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