Commit | Line | Data |
---|---|---|
9a722b34 NW |
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 | |
23 | /* NOTE!!! AIX requires this to be the first thing in the file. | |
24 | Do not put ANYTHING before it! */ | |
25 | #if !defined (__GNUC__) && defined (_AIX) | |
26 | #pragma alloca | |
27 | #endif | |
28 | ||
29 | #ifdef HAVE_CONFIG_H | |
30 | #include "config.h" | |
31 | #endif | |
32 | ||
33 | #ifdef __GNUC__ | |
34 | #define alloca __builtin_alloca | |
35 | #else /* not __GNUC__ */ | |
36 | #if defined (HAVE_ALLOCA_H) || (defined(sparc) && (defined(sun) || (!defined(USG) && !defined(SVR4) && !defined(__svr4__)))) | |
37 | #include <alloca.h> | |
38 | #else | |
39 | #ifndef _AIX | |
40 | char *alloca (); | |
41 | #endif | |
42 | #endif /* alloca.h */ | |
43 | #endif /* not __GNUC__ */ | |
44 | ||
45 | #if !__STDC__ && !defined(const) && IN_GCC | |
46 | #define const | |
47 | #endif | |
48 | ||
49 | /* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>. */ | |
50 | #ifndef _NO_PROTO | |
51 | #define _NO_PROTO | |
52 | #endif | |
53 | ||
54 | #include <stdio.h> | |
55 | ||
56 | /* Comment out all this code if we are using the GNU C Library, and are not | |
57 | actually compiling the library itself. This code is part of the GNU C | |
58 | Library, but also included in many other GNU distributions. Compiling | |
59 | and linking in this code is a waste when using the GNU C library | |
60 | (especially if it is a shared library). Rather than having every GNU | |
61 | program understand `configure --with-gnu-libc' and omit the object files, | |
62 | it is simpler to just do this in the source for each such file. */ | |
63 | ||
64 | #if defined (_LIBC) || !defined (__GNU_LIBRARY__) | |
65 | ||
66 | ||
67 | /* This needs to come after some library #include | |
68 | to get __GNU_LIBRARY__ defined. */ | |
69 | #ifdef __GNU_LIBRARY__ | |
70 | #undef alloca | |
71 | /* Don't include stdlib.h for non-GNU C libraries because some of them | |
72 | contain conflicting prototypes for getopt. */ | |
73 | #include <stdlib.h> | |
74 | #else /* Not GNU C library. */ | |
75 | #define __alloca alloca | |
76 | #endif /* GNU C library. */ | |
77 | ||
78 | /* If GETOPT_COMPAT is defined, `+' as well as `--' can introduce a | |
79 | long-named option. Because this is not POSIX.2 compliant, it is | |
80 | being phased out. */ | |
81 | /* #define GETOPT_COMPAT */ | |
82 | ||
83 | /* This version of `getopt' appears to the caller like standard Unix `getopt' | |
84 | but it behaves differently for the user, since it allows the user | |
85 | to intersperse the options with the other arguments. | |
86 | ||
87 | As `getopt' works, it permutes the elements of ARGV so that, | |
88 | when it is done, all the options precede everything else. Thus | |
89 | all application programs are extended to handle flexible argument order. | |
90 | ||
91 | Setting the environment variable POSIXLY_CORRECT disables permutation. | |
92 | Then the behavior is completely standard. | |
93 | ||
94 | GNU application programs can use a third alternative mode in which | |
95 | they can distinguish the relative order of options and other arguments. */ | |
96 | ||
97 | #include "getopt.h" | |
98 | ||
99 | /* For communication from `getopt' to the caller. | |
100 | When `getopt' finds an option that takes an argument, | |
101 | the argument value is returned here. | |
102 | Also, when `ordering' is RETURN_IN_ORDER, | |
103 | each non-option ARGV-element is returned here. */ | |
104 | ||
105 | char *optarg = 0; | |
106 | ||
