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author Robert McIntyre <rlm@mit.edu>
date Sat, 03 Mar 2012 10:31:27 -0600
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0:8ced16adf2e1 1:f9f4f1b99eed
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, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98
7 Free Software Foundation, Inc.
8
9 NOTE: This source is derived from an old version taken from the GNU C
10 Library (glibc).
11
12 This program is free software; you can redistribute it and/or modify it
13 under the terms of the GNU General Public License as published by the
14 Free Software Foundation; either version 2, or (at your option) any
15 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
23 along with this program; if not, write to the Free Software
24 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
25 USA. */
26
27 /* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>.
28 Ditto for AIX 3.2 and <stdlib.h>. */
29 #ifndef _NO_PROTO
30 # define _NO_PROTO
31 #endif
32
33 #ifdef HAVE_CONFIG_H
34 # include <config.h>
35 #endif
36
37 #if !defined __STDC__ || !__STDC__
38 /* This is a separate conditional since some stdc systems
39 reject `defined (const)'. */
40 # ifndef const
41 # define const
42 # endif
43 #endif
44
45 #include <stdio.h>
46
47 /* Comment out all this code if we are using the GNU C Library, and are not
48 actually compiling the library itself. This code is part of the GNU C
49 Library, but also included in many other GNU distributions. Compiling
50 and linking in this code is a waste when using the GNU C library
51 (especially if it is a shared library). Rather than having every GNU
52 program understand `configure --with-gnu-libc' and omit the object files,
53 it is simpler to just do this in the source for each such file. */
54
55 #define GETOPT_INTERFACE_VERSION 2
56 #if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2
57 # include <gnu-versions.h>
58 # if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
59 # define ELIDE_CODE
60 # endif
61 #endif
62
63 #ifndef ELIDE_CODE
64
65
66 /* This needs to come after some library #include
67 to get __GNU_LIBRARY__ defined. */
68 #ifdef __GNU_LIBRARY__
69 /* Don't include stdlib.h for non-GNU C libraries because some of them
70 contain conflicting prototypes for getopt. */
71 # include <stdlib.h>
72 # include <unistd.h>
73 #endif /* GNU C library. */
74
75 #ifdef VMS
76 # include <unixlib.h>
77 # if HAVE_STRING_H - 0
78 # include <string.h>
79 # endif
80 #endif
81
82 #ifndef _
83 /* This is for other GNU distributions with internationalized messages.
84 When compiling libc, the _ macro is predefined. */
85 # ifdef HAVE_LIBINTL_H
86 # include <libintl.h>
87 # define _(msgid) gettext (msgid)
88 # else
89 # define _(msgid) (msgid)
90 # endif
91 #endif
92
93 #ifdef _MSC_VER
94 #include <string.h>
95 #endif
96
97 /* This version of `getopt' appears to the caller like standard Unix `getopt'
98 but it behaves differently for the user, since it allows the user
99 to intersperse the options with the other arguments.
100
101 As `getopt' works, it permutes the elements of ARGV so that,
102 when it is done, all the options precede everything else. Thus
103 all application programs are extended to handle flexible argument order.
104
105 Setting the environment variable POSIXLY_CORRECT disables permutation.
106 Then the behavior is completely standard.
107
108 GNU application programs can use a third alternative mode in which
109 they can distinguish the relative order of options and other arguments. */
110
111 #include "getopt.h"
112
113 /* For communication from `getopt' to the caller.
114 When `getopt' finds an option that takes an argument,
115 the argument value is returned here.
116 Also, when `ordering' is RETURN_IN_ORDER,
117 each non-option ARGV-element is returned here. */
118
119 char *optarg = NULL;
120
121 /* Index in ARGV of the next element to be scanned.
122 This is used for communication to and from the caller
123 and for communication between successive calls to `getopt'.
124
125 On entry to `getopt', zero means this is the first call; initialize.
126
127 When `getopt' returns -1, this is the index of the first of the
128 non-option elements that the caller should itself scan.
