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Revision 259 - (show annotations)
Mon Nov 7 22:09:10 2005 UTC (14 years, 10 months ago) by frodo
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Imported sources

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 #ifdef HAVE_CONFIG_H
31 #include <config.h>
32 #endif
33
34 #if !defined (__STDC__) || !__STDC__
35 /* This is a separate conditional since some stdc systems
36 reject `defined (const)'. */
37 #ifndef const
38 #define const
39 #endif
40 #endif
41
42 #include <stdio.h>
43
44 /* Comment out all this code if we are using the GNU C Library, and are not
45 actually compiling the library itself. This code is part of the GNU C
46 Library, but also included in many other GNU distributions. Compiling
47 and linking in this code is a waste when using the GNU C library
48 (especially if it is a shared library). Rather than having every GNU
49 program understand `configure --with-gnu-libc' and omit the object files,
50 it is simpler to just do this in the source for each such file. */
51
52 #define GETOPT_INTERFACE_VERSION 2
53 #if !defined (_LIBC) && defined (__GLIBC__) && __GLIBC__ >= 2
54 #include <gnu-versions.h>
55 #if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
56 #define ELIDE_CODE
57 #endif
58 #endif
59
60 #ifndef ELIDE_CODE
61
62
63 /* This needs to come after some library #include
64 to get __GNU_LIBRARY__ defined. */
65 #ifdef __GNU_LIBRARY__
66 /* Don't include stdlib.h for non-GNU C libraries because some of them
67 contain conflicting prototypes for getopt. */
68 #include <stdlib.h>
69 #include <unistd.h>
70 #endif /* GNU C library. */
71
72 #ifdef VMS
73 #include <unixlib.h>
74 #if HAVE_STRING_H - 0
75 #include <string.h>
76 #endif
77 #endif
78
79 #if defined (WIN32) && !defined (__CYGWIN32__)
80 /* It's not Unix, really. See? Capital letters. */
81 #include <windows.h>
82 #define getpid() GetCurrentProcessId()
83 #endif
84
85 #ifndef _
86 /* This is for other GNU distributions with internationalized messages.
87 When compiling libc, the _ macro is predefined. */
88 #ifdef HAVE_LIBINTL_H
89 # include <libintl.h>
90 # define _(msgid) gettext (msgid)
91 #else
92 # define _(msgid) (msgid)
93 #endif
94 #endif
95
96 /* This version of `getopt' appears to the caller like standard Unix `getopt'
97 but it behaves differently for the user, since it allows the user
98 to intersperse the options with the other arguments.
99
100 As `getopt' works, it permutes the elements of ARGV so that,
101 when it is done, all the options precede everything else. Thus
102 all application programs are extended to handle flexible argument order.
103
104 Setting the environment variable POSIXLY_CORRECT disables permutation.
105 Then the behavior is completely standard.
106
107 GNU application programs can use a third alternative mode in which
108 they can distinguish the relative order of options and other arguments. */
109
110 #include "getopt.h"
111
112 /* For communication from `getopt' to the caller.
113 When `getopt' finds an option that takes an argument,
114 the argument value is returned here.
115 Also, when `ordering' is RETURN_IN_ORDER,
116 each non-option ARGV-element is returned here. */
117
118 char *optarg = NULL;
119
120 /* Index in ARGV of the next element to be scanned.
121 This is used for communication to and from the caller
122 and for communication between successive calls to `getopt'.
123
124 On entry to `getopt', zero means this is the first call; initialize.
125
126 When `getopt' returns -1, this is the index of the first of the
127 non-option elements that the caller should itself scan.
128
129 Otherwise, `optind' communicates from one call to the next
130 how much of ARGV has been scanned so far. */
131
132 /* 1003.2 says this must be 1 before any call. */
133 int optind = 1;
134
135 /* Formerly, initialization of getopt depended on optind==0, which
136 causes problems with re-calling getopt as programs generally don't
137 know that. */
138
139 int __getopt_initialized = 0;
140
141 /* The next char to be scanned in the option-element
142 in which the last option character we returned was found.
143 This allows us to pick up the scan where we left off.
144
145 If this is zero, or a null string, it means resume the scan
146 by advancing to the next ARGV-element. */
147
148 static char *nextchar;
149
150 /* Callers store zero here to inhibit the error message
151 for unrecognized options. */
152
153 int opterr = 1;
154
155 /* Set to an option character which was unrecognized.
156 This must be initialized on some systems to avoid linking in the
157 system's own getopt implementation. */
158
159 int optopt = '?';
160
161 /* Describe how to deal with options that follow non-option ARGV-elements.
