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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 | |
9a722b34 | 23 | #ifdef HAVE_CONFIG_H |
c66b92b6 NW |
24 | #if defined (emacs) || defined (CONFIG_BROKETS) |
25 | /* We use <config.h> instead of "config.h" so that a compilation | |
26 | using -I. -I$srcdir will use ./config.h rather than $srcdir/config.h | |
27 | (which it would do because it found this file in $srcdir). */ | |
28 | #include <config.h> | |
29 | #else | |
9a722b34 NW |
30 | #include "config.h" |
31 | #endif | |
9a722b34 | 32 | #endif |
9a722b34 | 33 | |
c66b92b6 NW |
34 | #ifndef __STDC__ |
35 | /* This is a separate conditional since some stdc systems | |
36 | reject `defined (const)'. */ | |
37 | #ifndef const | |
9a722b34 NW |
38 | #define const |
39 | #endif | |
c66b92b6 | 40 | #endif |
9a722b34 NW |
41 | |
42 | /* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>. */ | |
43 | #ifndef _NO_PROTO | |
44 | #define _NO_PROTO | |
45 | #endif | |
46 | ||
47 | #include <stdio.h> | |
48 | ||
49 | /* Comment out all this code if we are using the GNU C Library, and are not | |
50 | actually compiling the library itself. This code is part of the GNU C | |
51 | Library, but also included in many other GNU distributions. Compiling | |
52 | and linking in this code is a waste when using the GNU C library | |
53 | (especially if it is a shared library). Rather than having every GNU | |
54 | program understand `configure --with-gnu-libc' and omit the object files, | |
55 | it is simpler to just do this in the source for each such file. */ | |
56 | ||
57 | #if defined (_LIBC) || !defined (__GNU_LIBRARY__) | |
58 | ||
59 | ||
60 | /* This needs to come after some library #include | |
61 | to get __GNU_LIBRARY__ defined. */ | |
62 | #ifdef __GNU_LIBRARY__ | |
9a722b34 NW |
63 | /* Don't include stdlib.h for non-GNU C libraries because some of them |
64 | contain conflicting prototypes for getopt. */ | |
65 | #include <stdlib.h> | |
9a722b34 NW |
66 | #endif /* GNU C library. */ |
67 | ||
68 | /* If GETOPT_COMPAT is defined, `+' as well as `--' can introduce a | |
69 | long-named option. Because this is not POSIX.2 compliant, it is | |
70 | being phased out. */ | |
71 | /* #define GETOPT_COMPAT */ | |
72 | ||
73 | /* This version of `getopt' appears to the caller like standard Unix `getopt' | |
74 | but it behaves differently for the user, since it allows the user | |
75 | to intersperse the options with the other arguments. | |
76 | ||
77 | As `getopt' works, it permutes the elements of ARGV so that, | |
78 | when it is done, all the options precede everything else. Thus | |
79 | all application programs are extended to handle flexible argument order. | |
80 | ||
81 | Setting the environment variable POSIXLY_CORRECT disables permutation. | |
82 | Then the behavior is completely standard. | |
83 | ||
84 | GNU application programs can use a third alternative mode in which | |
85 | they can distinguish the relative order of options and other arguments. */ | |
86 | ||
87 | #include "getopt.h" | |
88 | ||
89 | /* For communication from `getopt' to the caller. | |
90 | When `getopt' finds an option that takes an argument, | |
91 | the argument value is returned here. | |
92 | Also, when `ordering' is RETURN_IN_ORDER, | |
93 | each non-option ARGV-element is returned here. */ | |
94 | ||
95 | char *optarg = 0; | |
96 | ||
97 | /* Index in ARGV of the next element to be scanned. | |
98 | This is used for communication to and from the caller | |
99 | and for communication between successive calls to `getopt'. | |
100 | ||
101 | On entry to `getopt', zero means this is the first call; initialize. | |
102 | ||
103 | When `getopt' returns EOF, this is the index of the first of the | |
104 | non-option elements that the caller should itself scan. | |
105 | ||
106 | Otherwise, `optind' communicates from one call to the next | |
107 | how much of ARGV has been scanned so far. */ | |
