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8dea8d37 SE |
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, 1993 | |
7 | Free Software Foundation, Inc. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify it | |
10 | under the terms of the GNU General Public License as published by the | |
11 | Free Software Foundation; either version 2, or (at your option) any | |
12 | 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, write to the Free Software | |
21 | Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
22 | \f | |
8dea8d37 SE |
23 | #ifdef HAVE_CONFIG_H |
24 | #include "config.h" | |
25 | #endif | |
26 | ||
8dea8d37 SE |
27 | #if !__STDC__ && !defined(const) && IN_GCC |
28 | #define const | |
29 | #endif | |
30 | ||
31 | /* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>. */ | |
32 | #ifndef _NO_PROTO | |
33 | #define _NO_PROTO | |
34 | #endif | |
35 | ||
36 | #include <stdio.h> | |
37 | ||
38 | /* Comment out all this code if we are using the GNU C Library, and are not | |
39 | actually compiling the library itself. This code is part of the GNU C | |
40 | Library, but also included in many other GNU distributions. Compiling | |
41 | and linking in this code is a waste when using the GNU C library | |
42 | (especially if it is a shared library). Rather than having every GNU | |
43 | program understand `configure --with-gnu-libc' and omit the object files, | |
44 | it is simpler to just do this in the source for each such file. */ | |
45 | ||
46 | #if defined (_LIBC) || !defined (__GNU_LIBRARY__) | |
47 | ||
48 | ||
49 | /* This needs to come after some library #include | |
50 | to get __GNU_LIBRARY__ defined. */ | |
51 | #ifdef __GNU_LIBRARY__ | |
8dea8d37 SE |
52 | /* Don't include stdlib.h for non-GNU C libraries because some of them |
53 | contain conflicting prototypes for getopt. */ | |
54 | #include <stdlib.h> | |
8dea8d37 SE |
55 | #endif /* GNU C library. */ |
56 | ||
57 | /* If GETOPT_COMPAT is defined, `+' as well as `--' can introduce a | |
58 | long-named option. Because this is not POSIX.2 compliant, it is | |
59 | being phased out. */ | |
60 | /* #define GETOPT_COMPAT */ | |
61 | ||
62 | /* This version of `getopt' appears to the caller like standard Unix `getopt' | |
63 | but it behaves differently for the user, since it allows the user | |
64 | to intersperse the options with the other arguments. | |
65 | ||
66 | As `getopt' works, it permutes the elements of ARGV so that, | |
67 | when it is done, all the options precede everything else. Thus | |
68 | all application programs are extended to handle flexible argument order. | |
69 | ||
70 | Setting the environment variable POSIXLY_CORRECT disables permutation. | |
71 | Then the behavior is completely standard. | |
72 | ||
73 | GNU application programs can use a third alternative mode in which | |
74 | they can distinguish the relative order of options and other arguments. */ | |
75 | ||
76 | #include "getopt.h" | |
77 | ||
78 | /* For communication from `getopt' to the caller. | |
79 | When `getopt' finds an option that takes an argument, | |
80 | the argument value is returned here. | |
81 | Also, when `ordering' is RETURN_IN_ORDER, | |
82 | each non-option ARGV-element is returned here. */ | |
83 | ||
84 | char *optarg = 0; | |
85 | ||
86 | /* Index in ARGV of the next element to be scanned. | |
87 | This is used for communication to and from the caller | |
88 | and for communication between successive calls to `getopt'. | |
89 | ||
90 | On entry to `getopt', zero means this is the first call; initialize. | |
