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# Content
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 roland@gnu.ai.mit.edu
4 before changing it!
5
6 Copyright (C) 1987, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97
7 Free Software Foundation, Inc.
8
9 NOTE: The canonical source of this file is maintained with the GNU C Library.
10 Bugs can be reported to bug-glibc@prep.ai.mit.edu.
11
12 This file is part of GVPE.
13
14 GVPE is free software; you can redistribute it and/or modify it
15 under the terms of the GNU General Public License as published by the
16 Free Software Foundation; either version 2, or (at your option) any
17 later version.
18
19 This program is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 GNU General Public License for more details.
23
24 You should have received a copy of the GNU General Public License
25 along with gvpe; if not, write to the Free Software
26 Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27 */
28
29 /* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>.
30 Ditto for AIX 3.2 and <stdlib.h>. */
31 #ifndef _NO_PROTO
32 #define _NO_PROTO
33 #endif
34
35 #ifdef HAVE_CONFIG_H
36 #include <config.h>
37 #endif
38
39 #if !defined (__STDC__) || !__STDC__
40 /* This is a separate conditional since some stdc systems
41 reject `defined (const)'. */
42 #ifndef const
43 #define const
44 #endif
45 #endif
46
47 #include <stdio.h>
48
49 /* Comment out all this code if we are using the GNU C Library, and are not
50 actually compiling the library itself. This code is part of the GNU C
51 Library, but also included in many other GNU distributions. Compiling
52 and linking in this code is a waste when using the GNU C library
53 (especially if it is a shared library). Rather than having every GNU
54 program understand `configure --with-gnu-libc' and omit the object files,
55 it is simpler to just do this in the source for each such file. */
56
57 #define GETOPT_INTERFACE_VERSION 2
58 #if !defined (_LIBC) && defined (__GLIBC__) && __GLIBC__ >= 2
59 #include <gnu-versions.h>
60 #if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
61 #define ELIDE_CODE
62 #endif
63 #endif
64
65 #ifndef ELIDE_CODE
66
67
68 /* This needs to come after some library #include
69 to get __GNU_LIBRARY__ defined. */
70 #ifdef __GNU_LIBRARY__
71 /* Don't include stdlib.h for non-GNU C libraries because some of them
72 contain conflicting prototypes for getopt. */
73 #include <stdlib.h>
74 #include <unistd.h>
75 #endif /* GNU C library. */
76
77 #ifdef VMS
78 #include <unixlib.h>
79 #if HAVE_STRING_H - 0
80 #include <string.h>
81 #endif
82 #endif
83
84 #if defined (WIN32) && !defined (__CYGWIN32__)
85 /* It's not Unix, really. See? Capital letters. */
86 #include <windows.h>
87 #define getpid() GetCurrentProcessId()
88 #endif
89
90 #include "gettext.h"
91
92 /* This version of `getopt' appears to the caller like standard Unix `getopt'
93 but it behaves differently for the user, since it allows the user
94 to intersperse the options with the other arguments.
95
96 As `getopt' works, it permutes the elements of ARGV so that,
97 when it is done, all the options precede everything else. Thus
98 all application programs are extended to handle flexible argument order.
99
100 Setting the environment variable POSIXLY_CORRECT disables permutation.
101 Then the behavior is completely standard.
102
103 GNU application programs can use a third alternative mode in which
104 they can distinguish the relative order of options and other arguments. */
105
106 #include "getopt.h"
107
108 /* For communication from `getopt' to the caller.
109 When `getopt' finds an option that takes an argument,
110 the argument value is returned here.
111 Also, when `ordering' is RETURN_IN_ORDER,
112 each non-option ARGV-element is returned here. */
113
114 char *optarg = NULL;
115
116 /* Index in ARGV of the next element to be scanned.
117 This is used for communication to and from the caller
118 and for communication between successive calls to `getopt'.
119
120 On entry to `getopt', zero means this is the first call; initialize.
121
122 When `getopt' returns -1, this is the index of the first of the
123 non-option elements that the caller should itself scan.
