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, 2008-2012 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
exchange(char ** argv,struct _getopt_data * d)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 *
_getopt_initialize(int argc _GL_UNUSED,char ** argv _GL_UNUSED,const char * optstring,struct _getopt_data * d,int posixly_correct)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
_getopt_internal_r(int argc,char ** argv,const char * optstring,const struct option * longopts,int * longind,int long_only,struct _getopt_data * d,int posixly_correct)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 int exact = 0;
491 int indfound = -1;
492 int option_index;
493
494 for (nameend = d->__nextchar; *nameend && *nameend != '='; nameend++)
495 /* Do nothing. */ ;
496 namelen = nameend - d->__nextchar;
497
498 /* Test all long options for either exact match
499 or abbreviated matches. */
500 for (p = longopts, option_index = 0; p->name; p++, option_index++)
501 if (!strncmp (p->name, d->__nextchar, namelen))
502 {
503 if (namelen == (unsigned int) strlen (p->name))
504 {
505 /* Exact match found. */
506 pfound = p;
507 indfound = option_index;
508 exact = 1;
509 break;
510 }
511 else if (pfound == NULL)
512 {
513 /* First nonexact match found. */
514 pfound = p;
515 indfound = option_index;
516 }
517 else if (long_only
518 || pfound->has_arg != p->has_arg
519 || pfound->flag != p->flag
520 || pfound->val != p->val)
521 {
522 /* Second or later nonexact match found. */
523 struct option_list *newp = malloc (sizeof (*newp));
524 newp->p = p;
525 newp->next = ambig_list;
526 ambig_list = newp;
527 }
528 }
529
530 if (ambig_list != NULL && !exact)
531 {
532 if (print_errors)
533 {
534 struct option_list first;
535 first.p = pfound;
536 first.next = ambig_list;
537 ambig_list = &first;
538
539 #if defined _LIBC && defined USE_IN_LIBIO
540 char *buf = NULL;
541 size_t buflen = 0;
542
543 FILE *fp = open_memstream (&buf, &buflen);
544 if (fp != NULL)
545 {
546 fprintf (fp,
547 _("%s: option '%s' is ambiguous; possibilities:"),
548 argv[0], argv[d->optind]);
549
550 do
551 {
552 fprintf (fp, " '--%s'", ambig_list->p->name);
553 ambig_list = ambig_list->next;
554 }
555 while (ambig_list != NULL);
556
557 fputc_unlocked ('\n', fp);
558
559 if (__builtin_expect (fclose (fp) != EOF, 1))
560 {
561 _IO_flockfile (stderr);
562
563 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
564 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
565
566 __fxprintf (NULL, "%s", buf);
567
568 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
569 _IO_funlockfile (stderr);
570
571 free (buf);
572 }
573 }
574 #else
575 fprintf (stderr,
576 _("%s: option '%s' is ambiguous; possibilities:"),
577 argv[0], argv[d->optind]);
578 do
579 {
580 fprintf (stderr, " '--%s'", ambig_list->p->name);
581 ambig_list = ambig_list->next;
582 }
583 while (ambig_list != NULL);
584
585 fputc ('\n', stderr);
586 #endif
587 }
588 d->__nextchar += strlen (d->__nextchar);
589 d->optind++;
590 d->optopt = 0;
591 return '?';
592 }
593
594 while (ambig_list != NULL)
595 {
596 struct option_list *pn = ambig_list->next;
597 free (ambig_list);
598 ambig_list = pn;
599 }
600
601 if (pfound != NULL)
602 {
603 option_index = indfound;
604 d->optind++;
605 if (*nameend)
606 {
607 /* Don't test has_arg with >, because some C compilers don't
608 allow it to be used on enums. */
609 if (pfound->has_arg)
610 d->optarg = nameend + 1;
611 else
612 {
613 if (print_errors)
614 {
615 #if defined _LIBC && defined USE_IN_LIBIO
616 char *buf;
617 int n;
618 #endif
619
620 if (argv[d->optind - 1][1] == '-')
621 {
622 /* --option */
623 #if defined _LIBC && defined USE_IN_LIBIO
624 n = __asprintf (&buf, _("\
