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 roland@gnu.ai.mit.edu
4 before changing it!
5
6 Copyright (C) 1987, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97
7 Free Software Foundation, Inc.
8
9 The GNU C Library is free software; you can redistribute it and/or
10 modify it under the terms of the GNU Library General Public License as
11 published by the Free Software Foundation; either version 2 of the
12 License, or (at your option) any later version.
13
14 The GNU C Library 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 GNU
17 Library General Public License for more details.
18
19 You should have received a copy of the GNU Library General Public
20 License along with the GNU C Library; see the file COPYING.LIB. If not,
21 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
23
24 /* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>.
25 Ditto for AIX 3.2 and <stdlib.h>. */
26 #ifndef _NO_PROTO
27 #define _NO_PROTO
28 #endif
29
30 #if !defined (__STDC__) || !__STDC__
31 /* This is a separate conditional since some stdc systems
32 reject `defined (const)'. */
33 #ifndef const
34 #define const
35 #endif
36 #endif
37
38 #include <stdio.h>
39
40 /* Comment out all this code if we are using the GNU C Library, and are not
41 actually compiling the library itself. This code is part of the GNU C
42 Library, but also included in many other GNU distributions. Compiling
43 and linking in this code is a waste when using the GNU C library
44 (especially if it is a shared library). Rather than having every GNU
45 program understand `configure --with-gnu-libc' and omit the object files,
46 it is simpler to just do this in the source for each such file. */
47
48 #define GETOPT_INTERFACE_VERSION 2
49 #if !defined (_LIBC) && defined (__GLIBC__) && __GLIBC__ >= 2
50 #include <gnu-versions.h>
51 #if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
52 #define ELIDE_CODE
53 #endif
54 #endif
55
56 #ifndef ELIDE_CODE
57
58 /* This needs to come after some library #include
59 to get __GNU_LIBRARY__ defined. */
60 #ifdef __GNU_LIBRARY__
61 /* Don't include stdlib.h for non-GNU C libraries because some of them
62 contain conflicting prototypes for getopt. */
63 #include <stdlib.h>
64 #include <unistd.h>
65 #endif /* GNU C library. */
66
67 #ifdef VMS
68 #include <unixlib.h>
69 #endif
70 /*#ifdef HAVE_STRING_H*/
71 #include <string.h>
72 /*#endif*/
73
74 #if defined(_WIN32) && !defined(__CYGWIN32__)
75 /* It's not Unix, really. See? Capital letters. */
76 #include <windows.h>
77 #define getpid() GetCurrentProcessId()
78 #endif
79
80 #ifndef _
81 /* This is for other GNU distributions with internationalized messages.
82 When compiling libc, the _ macro is predefined. */
83 #ifdef HAVE_LIBINTL_H
84 # include <libintl.h>
85 # define _(msgid) gettext (msgid)
86 #else
87 # define _(msgid) (msgid)
88 #endif
89 #endif
90
91 #if defined(__OS2__)||defined(__EMX__)||defined(sun)||defined(__DJGPP__)
92 #include <string.h>
93 #endif
94
95 /* This version of `getopt' appears to the caller like standard Unix `getopt'
96 but it behaves differently for the user, since it allows the user
97 to intersperse the options with the other arguments.
98
99 As `getopt' works, it permutes the elements of ARGV so that,
100 when it is done, all the options precede everything else. Thus
101 all application programs are extended to handle flexible argument order.
102
103 Setting the environment variable POSIXLY_CORRECT disables permutation.
104 Then the behavior is completely standard.
105
106 GNU application programs can use a third alternative mode in which
107 they can distinguish the relative order of options and other arguments. */
108
109 #include "mgetopt.h"
110
111 /* For communication from `getopt' to the caller.
112 When `getopt' finds an option that takes an argument,
113 the argument value is returned here.
114 Also, when `ordering' is RETURN_IN_ORDER,
115 each non-option ARGV-element is returned here. */
116
117 char *optarg = NULL;
118
119 /* Index in ARGV of the next element to be scanned.
120 This is used for communication to and from the caller
121 and for communication between successive calls to `getopt'.
