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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 | |
7 | Free Software Foundation, Inc. | |
8 | ||
9 | This file is part of the libiberty library. This library is free | |
10 | software; you can redistribute it and/or modify it under the | |
11 | terms of the GNU General Public License as published by the | |
12 | Free Software Foundation; either version 2, or (at your option) | |
13 | any later version. | |
14 | ||
15 | This library is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with GNU CC; see the file COPYING. If not, write to | |
22 | the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
23 | ||
24 | As a special exception, if you link this library with files | |
25 | compiled with a GNU compiler to produce an executable, this does not cause | |
26 | the resulting executable to be covered by the GNU General Public License. | |
27 | This exception does not however invalidate any other reasons why | |
28 | the executable file might be covered by the GNU General Public License. */ | |
29 | \f | |
30 | /* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>. | |
31 | Ditto for AIX 3.2 and <stdlib.h>. */ | |
32 | #ifndef _NO_PROTO | |
33 | #define _NO_PROTO | |
34 | #endif | |
35 | ||
36 | #ifdef HAVE_CONFIG_H | |
37 | #if defined (emacs) || defined (CONFIG_BROKETS) | |
38 | /* We use <config.h> instead of "config.h" so that a compilation | |
39 | using -I. -I$srcdir will use ./config.h rather than $srcdir/config.h | |
40 | (which it would do because it found this file in $srcdir). */ | |
41 | #include <config.h> | |
42 | #else | |
43 | #include "config.h" | |
44 | #endif | |
45 | #endif | |
46 | ||
47 | #ifndef __STDC__ | |
48 | /* This is a separate conditional since some stdc systems | |
49 | reject `defined (const)'. */ | |
50 | #ifndef const | |
51 | #define const | |
52 | #endif | |
53 | #endif | |
54 | ||
55 | #include <stdio.h> | |
56 | ||
57 | /* Comment out all this code if we are using the GNU C Library, and are not | |
58 | actually compiling the library itself. This code is part of the GNU C | |
59 | Library, but also included in many other GNU distributions. Compiling | |
60 | and linking in this code is a waste when using the GNU C library | |
61 | (especially if it is a shared library). Rather than having every GNU | |
62 | program understand `configure --with-gnu-libc' and omit the object files, | |
63 | it is simpler to just do this in the source for each such file. */ | |
64 | /* Many versions of the Linux C library include older, broken versions | |
65 | of these routines, which will break the linker's command-line | |
66 | parsing. */ | |
67 | ||
68 | #if defined (_LIBC) || !defined (__GNU_LIBRARY__) || defined (__linux__) | |
69 | ||
70 | ||
71 | /* This needs to come after some library #include | |
72 | to get __GNU_LIBRARY__ defined. */ | |
73 | #ifdef __GNU_LIBRARY__ | |
74 | /* Don't include stdlib.h for non-GNU C libraries because some of them | |
75 | contain conflicting prototypes for getopt. */ | |
76 | #include <stdlib.h> | |
77 | #endif /* GNU C library. */ | |
78 | ||
79 | /* This version of `getopt' appears to the caller like standard Unix `getopt' | |
80 | but it behaves differently for the user, since it allows the user | |
81 | to intersperse the options with the other arguments. | |
82 | ||
83 | As `getopt' works, it permutes the elements of ARGV so that, | |
84 | when it is done, all the options precede everything else. Thus | |
85 | all application programs are extended to handle flexible argument order. | |
86 | ||
87 | Setting the environment variable POSIXLY_CORRECT disables permutation. | |
88 | Then the behavior is completely standard. | |
89 | ||
90 | GNU application programs can use a third alternative mode in which | |
