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1 office 1 /* Getopt for GNU.
2 NOTE: getopt is 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 Copyright (C) 1987-1996, 1998-2004, 2006, 2008-2016 Free Software
6 Foundation, Inc.
7 This file is part of the GNU C Library.
8  
9 This program is free software: you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13  
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18  
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21  
22 #ifndef _LIBC
23 # include <config.h>
24 #endif
25  
26 #include "getopt.h"
27  
28 #include <stdio.h>
29 #include <stdlib.h>
30 #include <string.h>
31 #include <unistd.h>
32  
33 #ifdef _LIBC
34 # include <libintl.h>
35 #else
36 # include "gettext.h"
37 # define _(msgid) gettext (msgid)
38 #endif
39  
40 #if defined _LIBC && defined USE_IN_LIBIO
41 # include <wchar.h>
42 #endif
43  
44 /* This version of 'getopt' appears to the caller like standard Unix 'getopt'
45 but it behaves differently for the user, since it allows the user
46 to intersperse the options with the other arguments.
47  
48 As 'getopt_long' works, it permutes the elements of ARGV so that,
49 when it is done, all the options precede everything else. Thus
50 all application programs are extended to handle flexible argument order.
51  
52 Using 'getopt' or setting the environment variable POSIXLY_CORRECT
53 disables permutation.
54 Then the behavior is completely standard.
55  
56 GNU application programs can use a third alternative mode in which
57 they can distinguish the relative order of options and other arguments. */
58  
59 #include "getopt_int.h"
60  
61 /* For communication from 'getopt' to the caller.
62 When 'getopt' finds an option that takes an argument,
63 the argument value is returned here.
64 Also, when 'ordering' is RETURN_IN_ORDER,
65 each non-option ARGV-element is returned here. */
66  
67 char *optarg;
68  
69 /* Index in ARGV of the next element to be scanned.
70 This is used for communication to and from the caller
71 and for communication between successive calls to 'getopt'.
72  
73 On entry to 'getopt', zero means this is the first call; initialize.
74  
75 When 'getopt' returns -1, this is the index of the first of the
76 non-option elements that the caller should itself scan.
77  
78 Otherwise, 'optind' communicates from one call to the next
79 how much of ARGV has been scanned so far. */
80  
81 /* 1003.2 says this must be 1 before any call. */
82 int optind = 1;
83  
84 /* Callers store zero here to inhibit the error message
85 for unrecognized options. */
86  
87 int opterr = 1;
88  
89 /* Set to an option character which was unrecognized.
90 This must be initialized on some systems to avoid linking in the
91 system's own getopt implementation. */
92  
93 int optopt = '?';
94  
95 /* Keep a global copy of all internal members of getopt_data. */
96  
97 static struct _getopt_data getopt_data;
98  
99  
100 #if defined HAVE_DECL_GETENV && !HAVE_DECL_GETENV
101 extern char *getenv ();
102 #endif
103  
104 #ifdef _LIBC
105 /* Stored original parameters.
106 XXX This is no good solution. We should rather copy the args so
107 that we can compare them later. But we must not use malloc(3). */
108 extern int __libc_argc;
109 extern char **__libc_argv;
110  
111 /* Bash 2.0 gives us an environment variable containing flags
112 indicating ARGV elements that should not be considered arguments. */
113  
114 # ifdef USE_NONOPTION_FLAGS
115 /* Defined in getopt_init.c */
116 extern char *__getopt_nonoption_flags;
117 # endif
118  
119 # ifdef USE_NONOPTION_FLAGS
120 # define SWAP_FLAGS(ch1, ch2) \
121 if (d->__nonoption_flags_len > 0) \
122 { \
123 char __tmp = __getopt_nonoption_flags[ch1]; \
124 __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \
125 __getopt_nonoption_flags[ch2] = __tmp; \
126 }
127 # else
128 # define SWAP_FLAGS(ch1, ch2)
129 # endif
130 #else /* !_LIBC */
131 # define SWAP_FLAGS(ch1, ch2)
132 #endif /* _LIBC */
133  
134 /* Exchange two adjacent subsequences of ARGV.
135 One subsequence is elements [first_nonopt,last_nonopt)
136 which contains all the non-options that have been skipped so far.
137 The other is elements [last_nonopt,optind), which contains all
138 the options processed since those non-options were skipped.
139  
140 'first_nonopt' and 'last_nonopt' are relocated so that they describe
141 the new indices of the non-options in ARGV after they are moved. */
142  
143 static void
144 exchange (char **argv, struct _getopt_data *d)
145 {
146 int bottom = d->__first_nonopt;
147 int middle = d->__last_nonopt;
148 int top = d->optind;
149 char *tem;
150  
151 /* Exchange the shorter segment with the far end of the longer segment.