107 | /* Index in ARGV of the next element to be scanned. | |
108 | This is used for communication to and from the caller | |
109 | and for communication between successive calls to `getopt'. | |
110 | ||
111 | On entry to `getopt', zero means this is the first call; initialize. | |
112 | ||
113 | When `getopt' returns EOF, this is the index of the first of the | |
114 | non-option elements that the caller should itself scan. | |
115 | ||
116 | Otherwise, `optind' communicates from one call to the next | |
117 | how much of ARGV has been scanned so far. */ | |
118 | ||
119 | /* XXX 1003.2 says this must be 1 before any call. */ | |
120 | int optind = 0; | |
121 | ||
122 | /* The next char to be scanned in the option-element | |
123 | in which the last option character we returned was found. | |
124 | This allows us to pick up the scan where we left off. | |
125 | ||
126 | If this is zero, or a null string, it means resume the scan | |
127 | by advancing to the next ARGV-element. */ | |
128 | ||
129 | static char *nextchar; | |
130 | ||
131 | /* Callers store zero here to inhibit the error message | |
132 | for unrecognized options. */ | |
133 | ||
134 | int opterr = 1; | |
135 | ||
136 | /* Set to an option character which was unrecognized. | |
137 | This must be initialized on some systems to avoid linking in the | |
138 | system's own getopt implementation. */ | |
139 | ||
140 | int optopt = '?'; | |
141 | ||
142 | /* Describe how to deal with options that follow non-option ARGV-elements. | |
143 | ||
144 | If the caller did not specify anything, | |
145 | the default is REQUIRE_ORDER if the environment variable | |
146 | POSIXLY_CORRECT is defined, PERMUTE otherwise. | |
147 | ||
148 | REQUIRE_ORDER means don't recognize them as options; | |
149 | stop option processing when the first non-option is seen. | |
150 | This is what Unix does. | |
151 | This mode of operation is selected by either setting the environment | |
152 | variable POSIXLY_CORRECT, or using `+' as the first character | |
153 | of the list of option characters. | |
154 | ||
155 | PERMUTE is the default. We permute the contents of ARGV as we scan, | |
156 | so that eventually all the non-options are at the end. This allows options | |
157 | to be given in any order, even with programs that were not written to | |
158 | expect this. | |
159 | ||
160 | RETURN_IN_ORDER is an option available to programs that were written | |
161 | to expect options and other ARGV-elements in any order and that care about | |
162 | the ordering of the two. We describe each non-option ARGV-element | |
163 | as if it were the argument of an option with character code 1. | |
164 | Using `-' as the first character of the list of option characters | |
165 | selects this mode of operation. | |
166 | ||
167 | The special argument `--' forces an end of option-scanning regardless | |
168 | of the value of `ordering'. In the case of RETURN_IN_ORDER, only | |
169 | `--' can cause `getopt' to return EOF with `optind' != ARGC. */ | |
170 | ||
171 | static enum | |
172 | { | |
173 | REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER | |
174 | } ordering; | |
175 | \f | |
176 | #ifdef __GNU_LIBRARY__ | |
177 | /* We want to avoid inclusion of string.h with non-GNU libraries | |
178 | because there are many ways it can cause trouble. | |
179 | On some systems, it contains special magic macros that don't work | |
180 | in GCC. */ | |
181 | #include <string.h> | |
182 | #define my_index strchr | |
183 | #define my_bcopy(src, dst, n) memcpy ((dst), (src), (n)) | |
184 | #else | |
185 | ||