108 | ||
109 | /* XXX 1003.2 says this must be 1 before any call. */ | |
110 | int optind = 0; | |
111 | ||
112 | /* The next char to be scanned in the option-element | |
113 | in which the last option character we returned was found. | |
114 | This allows us to pick up the scan where we left off. | |
115 | ||
116 | If this is zero, or a null string, it means resume the scan | |
117 | by advancing to the next ARGV-element. */ | |
118 | ||
119 | static char *nextchar; | |
120 | ||
121 | /* Callers store zero here to inhibit the error message | |
122 | for unrecognized options. */ | |
123 | ||
124 | int opterr = 1; | |
125 | ||
126 | /* Set to an option character which was unrecognized. | |
127 | This must be initialized on some systems to avoid linking in the | |
128 | system's own getopt implementation. */ | |
129 | ||
130 | int optopt = '?'; | |
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 | \f | |
166 | #ifdef __GNU_LIBRARY__ | |
167 | /* We want to avoid inclusion of string.h with non-GNU libraries | |
168 | because there are many ways it can cause trouble. | |
169 | On some systems, it contains special magic macros that don't work | |
170 | in GCC. */ | |
171 | #include <string.h> | |
172 | #define my_index strchr | |
9a722b34 NW |
173 | #else |
174 | ||
175 | /* Avoid depending on library functions or files | |
176 | whose names are inconsistent. */ | |
177 | ||
178 | char *getenv (); | |
179 | ||
180 | static char * | |
181 | my_index (str, chr) | |
182 | const char *str; | |
183 | int chr; | |
184 | { | |
185 | while (*str) | |
186 | { | |
187 | if (*str == chr) | |
188 | return (char *) str; | |
189 | str++; | |
190 | } | |
191 | return 0; | |
192 | } | |
193 | ||
c66b92b6 NW |
194 | /* If using GCC, we can safely declare strlen this way. |
195 | If not using GCC, it is ok not to declare it. | |
196 | (Supposedly there are some machines where it might get a warning, | |
197 | but changing this conditional to __STDC__ is too risky.) */ | |
198 | #ifdef __GNUC__ | |
199 | #ifdef IN_GCC | |
200 | #include "gstddef.h" | |
201 | #else | |
202 | #include <stddef.h> | |
203 | #endif | |
204 | extern size_t strlen (const char *); | |
205 | #endif | |
206 | ||
9a722b34 NW |
207 | #endif /* GNU C library. */ |
208 | \f | |
209 | /* Handle permutation of arguments. */ | |
210 | ||
211 | /* Describe the part of ARGV that contains non-options that have | |
212 | been skipped. `first_nonopt' is the index in ARGV of the first of them; | |
213 | `last_nonopt' is the index after the last of them. */ | |
214 | ||
215 | static int first_nonopt; | |
216 | static int last_nonopt; | |
217 | ||
218 | /* Exchange two adjacent subsequences of ARGV. | |
219 | One subsequence is elements [first_nonopt,last_nonopt) | |
220 | which contains all the non-options that have been skipped so far. | |
221 | The other is elements [last_nonopt,optind), which contains all | |
222 | the options processed since those non-options were skipped. | |
223 | ||
224 | `first_nonopt' and `last_nonopt' are relocated so that they describe | |
225 | the new indices of the non-options in ARGV after they are moved. */ | |
226 | ||
227 | static void | |
228 | exchange (argv) | |
229 | char **argv; | |
230 | { | |
c66b92b6 NW |
231 | int bottom = first_nonopt; |
232 | int middle = last_nonopt; | |
233 | int top = optind; | |
234 | char *tem; | |
9a722b34 | 235 | |
c66b92b6 NW |
236 | /* Exchange the shorter segment with the far end of the longer segment. |
237 | That puts the shorter segment into the right place. | |
238 | It leaves the longer segment in the right place overall, | |
239 | but it consists of two parts that need to be swapped next. */ | |
9a722b34 | 240 | |
c66b92b6 NW |
241 | while (top > middle && middle > bottom) |
242 | { | |
243 | if (top - middle > middle - bottom) | |
244 | { | |
245 | /* Bottom segment is the short one. */ | |
246 | int len = middle - bottom; | |