91 | they can distinguish the relative order of options and other arguments. */ | |
92 | ||
93 | #include "getopt.h" | |
94 | ||
95 | /* For communication from `getopt' to the caller. | |
96 | When `getopt' finds an option that takes an argument, | |
97 | the argument value is returned here. | |
98 | Also, when `ordering' is RETURN_IN_ORDER, | |
99 | each non-option ARGV-element is returned here. */ | |
100 | ||
101 | char *optarg = NULL; | |
102 | ||
103 | /* Index in ARGV of the next element to be scanned. | |
104 | This is used for communication to and from the caller | |
105 | and for communication between successive calls to `getopt'. | |
106 | ||
107 | On entry to `getopt', zero means this is the first call; initialize. | |
108 | ||
109 | When `getopt' returns EOF, this is the index of the first of the | |
110 | non-option elements that the caller should itself scan. | |
111 | ||
112 | Otherwise, `optind' communicates from one call to the next | |
113 | how much of ARGV has been scanned so far. */ | |
114 | ||
115 | /* XXX 1003.2 says this must be 1 before any call. */ | |
116 | int optind = 0; | |
117 | ||
118 | /* The next char to be scanned in the option-element | |
119 | in which the last option character we returned was found. | |
120 | This allows us to pick up the scan where we left off. | |
121 | ||
122 | If this is zero, or a null string, it means resume the scan | |
123 | by advancing to the next ARGV-element. */ | |
124 | ||
125 | static char *nextchar; | |
126 | ||
127 | /* Callers store zero here to inhibit the error message | |
128 | for unrecognized options. */ | |
129 | ||
130 | int opterr = 1; | |
131 | ||
132 | /* Set to an option character which was unrecognized. | |
133 | This must be initialized on some systems to avoid linking in the | |
134 | system's own getopt implementation. */ | |
135 | ||
136 | int optopt = '?'; | |
137 | ||
138 | /* Describe how to deal with options that follow non-option ARGV-elements. | |
139 | ||
140 | If the caller did not specify anything, | |
141 | the default is REQUIRE_ORDER if the environment variable | |
142 | POSIXLY_CORRECT is defined, PERMUTE otherwise. | |
143 | ||
144 | REQUIRE_ORDER means don't recognize them as options; | |
145 | stop option processing when the first non-option is seen. | |
146 | This is what Unix does. | |
147 | This mode of operation is selected by either setting the environment | |
148 | variable POSIXLY_CORRECT, or using `+' as the first character | |
149 | of the list of option characters. | |
150 | ||
151 | PERMUTE is the default. We permute the contents of ARGV as we scan, | |
152 | so that eventually all the non-options are at the end. This allows options | |
153 | to be given in any order, even with programs that were not written to | |
154 | expect this. | |
155 | ||
156 | RETURN_IN_ORDER is an option available to programs that were written | |
157 | to expect options and other ARGV-elements in any order and that care about | |
158 | the ordering of the two. We describe each non-option ARGV-element | |
159 | as if it were the argument of an option with character code 1. | |
160 | Using `-' as the first character of the list of option characters | |
161 | selects this mode of operation. | |
162 | ||
163 | The special argument `--' forces an end of option-scanning regardless | |
164 | of the value of `ordering'. In the case of RETURN_IN_ORDER, only | |
165 | `--' can cause `getopt' to return EOF with `optind' != ARGC. */ | |
166 | ||
167 | static enum | |
168 | { | |
169 | REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER | |
170 | } ordering; | |
171 | \f | |
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 | #else | |
180 | ||
181 | /* Avoid depending on library functions or files | |
182 | whose names are inconsistent. */ | |
183 | ||
184 | char *getenv (); | |
185 | ||
186 | static char * | |
