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, 99, 2000
7 Free Software Foundation, Inc.
8
9 The GNU C Library is free software; you can redistribute it and/or
10 modify it under the terms of the GNU Library General Public License as
11 published by the Free Software Foundation; either version 2 of the
12 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 Library General Public License for more details.
18
19 You should have received a copy of the GNU Library General Public
20 License along with the GNU C Library; see the file COPYING.LIB. If not,
21 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
23
24 /* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>.
25 Ditto for AIX 3.2 and <stdlib.h>. */
26 #ifndef _NO_PROTO
27 # define _NO_PROTO
28 #endif
29
30 #ifdef HAVE_CONFIG_H
31 # include <config.h>
32 #endif
33
34 #if !defined __STDC__ || !__STDC__
35 /* This is a separate conditional since some stdc systems
36 reject `defined (const)'. */
37 # ifndef const
38 # define const
39 # endif
40 #endif
41
42 #include <stdio.h>
43
44 /* Comment out all this code if we are using the GNU C Library, and are not
45 actually compiling the library itself. This code is part of the GNU C
46 Library, but also included in many other GNU distributions. Compiling
47 and linking in this code is a waste when using the GNU C library
48 (especially if it is a shared library). Rather than having every GNU
49 program understand `configure --with-gnu-libc' and omit the object files,
50 it is simpler to just do this in the source for each such file. */
51
52 #define GETOPT_INTERFACE_VERSION 2
53 #if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2
54 # include <gnu-versions.h>
55 # if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
56 # define ELIDE_CODE
57 # endif
58 #endif
59
60 #ifndef ELIDE_CODE
61
62
63 /* This needs to come after some library #include
64 to get __GNU_LIBRARY__ defined. */
65 #ifdef __GNU_LIBRARY__
66 /* Don't include stdlib.h for non-GNU C libraries because some of them
67 contain conflicting prototypes for getopt. */
68 # include <stdlib.h>
69 # include <unistd.h>
70 #endif /* GNU C library. */
71
72 #ifdef VMS
73 # include <unixlib.h>
74 # if HAVE_STRING_H - 0
75 # include <string.h>
76 # endif
77 #endif
78
79 #ifndef _
80 /* This is for other GNU distributions with internationalized messages.
81 When compiling libc, the _ macro is predefined. */
82 # ifdef HAVE_LIBINTL_H
83 # include <libintl.h>
84 # define _(msgid) gettext (msgid)
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 # include <string.h>
202 # if HAVE_STRINGS_H
203 # include <strings.h>
204 # endif
205
206 /* Avoid depending on library functions or files
207 whose names are inconsistent. */
208
209 #ifndef getenv
210 extern char *getenv ();
211 #endif
212
213 static char *
my_index(str,chr)214 my_index (str, chr)
215 const char *str;
216 int chr;
217 {
218 while (*str)
219 {
220 if (*str == chr)
221 return (char *) str;
222 str++;
223 }
224 return 0;
225 }
226
227 /* If using GCC, we can safely declare strlen this way.
228 If not using GCC, it is ok not to declare it. */
229 #ifdef __GNUC__
230 /* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h.
231 That was relevant to code that was here before. */
232 # if (!defined __STDC__ || !__STDC__) && !defined strlen
233 /* gcc with -traditional declares the built-in strlen to return int,
234 and has done so at least since version 2.4.5. -- rms. */
235 extern int strlen (const char *);
236 # endif /* not __STDC__ */
237 #endif /* __GNUC__ */
238
239 #endif /* not __GNU_LIBRARY__ */
240
241 /* Handle permutation of arguments. */
242
243 /* Describe the part of ARGV that contains non-options that have
244 been skipped. `first_nonopt' is the index in ARGV of the first of them;
245 `last_nonopt' is the index after the last of them. */
246
247 static int first_nonopt;
248 static int last_nonopt;
249
250 #ifdef _LIBC
251 /* Bash 2.0 gives us an environment variable containing flags
252 indicating ARGV elements that should not be considered arguments. */
253
254 /* Defined in getopt_init.c */
255 extern char *__getopt_nonoption_flags;
256
257 static int nonoption_flags_max_len;
258 static int nonoption_flags_len;
259
260 static int original_argc;
261 static char *const *original_argv;
262
263 /* Make sure the environment variable bash 2.0 puts in the environment
264 is valid for the getopt call we must make sure that the ARGV passed
265 to getopt is that one passed to the process. */
266 static void
267 __attribute__ ((unused))
store_args_and_env(int argc,char * const * argv)268 store_args_and_env (int argc, char *const *argv)
269 {
270 /* XXX This is no good solution. We should rather copy the args so
271 that we can compare them later. But we must not use malloc(3). */
272 original_argc = argc;
273 original_argv = argv;
274 }
275 # ifdef text_set_element
276 text_set_element (__libc_subinit, store_args_and_env);
277 # endif /* text_set_element */
278
279 # define SWAP_FLAGS(ch1, ch2) \
280 if (nonoption_flags_len > 0) \
281 { \
282 char __tmp = __getopt_nonoption_flags[ch1]; \
283 __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \
284 __getopt_nonoption_flags[ch2] = __tmp; \
285 }
286 #else /* !_LIBC */
287 # define SWAP_FLAGS(ch1, ch2)
288 #endif /* _LIBC */
289
290 /* Exchange two adjacent subsequences of ARGV.