91 | ||
92 | When `getopt' returns EOF, this is the index of the first of the | |
93 | non-option elements that the caller should itself scan. | |
94 | ||
95 | Otherwise, `optind' communicates from one call to the next | |
96 | how much of ARGV has been scanned so far. */ | |
97 | ||
98 | /* XXX 1003.2 says this must be 1 before any call. */ | |
99 | int optind = 0; | |
100 | ||
101 | /* The next char to be scanned in the option-element | |
102 | in which the last option character we returned was found. | |
103 | This allows us to pick up the scan where we left off. | |
104 | ||
105 | If this is zero, or a null string, it means resume the scan | |
106 | by advancing to the next ARGV-element. */ | |
107 | ||
108 | static char *nextchar; | |
109 | ||
110 | /* Callers store zero here to inhibit the error message | |
111 | for unrecognized options. */ | |
112 | ||
113 | int opterr = 1; | |
114 | ||
115 | /* Set to an option character which was unrecognized. | |
116 | This must be initialized on some systems to avoid linking in the | |
117 | system's own getopt implementation. */ | |
118 | ||
119 | int optopt = '?'; | |
120 | ||
121 | /* Describe how to deal with options that follow non-option ARGV-elements. | |
122 | ||
123 | If the caller did not specify anything, | |
124 | the default is REQUIRE_ORDER if the environment variable | |
125 | POSIXLY_CORRECT is defined, PERMUTE otherwise. | |
126 | ||
127 | REQUIRE_ORDER means don't recognize them as options; | |
128 | stop option processing when the first non-option is seen. | |
129 | This is what Unix does. | |
130 | This mode of operation is selected by either setting the environment | |
131 | variable POSIXLY_CORRECT, or using `+' as the first character | |
132 | of the list of option characters. | |
133 | ||
134 | PERMUTE is the default. We permute the contents of ARGV as we scan, | |
135 | so that eventually all the non-options are at the end. This allows options | |
136 | to be given in any order, even with programs that were not written to | |
137 | expect this. | |
138 | ||
139 | RETURN_IN_ORDER is an option available to programs that were written | |
140 | to expect options and other ARGV-elements in any order and that care about | |
141 | the ordering of the two. We describe each non-option ARGV-element | |
142 | as if it were the argument of an option with character code 1. | |
143 | Using `-' as the first character of the list of option characters | |
144 | selects this mode of operation. | |
145 | ||
146 | The special argument `--' forces an end of option-scanning regardless | |
147 | of the value of `ordering'. In the case of RETURN_IN_ORDER, only | |
148 | `--' can cause `getopt' to return EOF with `optind' != ARGC. */ | |
149 | ||
150 | static enum | |
151 | { | |
152 | REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER | |
153 | } ordering; | |
154 | \f | |
155 | #ifdef __GNU_LIBRARY__ | |
156 | /* We want to avoid inclusion of string.h with non-GNU libraries | |
157 | because there are many ways it can cause trouble. | |
158 | On some systems, it contains special magic macros that don't work | |
159 | in GCC. */ | |
160 | #include <string.h> | |
161 | #define my_index strchr | |
162 | #define my_bcopy(src, dst, n) memcpy ((dst), (src), (n)) | |
163 | #else | |
164 | ||
165 | /* Avoid depending on library functions or files | |
166 | whose names are inconsistent. */ | |
167 | ||
168 | char *getenv (); | |
169 | ||
170 | static char * | |
171 | my_index (str, chr) | |