152 That puts the shorter segment into the right place.
153 It leaves the longer segment in the right place overall,
154 but it consists of two parts that need to be swapped next. */
155  
156 #if defined _LIBC && defined USE_NONOPTION_FLAGS
157 /* First make sure the handling of the '__getopt_nonoption_flags'
158 string can work normally. Our top argument must be in the range
159 of the string. */
160 if (d->__nonoption_flags_len > 0 && top >= d->__nonoption_flags_max_len)
161 {
162 /* We must extend the array. The user plays games with us and
163 presents new arguments. */
164 char *new_str = malloc (top + 1);
165 if (new_str == NULL)
166 d->__nonoption_flags_len = d->__nonoption_flags_max_len = 0;
167 else
168 {
169 memset (__mempcpy (new_str, __getopt_nonoption_flags,
170 d->__nonoption_flags_max_len),
171 '\0', top + 1 - d->__nonoption_flags_max_len);
172 d->__nonoption_flags_max_len = top + 1;
173 __getopt_nonoption_flags = new_str;
174 }
175 }
176 #endif
177  
178 while (top > middle && middle > bottom)
179 {
180 if (top - middle > middle - bottom)
181 {
182 /* Bottom segment is the short one. */
183 int len = middle - bottom;
184 register int i;
185  
186 /* Swap it with the top part of the top segment. */
187 for (i = 0; i < len; i++)
188 {
189 tem = argv[bottom + i];
190 argv[bottom + i] = argv[top - (middle - bottom) + i];
191 argv[top - (middle - bottom) + i] = tem;
192 SWAP_FLAGS (bottom + i, top - (middle - bottom) + i);
193 }
194 /* Exclude the moved bottom segment from further swapping. */
195 top -= len;
196 }
197 else
198 {
199 /* Top segment is the short one. */
200 int len = top - middle;
201 register int i;
202  
203 /* Swap it with the bottom part of the bottom segment. */
204 for (i = 0; i < len; i++)
205 {
206 tem = argv[bottom + i];
207 argv[bottom + i] = argv[middle + i];
208 argv[middle + i] = tem;
209 SWAP_FLAGS (bottom + i, middle + i);
210 }
211 /* Exclude the moved top segment from further swapping. */
212 bottom += len;
213 }
214 }
215  
216 /* Update records for the slots the non-options now occupy. */
217  
218 d->__first_nonopt += (d->optind - d->__last_nonopt);
219 d->__last_nonopt = d->optind;
220 }
221  
222 /* Initialize the internal data when the first call is made. */
223  
224 static const char *
225 _getopt_initialize (int argc _GL_UNUSED,
226 char **argv _GL_UNUSED, const char *optstring,
227 struct _getopt_data *d, int posixly_correct)
228 {
229 /* Start processing options with ARGV-element 1 (since ARGV-element 0
230 is the program name); the sequence of previously skipped
231 non-option ARGV-elements is empty. */
232  
233 d->__first_nonopt = d->__last_nonopt = d->optind;
234  
235 d->__nextchar = NULL;
236  
237 d->__posixly_correct = posixly_correct || !!getenv ("POSIXLY_CORRECT");
238  
239 /* Determine how to handle the ordering of options and nonoptions. */
240  
241 if (optstring[0] == '-')
242 {
243 d->__ordering = RETURN_IN_ORDER;
244 ++optstring;
245 }
246 else if (optstring[0] == '+')
247 {
248 d->__ordering = REQUIRE_ORDER;
249 ++optstring;
250 }
251 else if (d->__posixly_correct)
252 d->__ordering = REQUIRE_ORDER;
253 else
254 d->__ordering = PERMUTE;
255  
256 #if defined _LIBC && defined USE_NONOPTION_FLAGS
257 if (!d->__posixly_correct
258 && argc == __libc_argc && argv == __libc_argv)
259 {
260 if (d->__nonoption_flags_max_len == 0)
261 {
262 if (__getopt_nonoption_flags == NULL
263 || __getopt_nonoption_flags[0] == '\0')
264 d->__nonoption_flags_max_len = -1;
265 else
266 {
267 const char *orig_str = __getopt_nonoption_flags;
268 int len = d->__nonoption_flags_max_len = strlen (orig_str);
269 if (d->__nonoption_flags_max_len < argc)
270 d->__nonoption_flags_max_len = argc;
271 __getopt_nonoption_flags =
272 (char *) malloc (d->__nonoption_flags_max_len);
273 if (__getopt_nonoption_flags == NULL)
274 d->__nonoption_flags_max_len = -1;
275 else
276 memset (__mempcpy (__getopt_nonoption_flags, orig_str, len),
277 '\0', d->__nonoption_flags_max_len - len);
278 }
279 }
280 d->__nonoption_flags_len = d->__nonoption_flags_max_len;
281 }
282 else
283 d->__nonoption_flags_len = 0;
284 #endif
285  
286 return optstring;
287 }
288  
289 /* Scan elements of ARGV (whose length is ARGC) for option characters
290 given in OPTSTRING.