187 | my_index (str, chr) | |
188 | const char *str; | |
189 | int chr; | |
190 | { | |
191 | while (*str) | |
192 | { | |
193 | if (*str == chr) | |
194 | return (char *) str; | |
195 | str++; | |
196 | } | |
197 | return 0; | |
198 | } | |
199 | ||
200 | /* If using GCC, we can safely declare strlen this way. | |
201 | If not using GCC, it is ok not to declare it. */ | |
202 | #ifdef __GNUC__ | |
203 | /* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h. | |
204 | That was relevant to code that was here before. */ | |
205 | #ifndef __STDC__ | |
206 | /* gcc with -traditional declares the built-in strlen to return int, | |
207 | and has done so at least since version 2.4.5. -- rms. */ | |
208 | extern int strlen (const char *); | |
209 | #endif /* not __STDC__ */ | |
210 | #endif /* __GNUC__ */ | |
211 | ||
212 | #endif /* not __GNU_LIBRARY__ */ | |
213 | \f | |
214 | /* Handle permutation of arguments. */ | |
215 | ||
216 | /* Describe the part of ARGV that contains non-options that have | |
217 | been skipped. `first_nonopt' is the index in ARGV of the first of them; | |
218 | `last_nonopt' is the index after the last of them. */ | |
219 | ||
220 | static int first_nonopt; | |
221 | static int last_nonopt; | |
222 | ||
223 | /* Exchange two adjacent subsequences of ARGV. | |
224 | One subsequence is elements [first_nonopt,last_nonopt) | |
225 | which contains all the non-options that have been skipped so far. | |
226 | The other is elements [last_nonopt,optind), which contains all | |
227 | the options processed since those non-options were skipped. | |
228 | ||
229 | `first_nonopt' and `last_nonopt' are relocated so that they describe | |
230 | the new indices of the non-options in ARGV after they are moved. */ | |
231 | ||
232 | static void | |
233 | exchange (argv) | |
234 | char **argv; | |
235 | { | |
236 | int bottom = first_nonopt; | |
237 | int middle = last_nonopt; | |
238 | int top = optind; | |
239 | char *tem; | |
240 | ||
241 | /* Exchange the shorter segment with the far end of the longer segment. | |
242 | That puts the shorter segment into the right place. | |
243 | It leaves the longer segment in the right place overall, | |
244 | but it consists of two parts that need to be swapped next. */ | |
245 | ||
246 | while (top > middle && middle > bottom) | |
247 | { | |
248 | if (top - middle > middle - bottom) | |
249 | { | |
250 | /* Bottom segment is the short one. */ | |
251 | int len = middle - bottom; | |
252 | register int i; | |
253 | ||
254 | /* Swap it with the top part of the top segment. */ | |
255 | for (i = 0; i < len; i++) | |
256 | { | |
257 | tem = argv[bottom + i]; | |
258 | argv[bottom + i] = argv[top - (middle - bottom) + i]; | |
259 | argv[top - (middle - bottom) + i] = tem; | |
260 | } | |
261 | /* Exclude the moved bottom segment from further swapping. */ | |
262 | top -= len; | |
263 | } | |
264 | else | |
265 | { | |
266 | /* Top segment is the short one. */ | |
267 | int len = top - middle; | |
268 | register int i; | |
269 | ||
270 | /* Swap it with the bottom part of the bottom segment. */ | |
271 | for (i = 0; i < len; i++) | |
272 | { | |
273 | tem = argv[bottom + i]; | |
274 | argv[bottom + i] = argv[middle + i]; | |
275 | argv[middle + i] = tem; | |
276 | } | |
277 | /* Exclude the moved top segment from further swapping. */ | |
278 | bottom += len; | |
279 | } | |
280 | } | |
281 | ||
282 | /* Update records for the slots the non-options now occupy. */ | |
283 | ||
284 | first_nonopt += (optind - last_nonopt); | |
285 | last_nonopt = optind; | |
286 | } | |
287 | ||
288 | /* Initialize the internal data when the first call is made. */ | |
289 | ||
290 | static const char * | |
291 | _getopt_initialize (optstring) | |
292 | const char *optstring; | |
293 | { | |
294 | /* Start processing options with ARGV-element 1 (since ARGV-element 0 | |
