind++;
903 return '?';
904 }
905 if (pfound != NULL)
906 {
907 option_index = indfound;
908 if (*nameend)
909 {
910 /* Don't test has_arg with >, because some C compilers don't
911 allow it to be used on enums. */
912 if (pfound->has_arg)
913 optarg = nameend + 1;
914 else
915 {
916 if (print_errors)
917 fprintf (stderr, _("\
918 %s: option `-W %s' doesn't allow an argument\n"),
919 argv[0], pfound->name);
920
921 nextchar += strlen (nextchar);
922 return '?';
923 }
924 }
925 else if (pfound->has_arg == 1)
926 {
927 if (optind < argc)
928 optarg = argv[optind++];
929 else
930 {
931 if (print_errors)
932 fprintf (stderr,
933 _("%s: option `%s' requires an argument\n"),
934 argv[0], argv[optind - 1]);
935 nextchar += strlen (nextchar);
936 return optstring[0] == ':' ? ':' : '?';
937 }
938 }
939 nextchar += strlen (nextchar);
940 if (longind != NULL)
941 *longind = option_index;
942 if (pfound->flag)
943 {
944 *(pfound->flag) = pfound->val;
945 return 0;
946 }
947 return pfound->val;
948 }
949 nextchar = NULL;
950 return 'W'; /* Let the application handle it. */
951 }
952 if (temp[1] == ':')
953 {
954 if (temp[2] == ':')
955 {
956 /* This is an option that accepts an argument optionally. */
957 if (*nextchar != '\0')
958 {
959 optarg = nextchar;
960 optind++;
961 }
962 else
963 optarg = NULL;
964 nextchar = NULL;
965 }
966 else
967 {
968 /* This is an option that requires an argument. */
969 if (*nextchar != '\0')
970 {
971 optarg = nextchar;
972 /* If we end this ARGV-element by taking the rest as an arg,
973 we must advance to the next element now. */
974 optind++;
975 }
976 else if (optind == argc)
977 {
978 if (print_errors)
979 {
980 /* 1003.2 specifies the format of this message. */
981 fprintf (stderr,
982 _("%s: option requires an argument -- %c\n"),
983 argv[0], c);
984 }
985 optopt = c;
986 if (optstring[0] == ':')
987 c = ':';
988 else
989 c = '?';
990 }
991 else
992 /* We already incremented `optind' once;
993 increment it again when taking next ARGV-elt as argument. */
994 optarg = argv[optind++];
995 nextchar = NULL;
996 }
997 }
998 return c;
999 }
1000 }
1001
1002 int
getopt(argc,argv,optstring)1003 getopt (argc, argv, optstring)
1004 int argc;
1005 char *const *argv;
1006 const char *optstring;
1007 {
1008 return _getopt_internal (argc, argv, optstring,
1009 (const struct option *) 0,
1010 (int *) 0,
1011 0);
1012 }
1013
1014 #endif /* Not ELIDE_CODE. */
1015
1016 #ifdef TEST
1017
1018 /* Compile with -DTEST to make an executable for use in testing
1019 the above definition of `getopt'. */
1020
1021 int
main(argc,argv)1022 main (argc, argv)
1023 int argc;
1024 char **argv;
1025 {
1026 int c;
1027 int digit_optind = 0;
1028
1029 while (1)
1030 {
1031 int this_option_optind = optind ? optind : 1;
1032
1033 c = getopt (argc, argv, "abc:d:0123456789");
1034 if (c == -1)
1035 break;
1036
1037 switch (c)
1038 {
1039 case '0':
1040 case '1':
1041 case '2':
1042 case '3':
1043 case '4':
1044 case '5':
1045 case '6':
1046 case '7':
1047 case '8':
1048 case '9':
1049 if (digit_optind != 0 && digit_optind != this_option_optind)
1050 printf ("digits occur in two different argv-elements.\n");
1051 digit_optind = this_option_optind;
1052 printf ("option %c\n", c);
1053 break;
1054
1055 case 'a':
1056 printf ("option a\n");
1057 break;
1058
1059 case 'b':
1060 printf ("option b\n");
1061 break;
1062
1063 case 'c':
1064 printf ("option c with value `%s'\n", optarg);
1065 break;
1066
1067 case '?':
1068 break;
1069
1070 default:
1071 printf ("?? getopt returned character code 0%o ??\n", c);
1072 }
1073 }
1074
1075 if (optind < argc)
1076 {
1077 printf ("non-option ARGV-elements: ");
1078 while (optind < argc)
1079 printf ("%s ", argv[optind++]);
1080 printf ("\n");
1081 }
1082
1083 exit (0);
1084 }
1085
1086 #endif /* TEST */
1087