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) 1987-2020 Free Software Foundation, Inc.
7
8 NOTE: This source is derived from an old version taken from the GNU C
9 Library (glibc).
10
11 This program is free software; you can redistribute it and/or modify it
12 under the terms of the GNU General Public License as published by the
13 Free Software Foundation; either version 2, or (at your option) any
14 later version.
15
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
20
21 You should have received a copy of the GNU General Public License
22 along with this program; if not, write to the Free Software
23 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301,
24 USA. */
25
26 /* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>.
27 Ditto for AIX 3.2 and <stdlib.h>. */
28 #ifndef _NO_PROTO
29 # define _NO_PROTO
30 #endif
31
32 #ifdef HAVE_CONFIG_H
33 # include <config.h>
34 #endif
35
36 #if !defined __STDC__ || !__STDC__
37 /* This is a separate conditional since some stdc systems
38 reject `defined (const)'. */
39 # ifndef const
40 # define const
41 # endif
42 #endif
43
44 #include "ansidecl.h"
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 # if (HAVE_LIBINTL_H && ENABLE_NLS) || defined _LIBC
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 #if HAVE_STDLIB_H && HAVE_DECL_GETENV
216 # include <stdlib.h>
217 #elif !defined(getenv)
218 # ifdef __cplusplus
219 extern "C" {
220 # endif /* __cplusplus */
221 extern char *getenv (const char *);
222 # ifdef __cplusplus
223 }
224 # endif /* __cplusplus */
225 #endif
226
227 static char *
my_index(const char * str,int chr)228 my_index (const char *str, int chr)
229 {
230 while (*str)
231 {
232 if (*str == chr)
233 return (char *) str;
234 str++;
235 }
236 return 0;
237 }
238
239 /* If using GCC, we can safely declare strlen this way.
240 If not using GCC, it is ok not to declare it. */
241 #ifdef __GNUC__
242 /* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h.
243 That was relevant to code that was here before. */
244 # if (!defined __STDC__ || !__STDC__) && !defined strlen
245 /* gcc with -traditional declares the built-in strlen to return int,
246 and has done so at least since version 2.4.5. -- rms. */
247 extern int strlen (const char *);
248 # endif /* not __STDC__ */
249 #endif /* __GNUC__ */
250
251 #endif /* not __GNU_LIBRARY__ */
252
253 /* Handle permutation of arguments. */
254
255 /* Describe the part of ARGV that contains non-options that have
256 been skipped. `first_nonopt' is the index in ARGV of the first of them;
257 `last_nonopt' is the index after the last of them. */
258
259 static int first_nonopt;
260 static int last_nonopt;
261
262 #ifdef _LIBC
263 /* Bash 2.0 gives us an environment variable containing flags
264 indicating ARGV elements that should not be considered arguments. */
265
266 /* Defined in getopt_init.c */
267 extern char *__getopt_nonoption_flags;
268
269 static int nonoption_flags_max_len;
270 static int nonoption_flags_len;
271
272 static int original_argc;
273 static char *const *original_argv;
274
275 /* Make sure the environment variable bash 2.0 puts in the environment
276 is valid for the getopt call we must make sure that the ARGV passed
277 to getopt is that one passed to the process. */
278 static void
279 __attribute__ ((unused))
store_args_and_env(int argc,char * const * argv)280 store_args_and_env (int argc, char *const *argv)
281 {
282 /* XXX This is no good solution. We should rather copy the args so
283 that we can compare them later. But we must not use malloc(3). */
284 original_argc = argc;
285 original_argv = argv;
286 }
287 # ifdef text_set_element
288 text_set_element (__libc_subinit, store_args_and_env);
289 # endif /* text_set_element */
290
291 # define SWAP_FLAGS(ch1, ch2) \
292 if (nonoption_flags_len > 0) \
293 { \
294 char __tmp = __getopt_nonoption_flags[ch1]; \
295 __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \
296 __getopt_nonoption_flags[ch2] = __tmp; \
297 }
298 #else /* !_LIBC */
299 # define SWAP_FLAGS(ch1, ch2)
300 #endif /* _LIBC */
301
302 /* Exchange two adjacent subsequences of ARGV.
303 One subsequence is elements [first_nonopt,last_nonopt)
304 which contains all the non-options that have been skipped so far.
305 The other is elements [last_nonopt,optind), which contains all
306 the options processed since those non-options were skipped.