186 | /* Avoid depending on library functions or files | |
187 | whose names are inconsistent. */ | |
188 | ||
189 | char *getenv (); | |
190 | ||
191 | static char * | |
192 | my_index (str, chr) | |
193 | const char *str; | |
194 | int chr; | |
195 | { | |
196 | while (*str) | |
197 | { | |
198 | if (*str == chr) | |
199 | return (char *) str; | |
200 | str++; | |
201 | } | |
202 | return 0; | |
203 | } | |
204 | ||
205 | static void | |
206 | my_bcopy (from, to, size) | |
207 | const char *from; | |
208 | char *to; | |
209 | int size; | |
210 | { | |
211 | int i; | |
212 | for (i = 0; i < size; i++) | |
213 | to[i] = from[i]; | |
214 | } | |
215 | #endif /* GNU C library. */ | |
216 | \f | |
217 | /* Handle permutation of arguments. */ | |
218 | ||
219 | /* Describe the part of ARGV that contains non-options that have | |
220 | been skipped. `first_nonopt' is the index in ARGV of the first of them; | |
221 | `last_nonopt' is the index after the last of them. */ | |
222 | ||
223 | static int first_nonopt; | |
224 | static int last_nonopt; | |
225 | ||
226 | /* Exchange two adjacent subsequences of ARGV. | |
227 | One subsequence is elements [first_nonopt,last_nonopt) | |
228 | which contains all the non-options that have been skipped so far. | |
229 | The other is elements [last_nonopt,optind), which contains all | |
230 | the options processed since those non-options were skipped. | |
231 | ||
232 | `first_nonopt' and `last_nonopt' are relocated so that they describe | |
233 | the new indices of the non-options in ARGV after they are moved. */ | |
234 | ||
235 | static void | |
236 | exchange (argv) | |
237 | char **argv; | |
238 | { | |
239 | int nonopts_size = (last_nonopt - first_nonopt) * sizeof (char *); | |
240 | char **temp = (char **) __alloca (nonopts_size); | |
241 | ||
242 | /* Interchange the two blocks of data in ARGV. */ | |
243 | ||
244 | my_bcopy ((char *) &argv[first_nonopt], (char *) temp, nonopts_size); | |
245 | my_bcopy ((char *) &argv[last_nonopt], (char *) &argv[first_nonopt], | |
246 | (optind - last_nonopt) * sizeof (char *)); | |
247 | my_bcopy ((char *) temp, | |
248 | (char *) &argv[first_nonopt + optind - last_nonopt], | |
249 | nonopts_size); | |
250 | ||
251 | /* Update records for the slots the non-options now occupy. */ | |
252 | ||
253 | first_nonopt += (optind - last_nonopt); | |
254 | last_nonopt = optind; | |
255 | } | |
256 | \f | |
257 | /* Scan elements of ARGV (whose length is ARGC) for option characters | |
258 | given in OPTSTRING. | |
259 | ||
260 | If an element of ARGV starts with '-', and is not exactly "-" or "--", | |
261 | then it is an option element. The characters of this element | |
262 | (aside from the initial '-') are option characters. If `getopt' | |
263 | is called repeatedly, it returns successively each of the option characters | |
264 | from each of the option elements. | |
265 | ||
266 | If `getopt' finds another option character, it returns that character, | |
267 | updating `optind' and `nextchar' so that the next call to `getopt' can | |
268 | resume the scan with the following option character or ARGV-element. | |
269 | ||
270 | If there are no more option characters, `getopt' returns `EOF'. | |
271 | Then `optind' is the index in ARGV of the first ARGV-element | |
272 | that is not an option. (The ARGV-elements have been permuted | |
273 | so that those that are not options now come last.) | |
274 | ||
275 | OPTSTRING is a string containing the legitimate option characters. | |
276 | If an option character is seen that is not listed in OPTSTRING, | |