124
125 Otherwise, `optind' communicates from one call to the next
126 how much of ARGV has been scanned so far. */
127
128 /* 1003.2 says this must be 1 before any call. */
129 int optind = 1;
130
131 /* Formerly, initialization of getopt depended on optind==0, which
132 causes problems with re-calling getopt as programs generally don't
133 know that. */
134
135 int __getopt_initialized = 0;
136
137 /* The next char to be scanned in the option-element
138 in which the last option character we returned was found.
139 This allows us to pick up the scan where we left off.
140
141 If this is zero, or a null string, it means resume the scan
142 by advancing to the next ARGV-element. */
143
144 static char *nextchar;
145
146 /* Callers store zero here to inhibit the error message
147 for unrecognized options. */
148
149 int opterr = 1;
150
151 /* Set to an option character which was unrecognized.
152 This must be initialized on some systems to avoid linking in the
153 system's own getopt implementation. */
154
155 int optopt = '?';
156
157 /* Describe how to deal with options that follow non-option ARGV-elements.
158
159 If the caller did not specify anything,
160 the default is REQUIRE_ORDER if the environment variable
161 POSIXLY_CORRECT is defined, PERMUTE otherwise.
162
163 REQUIRE_ORDER means don't recognize them as options;
164 stop option processing when the first non-option is seen.
165 This is what Unix does.
166 This mode of operation is selected by either setting the environment
167 variable POSIXLY_CORRECT, or using `+' as the first character
168 of the list of option characters.
169
170 PERMUTE is the default. We permute the contents of ARGV as we scan,
171 so that eventually all the non-options are at the end. This allows options
172 to be given in any order, even with programs that were not written to
173 expect this.
174
175 RETURN_IN_ORDER is an option available to programs that were written
176 to expect options and other ARGV-elements in any order and that care about
177 the ordering of the two. We describe each non-option ARGV-element
178 as if it were the argument of an option with character code 1.
179 Using `-' as the first character of the list of option characters
180 selects this mode of operation.
181
182 The special argument `--' forces an end of option-scanning regardless
183 of the value of `ordering'. In the case of RETURN_IN_ORDER, only
184 `--' can cause `getopt' to return -1 with `optind' != ARGC. */
185
186 static enum
187 {
188 REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
189 } ordering;
190
191 /* Value of POSIXLY_CORRECT environment variable. */
192 static char *posixly_correct;
193
194 #ifdef __GNU_LIBRARY__
195 /* We want to avoid inclusion of string.h with non-GNU libraries
196 because there are many ways it can cause trouble.
197 On some systems, it contains special magic macros that don't work
198 in GCC. */
199 #include <string.h>
200 #define my_index strchr
201 #else
202
203 /* Avoid depending on library functions or files
204 whose names are inconsistent. */
205
206 char *getenv ();
207
208 static char *
209 my_index (str, chr)
210 const char *str;
211 int chr;
212 {
213 while (*str)
214 {
215 if (*str == chr)
216 return (char *) str;
217 str++;
218 }
219 return 0;
220 }
221
222 /* If using GCC, we can safely declare strlen this way.
223 If not using GCC, it is ok not to declare it. */
224 #ifdef __GNUC__
225 /* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h.