247 | register int i; | |
248 | ||
249 | /* Swap it with the top part of the top segment. */ | |
250 | for (i = 0; i < len; i++) | |
251 | { | |
252 | tem = argv[bottom + i]; | |
253 | argv[bottom + i] = argv[top - (middle - bottom) + i]; | |
254 | argv[top - (middle - bottom) + i] = tem; | |
255 | } | |
256 | /* Exclude the moved bottom segment from further swapping. */ | |
257 | top -= len; | |
258 | } | |
259 | else | |
260 | { | |
261 | /* Top segment is the short one. */ | |
262 | int len = top - middle; | |
263 | register int i; | |
264 | ||
265 | /* Swap it with the bottom part of the bottom segment. */ | |
266 | for (i = 0; i < len; i++) | |
267 | { | |
268 | tem = argv[bottom + i]; | |
269 | argv[bottom + i] = argv[middle + i]; | |
270 | argv[middle + i] = tem; | |
271 | } | |
272 | /* Exclude the moved top segment from further swapping. */ | |
273 | bottom += len; | |
274 | } | |
275 | } | |
9a722b34 NW |
276 | |
277 | /* Update records for the slots the non-options now occupy. */ | |
278 | ||
279 | first_nonopt += (optind - last_nonopt); | |
280 | last_nonopt = optind; | |
281 | } | |
282 | \f | |
283 | /* Scan elements of ARGV (whose length is ARGC) for option characters | |
284 | given in OPTSTRING. | |
285 | ||
286 | If an element of ARGV starts with '-', and is not exactly "-" or "--", | |
287 | then it is an option element. The characters of this element | |
288 | (aside from the initial '-') are option characters. If `getopt' | |
289 | is called repeatedly, it returns successively each of the option characters | |
290 | from each of the option elements. | |
291 | ||
292 | If `getopt' finds another option character, it returns that character, | |
293 | updating `optind' and `nextchar' so that the next call to `getopt' can | |
294 | resume the scan with the following option character or ARGV-element. | |
295 | ||
296 | If there are no more option characters, `getopt' returns `EOF'. | |
297 | Then `optind' is the index in ARGV of the first ARGV-element | |
298 | that is not an option. (The ARGV-elements have been permuted | |
299 | so that those that are not options now come last.) | |
300 | ||
301 | OPTSTRING is a string containing the legitimate option characters. | |
302 | If an option character is seen that is not listed in OPTSTRING, | |
303 | return '?' after printing an error message. If you set `opterr' to | |
304 | zero, the error message is suppressed but we still return '?'. | |
305 | ||
306 | If a char in OPTSTRING is followed by a colon, that means it wants an arg, | |
307 | so the following text in the same ARGV-element, or the text of the following | |
308 | ARGV-element, is returned in `optarg'. Two colons mean an option that | |
309 | wants an optional arg; if there is text in the current ARGV-element, | |
310 | it is returned in `optarg', otherwise `optarg' is set to zero. | |
311 | ||
312 | If OPTSTRING starts with `-' or `+', it requests different methods of | |
313 | handling the non-option ARGV-elements. | |
314 | See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above. | |
315 | ||
316 | Long-named options begin with `--' instead of `-'. | |
317 | Their names may be abbreviated as long as the abbreviation is unique | |
318 | or is an exact match for some defined option. If they have an | |
319 | argument, it follows the option name in the same ARGV-element, separated | |
320 | from the option name by a `=', or else the in next ARGV-element. | |
321 | When `getopt' finds a long-named option, it returns 0 if that option's | |
322 | `flag' field is nonzero, the value of the option's `val' field | |
323 | if the `flag' field is zero. | |
324 | ||
325 | The elements of ARGV aren't really const, because we permute them. | |
326 | But we pretend they're const in the prototype to be compatible | |
327 | with other systems. | |
328 | ||
329 | LONGOPTS is a vector of `struct option' terminated by an | |