122
123 On entry to `getopt', zero means this is the first call; initialize.
124
125 When `getopt' returns -1, this is the index of the first of the
126 non-option elements that the caller should itself scan.
127
128 Otherwise, `optind' communicates from one call to the next
129 how much of ARGV has been scanned so far. */
130
131 /* 1003.2 says this must be 1 before any call. */
132 int optind = 1;
133
134 /* Formerly, initialization of getopt depended on optind==0, which
135 causes problems with re-calling getopt as programs generally don't
136 know that. */
137
138 int __getopt_initialized = 0;
139
140 /* The next char to be scanned in the option-element
141 in which the last option character we returned was found.
142 This allows us to pick up the scan where we left off.
143
144 If this is zero, or a null string, it means resume the scan
145 by advancing to the next ARGV-element. */
146
147 static char *nextchar;
148
149 /* Callers store zero here to inhibit the error message
150 for unrecognized options. */
151
152 int opterr = 1;
153
154 /* Set to an option character which was unrecognized.
155 This must be initialized on some systems to avoid linking in the
156 system's own getopt implementation. */
157
158 int optopt = '?';
159
160 /* Describe how to deal with options that follow non-option ARGV-elements.
161
162 If the caller did not specify anything,
163 the default is REQUIRE_ORDER if the environment variable
164 POSIXLY_CORRECT is defined, PERMUTE otherwise.
165
166 REQUIRE_ORDER means don't recognize them as options;
167 stop option processing when the first non-option is seen.
168 This is what Unix does.
169 This mode of operation is selected by either setting the environment
170 variable POSIXLY_CORRECT, or using `+' as the first character
171 of the list of option characters.
172
173 PERMUTE is the default. We permute the contents of ARGV as we scan,
174 so that eventually all the non-options are at the end. This allows options
175 to be given in any order, even with programs that were not written to
176 expect this.
177
178 RETURN_IN_ORDER is an option available to programs that were written
179 to expect options and other ARGV-elements in any order and that care about
180 the ordering of the two. We describe each non-option ARGV-element
181 as if it were the argument of an option with character code 1.
182 Using `-' as the first character of the list of option characters
183 selects this mode of operation.
184
185 The special argument `--' forces an end of option-scanning regardless
186 of the value of `ordering'. In the case of RETURN_IN_ORDER, only
187 `--' can cause `getopt' to return -1 with `optind' != ARGC. */
188
189 static enum
190 {
191 REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
192 } ordering;
193
194 /* Value of POSIXLY_CORRECT environment variable. */
195 static char *posixly_correct;
196
197 #ifdef __GNU_LIBRARY__
198 /* We want to avoid inclusion of string.h with non-GNU libraries
199 because there are many ways it can cause trouble.
200 On some systems, it contains special magic macros that don't work
201 in GCC. */
202 #include <string.h>
203 #define my_index strchr
204 #else
205
206 /* Avoid depending on library functions or files
207 whose names are inconsistent. */
208
209 char *getenv ();
210
211 static char *
my_index(str,chr)212 my_index (str, chr)
213 const char *str;
214 int chr;
215 {
216 while (*str)
217 {
218 if (*str == chr)
219 return (char *) str;
220 str++;
221 }
222 return 0;
223 }
224
225 /* If using GCC, we can safely declare strlen this way.
226 If not using GCC, it is ok not to declare it. */
227 #ifdef __GNUC__
228 /* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h.
