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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 bug-glibc@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 #if defined (WINDOWS32) && !defined (__CYGWIN32__)
83 /* It's not Unix, really. See? Capital letters. */
84 #include <windows.h>
85 #define getpid() GetCurrentProcessId()
86 #endif
87
88 #ifndef _
89 /* This is for other GNU distributions with internationalized messages.
90 When compiling libc, the _ macro is predefined. */
91 #ifdef HAVE_LIBINTL_H
92 # include <libintl.h>
93 # define _(msgid) gettext (msgid)
94 #else
95 # define _(msgid) (msgid)
96 #endif
97 #endif
98
99 /* This version of `getopt' appears to the caller like standard Unix `getopt'
100 but it behaves differently for the user, since it allows the user
101 to intersperse the options with the other arguments.
102
103 As `getopt' works, it permutes the elements of ARGV so that,
104 when it is done, all the options precede everything else. Thus
105 all application programs are extended to handle flexible argument order.
106
107 Setting the environment variable POSIXLY_CORRECT disables permutation.
108 Then the behavior is completely standard.
109
110 GNU application programs can use a third alternative mode in which
111 they can distinguish the relative order of options and other arguments. */
112
113 #include "getopt.h"
114
115 /* For communication from `getopt' to the caller.
116 When `getopt' finds an option that takes an argument,
117 the argument value is returned here.
118 Also, when `ordering' is RETURN_IN_ORDER,
119 each non-option ARGV-element is returned here. */
120
121 char *optarg = NULL;
122
123 /* Index in ARGV of the next element to be scanned.
124 This is used for communication to and from the caller
125 and for communication between successive calls to `getopt'.
126
127 On entry to `getopt', zero means this is the first call; initialize.
128
129 When `getopt' returns -1, this is the index of the first of the
130 non-option elements that the caller should itself scan.
131
132 Otherwise, `optind' communicates from one call to the next
133 how much of ARGV has been scanned so far. */
134
135 /* 1003.2 says this must be 1 before any call. */
136 int optind = 1;
137
138 /* Formerly, initialization of getopt depended on optind==0, which
139 causes problems with re-calling getopt as programs generally don't
140 know that. */
141
142 int __getopt_initialized = 0;
143
144 /* The next char to be scanned in the option-element
145 in which the last option character we returned was found.
146 This allows us to pick up the scan where we left off.
147
148 If this is zero, or a null string, it means resume the scan
149 by advancing to the next ARGV-element. */
150
151 static char *nextchar;
152
153 /* Callers store zero here to inhibit the error message
154 for unrecognized options. */
155
156 int opterr = 1;
157
158 /* Set to an option character which was unrecognized.
159 This must be initialized on some systems to avoid linking in the
160 system's own getopt implementation. */
161
162 int optopt = '?';
163
164 /* Describe how to deal with options that follow non-option ARGV-elements.
165
166 If the caller did not specify anything,
167 the default is REQUIRE_ORDER if the environment variable
168 POSIXLY_CORRECT is defined, PERMUTE otherwise.
169
170 REQUIRE_ORDER means don't recognize them as options;
171 stop option processing when the first non-option is seen.
172 This is what Unix does.
173 This mode of operation is selected by either setting the environment
174 variable POSIXLY_CORRECT, or using `+' as the first character
175 of the list of option characters.
176
177 PERMUTE is the default. We permute the contents of ARGV as we scan,
178 so that eventually all the non-options are at the end. This allows options
179 to be given in any order, even with programs that were not written to
180 expect this.
181
182 RETURN_IN_ORDER is an option available to programs that were written
183 to expect options and other ARGV-elements in any order and that care about
184 the ordering of the two. We describe each non-option ARGV-element
185 as if it were the argument of an option with character code 1.
186 Using `-' as the first character of the list of option characters
187 selects this mode of operation.