291  
292 If an element of ARGV starts with '-', and is not exactly "-" or "--",
293 then it is an option element. The characters of this element
294 (aside from the initial '-') are option characters. If 'getopt'
295 is called repeatedly, it returns successively each of the option characters
296 from each of the option elements.
297  
298 If 'getopt' finds another option character, it returns that character,
299 updating 'optind' and 'nextchar' so that the next call to 'getopt' can
300 resume the scan with the following option character or ARGV-element.
301  
302 If there are no more option characters, 'getopt' returns -1.
303 Then 'optind' is the index in ARGV of the first ARGV-element
304 that is not an option. (The ARGV-elements have been permuted
305 so that those that are not options now come last.)
306  
307 OPTSTRING is a string containing the legitimate option characters.
308 If an option character is seen that is not listed in OPTSTRING,
309 return '?' after printing an error message. If you set 'opterr' to
310 zero, the error message is suppressed but we still return '?'.
311  
312 If a char in OPTSTRING is followed by a colon, that means it wants an arg,
313 so the following text in the same ARGV-element, or the text of the following
314 ARGV-element, is returned in 'optarg'. Two colons mean an option that
315 wants an optional arg; if there is text in the current ARGV-element,
316 it is returned in 'optarg', otherwise 'optarg' is set to zero.
317  
318 If OPTSTRING starts with '-' or '+', it requests different methods of
319 handling the non-option ARGV-elements.
320 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
321  
322 Long-named options begin with '--' instead of '-'.
323 Their names may be abbreviated as long as the abbreviation is unique
324 or is an exact match for some defined option. If they have an
325 argument, it follows the option name in the same ARGV-element, separated
326 from the option name by a '=', or else the in next ARGV-element.
327 When 'getopt' finds a long-named option, it returns 0 if that option's
328 'flag' field is nonzero, the value of the option's 'val' field
329 if the 'flag' field is zero.
330  
331 The elements of ARGV aren't really const, because we permute them.
332 But we pretend they're const in the prototype to be compatible
333 with other systems.
334  
335 LONGOPTS is a vector of 'struct option' terminated by an
336 element containing a name which is zero.
337  
338 LONGIND returns the index in LONGOPT of the long-named option found.
339 It is only valid when a long-named option has been found by the most
340 recent call.
341  
342 If LONG_ONLY is nonzero, '-' as well as '--' can introduce
343 long-named options. */
344  
345 int
346 _getopt_internal_r (int argc, char **argv, const char *optstring,
347 const struct option *longopts, int *longind,
348 int long_only, struct _getopt_data *d, int posixly_correct)
349 {
350 int print_errors = d->opterr;
351  
352 if (argc < 1)
353 return -1;
354  
355 d->optarg = NULL;
356  
357 if (d->optind == 0 || !d->__initialized)
358 {
359 if (d->optind == 0)
360 d->optind = 1; /* Don't scan ARGV[0], the program name. */
361 optstring = _getopt_initialize (argc, argv, optstring, d,
362 posixly_correct);
363 d->__initialized = 1;
364 }
365 else if (optstring[0] == '-' || optstring[0] == '+')
366 optstring++;
367 if (optstring[0] == ':')
368 print_errors = 0;
369  
370 /* Test whether ARGV[optind] points to a non-option argument.
371 Either it does not have option syntax, or there is an environment flag
372 from the shell indicating it is not an option. The later information
373 is only used when the used in the GNU libc. */
374 #if defined _LIBC && defined USE_NONOPTION_FLAGS
375 # define NONOPTION_P (argv[d->optind][0] != '-' || argv[d->optind][1] == '\0' \
376 || (d->optind < d->__nonoption_flags_len \
377 && __getopt_nonoption_flags[d->optind] == '1'))
378 #else
379 # define NONOPTION_P (argv[d->optind][0] != '-' || argv[d->optind][1] == '\0')
380 #endif
381  
382 if (d->__nextchar == NULL || *d->__nextchar == '\0')
383 {
384 /* Advance to the next ARGV-element. */
385  
386 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been
387 moved back by the user (who may also have changed the arguments). */
388 if (d->__last_nonopt > d->optind)
389 d->__last_nonopt = d->optind;
390 if (d->__first_nonopt > d->optind)
391 d->__first_nonopt = d->optind;
392  
393 if (d->__ordering == PERMUTE)
394 {
395 /* If we have just processed some options following some non-options,
396 exchange them so that the options come first. */
397  
398 if (d->__first_nonopt != d->__last_nonopt
399 && d->__last_nonopt != d->optind)
400 exchange ((char **) argv, d);
401 else if (d->__last_nonopt != d->optind)
402 d->__first_nonopt = d->optind;
403  
404 /* Skip any additional non-options
405 and extend the range of non-options previously skipped. */
406  
407 while (d->optind < argc && NONOPTION_P)
408 d->optind++;
409 d->__last_nonopt = d->optind;
410 }
411  
412 /* The special ARGV-element '--' means premature end of options.