295 | is the program name); the sequence of previously skipped | |
296 | non-option ARGV-elements is empty. */ | |
297 | ||
298 | first_nonopt = last_nonopt = optind = 1; | |
299 | ||
300 | nextchar = NULL; | |
301 | ||
302 | /* Determine how to handle the ordering of options and nonoptions. */ | |
303 | ||
304 | if (optstring[0] == '-') | |
305 | { | |
306 | ordering = RETURN_IN_ORDER; | |
307 | ++optstring; | |
308 | } | |
309 | else if (optstring[0] == '+') | |
310 | { | |
311 | ordering = REQUIRE_ORDER; | |
312 | ++optstring; | |
313 | } | |
314 | else if (getenv ("POSIXLY_CORRECT") != NULL) | |
315 | ordering = REQUIRE_ORDER; | |
316 | else | |
317 | ordering = PERMUTE; | |
318 | ||
319 | return optstring; | |
320 | } | |
321 | \f | |
322 | /* Scan elements of ARGV (whose length is ARGC) for option characters | |
323 | given in OPTSTRING. | |
324 | ||
325 | If an element of ARGV starts with '-', and is not exactly "-" or "--", | |
326 | then it is an option element. The characters of this element | |
327 | (aside from the initial '-') are option characters. If `getopt' | |
328 | is called repeatedly, it returns successively each of the option characters | |
329 | from each of the option elements. | |
330 | ||
331 | If `getopt' finds another option character, it returns that character, | |
332 | updating `optind' and `nextchar' so that the next call to `getopt' can | |
333 | resume the scan with the following option character or ARGV-element. | |
334 | ||
335 | If there are no more option characters, `getopt' returns `EOF'. | |
336 | Then `optind' is the index in ARGV of the first ARGV-element | |
337 | that is not an option. (The ARGV-elements have been permuted | |
338 | so that those that are not options now come last.) | |
339 | ||
340 | OPTSTRING is a string containing the legitimate option characters. | |
341 | If an option character is seen that is not listed in OPTSTRING, | |
342 | return '?' after printing an error message. If you set `opterr' to | |
343 | zero, the error message is suppressed but we still return '?'. | |
344 | ||
345 | If a char in OPTSTRING is followed by a colon, that means it wants an arg, | |
346 | so the following text in the same ARGV-element, or the text of the following | |
347 | ARGV-element, is returned in `optarg'. Two colons mean an option that | |
348 | wants an optional arg; if there is text in the current ARGV-element, | |
349 | it is returned in `optarg', otherwise `optarg' is set to zero. | |
350 | ||
351 | If OPTSTRING starts with `-' or `+', it requests different methods of | |
352 | handling the non-option ARGV-elements. | |
353 | See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above. | |
354 | ||
355 | Long-named options begin with `--' instead of `-'. | |
356 | Their names may be abbreviated as long as the abbreviation is unique | |
357 | or is an exact match for some defined option. If they have an | |
358 | argument, it follows the option name in the same ARGV-element, separated | |
359 | from the option name by a `=', or else the in next ARGV-element. | |
360 | When `getopt' finds a long-named option, it returns 0 if that option's | |
361 | `flag' field is nonzero, the value of the option's `val' field | |
362 | if the `flag' field is zero. | |
363 | ||
364 | The elements of ARGV aren't really const, because we permute them. | |
365 | But we pretend they're const in the prototype to be compatible | |
366 | with other systems. | |
367 | ||
368 | LONGOPTS is a vector of `struct option' terminated by an | |
369 | element containing a name which is zero. | |
370 | ||
371 | LONGIND returns the index in LONGOPT of the long-named option found. | |
372 | It is only valid when a long-named option has been found by the most | |
373 | recent call. | |
374 | ||