229 That was relevant to code that was here before. */
230 #if !defined (__STDC__) || !__STDC__
231 /* gcc with -traditional declares the built-in strlen to return int,
232 and has done so at least since version 2.4.5. -- rms. */
233 extern int strlen (const char *);
234 #endif /* not __STDC__ */
235 #endif /* __GNUC__ */
236
237 #endif /* not __GNU_LIBRARY__ */
238
239 /* Handle permutation of arguments. */
240
241 /* Describe the part of ARGV that contains non-options that have
242 been skipped. `first_nonopt' is the index in ARGV of the first of them;
243 `last_nonopt' is the index after the last of them. */
244
245 static int first_nonopt;
246 static int last_nonopt;
247
248 #ifdef _LIBC
249 /* Bash 2.0 gives us an environment variable containing flags
250 indicating ARGV elements that should not be considered arguments. */
251
252 /* Defined in getopt_init.c */
253 extern char *__getopt_nonoption_flags;
254
255 static int nonoption_flags_max_len;
256 static int nonoption_flags_len;
257
258 static int original_argc;
259 static char *const *original_argv;
260
261 extern pid_t __libc_pid;
262
263 /* Make sure the environment variable bash 2.0 puts in the environment
264 is valid for the getopt call we must make sure that the ARGV passed
265 to getopt is that one passed to the process. */
266 static void
267 __attribute__ ((unused))
store_args_and_env(int argc,char * const * argv)268 store_args_and_env (int argc, char *const *argv)
269 {
270 /* XXX This is no good solution. We should rather copy the args so
271 that we can compare them later. But we must not use malloc(3). */
272 original_argc = argc;
273 original_argv = argv;
274 }
275 text_set_element (__libc_subinit, store_args_and_env);
276
277 # define SWAP_FLAGS(ch1, ch2) \
278 if (nonoption_flags_len > 0) \
279 { \
280 char __tmp = __getopt_nonoption_flags[ch1]; \
281 __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \
282 __getopt_nonoption_flags[ch2] = __tmp; \
283 }
284 #else /* !_LIBC */
285 # define SWAP_FLAGS(ch1, ch2)
286 #endif /* _LIBC */
287
288 /* Exchange two adjacent subsequences of ARGV.
289 One subsequence is elements [first_nonopt,last_nonopt)
290 which contains all the non-options that have been skipped so far.
291 The other is elements [last_nonopt,optind), which contains all
292 the options processed since those non-options were skipped.
293
294 `first_nonopt' and `last_nonopt' are relocated so that they describe
295 the new indices of the non-options in ARGV after they are moved. */
296
297 #if defined (__STDC__) && __STDC__
298 static void exchange (char **);
299 #endif
300
301 static void
exchange(argv)302 exchange (argv)
303 char **argv;
304 {
305 int bottom = first_nonopt;
306 int middle = last_nonopt;
307 int top = optind;
308 char *tem;
309
310 /* Exchange the shorter segment with the far end of the longer segment.
311 That puts the shorter segment into the right place.
312 It leaves the longer segment in the right place overall,
313 but it consists of two parts that need to be swapped next. */
314
315 #ifdef _LIBC
316 /* First make sure the handling of the `__getopt_nonoption_flags'
317 string can work normally. Our top argument must be in the range
318 of the string. */
319 if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len)
320 {
321 /* We must extend the array. The user plays games with us and
322 presents new arguments. */
323 char *new_str = malloc (top + 1);
324 if (new_str == NULL)
325 nonoption_flags_len = nonoption_flags_max_len = 0;
326 else
327 {
328 memcpy (new_str, __getopt_nonoption_flags, nonoption_flags_max_len);
329 memset (&new_str[nonoption_flags_max_len], '\0',
330 top + 1 - nonoption_flags_max_len);
331 nonoption_flags_max_len = top + 1;
332 __getopt_nonoption_flags = new_str;
333 }
334 }
335 #endif
336
337 while (top > middle && middle > bottom)
338 {
339 if (top - middle > middle - bottom)
340 {
341 /* Bottom segment is the short one. */
342 int len = middle - bottom;
343 register int i;
344
345 /* Swap it with the top part of the top segment. */
346 for (i = 0; i < len; i++)
347 {
348 tem = argv[bottom + i];
349 argv[bottom + i] = argv[top - (middle - bottom) + i];
350 argv[top - (middle - bottom) + i] = tem;
351 SWAP_FLAGS (bottom + i, top - (middle - bottom) + i);