172 | const char *str; | |
173 | int chr; | |
174 | { | |
175 | while (*str) | |
176 | { | |
177 | if (*str == chr) | |
178 | return (char *) str; | |
179 | str++; | |
180 | } | |
181 | return 0; | |
182 | } | |
183 | ||
184 | static void | |
185 | my_bcopy (from, to, size) | |
186 | const char *from; | |
187 | char *to; | |
188 | int size; | |
189 | { | |
190 | int i; | |
191 | for (i = 0; i < size; i++) | |
192 | to[i] = from[i]; | |
193 | } | |
194 | #endif /* GNU C library. */ | |
195 | \f | |
196 | /* Handle permutation of arguments. */ | |
197 | ||
198 | /* Describe the part of ARGV that contains non-options that have | |
199 | been skipped. `first_nonopt' is the index in ARGV of the first of them; | |
200 | `last_nonopt' is the index after the last of them. */ | |
201 | ||
202 | static int first_nonopt; | |
203 | static int last_nonopt; | |
204 | ||
205 | /* Exchange two adjacent subsequences of ARGV. | |
206 | One subsequence is elements [first_nonopt,last_nonopt) | |
207 | which contains all the non-options that have been skipped so far. | |
208 | The other is elements [last_nonopt,optind), which contains all | |
209 | the options processed since those non-options were skipped. | |
210 | ||
211 | `first_nonopt' and `last_nonopt' are relocated so that they describe | |
212 | the new indices of the non-options in ARGV after they are moved. */ | |
213 | ||
214 | static void | |
215 | exchange (argv) | |
216 | char **argv; | |
217 | { | |
218 | int nonopts_size = (last_nonopt - first_nonopt) * sizeof (char *); | |
3b83c932 | 219 | char **temp = (char **) safe_malloc (nonopts_size, "getopt"); |
8dea8d37 SE |
220 | |
221 | /* Interchange the two blocks of data in ARGV. */ | |
222 | ||
223 | my_bcopy ((char *) &argv[first_nonopt], (char *) temp, nonopts_size); | |
224 | my_bcopy ((char *) &argv[last_nonopt], (char *) &argv[first_nonopt], | |
225 | (optind - last_nonopt) * sizeof (char *)); | |
226 | my_bcopy ((char *) temp, | |
227 | (char *) &argv[first_nonopt + optind - last_nonopt], | |
228 | nonopts_size); | |
229 | ||
230 | /* Update records for the slots the non-options now occupy. */ | |
231 | ||
232 | first_nonopt += (optind - last_nonopt); | |
233 | last_nonopt = optind; | |
3b83c932 | 234 | free(temp); |
8dea8d37 SE |
235 | } |
236 | \f | |
237 | /* Scan elements of ARGV (whose length is ARGC) for option characters | |
238 | given in OPTSTRING. | |
239 | ||
240 | If an element of ARGV starts with '-', and is not exactly "-" or "--", | |
241 | then it is an option element. The characters of this element | |
242 | (aside from the initial '-') are option characters. If `getopt' | |
243 | is called repeatedly, it returns successively each of the option characters | |
244 | from each of the option elements. | |
245 | ||
246 | If `getopt' finds another option character, it returns that character, | |
247 | updating `optind' and `nextchar' so that the next call to `getopt' can | |
248 | resume the scan with the following option character or ARGV-element. | |
249 | ||
250 | If there are no more option characters, `getopt' returns `EOF'. | |
251 | Then `optind' is the index in ARGV of the first ARGV-element | |
252 | that is not an option. (The ARGV-elements have been permuted | |
253 | so that those that are not options now come last.) | |
254 | ||
255 | OPTSTRING is a string containing the legitimate option characters. | |
256 | If an option character is seen that is not listed in OPTSTRING, | |
257 | return '?' after printing an error message. If you set `opterr' to | |