375 | If LONG_ONLY is nonzero, '-' as well as '--' can introduce | |
376 | long-named options. */ | |
377 | ||
378 | int | |
379 | _getopt_internal (argc, argv, optstring, longopts, longind, long_only) | |
380 | int argc; | |
381 | char *const *argv; | |
382 | const char *optstring; | |
383 | const struct option *longopts; | |
384 | int *longind; | |
385 | int long_only; | |
386 | { | |
387 | optarg = NULL; | |
388 | ||
389 | if (optind == 0) | |
390 | optstring = _getopt_initialize (optstring); | |
391 | ||
392 | if (argc == 0) | |
393 | return EOF; | |
394 | ||
395 | if (nextchar == NULL || *nextchar == '\0') | |
396 | { | |
397 | /* Advance to the next ARGV-element. */ | |
398 | ||
399 | if (ordering == PERMUTE) | |
400 | { | |
401 | /* If we have just processed some options following some non-options, | |
402 | exchange them so that the options come first. */ | |
403 | ||
404 | if (first_nonopt != last_nonopt && last_nonopt != optind) | |
405 | exchange ((char **) argv); | |
406 | else if (last_nonopt != optind) | |
407 | first_nonopt = optind; | |
408 | ||
409 | /* Skip any additional non-options | |
410 | and extend the range of non-options previously skipped. */ | |
411 | ||
412 | while (optind < argc | |
413 | && (argv[optind][0] != '-' || argv[optind][1] == '\0')) | |
414 | optind++; | |
415 | last_nonopt = optind; | |
416 | } | |
417 | ||
418 | /* The special ARGV-element `--' means premature end of options. | |
419 | Skip it like a null option, | |
420 | then exchange with previous non-options as if it were an option, | |
421 | then skip everything else like a non-option. */ | |
422 | ||
423 | if (optind != argc && !strcmp (argv[optind], "--")) | |
424 | { | |
425 | optind++; | |
426 | ||
427 | if (first_nonopt != last_nonopt && last_nonopt != optind) | |
428 | exchange ((char **) argv); | |
429 | else if (first_nonopt == last_nonopt) | |
430 | first_nonopt = optind; | |
431 | last_nonopt = argc; | |
432 | ||
433 | optind = argc; | |
434 | } | |
435 | ||
436 | /* If we have done all the ARGV-elements, stop the scan | |
437 | and back over any non-options that we skipped and permuted. */ | |
438 | ||
439 | if (optind == argc) | |
440 | { | |
441 | /* Set the next-arg-index to point at the non-options | |
442 | that we previously skipped, so the caller will digest them. */ | |
443 | if (first_nonopt != last_nonopt) | |
444 | optind = first_nonopt; | |
445 | return EOF; | |
446 | } | |
447 | ||
448 | /* If we have come to a non-option and did not permute it, | |
449 | either stop the scan or describe it to the caller and pass it by. */ | |
450 | ||
451 | if ((argv[optind][0] != '-' || argv[optind][1] == '\0')) | |
452 | { | |
453 | if (ordering == REQUIRE_ORDER) | |
454 | return EOF; | |
455 | optarg = argv[optind++]; | |
456 | return 1; | |
457 | } | |
458 | ||
459 | /* We have found another option-ARGV-element. | |
460 | Skip the initial punctuation. */ | |
461 | ||
462 | nextchar = (argv[optind] + 1 | |
463 | + (longopts != NULL && argv[optind][1] == '-')); | |
464 | } | |
465 | ||
466 | /* Decode the current option-ARGV-element. */ | |
467 | ||
468 | /* Check whether the ARGV-element is a long option. | |
469 | ||
470 | If long_only and the ARGV-element has the form "-f", where f is | |
471 | a valid short option, don't consider it an abbreviated form of | |
472 | a long option that starts with f. Otherwise there would be no | |
473 | way to give the -f short option. | |
474 | ||
475 | On the other hand, if there's a long option "fubar" and | |
476 | the ARGV-element is "-fu", do consider that an abbreviation of | |
477 | the long option, just like "--fu", and not "-f" with arg "u". | |
478 | ||
479 | This distinction seems to be the most useful approach. */ | |
480 | ||
481 | if (longopts != NULL | |
482 | && (argv[optind][1] == '-' | |
483 | || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1]))))) | |