277 | return '?' after printing an error message. If you set `opterr' to | |
278 | zero, the error message is suppressed but we still return '?'. | |
279 | ||
280 | If a char in OPTSTRING is followed by a colon, that means it wants an arg, | |
281 | so the following text in the same ARGV-element, or the text of the following | |
282 | ARGV-element, is returned in `optarg'. Two colons mean an option that | |
283 | wants an optional arg; if there is text in the current ARGV-element, | |
284 | it is returned in `optarg', otherwise `optarg' is set to zero. | |
285 | ||
286 | If OPTSTRING starts with `-' or `+', it requests different methods of | |
287 | handling the non-option ARGV-elements. | |
288 | See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above. | |
289 | ||
290 | Long-named options begin with `--' instead of `-'. | |
291 | Their names may be abbreviated as long as the abbreviation is unique | |
292 | or is an exact match for some defined option. If they have an | |
293 | argument, it follows the option name in the same ARGV-element, separated | |
294 | from the option name by a `=', or else the in next ARGV-element. | |
295 | When `getopt' finds a long-named option, it returns 0 if that option's | |
296 | `flag' field is nonzero, the value of the option's `val' field | |
297 | if the `flag' field is zero. | |
298 | ||
299 | The elements of ARGV aren't really const, because we permute them. | |
300 | But we pretend they're const in the prototype to be compatible | |
301 | with other systems. | |
302 | ||
303 | LONGOPTS is a vector of `struct option' terminated by an | |
304 | element containing a name which is zero. | |
305 | ||
306 | LONGIND returns the index in LONGOPT of the long-named option found. | |
307 | It is only valid when a long-named option has been found by the most | |
308 | recent call. | |
309 | ||
310 | If LONG_ONLY is nonzero, '-' as well as '--' can introduce | |
311 | long-named options. */ | |
312 | ||
313 | int | |
314 | _getopt_internal (argc, argv, optstring, longopts, longind, long_only) | |
315 | int argc; | |
316 | char *const *argv; | |
317 | const char *optstring; | |
318 | const struct option *longopts; | |
319 | int *longind; | |
320 | int long_only; | |
321 | { | |
322 | int option_index; | |
323 | ||
324 | optarg = 0; | |
325 | ||
326 | /* Initialize the internal data when the first call is made. | |
327 | Start processing options with ARGV-element 1 (since ARGV-element 0 | |
328 | is the program name); the sequence of previously skipped | |
329 | non-option ARGV-elements is empty. */ | |
330 | ||
331 | if (optind == 0) | |
332 | { | |
333 | first_nonopt = last_nonopt = optind = 1; | |
334 | ||
335 | nextchar = NULL; | |
336 | ||
337 | /* Determine how to handle the ordering of options and nonoptions. */ | |
338 | ||
339 | if (optstring[0] == '-') | |
340 | { | |
341 | ordering = RETURN_IN_ORDER; | |
342 | ++optstring; | |
343 | } | |
344 | else if (optstring[0] == '+') | |
345 | { | |
346 | ordering = REQUIRE_ORDER; | |
347 | ++optstring; | |
348 | } | |
349 | else if (getenv ("POSIXLY_CORRECT") != NULL) | |
350 | ordering = REQUIRE_ORDER; | |
351 | else | |
352 | ordering = PERMUTE; | |
353 | } | |
354 | ||
355 | if (nextchar == NULL || *nextchar == '\0') | |
356 | { | |
357 | if (ordering == PERMUTE) | |
358 | { | |
359 | /* If we have just processed some options following some non-options, | |
360 | exchange them so that the options come first. */ | |
361 | ||
362 | if (first_nonopt != last_nonopt && last_nonopt != optind) | |