307
308 `first_nonopt' and `last_nonopt' are relocated so that they describe
309 the new indices of the non-options in ARGV after they are moved. */
310
311 #if defined __STDC__ && __STDC__
312 static void exchange (char **);
313 #endif
314
315 static void
exchange(char ** argv)316 exchange (char **argv)
317 {
318 int bottom = first_nonopt;
319 int middle = last_nonopt;
320 int top = optind;
321 char *tem;
322
323 /* Exchange the shorter segment with the far end of the longer segment.
324 That puts the shorter segment into the right place.
325 It leaves the longer segment in the right place overall,
326 but it consists of two parts that need to be swapped next. */
327
328 #ifdef _LIBC
329 /* First make sure the handling of the `__getopt_nonoption_flags'
330 string can work normally. Our top argument must be in the range
331 of the string. */
332 if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len)
333 {
334 /* We must extend the array. The user plays games with us and
335 presents new arguments. */
336 char *new_str = (char *) malloc (top + 1);
337 if (new_str == NULL)
338 nonoption_flags_len = nonoption_flags_max_len = 0;
339 else
340 {
341 memset (mempcpy (new_str, __getopt_nonoption_flags,
342 nonoption_flags_max_len),
343 '\0', top + 1 - nonoption_flags_max_len);
344 nonoption_flags_max_len = top + 1;
345 __getopt_nonoption_flags = new_str;
346 }
347 }
348 #endif
349
350 while (top > middle && middle > bottom)
351 {
352 if (top - middle > middle - bottom)
353 {
354 /* Bottom segment is the short one. */
355 int len = middle - bottom;
356 register int i;
357
358 /* Swap it with the top part of the top segment. */
359 for (i = 0; i < len; i++)
360 {
361 tem = argv[bottom + i];
362 argv[bottom + i] = argv[top - (middle - bottom) + i];
363 argv[top - (middle - bottom) + i] = tem;
364 SWAP_FLAGS (bottom + i, top - (middle - bottom) + i);
365 }
366 /* Exclude the moved bottom segment from further swapping. */
367 top -= len;
368 }
369 else
370 {
371 /* Top segment is the short one. */
372 int len = top - middle;
373 register int i;
374
375 /* Swap it with the bottom part of the bottom segment. */
376 for (i = 0; i < len; i++)
377 {
378 tem = argv[bottom + i];
379 argv[bottom + i] = argv[middle + i];
380 argv[middle + i] = tem;
381 SWAP_FLAGS (bottom + i, middle + i);
382 }
383 /* Exclude the moved top segment from further swapping. */
384 bottom += len;
385 }
386 }
387
388 /* Update records for the slots the non-options now occupy. */
389
390 first_nonopt += (optind - last_nonopt);
391 last_nonopt = optind;
392 }
393
394 /* Initialize the internal data when the first call is made. */
395
396 #if defined __STDC__ && __STDC__
397 static const char *_getopt_initialize (int, char *const *, const char *);
398 #endif
399 static const char *
_getopt_initialize(int argc ATTRIBUTE_UNUSED,char * const * argv ATTRIBUTE_UNUSED,const char * optstring)400 _getopt_initialize (int argc ATTRIBUTE_UNUSED,
401 char *const *argv ATTRIBUTE_UNUSED,
402 const char *optstring)
403 {
404 /* Start processing options with ARGV-element 1 (since ARGV-element 0
405 is the program name); the sequence of previously skipped
406 non-option ARGV-elements is empty. */
407
408 first_nonopt = last_nonopt = optind;
409
410 nextchar = NULL;
411
412 posixly_correct = getenv ("POSIXLY_CORRECT");
413
414 /* Determine how to handle the ordering of options and nonoptions. */
415
416 if (optstring[0] == '-')
417 {
418 ordering = RETURN_IN_ORDER;
419 ++optstring;
420 }
421 else if (optstring[0] == '+')
422 {
423 ordering = REQUIRE_ORDER;
424 ++optstring;
425 }
426 else if (posixly_correct != NULL)
427 ordering = REQUIRE_ORDER;
428 else
429 ordering = PERMUTE;
430
431 #ifdef _LIBC
432 if (posixly_correct == NULL
433 && argc == original_argc && argv == original_argv)
434 {
435 if (nonoption_flags_max_len == 0)
436 {
437 if (__getopt_nonoption_flags == NULL
438 || __getopt_nonoption_flags[0] == '\0')
439 nonoption_flags_max_len = -1;
440 else
441 {
442 const char *orig_str = __getopt_nonoption_flags;
443 int len = nonoption_flags_max_len = strlen (orig_str);
444 if (nonoption_flags_max_len < argc)
445 nonoption_flags_max_len = argc;
446 __getopt_nonoption_flags =
447 (char *) malloc (nonoption_flags_max_len);
448 if (__getopt_nonoption_flags == NULL)
449 nonoption_flags_max_len = -1;
450 else
451 memset (mempcpy (__getopt_nonoption_flags, orig_str, len),
452 '\0', nonoption_flags_max_len - len);
453 }
454 }
455 nonoption_flags_len = nonoption_flags_max_len;
456 }
457 else
458 nonoption_flags_len = 0;
459 #endif
460
461 return optstring;
462 }
463
464 /* Scan elements of ARGV (whose length is ARGC) for option characters
465 given in OPTSTRING.