413 Skip it like a null option,
414 then exchange with previous non-options as if it were an option,
415 then skip everything else like a non-option. */
416  
417 if (d->optind != argc && !strcmp (argv[d->optind], "--"))
418 {
419 d->optind++;
420  
421 if (d->__first_nonopt != d->__last_nonopt
422 && d->__last_nonopt != d->optind)
423 exchange ((char **) argv, d);
424 else if (d->__first_nonopt == d->__last_nonopt)
425 d->__first_nonopt = d->optind;
426 d->__last_nonopt = argc;
427  
428 d->optind = argc;
429 }
430  
431 /* If we have done all the ARGV-elements, stop the scan
432 and back over any non-options that we skipped and permuted. */
433  
434 if (d->optind == argc)
435 {
436 /* Set the next-arg-index to point at the non-options
437 that we previously skipped, so the caller will digest them. */
438 if (d->__first_nonopt != d->__last_nonopt)
439 d->optind = d->__first_nonopt;
440 return -1;
441 }
442  
443 /* If we have come to a non-option and did not permute it,
444 either stop the scan or describe it to the caller and pass it by. */
445  
446 if (NONOPTION_P)
447 {
448 if (d->__ordering == REQUIRE_ORDER)
449 return -1;
450 d->optarg = argv[d->optind++];
451 return 1;
452 }
453  
454 /* We have found another option-ARGV-element.
455 Skip the initial punctuation. */
456  
457 d->__nextchar = (argv[d->optind] + 1
458 + (longopts != NULL && argv[d->optind][1] == '-'));
459 }
460  
461 /* Decode the current option-ARGV-element. */
462  
463 /* Check whether the ARGV-element is a long option.
464  
465 If long_only and the ARGV-element has the form "-f", where f is
466 a valid short option, don't consider it an abbreviated form of
467 a long option that starts with f. Otherwise there would be no
468 way to give the -f short option.
469  
470 On the other hand, if there's a long option "fubar" and
471 the ARGV-element is "-fu", do consider that an abbreviation of
472 the long option, just like "--fu", and not "-f" with arg "u".
473  
474 This distinction seems to be the most useful approach. */
475  
476 if (longopts != NULL
477 && (argv[d->optind][1] == '-'
478 || (long_only && (argv[d->optind][2]
479 || !strchr (optstring, argv[d->optind][1])))))
480 {
481 char *nameend;
482 unsigned int namelen;
483 const struct option *p;
484 const struct option *pfound = NULL;
485 struct option_list
486 {
487 const struct option *p;
488 struct option_list *next;
489 } *ambig_list = NULL;
490 #ifdef _LIBC
491 /* malloc() not used for _LIBC to simplify failure messages. */
492 # define free_option_list(l)
493 #else
494 # define free_option_list(l) \
495 while (l != NULL) \
496 { \
497 struct option_list *pn = l->next; \
498 free (l); \
499 l = pn; \
500 }
501 #endif
502 int exact = 0;
503 int ambig = 0;
504 int indfound = -1;
505 int option_index;
506  
507 for (nameend = d->__nextchar; *nameend && *nameend != '='; nameend++)
508 /* Do nothing. */ ;
509 namelen = nameend - d->__nextchar;
510  
511 /* Test all long options for either exact match
512 or abbreviated matches. */
513 for (p = longopts, option_index = 0; p->name; p++, option_index++)
514 if (!strncmp (p->name, d->__nextchar, namelen))
515 {
516 if (namelen == (unsigned int) strlen (p->name))
517 {
518 /* Exact match found. */
519 pfound = p;
520 indfound = option_index;
521 exact = 1;
522 break;
523 }
524 else if (pfound == NULL)
525 {
526 /* First nonexact match found. */
527 pfound = p;
528 indfound = option_index;
529 }
530 else if (ambig)
531 ; /* Taking simpler path to handling ambiguities. */
532 else if (long_only
533 || pfound->has_arg != p->has_arg
534 || pfound->flag != p->flag
535 || pfound->val != p->val)
536 {
537 /* Second or later nonexact match found. */
538 #ifdef _LIBC
539 struct option_list *newp = alloca (sizeof (*newp));
540 #else
541 struct option_list *newp = malloc (sizeof (*newp));
542 if (newp == NULL)
543 {
544 free_option_list (ambig_list);
545 ambig_list = NULL;
546 ambig = 1; /* Use simpler fallback message. */
547 }
548 else
549 #endif
550 {
551 newp->p = p;
552 newp->next = ambig_list;
553 ambig_list = newp;
554 }
555 }
556 }
557  
558 if ((ambig || ambig_list) && !exact)
559 {
560 if (print_errors && ambig_list)
561 {
562 struct option_list first;
563 first.p = pfound;
564 first.next = ambig_list;
565 ambig_list = &first;
566  
567 #if defined _LIBC && defined USE_IN_LIBIO
568 char *buf = NULL;