226 That was relevant to code that was here before. */
227 #if !defined (__STDC__) || !__STDC__
228 /* gcc with -traditional declares the built-in strlen to return int,
229 and has done so at least since version 2.4.5. -- rms. */
230 extern int strlen (const char *);
231 #endif /* not __STDC__ */
232 #endif /* __GNUC__ */
233
234 #endif /* not __GNU_LIBRARY__ */
235
236 /* Handle permutation of arguments. */
237
238 /* Describe the part of ARGV that contains non-options that have
239 been skipped. `first_nonopt' is the index in ARGV of the first of them;
240 `last_nonopt' is the index after the last of them. */
241
242 static int first_nonopt;
243 static int last_nonopt;
244
245 #ifdef _LIBC
246 /* Bash 2.0 gives us an environment variable containing flags
247 indicating ARGV elements that should not be considered arguments. */
248
249 /* Defined in getopt_init.c */
250 extern char *__getopt_nonoption_flags;
251
252 static int nonoption_flags_max_len;
253 static int nonoption_flags_len;
254
255 static int original_argc;
256 static char *const *original_argv;
257
258 extern pid_t __libc_pid;
259
260 /* Make sure the environment variable bash 2.0 puts in the environment
261 is valid for the getopt call we must make sure that the ARGV passed
262 to getopt is that one passed to the process. */
263 static void
264 __attribute__ ((unused))
265 store_args_and_env (int argc, char *const *argv)
266 {
267 /* XXX This is no good solution. We should rather copy the args so
268 that we can compare them later. But we must not use malloc(3). */
269 original_argc = argc;
270 original_argv = argv;
271 }
272 text_set_element (__libc_subinit, store_args_and_env);
273
274 # define SWAP_FLAGS(ch1, ch2) \
275 if (nonoption_flags_len > 0) \
276 { \
277 char __tmp = __getopt_nonoption_flags[ch1]; \
278 __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \
279 __getopt_nonoption_flags[ch2] = __tmp; \
280 }
281 #else /* !_LIBC */
282 # define SWAP_FLAGS(ch1, ch2)
283 #endif /* _LIBC */
284
285 /* Exchange two adjacent subsequences of ARGV.
286 One subsequence is elements [first_nonopt,last_nonopt)
287 which contains all the non-options that have been skipped so far.
288 The other is elements [last_nonopt,optind), which contains all
289 the options processed since those non-options were skipped.
290
291 `first_nonopt' and `last_nonopt' are relocated so that they describe
292 the new indices of the non-options in ARGV after they are moved. */
293
294 #if defined (__STDC__) && __STDC__
295 static void exchange (char **);
296 #endif
297
298 static void
299 exchange (argv)
300 char **argv;
301 {
302 int bottom = first_nonopt;
303 int middle = last_nonopt;
304 int top = optind;
305 char *tem;
306
307 /* Exchange the shorter segment with the far end of the longer segment.
308 That puts the shorter segment into the right place.
309 It leaves the longer segment in the right place overall,
310 but it consists of two parts that need to be swapped next. */
311
312 #ifdef _LIBC
313 /* First make sure the handling of the `__getopt_nonoption_flags'
314 string can work normally. Our top argument must be in the range
315 of the string. */
316 if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len)
317 {
318 /* We must extend the array. The user plays games with us and
319 presents new arguments. */
320 char *new_str = malloc (top + 1);
321 if (new_str == NULL)
322 nonoption_flags_len = nonoption_flags_max_len = 0;
323 else
324 {
325 memcpy (new_str, __getopt_nonoption_flags, nonoption_flags_max_len);
326 memset (&new_str[nonoption_flags_max_len], '\0',
327 top + 1 - nonoption_flags_max_len);
328 nonoption_flags_max_len = top + 1;
329 __getopt_nonoption_flags = new_str;
330 }
331 }
332 #endif
333
334 while (top > middle && middle > bottom)
335 {
336 if (top - middle > middle - bottom)
337 {
338 /* Bottom segment is the short one. */
339 int len = middle - bottom;
340 register int i;
341
342 /* Swap it with the top part of the top segment. */
343 for (i = 0; i < len; i++)
344 {
345 tem = argv[bottom + i];
346 argv[bottom + i] = argv[top - (middle - bottom) + i];
347 argv[top - (middle - bottom) + i] = tem;
348 SWAP_FLAGS (bottom + i, top - (middle - bottom) + i);
349 }