162
163 If the caller did not specify anything,
164 the default is REQUIRE_ORDER if the environment variable
165 POSIXLY_CORRECT is defined, PERMUTE otherwise.
166
167 REQUIRE_ORDER means don't recognize them as options;
168 stop option processing when the first non-option is seen.
169 This is what Unix does.
170 This mode of operation is selected by either setting the environment
171 variable POSIXLY_CORRECT, or using `+' as the first character
172 of the list of option characters.
173
174 PERMUTE is the default. We permute the contents of ARGV as we scan,
175 so that eventually all the non-options are at the end. This allows options
176 to be given in any order, even with programs that were not written to
177 expect this.
178
179 RETURN_IN_ORDER is an option available to programs that were written
180 to expect options and other ARGV-elements in any order and that care about
181 the ordering of the two. We describe each non-option ARGV-element
182 as if it were the argument of an option with character code 1.
183 Using `-' as the first character of the list of option characters
184 selects this mode of operation.
185
186 The special argument `--' forces an end of option-scanning regardless
187 of the value of `ordering'. In the case of RETURN_IN_ORDER, only
188 `--' can cause `getopt' to return -1 with `optind' != ARGC. */
189
190 static enum
191 {
192 REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
193 } ordering;
194
195 /* Value of POSIXLY_CORRECT environment variable. */
196 static char *posixly_correct;
197
198 #ifdef __GNU_LIBRARY__
199 /* We want to avoid inclusion of string.h with non-GNU libraries
200 because there are many ways it can cause trouble.
201 On some systems, it contains special magic macros that don't work
202 in GCC. */
203 #include <string.h>
204 #define my_index strchr
205 #else
206
207 /* Avoid depending on library functions or files
208 whose names are inconsistent. */
209
210 char *getenv ();
211
212 static char *
213 my_index (str, chr)
214 const char *str;
215 int chr;
216 {
217 while (*str)
218 {
219 if (*str == chr)
220 return (char *) str;
221 str++;
222 }
223 return 0;
224 }
225
226 /* If using GCC, we can safely declare strlen this way.
227 If not using GCC, it is ok not to declare it. */
228 #ifdef __GNUC__
229 /* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h.
230 That was relevant to code that was here before. */
231 #if !defined (__STDC__) || !__STDC__
232 /* gcc with -traditional declares the built-in strlen to return int,
233 and has done so at least since version 2.4.5. -- rms. */
234 extern int strlen (const char *);
235 #endif /* not __STDC__ */
236 #endif /* __GNUC__ */
237
238 #endif /* not __GNU_LIBRARY__ */
239
240 /* Handle permutation of arguments. */
241
242 /* Describe the part of ARGV that contains non-options that have
243 been skipped. `first_nonopt' is the index in ARGV of the first of them;
244 `last_nonopt' is the index after the last of them. */
245
246 static int first_nonopt;
247 static int last_nonopt;
248
249 #ifdef _LIBC
250 /* Bash 2.0 gives us an environment variable containing flags
251 indicating ARGV elements that should not be considered arguments. */
252
253 /* Defined in getopt_init.c */
254 extern char *__getopt_nonoption_flags;
255
256 static int nonoption_flags_max_len;
257 static int nonoption_flags_len;
258
259 static int original_argc;
260 static char *const *original_argv;
261
262 extern pid_t __libc_pid;
263
264 /* Make sure the environment variable bash 2.0 puts in the environment
265 is valid for the getopt call we must make sure that the ARGV passed
266 to getopt is that one passed to the process. */
267 static void
268 __attribute__ ((unused))
269 store_args_and_env (int argc, char *const *argv)
270 {
271 /* XXX This is no good solution. We should rather copy the args so
272 that we can compare them later. But we must not use malloc(3). */
273 original_argc = argc;
274 original_argv = argv;
275 }
276 text_set_element (__libc_subinit, store_args_and_env);
277
278 # define SWAP_FLAGS(ch1, ch2) \
279 if (nonoption_flags_len > 0) \
280 { \
281 char __tmp = __getopt_nonoption_flags[ch1]; \
282 __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \
283 __getopt_nonoption_flags[ch2] = __tmp; \
284 }
285 #else /* !_LIBC */
286 # define SWAP_FLAGS(ch1, ch2)
287 #endif /* _LIBC */
288
289 /* Exchange two adjacent subsequences of ARGV.
290 One subsequence is elements [first_nonopt,last_nonopt)
291 which contains all the non-options that have been skipped so far.