330 | element containing a name which is zero. | |
331 | ||
332 | LONGIND returns the index in LONGOPT of the long-named option found. | |
333 | It is only valid when a long-named option has been found by the most | |
334 | recent call. | |
335 | ||
336 | If LONG_ONLY is nonzero, '-' as well as '--' can introduce | |
337 | long-named options. */ | |
338 | ||
339 | int | |
340 | _getopt_internal (argc, argv, optstring, longopts, longind, long_only) | |
341 | int argc; | |
342 | char *const *argv; | |
343 | const char *optstring; | |
344 | const struct option *longopts; | |
345 | int *longind; | |
346 | int long_only; | |
347 | { | |
348 | int option_index; | |
349 | ||
350 | optarg = 0; | |
351 | ||
352 | /* Initialize the internal data when the first call is made. | |
353 | Start processing options with ARGV-element 1 (since ARGV-element 0 | |
354 | is the program name); the sequence of previously skipped | |
355 | non-option ARGV-elements is empty. */ | |
356 | ||
357 | if (optind == 0) | |
358 | { | |
359 | first_nonopt = last_nonopt = optind = 1; | |
360 | ||
361 | nextchar = NULL; | |
362 | ||
363 | /* Determine how to handle the ordering of options and nonoptions. */ | |
364 | ||
365 | if (optstring[0] == '-') | |
366 | { | |
367 | ordering = RETURN_IN_ORDER; | |
368 | ++optstring; | |
369 | } | |
370 | else if (optstring[0] == '+') | |
371 | { | |
372 | ordering = REQUIRE_ORDER; | |
373 | ++optstring; | |
374 | } | |
375 | else if (getenv ("POSIXLY_CORRECT") != NULL) | |
376 | ordering = REQUIRE_ORDER; | |
377 | else | |
378 | ordering = PERMUTE; | |
379 | } | |
380 | ||
381 | if (nextchar == NULL || *nextchar == '\0') | |
382 | { | |
383 | if (ordering == PERMUTE) | |
384 | { | |
385 | /* If we have just processed some options following some non-options, | |
386 | exchange them so that the options come first. */ | |
387 | ||
388 | if (first_nonopt != last_nonopt && last_nonopt != optind) | |
389 | exchange ((char **) argv); | |
390 | else if (last_nonopt != optind) | |
391 | first_nonopt = optind; | |
392 | ||
393 | /* Now skip any additional non-options | |
394 | and extend the range of non-options previously skipped. */ | |
395 | ||
396 | while (optind < argc | |
397 | && (argv[optind][0] != '-' || argv[optind][1] == '\0') | |
398 | #ifdef GETOPT_COMPAT | |
399 | && (longopts == NULL | |
400 | || argv[optind][0] != '+' || argv[optind][1] == '\0') | |
401 | #endif /* GETOPT_COMPAT */ | |
402 | ) | |
403 | optind++; | |
404 | last_nonopt = optind; | |
405 | } | |
406 | ||
407 | /* Special ARGV-element `--' means premature end of options. | |
408 | Skip it like a null option, | |
409 | then exchange with previous non-options as if it were an option, | |
410 | then skip everything else like a non-option. */ | |
411 | ||
412 | if (optind != argc && !strcmp (argv[optind], "--")) | |
413 | { | |
414 | optind++; | |
415 | ||
416 | if (first_nonopt != last_nonopt && last_nonopt != optind) | |
417 | exchange ((char **) argv); | |
418 | else if (first_nonopt == last_nonopt) | |
419 | first_nonopt = optind; | |
420 | last_nonopt = argc; | |
421 | ||
422 | optind = argc; | |
423 | } | |
424 | ||
425 | /* If we have done all the ARGV-elements, stop the scan | |
426 | and back over any non-options that we skipped and permuted. */ | |
427 | ||
428 | if (optind == argc) | |
429 | { | |
430 | /* Set the next-arg-index to point at the non-options | |
431 | that we previously skipped, so the caller will digest them. */ | |
432 | if (first_nonopt != last_nonopt) | |
433 | optind = first_nonopt; | |
434 | return EOF; | |
435 | } | |
436 | ||
437 | /* If we have come to a non-option and did not permute it, | |
438 | either stop the scan or describe it to the caller and pass it by. */ | |
439 | ||
440 | if ((argv[optind][0] != '-' || argv[optind][1] == '\0') | |
441 | #ifdef GETOPT_COMPAT | |
442 | && (longopts == NULL | |
443 | || argv[optind][0] != '+' || argv[optind][1] == '\0') | |