350 /* Exclude the moved bottom segment from further swapping. */
351 top -= len;
352 }
353 else
354 {
355 /* Top segment is the short one. */
356 int len = top - middle;
357 register int i;
358
359 /* Swap it with the bottom part of the bottom segment. */
360 for (i = 0; i < len; i++)
361 {
362 tem = argv[bottom + i];
363 argv[bottom + i] = argv[middle + i];
364 argv[middle + i] = tem;
365 SWAP_FLAGS (bottom + i, middle + i);
366 }
367 /* Exclude the moved top segment from further swapping. */
368 bottom += len;
369 }
370 }
371
372 /* Update records for the slots the non-options now occupy. */
373
374 first_nonopt += (optind - last_nonopt);
375 last_nonopt = optind;
376 }
377
378 /* Initialize the internal data when the first call is made. */
379
380 #if defined (__STDC__) && __STDC__
381 static const char *_getopt_initialize (int, char *const *, const char *);
382 #endif
383 static const char *
384 _getopt_initialize (argc, argv, optstring)
385 int argc;
386 char *const *argv;
387 const char *optstring;
388 {
389 /* Start processing options with ARGV-element 1 (since ARGV-element 0
390 is the program name); the sequence of previously skipped
391 non-option ARGV-elements is empty. */
392
393 first_nonopt = last_nonopt = optind;
394
395 nextchar = NULL;
396
397 posixly_correct = getenv ("POSIXLY_CORRECT");
398
399 /* Determine how to handle the ordering of options and nonoptions. */
400
401 if (optstring[0] == '-')
402 {
403 ordering = RETURN_IN_ORDER;
404 ++optstring;
405 }
406 else if (optstring[0] == '+')
407 {
408 ordering = REQUIRE_ORDER;
409 ++optstring;
410 }
411 else if (posixly_correct != NULL)
412 ordering = REQUIRE_ORDER;
413 else
414 ordering = PERMUTE;
415
416 #ifdef _LIBC
417 if (posixly_correct == NULL
418 && argc == original_argc && argv == original_argv)
419 {
420 if (nonoption_flags_max_len == 0)
421 {
422 if (__getopt_nonoption_flags == NULL
423 || __getopt_nonoption_flags[0] == '\0')
424 nonoption_flags_max_len = -1;
425 else
426 {
427 const char *orig_str = __getopt_nonoption_flags;
428 int len = nonoption_flags_max_len = strlen (orig_str);
429 if (nonoption_flags_max_len < argc)
430 nonoption_flags_max_len = argc;
431 __getopt_nonoption_flags =
432 (char *) malloc (nonoption_flags_max_len);
433 if (__getopt_nonoption_flags == NULL)
434 nonoption_flags_max_len = -1;
435 else
436 {
437 memcpy (__getopt_nonoption_flags, orig_str, len);
438 memset (&__getopt_nonoption_flags[len], '\0',
439 nonoption_flags_max_len - len);
440 }
441 }
442 }
443 nonoption_flags_len = nonoption_flags_max_len;
444 }
445 else
446 nonoption_flags_len = 0;
447 #endif
448
449 return optstring;
450 }
451
452 /* Scan elements of ARGV (whose length is ARGC) for option characters
453 given in OPTSTRING.
454
455 If an element of ARGV starts with '-', and is not exactly "-" or "--",
456 then it is an option element. The characters of this element
457 (aside from the initial '-') are option characters. If `getopt'
458 is called repeatedly, it returns successively each of the option characters
459 from each of the option elements.
460
461 If `getopt' finds another option character, it returns that character,
462 updating `optind' and `nextchar' so that the next call to `getopt' can
463 resume the scan with the following option character or ARGV-element.
464
465 If there are no more option characters, `getopt' returns -1.
466 Then `optind' is the index in ARGV of the first ARGV-element
467 that is not an option. (The ARGV-elements have been permuted
468 so that those that are not options now come last.)
469
470 OPTSTRING is a string containing the legitimate option characters.
471 If an option character is seen that is not listed in OPTSTRING,
472 return '?' after printing an error message. If you set `opterr' to
473 zero, the error message is suppressed but we still return '?'.
474
475 If a char in OPTSTRING is followed by a colon, that means it wants an arg,
476 so the following text in the same ARGV-element, or the text of the following
477 ARGV-element, is returned in `optarg'. Two colons mean an option that
478 wants an optional arg; if there is text in the current ARGV-element,
479 it is returned in `optarg', otherwise `optarg' is set to zero.