188
189 The special argument `--' forces an end of option-scanning regardless
190 of the value of `ordering'. In the case of RETURN_IN_ORDER, only
191 `--' can cause `getopt' to return -1 with `optind' != ARGC. */
192
193 static enum
194 {
195 REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
196 } ordering;
197
198 /* Value of POSIXLY_CORRECT environment variable. */
199 static char *posixly_correct;
200
201 #ifdef __GNU_LIBRARY__
202 /* We want to avoid inclusion of string.h with non-GNU libraries
203 because there are many ways it can cause trouble.
204 On some systems, it contains special magic macros that don't work
205 in GCC. */
206 #include <string.h>
207 #define my_index strchr
208 #else
209
210 /* Avoid depending on library functions or files
211 whose names are inconsistent. */
212
213 char *getenv ();
214
215 static char *
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__
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 extern pid_t __libc_pid;
266
267 /* Make sure the environment variable bash 2.0 puts in the environment
268 is valid for the getopt call we must make sure that the ARGV passed
269 to getopt is that one passed to the process. */
270 static void
271 __attribute__ ((unused))
272 store_args_and_env (int argc, char *const *argv)
273 {
274 /* XXX This is no good solution. We should rather copy the args so
275 that we can compare them later. But we must not use malloc(3). */
276 original_argc = argc;
277 original_argv = argv;
278 }
279 text_set_element (__libc_subinit, store_args_and_env);
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
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 memcpy (new_str, __getopt_nonoption_flags, nonoption_flags_max_len);
333 memset (&new_str[nonoption_flags_max_len], '\0',
334 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 *
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 {
444 memcpy (__getopt_nonoption_flags, orig_str, len);
445 memset (&__getopt_nonoption_flags[len], '\0',
446 nonoption_flags_max_len - len);
447 }
448 }
449 }
450 nonoption_flags_len = nonoption_flags_max_len;
451 }
452 else
453 nonoption_flags_len = 0;
454 #endif
455
456 return optstring;
457 }
458
459 /* Scan elements of ARGV (whose length is ARGC) for option characters
460 given in OPTSTRING.
461
462 If an element of ARGV starts with '-', and is not exactly "-" or "--",
463 then it is an option element. The characters of this element
464 (aside from the initial '-') are option characters. If `getopt'
465 is called repeatedly, it returns successively each of the option characters
466 from each of the option elements.
467
468 If `getopt' finds another option character, it returns that character,
469 updating `optind' and `nextchar' so that the next call to `getopt' can
470 resume the scan with the following option character or ARGV-element.
471
472 If there are no more option characters, `getopt' returns -1.
473 Then `optind' is the index in ARGV of the first ARGV-element
474 that is not an option. (The ARGV-elements have been permuted
475 so that those that are not options now come last.)
476
477 OPTSTRING is a string containing the legitimate option characters.
478 If an option character is seen that is not listed in OPTSTRING,
479 return '?' after printing an error message. If you set `opterr' to
480 zero, the error message is suppressed but we still return '?'.
481
482 If a char in OPTSTRING is followed by a colon, that means it wants an arg,
483 so the following text in the same ARGV-element, or the text of the following
484 ARGV-element, is returned in `optarg'. Two colons mean an option that
485 wants an optional arg; if there is text in the current ARGV-element,
486 it is returned in `optarg', otherwise `optarg' is set to zero.
487
488 If OPTSTRING starts with `-' or `+', it requests different methods of
489 handling the non-option ARGV-elements.
490 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
491
492 Long-named options begin with `--' instead of `-'.
493 Their names may be abbreviated as long as the abbreviation is unique
494 or is an exact match for some defined option. If they have an
495 argument, it follows the option name in the same ARGV-element, separated
496 from the option name by a `=', or else the in next ARGV-element.
497 When `getopt' finds a long-named option, it returns 0 if that option's
498 `flag' field is nonzero, the value of the option's `val' field
499 if the `flag' field is zero.