129
130 Otherwise, `optind' communicates from one call to the next
131 how much of ARGV has been scanned so far. */
132
133 /* 1003.2 says this must be 1 before any call. */
134 int optind = 1;
135
136 /* Formerly, initialization of getopt depended on optind==0, which
137 causes problems with re-calling getopt as programs generally don't
138 know that. */
139
140 int __getopt_initialized = 0;
141
142 /* The next char to be scanned in the option-element
143 in which the last option character we returned was found.
144 This allows us to pick up the scan where we left off.
145
146 If this is zero, or a null string, it means resume the scan
147 by advancing to the next ARGV-element. */
148
149 static char *nextchar;
150
151 /* Callers store zero here to inhibit the error message
152 for unrecognized options. */
153
154 int opterr = 1;
155
156 /* Set to an option character which was unrecognized.
157 This must be initialized on some systems to avoid linking in the
158 system's own getopt implementation. */
159
160 int optopt = '?';
161
162 /* Describe how to deal with options that follow non-option ARGV-elements.
163
164 If the caller did not specify anything,
165 the default is REQUIRE_ORDER if the environment variable
166 POSIXLY_CORRECT is defined, PERMUTE otherwise.
167
168 REQUIRE_ORDER means don't recognize them as options;
169 stop option processing when the first non-option is seen.
170 This is what Unix does.
171 This mode of operation is selected by either setting the environment
172 variable POSIXLY_CORRECT, or using `+' as the first character
173 of the list of option characters.
174
175 PERMUTE is the default. We permute the contents of ARGV as we scan,
176 so that eventually all the non-options are at the end. This allows options
177 to be given in any order, even with programs that were not written to
178 expect this.
179
180 RETURN_IN_ORDER is an option available to programs that were written
181 to expect options and other ARGV-elements in any order and that care about
182 the ordering of the two. We describe each non-option ARGV-element
183 as if it were the argument of an option with character code 1.
184 Using `-' as the first character of the list of option characters
185 selects this mode of operation.
186
187 The special argument `--' forces an end of option-scanning regardless
188 of the value of `ordering'. In the case of RETURN_IN_ORDER, only
189 `--' can cause `getopt' to return -1 with `optind' != ARGC. */
190
191 static enum
192 {
193 REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
194 } ordering;
195
196 /* Value of POSIXLY_CORRECT environment variable. */
197 static char *posixly_correct;
198
199 #ifdef __GNU_LIBRARY__
200 /* We want to avoid inclusion of string.h with non-GNU libraries
201 because there are many ways it can cause trouble.
202 On some systems, it contains special magic macros that don't work
203 in GCC. */
204 # include <string.h>
205 # define my_index strchr
206 #else
207
208 # if HAVE_STRING_H
209 # include <string.h>
210 # else
211 # if HAVE_STRINGS_H
212 # include <strings.h>
213 # endif
214 # endif
215
216 /* Avoid depending on library functions or files
217 whose names are inconsistent. */
218
219 #ifndef getenv
220 extern char *getenv ();
221 #endif
222
223 static char *
224 my_index (str, chr)
225 const char *str;
226 int chr;
227 {
228 while (*str)
229 {
230 if (*str == chr)
231 return (char *) str;
232 str++;
233 }
234 return 0;
235 }
236
237 /* If using GCC, we can safely declare strlen this way.
238 If not using GCC, it is ok not to declare it. */
239 #ifdef __GNUC__
240 /* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h.