292 The other is elements [last_nonopt,optind), which contains all
293 the options processed since those non-options were skipped.
294
295 `first_nonopt' and `last_nonopt' are relocated so that they describe
296 the new indices of the non-options in ARGV after they are moved. */
297
298 #if defined (__STDC__) && __STDC__
299 static void exchange (char **);
300 #endif
301
302 static void
303 exchange (argv)
304 char **argv;
305 {
306 int bottom = first_nonopt;
307 int middle = last_nonopt;
308 int top = optind;
309 char *tem;
310
311 /* Exchange the shorter segment with the far end of the longer segment.
312 That puts the shorter segment into the right place.
313 It leaves the longer segment in the right place overall,
314 but it consists of two parts that need to be swapped next. */
315
316 #ifdef _LIBC
317 /* First make sure the handling of the `__getopt_nonoption_flags'
318 string can work normally. Our top argument must be in the range
319 of the string. */
320 if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len)
321 {
322 /* We must extend the array. The user plays games with us and
323 presents new arguments. */
324 char *new_str = malloc (top + 1);
325 if (new_str == NULL)
326 nonoption_flags_len = nonoption_flags_max_len = 0;
327 else
328 {
329 memcpy (new_str, __getopt_nonoption_flags, nonoption_flags_max_len);
330 memset (&new_str[nonoption_flags_max_len], '\0',
331 top + 1 - nonoption_flags_max_len);
332 nonoption_flags_max_len = top + 1;
333 __getopt_nonoption_flags = new_str;
334 }
335 }
336 #endif
337
338 while (top > middle && middle > bottom)
339 {
340 if (top - middle > middle - bottom)
341 {
342 /* Bottom segment is the short one. */
343 int len = middle - bottom;
344 register int i;
345
346 /* Swap it with the top part of the top segment. */
347 for (i = 0; i < len; i++)
348 {
349 tem = argv[bottom + i];
350 argv[bottom + i] = argv[top - (middle - bottom) + i];
351 argv[top - (middle - bottom) + i] = tem;
352 SWAP_FLAGS (bottom + i, top - (middle - bottom) + i);
353 }
354 /* Exclude the moved bottom segment from further swapping. */
355 top -= len;
356 }
357 else
358 {
359 /* Top segment is the short one. */
360 int len = top - middle;
361 register int i;
362
363 /* Swap it with the bottom part of the bottom segment. */
364 for (i = 0; i < len; i++)
365 {
366 tem = argv[bottom + i];
367 argv[bottom + i] = argv[middle + i];
368 argv[middle + i] = tem;
369 SWAP_FLAGS (bottom + i, middle + i);
370 }
371 /* Exclude the moved top segment from further swapping. */
372 bottom += len;
373 }
374 }
375
376 /* Update records for the slots the non-options now occupy. */
377
378 first_nonopt += (optind - last_nonopt);
379 last_nonopt = optind;
380 }
381
382 /* Initialize the internal data when the first call is made. */
383
384 #if defined (__STDC__) && __STDC__
385 static const char *_getopt_initialize (int, char *const *, const char *);
386 #endif
387 static const char *
388 _getopt_initialize (argc, argv, optstring)
389 int argc;
390 char *const *argv;
391 const char *optstring;
392 {
393 /* Start processing options with ARGV-element 1 (since ARGV-element 0
394 is the program name); the sequence of previously skipped
395 non-option ARGV-elements is empty. */
396
397 first_nonopt = last_nonopt = optind;
398
399 nextchar = NULL;
400
401 posixly_correct = getenv ("POSIXLY_CORRECT");
402
403 /* Determine how to handle the ordering of options and nonoptions. */
404
405 if (optstring[0] == '-')
406 {
407 ordering = RETURN_IN_ORDER;
408 ++optstring;
409 }
410 else if (optstring[0] == '+')
411 {
412 ordering = REQUIRE_ORDER;
413 ++optstring;
414 }
415 else if (posixly_correct != NULL)
416 ordering = REQUIRE_ORDER;
417 else
418 ordering = PERMUTE;
419
420 #ifdef _LIBC
421 if (posixly_correct == NULL
422 && argc == original_argc && argv == original_argv)
423 {
424 if (nonoption_flags_max_len == 0)
425 {
426 if (__getopt_nonoption_flags == NULL
427 || __getopt_nonoption_flags[0] == '\0')
428 nonoption_flags_max_len = -1;
429 else
430 {
431 const char *orig_str = __getopt_nonoption_flags;
432 int len = nonoption_flags_max_len = strlen (orig_str);
433 if (nonoption_flags_max_len < argc)
434 nonoption_flags_max_len = argc;
435 __getopt_nonoption_flags =
436 (char *) malloc (nonoption_flags_max_len);
437 if (__getopt_nonoption_flags == NULL)
438 nonoption_flags_max_len = -1;
439 else
440 {
441 memcpy (__getopt_nonoption_flags, orig_str, len);
442 memset (&__getopt_nonoption_flags[len], '\0',
443 nonoption_flags_max_len - len);
444 }
445 }
446 }
447 nonoption_flags_len = nonoption_flags_max_len;
448 }
449 else
450 nonoption_flags_len = 0;
451 #endif
452
453 return optstring;
454 }
455
456 /* Scan elements of ARGV (whose length is ARGC) for option characters
457 given in OPTSTRING.