352 }
353 /* Exclude the moved bottom segment from further swapping. */
354 top -= len;
355 }
356 else
357 {
358 /* Top segment is the short one. */
359 int len = top - middle;
360 register int i;
361
362 /* Swap it with the bottom part of the bottom segment. */
363 for (i = 0; i < len; i++)
364 {
365 tem = argv[bottom + i];
366 argv[bottom + i] = argv[middle + i];
367 argv[middle + i] = tem;
368 SWAP_FLAGS (bottom + i, middle + i);
369 }
370 /* Exclude the moved top segment from further swapping. */
371 bottom += len;
372 }
373 }
374
375 /* Update records for the slots the non-options now occupy. */
376
377 first_nonopt += (optind - last_nonopt);
378 last_nonopt = optind;
379 }
380
381 /* Initialize the internal data when the first call is made. */
382
383 #if defined (__STDC__) && __STDC__
384 static const char *_getopt_initialize (int, char *const *, const char *);
385 #endif
386 static const char *
_getopt_initialize(argc,argv,optstring)387 _getopt_initialize (argc, argv, optstring)
388 int argc;
389 char *const *argv;
390 const char *optstring;
391 {
392 /* Start processing options with ARGV-element 1 (since ARGV-element 0
393 is the program name); the sequence of previously skipped
394 non-option ARGV-elements is empty. */
395
396 first_nonopt = last_nonopt = optind;
397
398 nextchar = NULL;
399
400 posixly_correct = getenv ("POSIXLY_CORRECT");
401
402 /* Determine how to handle the ordering of options and nonoptions. */
403
404 if (optstring[0] == '-')
405 {
406 ordering = RETURN_IN_ORDER;
407 ++optstring;
408 }
409 else if (optstring[0] == '+')
410 {
411 ordering = REQUIRE_ORDER;
412 ++optstring;
413 }
414 else if (posixly_correct != NULL)
415 ordering = REQUIRE_ORDER;
416 else
417 ordering = PERMUTE;
418
419 #ifdef _LIBC
420 if (posixly_correct == NULL
421 && argc == original_argc && argv == original_argv)
422 {
423 if (nonoption_flags_max_len == 0)
424 {
425 if (__getopt_nonoption_flags == NULL
426 || __getopt_nonoption_flags[0] == '\0')
427 nonoption_flags_max_len = -1;
428 else
429 {
430 const char *orig_str = __getopt_nonoption_flags;
431 int len = nonoption_flags_max_len = strlen (orig_str);
432 if (nonoption_flags_max_len < argc)
433 nonoption_flags_max_len = argc;
434 __getopt_nonoption_flags =
435 (char *) malloc (nonoption_flags_max_len);
436 if (__getopt_nonoption_flags == NULL)
437 nonoption_flags_max_len = -1;
438 else
439 {
440 memcpy (__getopt_nonoption_flags, orig_str, len);
441 memset (&__getopt_nonoption_flags[len], '\0',
442 nonoption_flags_max_len - len);
443 }
444 }
445 }
446 nonoption_flags_len = nonoption_flags_max_len;
447 }
448 else
449 nonoption_flags_len = 0;
450 #endif
451
452 return optstring;
453 }
454
455 /* Scan elements of ARGV (whose length is ARGC) for option characters
456 given in OPTSTRING.
457
458 If an element of ARGV starts with '-', and is not exactly "-" or "--",
459 then it is an option element. The characters of this element
460 (aside from the initial '-') are option characters. If `getopt'
461 is called repeatedly, it returns successively each of the option characters
462 from each of the option elements.
463
464 If `getopt' finds another option character, it returns that character,
465 updating `optind' and `nextchar' so that the next call to `getopt' can
466 resume the scan with the following option character or ARGV-element.
467
468 If there are no more option characters, `getopt' returns -1.
469 Then `optind' is the index in ARGV of the first ARGV-element
470 that is not an option. (The ARGV-elements have been permuted
471 so that those that are not options now come last.)
472
473 OPTSTRING is a string containing the legitimate option characters.
474 If an option character is seen that is not listed in OPTSTRING,
475 return '?' after printing an error message. If you set `opterr' to
476 zero, the error message is suppressed but we still return '?'.
477
478 If a char in OPTSTRING is followed by a colon, that means it wants an arg,
479 so the following text in the same ARGV-element, or the text of the following
480 ARGV-element, is returned in `optarg'. Two colons mean an option that
481 wants an optional arg; if there is text in the current ARGV-element,
482 it is returned in `optarg', otherwise `optarg' is set to zero.
