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