625 %s: option '--%s' doesn't allow an argument\n"),
626 argv[0], pfound->name);
627 #else
628 fprintf (stderr, _("\
629 %s: option '--%s' doesn't allow an argument\n"),
630 argv[0], pfound->name);
631 #endif
632 }
633 else
634 {
635 /* +option or -option */
636 #if defined _LIBC && defined USE_IN_LIBIO
637 n = __asprintf (&buf, _("\
638 %s: option '%c%s' doesn't allow an argument\n"),
639 argv[0], argv[d->optind - 1][0],
640 pfound->name);
641 #else
642 fprintf (stderr, _("\
643 %s: option '%c%s' doesn't allow an argument\n"),
644 argv[0], argv[d->optind - 1][0],
645 pfound->name);
646 #endif
647 }
648
649 #if defined _LIBC && defined USE_IN_LIBIO
650 if (n >= 0)
651 {
652 _IO_flockfile (stderr);
653
654 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
655 ((_IO_FILE *) stderr)->_flags2
656 |= _IO_FLAGS2_NOTCANCEL;
657
658 __fxprintf (NULL, "%s", buf);
659
660 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
661 _IO_funlockfile (stderr);
662
663 free (buf);
664 }
665 #endif
666 }
667
668 d->__nextchar += strlen (d->__nextchar);
669
670 d->optopt = pfound->val;
671 return '?';
672 }
673 }
674 else if (pfound->has_arg == 1)
675 {
676 if (d->optind < argc)
677 d->optarg = argv[d->optind++];
678 else
679 {
680 if (print_errors)
681 {
682 #if defined _LIBC && defined USE_IN_LIBIO
683 char *buf;
684
685 if (__asprintf (&buf, _("\
686 %s: option '--%s' requires an argument\n"),
687 argv[0], pfound->name) >= 0)
688 {
689 _IO_flockfile (stderr);
690
691 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
692 ((_IO_FILE *) stderr)->_flags2
693 |= _IO_FLAGS2_NOTCANCEL;
694
695 __fxprintf (NULL, "%s", buf);
696
697 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
698 _IO_funlockfile (stderr);
699
700 free (buf);
701 }
702 #else
703 fprintf (stderr,
704 _("%s: option '--%s' requires an argument\n"),
705 argv[0], pfound->name);
706 #endif
707 }
708 d->__nextchar += strlen (d->__nextchar);
709 d->optopt = pfound->val;
710 return optstring[0] == ':' ? ':' : '?';
711 }
712 }
713 d->__nextchar += strlen (d->__nextchar);
714 if (longind != NULL)
715 *longind = option_index;
716 if (pfound->flag)
717 {
718 *(pfound->flag) = pfound->val;
719 return 0;
720 }
721 return pfound->val;
722 }
723
724 /* Can't find it as a long option. If this is not getopt_long_only,
725 or the option starts with '--' or is not a valid short
726 option, then it's an error.
727 Otherwise interpret it as a short option. */
728 if (!long_only || argv[d->optind][1] == '-'
729 || strchr (optstring, *d->__nextchar) == NULL)
730 {
731 if (print_errors)
732 {
733 #if defined _LIBC && defined USE_IN_LIBIO
734 char *buf;
735 int n;
736 #endif
737
738 if (argv[d->optind][1] == '-')
739 {
740 /* --option */
741 #if defined _LIBC && defined USE_IN_LIBIO
742 n = __asprintf (&buf, _("%s: unrecognized option '--%s'\n"),
743 argv[0], d->__nextchar);
744 #else
745 fprintf (stderr, _("%s: unrecognized option '--%s'\n"),
746 argv[0], d->__nextchar);
747 #endif
748 }
749 else
750 {
751 /* +option or -option */
752 #if defined _LIBC && defined USE_IN_LIBIO
753 n = __asprintf (&buf, _("%s: unrecognized option '%c%s'\n"),
754 argv[0], argv[d->optind][0], d->__nextchar);
755 #else
756 fprintf (stderr, _("%s: unrecognized option '%c%s'\n"),
757 argv[0], argv[d->optind][0], d->__nextchar);
758 #endif
759 }
760
761 #if defined _LIBC && defined USE_IN_LIBIO
762 if (n >= 0)
763 {
764 _IO_flockfile (stderr);
765
766 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
767 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
768
769 __fxprintf (NULL, "%s", buf);
770
771 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
772 _IO_funlockfile (stderr);
773
774 free (buf);
775 }
