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