458
459 If an element of ARGV starts with '-', and is not exactly "-" or "--",
460 then it is an option element. The characters of this element
461 (aside from the initial '-') are option characters. If `getopt'
462 is called repeatedly, it returns successively each of the option characters
463 from each of the option elements.
464
465 If `getopt' finds another option character, it returns that character,
466 updating `optind' and `nextchar' so that the next call to `getopt' can
467 resume the scan with the following option character or ARGV-element.
468
469 If there are no more option characters, `getopt' returns -1.
470 Then `optind' is the index in ARGV of the first ARGV-element
471 that is not an option. (The ARGV-elements have been permuted
472 so that those that are not options now come last.)
473
474 OPTSTRING is a string containing the legitimate option characters.
475 If an option character is seen that is not listed in OPTSTRING,
476 return '?' after printing an error message. If you set `opterr' to
477 zero, the error message is suppressed but we still return '?'.
478
479 If a char in OPTSTRING is followed by a colon, that means it wants an arg,
480 so the following text in the same ARGV-element, or the text of the following
481 ARGV-element, is returned in `optarg'. Two colons mean an option that
482 wants an optional arg; if there is text in the current ARGV-element,
483 it is returned in `optarg', otherwise `optarg' is set to zero.
484
485 If OPTSTRING starts with `-' or `+', it requests different methods of
486 handling the non-option ARGV-elements.
487 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
488
489 Long-named options begin with `--' instead of `-'.
490 Their names may be abbreviated as long as the abbreviation is unique
491 or is an exact match for some defined option. If they have an
492 argument, it follows the option name in the same ARGV-element, separated
493 from the option name by a `=', or else the in next ARGV-element.
494 When `getopt' finds a long-named option, it returns 0 if that option's
495 `flag' field is nonzero, the value of the option's `val' field
496 if the `flag' field is zero.
497
498 The elements of ARGV aren't really const, because we permute them.
499 But we pretend they're const in the prototype to be compatible
500 with other systems.
501
502 LONGOPTS is a vector of `struct option' terminated by an
503 element containing a name which is zero.
504
505 LONGIND returns the index in LONGOPT of the long-named option found.
506 It is only valid when a long-named option has been found by the most
507 recent call.
508
509 If LONG_ONLY is nonzero, '-' as well as '--' can introduce
510 long-named options. */
511
512 int
513 _getopt_internal (argc, argv, optstring, longopts, longind, long_only)
514 int argc;
515 char *const *argv;
516 const char *optstring;
517 const struct option *longopts;
518 int *longind;
519 int long_only;
520 {
521 optarg = NULL;
522
523 if (optind == 0 || !__getopt_initialized)
524 {
525 if (optind == 0)
526 optind = 1; /* Don't scan ARGV[0], the program name. */
527 optstring = _getopt_initialize (argc, argv, optstring);
528 __getopt_initialized = 1;
529 }
530
531 /* Test whether ARGV[optind] points to a non-option argument.
532 Either it does not have option syntax, or there is an environment flag
533 from the shell indicating it is not an option. The later information
534 is only used when the used in the GNU libc. */
535 #ifdef _LIBC
536 #define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \
537 || (optind < nonoption_flags_len \
538 && __getopt_nonoption_flags[optind] == '1'))
539 #else
540 #define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0')
541 #endif
542
543 if (nextchar == NULL || *nextchar == '\0')
544 {
545 /* Advance to the next ARGV-element. */
546
547 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been
548 moved back by the user (who may also have changed the arguments). */
549 if (last_nonopt > optind)
550 last_nonopt = optind;
551 if (first_nonopt > optind)
552 first_nonopt = optind;
553
554 if (ordering == PERMUTE)
555 {
556 /* If we have just processed some options following some non-options,
557 exchange them so that the options come first. */
558
559 if (first_nonopt != last_nonopt && last_nonopt != optind)
560 exchange ((char **) argv);
561 else if (last_nonopt != optind)
562 first_nonopt = optind;
563
564 /* Skip any additional non-options
565 and extend the range of non-options previously skipped. */
566
567 while (optind < argc && NONOPTION_P)
568 optind++;
569 last_nonopt = optind;
570 }
571
572 /* The special ARGV-element `--' means premature end of options.