291 One subsequence is elements [first_nonopt,last_nonopt)
292 which contains all the non-options that have been skipped so far.
293 The other is elements [last_nonopt,optind), which contains all
294 the options processed since those non-options were skipped.
295
296 `first_nonopt' and `last_nonopt' are relocated so that they describe
297 the new indices of the non-options in ARGV after they are moved. */
298
299 #if defined __STDC__ && __STDC__
300 static void exchange (char **);
301 #endif
302
303 static void
exchange(argv)304 exchange (argv)
305 char **argv;
306 {
307 int bottom = first_nonopt;
308 int middle = last_nonopt;
309 int top = optind;
310 char *tem;
311
312 /* Exchange the shorter segment with the far end of the longer segment.
313 That puts the shorter segment into the right place.
314 It leaves the longer segment in the right place overall,
315 but it consists of two parts that need to be swapped next. */
316
317 #ifdef _LIBC
318 /* First make sure the handling of the `__getopt_nonoption_flags'
319 string can work normally. Our top argument must be in the range
320 of the string. */
321 if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len)
322 {
323 /* We must extend the array. The user plays games with us and
324 presents new arguments. */
325 char *new_str = malloc (top + 1);
326 if (new_str == NULL)
327 nonoption_flags_len = nonoption_flags_max_len = 0;
328 else
329 {
330 memcpy (new_str, __getopt_nonoption_flags,
331 nonoption_flags_max_len);
332 memset (new_str + nonoption_flags_max_len,
333 '\0', top + 1 - nonoption_flags_max_len);
334 nonoption_flags_max_len = top + 1;
335 __getopt_nonoption_flags = new_str;
336 }
337 }
338 #endif
339
340 while (top > middle && middle > bottom)
341 {
342 if (top - middle > middle - bottom)
343 {
344 /* Bottom segment is the short one. */
345 int len = middle - bottom;
346 register int i;
347
348 /* Swap it with the top part of the top segment. */
349 for (i = 0; i < len; i++)
350 {
351 tem = argv[bottom + i];
352 argv[bottom + i] = argv[top - (middle - bottom) + i];
353 argv[top - (middle - bottom) + i] = tem;
354 SWAP_FLAGS (bottom + i, top - (middle - bottom) + i);
355 }
356 /* Exclude the moved bottom segment from further swapping. */
357 top -= len;
358 }
359 else
360 {
361 /* Top segment is the short one. */
362 int len = top - middle;
363 register int i;
364
365 /* Swap it with the bottom part of the bottom segment. */
366 for (i = 0; i < len; i++)
367 {
368 tem = argv[bottom + i];
369 argv[bottom + i] = argv[middle + i];
370 argv[middle + i] = tem;
371 SWAP_FLAGS (bottom + i, middle + i);
372 }
373 /* Exclude the moved top segment from further swapping. */
374 bottom += len;
375 }
376 }
377
378 /* Update records for the slots the non-options now occupy. */
379
380 first_nonopt += (optind - last_nonopt);
381 last_nonopt = optind;
382 }
383
384 /* Initialize the internal data when the first call is made. */
385
386 #if defined __STDC__ && __STDC__
387 static const char *_getopt_initialize (int, char *const *, const char *);
388 #endif
389 static const char *
_getopt_initialize(argc,argv,optstring)390 _getopt_initialize (argc, argv, optstring)
391 int argc;
392 char *const *argv;
393 const char *optstring;
394 {
395 /* Start processing options with ARGV-element 1 (since ARGV-element 0
396 is the program name); the sequence of previously skipped
397 non-option ARGV-elements is empty. */
398
399 first_nonopt = last_nonopt = optind;
400
401 nextchar = NULL;
402
403 posixly_correct = getenv ("POSIXLY_CORRECT");
404
405 /* Determine how to handle the ordering of options and nonoptions. */
406
407 if (optstring[0] == '-')
408 {
409 ordering = RETURN_IN_ORDER;
410 ++optstring;
411 }
412 else if (optstring[0] == '+')
413 {
414 ordering = REQUIRE_ORDER;