480
481 If OPTSTRING starts with `-' or `+', it requests different methods of
482 handling the non-option ARGV-elements.
483 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
484
485 Long-named options begin with `--' instead of `-'.
486 Their names may be abbreviated as long as the abbreviation is unique
487 or is an exact match for some defined option. If they have an
488 argument, it follows the option name in the same ARGV-element, separated
489 from the option name by a `=', or else the in next ARGV-element.
490 When `getopt' finds a long-named option, it returns 0 if that option's
491 `flag' field is nonzero, the value of the option's `val' field
492 if the `flag' field is zero.
493
494 The elements of ARGV aren't really const, because we permute them.
495 But we pretend they're const in the prototype to be compatible
496 with other systems.
497
498 LONGOPTS is a vector of `struct option' terminated by an
499 element containing a name which is zero.
500
501 LONGIND returns the index in LONGOPT of the long-named option found.
502 It is only valid when a long-named option has been found by the most
503 recent call.
504
505 If LONG_ONLY is nonzero, '-' as well as '--' can introduce
506 long-named options. */
507
508 int
509 _getopt_internal (argc, argv, optstring, longopts, longind, long_only)
510 int argc;
511 char *const *argv;
512 const char *optstring;
513 const struct option *longopts;
514 int *longind;
515 int long_only;
516 {
517 optarg = NULL;
518
519 if (optind == 0 || !__getopt_initialized)
520 {
521 if (optind == 0)
522 optind = 1; /* Don't scan ARGV[0], the program name. */
523 optstring = _getopt_initialize (argc, argv, optstring);
524 __getopt_initialized = 1;
525 }
526
527 /* Test whether ARGV[optind] points to a non-option argument.
528 Either it does not have option syntax, or there is an environment flag
529 from the shell indicating it is not an option. The later information
530 is only used when the used in the GNU libc. */
531 #ifdef _LIBC
532 #define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \
533 || (optind < nonoption_flags_len \
534 && __getopt_nonoption_flags[optind] == '1'))
535 #else
536 #define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0')
537 #endif
538
539 if (nextchar == NULL || *nextchar == '\0')
540 {
541 /* Advance to the next ARGV-element. */
542
543 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been
544 moved back by the user (who may also have changed the arguments). */
545 if (last_nonopt > optind)
546 last_nonopt = optind;
547 if (first_nonopt > optind)
548 first_nonopt = optind;
549
550 if (ordering == PERMUTE)
551 {
552 /* If we have just processed some options following some non-options,
553 exchange them so that the options come first. */
554
555 if (first_nonopt != last_nonopt && last_nonopt != optind)
556 exchange ((char **) argv);
557 else if (last_nonopt != optind)
558 first_nonopt = optind;
559
560 /* Skip any additional non-options
561 and extend the range of non-options previously skipped. */
562
563 while (optind < argc && NONOPTION_P)
564 optind++;
565 last_nonopt = optind;
566 }
567
568 /* The special ARGV-element `--' means premature end of options.
569 Skip it like a null option,
570 then exchange with previous non-options as if it were an option,
571 then skip everything else like a non-option. */
572
573 if (optind != argc && !strcmp (argv[optind], "--"))
574 {
575 optind++;
576
577 if (first_nonopt != last_nonopt && last_nonopt != optind)
578 exchange ((char **) argv);
579 else if (first_nonopt == last_nonopt)
580 first_nonopt = optind;
581 last_nonopt = argc;
582
583 optind = argc;
584 }
585
586 /* If we have done all the ARGV-elements, stop the scan
587 and back over any non-options that we skipped and permuted. */
588
589 if (optind == argc)
590 {
591 /* Set the next-arg-index to point at the non-options
592 that we previously skipped, so the caller will digest them. */
593 if (first_nonopt != last_nonopt)
594 optind = first_nonopt;
595 return -1;
596 }
597
598 /* If we have come to a non-option and did not permute it,
599 either stop the scan or describe it to the caller and pass it by. */
600
601 if (NONOPTION_P)
602 {
603 if (ordering == REQUIRE_ORDER)
604 return -1;
605 optarg = argv[optind++];
606 return 1;
607 }
608
609 /* We have found another option-ARGV-element.