258 | zero, the error message is suppressed but we still return '?'. | |
259 | ||
260 | If a char in OPTSTRING is followed by a colon, that means it wants an arg, | |
261 | so the following text in the same ARGV-element, or the text of the following | |
262 | ARGV-element, is returned in `optarg'. Two colons mean an option that | |
263 | wants an optional arg; if there is text in the current ARGV-element, | |
264 | it is returned in `optarg', otherwise `optarg' is set to zero. | |
265 | ||
266 | If OPTSTRING starts with `-' or `+', it requests different methods of | |
267 | handling the non-option ARGV-elements. | |
268 | See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above. | |
269 | ||
270 | Long-named options begin with `--' instead of `-'. | |
271 | Their names may be abbreviated as long as the abbreviation is unique | |
272 | or is an exact match for some defined option. If they have an | |
273 | argument, it follows the option name in the same ARGV-element, separated | |
274 | from the option name by a `=', or else the in next ARGV-element. | |
275 | When `getopt' finds a long-named option, it returns 0 if that option's | |
276 | `flag' field is nonzero, the value of the option's `val' field | |
277 | if the `flag' field is zero. | |
278 | ||
279 | The elements of ARGV aren't really const, because we permute them. | |
280 | But we pretend they're const in the prototype to be compatible | |
281 | with other systems. | |
282 | ||
283 | LONGOPTS is a vector of `struct option' terminated by an | |
284 | element containing a name which is zero. | |
285 | ||
286 | LONGIND returns the index in LONGOPT of the long-named option found. | |
287 | It is only valid when a long-named option has been found by the most | |
288 | recent call. | |
289 | ||
290 | If LONG_ONLY is nonzero, '-' as well as '--' can introduce | |
291 | long-named options. */ | |
292 | ||
293 | int | |
294 | _getopt_internal (argc, argv, optstring, longopts, longind, long_only) | |
295 | int argc; | |
296 | char *const *argv; | |
297 | const char *optstring; | |
298 | const struct option *longopts; | |
299 | int *longind; | |
300 | int long_only; | |
301 | { | |
302 | int option_index; | |
303 | ||
304 | optarg = 0; | |
305 | ||
306 | /* Initialize the internal data when the first call is made. | |
307 | Start processing options with ARGV-element 1 (since ARGV-element 0 | |
308 | is the program name); the sequence of previously skipped | |
309 | non-option ARGV-elements is empty. */ | |
310 | ||
311 | if (optind == 0) | |
312 | { | |
313 | first_nonopt = last_nonopt = optind = 1; | |
314 | ||
315 | nextchar = NULL; | |
316 | ||
317 | /* Determine how to handle the ordering of options and nonoptions. */ | |
318 | ||
319 | if (optstring[0] == '-') | |
320 | { | |
321 | ordering = RETURN_IN_ORDER; | |
322 | ++optstring; | |
323 | } | |
324 | else if (optstring[0] == '+') | |
325 | { | |
326 | ordering = REQUIRE_ORDER; | |
327 | ++optstring; | |
328 | } | |
329 | else if (getenv ("POSIXLY_CORRECT") != NULL) | |
330 | ordering = REQUIRE_ORDER; | |
331 | else | |
332 | ordering = PERMUTE; | |
333 | } | |
334 | ||
335 | if (nextchar == NULL || *nextchar == '\0') | |
336 | { | |
337 | if (ordering == PERMUTE) | |
338 | { | |
339 | /* If we have just processed some options following some non-options, | |
340 | exchange them so that the options come first. */ | |
341 | ||
342 | if (first_nonopt != last_nonopt && last_nonopt != optind) | |
343 | exchange ((char **) argv); | |
344 | else if (last_nonopt != optind) | |