241 That was relevant to code that was here before. */
242 # if (!defined __STDC__ || !__STDC__) && !defined strlen
243 /* gcc with -traditional declares the built-in strlen to return int,
244 and has done so at least since version 2.4.5. -- rms. */
245 extern int strlen (const char *);
246 # endif /* not __STDC__ */
247 #endif /* __GNUC__ */
248
249 #endif /* not __GNU_LIBRARY__ */
250
251 /* Handle permutation of arguments. */
252
253 /* Describe the part of ARGV that contains non-options that have
254 been skipped. `first_nonopt' is the index in ARGV of the first of them;
255 `last_nonopt' is the index after the last of them. */
256
257 static int first_nonopt;
258 static int last_nonopt;
259
260 #ifdef _LIBC
261 /* Bash 2.0 gives us an environment variable containing flags
262 indicating ARGV elements that should not be considered arguments. */
263
264 /* Defined in getopt_init.c */
265 extern char *__getopt_nonoption_flags;
266
267 static int nonoption_flags_max_len;
268 static int nonoption_flags_len;
269
270 static int original_argc;
271 static char *const *original_argv;
272
273 /* Make sure the environment variable bash 2.0 puts in the environment
274 is valid for the getopt call we must make sure that the ARGV passed
275 to getopt is that one passed to the process. */
276 static void
277 __attribute__ ((unused))
278 store_args_and_env (int argc, char *const *argv)
279 {
280 /* XXX This is no good solution. We should rather copy the args so
281 that we can compare them later. But we must not use malloc(3). */
282 original_argc = argc;
283 original_argv = argv;
284 }
285 # ifdef text_set_element
286 text_set_element (__libc_subinit, store_args_and_env);
287 # endif /* text_set_element */
288
289 # define SWAP_FLAGS(ch1, ch2) \
290 if (nonoption_flags_len > 0) \
291 { \
292 char __tmp = __getopt_nonoption_flags[ch1]; \
293 __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \
294 __getopt_nonoption_flags[ch2] = __tmp; \
295 }
296 #else /* !_LIBC */
297 # define SWAP_FLAGS(ch1, ch2)
298 #endif /* _LIBC */
299
300 /* Exchange two adjacent subsequences of ARGV.
301 One subsequence is elements [first_nonopt,last_nonopt)
302 which contains all the non-options that have been skipped so far.
303 The other is elements [last_nonopt,optind), which contains all
304 the options processed since those non-options were skipped.
305
306 `first_nonopt' and `last_nonopt' are relocated so that they describe
307 the new indices of the non-options in ARGV after they are moved. */
308
309 #if defined __STDC__ && __STDC__
310 static void exchange (char **);
311 #endif
312
313 static void
314 exchange (argv)
315 char **argv;
316 {
317 int bottom = first_nonopt;
318 int middle = last_nonopt;
319 int top = optind;
320 char *tem;
321
322 /* Exchange the shorter segment with the far end of the longer segment.
323 That puts the shorter segment into the right place.
324 It leaves the longer segment in the right place overall,
325 but it consists of two parts that need to be swapped next. */
326
327 #ifdef _LIBC
328 /* First make sure the handling of the `__getopt_nonoption_flags'
329 string can work normally. Our top argument must be in the range
330 of the string. */
331 if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len)
332 {
333 /* We must extend the array. The user plays games with us and
334 presents new arguments. */
335 char *new_str = malloc (top + 1);
336 if (new_str == NULL)
337 nonoption_flags_len = nonoption_flags_max_len = 0;
338 else
339 {
340 memset (__mempcpy (new_str, __getopt_nonoption_flags,
341 nonoption_flags_max_len),
342 '\0', top + 1 - nonoption_flags_max_len);
343 nonoption_flags_max_len = top + 1;
344 __getopt_nonoption_flags = new_str;
345 }
346 }
347 #endif
348
349 while (top > middle && middle > bottom)
350 {
351 if (top - middle > middle - bottom)
352 {
353 /* Bottom segment is the short one. */
354 int len = middle - bottom;
355 register int i;
356
357 /* Swap it with the top part of the top segment. */
358 for (i = 0; i < len; i++)
359 {
360 tem = argv[bottom + i];
361 argv[bottom + i] = argv[top - (middle - bottom) + i];
362 argv[top - (middle - bottom) + i] = tem;
363 SWAP_FLAGS (bottom + i, top - (middle - bottom) + i);