484 | { | |
485 | char *nameend; | |
486 | const struct option *p; | |
487 | const struct option *pfound = NULL; | |
488 | int exact = 0; | |
489 | int ambig = 0; | |
490 | int indfound; | |
491 | int option_index; | |
492 | ||
493 | for (nameend = nextchar; *nameend && *nameend != '='; nameend++) | |
494 | /* Do nothing. */ ; | |
495 | ||
496 | /* Test all long options for either exact match | |
497 | or abbreviated matches. */ | |
498 | for (p = longopts, option_index = 0; p->name; p++, option_index++) | |
499 | if (!strncmp (p->name, nextchar, nameend - nextchar)) | |
500 | { | |
501 | if (nameend - nextchar == strlen (p->name)) | |
502 | { | |
503 | /* Exact match found. */ | |
504 | pfound = p; | |
505 | indfound = option_index; | |
506 | exact = 1; | |
507 | break; | |
508 | } | |
509 | else if (pfound == NULL) | |
510 | { | |
511 | /* First nonexact match found. */ | |
512 | pfound = p; | |
513 | indfound = option_index; | |
514 | } | |
515 | else | |
516 | /* Second or later nonexact match found. */ | |
517 | ambig = 1; | |
518 | } | |
519 | ||
520 | if (ambig && !exact) | |
521 | { | |
522 | if (opterr) | |
523 | fprintf (stderr, "%s: option `%s' is ambiguous\n", | |
524 | argv[0], argv[optind]); | |
525 | nextchar += strlen (nextchar); | |
526 | optind++; | |
527 | return '?'; | |
528 | } | |
529 | ||
530 | if (pfound != NULL) | |
531 | { | |
532 | option_index = indfound; | |
533 | optind++; | |
534 | if (*nameend) | |
535 | { | |
536 | /* Don't test has_arg with >, because some C compilers don't | |
537 | allow it to be used on enums. */ | |
538 | if (pfound->has_arg) | |
539 | optarg = nameend + 1; | |
540 | else | |
541 | { | |
542 | if (opterr) | |
543 | { | |
544 | if (argv[optind - 1][1] == '-') | |
545 | /* --option */ | |
546 | fprintf (stderr, | |
547 | "%s: option `--%s' doesn't allow an argument\n", | |
548 | argv[0], pfound->name); | |
549 | else | |
550 | /* +option or -option */ | |
551 | fprintf (stderr, | |
552 | "%s: option `%c%s' doesn't allow an argument\n", | |
553 | argv[0], argv[optind - 1][0], pfound->name); | |
554 | } | |
555 | nextchar += strlen (nextchar); | |
556 | return '?'; | |
557 | } | |
558 | } | |
559 | else if (pfound->has_arg == 1) | |
560 | { | |
561 | if (optind < argc) | |
562 | optarg = argv[optind++]; | |
563 | else | |
564 | { | |
565 | if (opterr) | |
566 | fprintf (stderr, "%s: option `%s' requires an argument\n", | |
567 | argv[0], argv[optind - 1]); | |
568 | nextchar += strlen (nextchar); | |
569 | return optstring[0] == ':' ? ':' : '?'; | |
570 | } | |
571 | } | |
572 | nextchar += strlen (nextchar); | |
573 | if (longind != NULL) | |
574 | *longind = option_index; | |
575 | if (pfound->flag) | |
576 | { | |
577 | *(pfound->flag) = pfound->val; | |
578 | return 0; | |
579 | } | |
580 | return pfound->val; | |
581 | } | |
582 | ||
583 | /* Can't find it as a long option. If this is not getopt_long_only, | |
584 | or the option starts with '--' or is not a valid short | |
585 | option, then it's an error. | |
586 | Otherwise interpret it as a short option. */ | |
587 | if (!long_only || argv[optind][1] == '-' | |
588 | || my_index (optstring, *nextchar) == NULL) | |
589 | { | |
590 | if (opterr) | |
591 | { | |
592 | if (argv[optind][1] == '-') | |
593 | /* --option */ | |
594 | fprintf (stderr, "%s: unrecognized option `--%s'\n", | |
595 | argv[0], nextchar); | |
596 | else | |
597 | /* +option or -option */ | |
598 | fprintf (stderr, "%s: unrecognized option `%c%s'\n", | |
599 | argv[0], argv[optind][0], nextchar); | |
600 | } | |
601 | nextchar = (char *) ""; | |
602 | optind++; | |
603 | return '?'; | |
604 | } | |
605 | } | |
606 | ||
607 | /* Look at and handle the next short option-character. */ | |
608 | ||
609 | { | |
610 | char c = *nextchar++; | |