466
467 If an element of ARGV starts with '-', and is not exactly "-" or "--",
468 then it is an option element. The characters of this element
469 (aside from the initial '-') are option characters. If `getopt'
470 is called repeatedly, it returns successively each of the option characters
471 from each of the option elements.
472
473 If `getopt' finds another option character, it returns that character,
474 updating `optind' and `nextchar' so that the next call to `getopt' can
475 resume the scan with the following option character or ARGV-element.
476
477 If there are no more option characters, `getopt' returns -1.
478 Then `optind' is the index in ARGV of the first ARGV-element
479 that is not an option. (The ARGV-elements have been permuted
480 so that those that are not options now come last.)
481
482 OPTSTRING is a string containing the legitimate option characters.
483 If an option character is seen that is not listed in OPTSTRING,
484 return '?' after printing an error message. If you set `opterr' to
485 zero, the error message is suppressed but we still return '?'.
486
487 If a char in OPTSTRING is followed by a colon, that means it wants an arg,
488 so the following text in the same ARGV-element, or the text of the following
489 ARGV-element, is returned in `optarg'. Two colons mean an option that
490 wants an optional arg; if there is text in the current ARGV-element,
491 it is returned in `optarg', otherwise `optarg' is set to zero.
492
493 If OPTSTRING starts with `-' or `+', it requests different methods of
494 handling the non-option ARGV-elements.
495 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
496
497 Long-named options begin with `--' instead of `-'.
498 Their names may be abbreviated as long as the abbreviation is unique
499 or is an exact match for some defined option. If they have an
500 argument, it follows the option name in the same ARGV-element, separated
501 from the option name by a `=', or else the in next ARGV-element.
502 When `getopt' finds a long-named option, it returns 0 if that option's
503 `flag' field is nonzero, the value of the option's `val' field
504 if the `flag' field is zero.
505
506 The elements of ARGV aren't really const, because we permute them.
507 But we pretend they're const in the prototype to be compatible
508 with other systems.
509
510 LONGOPTS is a vector of `struct option' terminated by an
511 element containing a name which is zero.
512
513 LONGIND returns the index in LONGOPT of the long-named option found.
514 It is only valid when a long-named option has been found by the most
515 recent call.
516
517 If LONG_ONLY is nonzero, '-' as well as '--' can introduce
518 long-named options. */
519
520 int
_getopt_internal(int argc,char * const * argv,const char * optstring,const struct option * longopts,int * longind,int long_only)521 _getopt_internal (int argc, char *const *argv, const char *optstring,
522 const struct option *longopts,
523 int *longind, int long_only)
524 {
525 optarg = NULL;
526
527 if (optind == 0 || !__getopt_initialized)
528 {
529 if (optind == 0)
530 optind = 1; /* Don't scan ARGV[0], the program name. */
531 optstring = _getopt_initialize (argc, argv, optstring);
532 __getopt_initialized = 1;
533 }
534
535 /* Test whether ARGV[optind] points to a non-option argument.
536 Either it does not have option syntax, or there is an environment flag
537 from the shell indicating it is not an option. The later information
538 is only used when the used in the GNU libc. */
539 #ifdef _LIBC
540 # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \
541 || (optind < nonoption_flags_len \
542 && __getopt_nonoption_flags[optind] == '1'))
543 #else
544 # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0')
545 #endif
546
547 if (nextchar == NULL || *nextchar == '\0')
548 {
549 /* Advance to the next ARGV-element. */
550
551 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been
552 moved back by the user (who may also have changed the arguments). */
553 if (last_nonopt > optind)
554 last_nonopt = optind;
555 if (first_nonopt > optind)
556 first_nonopt = optind;
557
558 if (ordering == PERMUTE)
559 {
560 /* If we have just processed some options following some non-options,
561 exchange them so that the options come first. */
562
563 if (first_nonopt != last_nonopt && last_nonopt != optind)
564 exchange ((char **) argv);
565 else if (last_nonopt != optind)
566 first_nonopt = optind;
567
568 /* Skip any additional non-options
569 and extend the range of non-options previously skipped. */
570
571 while (optind < argc && NONOPTION_P)
572 optind++;
573 last_nonopt = optind;
574 }
575
576 /* The special ARGV-element `--' means premature end of options.