364 }
365 /* Exclude the moved bottom segment from further swapping. */
366 top -= len;
367 }
368 else
369 {
370 /* Top segment is the short one. */
371 int len = top - middle;
372 register int i;
373
374 /* Swap it with the bottom part of the bottom segment. */
375 for (i = 0; i < len; i++)
376 {
377 tem = argv[bottom + i];
378 argv[bottom + i] = argv[middle + i];
379 argv[middle + i] = tem;
380 SWAP_FLAGS (bottom + i, middle + i);
381 }
382 /* Exclude the moved top segment from further swapping. */
383 bottom += len;
384 }
385 }
386
387 /* Update records for the slots the non-options now occupy. */
388
389 first_nonopt += (optind - last_nonopt);
390 last_nonopt = optind;
391 }
392
393 /* Initialize the internal data when the first call is made. */
394
395 #if defined __STDC__ && __STDC__
396 static const char *_getopt_initialize (int, char *const *, const char *);
397 #endif
398 static const char *
399 _getopt_initialize (argc, argv, optstring)
400 int argc;
401 char *const *argv;
402 const char *optstring;
403 {
404 /* Start processing options with ARGV-element 1 (since ARGV-element 0
405 is the program name); the sequence of previously skipped
406 non-option ARGV-elements is empty. */
407
408 first_nonopt = last_nonopt = optind;
409
410 nextchar = NULL;
411
412 posixly_correct = getenv ("POSIXLY_CORRECT");
413
414 /* Determine how to handle the ordering of options and nonoptions. */
415
416 if (optstring[0] == '-')
417 {
418 ordering = RETURN_IN_ORDER;
419 ++optstring;
420 }
421 else if (optstring[0] == '+')
422 {
423 ordering = REQUIRE_ORDER;
424 ++optstring;
425 }
426 else if (posixly_correct != NULL)
427 ordering = REQUIRE_ORDER;
428 else
429 ordering = PERMUTE;
430
431 #ifdef _LIBC
432 if (posixly_correct == NULL
433 && argc == original_argc && argv == original_argv)
434 {
435 if (nonoption_flags_max_len == 0)
436 {
437 if (__getopt_nonoption_flags == NULL
438 || __getopt_nonoption_flags[0] == '\0')
439 nonoption_flags_max_len = -1;
440 else
441 {
442 const char *orig_str = __getopt_nonoption_flags;
443 int len = nonoption_flags_max_len = strlen (orig_str);
444 if (nonoption_flags_max_len < argc)
445 nonoption_flags_max_len = argc;
446 __getopt_nonoption_flags =
447 (char *) malloc (nonoption_flags_max_len);
448 if (__getopt_nonoption_flags == NULL)
449 nonoption_flags_max_len = -1;
450 else
451 memset (__mempcpy (__getopt_nonoption_flags, orig_str, len),
452 '\0', nonoption_flags_max_len - len);
453 }
454 }
455 nonoption_flags_len = nonoption_flags_max_len;
456 }
457 else
458 nonoption_flags_len = 0;
459 #endif
460
461 return optstring;
462 }
463
464 /* Scan elements of ARGV (whose length is ARGC) for option characters
465 given in OPTSTRING.
466
467 If an element of ARGV starts with '-', and is not exactly "-" or "--",
468 then it is an option element. The characters of this element
469 (aside from the initial '-') are option characters. If `getopt'
470 is called repeatedly, it returns successively each of the option characters
471 from each of the option elements.
472
473 If `getopt' finds another option character, it returns that character,
474 updating `optind' and `nextchar' so that the next call to `getopt' can
475 resume the scan with the following option character or ARGV-element.
476
477 If there are no more option characters, `getopt' returns -1.
478 Then `optind' is the index in ARGV of the first ARGV-element
479 that is not an option. (The ARGV-elements have been permuted
480 so that those that are not options now come last.)
481
482 OPTSTRING is a string containing the legitimate option characters.
483 If an option character is seen that is not listed in OPTSTRING,
484 return '?' after printing an error message. If you set `opterr' to
485 zero, the error message is suppressed but we still return '?'.
486
487 If a char in OPTSTRING is followed by a colon, that means it wants an arg,
488 so the following text in the same ARGV-element, or the text of the following
489 ARGV-element, is returned in `optarg'. Two colons mean an option that
490 wants an optional arg; if there is text in the current ARGV-element,
491 it is returned in `optarg', otherwise `optarg' is set to zero.