776 #endif
777 }
778 d->__nextchar = (char *) "";
779 d->optind++;
780 d->optopt = 0;
781 return '?';
782 }
783 }
784
785 /* Look at and handle the next short option-character. */
786
787 {
788 char c = *d->__nextchar++;
789 const char *temp = strchr (optstring, c);
790
791 /* Increment 'optind' when we start to process its last character. */
792 if (*d->__nextchar == '\0')
793 ++d->optind;
794
795 if (temp == NULL || c == ':' || c == ';')
796 {
797 if (print_errors)
798 {
799 #if defined _LIBC && defined USE_IN_LIBIO
800 char *buf;
801 int n;
802 #endif
803
804 #if defined _LIBC && defined USE_IN_LIBIO
805 n = __asprintf (&buf, _("%s: invalid option -- '%c'\n"),
806 argv[0], c);
807 #else
808 fprintf (stderr, _("%s: invalid option -- '%c'\n"), argv[0], c);
809 #endif
810
811 #if defined _LIBC && defined USE_IN_LIBIO
812 if (n >= 0)
813 {
814 _IO_flockfile (stderr);
815
816 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
817 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
818
819 __fxprintf (NULL, "%s", buf);
820
821 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
822 _IO_funlockfile (stderr);
823
824 free (buf);
825 }
826 #endif
827 }
828 d->optopt = c;
829 return '?';
830 }
831 /* Convenience. Treat POSIX -W foo same as long option --foo */
832 if (temp[0] == 'W' && temp[1] == ';')
833 {
834 char *nameend;
835 const struct option *p;
836 const struct option *pfound = NULL;
837 int exact = 0;
838 int ambig = 0;
839 int indfound = 0;
840 int option_index;
841
842 if (longopts == NULL)
843 goto no_longs;
844
845 /* This is an option that requires an argument. */
846 if (*d->__nextchar != '\0')
847 {
848 d->optarg = d->__nextchar;
849 /* If we end this ARGV-element by taking the rest as an arg,
850 we must advance to the next element now. */
851 d->optind++;
852 }
853 else if (d->optind == argc)
854 {
855 if (print_errors)
856 {
857 #if defined _LIBC && defined USE_IN_LIBIO
858 char *buf;
859
860 if (__asprintf (&buf,
861 _("%s: option requires an argument -- '%c'\n"),
862 argv[0], c) >= 0)
863 {
864 _IO_flockfile (stderr);
865
866 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
867 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
868
869 __fxprintf (NULL, "%s", buf);
870
871 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
872 _IO_funlockfile (stderr);
873
874 free (buf);
875 }
876 #else
877 fprintf (stderr,
878 _("%s: option requires an argument -- '%c'\n"),
879 argv[0], c);
880 #endif
881 }
882 d->optopt = c;
883 if (optstring[0] == ':')
884 c = ':';
885 else
886 c = '?';
887 return c;
888 }
889 else
890 /* We already incremented 'd->optind' once;
891 increment it again when taking next ARGV-elt as argument. */
892 d->optarg = argv[d->optind++];
893
894 /* optarg is now the argument, see if it's in the
895 table of longopts. */
896
897 for (d->__nextchar = nameend = d->optarg; *nameend && *nameend != '=';
898 nameend++)
899 /* Do nothing. */ ;
900
901 /* Test all long options for either exact match
902 or abbreviated matches. */
903 for (p = longopts, option_index = 0; p->name; p++, option_index++)
904 if (!strncmp (p->name, d->__nextchar, nameend - d->__nextchar))
905 {
906 if ((unsigned int) (nameend - d->__nextchar) == strlen (p->name))
907 {
908 /* Exact match found. */
909 pfound = p;
910 indfound = option_index;
911 exact = 1;
912 break;
913 }
914 else if (pfound == NULL)
915 {
916 /* First nonexact match found. */
917 pfound = p;
918 indfound = option_index;
919 }
920 else if (long_only
921 || pfound->has_arg != p->has_arg
922 || pfound->flag != p->flag
923 || pfound->val != p->val)
924 /* Second or later nonexact match found. */
925 ambig = 1;
926 }
927 if (ambig && !exact)
928 {
929 if (print_errors)