573 Skip it like a null option,
574 then exchange with previous non-options as if it were an option,
575 then skip everything else like a non-option. */
576
577 if (optind != argc && !strcmp (argv[optind], "--"))
578 {
579 optind++;
580
581 if (first_nonopt != last_nonopt && last_nonopt != optind)
582 exchange ((char **) argv);
583 else if (first_nonopt == last_nonopt)
584 first_nonopt = optind;
585 last_nonopt = argc;
586
587 optind = argc;
588 }
589
590 /* If we have done all the ARGV-elements, stop the scan
591 and back over any non-options that we skipped and permuted. */
592
593 if (optind == argc)
594 {
595 /* Set the next-arg-index to point at the non-options
596 that we previously skipped, so the caller will digest them. */
597 if (first_nonopt != last_nonopt)
598 optind = first_nonopt;
599 return -1;
600 }
601
602 /* If we have come to a non-option and did not permute it,
603 either stop the scan or describe it to the caller and pass it by. */
604
605 if (NONOPTION_P)
606 {
607 if (ordering == REQUIRE_ORDER)
608 return -1;
609 optarg = argv[optind++];
610 return 1;
611 }
612
613 /* We have found another option-ARGV-element.
614 Skip the initial punctuation. */
615
616 nextchar = (argv[optind] + 1
617 + (longopts != NULL && argv[optind][1] == '-'));
618 }
619
620 /* Decode the current option-ARGV-element. */
621
622 /* Check whether the ARGV-element is a long option.
623
624 If long_only and the ARGV-element has the form "-f", where f is
625 a valid short option, don't consider it an abbreviated form of
626 a long option that starts with f. Otherwise there would be no
627 way to give the -f short option.
628
629 On the other hand, if there's a long option "fubar" and
630 the ARGV-element is "-fu", do consider that an abbreviation of
631 the long option, just like "--fu", and not "-f" with arg "u".
632
633 This distinction seems to be the most useful approach. */
634
635 if (longopts != NULL
636 && (argv[optind][1] == '-'
637 || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1])))))
638 {
639 char *nameend;
640 const struct option *p;
641 const struct option *pfound = NULL;
642 int exact = 0;
643 int ambig = 0;
644 int indfound = -1;
645 int option_index;
646
647 for (nameend = nextchar; *nameend && *nameend != '='; nameend++)
648 /* Do nothing. */ ;
649
650 /* Test all long options for either exact match
651 or abbreviated matches. */
652 for (p = longopts, option_index = 0; p->name; p++, option_index++)
653 if (!strncmp (p->name, nextchar, nameend - nextchar))
654 {
655 if ((unsigned int) (nameend - nextchar)
656 == (unsigned int) strlen (p->name))
657 {
658 /* Exact match found. */
659 pfound = p;
660 indfound = option_index;
661 exact = 1;
662 break;
663 }
664 else if (pfound == NULL)
665 {
666 /* First nonexact match found. */
667 pfound = p;
668 indfound = option_index;
669 }
670 else
671 /* Second or later nonexact match found. */
672 ambig = 1;
673 }
674
675 if (ambig && !exact)
676 {
677 if (opterr)
678 fprintf (stderr, _("%s: option `%s' is ambiguous\n"),
679 argv[0], argv[optind]);
680 nextchar += strlen (nextchar);
681 optind++;
682 optopt = 0;
683 return '?';
684 }
685
686 if (pfound != NULL)
687 {
688 option_index = indfound;
689 optind++;
690 if (*nameend)
691 {
692 /* Don't test has_arg with >, because some C compilers don't
693 allow it to be used on enums. */
694 if (pfound->has_arg)
695 optarg = nameend + 1;
696 else
697 {
698 if (opterr)
699 if (argv[optind - 1][1] == '-')
700 /* --option */
701 fprintf (stderr,
702 _("%s: option `--%s' doesn't allow an argument\n"),
703 argv[0], pfound->name);
704 else
705 /* +option or -option */
706 fprintf (stderr,
707 _("%s: option `%c%s' doesn't allow an argument\n"),
708 argv[0], argv[optind - 1][0], pfound->name);
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
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
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 */

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