569 size_t buflen = 0;
570  
571 FILE *fp = open_memstream (&buf, &buflen);
572 if (fp != NULL)
573 {
574 fprintf (fp,
575 _("%s: option '%s' is ambiguous; possibilities:"),
576 argv[0], argv[d->optind]);
577  
578 do
579 {
580 fprintf (fp, " '--%s'", ambig_list->p->name);
581 ambig_list = ambig_list->next;
582 }
583 while (ambig_list != NULL);
584  
585 fputc_unlocked ('\n', fp);
586  
587 if (__builtin_expect (fclose (fp) != EOF, 1))
588 {
589 _IO_flockfile (stderr);
590  
591 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
592 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
593  
594 __fxprintf (NULL, "%s", buf);
595  
596 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
597 _IO_funlockfile (stderr);
598  
599 free (buf);
600 }
601 }
602 #else
603 fprintf (stderr,
604 _("%s: option '%s' is ambiguous; possibilities:"),
605 argv[0], argv[d->optind]);
606 do
607 {
608 fprintf (stderr, " '--%s'", ambig_list->p->name);
609 ambig_list = ambig_list->next;
610 }
611 while (ambig_list != NULL);
612  
613 fputc ('\n', stderr);
614 #endif
615 }
616 else if (print_errors && ambig)
617 {
618 fprintf (stderr,
619 _("%s: option '%s' is ambiguous\n"),
620 argv[0], argv[d->optind]);
621 }
622 d->__nextchar += strlen (d->__nextchar);
623 d->optind++;
624 d->optopt = 0;
625 free_option_list (ambig_list);
626 return '?';
627 }
628  
629 free_option_list (ambig_list);
630  
631 if (pfound != NULL)
632 {
633 option_index = indfound;
634 d->optind++;
635 if (*nameend)
636 {
637 /* Don't test has_arg with >, because some C compilers don't
638 allow it to be used on enums. */
639 if (pfound->has_arg)
640 d->optarg = nameend + 1;
641 else
642 {
643 if (print_errors)
644 {
645 #if defined _LIBC && defined USE_IN_LIBIO
646 char *buf;
647 int n;
648 #endif
649  
650 if (argv[d->optind - 1][1] == '-')
651 {
652 /* --option */
653 #if defined _LIBC && defined USE_IN_LIBIO
654 n = __asprintf (&buf, _("\
655 %s: option '--%s' doesn't allow an argument\n"),
656 argv[0], pfound->name);
657 #else
658 fprintf (stderr, _("\
659 %s: option '--%s' doesn't allow an argument\n"),
660 argv[0], pfound->name);
661 #endif
662 }
663 else
664 {
665 /* +option or -option */
666 #if defined _LIBC && defined USE_IN_LIBIO
667 n = __asprintf (&buf, _("\
668 %s: option '%c%s' doesn't allow an argument\n"),
669 argv[0], argv[d->optind - 1][0],
670 pfound->name);
671 #else
672 fprintf (stderr, _("\
673 %s: option '%c%s' doesn't allow an argument\n"),
674 argv[0], argv[d->optind - 1][0],
675 pfound->name);
676 #endif
677 }
678  
679 #if defined _LIBC && defined USE_IN_LIBIO
680 if (n >= 0)
681 {
682 _IO_flockfile (stderr);
683  
684 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
685 ((_IO_FILE *) stderr)->_flags2
686 |= _IO_FLAGS2_NOTCANCEL;
687  
688 __fxprintf (NULL, "%s", buf);
689  
690 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
691 _IO_funlockfile (stderr);
692  
693 free (buf);
694 }
695 #endif
696 }
697  
698 d->__nextchar += strlen (d->__nextchar);
699  
700 d->optopt = pfound->val;
701 return '?';
702 }
703 }
704 else if (pfound->has_arg == 1)
705 {
706 if (d->optind < argc)
707 d->optarg = argv[d->optind++];
708 else
709 {
710 if (print_errors)
711 {
712 #if defined _LIBC && defined USE_IN_LIBIO
713 char *buf;
714  
715 if (__asprintf (&buf, _("\
716 %s: option '--%s' requires an argument\n"),
717 argv[0], pfound->name) >= 0)
718 {
719 _IO_flockfile (stderr);
720  
721 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
722 ((_IO_FILE *) stderr)->_flags2
723 |= _IO_FLAGS2_NOTCANCEL;
724  
725 __fxprintf (NULL, "%s", buf);
726  
727 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
728 _IO_funlockfile (stderr);
729  
730 free (buf);
731 }
732 #else
733 fprintf (stderr,
734 _("%s: option '--%s' requires an argument\n"),
735 argv[0], pfound->name);
736 #endif
737 }
738 d->__nextchar += strlen (d->__nextchar);
739 d->optopt = pfound->val;
740 return optstring[0] == ':' ? ':' : '?';
741 }
742 }
743 d->__nextchar += strlen (d->__nextchar);
744 if (longind != NULL)
745 *longind = option_index;
746 if (pfound->flag)
747 {
748 *(pfound->flag) = pfound->val;
749 return 0;
750 }
751 return pfound->val;
752 }
753  
754 /* Can't find it as a long option. If this is not getopt_long_only,
755 or the option starts with '--' or is not a valid short
756 option, then it's an error.