492
493 If OPTSTRING starts with `-' or `+', it requests different methods of
494 handling the non-option ARGV-elements.
495 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
496
497 Long-named options begin with `--' instead of `-'.
498 Their names may be abbreviated as long as the abbreviation is unique
499 or is an exact match for some defined option. If they have an
500 argument, it follows the option name in the same ARGV-element, separated
501 from the option name by a `=', or else the in next ARGV-element.
502 When `getopt' finds a long-named option, it returns 0 if that option's
503 `flag' field is nonzero, the value of the option's `val' field
504 if the `flag' field is zero.
505
506 The elements of ARGV aren't really const, because we permute them.
507 But we pretend they're const in the prototype to be compatible
508 with other systems.
509
510 LONGOPTS is a vector of `struct option' terminated by an
511 element containing a name which is zero.
512
513 LONGIND returns the index in LONGOPT of the long-named option found.
514 It is only valid when a long-named option has been found by the most
515 recent call.
516
517 If LONG_ONLY is nonzero, '-' as well as '--' can introduce
518 long-named options. */
519
520 int
521 _getopt_internal (argc, argv, optstring, longopts, longind, long_only)
522 int argc;
523 char *const *argv;
524 const char *optstring;
525 const struct option *longopts;
526 int *longind;
527 int long_only;
528 {
529 optarg = NULL;
530
531 if (optind == 0 || !__getopt_initialized)
532 {
533 if (optind == 0)
534 optind = 1; /* Don't scan ARGV[0], the program name. */
535 optstring = _getopt_initialize (argc, argv, optstring);
536 __getopt_initialized = 1;
537 }
538
539 /* Test whether ARGV[optind] points to a non-option argument.
540 Either it does not have option syntax, or there is an environment flag
541 from the shell indicating it is not an option. The later information
542 is only used when the used in the GNU libc. */
543 #ifdef _LIBC
544 # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \
545 || (optind < nonoption_flags_len \
546 && __getopt_nonoption_flags[optind] == '1'))
547 #else
548 # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0')
549 #endif
550
551 if (nextchar == NULL || *nextchar == '\0')
552 {
553 /* Advance to the next ARGV-element. */
554
555 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been
556 moved back by the user (who may also have changed the arguments). */
557 if (last_nonopt > optind)
558 last_nonopt = optind;
559 if (first_nonopt > optind)
560 first_nonopt = optind;
561
562 if (ordering == PERMUTE)
563 {
564 /* If we have just processed some options following some non-options,
565 exchange them so that the options come first. */
566
567 if (first_nonopt != last_nonopt && last_nonopt != optind)
568 exchange ((char **) argv);
569 else if (last_nonopt != optind)
570 first_nonopt = optind;
571
572 /* Skip any additional non-options
573 and extend the range of non-options previously skipped. */
574
575 while (optind < argc && NONOPTION_P)
576 optind++;
577 last_nonopt = optind;
578 }
579
580 /* The special ARGV-element `--' means premature end of options.
581 Skip it like a null option,
582 then exchange with previous non-options as if it were an option,
583 then skip everything else like a non-option. */
584
585 if (optind != argc && !strcmp (argv[optind], "--"))
586 {
587 optind++;
588
589 if (first_nonopt != last_nonopt && last_nonopt != optind)
590 exchange ((char **) argv);
591 else if (first_nonopt == last_nonopt)
592 first_nonopt = optind;
593 last_nonopt = argc;
594
595 optind = argc;
596 }
597
598 /* If we have done all the ARGV-elements, stop the scan
599 and back over any non-options that we skipped and permuted. */
600
601 if (optind == argc)
602 {
603 /* Set the next-arg-index to point at the non-options
604 that we previously skipped, so the caller will digest them. */
605 if (first_nonopt != last_nonopt)
606 optind = first_nonopt;
607 return -1;
608 }
609
610 /* If we have come to a non-option and did not permute it,
611 either stop the scan or describe it to the caller and pass it by. */
612
613 if (NONOPTION_P)
614 {
615 if (ordering == REQUIRE_ORDER)
616 return -1;
617 optarg = argv[optind++];
618 return 1;
619 }
620
621 /* We have found another option-ARGV-element.
