1 #include "config.h"
2 #ifdef NO_GETOPT_LONG
3
4 /* Added by JZ purely for warning suppression, because this getopt_long
5 * violates const. *sigh*
6 */
remove_const_char_ptr_ptr(char * const * x)7 static char **remove_const_char_ptr_ptr(char * const* x)
8 {
9 union {
10 char * const* before;
11 char * * after;
12 } pun;
13
14 pun.before = x;
15 return pun.after;
16 }
17
18 /* Getopt for GNU.
19 NOTE: getopt is now part of the C library, so if you don't know what
20 "Keep this file name-space clean" means, talk to roland@gnu.ai.mit.edu
21 before changing it!
22
23 Copyright (C) 1987, 88, 89, 90, 91, 92, 1993
24 Free Software Foundation, Inc.
25
26 This program is free software; you can redistribute it and/or modify it
27 under the terms of the GNU General Public License as published by the
28 Free Software Foundation; either version 2, or (at your option) any
29 later version.
30
31 This program is distributed in the hope that it will be useful,
32 but WITHOUT ANY WARRANTY; without even the implied warranty of
33 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
34 GNU General Public License for more details.
35
36 You should have received a copy of the GNU General Public License along
37 with this program; if not, write to the Free Software Foundation, Inc.,
38 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */
39
40 #if !defined(__STDC__) && !defined(__cplusplus)
41 # ifndef const
42 # define const
43 # endif
44 #endif
45
46 #include <stdio.h>
47
48 /* Comment out all this code if we are using the GNU C Library, and are not
49 actually compiling the library itself. This code is part of the GNU C
50 Library, but also included in many other GNU distributions. Compiling
51 and linking in this code is a waste when using the GNU C library
52 (especially if it is a shared library). Rather than having every GNU
53 program understand `configure --with-gnu-libc' and omit the object files,
54 it is simpler to just do this in the source for each such file. */
55
56 #if defined (_LIBC) || !defined (__GNU_LIBRARY__)
57
58
59 /* This needs to come after some library #include
60 to get __GNU_LIBRARY__ defined. */
61 #ifdef __GNU_LIBRARY__
62 /* Don't include stdlib.h for non-GNU C libraries because some of them
63 contain conflicting prototypes for getopt. */
64 #include <stdlib.h>
65 #endif /* GNU C library. */
66
67 /* If GETOPT_COMPAT is defined, `+' as well as `--' can introduce a
68 long-named option. Because this is not POSIX.2 compliant, it is
69 being phased out. */
70 /* #define GETOPT_COMPAT */
71
72 /* This version of `getopt' appears to the caller like standard Unix `getopt'
73 but it behaves differently for the user, since it allows the user
74 to intersperse the options with the other arguments.
75
76 As `getopt' works, it permutes the elements of ARGV so that,
77 when it is done, all the options precede everything else. Thus
78 all application programs are extended to handle flexible argument order.
79
80 Setting the environment variable POSIXLY_CORRECT disables permutation.
81 Then the behavior is completely standard.
82
83 GNU application programs can use a third alternative mode in which
84 they can distinguish the relative order of options and other arguments. */
85
86 #include "plat/gnu_getopt.h"
87
88 /* For communication from `getopt' to the caller.
89 When `getopt' finds an option that takes an argument,
90 the argument value is returned here.
91 Also, when `ordering' is RETURN_IN_ORDER,
92 each non-option ARGV-element is returned here. */
93
94 char *optarg = 0;
95
96 /* Index in ARGV of the next element to be scanned.
97 This is used for communication to and from the caller
98 and for communication between successive calls to `getopt'.
99
100 On entry to `getopt', zero means this is the first call; initialize.
101
102 When `getopt' returns EOF, this is the index of the first of the
103 non-option elements that the caller should itself scan.
104
105 Otherwise, `optind' communicates from one call to the next
106 how much of ARGV has been scanned so far. */
107
108 /* XXX 1003.2 says this must be 1 before any call. */
109 int optind = 0;
110
111 /* The next char to be scanned in the option-element
112 in which the last option character we returned was found.