610 Skip the initial punctuation. */
611
612 nextchar = (argv[optind] + 1
613 + (longopts != NULL && argv[optind][1] == '-'));
614 }
615
616 /* Decode the current option-ARGV-element. */
617
618 /* Check whether the ARGV-element is a long option.
619
620 If long_only and the ARGV-element has the form "-f", where f is
621 a valid short option, don't consider it an abbreviated form of
622 a long option that starts with f. Otherwise there would be no
623 way to give the -f short option.
624
625 On the other hand, if there's a long option "fubar" and
626 the ARGV-element is "-fu", do consider that an abbreviation of
627 the long option, just like "--fu", and not "-f" with arg "u".
628
629 This distinction seems to be the most useful approach. */
630
631 if (longopts != NULL
632 && (argv[optind][1] == '-'
633 || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1])))))
634 {
635 char *nameend;
636 const struct option *p;
637 const struct option *pfound = NULL;
638 int exact = 0;
639 int ambig = 0;
640 int indfound = -1;
641 int option_index;
642
643 for (nameend = nextchar; *nameend && *nameend != '='; nameend++)
644 /* Do nothing. */ ;
645
646 /* Test all long options for either exact match
647 or abbreviated matches. */
648 for (p = longopts, option_index = 0; p->name; p++, option_index++)
649 if (!strncmp (p->name, nextchar, nameend - nextchar))
650 {
651 if ((unsigned int) (nameend - nextchar)
652 == (unsigned int) strlen (p->name))
653 {
654 /* Exact match found. */
655 pfound = p;
656 indfound = option_index;
657 exact = 1;
658 break;
659 }
660 else if (pfound == NULL)
661 {
662 /* First nonexact match found. */
663 pfound = p;
664 indfound = option_index;
665 }
666 else
667 /* Second or later nonexact match found. */
668 ambig = 1;
669 }
670
671 if (ambig && !exact)
672 {
673 if (opterr)
674 fprintf (stderr, _("%s: option `%s' is ambiguous\n"),
675 argv[0], argv[optind]);
676 nextchar += strlen (nextchar);
677 optind++;
678 optopt = 0;
679 return '?';
680 }
681
682 if (pfound != NULL)
683 {
684 option_index = indfound;
685 optind++;
686 if (*nameend)
687 {
688 /* Don't test has_arg with >, because some C compilers don't
689 allow it to be used on enums. */
690 if (pfound->has_arg)
691 optarg = nameend + 1;
692 else
693 {
694 if (opterr)
695 if (argv[optind - 1][1] == '-')
696 /* --option */
697 fprintf (stderr,
698 _("%s: option `--%s' doesn't allow an argument\n"),
699 argv[0], pfound->name);
700 else
701 /* +option or -option */
702 fprintf (stderr,
703 _("%s: option `%c%s' doesn't allow an argument\n"),
704 argv[0], argv[optind - 1][0], pfound->name);
705
706 nextchar += strlen (nextchar);
707
708 optopt = pfound->val;
709 return '?';
710 }
711 }
712 else if (pfound->has_arg == 1)
713 {
714 if (optind < argc)
715 optarg = argv[optind++];
716 else
717 {
718 if (opterr)
719 fprintf (stderr,
720 _("%s: option `%s' requires an argument\n"),
721 argv[0], argv[optind - 1]);
722 nextchar += strlen (nextchar);
723 optopt = pfound->val;
724 return optstring[0] == ':' ? ':' : '?';
725 }
726 }
727 nextchar += strlen (nextchar);
728 if (longind != NULL)
729 *longind = option_index;
730 if (pfound->flag)
731 {
732 *(pfound->flag) = pfound->val;
733 return 0;
734 }
735 return pfound->val;
736 }
737
738 /* Can't find it as a long option. If this is not getopt_long_only,
739 or the option starts with '--' or is not a valid short
740 option, then it's an error.