500
501 The elements of ARGV aren't really const, because we permute them.
502 But we pretend they're const in the prototype to be compatible
503 with other systems.
504
505 LONGOPTS is a vector of `struct option' terminated by an
506 element containing a name which is zero.
507
508 LONGIND returns the index in LONGOPT of the long-named option found.
509 It is only valid when a long-named option has been found by the most
510 recent call.
511
512 If LONG_ONLY is nonzero, '-' as well as '--' can introduce
513 long-named options. */
514
515 int
516 _getopt_internal (argc, argv, optstring, longopts, longind, long_only)
517 int argc;
518 char *const *argv;
519 const char *optstring;
520 const struct option *longopts;
521 int *longind;
522 int long_only;
523 {
524 optarg = NULL;
525
526 if (optind == 0 || !__getopt_initialized)
527 {
528 if (optind == 0)
529 optind = 1; /* Don't scan ARGV[0], the program name. */
530 optstring = _getopt_initialize (argc, argv, optstring);
531 __getopt_initialized = 1;
532 }
533
534 /* Test whether ARGV[optind] points to a non-option argument.
535 Either it does not have option syntax, or there is an environment flag
536 from the shell indicating it is not an option. The later information
537 is only used when the used in the GNU libc. */
538 #ifdef _LIBC
539 #define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \
540 || (optind < nonoption_flags_len \
541 && __getopt_nonoption_flags[optind] == '1'))
542 #else
543 #define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0')
544 #endif
545
546 if (nextchar == NULL || *nextchar == '\0')
547 {
548 /* Advance to the next ARGV-element. */
549
550 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been
551 moved back by the user (who may also have changed the arguments). */
552 if (last_nonopt > optind)
553 last_nonopt = optind;
554 if (first_nonopt > optind)
555 first_nonopt = optind;
556
557 if (ordering == PERMUTE)
558 {
559 /* If we have just processed some options following some non-options,
560 exchange them so that the options come first. */
561
562 if (first_nonopt != last_nonopt && last_nonopt != optind)
563 exchange ((char **) argv);
564 else if (last_nonopt != optind)
565 first_nonopt = optind;
566
567 /* Skip any additional non-options
568 and extend the range of non-options previously skipped. */
569
570 while (optind < argc && NONOPTION_P)
571 optind++;
572 last_nonopt = optind;
573 }
574
575 /* The special ARGV-element `--' means premature end of options.
576 Skip it like a null option,
577 then exchange with previous non-options as if it were an option,
578 then skip everything else like a non-option. */
579
580 if (optind != argc && !strcmp (argv[optind], "--"))
581 {
582 optind++;
583
584 if (first_nonopt != last_nonopt && last_nonopt != optind)
585 exchange ((char **) argv);
586 else if (first_nonopt == last_nonopt)
587 first_nonopt = optind;
588 last_nonopt = argc;
589
590 optind = argc;
591 }
592
593 /* If we have done all the ARGV-elements, stop the scan
594 and back over any non-options that we skipped and permuted. */
595
596 if (optind == argc)
597 {
598 /* Set the next-arg-index to point at the non-options
599 that we previously skipped, so the caller will digest them. */
600 if (first_nonopt != last_nonopt)
601 optind = first_nonopt;
602 return -1;
603 }
604
605 /* If we have come to a non-option and did not permute it,
606 either stop the scan or describe it to the caller and pass it by. */
607
608 if (NONOPTION_P)
609 {
610 if (ordering == REQUIRE_ORDER)
611 return -1;
612 optarg = argv[optind++];
613 return 1;
614 }
615
616 /* We have found another option-ARGV-element.
617 Skip the initial punctuation. */
618
619 nextchar = (argv[optind] + 1
620 + (longopts != NULL && argv[optind][1] == '-'));
621 }
622
623 /* Decode the current option-ARGV-element. */
624
625 /* Check whether the ARGV-element is a long option.