577 Skip it like a null option,
578 then exchange with previous non-options as if it were an option,
579 then skip everything else like a non-option. */
580
581 if (optind != argc && !strcmp (argv[optind], "--"))
582 {
583 optind++;
584
585 if (first_nonopt != last_nonopt && last_nonopt != optind)
586 exchange ((char **) argv);
587 else if (first_nonopt == last_nonopt)
588 first_nonopt = optind;
589 last_nonopt = argc;
590
591 optind = argc;
592 }
593
594 /* If we have done all the ARGV-elements, stop the scan
595 and back over any non-options that we skipped and permuted. */
596
597 if (optind == argc)
598 {
599 /* Set the next-arg-index to point at the non-options
600 that we previously skipped, so the caller will digest them. */
601 if (first_nonopt != last_nonopt)
602 optind = first_nonopt;
603 return -1;
604 }
605
606 /* If we have come to a non-option and did not permute it,
607 either stop the scan or describe it to the caller and pass it by. */
608
609 if (NONOPTION_P)
610 {
611 if (ordering == REQUIRE_ORDER)
612 return -1;
613 optarg = argv[optind++];
614 return 1;
615 }
616
617 /* We have found another option-ARGV-element.
618 Skip the initial punctuation. */
619
620 nextchar = (argv[optind] + 1
621 + (longopts != NULL && argv[optind][1] == '-'));
622 }
623
624 /* Decode the current option-ARGV-element. */
625
626 /* Check whether the ARGV-element is a long option.
627
628 If long_only and the ARGV-element has the form "-f", where f is
629 a valid short option, don't consider it an abbreviated form of
630 a long option that starts with f. Otherwise there would be no
631 way to give the -f short option.
632
633 On the other hand, if there's a long option "fubar" and
634 the ARGV-element is "-fu", do consider that an abbreviation of
635 the long option, just like "--fu", and not "-f" with arg "u".
636
637 This distinction seems to be the most useful approach. */
638
639 if (longopts != NULL
640 && (argv[optind][1] == '-'
641 || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1])))))
642 {
643 char *nameend;
644 const struct option *p;
645 const struct option *pfound = NULL;
646 int exact = 0;
647 int ambig = 0;
648 int indfound = -1;
649 int option_index;
650
651 for (nameend = nextchar; *nameend && *nameend != '='; nameend++)
652 /* Do nothing. */ ;
653
654 /* Test all long options for either exact match
655 or abbreviated matches. */
656 for (p = longopts, option_index = 0; p->name; p++, option_index++)
657 if (!strncmp (p->name, nextchar, nameend - nextchar))
658 {
659 if ((unsigned int) (nameend - nextchar)
660 == (unsigned int) strlen (p->name))
661 {
662 /* Exact match found. */
663 pfound = p;
664 indfound = option_index;
665 exact = 1;
666 break;
667 }
668 else if (pfound == NULL)
669 {
670 /* First nonexact match found. */
671 pfound = p;
672 indfound = option_index;
673 }
674 else
675 /* Second or later nonexact match found. */
676 ambig = 1;
677 }
678
679 if (ambig && !exact)
680 {
681 if (opterr)
682 fprintf (stderr, _("%s: option `%s' is ambiguous\n"),
683 argv[0], argv[optind]);
684 nextchar += strlen (nextchar);
685 optind++;
686 optopt = 0;
687 return '?';
688 }
689
690 if (pfound != NULL)
691 {
692 option_index = indfound;
693 optind++;
694 if (*nameend)
695 {
696 /* Don't test has_arg with >, because some C compilers don't
697 allow it to be used on enums. */
698 if (pfound->has_arg)
699 optarg = nameend + 1;
700 else
701 {
702 if (opterr)
703 {
704 if (argv[optind - 1][1] == '-')
705 /* --option */
706 fprintf (stderr,
707 _("%s: option `--%s' doesn't allow an argument\n"),
708 argv[0], pfound->name);
709 else
710 /* +option or -option */
711 fprintf (stderr,
712 _("%s: option `%c%s' doesn't allow an argument\n"),
713 argv[0], argv[optind - 1][0], pfound->name);
714
715 nextchar += strlen (nextchar);
716
717 optopt = pfound->val;
718 return '?';
719 }
720 }
721 }
722 else if (pfound->has_arg == 1)
723 {
724 if (optind < argc)
725 optarg = argv[optind++];
726 else
727 {
728 if (opterr)
729 fprintf (stderr,
730 _("%s: option `%s' requires an argument\n"),
731 argv[0], argv[optind - 1]);
732 nextchar += strlen (nextchar);
733 optopt = pfound->val;
734 return optstring[0] == ':' ? ':' : '?';
735 }
736 }
737 nextchar += strlen (nextchar);
738 if (longind != NULL)
739 *longind = option_index;
740 if (pfound->flag)
741 {
742 *(pfound->flag) = pfound->val;
743 return 0;
744 }
745 return pfound->val;
746 }
747
748 /* Can't find it as a long option. If this is not getopt_long_only,
749 or the option starts with '--' or is not a valid short
750 option, then it's an error.