363 | exchange ((char **) argv); | |
364 | else if (last_nonopt != optind) | |
365 | first_nonopt = optind; | |
366 | ||
367 | /* Now skip any additional non-options | |
368 | and extend the range of non-options previously skipped. */ | |
369 | ||
370 | while (optind < argc | |
371 | && (argv[optind][0] != '-' || argv[optind][1] == '\0') | |
372 | #ifdef GETOPT_COMPAT | |
373 | && (longopts == NULL | |
374 | || argv[optind][0] != '+' || argv[optind][1] == '\0') | |
375 | #endif /* GETOPT_COMPAT */ | |
376 | ) | |
377 | optind++; | |
378 | last_nonopt = optind; | |
379 | } | |
380 | ||
381 | /* Special ARGV-element `--' means premature end of options. | |
382 | Skip it like a null option, | |
383 | then exchange with previous non-options as if it were an option, | |
384 | then skip everything else like a non-option. */ | |
385 | ||
386 | if (optind != argc && !strcmp (argv[optind], "--")) | |
387 | { | |
388 | optind++; | |
389 | ||
390 | if (first_nonopt != last_nonopt && last_nonopt != optind) | |
391 | exchange ((char **) argv); | |
392 | else if (first_nonopt == last_nonopt) | |
393 | first_nonopt = optind; | |
394 | last_nonopt = argc; | |
395 | ||
396 | optind = argc; | |
397 | } | |
398 | ||
399 | /* If we have done all the ARGV-elements, stop the scan | |
400 | and back over any non-options that we skipped and permuted. */ | |
401 | ||
402 | if (optind == argc) | |
403 | { | |
404 | /* Set the next-arg-index to point at the non-options | |
405 | that we previously skipped, so the caller will digest them. */ | |
406 | if (first_nonopt != last_nonopt) | |
407 | optind = first_nonopt; | |
408 | return EOF; | |
409 | } | |
410 | ||
411 | /* If we have come to a non-option and did not permute it, | |
412 | either stop the scan or describe it to the caller and pass it by. */ | |
413 | ||
414 | if ((argv[optind][0] != '-' || argv[optind][1] == '\0') | |
415 | #ifdef GETOPT_COMPAT | |
416 | && (longopts == NULL | |
417 | || argv[optind][0] != '+' || argv[optind][1] == '\0') | |
418 | #endif /* GETOPT_COMPAT */ | |
419 | ) | |
420 | { | |
421 | if (ordering == REQUIRE_ORDER) | |
422 | return EOF; | |
423 | optarg = argv[optind++]; | |
424 | return 1; | |
425 | } | |
426 | ||
427 | /* We have found another option-ARGV-element. | |
428 | Start decoding its characters. */ | |
429 | ||
430 | nextchar = (argv[optind] + 1 | |
431 | + (longopts != NULL && argv[optind][1] == '-')); | |
432 | } | |
433 | ||
434 | if (longopts != NULL | |
435 | && ((argv[optind][0] == '-' | |
436 | && (argv[optind][1] == '-' || long_only)) | |
437 | #ifdef GETOPT_COMPAT | |
438 | || argv[optind][0] == '+' | |
439 | #endif /* GETOPT_COMPAT */ | |
440 | )) | |
441 | { | |
442 | const struct option *p; | |
443 | char *s = nextchar; | |
444 | int exact = 0; | |
445 | int ambig = 0; | |
446 | const struct option *pfound = NULL; | |
447 | int indfound; | |
448 | ||
449 | while (*s && *s != '=') | |
450 | s++; | |
451 | ||
452 | /* Test all options for either exact match or abbreviated matches. */ | |
453 | for (p = longopts, option_index = 0; p->name; | |
454 | p++, option_index++) | |
455 | if (!strncmp (p->name, nextchar, s - nextchar)) | |
456 | { | |
457 | if (s - nextchar == strlen (p->name)) | |
458 | { | |
459 | /* Exact match found. */ | |
460 | pfound = p; | |
461 | indfound = option_index; | |
462 | exact = 1; | |
463 | break; | |
464 | } | |
465 | else if (pfound == NULL) | |
466 | { | |
467 | /* First nonexact match found. */ | |
468 | pfound = p; | |
469 | indfound = option_index; | |
470 | } | |
471 | else | |