483
484 If OPTSTRING starts with `-' or `+', it requests different methods of
485 handling the non-option ARGV-elements.
486 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
487
488 Long-named options begin with `--' instead of `-'.
489 Their names may be abbreviated as long as the abbreviation is unique
490 or is an exact match for some defined option. If they have an
491 argument, it follows the option name in the same ARGV-element, separated
492 from the option name by a `=', or else the in next ARGV-element.
493 When `getopt' finds a long-named option, it returns 0 if that option's
494 `flag' field is nonzero, the value of the option's `val' field
495 if the `flag' field is zero.
496
497 The elements of ARGV aren't really const, because we permute them.
498 But we pretend they're const in the prototype to be compatible
499 with other systems.
500
501 LONGOPTS is a vector of `struct option' terminated by an
502 element containing a name which is zero.
503
504 LONGIND returns the index in LONGOPT of the long-named option found.
505 It is only valid when a long-named option has been found by the most
506 recent call.
507
508 If LONG_ONLY is nonzero, '-' as well as '--' can introduce
509 long-named options. */
510
511 int
_getopt_internal(argc,argv,optstring,longopts,longind,long_only)512 _getopt_internal (argc, argv, optstring, longopts, longind, long_only)
513 int argc;
514 char *const *argv;
515 const char *optstring;
516 const struct option *longopts;
517 int *longind;
518 int long_only;
519 {
520 optarg = NULL;
521
522 if (optind == 0 || !__getopt_initialized)
523 {
524 if (optind == 0)
525 optind = 1; /* Don't scan ARGV[0], the program name. */
526 optstring = _getopt_initialize (argc, argv, optstring);
527 __getopt_initialized = 1;
528 }
529
530 /* Test whether ARGV[optind] points to a non-option argument.
531 Either it does not have option syntax, or there is an environment flag
532 from the shell indicating it is not an option. The later information
533 is only used when the used in the GNU libc. */
534 #ifdef _LIBC
535 #define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \
536 || (optind < nonoption_flags_len \
537 && __getopt_nonoption_flags[optind] == '1'))
538 #else
539 #define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0')
540 #endif
541
542 if (nextchar == NULL || *nextchar == '\0')
543 {
544 /* Advance to the next ARGV-element. */
545
546 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been
547 moved back by the user (who may also have changed the arguments). */
548 if (last_nonopt > optind)
549 last_nonopt = optind;
550 if (first_nonopt > optind)
551 first_nonopt = optind;
552
553 if (ordering == PERMUTE)
554 {
555 /* If we have just processed some options following some non-options,
556 exchange them so that the options come first. */
557
558 if (first_nonopt != last_nonopt && last_nonopt != optind)
559 exchange ((char **) argv);
560 else if (last_nonopt != optind)
561 first_nonopt = optind;
562
563 /* Skip any additional non-options
564 and extend the range of non-options previously skipped. */
565
566 while (optind < argc && NONOPTION_P)
567 optind++;
568 last_nonopt = optind;
569 }
570
571 /* The special ARGV-element `--' means premature end of options.
572 Skip it like a null option,
573 then exchange with previous non-options as if it were an option,
574 then skip everything else like a non-option. */
575
576 if (optind != argc && !strcmp (argv[optind], "--"))
577 {
578 optind++;
579
580 if (first_nonopt != last_nonopt && last_nonopt != optind)
581 exchange ((char **) argv);
582 else if (first_nonopt == last_nonopt)
583 first_nonopt = optind;
584 last_nonopt = argc;
585
586 optind = argc;
587 }
588
589 /* If we have done all the ARGV-elements, stop the scan
590 and back over any non-options that we skipped and permuted. */
591
592 if (optind == argc)
593 {
594 /* Set the next-arg-index to point at the non-options
595 that we previously skipped, so the caller will digest them. */
596 if (first_nonopt != last_nonopt)
597 optind = first_nonopt;
598 return -1;
599 }
600
601 /* If we have come to a non-option and did not permute it,
602 either stop the scan or describe it to the caller and pass it by. */
603
604 if (NONOPTION_P)
605 {
606 if (ordering == REQUIRE_ORDER)
607 return -1;
608 optarg = argv[optind++];
609 return 1;
610 }
611
612 /* We have found another option-ARGV-element.