741 Otherwise interpret it as a short option. */
742 if (!long_only || argv[optind][1] == '-'
743 || my_index (optstring, *nextchar) == NULL)
744 {
745 if (opterr)
746 {
747 if (argv[optind][1] == '-')
748 /* --option */
749 fprintf (stderr, _("%s: unrecognized option `--%s'\n"),
750 argv[0], nextchar);
751 else
752 /* +option or -option */
753 fprintf (stderr, _("%s: unrecognized option `%c%s'\n"),
754 argv[0], argv[optind][0], nextchar);
755 }
756 nextchar = (char *) "";
757 optind++;
758 optopt = 0;
759 return '?';
760 }
761 }
762
763 /* Look at and handle the next short option-character. */
764
765 {
766 char c = *nextchar++;
767 char *temp = my_index (optstring, c);
768
769 /* Increment `optind' when we start to process its last character. */
770 if (*nextchar == '\0')
771 ++optind;
772
773 if (temp == NULL || c == ':')
774 {
775 if (opterr)
776 {
777 if (posixly_correct)
778 /* 1003.2 specifies the format of this message. */
779 fprintf (stderr, _("%s: illegal option -- %c\n"),
780 argv[0], c);
781 else
782 fprintf (stderr, _("%s: invalid option -- %c\n"),
783 argv[0], c);
784 }
785 optopt = c;
786 return '?';
787 }
788 /* Convenience. Treat POSIX -W foo same as long option --foo */
789 if (temp[0] == 'W' && temp[1] == ';')
790 {
791 char *nameend;
792 const struct option *p;
793 const struct option *pfound = NULL;
794 int exact = 0;
795 int ambig = 0;
796 int indfound = 0;
797 int option_index;
798
799 /* This is an option that requires an argument. */
800 if (*nextchar != '\0')
801 {
802 optarg = nextchar;
803 /* If we end this ARGV-element by taking the rest as an arg,
804 we must advance to the next element now. */
805 optind++;
806 }
807 else if (optind == argc)
808 {
809 if (opterr)
810 {
811 /* 1003.2 specifies the format of this message. */
812 fprintf (stderr, _("%s: option requires an argument -- %c\n"),
813 argv[0], c);
814 }
815 optopt = c;
816 if (optstring[0] == ':')
817 c = ':';
818 else
819 c = '?';
820 return c;
821 }
822 else
823 /* We already incremented `optind' once;
824 increment it again when taking next ARGV-elt as argument. */
825 optarg = argv[optind++];
826
827 /* optarg is now the argument, see if it's in the
828 table of longopts. */
829
830 for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++)
831 /* Do nothing. */ ;
832
833 /* Test all long options for either exact match
834 or abbreviated matches. */
835 for (p = longopts, option_index = 0; p->name; p++, option_index++)
836 if (!strncmp (p->name, nextchar, nameend - nextchar))
837 {
838 if ((unsigned int) (nameend - nextchar) == strlen (p->name))
839 {
840 /* Exact match found. */
841 pfound = p;
842 indfound = option_index;
843 exact = 1;
844 break;
845 }
846 else if (pfound == NULL)
847 {
848 /* First nonexact match found. */
849 pfound = p;
850 indfound = option_index;
851 }
852 else
853 /* Second or later nonexact match found. */
854 ambig = 1;
855 }
856 if (ambig && !exact)
857 {
858 if (opterr)
859 fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"),
860 argv[0], argv[optind]);
861 nextchar += strlen (nextchar);
862 optind++;
863 return '?';
864 }
865 if (pfound != NULL)
866 {
867 option_index = indfound;
868 if (*nameend)
869 {
870 /* Don't test has_arg with >, because some C compilers don't
871 allow it to be used on enums. */
872 if (pfound->has_arg)
873 optarg = nameend + 1;
874 else
875 {
876 if (opterr)