930 {
931 #if defined _LIBC && defined USE_IN_LIBIO
932 char *buf;
933
934 if (__asprintf (&buf, _("%s: option '-W %s' is ambiguous\n"),
935 argv[0], d->optarg) >= 0)
936 {
937 _IO_flockfile (stderr);
938
939 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
940 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
941
942 __fxprintf (NULL, "%s", buf);
943
944 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
945 _IO_funlockfile (stderr);
946
947 free (buf);
948 }
949 #else
950 fprintf (stderr, _("%s: option '-W %s' is ambiguous\n"),
951 argv[0], d->optarg);
952 #endif
953 }
954 d->__nextchar += strlen (d->__nextchar);
955 d->optind++;
956 return '?';
957 }
958 if (pfound != NULL)
959 {
960 option_index = indfound;
961 if (*nameend)
962 {
963 /* Don't test has_arg with >, because some C compilers don't
964 allow it to be used on enums. */
965 if (pfound->has_arg)
966 d->optarg = nameend + 1;
967 else
968 {
969 if (print_errors)
970 {
971 #if defined _LIBC && defined USE_IN_LIBIO
972 char *buf;
973
974 if (__asprintf (&buf, _("\
975 %s: option '-W %s' doesn't allow an argument\n"),
976 argv[0], pfound->name) >= 0)
977 {
978 _IO_flockfile (stderr);
979
980 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
981 ((_IO_FILE *) stderr)->_flags2
982 |= _IO_FLAGS2_NOTCANCEL;
983
984 __fxprintf (NULL, "%s", buf);
985
986 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
987 _IO_funlockfile (stderr);
988
989 free (buf);
990 }
991 #else
992 fprintf (stderr, _("\
993 %s: option '-W %s' doesn't allow an argument\n"),
994 argv[0], pfound->name);
995 #endif
996 }
997
998 d->__nextchar += strlen (d->__nextchar);
999 return '?';
1000 }
1001 }
1002 else if (pfound->has_arg == 1)
1003 {
1004 if (d->optind < argc)
1005 d->optarg = argv[d->optind++];
1006 else
1007 {
1008 if (print_errors)
1009 {
1010 #if defined _LIBC && defined USE_IN_LIBIO
1011 char *buf;
1012
1013 if (__asprintf (&buf, _("\
1014 %s: option '-W %s' requires an argument\n"),
1015 argv[0], pfound->name) >= 0)
1016 {
1017 _IO_flockfile (stderr);
1018
1019 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
1020 ((_IO_FILE *) stderr)->_flags2
1021 |= _IO_FLAGS2_NOTCANCEL;
1022
1023 __fxprintf (NULL, "%s", buf);
1024
1025 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
1026 _IO_funlockfile (stderr);
1027
1028 free (buf);
1029 }
1030 #else
1031 fprintf (stderr, _("\
1032 %s: option '-W %s' requires an argument\n"),
1033 argv[0], pfound->name);
1034 #endif
1035 }
1036 d->__nextchar += strlen (d->__nextchar);
1037 return optstring[0] == ':' ? ':' : '?';
1038 }
1039 }
1040 else
1041 d->optarg = NULL;
1042 d->__nextchar += strlen (d->__nextchar);
1043 if (longind != NULL)
1044 *longind = option_index;
1045 if (pfound->flag)
1046 {
1047 *(pfound->flag) = pfound->val;
1048 return 0;
1049 }
1050 return pfound->val;
1051 }
1052
1053 no_longs:
1054 d->__nextchar = NULL;
1055 return 'W'; /* Let the application handle it. */
1056 }
1057 if (temp[1] == ':')
1058 {
1059 if (temp[2] == ':')
1060 {
1061 /* This is an option that accepts an argument optionally. */
1062 if (*d->__nextchar != '\0')
1063 {
1064 d->optarg = d->__nextchar;
1065 d->optind++;
1066 }
1067 else
1068 d->optarg = NULL;
1069 d->__nextchar = NULL;
1070 }
1071 else
1072 {
1073 /* This is an option that requires an argument. */
1074 if (*d->__nextchar != '\0')
1075 {
1076 d->optarg = d->__nextchar;
1077 /* If we end this ARGV-element by taking the rest as an arg,
1078 we must advance to the next element now. */
1079 d->optind++;
1080 }
1081 else if (d->optind == argc)
1082 {
1083 if (print_errors)
1084 {
1085 #if defined _LIBC && defined USE_IN_LIBIO
1086 char *buf;
1087
1088 if (__asprintf (&buf, _("\