622 Skip the initial punctuation. */
623
624 nextchar = (argv[optind] + 1
625 + (longopts != NULL && argv[optind][1] == '-'));
626 }
627
628 /* Decode the current option-ARGV-element. */
629
630 /* Check whether the ARGV-element is a long option.
631
632 If long_only and the ARGV-element has the form "-f", where f is
633 a valid short option, don't consider it an abbreviated form of
634 a long option that starts with f. Otherwise there would be no
635 way to give the -f short option.
636
637 On the other hand, if there's a long option "fubar" and
638 the ARGV-element is "-fu", do consider that an abbreviation of
639 the long option, just like "--fu", and not "-f" with arg "u".
640
641 This distinction seems to be the most useful approach. */
642
643 if (longopts != NULL
644 && (argv[optind][1] == '-'
645 || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1])))))
646 {
647 char *nameend;
648 const struct option *p;
649 const struct option *pfound = NULL;
650 int exact = 0;
651 int ambig = 0;
652 int indfound = -1;
653 int option_index;
654
655 for (nameend = nextchar; *nameend && *nameend != '='; nameend++)
656 /* Do nothing. */ ;
657
658 /* Test all long options for either exact match
659 or abbreviated matches. */
660 for (p = longopts, option_index = 0; p->name; p++, option_index++)
661 if (!strncmp (p->name, nextchar, nameend - nextchar))
662 {
663 if ((unsigned int) (nameend - nextchar)
664 == (unsigned int) strlen (p->name))
665 {
666 /* Exact match found. */
667 pfound = p;
668 indfound = option_index;
669 exact = 1;
670 break;
671 }
672 else if (pfound == NULL)
673 {
674 /* First nonexact match found. */
675 pfound = p;
676 indfound = option_index;
677 }
678 else
679 /* Second or later nonexact match found. */
680 ambig = 1;
681 }
682
683 if (ambig && !exact)
684 {
685 if (opterr)
686 fprintf (stderr, _("%s: option `%s' is ambiguous\n"),
687 argv[0], argv[optind]);
688 nextchar += strlen (nextchar);
689 optind++;
690 optopt = 0;
691 return '?';
692 }
693
694 if (pfound != NULL)
695 {
696 option_index = indfound;
697 optind++;
698 if (*nameend)
699 {
700 /* Don't test has_arg with >, because some C compilers don't
701 allow it to be used on enums. */
702 if (pfound->has_arg)
703 optarg = nameend + 1;
704 else
705 {
706 if (opterr)
707 {
708 if (argv[optind - 1][1] == '-')
709 /* --option */
710 fprintf (stderr,
711 _("%s: option `--%s' doesn't allow an argument\n"),
712 argv[0], pfound->name);
713 else
714 /* +option or -option */
715 fprintf (stderr,
716 _("%s: option `%c%s' doesn't allow an argument\n"),
717 argv[0], argv[optind - 1][0], pfound->name);
718
719 nextchar += strlen (nextchar);
720
721 optopt = pfound->val;
722 return '?';
723 }
724 }
725 }
726 else if (pfound->has_arg == 1)
727 {
728 if (optind < argc)
729 optarg = argv[optind++];
730 else
731 {
732 if (opterr)
733 fprintf (stderr,
734 _("%s: option `%s' requires an argument\n"),
735 argv[0], argv[optind - 1]);
736 nextchar += strlen (nextchar);
737 optopt = pfound->val;
738 return optstring[0] == ':' ? ':' : '?';
739 }
740 }
741 nextchar += strlen (nextchar);
742 if (longind != NULL)
743 *longind = option_index;
744 if (pfound->flag)
745 {
746 *(pfound->flag) = pfound->val;
747 return 0;
748 }
749 return pfound->val;
750 }
751
752 /* Can't find it as a long option. If this is not getopt_long_only,
753 or the option starts with '--' or is not a valid short
754 option, then it's an error.