415 ++optstring;
416 }
417 else if (posixly_correct != NULL)
418 ordering = REQUIRE_ORDER;
419 else
420 ordering = PERMUTE;
421
422 #ifdef _LIBC
423 if (posixly_correct == NULL
424 && argc == original_argc && argv == original_argv)
425 {
426 if (nonoption_flags_max_len == 0)
427 {
428 if (__getopt_nonoption_flags == NULL
429 || __getopt_nonoption_flags[0] == '\0')
430 nonoption_flags_max_len = -1;
431 else
432 {
433 const char *orig_str = __getopt_nonoption_flags;
434 int len = nonoption_flags_max_len = strlen (orig_str);
435 if (nonoption_flags_max_len < argc)
436 nonoption_flags_max_len = argc;
437 __getopt_nonoption_flags =
438 (char *) malloc (nonoption_flags_max_len);
439 if (__getopt_nonoption_flags == NULL)
440 nonoption_flags_max_len = -1;
441 else {
442 memcpy (__getopt_nonoption_flags, orig_str, len);
443 memset (__getopt_nonoption_flags + len,
444 '\0', nonoption_flags_max_len - len);
445 }
446 }
447 }
448 nonoption_flags_len = nonoption_flags_max_len;
449 }
450 else
451 nonoption_flags_len = 0;
452 #endif
453
454 return optstring;
455 }
456
457 /* Scan elements of ARGV (whose length is ARGC) for option characters
458 given in OPTSTRING.
459
460 If an element of ARGV starts with '-', and is not exactly "-" or "--",
461 then it is an option element. The characters of this element
462 (aside from the initial '-') are option characters. If `getopt'
463 is called repeatedly, it returns successively each of the option characters
464 from each of the option elements.
465
466 If `getopt' finds another option character, it returns that character,
467 updating `optind' and `nextchar' so that the next call to `getopt' can
468 resume the scan with the following option character or ARGV-element.
469
470 If there are no more option characters, `getopt' returns -1.
471 Then `optind' is the index in ARGV of the first ARGV-element
472 that is not an option. (The ARGV-elements have been permuted
473 so that those that are not options now come last.)
474
475 OPTSTRING is a string containing the legitimate option characters.
476 If an option character is seen that is not listed in OPTSTRING,
477 return '?' after printing an error message. If you set `opterr' to
478 zero, the error message is suppressed but we still return '?'.
479
480 If a char in OPTSTRING is followed by a colon, that means it wants an arg,
481 so the following text in the same ARGV-element, or the text of the following
482 ARGV-element, is returned in `optarg'. Two colons mean an option that
483 wants an optional arg; if there is text in the current ARGV-element,
484 it is returned in `optarg', otherwise `optarg' is set to zero.
485
486 If OPTSTRING starts with `-' or `+', it requests different methods of
487 handling the non-option ARGV-elements.
488 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
489
490 Long-named options begin with `--' instead of `-'.
491 Their names may be abbreviated as long as the abbreviation is unique
492 or is an exact match for some defined option. If they have an
493 argument, it follows the option name in the same ARGV-element, separated
494 from the option name by a `=', or else the in next ARGV-element.
495 When `getopt' finds a long-named option, it returns 0 if that option's
496 `flag' field is nonzero, the value of the option's `val' field
497 if the `flag' field is zero.
498
499 The elements of ARGV aren't really const, because we permute them.
500 But we pretend they're const in the prototype to be compatible
501 with other systems.
502
503 LONGOPTS is a vector of `struct option' terminated by an
504 element containing a name which is zero.
505
506 LONGIND returns the index in LONGOPT of the long-named option found.
507 It is only valid when a long-named option has been found by the most
508 recent call.