757 Otherwise interpret it as a short option. */
758 if (!long_only || argv[d->optind][1] == '-'
759 || strchr (optstring, *d->__nextchar) == NULL)
760 {
761 if (print_errors)
762 {
763 #if defined _LIBC && defined USE_IN_LIBIO
764 char *buf;
765 int n;
766 #endif
767  
768 if (argv[d->optind][1] == '-')
769 {
770 /* --option */
771 #if defined _LIBC && defined USE_IN_LIBIO
772 n = __asprintf (&buf, _("%s: unrecognized option '--%s'\n"),
773 argv[0], d->__nextchar);
774 #else
775 fprintf (stderr, _("%s: unrecognized option '--%s'\n"),
776 argv[0], d->__nextchar);
777 #endif
778 }
779 else
780 {
781 /* +option or -option */
782 #if defined _LIBC && defined USE_IN_LIBIO
783 n = __asprintf (&buf, _("%s: unrecognized option '%c%s'\n"),
784 argv[0], argv[d->optind][0], d->__nextchar);
785 #else
786 fprintf (stderr, _("%s: unrecognized option '%c%s'\n"),
787 argv[0], argv[d->optind][0], d->__nextchar);
788 #endif
789 }
790  
791 #if defined _LIBC && defined USE_IN_LIBIO
792 if (n >= 0)
793 {
794 _IO_flockfile (stderr);
795  
796 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
797 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
798  
799 __fxprintf (NULL, "%s", buf);
800  
801 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
802 _IO_funlockfile (stderr);
803  
804 free (buf);
805 }
806 #endif
807 }
808 d->__nextchar = (char *) "";
809 d->optind++;
810 d->optopt = 0;
811 return '?';
812 }
813 }
814  
815 /* Look at and handle the next short option-character. */
816  
817 {
818 char c = *d->__nextchar++;
819 const char *temp = strchr (optstring, c);
820  
821 /* Increment 'optind' when we start to process its last character. */
822 if (*d->__nextchar == '\0')
823 ++d->optind;
824  
825 if (temp == NULL || c == ':' || c == ';')
826 {
827 if (print_errors)
828 {
829 #if defined _LIBC && defined USE_IN_LIBIO
830 char *buf;
831 int n;
832 #endif
833  
834 #if defined _LIBC && defined USE_IN_LIBIO
835 n = __asprintf (&buf, _("%s: invalid option -- '%c'\n"),
836 argv[0], c);
837 #else
838 fprintf (stderr, _("%s: invalid option -- '%c'\n"), argv[0], c);
839 #endif
840  
841 #if defined _LIBC && defined USE_IN_LIBIO
842 if (n >= 0)
843 {
844 _IO_flockfile (stderr);
845  
846 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
847 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
848  
849 __fxprintf (NULL, "%s", buf);
850  
851 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
852 _IO_funlockfile (stderr);
853  
854 free (buf);
855 }
856 #endif
857 }
858 d->optopt = c;
859 return '?';
860 }
861 /* Convenience. Treat POSIX -W foo same as long option --foo */
862 if (temp[0] == 'W' && temp[1] == ';')
863 {
864 char *nameend;
865 const struct option *p;
866 const struct option *pfound = NULL;
867 int exact = 0;
868 int ambig = 0;
869 int indfound = 0;
870 int option_index;
871  
872 if (longopts == NULL)
873 goto no_longs;
874  
875 /* This is an option that requires an argument. */
876 if (*d->__nextchar != '\0')
877 {
878 d->optarg = d->__nextchar;
879 /* If we end this ARGV-element by taking the rest as an arg,
880 we must advance to the next element now. */
881 d->optind++;
882 }
883 else if (d->optind == argc)
884 {
885 if (print_errors)
886 {
887 #if defined _LIBC && defined USE_IN_LIBIO
888 char *buf;
889  
890 if (__asprintf (&buf,
891 _("%s: option requires an argument -- '%c'\n"),
892 argv[0], c) >= 0)
893 {
894 _IO_flockfile (stderr);
895  
896 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
897 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
898  
899 __fxprintf (NULL, "%s", buf);
900  
901 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
902 _IO_funlockfile (stderr);
903  
904 free (buf);
905 }
906 #else
907 fprintf (stderr,
908 _("%s: option requires an argument -- '%c'\n"),
909 argv[0], c);
910 #endif
911 }
912 d->optopt = c;
913 if (optstring[0] == ':')
914 c = ':';
915 else
916 c = '?';
917 return c;
918 }
919 else
920 /* We already incremented 'd->optind' once;
921 increment it again when taking next ARGV-elt as argument. */
922 d->optarg = argv[d->optind++];
923  