113 This allows us to pick up the scan where we left off.
114
115 If this is zero, or a null string, it means resume the scan
116 by advancing to the next ARGV-element. */
117
118 static char *nextchar;
119
120 /* Callers store zero here to inhibit the error message
121 for unrecognized options. */
122
123 int opterr = 1;
124
125 /* Set to an option character which was unrecognized.
126 This must be initialized on some systems to avoid linking in the
127 system's own getopt implementation. */
128
129 #define BAD_OPTION '\0'
130 int optopt = BAD_OPTION;
131
132 /* Describe how to deal with options that follow non-option ARGV-elements.
133
134 If the caller did not specify anything,
135 the default is REQUIRE_ORDER if the environment variable
136 POSIXLY_CORRECT is defined, PERMUTE otherwise.
137
138 REQUIRE_ORDER means don't recognize them as options;
139 stop option processing when the first non-option is seen.
140 This is what Unix does.
141 This mode of operation is selected by either setting the environment
142 variable POSIXLY_CORRECT, or using `+' as the first character
143 of the list of option characters.
144
145 PERMUTE is the default. We permute the contents of ARGV as we scan,
146 so that eventually all the non-options are at the end. This allows options
147 to be given in any order, even with programs that were not written to
148 expect this.
149
150 RETURN_IN_ORDER is an option available to programs that were written
151 to expect options and other ARGV-elements in any order and that care about
152 the ordering of the two. We describe each non-option ARGV-element
153 as if it were the argument of an option with character code 1.
154 Using `-' as the first character of the list of option characters
155 selects this mode of operation.
156
157 The special argument `--' forces an end of option-scanning regardless
158 of the value of `ordering'. In the case of RETURN_IN_ORDER, only
159 `--' can cause `getopt' to return EOF with `optind' != ARGC. */
160
161 static enum
162 {
163 REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
164 } ordering;
165
166
167 #if 1 /* DISABLE THIS MAGIC TO WORK WITH MINGW32 */
168 #include <string.h>
169 #define my_index strchr
170 #define my_strlen strlen
171 #else
172 #ifdef __GNU_LIBRARY__
173 /* We want to avoid inclusion of string.h with non-GNU libraries
174 because there are many ways it can cause trouble.
175 On some systems, it contains special magic macros that don't work
176 in GCC. */
177 #include <string.h>
178 #define my_index strchr
179 #define my_strlen strlen
180 #else
181
182 /* Avoid depending on library functions or files
183 whose names are inconsistent. */
184
185 #if __STDC__ || defined(PROTO) || defined(__cplusplus)
186 extern char *getenv(const char *name);
187 extern int strcmp (const char *s1, const char *s2);
188 extern int strncmp(const char *s1, const char *s2, int n);
189
190 static int my_strlen(const char *s);
191 static char *my_index (const char *str, int chr);
192 #else
193 extern char *getenv ();
194 #endif
195
196 static int
my_strlen(str)197 my_strlen (str)
198 const char *str;
199 {
200 int n = 0;
201 while (*str++)
202 n++;
203 return n;
204 }
205
206 static char *
my_index(str,chr)207 my_index (str, chr)
208 const char *str;
209 int chr;
210 {
211 while (*str)
212 {
213 if (*str == chr)
214 return (char *) str;
215 str++;
216 }
217 return 0;
218 }
219
220 #endif /* GNU C library. */
221 #endif /* DISABLED MAGIC */
222
223 /* Handle permutation of arguments. */
224
225 /* Describe the part of ARGV that contains non-options that have
226 been skipped. `first_nonopt' is the index in ARGV of the first of them;
227 `last_nonopt' is the index after the last of them. */
228
229 static int first_nonopt;
230 static int last_nonopt;
231
232 /* Exchange two adjacent subsequences of ARGV.
233 One subsequence is elements [first_nonopt,last_nonopt)
234 which contains all the non-options that have been skipped so far.
235 The other is elements [last_nonopt,optind), which contains all
236 the options processed since those non-options were skipped.
237
238 `first_nonopt' and `last_nonopt' are relocated so that they describe
239 the new indices of the non-options in ARGV after they are moved.