345 | first_nonopt = optind; | |
346 | ||
347 | /* Now skip any additional non-options | |
348 | and extend the range of non-options previously skipped. */ | |
349 | ||
350 | while (optind < argc | |
351 | && (argv[optind][0] != '-' || argv[optind][1] == '\0') | |
352 | #ifdef GETOPT_COMPAT | |
353 | && (longopts == NULL | |
354 | || argv[optind][0] != '+' || argv[optind][1] == '\0') | |
355 | #endif /* GETOPT_COMPAT */ | |
356 | ) | |
357 | optind++; | |
358 | last_nonopt = optind; | |
359 | } | |
360 | ||
361 | /* Special ARGV-element `--' means premature end of options. | |
362 | Skip it like a null option, | |
363 | then exchange with previous non-options as if it were an option, | |
364 | then skip everything else like a non-option. */ | |
365 | ||
366 | if (optind != argc && !strcmp (argv[optind], "--")) | |
367 | { | |
368 | optind++; | |
369 | ||
370 | if (first_nonopt != last_nonopt && last_nonopt != optind) | |
371 | exchange ((char **) argv); | |
372 | else if (first_nonopt == last_nonopt) | |
373 | first_nonopt = optind; | |
374 | last_nonopt = argc; | |
375 | ||
376 | optind = argc; | |
377 | } | |
378 | ||
379 | /* If we have done all the ARGV-elements, stop the scan | |
380 | and back over any non-options that we skipped and permuted. */ | |
381 | ||
382 | if (optind == argc) | |
383 | { | |
384 | /* Set the next-arg-index to point at the non-options | |
385 | that we previously skipped, so the caller will digest them. */ | |
386 | if (first_nonopt != last_nonopt) | |
387 | optind = first_nonopt; | |
388 | return EOF; | |
389 | } | |
390 | ||
391 | /* If we have come to a non-option and did not permute it, | |
392 | either stop the scan or describe it to the caller and pass it by. */ | |
393 | ||
394 | if ((argv[optind][0] != '-' || argv[optind][1] == '\0') | |
395 | #ifdef GETOPT_COMPAT | |
396 | && (longopts == NULL | |
397 | || argv[optind][0] != '+' || argv[optind][1] == '\0') | |
398 | #endif /* GETOPT_COMPAT */ | |
399 | ) | |
400 | { | |
401 | if (ordering == REQUIRE_ORDER) | |
402 | return EOF; | |
403 | optarg = argv[optind++]; | |
404 | return 1; | |
405 | } | |
406 | ||
407 | /* We have found another option-ARGV-element. | |
408 | Start decoding its characters. */ | |
409 | ||
410 | nextchar = (argv[optind] + 1 | |
411 | + (longopts != NULL && argv[optind][1] == '-')); | |
412 | } | |
413 | ||
414 | if (longopts != NULL | |
415 | && ((argv[optind][0] == '-' | |
416 | && (argv[optind][1] == '-' || long_only)) | |
417 | #ifdef GETOPT_COMPAT | |
418 | || argv[optind][0] == '+' | |
419 | #endif /* GETOPT_COMPAT */ | |
420 | )) | |
421 | { | |
422 | const struct option *p; | |
423 | char *s = nextchar; | |
424 | int exact = 0; | |
425 | int ambig = 0; | |
426 | const struct option *pfound = NULL; | |
427 | int indfound; | |
428 | ||
429 | while (*s && *s != '=') | |
430 | s++; | |
431 | ||
432 | /* Test all options for either exact match or abbreviated matches. */ | |
433 | for (p = longopts, option_index = 0; p->name; | |
434 | p++, option_index++) | |
435 | if (!strncmp (p->name, nextchar, s - nextchar)) | |
436 | { | |
437 | if (s - nextchar == strlen (p->name)) | |
438 | { | |
439 | /* Exact match found. */ | |
440 | pfound = p; | |
441 | indfound = option_index; | |
442 | exact = 1; | |
443 | break; | |
444 | } | |
445 | else if (pfound == NULL) | |
446 | { | |
447 | /* First nonexact match found. */ | |
448 | pfound = p; | |
449 | indfound = option_index; | |
450 | } | |
451 | else | |
452 | /* Second nonexact match found. */ | |
453 | ambig = 1; | |