924 /* optarg is now the argument, see if it's in the
925 table of longopts. */
926  
927 for (d->__nextchar = nameend = d->optarg; *nameend && *nameend != '=';
928 nameend++)
929 /* Do nothing. */ ;
930  
931 /* Test all long options for either exact match
932 or abbreviated matches. */
933 for (p = longopts, option_index = 0; p->name; p++, option_index++)
934 if (!strncmp (p->name, d->__nextchar, nameend - d->__nextchar))
935 {
936 if ((unsigned int) (nameend - d->__nextchar) == strlen (p->name))
937 {
938 /* Exact match found. */
939 pfound = p;
940 indfound = option_index;
941 exact = 1;
942 break;
943 }
944 else if (pfound == NULL)
945 {
946 /* First nonexact match found. */
947 pfound = p;
948 indfound = option_index;
949 }
950 else if (long_only
951 || pfound->has_arg != p->has_arg
952 || pfound->flag != p->flag
953 || pfound->val != p->val)
954 /* Second or later nonexact match found. */
955 ambig = 1;
956 }
957 if (ambig && !exact)
958 {
959 if (print_errors)
960 {
961 #if defined _LIBC && defined USE_IN_LIBIO
962 char *buf;
963  
964 if (__asprintf (&buf, _("%s: option '-W %s' is ambiguous\n"),
965 argv[0], d->optarg) >= 0)
966 {
967 _IO_flockfile (stderr);
968  
969 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
970 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
971  
972 __fxprintf (NULL, "%s", buf);
973  
974 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
975 _IO_funlockfile (stderr);
976  
977 free (buf);
978 }
979 #else
980 fprintf (stderr, _("%s: option '-W %s' is ambiguous\n"),
981 argv[0], d->optarg);
982 #endif
983 }
984 d->__nextchar += strlen (d->__nextchar);
985 d->optind++;
986 return '?';
987 }
988 if (pfound != NULL)
989 {
990 option_index = indfound;
991 if (*nameend)
992 {
993 /* Don't test has_arg with >, because some C compilers don't
994 allow it to be used on enums. */
995 if (pfound->has_arg)
996 d->optarg = nameend + 1;
997 else
998 {
999 if (print_errors)
1000 {
1001 #if defined _LIBC && defined USE_IN_LIBIO
1002 char *buf;
1003  
1004 if (__asprintf (&buf, _("\
1005 %s: option '-W %s' doesn't allow an argument\n"),
1006 argv[0], pfound->name) >= 0)
1007 {
1008 _IO_flockfile (stderr);
1009  
1010 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
1011 ((_IO_FILE *) stderr)->_flags2
1012 |= _IO_FLAGS2_NOTCANCEL;
1013  
1014 __fxprintf (NULL, "%s", buf);
1015  
1016 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
1017 _IO_funlockfile (stderr);
1018  
1019 free (buf);
1020 }
1021 #else
1022 fprintf (stderr, _("\
1023 %s: option '-W %s' doesn't allow an argument\n"),
1024 argv[0], pfound->name);
1025 #endif
1026 }
1027  
1028 d->__nextchar += strlen (d->__nextchar);
1029 return '?';
1030 }
1031 }
1032 else if (pfound->has_arg == 1)
1033 {
1034 if (d->optind < argc)
1035 d->optarg = argv[d->optind++];
1036 else
1037 {
1038 if (print_errors)
1039 {
1040 #if defined _LIBC && defined USE_IN_LIBIO
1041 char *buf;
1042  
1043 if (__asprintf (&buf, _("\
1044 %s: option '-W %s' requires an argument\n"),
1045 argv[0], pfound->name) >= 0)
1046 {
1047 _IO_flockfile (stderr);
1048  
1049 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
1050 ((_IO_FILE *) stderr)->_flags2
1051 |= _IO_FLAGS2_NOTCANCEL;
1052  
1053 __fxprintf (NULL, "%s", buf);
1054  
1055 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
1056 _IO_funlockfile (stderr);
1057  
1058 free (buf);
1059 }
1060 #else
1061 fprintf (stderr, _("\
1062 %s: option '-W %s' requires an argument\n"),
1063 argv[0], pfound->name);
1064 #endif
1065 }
1066 d->__nextchar += strlen (d->__nextchar);
1067 return optstring[0] == ':' ? ':' : '?';
1068 }
1069 }
1070 else
1071 d->optarg = NULL;
1072 d->__nextchar += strlen (d->__nextchar);
1073 if (longind != NULL)
1074 *longind = option_index;
1075 if (pfound->flag)
1076 {
1077 *(pfound->flag) = pfound->val;
1078 return 0;
1079 }
1080 return pfound->val;
1081 }
1082  
1083 no_longs:
1084 d->__nextchar = NULL;
1085 return 'W'; /* Let the application handle it. */
1086 }
1087 if (temp[1] == ':')
1088 {
1089 if (temp[2] == ':')
1090 {
1091 /* This is an option that accepts an argument optionally. */