613 Skip the initial punctuation. */
614
615 nextchar = (argv[optind] + 1
616 + (longopts != NULL && argv[optind][1] == '-'));
617 }
618
619 /* Decode the current option-ARGV-element. */
620
621 /* Check whether the ARGV-element is a long option.
622
623 If long_only and the ARGV-element has the form "-f", where f is
624 a valid short option, don't consider it an abbreviated form of
625 a long option that starts with f. Otherwise there would be no
626 way to give the -f short option.
627
628 On the other hand, if there's a long option "fubar" and
629 the ARGV-element is "-fu", do consider that an abbreviation of
630 the long option, just like "--fu", and not "-f" with arg "u".
631
632 This distinction seems to be the most useful approach. */
633
634 if (longopts != NULL
635 && (argv[optind][1] == '-'
636 || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1])))))
637 {
638 char *nameend;
639 const struct option *p;
640 const struct option *pfound = NULL;
641 int exact = 0;
642 int ambig = 0;
643 int indfound = -1;
644 int option_index;
645
646 for (nameend = nextchar; *nameend && *nameend != '='; nameend++)
647 /* Do nothing. */ ;
648
649 /* Test all long options for either exact match
650 or abbreviated matches. */
651 for (p = longopts, option_index = 0; p->name; p++, option_index++)
652 if (!strncmp (p->name, nextchar, nameend - nextchar))
653 {
654 if ((unsigned int) (nameend - nextchar)
655 == (unsigned int) strlen (p->name))
656 {
657 /* Exact match found. */
658 pfound = p;
659 indfound = option_index;
660 exact = 1;
661 break;
662 }
663 else if (pfound == NULL)
664 {
665 /* First nonexact match found. */
666 pfound = p;
667 indfound = option_index;
668 }
669 else
670 /* Second or later nonexact match found. */
671 ambig = 1;
672 }
673
674 if (ambig && !exact)
675 {
676 if (opterr)
677 fprintf (stderr, _("%s: option `%s' is ambiguous\n"),
678 argv[0], argv[optind]);
679 nextchar += strlen (nextchar);
680 optind++;
681 optopt = 0;
682 return '?';
683 }
684
685 if (pfound != NULL)
686 {
687 option_index = indfound;
688 optind++;
689 if (*nameend)
690 {
691 /* Don't test has_arg with >, because some C compilers don't
692 allow it to be used on enums. */
693 if (pfound->has_arg)
694 optarg = nameend + 1;
695 else
696 {
697 if (opterr) {
698 if (argv[optind - 1][1] == '-')
699 /* --option */
700 fprintf (stderr,
701 _("%s: option `--%s' doesn't allow an argument\n"),
702 argv[0], pfound->name);
703 else
704 /* +option or -option */
705 fprintf (stderr,
706 _("%s: option `%c%s' doesn't allow an argument\n"),
707 argv[0], argv[optind - 1][0], pfound->name);
708 }
709
710 nextchar += strlen (nextchar);
711
712 optopt = pfound->val;
713 return '?';
714 }
715 }
716 else if (pfound->has_arg == 1)
717 {
718 if (optind < argc)
719 optarg = argv[optind++];
720 else
721 {
722 if (opterr)
723 fprintf (stderr,
724 _("%s: option `%s' requires an argument\n"),
725 argv[0], argv[optind - 1]);
726 nextchar += strlen (nextchar);
727 optopt = pfound->val;
728 return optstring[0] == ':' ? ':' : '?';
729 }
730 }
731 nextchar += strlen (nextchar);
732 if (longind != NULL)
733 *longind = option_index;
734 if (pfound->flag)
735 {
736 *(pfound->flag) = pfound->val;
737 return 0;
738 }
739 return pfound->val;
740 }
741
742 /* Can't find it as a long option. If this is not getopt_long_only,
743 or the option starts with '--' or is not a valid short
744 option, then it's an error.