611 | char *temp = my_index (optstring, c); | |
612 | ||
613 | /* Increment `optind' when we start to process its last character. */ | |
614 | if (*nextchar == '\0') | |
615 | ++optind; | |
616 | ||
617 | if (temp == NULL || c == ':') | |
618 | { | |
619 | if (opterr) | |
620 | { | |
621 | /* 1003.2 specifies the format of this message. */ | |
622 | fprintf (stderr, "%s: illegal option -- %c\n", argv[0], c); | |
623 | } | |
624 | optopt = c; | |
625 | return '?'; | |
626 | } | |
627 | if (temp[1] == ':') | |
628 | { | |
629 | if (temp[2] == ':') | |
630 | { | |
631 | /* This is an option that accepts an argument optionally. */ | |
632 | if (*nextchar != '\0') | |
633 | { | |
634 | optarg = nextchar; | |
635 | optind++; | |
636 | } | |
637 | else | |
638 | optarg = NULL; | |
639 | nextchar = NULL; | |
640 | } | |
641 | else | |
642 | { | |
643 | /* This is an option that requires an argument. */ | |
644 | if (*nextchar != '\0') | |
645 | { | |
646 | optarg = nextchar; | |
647 | /* If we end this ARGV-element by taking the rest as an arg, | |
648 | we must advance to the next element now. */ | |
649 | optind++; | |
650 | } | |
651 | else if (optind == argc) | |
652 | { | |
653 | if (opterr) | |
654 | { | |
655 | /* 1003.2 specifies the format of this message. */ | |
656 | fprintf (stderr, "%s: option requires an argument -- %c\n", | |
657 | argv[0], c); | |
658 | } | |
659 | optopt = c; | |
660 | if (optstring[0] == ':') | |
661 | c = ':'; | |
662 | else | |
663 | c = '?'; | |
664 | } | |
665 | else | |
666 | /* We already incremented `optind' once; | |
667 | increment it again when taking next ARGV-elt as argument. */ | |
668 | optarg = argv[optind++]; | |
669 | nextchar = NULL; | |
670 | } | |
671 | } | |
672 | return c; | |
673 | } | |
674 | } | |
675 | ||
676 | int | |
677 | getopt (argc, argv, optstring) | |
678 | int argc; | |
679 | char *const *argv; | |
680 | const char *optstring; | |
681 | { | |
682 | return _getopt_internal (argc, argv, optstring, | |
683 | (const struct option *) 0, | |
684 | (int *) 0, | |
685 | 0); | |
686 | } | |
687 | ||
688 | #endif /* _LIBC or not __GNU_LIBRARY__. */ | |
689 | \f | |
690 | #ifdef TEST | |
691 | ||
692 | /* Compile with -DTEST to make an executable for use in testing | |
693 | the above definition of `getopt'. */ | |
694 | ||
695 | int | |
696 | main (argc, argv) | |
697 | int argc; | |
698 | char **argv; | |
699 | { | |
700 | int c; | |
701 | int digit_optind = 0; | |
702 | ||
703 | while (1) | |
704 | { | |
705 | int this_option_optind = optind ? optind : 1; | |
706 | ||
707 | c = getopt (argc, argv, "abc:d:0123456789"); | |
708 | if (c == EOF) | |
709 | break; | |
710 | ||
711 | switch (c) | |
712 | { | |
713 | case '0': | |
714 | case '1': | |
715 | case '2': | |
716 | case '3': | |
717 | case '4': | |
718 | case '5': | |
719 | case '6': | |
720 | case '7': | |
721 | case '8': | |
722 | case '9': | |
723 | if (digit_optind != 0 && digit_optind != this_option_optind) | |
724 | printf ("digits occur in two different argv-elements.\n"); | |
725 | digit_optind = this_option_optind; | |
726 | printf ("option %c\n", c); | |
727 | break; | |
728 | ||
729 | case 'a': | |
730 | printf ("option a\n"); | |
731 | break; | |
732 | ||
733 | case 'b': | |
734 | printf ("option b\n"); | |
735 | break; | |
736 | ||
737 | case 'c': | |
738 | printf ("option c with value `%s'\n", optarg); | |
739 | break; | |
740 | ||
741 | case '?': | |
742 | break; | |
743 | ||
744 | default: | |
745 | printf ("?? getopt returned character code 0%o ??\n", c); | |
746 | } | |
747 | } | |
748 | ||
749 | if (optind < argc) | |
750 | { | |
751 | printf ("non-option ARGV-elements: "); | |
752 | while (optind < argc) | |
753 | printf ("%s ", argv[optind++]); | |
754 | printf ("\n"); | |
755 | } | |
756 | ||
757 | exit (0); | |
758 | } | |
759 | ||
760 | #endif /* TEST */ |