626
627 If long_only and the ARGV-element has the form "-f", where f is
628 a valid short option, don't consider it an abbreviated form of
629 a long option that starts with f. Otherwise there would be no
630 way to give the -f short option.
631
632 On the other hand, if there's a long option "fubar" and
633 the ARGV-element is "-fu", do consider that an abbreviation of
634 the long option, just like "--fu", and not "-f" with arg "u".
635
636 This distinction seems to be the most useful approach. */
637
638 if (longopts != NULL
639 && (argv[optind][1] == '-'
640 || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1])))))
641 {
642 char *nameend;
643 const struct option *p;
644 const struct option *pfound = NULL;
645 int exact = 0;
646 int ambig = 0;
647 int indfound = -1;
648 int option_index;
649
650 for (nameend = nextchar; *nameend && *nameend != '='; nameend++)
651 /* Do nothing. */ ;
652
653 /* Test all long options for either exact match
654 or abbreviated matches. */
655 for (p = longopts, option_index = 0; p->name; p++, option_index++)
656 if (!strncmp (p->name, nextchar, nameend - nextchar))
657 {
658 if ((unsigned int) (nameend - nextchar)
659 == (unsigned int) strlen (p->name))
660 {
661 /* Exact match found. */
662 pfound = p;
663 indfound = option_index;
664 exact = 1;
665 break;
666 }
667 else if (pfound == NULL)
668 {
669 /* First nonexact match found. */
670 pfound = p;
671 indfound = option_index;
672 }
673 else
674 /* Second or later nonexact match found. */
675 ambig = 1;
676 }
677
678 if (ambig && !exact)
679 {
680 if (opterr)
681 fprintf (stderr, _("%s: option `%s' is ambiguous\n"),
682 argv[0], argv[optind]);
683 nextchar += strlen (nextchar);
684 optind++;
685 optopt = 0;
686 return '?';
687 }
688
689 if (pfound != NULL)
690 {
691 option_index = indfound;
692 optind++;
693 if (*nameend)
694 {
695 /* Don't test has_arg with >, because some C compilers don't
696 allow it to be used on enums. */
697 if (pfound->has_arg)
698 optarg = nameend + 1;
699 else
700 {
701 if (opterr)
702 if (argv[optind - 1][1] == '-')
703 /* --option */
704 fprintf (stderr,
705 _("%s: option `--%s' doesn't allow an argument\n"),
706 argv[0], pfound->name);
707 else
708 /* +option or -option */
709 fprintf (stderr,
710 _("%s: option `%c%s' doesn't allow an argument\n"),
711 argv[0], argv[optind - 1][0], pfound->name);
712
713 nextchar += strlen (nextchar);
714
715 optopt = pfound->val;
716 return '?';
717 }
718 }
719 else if (pfound->has_arg == 1)
720 {
721 if (optind < argc)
722 optarg = argv[optind++];
723 else
724 {
725 if (opterr)
726 fprintf (stderr,
727 _("%s: option `%s' requires an argument\n"),
728 argv[0], argv[optind - 1]);
729 nextchar += strlen (nextchar);
730 optopt = pfound->val;
731 return optstring[0] == ':' ? ':' : '?';
732 }
733 }
734 nextchar += strlen (nextchar);
735 if (longind != NULL)
736 *longind = option_index;
737 if (pfound->flag)
738 {
739 *(pfound->flag) = pfound->val;
740 return 0;
741 }
742 return pfound->val;
743 }
744
745 /* Can't find it as a long option. If this is not getopt_long_only,
746 or the option starts with '--' or is not a valid short
747 option, then it's an error.