509
510 If LONG_ONLY is nonzero, '-' as well as '--' can introduce
511 long-named options. */
512
513 int
_getopt_internal(argc,argv,optstring,longopts,longind,long_only)514 _getopt_internal (argc, argv, optstring, longopts, longind, long_only)
515 int argc;
516 char *const *argv;
517 const char *optstring;
518 const struct option *longopts;
519 int *longind;
520 int long_only;
521 {
522 int print_errors = opterr;
523 if (optstring[0] == ':')
524 print_errors = 0;
525
526 optarg = NULL;
527
528 if (optind == 0 || !__getopt_initialized)
529 {
530 if (optind == 0)
531 optind = 1; /* Don't scan ARGV[0], the program name. */
532 optstring = _getopt_initialize (argc, argv, optstring);
533 __getopt_initialized = 1;
534 }
535
536 /* Test whether ARGV[optind] points to a non-option argument.
537 Either it does not have option syntax, or there is an environment flag
538 from the shell indicating it is not an option. The later information
539 is only used when the used in the GNU libc. */
540 #ifdef _LIBC
541 # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \
542 || (optind < nonoption_flags_len \
543 && __getopt_nonoption_flags[optind] == '1'))
544 #else
545 # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0')
546 #endif
547
548 if (nextchar == NULL || *nextchar == '\0')
549 {
550 /* Advance to the next ARGV-element. */
551
552 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been
553 moved back by the user (who may also have changed the arguments). */
554 if (last_nonopt > optind)
555 last_nonopt = optind;
556 if (first_nonopt > optind)
557 first_nonopt = optind;
558
559 if (ordering == PERMUTE)
560 {
561 /* If we have just processed some options following some non-options,
562 exchange them so that the options come first. */
563
564 if (first_nonopt != last_nonopt && last_nonopt != optind)
565 exchange ((char **) argv);
566 else if (last_nonopt != optind)
567 first_nonopt = optind;
568
569 /* Skip any additional non-options
570 and extend the range of non-options previously skipped. */
571
572 while (optind < argc && NONOPTION_P)
573 optind++;
574 last_nonopt = optind;
575 }
576
577 /* The special ARGV-element `--' means premature end of options.
578 Skip it like a null option,
579 then exchange with previous non-options as if it were an option,
580 then skip everything else like a non-option. */
581
582 if (optind != argc && !strcmp (argv[optind], "--"))
583 {
584 optind++;
585
586 if (first_nonopt != last_nonopt && last_nonopt != optind)
587 exchange ((char **) argv);
588 else if (first_nonopt == last_nonopt)
589 first_nonopt = optind;
590 last_nonopt = argc;
591
592 optind = argc;
593 }
594
595 /* If we have done all the ARGV-elements, stop the scan
596 and back over any non-options that we skipped and permuted. */
597
598 if (optind == argc)
599 {
600 /* Set the next-arg-index to point at the non-options
601 that we previously skipped, so the caller will digest them. */
602 if (first_nonopt != last_nonopt)
603 optind = first_nonopt;
604 return -1;
605 }
606
607 /* If we have come to a non-option and did not permute it,
608 either stop the scan or describe it to the caller and pass it by. */
609
610 if (NONOPTION_P)
611 {
612 if (ordering == REQUIRE_ORDER)
613 return -1;
614 optarg = argv[optind++];
615 return 1;
616 }
617
618 /* We have found another option-ARGV-element.
619 Skip the initial punctuation. */
620
621 nextchar = (argv[optind] + 1
622 + (longopts != NULL && argv[optind][1] == '-'));
623 }
624
625 /* Decode the current option-ARGV-element. */
626
627 /* Check whether the ARGV-element is a long option.
628
629 If long_only and the ARGV-element has the form "-f", where f is
630 a valid short option, don't consider it an abbreviated form of
631 a long option that starts with f. Otherwise there would be no
632 way to give the -f short option.
633
634 On the other hand, if there's a long option "fubar" and
635 the ARGV-element is "-fu", do consider that an abbreviation of
636 the long option, just like "--fu", and not "-f" with arg "u".