472 | /* Second nonexact match found. */ | |
473 | ambig = 1; | |
474 | } | |
475 | ||
476 | if (ambig && !exact) | |
477 | { | |
478 | if (opterr) | |
479 | fprintf (stderr, "%s: option `%s' is ambiguous\n", | |
480 | argv[0], argv[optind]); | |
481 | nextchar += strlen (nextchar); | |
482 | optind++; | |
483 | return '?'; | |
484 | } | |
485 | ||
486 | if (pfound != NULL) | |
487 | { | |
488 | option_index = indfound; | |
489 | optind++; | |
490 | if (*s) | |
491 | { | |
492 | /* Don't test has_arg with >, because some C compilers don't | |
493 | allow it to be used on enums. */ | |
494 | if (pfound->has_arg) | |
495 | optarg = s + 1; | |
496 | else | |
497 | { | |
498 | if (opterr) | |
499 | { | |
500 | if (argv[optind - 1][1] == '-') | |
501 | /* --option */ | |
502 | fprintf (stderr, | |
503 | "%s: option `--%s' doesn't allow an argument\n", | |
504 | argv[0], pfound->name); | |
505 | else | |
506 | /* +option or -option */ | |
507 | fprintf (stderr, | |
508 | "%s: option `%c%s' doesn't allow an argument\n", | |
509 | argv[0], argv[optind - 1][0], pfound->name); | |
510 | } | |
511 | nextchar += strlen (nextchar); | |
512 | return '?'; | |
513 | } | |
514 | } | |
515 | else if (pfound->has_arg == 1) | |
516 | { | |
517 | if (optind < argc) | |
518 | optarg = argv[optind++]; | |
519 | else | |
520 | { | |
521 | if (opterr) | |
522 | fprintf (stderr, "%s: option `%s' requires an argument\n", | |
523 | argv[0], argv[optind - 1]); | |
524 | nextchar += strlen (nextchar); | |
525 | return optstring[0] == ':' ? ':' : '?'; | |
526 | } | |
527 | } | |
528 | nextchar += strlen (nextchar); | |
529 | if (longind != NULL) | |
530 | *longind = option_index; | |
531 | if (pfound->flag) | |
532 | { | |
533 | *(pfound->flag) = pfound->val; | |
534 | return 0; | |
535 | } | |
536 | return pfound->val; | |
537 | } | |
538 | /* Can't find it as a long option. If this is not getopt_long_only, | |
539 | or the option starts with '--' or is not a valid short | |
540 | option, then it's an error. | |
541 | Otherwise interpret it as a short option. */ | |
542 | if (!long_only || argv[optind][1] == '-' | |
543 | #ifdef GETOPT_COMPAT | |
544 | || argv[optind][0] == '+' | |
545 | #endif /* GETOPT_COMPAT */ | |
546 | || my_index (optstring, *nextchar) == NULL) | |
547 | { | |
548 | if (opterr) | |
549 | { | |
550 | if (argv[optind][1] == '-') | |
551 | /* --option */ | |
552 | fprintf (stderr, "%s: unrecognized option `--%s'\n", | |
553 | argv[0], nextchar); | |
554 | else | |
555 | /* +option or -option */ | |
556 | fprintf (stderr, "%s: unrecognized option `%c%s'\n", | |
557 | argv[0], argv[optind][0], nextchar); | |
558 | } | |
559 | nextchar = (char *) ""; | |
560 | optind++; | |
561 | return '?'; | |
562 | } | |
563 | } | |
564 | ||
565 | /* Look at and handle the next option-character. */ | |
566 | ||
567 | { | |
568 | char c = *nextchar++; | |
569 | char *temp = my_index (optstring, c); | |
570 | ||
571 | /* Increment `optind' when we start to process its last character. */ | |
572 | if (*nextchar == '\0') | |
573 | ++optind; | |
574 | ||
575 | if (temp == NULL || c == ':') | |
576 | { | |
577 | if (opterr) | |
578 | { | |
579 | #if 0 | |
580 | if (c < 040 || c >= 0177) | |
581 | fprintf (stderr, "%s: unrecognized option, character code 0%o\n", | |
582 | argv[0], c); | |
583 | else | |
584 | fprintf (stderr, "%s: unrecognized option `-%c'\n", argv[0], c); | |
585 | #else | |
586 | /* 1003.2 specifies the format of this message. */ | |
587 | fprintf (stderr, "%s: illegal option -- %c\n", argv[0], c); | |
588 | #endif | |
589 | } | |