444 | #endif /* GETOPT_COMPAT */ | |
445 | ) | |
446 | { | |
447 | if (ordering == REQUIRE_ORDER) | |
448 | return EOF; | |
449 | optarg = argv[optind++]; | |
450 | return 1; | |
451 | } | |
452 | ||
453 | /* We have found another option-ARGV-element. | |
454 | Start decoding its characters. */ | |
455 | ||
456 | nextchar = (argv[optind] + 1 | |
457 | + (longopts != NULL && argv[optind][1] == '-')); | |
458 | } | |
459 | ||
460 | if (longopts != NULL | |
461 | && ((argv[optind][0] == '-' | |
462 | && (argv[optind][1] == '-' || long_only)) | |
463 | #ifdef GETOPT_COMPAT | |
464 | || argv[optind][0] == '+' | |
465 | #endif /* GETOPT_COMPAT */ | |
466 | )) | |
467 | { | |
468 | const struct option *p; | |
469 | char *s = nextchar; | |
470 | int exact = 0; | |
471 | int ambig = 0; | |
472 | const struct option *pfound = NULL; | |
473 | int indfound; | |
474 | ||
475 | while (*s && *s != '=') | |
476 | s++; | |
477 | ||
478 | /* Test all options for either exact match or abbreviated matches. */ | |
479 | for (p = longopts, option_index = 0; p->name; | |
480 | p++, option_index++) | |
481 | if (!strncmp (p->name, nextchar, s - nextchar)) | |
482 | { | |
483 | if (s - nextchar == strlen (p->name)) | |
484 | { | |
485 | /* Exact match found. */ | |
486 | pfound = p; | |
487 | indfound = option_index; | |
488 | exact = 1; | |
489 | break; | |
490 | } | |
491 | else if (pfound == NULL) | |
492 | { | |
493 | /* First nonexact match found. */ | |
494 | pfound = p; | |
495 | indfound = option_index; | |
496 | } | |
497 | else | |
498 | /* Second nonexact match found. */ | |
499 | ambig = 1; | |
500 | } | |
501 | ||
502 | if (ambig && !exact) | |
503 | { | |
504 | if (opterr) | |
505 | fprintf (stderr, "%s: option `%s' is ambiguous\n", | |
506 | argv[0], argv[optind]); | |
507 | nextchar += strlen (nextchar); | |
508 | optind++; | |
509 | return '?'; | |
510 | } | |
511 | ||
512 | if (pfound != NULL) | |
513 | { | |
514 | option_index = indfound; | |
515 | optind++; | |
516 | if (*s) | |
517 | { | |
518 | /* Don't test has_arg with >, because some C compilers don't | |
519 | allow it to be used on enums. */ | |
520 | if (pfound->has_arg) | |
521 | optarg = s + 1; | |
522 | else | |
523 | { | |
524 | if (opterr) | |
525 | { | |
526 | if (argv[optind - 1][1] == '-') | |
527 | /* --option */ | |
528 | fprintf (stderr, | |
529 | "%s: option `--%s' doesn't allow an argument\n", | |
530 | argv[0], pfound->name); | |
531 | else | |
532 | /* +option or -option */ | |
533 | fprintf (stderr, | |
534 | "%s: option `%c%s' doesn't allow an argument\n", | |
535 | argv[0], argv[optind - 1][0], pfound->name); | |
536 | } | |
537 | nextchar += strlen (nextchar); | |
538 | return '?'; | |
539 | } | |
540 | } | |
541 | else if (pfound->has_arg == 1) | |
542 | { | |
543 | if (optind < argc) | |
544 | optarg = argv[optind++]; | |
545 | else | |
546 | { | |
547 | if (opterr) | |
548 | fprintf (stderr, "%s: option `%s' requires an argument\n", | |
549 | argv[0], argv[optind - 1]); | |
550 | nextchar += strlen (nextchar); | |
551 | return optstring[0] == ':' ? ':' : '?'; | |
552 | } | |
553 | } | |
554 | nextchar += strlen (nextchar); | |
555 | if (longind != NULL) | |
556 | *longind = option_index; | |
557 | if (pfound->flag) | |
558 | { | |
559 | *(pfound->flag) = pfound->val; | |
560 | return 0; | |
561 | } | |
562 | return pfound->val; | |
563 | } | |
564 | /* Can't find it as a long option. If this is not getopt_long_only, | |
565 | or the option starts with '--' or is not a valid short | |
566 | option, then it's an error. | |
567 | Otherwise interpret it as a short option. */ | |
568 | if (!long_only || argv[optind][1] == '-' | |
569 | #ifdef GETOPT_COMPAT | |
570 | || argv[optind][0] == '+' | |
571 | #endif /* GETOPT_COMPAT */ | |
572 | || my_index (optstring, *nextchar) == NULL) | |
573 | { | |
574 | if (opterr) | |
575 | { | |
576 | if (argv[optind][1] == '-') | |
577 | /* --option */ | |