755 Otherwise interpret it as a short option. */
756 if (!long_only || argv[optind][1] == '-'
757 || my_index (optstring, *nextchar) == NULL)
758 {
759 if (opterr)
760 {
761 if (argv[optind][1] == '-')
762 /* --option */
763 fprintf (stderr, _("%s: unrecognized option `--%s'\n"),
764 argv[0], nextchar);
765 else
766 /* +option or -option */
767 fprintf (stderr, _("%s: unrecognized option `%c%s'\n"),
768 argv[0], argv[optind][0], nextchar);
769 }
770 nextchar = (char *) "";
771 optind++;
772 optopt = 0;
773 return '?';
774 }
775 }
776
777 /* Look at and handle the next short option-character. */
778
779 {
780 char c = *nextchar++;
781 char *temp = my_index (optstring, c);
782
783 /* Increment `optind' when we start to process its last character. */
784 if (*nextchar == '\0')
785 ++optind;
786
787 if (temp == NULL || c == ':')
788 {
789 if (opterr)
790 {
791 if (posixly_correct)
792 /* 1003.2 specifies the format of this message. */
793 fprintf (stderr, _("%s: illegal option -- %c\n"),
794 argv[0], c);
795 else
796 fprintf (stderr, _("%s: invalid option -- %c\n"),
797 argv[0], c);
798 }
799 optopt = c;
800 return '?';
801 }
802 /* Convenience. Treat POSIX -W foo same as long option --foo */
803 if (temp[0] == 'W' && temp[1] == ';')
804 {
805 char *nameend;
806 const struct option *p;
807 const struct option *pfound = NULL;
808 int exact = 0;
809 int ambig = 0;
810 int indfound = 0;
811 int option_index;
812
813 /* This is an option that requires an argument. */
814 if (*nextchar != '\0')
815 {
816 optarg = nextchar;
817 /* If we end this ARGV-element by taking the rest as an arg,
818 we must advance to the next element now. */
819 optind++;
820 }
821 else if (optind == argc)
822 {
823 if (opterr)
824 {
825 /* 1003.2 specifies the format of this message. */
826 fprintf (stderr, _("%s: option requires an argument -- %c\n"),
827 argv[0], c);
828 }
829 optopt = c;
830 if (optstring[0] == ':')
831 c = ':';
832 else
833 c = '?';
834 return c;
835 }
836 else
837 /* We already incremented `optind' once;
838 increment it again when taking next ARGV-elt as argument. */
839 optarg = argv[optind++];
840
841 /* optarg is now the argument, see if it's in the
842 table of longopts. */
843
844 for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++)
845 /* Do nothing. */ ;
846
847 /* Test all long options for either exact match
848 or abbreviated matches. */
849 for (p = longopts, option_index = 0; p->name; p++, option_index++)
850 if (!strncmp (p->name, nextchar, nameend - nextchar))
851 {
852 if ((unsigned int) (nameend - nextchar) == strlen (p->name))
853 {
854 /* Exact match found. */
855 pfound = p;
856 indfound = option_index;
857 exact = 1;
858 break;
859 }
860 else if (pfound == NULL)
861 {
862 /* First nonexact match found. */
863 pfound = p;
864 indfound = option_index;
865 }
866 else
867 /* Second or later nonexact match found. */
868 ambig = 1;
869 }
870 if (ambig && !exact)
871 {
872 if (opterr)
873 fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"),
874 argv[0], argv[optind]);
875 nextchar += strlen (nextchar);
876 optind++;
877 return '?';
878 }
879 if (pfound != NULL)
880 {
881 option_index = indfound;
882 if (*nameend)
883 {
884 /* Don't test has_arg with >, because some C compilers don't
885 allow it to be used on enums. */
886 if (pfound->has_arg)
887 optarg = nameend + 1;
888 else
889 {
890 if (opterr)
891 fprintf (stderr, _("\