1089 %s: option requires an argument -- '%c'\n"),
1090 argv[0], c) >= 0)
1091 {
1092 _IO_flockfile (stderr);
1093
1094 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
1095 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
1096
1097 __fxprintf (NULL, "%s", buf);
1098
1099 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
1100 _IO_funlockfile (stderr);
1101
1102 free (buf);
1103 }
1104 #else
1105 fprintf (stderr,
1106 _("%s: option requires an argument -- '%c'\n"),
1107 argv[0], c);
1108 #endif
1109 }
1110 d->optopt = c;
1111 if (optstring[0] == ':')
1112 c = ':';
1113 else
1114 c = '?';
1115 }
1116 else
1117 /* We already incremented 'optind' once;
1118 increment it again when taking next ARGV-elt as argument. */
1119 d->optarg = argv[d->optind++];
1120 d->__nextchar = NULL;
1121 }
1122 }
1123 return c;
1124 }
1125 }
1126
1127 int
_getopt_internal(int argc,char ** argv,const char * optstring,const struct option * longopts,int * longind,int long_only,int posixly_correct)1128 _getopt_internal (int argc, char **argv, const char *optstring,
1129 const struct option *longopts, int *longind, int long_only,
1130 int posixly_correct)
1131 {
1132 int result;
1133
1134 getopt_data.optind = optind;
1135 getopt_data.opterr = opterr;
1136
1137 result = _getopt_internal_r (argc, argv, optstring, longopts,
1138 longind, long_only, &getopt_data,
1139 posixly_correct);
1140
1141 optind = getopt_data.optind;
1142 optarg = getopt_data.optarg;
1143 optopt = getopt_data.optopt;
1144
1145 return result;
1146 }
1147
1148 /* glibc gets a LSB-compliant getopt.
1149 Standalone applications get a POSIX-compliant getopt. */
1150 #if _LIBC
1151 enum { POSIXLY_CORRECT = 0 };
1152 #else
1153 enum { POSIXLY_CORRECT = 1 };
1154 #endif
1155
1156 int
getopt(int argc,char * const * argv,const char * optstring)1157 getopt (int argc, char *const *argv, const char *optstring)
1158 {
1159 return _getopt_internal (argc, (char **) argv, optstring,
1160 (const struct option *) 0,
1161 (int *) 0,
1162 0, POSIXLY_CORRECT);
1163 }
1164
1165 #ifdef _LIBC
1166 int
__posix_getopt(int argc,char * const * argv,const char * optstring)1167 __posix_getopt (int argc, char *const *argv, const char *optstring)
1168 {
1169 return _getopt_internal (argc, argv, optstring,
1170 (const struct option *) 0,
1171 (int *) 0,
1172 0, 1);
1173 }
1174 #endif
1175
1176
1177 #ifdef TEST
1178
1179 /* Compile with -DTEST to make an executable for use in testing
1180 the above definition of 'getopt'. */
1181
1182 int
main(int argc,char ** argv)1183 main (int argc, char **argv)
1184 {
1185 int c;
1186 int digit_optind = 0;
1187
1188 while (1)
1189 {
1190 int this_option_optind = optind ? optind : 1;
1191
1192 c = getopt (argc, argv, "abc:d:0123456789");
1193 if (c == -1)
1194 break;
1195
1196 switch (c)
1197 {
1198 case '0':
1199 case '1':
1200 case '2':
1201 case '3':
1202 case '4':
1203 case '5':
1204 case '6':
1205 case '7':
1206 case '8':
1207 case '9':
1208 if (digit_optind != 0 && digit_optind != this_option_optind)
1209 printf ("digits occur in two different argv-elements.\n");
1210 digit_optind = this_option_optind;
1211 printf ("option %c\n", c);
1212 break;
1213
1214 case 'a':
1215 printf ("option a\n");
1216 break;
1217
1218 case 'b':
1219 printf ("option b\n");
1220 break;
1221
1222 case 'c':
1223 printf ("option c with value '%s'\n", optarg);
1224 break;
1225
1226 case '?':
1227 break;
1228
1229 default:
1230 printf ("?? getopt returned character code 0%o ??\n", c);
1231 }
1232 }
1233
1234 if (optind < argc)
1235 {
1236 printf ("non-option ARGV-elements: ");
1237 while (optind < argc)
1238 printf ("%s ", argv[optind++]);
1239 printf ("\n");
1240 }
1241
1242 exit (0);
1243 }
1244
1245 #endif /* TEST */
1246