748 Otherwise interpret it as a short option. */
749 if (!long_only || argv[optind][1] == '-'
750 || my_index (optstring, *nextchar) == NULL)
751 {
752 if (opterr)
753 {
754 if (argv[optind][1] == '-')
755 /* --option */
756 fprintf (stderr, _("%s: unrecognized option `--%s'\n"),
757 argv[0], nextchar);
758 else
759 /* +option or -option */
760 fprintf (stderr, _("%s: unrecognized option `%c%s'\n"),
761 argv[0], argv[optind][0], nextchar);
762 }
763 nextchar = (char *) "";
764 optind++;
765 optopt = 0;
766 return '?';
767 }
768 }
769
770 /* Look at and handle the next short option-character. */
771
772 {
773 char c = *nextchar++;
774 char *temp = my_index (optstring, c);
775
776 /* Increment `optind' when we start to process its last character. */
777 if (*nextchar == '\0')
778 ++optind;
779
780 if (temp == NULL || c == ':')
781 {
782 if (opterr)
783 {
784 if (posixly_correct)
785 /* 1003.2 specifies the format of this message. */
786 fprintf (stderr, _("%s: illegal option -- %c\n"),
787 argv[0], c);
788 else
789 fprintf (stderr, _("%s: invalid option -- %c\n"),
790 argv[0], c);
791 }
792 optopt = c;
793 return '?';
794 }
795 /* Convenience. Treat POSIX -W foo same as long option --foo */
796 if (temp[0] == 'W' && temp[1] == ';')
797 {
798 char *nameend;
799 const struct option *p;
800 const struct option *pfound = NULL;
801 int exact = 0;
802 int ambig = 0;
803 int indfound = 0;
804 int option_index;
805
806 /* This is an option that requires an argument. */
807 if (*nextchar != '\0')
808 {
809 optarg = nextchar;
810 /* If we end this ARGV-element by taking the rest as an arg,
811 we must advance to the next element now. */
812 optind++;
813 }
814 else if (optind == argc)
815 {
816 if (opterr)
817 {
818 /* 1003.2 specifies the format of this message. */
819 fprintf (stderr, _("%s: option requires an argument -- %c\n"),
820 argv[0], c);
821 }
822 optopt = c;
823 if (optstring[0] == ':')
824 c = ':';
825 else
826 c = '?';
827 return c;
828 }
829 else
830 /* We already incremented `optind' once;
831 increment it again when taking next ARGV-elt as argument. */
832 optarg = argv[optind++];
833
834 /* optarg is now the argument, see if it's in the
835 table of longopts. */
836
837 for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++)
838 /* Do nothing. */ ;
839
840 /* Test all long options for either exact match
841 or abbreviated matches. */
842 for (p = longopts, option_index = 0; p->name; p++, option_index++)
843 if (!strncmp (p->name, nextchar, nameend - nextchar))
844 {
845 if ((unsigned int) (nameend - nextchar) == strlen (p->name))
846 {
847 /* Exact match found. */
848 pfound = p;
849 indfound = option_index;
850 exact = 1;
851 break;
852 }
853 else if (pfound == NULL)
854 {
855 /* First nonexact match found. */
856 pfound = p;
857 indfound = option_index;
858 }
859 else
860 /* Second or later nonexact match found. */
861 ambig = 1;
862 }
863 if (ambig && !exact)
864 {
865 if (opterr)
866 fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"),
867 argv[0], argv[optind]);
868 nextchar += strlen (nextchar);
869 optind++;
870 return '?';
871 }
872 if (pfound != NULL)
873 {
874 option_index = indfound;
875 if (*nameend)
876 {
877 /* Don't test has_arg with >, because some C compilers don't
878 allow it to be used on enums. */
879 if (pfound->has_arg)
880 optarg = nameend + 1;
881 else
882 {
883 if (opterr)
884 fprintf (stderr, _("\