877 fprintf (stderr, _("\
878 %s: option `-W %s' doesn't allow an argument\n"),
879 argv[0], pfound->name);
880
881 nextchar += strlen (nextchar);
882 return '?';
883 }
884 }
885 else if (pfound->has_arg == 1)
886 {
887 if (optind < argc)
888 optarg = argv[optind++];
889 else
890 {
891 if (opterr)
892 fprintf (stderr,
893 _("%s: option `%s' requires an argument\n"),
894 argv[0], argv[optind - 1]);
895 nextchar += strlen (nextchar);
896 return optstring[0] == ':' ? ':' : '?';
897 }
898 }
899 nextchar += strlen (nextchar);
900 if (longind != NULL)
901 *longind = option_index;
902 if (pfound->flag)
903 {
904 *(pfound->flag) = pfound->val;
905 return 0;
906 }
907 return pfound->val;
908 }
909 nextchar = NULL;
910 return 'W'; /* Let the application handle it. */
911 }
912 if (temp[1] == ':')
913 {
914 if (temp[2] == ':')
915 {
916 /* This is an option that accepts an argument optionally. */
917 if (*nextchar != '\0')
918 {
919 optarg = nextchar;
920 optind++;
921 }
922 else
923 optarg = NULL;
924 nextchar = NULL;
925 }
926 else
927 {
928 /* This is an option that requires an argument. */
929 if (*nextchar != '\0')
930 {
931 optarg = nextchar;
932 /* If we end this ARGV-element by taking the rest as an arg,
933 we must advance to the next element now. */
934 optind++;
935 }
936 else if (optind == argc)
937 {
938 if (opterr)
939 {
940 /* 1003.2 specifies the format of this message. */
941 fprintf (stderr,
942 _("%s: option requires an argument -- %c\n"),
943 argv[0], c);
944 }
945 optopt = c;
946 if (optstring[0] == ':')
947 c = ':';
948 else
949 c = '?';
950 }
951 else
952 /* We already incremented `optind' once;
953 increment it again when taking next ARGV-elt as argument. */
954 optarg = argv[optind++];
955 nextchar = NULL;
956 }
957 }
958 return c;
959 }
960 }
961
962 int
963 getopt (argc, argv, optstring)
964 int argc;
965 char *const *argv;
966 const char *optstring;
967 {
968 return _getopt_internal (argc, argv, optstring,
969 (const struct option *) 0,
970 (int *) 0,
971 0);
972 }
973
974 #endif /* Not ELIDE_CODE. */
975
976 #ifdef TEST
977
978 /* Compile with -DTEST to make an executable for use in testing
979 the above definition of `getopt'. */
980
981 int
982 main (argc, argv)
983 int argc;
984 char **argv;
985 {
986 int c;
987 int digit_optind = 0;
988
989 while (1)
990 {
991 int this_option_optind = optind ? optind : 1;
992
993 c = getopt (argc, argv, "abc:d:0123456789");
994 if (c == -1)
995 break;
996
997 switch (c)
998 {
999 case '0':
1000 case '1':
1001 case '2':
1002 case '3':
1003 case '4':
1004 case '5':
1005 case '6':
1006 case '7':
1007 case '8':
1008 case '9':
1009 if (digit_optind != 0 && digit_optind != this_option_optind)
1010 printf ("digits occur in two different argv-elements.\n");
1011 digit_optind = this_option_optind;
1012 printf ("option %c\n", c);
1013 break;
1014
1015 case 'a':
1016 printf ("option a\n");
1017 break;
1018
1019 case 'b':
1020 printf ("option b\n");
1021 break;
1022
1023 case 'c':
1024 printf ("option c with value `%s'\n", optarg);
1025 break;
1026
1027 case '?':
1028 break;
1029
1030 default:
1031 printf ("?? getopt returned character code 0%o ??\n", c);
1032 }
1033 }
1034
1035 if (optind < argc)
1036 {
1037 printf ("non-option ARGV-elements: ");
1038 while (optind < argc)
1039 printf ("%s ", argv[optind++]);
1040 printf ("\n");
1041 }
1042
1043 exit (0);
1044 }
1045
1046 #endif /* TEST */