590 | optopt = c; | |
591 | return '?'; | |
592 | } | |
593 | if (temp[1] == ':') | |
594 | { | |
595 | if (temp[2] == ':') | |
596 | { | |
597 | /* This is an option that accepts an argument optionally. */ | |
598 | if (*nextchar != '\0') | |
599 | { | |
600 | optarg = nextchar; | |
601 | optind++; | |
602 | } | |
603 | else | |
604 | optarg = 0; | |
605 | nextchar = NULL; | |
606 | } | |
607 | else | |
608 | { | |
609 | /* This is an option that requires an argument. */ | |
610 | if (*nextchar != '\0') | |
611 | { | |
612 | optarg = nextchar; | |
613 | /* If we end this ARGV-element by taking the rest as an arg, | |
614 | we must advance to the next element now. */ | |
615 | optind++; | |
616 | } | |
617 | else if (optind == argc) | |
618 | { | |
619 | if (opterr) | |
620 | { | |
621 | #if 0 | |
622 | fprintf (stderr, "%s: option `-%c' requires an argument\n", | |
623 | argv[0], c); | |
624 | #else | |
625 | /* 1003.2 specifies the format of this message. */ | |
626 | fprintf (stderr, "%s: option requires an argument -- %c\n", | |
627 | argv[0], c); | |
628 | #endif | |
629 | } | |
630 | optopt = c; | |
631 | if (optstring[0] == ':') | |
632 | c = ':'; | |
633 | else | |
634 | c = '?'; | |
635 | } | |
636 | else | |
637 | /* We already incremented `optind' once; | |
638 | increment it again when taking next ARGV-elt as argument. */ | |
639 | optarg = argv[optind++]; | |
640 | nextchar = NULL; | |
641 | } | |
642 | } | |
643 | return c; | |
644 | } | |
645 | } | |
646 | ||
647 | int | |
648 | getopt (argc, argv, optstring) | |
649 | int argc; | |
650 | char *const *argv; | |
651 | const char *optstring; | |
652 | { | |
653 | return _getopt_internal (argc, argv, optstring, | |
654 | (const struct option *) 0, | |
655 | (int *) 0, | |
656 | 0); | |
657 | } | |
658 | ||
659 | #endif /* _LIBC or not __GNU_LIBRARY__. */ | |
660 | \f | |
661 | #ifdef TEST | |
662 | ||
663 | /* Compile with -DTEST to make an executable for use in testing | |
664 | the above definition of `getopt'. */ | |
665 | ||
666 | int | |
667 | main (argc, argv) | |
668 | int argc; | |
669 | char **argv; | |
670 | { | |
671 | int c; | |
672 | int digit_optind = 0; | |
673 | ||
674 | while (1) | |
675 | { | |
676 | int this_option_optind = optind ? optind : 1; | |
677 | ||
678 | c = getopt (argc, argv, "abc:d:0123456789"); | |
679 | if (c == EOF) | |
680 | break; | |
681 | ||
682 | switch (c) | |
683 | { | |
684 | case '0': | |
685 | case '1': | |
686 | case '2': | |
687 | case '3': | |
688 | case '4': | |
689 | case '5': | |
690 | case '6': | |
691 | case '7': | |
692 | case '8': | |
693 | case '9': | |
694 | if (digit_optind != 0 && digit_optind != this_option_optind) | |
695 | printf ("digits occur in two different argv-elements.\n"); | |
696 | digit_optind = this_option_optind; | |
697 | printf ("option %c\n", c); | |
698 | break; | |
699 | ||
700 | case 'a': | |
701 | printf ("option a\n"); | |
702 | break; | |
703 | ||
704 | case 'b': | |
705 | printf ("option b\n"); | |
706 | break; | |
707 | ||
708 | case 'c': | |
709 | printf ("option c with value `%s'\n", optarg); | |
710 | break; | |
711 | ||
712 | case '?': | |
713 | break; | |
714 | ||
715 | default: | |
716 | printf ("?? getopt returned character code 0%o ??\n", c); | |
717 | } | |
718 | } | |
719 | ||
720 | if (optind < argc) | |
721 | { | |
722 | printf ("non-option ARGV-elements: "); | |
723 | while (optind < argc) | |
724 | printf ("%s ", argv[optind++]); | |
725 | printf ("\n"); | |
726 | } | |
727 | ||
728 | exit (0); | |
729 | } | |
730 | ||
731 | #endif /* TEST */ |