892 %s: option `-W %s' doesn't allow an argument\n"),
893 argv[0], pfound->name);
894
895 nextchar += strlen (nextchar);
896 return '?';
897 }
898 }
899 else if (pfound->has_arg == 1)
900 {
901 if (optind < argc)
902 optarg = argv[optind++];
903 else
904 {
905 if (opterr)
906 fprintf (stderr,
907 _("%s: option `%s' requires an argument\n"),
908 argv[0], argv[optind - 1]);
909 nextchar += strlen (nextchar);
910 return optstring[0] == ':' ? ':' : '?';
911 }
912 }
913 nextchar += strlen (nextchar);
914 if (longind != NULL)
915 *longind = option_index;
916 if (pfound->flag)
917 {
918 *(pfound->flag) = pfound->val;
919 return 0;
920 }
921 return pfound->val;
922 }
923 nextchar = NULL;
924 return 'W'; /* Let the application handle it. */
925 }
926 if (temp[1] == ':')
927 {
928 if (temp[2] == ':')
929 {
930 /* This is an option that accepts an argument optionally. */
931 if (*nextchar != '\0')
932 {
933 optarg = nextchar;
934 optind++;
935 }
936 else
937 optarg = NULL;
938 nextchar = NULL;
939 }
940 else
941 {
942 /* This is an option that requires an argument. */
943 if (*nextchar != '\0')
944 {
945 optarg = nextchar;
946 /* If we end this ARGV-element by taking the rest as an arg,
947 we must advance to the next element now. */
948 optind++;
949 }
950 else if (optind == argc)
951 {
952 if (opterr)
953 {
954 /* 1003.2 specifies the format of this message. */
955 fprintf (stderr,
956 _("%s: option requires an argument -- %c\n"),
957 argv[0], c);
958 }
959 optopt = c;
960 if (optstring[0] == ':')
961 c = ':';
962 else
963 c = '?';
964 }
965 else
966 /* We already incremented `optind' once;
967 increment it again when taking next ARGV-elt as argument. */
968 optarg = argv[optind++];
969 nextchar = NULL;
970 }
971 }
972 return c;
973 }
974 }
975
976 int
977 getopt (argc, argv, optstring)
978 int argc;
979 char *const *argv;
980 const char *optstring;
981 {
982 return _getopt_internal (argc, argv, optstring,
983 (const struct option *) 0,
984 (int *) 0,
985 0);
986 }
987
988 #endif /* Not ELIDE_CODE. */
989
990 #ifdef TEST
991
992 /* Compile with -DTEST to make an executable for use in testing
993 the above definition of `getopt'. */
994
995 int
996 main (argc, argv)
997 int argc;
998 char **argv;
999 {
1000 int c;
1001 int digit_optind = 0;
1002
1003 while (1)
1004 {
1005 int this_option_optind = optind ? optind : 1;
1006
1007 c = getopt (argc, argv, "abc:d:0123456789");
1008 if (c == -1)
1009 break;
1010
1011 switch (c)
1012 {
1013 case '0':
1014 case '1':
1015 case '2':
1016 case '3':
1017 case '4':
1018 case '5':
1019 case '6':
1020 case '7':
1021 case '8':
1022 case '9':
1023 if (digit_optind != 0 && digit_optind != this_option_optind)
1024 printf ("digits occur in two different argv-elements.\n");
1025 digit_optind = this_option_optind;
1026 printf ("option %c\n", c);
1027 break;
1028
1029 case 'a':
1030 printf ("option a\n");
1031 break;
1032
1033 case 'b':
1034 printf ("option b\n");
1035 break;
1036
1037 case 'c':
1038 printf ("option c with value `%s'\n", optarg);
1039 break;
1040
1041 case '?':
1042 break;
1043
1044 default:
1045 printf ("?? getopt returned character code 0%o ??\n", c);
1046 }
1047 }
1048
1049 if (optind < argc)
1050 {
1051 printf ("non-option ARGV-elements: ");
1052 while (optind < argc)
1053 printf ("%s ", argv[optind++]);
1054 printf ("\n");
1055 }
1056
1057 exit (0);
1058 }
1059
1060 #endif /* TEST */