637
638 This distinction seems to be the most useful approach. */
639
640 if (longopts != NULL
641 && (argv[optind][1] == '-'
642 || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1])))))
643 {
644 char *nameend;
645 const struct option *p;
646 const struct option *pfound = NULL;
647 int exact = 0;
648 int ambig = 0;
649 int indfound = -1;
650 int option_index;
651
652 for (nameend = nextchar; *nameend && *nameend != '='; nameend++)
653 /* Do nothing. */ ;
654
655 /* Test all long options for either exact match
656 or abbreviated matches. */
657 for (p = longopts, option_index = 0; p->name; p++, option_index++)
658 if (!strncmp (p->name, nextchar, nameend - nextchar))
659 {
660 if ((unsigned int) (nameend - nextchar)
661 == (unsigned int) strlen (p->name))
662 {
663 /* Exact match found. */
664 pfound = p;
665 indfound = option_index;
666 exact = 1;
667 break;
668 }
669 else if (pfound == NULL)
670 {
671 /* First nonexact match found. */
672 pfound = p;
673 indfound = option_index;
674 }
675 else
676 /* Second or later nonexact match found. */
677 ambig = 1;
678 }
679
680 if (ambig && !exact)
681 {
682 if (print_errors)
683 fprintf (stderr, _("%s: option `%s' is ambiguous\n"),
684 argv[0], argv[optind]);
685 nextchar += strlen (nextchar);
686 optind++;
687 optopt = 0;
688 return '?';
689 }
690
691 if (pfound != NULL)
692 {
693 option_index = indfound;
694 optind++;
695 if (*nameend)
696 {
697 /* Don't test has_arg with >, because some C compilers don't
698 allow it to be used on enums. */
699 if (pfound->has_arg)
700 optarg = nameend + 1;
701 else
702 {
703 if (print_errors)
704 {
705 if (argv[optind - 1][1] == '-')
706 /* --option */
707 fprintf (stderr,
708 _("%s: option `--%s' doesn't allow an argument\n"),
709 argv[0], pfound->name);
710 else
711 /* +option or -option */
712 fprintf (stderr,
713 _("%s: option `%c%s' doesn't allow an argument\n"),
714 argv[0], argv[optind - 1][0], pfound->name);
715 }
716
717 nextchar += strlen (nextchar);
718
719 optopt = pfound->val;
720 return '?';
721 }
722 }
723 else if (pfound->has_arg == 1)
724 {
725 if (optind < argc)
726 optarg = argv[optind++];
727 else
728 {
729 if (print_errors)
730 fprintf (stderr,
731 _("%s: option `%s' requires an argument\n"),
732 argv[0], argv[optind - 1]);
733 nextchar += strlen (nextchar);
734 optopt = pfound->val;
735 return optstring[0] == ':' ? ':' : '?';
736 }
737 }
738 nextchar += strlen (nextchar);
739 if (longind != NULL)
740 *longind = option_index;
741 if (pfound->flag)
742 {
743 *(pfound->flag) = pfound->val;
744 return 0;
745 }
746 return pfound->val;
747 }
748
749 /* Can't find it as a long option. If this is not getopt_long_only,
750 or the option starts with '--' or is not a valid short
751 option, then it's an error.
752 Otherwise interpret it as a short option. */
753 if (!long_only || argv[optind][1] == '-'
754 || my_index (optstring, *nextchar) == NULL)
755 {
756 if (print_errors)
757 {
758 if (argv[optind][1] == '-')
759 /* --option */
760 fprintf (stderr, _("%s: unrecognized option `--%s'\n"),
761 argv[0], nextchar);
762 else
763 /* +option or -option */
764 fprintf (stderr, _("%s: unrecognized option `%c%s'\n"),
765 argv[0], argv[optind][0], nextchar);
766 }
767 nextchar = (char *) "";
768 optind++;
769 optopt = 0;
770 return '?';
771 }
772 }
773
774 /* Look at and handle the next short option-character. */
775
776 {
777 char c = *nextchar++;
778 char *temp = my_index (optstring, c);
779
780 /* Increment `optind' when we start to process its last character. */
781 if (*nextchar == '\0')
782 ++optind;
783
784 if (temp == NULL || c == ':')
785 {
786 if (print_errors)
787 {
788 if (posixly_correct)
789 /* 1003.2 specifies the format of this message. */
790 fprintf (stderr, _("%s: illegal option -- %c\n"),
791 argv[0], c);
792 else
793 fprintf (stderr, _("%s: invalid option -- %c\n"),
794 argv[0], c);
795 }
796 optopt = c;
797 return '?';
798 }
799 /* Convenience. Treat POSIX -W foo same as long option --foo */
800 if (temp[0] == 'W' && temp[1] == ';')
801 {
802 char *nameend;
803 const struct option *p;
804 const struct option *pfound = NULL;
805 int exact = 0;