240
241 To perform the swap, we first reverse the order of all elements. So
242 all options now come before all non options, but they are in the
243 wrong order. So we put back the options and non options in original
244 order by reversing them again. For example:
245 original input: a b c -x -y
246 reverse all: -y -x c b a
247 reverse options: -x -y c b a
248 reverse non options: -x -y a b c
249 */
250
251 #if __STDC__ || defined(PROTO) || defined(__cplusplus)
252 static void exchange (char **argv);
253 #endif
254
exchange(char ** argv)255 static void exchange (char **argv)
256 {
257 char *temp, **first, **last;
258
259 /* Reverse all the elements [first_nonopt, optind) */
260 first = &argv[first_nonopt];
261 last = &argv[optind-1];
262 while (first < last) {
263 temp = *first; *first = *last; *last = temp; first++; last--;
264 }
265 /* Put back the options in order */
266 first = &argv[first_nonopt];
267 first_nonopt += (optind - last_nonopt);
268 last = &argv[first_nonopt - 1];
269 while (first < last) {
270 temp = *first; *first = *last; *last = temp; first++; last--;
271 }
272
273 /* Put back the non options in order */
274 first = &argv[first_nonopt];
275 last_nonopt = optind;
276 last = &argv[last_nonopt-1];
277 while (first < last) {
278 temp = *first; *first = *last; *last = temp; first++; last--;
279 }
280 }
281
282 /* Scan elements of ARGV (whose length is ARGC) for option characters
283 given in OPTSTRING.
284
285 If an element of ARGV starts with '-', and is not exactly "-" or "--",
286 then it is an option element. The characters of this element
287 (aside from the initial '-') are option characters. If `getopt'
288 is called repeatedly, it returns successively each of the option characters
289 from each of the option elements.
290
291 If `getopt' finds another option character, it returns that character,
292 updating `optind' and `nextchar' so that the next call to `getopt' can
293 resume the scan with the following option character or ARGV-element.
294
295 If there are no more option characters, `getopt' returns `EOF'.
296 Then `optind' is the index in ARGV of the first ARGV-element
297 that is not an option. (The ARGV-elements have been permuted
298 so that those that are not options now come last.)
299
300 OPTSTRING is a string containing the legitimate option characters.
301 If an option character is seen that is not listed in OPTSTRING,
302 return BAD_OPTION after printing an error message. If you set `opterr' to
303 zero, the error message is suppressed but we still return BAD_OPTION.
304
305 If a char in OPTSTRING is followed by a colon, that means it wants an arg,
306 so the following text in the same ARGV-element, or the text of the following
307 ARGV-element, is returned in `optarg'. Two colons mean an option that
308 wants an optional arg; if there is text in the current ARGV-element,
309 it is returned in `optarg', otherwise `optarg' is set to zero.
310
311 If OPTSTRING starts with `-' or `+', it requests different methods of
312 handling the non-option ARGV-elements.
313 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
314
315 Long-named options begin with `--' instead of `-'.
316 Their names may be abbreviated as long as the abbreviation is unique
317 or is an exact match for some defined option. If they have an
318 argument, it follows the option name in the same ARGV-element, separated
319 from the option name by a `=', or else the in next ARGV-element.
320 When `getopt' finds a long-named option, it returns 0 if that option's
321 `flag' field is nonzero, the value of the option's `val' field
322 if the `flag' field is zero.
323
324 The elements of ARGV aren't really const, because we permute them.
325 But we pretend they're const in the prototype to be compatible
326 with other systems.
327
328 LONGOPTS is a vector of `struct option' terminated by an
329 element containing a name which is zero.
330
331 LONGIND returns the index in LONGOPT of the long-named option found.
332 It is only valid when a long-named option has been found by the most
333 recent call.
334
335 If LONG_ONLY is nonzero, '-' as well as '--' can introduce
336 long-named options. */
337
338 int
_getopt_internal(int argc,char * const * argv,const char * optstring,const struct option * longopts,int * longind,int long_only)339 _getopt_internal (int argc, char *const *argv, const char *optstring,
340 const struct option *longopts, int *longind, int long_only)
341 {
342 int option_index;
343
344 optarg = 0;
345
346 /* Initialize the internal data when the first call is made.