1092 if (*d->__nextchar != '\0')
1093 {
1094 d->optarg = d->__nextchar;
1095 d->optind++;
1096 }
1097 else
1098 d->optarg = NULL;
1099 d->__nextchar = NULL;
1100 }
1101 else
1102 {
1103 /* This is an option that requires an argument. */
1104 if (*d->__nextchar != '\0')
1105 {
1106 d->optarg = d->__nextchar;
1107 /* If we end this ARGV-element by taking the rest as an arg,
1108 we must advance to the next element now. */
1109 d->optind++;
1110 }
1111 else if (d->optind == argc)
1112 {
1113 if (print_errors)
1114 {
1115 #if defined _LIBC && defined USE_IN_LIBIO
1116 char *buf;
1117  
1118 if (__asprintf (&buf, _("\
1119 %s: option requires an argument -- '%c'\n"),
1120 argv[0], c) >= 0)
1121 {
1122 _IO_flockfile (stderr);
1123  
1124 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
1125 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
1126  
1127 __fxprintf (NULL, "%s", buf);
1128  
1129 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
1130 _IO_funlockfile (stderr);
1131  
1132 free (buf);
1133 }
1134 #else
1135 fprintf (stderr,
1136 _("%s: option requires an argument -- '%c'\n"),
1137 argv[0], c);
1138 #endif
1139 }
1140 d->optopt = c;
1141 if (optstring[0] == ':')
1142 c = ':';
1143 else
1144 c = '?';
1145 }
1146 else
1147 /* We already incremented 'optind' once;
1148 increment it again when taking next ARGV-elt as argument. */
1149 d->optarg = argv[d->optind++];
1150 d->__nextchar = NULL;
1151 }
1152 }
1153 return c;
1154 }
1155 }
1156  
1157 int
1158 _getopt_internal (int argc, char **argv, const char *optstring,
1159 const struct option *longopts, int *longind, int long_only,
1160 int posixly_correct)
1161 {
1162 int result;
1163  
1164 getopt_data.optind = optind;
1165 getopt_data.opterr = opterr;
1166  
1167 result = _getopt_internal_r (argc, argv, optstring, longopts,
1168 longind, long_only, &getopt_data,
1169 posixly_correct);
1170  
1171 optind = getopt_data.optind;
1172 optarg = getopt_data.optarg;
1173 optopt = getopt_data.optopt;
1174  
1175 return result;
1176 }
1177  
1178 /* glibc gets a LSB-compliant getopt.
1179 Standalone applications get a POSIX-compliant getopt. */
1180 #if _LIBC
1181 enum { POSIXLY_CORRECT = 0 };
1182 #else
1183 enum { POSIXLY_CORRECT = 1 };
1184 #endif
1185  
1186 int
1187 getopt (int argc, char *const *argv, const char *optstring)
1188 {
1189 return _getopt_internal (argc, (char **) argv, optstring,
1190 (const struct option *) 0,
1191 (int *) 0,
1192 0, POSIXLY_CORRECT);
1193 }
1194  
1195 #ifdef _LIBC
1196 int
1197 __posix_getopt (int argc, char *const *argv, const char *optstring)
1198 {
1199 return _getopt_internal (argc, argv, optstring,
1200 (const struct option *) 0,
1201 (int *) 0,
1202 0, 1);
1203 }
1204 #endif
1205  
1206  
1207 #ifdef TEST
1208  
1209 /* Compile with -DTEST to make an executable for use in testing
1210 the above definition of 'getopt'. */
1211  
1212 int
1213 main (int argc, char **argv)
1214 {
1215 int c;
1216 int digit_optind = 0;
1217  
1218 while (1)
1219 {
1220 int this_option_optind = optind ? optind : 1;
1221  
1222 c = getopt (argc, argv, "abc:d:0123456789");
1223 if (c == -1)
1224 break;
1225  
1226 switch (c)
1227 {
1228 case '0':
1229 case '1':
1230 case '2':
1231 case '3':
1232 case '4':
1233 case '5':
1234 case '6':
1235 case '7':
1236 case '8':
1237 case '9':
1238 if (digit_optind != 0 && digit_optind != this_option_optind)
1239 printf ("digits occur in two different argv-elements.\n");
1240 digit_optind = this_option_optind;
1241 printf ("option %c\n", c);
1242 break;
1243  
1244 case 'a':
1245 printf ("option a\n");
1246 break;
1247  
1248 case 'b':
1249 printf ("option b\n");
1250 break;
1251  
1252 case 'c':
1253 printf ("option c with value '%s'\n", optarg);
1254 break;
1255  
1256 case '?':
1257 break;
1258  
1259 default:
1260 printf ("?? getopt returned character code 0%o ??\n", c);
1261 }
1262 }
1263  
1264 if (optind < argc)
1265 {
1266 printf ("non-option ARGV-elements: ");
1267 while (optind < argc)
1268 printf ("%s ", argv[optind++]);
1269 printf ("\n");
1270 }
1271  
1272 exit (0);
1273 }
1274  
1275 #endif /* TEST */