745 Otherwise interpret it as a short option. */
746 if (!long_only || argv[optind][1] == '-'
747 || my_index (optstring, *nextchar) == NULL)
748 {
749 if (opterr)
750 {
751 if (argv[optind][1] == '-')
752 /* --option */
753 fprintf (stderr, _("%s: unrecognized option `--%s'\n"),
754 argv[0], nextchar);
755 else
756 /* +option or -option */
757 fprintf (stderr, _("%s: unrecognized option `%c%s'\n"),
758 argv[0], argv[optind][0], nextchar);
759 }
760 nextchar = (char *) "";
761 optind++;
762 optopt = 0;
763 return '?';
764 }
765 }
766
767 /* Look at and handle the next short option-character. */
768
769 {
770 char c = *nextchar++;
771 char *temp = my_index (optstring, c);
772
773 /* Increment `optind' when we start to process its last character. */
774 if (*nextchar == '\0')
775 ++optind;
776
777 if (temp == NULL || c == ':')
778 {
779 if (opterr)
780 {
781 if (posixly_correct)
782 /* 1003.2 specifies the format of this message. */
783 fprintf (stderr, _("%s: illegal option -- %c\n"),
784 argv[0], c);
785 else
786 fprintf (stderr, _("%s: invalid option -- %c\n"),
787 argv[0], c);
788 }
789 optopt = c;
790 return '?';
791 }
792 /* Convenience. Treat POSIX -W foo same as long option --foo */
793 if (temp[0] == 'W' && temp[1] == ';')
794 {
795 char *nameend;
796 const struct option *p;
797 const struct option *pfound = NULL;
798 int exact = 0;
799 int ambig = 0;
800 int indfound = 0;
801 int option_index;
802
803 /* This is an option that requires an argument. */
804 if (*nextchar != '\0')
805 {
806 optarg = nextchar;
807 /* If we end this ARGV-element by taking the rest as an arg,
808 we must advance to the next element now. */
809 optind++;
810 }
811 else if (optind == argc)
812 {
813 if (opterr)
814 {
815 /* 1003.2 specifies the format of this message. */
816 fprintf (stderr, _("%s: option requires an argument -- %c\n"),
817 argv[0], c);
818 }
819 optopt = c;
820 if (optstring[0] == ':')
821 c = ':';
822 else
823 c = '?';
824 return c;
825 }
826 else
827 /* We already incremented `optind' once;
828 increment it again when taking next ARGV-elt as argument. */
829 optarg = argv[optind++];
830
831 /* optarg is now the argument, see if it's in the
832 table of longopts. */
833
834 for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++)
835 /* Do nothing. */ ;
836
837 /* Test all long options for either exact match
838 or abbreviated matches. */
839 for (p = longopts, option_index = 0; p->name; p++, option_index++)
840 if (!strncmp (p->name, nextchar, nameend - nextchar))
841 {
842 if ((unsigned int) (nameend - nextchar) == strlen (p->name))
843 {
844 /* Exact match found. */
845 pfound = p;
846 indfound = option_index;
847 exact = 1;
848 break;
849 }
850 else if (pfound == NULL)
851 {
852 /* First nonexact match found. */
853 pfound = p;
854 indfound = option_index;
855 }
856 else
857 /* Second or later nonexact match found. */
858 ambig = 1;
859 }
860 if (ambig && !exact)
861 {
862 if (opterr)
863 fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"),
864 argv[0], argv[optind]);
865 nextchar += strlen (nextchar);
866 optind++;
867 return '?';
868 }
869 if (pfound != NULL)
870 {
871 option_index = indfound;
872 if (*nameend)
873 {
874 /* Don't test has_arg with >, because some C compilers don't
875 allow it to be used on enums. */
876 if (pfound->has_arg)
877 optarg = nameend + 1;
878 else
879 {
880 if (opterr)
881 fprintf (stderr, _("\