885 %s: option `-W %s' doesn't allow an argument\n"),
886 argv[0], pfound->name);
887
888 nextchar += strlen (nextchar);
889 return '?';
890 }
891 }
892 else if (pfound->has_arg == 1)
893 {
894 if (optind < argc)
895 optarg = argv[optind++];
896 else
897 {
898 if (opterr)
899 fprintf (stderr,
900 _("%s: option `%s' requires an argument\n"),
901 argv[0], argv[optind - 1]);
902 nextchar += strlen (nextchar);
903 return optstring[0] == ':' ? ':' : '?';
904 }
905 }
906 nextchar += strlen (nextchar);
907 if (longind != NULL)
908 *longind = option_index;
909 if (pfound->flag)
910 {
911 *(pfound->flag) = pfound->val;
912 return 0;
913 }
914 return pfound->val;
915 }
916 nextchar = NULL;
917 return 'W'; /* Let the application handle it. */
918 }
919 if (temp[1] == ':')
920 {
921 if (temp[2] == ':')
922 {
923 /* This is an option that accepts an argument optionally. */
924 if (*nextchar != '\0')
925 {
926 optarg = nextchar;
927 optind++;
928 }
929 else
930 optarg = NULL;
931 nextchar = NULL;
932 }
933 else
934 {
935 /* This is an option that requires an argument. */
936 if (*nextchar != '\0')
937 {
938 optarg = nextchar;
939 /* If we end this ARGV-element by taking the rest as an arg,
940 we must advance to the next element now. */
941 optind++;
942 }
943 else if (optind == argc)
944 {
945 if (opterr)
946 {
947 /* 1003.2 specifies the format of this message. */
948 fprintf (stderr,
949 _("%s: option requires an argument -- %c\n"),
950 argv[0], c);
951 }
952 optopt = c;
953 if (optstring[0] == ':')
954 c = ':';
955 else
956 c = '?';
957 }
958 else
959 /* We already incremented `optind' once;
960 increment it again when taking next ARGV-elt as argument. */
961 optarg = argv[optind++];
962 nextchar = NULL;
963 }
964 }
965 return c;
966 }
967 }
968
969 int
970 getopt (argc, argv, optstring)
971 int argc;
972 char *const *argv;
973 const char *optstring;
974 {
975 return _getopt_internal (argc, argv, optstring,
976 (const struct option *) 0,
977 (int *) 0,
978 0);
979 }
980
981 #endif /* Not ELIDE_CODE. */
982
983 #ifdef TEST
984
985 /* Compile with -DTEST to make an executable for use in testing
986 the above definition of `getopt'. */
987
988 int
989 main (argc, argv)
990 int argc;
991 char **argv;
992 {
993 int c;
994 int digit_optind = 0;
995
996 while (1)
997 {
998 int this_option_optind = optind ? optind : 1;
999
1000 c = getopt (argc, argv, "abc:d:0123456789");
1001 if (c == -1)
1002 break;
1003
1004 switch (c)
1005 {
1006 case '0':
1007 case '1':
1008 case '2':
1009 case '3':
1010 case '4':
1011 case '5':
1012 case '6':
1013 case '7':
1014 case '8':
1015 case '9':
1016 if (digit_optind != 0 && digit_optind != this_option_optind)
1017 printf ("digits occur in two different argv-elements.\n");
1018 digit_optind = this_option_optind;
1019 printf ("option %c\n", c);
1020 break;
1021
1022 case 'a':
1023 printf ("option a\n");
1024 break;
1025
1026 case 'b':
1027 printf ("option b\n");
1028 break;
1029
1030 case 'c':
1031 printf ("option c with value `%s'\n", optarg);
1032 break;
1033
1034 case '?':
1035 break;
1036
1037 default:
1038 printf ("?? getopt returned character code 0%o ??\n", c);
1039 }
1040 }
1041
1042 if (optind < argc)
1043 {
1044 printf ("non-option ARGV-elements: ");
1045 while (optind < argc)
1046 printf ("%s ", argv[optind++]);
1047 printf ("\n");
1048 }
1049
1050 exit (0);
1051 }
1052
1053 #endif /* TEST */