347 Start processing options with ARGV-element 1 (since ARGV-element 0
348 is the program name); the sequence of previously skipped
349 non-option ARGV-elements is empty. */
350
351 if (optind == 0)
352 {
353 first_nonopt = last_nonopt = optind = 1;
354
355 nextchar = NULL;
356
357 /* Determine how to handle the ordering of options and nonoptions. */
358
359 if (optstring[0] == '-')
360 {
361 ordering = RETURN_IN_ORDER;
362 ++optstring;
363 }
364 else if (optstring[0] == '+')
365 {
366 ordering = REQUIRE_ORDER;
367 ++optstring;
368 }
369 else if (getenv ("POSIXLY_CORRECT") != NULL)
370 ordering = REQUIRE_ORDER;
371 else
372 ordering = PERMUTE;
373 }
374
375 if (nextchar == NULL || *nextchar == '\0')
376 {
377 if (ordering == PERMUTE)
378 {
379 /* If we have just processed some options following some non-options,
380 exchange them so that the options come first. */
381
382 if (first_nonopt != last_nonopt && last_nonopt != optind)
383 exchange (remove_const_char_ptr_ptr(argv));
384 else if (last_nonopt != optind)
385 first_nonopt = optind;
386
387 /* Now skip any additional non-options
388 and extend the range of non-options previously skipped. */
389
390 while (optind < argc
391 && (argv[optind][0] != '-' || argv[optind][1] == '\0')
392 #ifdef GETOPT_COMPAT
393 && (longopts == NULL
394 || argv[optind][0] != '+' || argv[optind][1] == '\0')
395 #endif /* GETOPT_COMPAT */
396 )
397 optind++;
398 last_nonopt = optind;
399 }
400
401 /* Special ARGV-element `--' means premature end of options.
402 Skip it like a null option,
403 then exchange with previous non-options as if it were an option,
404 then skip everything else like a non-option. */
405
406 if (optind != argc && !strcmp (argv[optind], "--"))
407 {
408 optind++;
409
410 if (first_nonopt != last_nonopt && last_nonopt != optind)
411 exchange (remove_const_char_ptr_ptr(argv));
412 else if (first_nonopt == last_nonopt)
413 first_nonopt = optind;
414 last_nonopt = argc;
415
416 optind = argc;
417 }
418
419 /* If we have done all the ARGV-elements, stop the scan
420 and back over any non-options that we skipped and permuted. */
421
422 if (optind == argc)
423 {
424 /* Set the next-arg-index to point at the non-options
425 that we previously skipped, so the caller will digest them. */
426 if (first_nonopt != last_nonopt)
427 optind = first_nonopt;
428 return EOF;
429 }
430
431 /* If we have come to a non-option and did not permute it,
432 either stop the scan or describe it to the caller and pass it by. */
433
434 if ((argv[optind][0] != '-' || argv[optind][1] == '\0')
435 #ifdef GETOPT_COMPAT
436 && (longopts == NULL
437 || argv[optind][0] != '+' || argv[optind][1] == '\0')
438 #endif /* GETOPT_COMPAT */
439 )
440 {
441 if (ordering == REQUIRE_ORDER)
442 return EOF;
443 optarg = argv[optind++];
444 return 1;
445 }
446
447 /* We have found another option-ARGV-element.