454 | } | |
455 | ||
456 | if (ambig && !exact) | |
457 | { | |
458 | if (opterr) | |
459 | fprintf (stderr, "%s: option `%s' is ambiguous\n", | |
460 | argv[0], argv[optind]); | |
461 | nextchar += strlen (nextchar); | |
462 | optind++; | |
463 | return '?'; | |
464 | } | |
465 | ||
466 | if (pfound != NULL) | |
467 | { | |
468 | option_index = indfound; | |
469 | optind++; | |
470 | if (*s) | |
471 | { | |
472 | /* Don't test has_arg with >, because some C compilers don't | |
473 | allow it to be used on enums. */ | |
474 | if (pfound->has_arg) | |
475 | optarg = s + 1; | |
476 | else | |
477 | { | |
478 | if (opterr) | |
479 | { | |
480 | if (argv[optind - 1][1] == '-') | |
481 | /* --option */ | |
482 | fprintf (stderr, | |
483 | "%s: option `--%s' doesn't allow an argument\n", | |
484 | argv[0], pfound->name); | |
485 | else | |
486 | /* +option or -option */ | |
487 | fprintf (stderr, | |
488 | "%s: option `%c%s' doesn't allow an argument\n", | |
489 | argv[0], argv[optind - 1][0], pfound->name); | |
490 | } | |
491 | nextchar += strlen (nextchar); | |
492 | return '?'; | |
493 | } | |
494 | } | |
495 | else if (pfound->has_arg == 1) | |
496 | { | |
497 | if (optind < argc) | |
498 | optarg = argv[optind++]; | |
499 | else | |
500 | { | |
501 | if (opterr) | |
502 | fprintf (stderr, "%s: option `%s' requires an argument\n", | |
503 | argv[0], argv[optind - 1]); | |
504 | nextchar += strlen (nextchar); | |
505 | return optstring[0] == ':' ? ':' : '?'; | |
506 | } | |
507 | } | |
508 | nextchar += strlen (nextchar); | |
509 | if (longind != NULL) | |
510 | *longind = option_index; | |
511 | if (pfound->flag) | |
512 | { | |
513 | *(pfound->flag) = pfound->val; | |
514 | return 0; | |
515 | } | |
516 | return pfound->val; | |
517 | } | |
518 | /* Can't find it as a long option. If this is not getopt_long_only, | |
519 | or the option starts with '--' or is not a valid short | |
520 | option, then it's an error. | |
521 | Otherwise interpret it as a short option. */ | |
522 | if (!long_only || argv[optind][1] == '-' | |
523 | #ifdef GETOPT_COMPAT | |
524 | || argv[optind][0] == '+' | |
525 | #endif /* GETOPT_COMPAT */ | |
526 | || my_index (optstring, *nextchar) == NULL) | |
527 | { | |
528 | if (opterr) | |
529 | { | |
530 | if (argv[optind][1] == '-') | |
531 | /* --option */ | |
532 | fprintf (stderr, "%s: unrecognized option `--%s'\n", | |
533 | argv[0], nextchar); | |
534 | else | |
535 | /* +option or -option */ | |
536 | fprintf (stderr, "%s: unrecognized option `%c%s'\n", | |
537 | argv[0], argv[optind][0], nextchar); | |
538 | } | |
539 | nextchar = (char *) ""; | |
540 | optind++; | |
541 | return '?'; | |
542 | } | |
543 | } | |
544 | ||
545 | /* Look at and handle the next option-character. */ | |
546 | ||
547 | { | |
548 | char c = *nextchar++; | |
549 | char *temp = my_index (optstring, c); | |
550 | ||
551 | /* Increment `optind' when we start to process its last character. */ | |
552 | if (*nextchar == '\0') | |
553 | ++optind; | |
554 | ||
555 | if (temp == NULL || c == ':') | |
556 | { | |
557 | if (opterr) | |
558 | { | |
559 | #if 0 | |
560 | if (c < 040 || c >= 0177) | |
561 | fprintf (stderr, "%s: unrecognized option, character code 0%o\n", | |
562 | argv[0], c); | |
563 | else | |
564 | fprintf (stderr, "%s: unrecognized option `-%c'\n", argv[0], c); | |
565 | #else | |
566 | /* 1003.2 specifies the format of this message. */ | |
567 | fprintf (stderr, "%s: illegal option -- %c\n", argv[0], c); | |
568 | #endif | |
569 | } | |
570 | optopt = c; | |