751 Otherwise interpret it as a short option. */
752 if (!long_only || argv[optind][1] == '-'
753 || my_index (optstring, *nextchar) == NULL)
754 {
755 if (opterr)
756 {
757 if (argv[optind][1] == '-')
758 /* --option */
759 fprintf (stderr, _("%s: unrecognized option `--%s'\n"),
760 argv[0], nextchar);
761 else
762 /* +option or -option */
763 fprintf (stderr, _("%s: unrecognized option `%c%s'\n"),
764 argv[0], argv[optind][0], nextchar);
765 }
766 nextchar = (char *) "";
767 optind++;
768 optopt = 0;
769 return '?';
770 }
771 }
772
773 /* Look at and handle the next short option-character. */
774
775 {
776 char c = *nextchar++;
777 char *temp = my_index (optstring, c);
778
779 /* Increment `optind' when we start to process its last character. */
780 if (*nextchar == '\0')
781 ++optind;
782
783 if (temp == NULL || c == ':')
784 {
785 if (opterr)
786 {
787 if (posixly_correct)
788 /* 1003.2 specifies the format of this message. */
789 fprintf (stderr, _("%s: illegal option -- %c\n"),
790 argv[0], c);
791 else
792 fprintf (stderr, _("%s: invalid option -- %c\n"),
793 argv[0], c);
794 }
795 optopt = c;
796 return '?';
797 }
798 /* Convenience. Treat POSIX -W foo same as long option --foo */
799 if (temp[0] == 'W' && temp[1] == ';')
800 {
801 char *nameend;
802 const struct option *p;
803 const struct option *pfound = NULL;
804 int exact = 0;
805 int ambig = 0;
806 int indfound = 0;
807 int option_index;
808
809 /* This is an option that requires an argument. */
810 if (*nextchar != '\0')
811 {
812 optarg = nextchar;
813 /* If we end this ARGV-element by taking the rest as an arg,
814 we must advance to the next element now. */
815 optind++;
816 }
817 else if (optind == argc)
818 {
819 if (opterr)
820 {
821 /* 1003.2 specifies the format of this message. */
822 fprintf (stderr, _("%s: option requires an argument -- %c\n"),
823 argv[0], c);
824 }
825 optopt = c;
826 if (optstring[0] == ':')
827 c = ':';
828 else
829 c = '?';
830 return c;
831 }
832 else
833 /* We already incremented `optind' once;
834 increment it again when taking next ARGV-elt as argument. */
835 optarg = argv[optind++];
836
837 /* optarg is now the argument, see if it's in the
838 table of longopts. */
839
840 for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++)
841 /* Do nothing. */ ;
842
843 /* Test all long options for either exact match
844 or abbreviated matches. */
845 for (p = longopts, option_index = 0; p->name; p++, option_index++)
846 if (!strncmp (p->name, nextchar, nameend - nextchar))
847 {
848 if ((unsigned int) (nameend - nextchar) == strlen (p->name))
849 {
850 /* Exact match found. */
851 pfound = p;
852 indfound = option_index;
853 exact = 1;
854 break;
855 }
856 else if (pfound == NULL)
857 {
858 /* First nonexact match found. */
859 pfound = p;
860 indfound = option_index;
861 }
862 else
863 /* Second or later nonexact match found. */
864 ambig = 1;
865 }
866 if (ambig && !exact)
867 {
868 if (opterr)
869 fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"),
870 argv[0], argv[optind]);
871 nextchar += strlen (nextchar);
872 optind++;
873 return '?';
874 }
875 if (pfound != NULL)
876 {
877 option_index = indfound;
878 if (*nameend)
879 {
880 /* Don't test has_arg with >, because some C compilers don't