806 int ambig = 0;
807 int indfound = 0;
808 int option_index;
809
810 /* This is an option that requires an argument. */
811 if (*nextchar != '\0')
812 {
813 optarg = nextchar;
814 /* If we end this ARGV-element by taking the rest as an arg,
815 we must advance to the next element now. */
816 optind++;
817 }
818 else if (optind == argc)
819 {
820 if (print_errors)
821 {
822 /* 1003.2 specifies the format of this message. */
823 fprintf (stderr, _("%s: option requires an argument -- %c\n"),
824 argv[0], c);
825 }
826 optopt = c;
827 if (optstring[0] == ':')
828 c = ':';
829 else
830 c = '?';
831 return c;
832 }
833 else
834 /* We already incremented `optind' once;
835 increment it again when taking next ARGV-elt as argument. */
836 optarg = argv[optind++];
837
838 /* optarg is now the argument, see if it's in the
839 table of longopts. */
840
841 for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++)
842 /* Do nothing. */ ;
843
844 /* Test all long options for either exact match
845 or abbreviated matches. */
846 for (p = longopts, option_index = 0; p->name; p++, option_index++)
847 if (!strncmp (p->name, nextchar, nameend - nextchar))
848 {
849 if ((unsigned int) (nameend - nextchar) == strlen (p->name))
850 {
851 /* Exact match found. */
852 pfound = p;
853 indfound = option_index;
854 exact = 1;
855 break;
856 }
857 else if (pfound == NULL)
858 {
859 /* First nonexact match found. */
860 pfound = p;
861 indfound = option_index;
862 }
863 else
864 /* Second or later nonexact match found. */
865 ambig = 1;
866 }
867 if (ambig && !exact)
868 {
869 if (print_errors)
870 fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"),
871 argv[0], argv[optind]);
872 nextchar += strlen (nextchar);
873 optind++;
874 return '?';
875 }
876 if (pfound != NULL)
877 {
878 option_index = indfound;
879 if (*nameend)
880 {
881 /* Don't test has_arg with >, because some C compilers don't
882 allow it to be used on enums. */
883 if (pfound->has_arg)
884 optarg = nameend + 1;
885 else
886 {
887 if (print_errors)
888 fprintf (stderr, _("%s: option `-W %s' doesn't allow an argument\n"),
889 argv[0], pfound->name);
890
891 nextchar += strlen (nextchar);
892 return '?';
893 }
894 }
895 else if (pfound->has_arg == 1)
896 {
897 if (optind < argc)
898 optarg = argv[optind++];
899 else
900 {
901 if (print_errors)
902 fprintf (stderr,
903 _("%s: option `%s' requires an argument\n"),
904 argv[0], argv[optind - 1]);
905 nextchar += strlen (nextchar);
906 return optstring[0] == ':' ? ':' : '?';
907 }
908 }
909 nextchar += strlen (nextchar);
910 if (longind != NULL)
911 *longind = option_index;
912 if (pfound->flag)
913 {
914 *(pfound->flag) = pfound->val;
915 return 0;
916 }
917 return pfound->val;
918 }
919 nextchar = NULL;
920 return 'W'; /* Let the application handle it. */
921 }
922 if (temp[1] == ':')
923 {
924 if (temp[2] == ':')
925 {
926 /* This is an option that accepts an argument optionally. */
927 if (*nextchar != '\0')
928 {
929 optarg = nextchar;
930 optind++;
931 }
932 else
933 optarg = NULL;
934 nextchar = NULL;
935 }
936 else
937 {
938 /* This is an option that requires an argument. */
939 if (*nextchar != '\0')
940 {
941 optarg = nextchar;
942 /* If we end this ARGV-element by taking the rest as an arg,
943 we must advance to the next element now. */
944 optind++;
945 }
946 else if (optind == argc)
947 {
948 if (print_errors)
949 {
950 /* 1003.2 specifies the format of this message. */
951 fprintf (stderr,
952 _("%s: option requires an argument -- %c\n"),
953 argv[0], c);
954 }
955 optopt = c;
956 if (optstring[0] == ':')
957 c = ':';
958 else
959 c = '?';
960 }
961 else
962 /* We already incremented `optind' once;
963 increment it again when taking next ARGV-elt as argument. */
964 optarg = argv[optind++];
965 nextchar = NULL;
966 }
967 }
968 return c;
969 }
970 }
971
972 int
getopt(argc,argv,optstring)973 getopt (argc, argv, optstring)
974 int argc;
975 char *const *argv;
976 const char *optstring;
977 {
978 return _getopt_internal (argc, argv, optstring,
979 (const struct option *) 0,
980 (int *) 0,
981 0);
982 }
983
984 #endif /* Not ELIDE_CODE. */
985