882 %s: option `-W %s' doesn't allow an argument\n"),
883 argv[0], pfound->name);
884
885 nextchar += strlen (nextchar);
886 return '?';
887 }
888 }
889 else if (pfound->has_arg == 1)
890 {
891 if (optind < argc)
892 optarg = argv[optind++];
893 else
894 {
895 if (opterr)
896 fprintf (stderr,
897 _("%s: option `%s' requires an argument\n"),
898 argv[0], argv[optind - 1]);
899 nextchar += strlen (nextchar);
900 return optstring[0] == ':' ? ':' : '?';
901 }
902 }
903 nextchar += strlen (nextchar);
904 if (longind != NULL)
905 *longind = option_index;
906 if (pfound->flag)
907 {
908 *(pfound->flag) = pfound->val;
909 return 0;
910 }
911 return pfound->val;
912 }
913 nextchar = NULL;
914 return 'W'; /* Let the application handle it. */
915 }
916 if (temp[1] == ':')
917 {
918 if (temp[2] == ':')
919 {
920 /* This is an option that accepts an argument optionally. */
921 if (*nextchar != '\0')
922 {
923 optarg = nextchar;
924 optind++;
925 }
926 else
927 optarg = NULL;
928 nextchar = NULL;
929 }
930 else
931 {
932 /* This is an option that requires an argument. */
933 if (*nextchar != '\0')
934 {
935 optarg = nextchar;
936 /* If we end this ARGV-element by taking the rest as an arg,
937 we must advance to the next element now. */
938 optind++;
939 }
940 else if (optind == argc)
941 {
942 if (opterr)
943 {
944 /* 1003.2 specifies the format of this message. */
945 fprintf (stderr,
946 _("%s: option requires an argument -- %c\n"),
947 argv[0], c);
948 }
949 optopt = c;
950 if (optstring[0] == ':')
951 c = ':';
952 else
953 c = '?';
954 }
955 else
956 /* We already incremented `optind' once;
957 increment it again when taking next ARGV-elt as argument. */
958 optarg = argv[optind++];
959 nextchar = NULL;
960 }
961 }
962 return c;
963 }
964 }
965
966 int
getopt(argc,argv,optstring)967 getopt (argc, argv, optstring)
968 int argc;
969 char *const *argv;
970 const char *optstring;
971 {
972 return _getopt_internal (argc, argv, optstring,
973 (const struct option *) 0,
974 (int *) 0,
975 0);
976 }
977
978 #endif /* Not ELIDE_CODE. */
979
980 #ifdef TEST
981
982 /* Compile with -DTEST to make an executable for use in testing
983 the above definition of `getopt'. */
984
985 int
main(argc,argv)986 main (argc, argv)
987 int argc;
988 char **argv;
989 {
990 int c;
991 int digit_optind = 0;
992
993 while (1)
994 {
995 int this_option_optind = optind ? optind : 1;
996
997 c = getopt (argc, argv, "abc:d:0123456789");
998 if (c == -1)
999 break;
1000
1001 switch (c)
1002 {
1003 case '0':
1004 case '1':
1005 case '2':
1006 case '3':
1007 case '4':
1008 case '5':
1009 case '6':
1010 case '7':
1011 case '8':
1012 case '9':
1013 if (digit_optind != 0 && digit_optind != this_option_optind)
1014 printf ("digits occur in two different argv-elements.\n");
1015 digit_optind = this_option_optind;
1016 printf ("option %c\n", c);
1017 break;
1018
1019 case 'a':
1020 printf ("option a\n");
1021 break;
1022
1023 case 'b':
1024 printf ("option b\n");
1025 break;
1026
1027 case 'c':
1028 printf ("option c with value `%s'\n", optarg);
1029 break;
1030
1031 case '?':
1032 break;
1033
1034 default:
1035 printf ("?? getopt returned character code 0%o ??\n", c);
1036 }
1037 }
1038
1039 if (optind < argc)
1040 {
1041 printf ("non-option ARGV-elements: ");
1042 while (optind < argc)
1043 printf ("%s ", argv[optind++]);
1044 printf ("\n");
1045 }
1046
1047 exit (0);
1048 }
1049
1050 #endif /* TEST */
1051