448 Start decoding its characters. */
449
450 nextchar = (argv[optind] + 1
451 + (longopts != NULL && argv[optind][1] == '-'));
452 }
453
454 if (longopts != NULL
455 && ((argv[optind][0] == '-'
456 && (argv[optind][1] == '-' || long_only))
457 #ifdef GETOPT_COMPAT
458 || argv[optind][0] == '+'
459 #endif /* GETOPT_COMPAT */
460 ))
461 {
462 const struct option *p;
463 char *s = nextchar;
464 int exact = 0;
465 int ambig = 0;
466 const struct option *pfound = NULL;
467 int indfound = 0;
468
469 while (*s && *s != '=')
470 s++;
471
472 /* Test all options for either exact match or abbreviated matches. */
473 for (p = longopts, option_index = 0; p->name;
474 p++, option_index++)
475 if (!strncmp (p->name, nextchar, s - nextchar))
476 {
477 if (s - nextchar == (int)my_strlen (p->name))
478 {
479 /* Exact match found. */
480 pfound = p;
481 indfound = option_index;
482 exact = 1;
483 break;
484 }
485 else if (pfound == NULL)
486 {
487 /* First nonexact match found. */
488 pfound = p;
489 indfound = option_index;
490 }
491 else
492 /* Second nonexact match found. */
493 ambig = 1;
494 }
495
496 if (ambig && !exact)
497 {
498 if (opterr)
499 fprintf (stderr, "%s: option `%s' is ambiguous\n",
500 argv[0], argv[optind]);
501 nextchar += my_strlen (nextchar);
502 optind++;
503 return BAD_OPTION;
504 }
505
506 if (pfound != NULL)
507 {
508 option_index = indfound;
509 optind++;
510 if (*s)
511 {
512 /* Don't test has_arg with >, because some C compilers don't
513 allow it to be used on enums. */
514 if (pfound->has_arg)
515 optarg = s + 1;
516 else
517 {
518 if (opterr)
519 {
520 if (argv[optind - 1][1] == '-')
521 /* --option */
522 fprintf (stderr,
523 "%s: option `--%s' doesn't allow an argument\n",
524 argv[0], pfound->name);
525 else
526 /* +option or -option */
527 fprintf (stderr,
528 "%s: option `%c%s' doesn't allow an argument\n",
529 argv[0], argv[optind - 1][0], pfound->name);
530 }
531 nextchar += my_strlen (nextchar);
532 return BAD_OPTION;
533 }
534 }
535 else if (pfound->has_arg == 1)
536 {
537 if (optind < argc)
538 optarg = argv[optind++];
539 else
540 {
541 if (opterr)
542 fprintf (stderr, "%s: option `%s' requires an argument\n",
543 argv[0], argv[optind - 1]);
544 nextchar += my_strlen (nextchar);
545 return optstring[0] == ':' ? ':' : BAD_OPTION;
546 }
547 }
548 nextchar += my_strlen (nextchar);
549 if (longind != NULL)
550 *longind = option_index;
551 if (pfound->flag)
552 {
553 *(pfound->flag) = pfound->val;
554 return 0;
555 }
556 return pfound->val;
557 }
558 /* Can't find it as a long option. If this is not getopt_long_only,
559 or the option starts with '--' or is not a valid short
560 option, then it's an error.
561 Otherwise interpret it as a short option. */
562 if (!long_only || argv[optind][1] == '-'
563 #ifdef GETOPT_COMPAT
564 || argv[optind][0] == '+'
565 #endif /* GETOPT_COMPAT */
566 || my_index (optstring, *nextchar) == NULL)
567 {
568 if (opterr)
569 {
570 if (argv[optind][1] == '-')
571 /* --option */
572 fprintf (stderr, "%s: unrecognized option `--%s'\n",
573 argv[0], nextchar);
574 else
575 /* +option or -option */
576 fprintf (stderr, "%s: unrecognized option `%c%s'\n",
577 argv[0], argv[optind][0], nextchar);
578 }
579 nextchar = (char *) "";
580 optind++;
581 return BAD_OPTION;
582 }
583 }
584
585 /* Look at and handle the next option-character. */
586
587 {
588 char c = *nextchar++;
589 const char *temp = my_index (optstring, c);
590
591 /* Increment `optind' when we start to process its last character. */
592 if (*nextchar == '\0')
593 ++optind;
594
595 if (temp == NULL || c == ':')
596 {
597 if (opterr)
598 {
599 #if 0
600 if (c < 040 || c >= 0177)
601 fprintf (stderr, "%s: unrecognized option, character code 0%o\n",
602 argv[0], c);
603 else