881 allow it to be used on enums. */
882 if (pfound->has_arg)
883 optarg = nameend + 1;
884 else
885 {
886 if (opterr)
887 fprintf (stderr, _("\
888 %s: option `-W %s' doesn't allow an argument\n"),
889 argv[0], pfound->name);
890
891 nextchar += strlen (nextchar);
892 return '?';
893 }
894 }
895 else if (pfound->has_arg == 1)
896 {
897 if (optind < argc)
898 optarg = argv[optind++];
899 else
900 {
901 if (opterr)
902 fprintf (stderr,
903 _("%s: option `%s' requires an argument\n"),
904 argv[0], argv[optind - 1]);
905 nextchar += strlen (nextchar);
906 return optstring[0] == ':' ? ':' : '?';
907 }
908 }
909 nextchar += strlen (nextchar);
910 if (longind != NULL)
911 *longind = option_index;
912 if (pfound->flag)
913 {
914 *(pfound->flag) = pfound->val;
915 return 0;
916 }
917 return pfound->val;
918 }
919 nextchar = NULL;
920 return 'W'; /* Let the application handle it. */
921 }
922 if (temp[1] == ':')
923 {
924 if (temp[2] == ':')
925 {
926 /* This is an option that accepts an argument optionally. */
927 if (*nextchar != '\0')
928 {
929 optarg = nextchar;
930 optind++;
931 }
932 else
933 optarg = NULL;
934 nextchar = NULL;
935 }
936 else
937 {
938 /* This is an option that requires an argument. */
939 if (*nextchar != '\0')
940 {
941 optarg = nextchar;
942 /* If we end this ARGV-element by taking the rest as an arg,
943 we must advance to the next element now. */
944 optind++;
945 }
946 else if (optind == argc)
947 {
948 if (opterr)
949 {
950 /* 1003.2 specifies the format of this message. */
951 fprintf (stderr,
952 _("%s: option requires an argument -- %c\n"),
953 argv[0], c);
954 }
955 optopt = c;
956 if (optstring[0] == ':')
957 c = ':';
958 else
959 c = '?';
960 }
961 else
962 /* We already incremented `optind' once;
963 increment it again when taking next ARGV-elt as argument. */
964 optarg = argv[optind++];
965 nextchar = NULL;
966 }
967 }
968 return c;
969 }
970 }
971
972 int
getopt(int argc,char * const * argv,const char * optstring)973 getopt (int argc, char *const *argv, 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
main(int argc,char ** argv)989 main (int argc, char **argv)
990 {
991 int c;
992 int digit_optind = 0;
993
994 while (1)
995 {
996 int this_option_optind = optind ? optind : 1;
997
998 c = getopt (argc, argv, "abc:d:0123456789");
999 if (c == -1)
1000 break;
1001
1002 switch (c)
1003 {
1004 case '0':
1005 case '1':
1006 case '2':
1007 case '3':
1008 case '4':
1009 case '5':
1010 case '6':
1011 case '7':
1012 case '8':
1013 case '9':
1014 if (digit_optind != 0 && digit_optind != this_option_optind)
1015 printf ("digits occur in two different argv-elements.\n");
1016 digit_optind = this_option_optind;
1017 printf ("option %c\n", c);
1018 break;
1019
1020 case 'a':
1021 printf ("option a\n");
1022 break;
1023
1024 case 'b':
1025 printf ("option b\n");
1026 break;
1027
1028 case 'c':
1029 printf ("option c with value `%s'\n", optarg);
1030 break;
1031
1032 case '?':
1033 break;
1034
1035 default:
1036 printf ("?? getopt returned character code 0%o ??\n", c);
1037 }
1038 }
1039
1040 if (optind < argc)
1041 {
1042 printf ("non-option ARGV-elements: ");
1043 while (optind < argc)
1044 printf ("%s ", argv[optind++]);
1045 printf ("\n");
1046 }
1047
1048 exit (0);
1049 }
1050
1051 #endif /* TEST */
1052