571 | return '?'; | |
572 | } | |
573 | if (temp[1] == ':') | |
574 | { | |
575 | if (temp[2] == ':') | |
576 | { | |
577 | /* This is an option that accepts an argument optionally. */ | |
578 | if (*nextchar != '\0') | |
579 | { | |
580 | optarg = nextchar; | |
581 | optind++; | |
582 | } | |
583 | else | |
584 | optarg = 0; | |
585 | nextchar = NULL; | |
586 | } | |
587 | else | |
588 | { | |
589 | /* This is an option that requires an argument. */ | |
590 | if (*nextchar != '\0') | |
591 | { | |
592 | optarg = nextchar; | |
593 | /* If we end this ARGV-element by taking the rest as an arg, | |
594 | we must advance to the next element now. */ | |
595 | optind++; | |
596 | } | |
597 | else if (optind == argc) | |
598 | { | |
599 | if (opterr) | |
600 | { | |
601 | #if 0 | |
602 | fprintf (stderr, "%s: option `-%c' requires an argument\n", | |
603 | argv[0], c); | |
604 | #else | |
605 | /* 1003.2 specifies the format of this message. */ | |
606 | fprintf (stderr, "%s: option requires an argument -- %c\n", | |
607 | argv[0], c); | |
608 | #endif | |
609 | } | |
610 | optopt = c; | |
611 | if (optstring[0] == ':') | |
612 | c = ':'; | |
613 | else | |
614 | c = '?'; | |
615 | } | |
616 | else | |
617 | /* We already incremented `optind' once; | |
618 | increment it again when taking next ARGV-elt as argument. */ | |
619 | optarg = argv[optind++]; | |
620 | nextchar = NULL; | |
621 | } | |
622 | } | |
623 | return c; | |
624 | } | |
625 | } | |
626 | ||
627 | int | |
628 | getopt (argc, argv, optstring) | |
629 | int argc; | |
630 | char *const *argv; | |
631 | const char *optstring; | |
632 | { | |
633 | return _getopt_internal (argc, argv, optstring, | |
634 | (const struct option *) 0, | |
635 | (int *) 0, | |
636 | 0); | |
637 | } | |
638 | ||
639 | #endif /* _LIBC or not __GNU_LIBRARY__. */ | |
640 | \f | |
641 | #ifdef TEST | |
642 | ||
643 | /* Compile with -DTEST to make an executable for use in testing | |
644 | the above definition of `getopt'. */ | |
645 | ||
646 | int | |
647 | main (argc, argv) | |
648 | int argc; | |
649 | char **argv; | |
650 | { | |
651 | int c; | |
652 | int digit_optind = 0; | |
653 | ||
654 | while (1) | |
655 | { | |
656 | int this_option_optind = optind ? optind : 1; | |
657 | ||
658 | c = getopt (argc, argv, "abc:d:0123456789"); | |
659 | if (c == EOF) | |
660 | break; | |
661 | ||
662 | switch (c) | |
663 | { | |
664 | case '0': | |
665 | case '1': | |
666 | case '2': | |
667 | case '3': | |
668 | case '4': | |
669 | case '5': | |
670 | case '6': | |
671 | case '7': | |
672 | case '8': | |
673 | case '9': | |
674 | if (digit_optind != 0 && digit_optind != this_option_optind) | |
675 | printf ("digits occur in two different argv-elements.\n"); | |
676 | digit_optind = this_option_optind; | |
677 | printf ("option %c\n", c); | |
678 | break; | |
679 | ||
680 | case 'a': | |
681 | printf ("option a\n"); | |
682 | break; | |
683 | ||
684 | case 'b': | |
685 | printf ("option b\n"); | |
686 | break; | |
687 | ||
688 | case 'c': | |
689 | printf ("option c with value `%s'\n", optarg); | |
690 | break; | |
691 | ||
692 | case '?': | |
693 | break; | |
694 | ||
695 | default: | |
696 | printf ("?? getopt returned character code 0%o ??\n", c); | |
697 | } | |
698 | } | |
699 | ||
700 | if (optind < argc) | |
701 | { | |
702 | printf ("non-option ARGV-elements: "); | |
703 | while (optind < argc) | |
704 | printf ("%s ", argv[optind++]); | |
705 | printf ("\n"); | |
706 | } | |
707 | ||
708 | exit (0); | |
709 | } | |
710 | ||
711 | #endif /* TEST */ |