604 fprintf (stderr, "%s: unrecognized option `-%c'\n", argv[0], c);
605 #else
606 /* 1003.2 specifies the format of this message. */
607 fprintf (stderr, "%s: illegal option -- %c\n", argv[0], c);
608 #endif
609 }
610 optopt = c;
611 return BAD_OPTION;
612 }
613 if (temp[1] == ':')
614 {
615 if (temp[2] == ':')
616 {
617 /* This is an option that accepts an argument optionally. */
618 if (*nextchar != '\0')
619 {
620 optarg = nextchar;
621 optind++;
622 }
623 else
624 optarg = 0;
625 nextchar = NULL;
626 }
627 else
628 {
629 /* This is an option that requires an argument. */
630 if (*nextchar != '\0')
631 {
632 optarg = nextchar;
633 /* If we end this ARGV-element by taking the rest as an arg,
634 we must advance to the next element now. */
635 optind++;
636 }
637 else if (optind == argc)
638 {
639 if (opterr)
640 {
641 #if 0
642 fprintf (stderr, "%s: option `-%c' requires an argument\n",
643 argv[0], c);
644 #else
645 /* 1003.2 specifies the format of this message. */
646 fprintf (stderr, "%s: option requires an argument -- %c\n",
647 argv[0], c);
648 #endif
649 }
650 optopt = c;
651 if (optstring[0] == ':')
652 c = ':';
653 else
654 c = BAD_OPTION;
655 }
656 else
657 /* We already incremented `optind' once;
658 increment it again when taking next ARGV-elt as argument. */
659 optarg = argv[optind++];
660 nextchar = NULL;
661 }
662 }
663 return c;
664 }
665 }
666
667 int
getopt(int argc,char * const * argv,const char * optstring)668 getopt (int argc, char *const *argv, const char *optstring)
669 {
670 return _getopt_internal (argc, argv, optstring,
671 (const struct option *) 0,
672 (int *) 0,
673 0);
674 }
675
676 int
getopt_long(int argc,char * const * argv,const char * options,const struct option * long_options,int * opt_index)677 getopt_long (int argc, char * const *argv, const char *options,
678 const struct option *long_options, int *opt_index)
679 {
680 return _getopt_internal (argc, argv, options, long_options, opt_index, 0);
681 }
682
683 #endif /* _LIBC or not __GNU_LIBRARY__. */
684
685 #ifdef TEST
686
687 /* Compile with -DTEST to make an executable for use in testing
688 the above definition of `getopt'. */
689
690 int
main(argc,argv)691 main (argc, argv)
692 int argc;
693 char **argv;
694 {
695 int c;
696 int digit_optind = 0;
697
698 while (1)
699 {
700 int this_option_optind = optind ? optind : 1;
701
702 c = getopt (argc, argv, "abc:d:0123456789");
703 if (c == EOF)
704 break;
705
706 switch (c)
707 {
708 case '0':
709 case '1':
710 case '2':
711 case '3':
712 case '4':
713 case '5':
714 case '6':
715 case '7':
716 case '8':
717 case '9':
718 if (digit_optind != 0 && digit_optind != this_option_optind)
719 printf ("digits occur in two different argv-elements.\n");
720 digit_optind = this_option_optind;
721 printf ("option %c\n", c);
722 break;
723
724 case 'a':
725 printf ("option a\n");
726 break;
727
728 case 'b':
729 printf ("option b\n");
730 break;
731
732 case 'c':
733 printf ("option c with value `%s'\n", optarg);
734 break;
735
736 case BAD_OPTION:
737 break;
738
739 default:
740 printf ("?? getopt returned character code 0%o ??\n", c);
741 }
742 }
743
744 if (optind < argc)
745 {
746 printf ("non-option ARGV-elements: ");
747 while (optind < argc)
748 printf ("%s ", argv[optind++]);
749 printf ("\n");
750 }
751
752 exit (0);
753 }
754
755 #endif /* TEST */
756
757 #else
758
759 /* ======================================================================== */
760 /* The following variable definition is present to keep certain over-anal */
761 /* compilers from complaining that the translation unit contained no */
762 /* actual definitions. */
763 /* ======================================================================== */
764
765 int gnu_getopt_ = 0;
766
767 #endif /* NO_GETOPT_LONG */
768