578 | fprintf (stderr, "%s: unrecognized option `--%s'\n", | |
579 | argv[0], nextchar); | |
580 | else | |
581 | /* +option or -option */ | |
582 | fprintf (stderr, "%s: unrecognized option `%c%s'\n", | |
583 | argv[0], argv[optind][0], nextchar); | |
584 | } | |
585 | nextchar = (char *) ""; | |
586 | optind++; | |
587 | return '?'; | |
588 | } | |
589 | } | |
590 | ||
591 | /* Look at and handle the next option-character. */ | |
592 | ||
593 | { | |
594 | char c = *nextchar++; | |
595 | char *temp = my_index (optstring, c); | |
596 | ||
597 | /* Increment `optind' when we start to process its last character. */ | |
598 | if (*nextchar == '\0') | |
599 | ++optind; | |
600 | ||
601 | if (temp == NULL || c == ':') | |
602 | { | |
603 | if (opterr) | |
604 | { | |
605 | #if 0 | |
606 | if (c < 040 || c >= 0177) | |
607 | fprintf (stderr, "%s: unrecognized option, character code 0%o\n", | |
608 | argv[0], c); | |
609 | else | |
610 | fprintf (stderr, "%s: unrecognized option `-%c'\n", argv[0], c); | |
611 | #else | |
612 | /* 1003.2 specifies the format of this message. */ | |
613 | fprintf (stderr, "%s: illegal option -- %c\n", argv[0], c); | |
614 | #endif | |
615 | } | |
616 | optopt = c; | |
617 | return '?'; | |
618 | } | |
619 | if (temp[1] == ':') | |
620 | { | |
621 | if (temp[2] == ':') | |
622 | { | |
623 | /* This is an option that accepts an argument optionally. */ | |
624 | if (*nextchar != '\0') | |
625 | { | |
626 | optarg = nextchar; | |
627 | optind++; | |
628 | } | |
629 | else | |
630 | optarg = 0; | |
631 | nextchar = NULL; | |
632 | } | |
633 | else | |
634 | { | |
635 | /* This is an option that requires an argument. */ | |
636 | if (*nextchar != '\0') | |
637 | { | |
638 | optarg = nextchar; | |
639 | /* If we end this ARGV-element by taking the rest as an arg, | |
640 | we must advance to the next element now. */ | |
641 | optind++; | |
642 | } | |
643 | else if (optind == argc) | |
644 | { | |
645 | if (opterr) | |
646 | { | |
647 | #if 0 | |
648 | fprintf (stderr, "%s: option `-%c' requires an argument\n", | |
649 | argv[0], c); | |
650 | #else | |
651 | /* 1003.2 specifies the format of this message. */ | |
652 | fprintf (stderr, "%s: option requires an argument -- %c\n", | |
653 | argv[0], c); | |
654 | #endif | |
655 | } | |
656 | optopt = c; | |
657 | if (optstring[0] == ':') | |
658 | c = ':'; | |
659 | else | |
660 | c = '?'; | |
661 | } | |
662 | else | |
663 | /* We already incremented `optind' once; | |
664 | increment it again when taking next ARGV-elt as argument. */ | |
665 | optarg = argv[optind++]; | |
666 | nextchar = NULL; | |
667 | } | |
668 | } | |
669 | return c; | |
670 | } | |
671 | } | |
672 | ||
673 | int | |
674 | getopt (argc, argv, optstring) | |
675 | int argc; | |
676 | char *const *argv; | |
677 | const char *optstring; | |
678 | { | |
679 | return _getopt_internal (argc, argv, optstring, | |
680 | (const struct option *) 0, | |
681 | (int *) 0, | |
682 | 0); | |
683 | } | |
684 | ||
685 | #endif /* _LIBC or not __GNU_LIBRARY__. */ | |
686 | \f | |
687 | #ifdef TEST | |
688 | ||
689 | /* Compile with -DTEST to make an executable for use in testing | |
690 | the above definition of `getopt'. */ | |
691 | ||
692 | int | |
693 | main (argc, argv) | |
694 | int argc; | |
695 | char **argv; | |
696 | { | |
697 | int c; | |
698 | int digit_optind = 0; | |
699 | ||
700 | while (1) | |
701 | { | |
702 | int this_option_optind = optind ? optind : 1; | |
703 | ||
704 | c = getopt (argc, argv, "abc:d:0123456789"); | |
705 | if (c == EOF) | |
706 | break; | |
707 | ||
708 | switch (c) | |
709 | { | |
710 | case '0': | |
711 | case '1': | |
712 | case '2': | |
713 | case '3': | |
714 | case '4': | |
715 | case '5': | |
716 | case '6': | |
717 | case '7': | |
718 | case '8': | |
719 | case '9': | |
720 | if (digit_optind != 0 && digit_optind != this_option_optind) | |
721 | printf ("digits occur in two different argv-elements.\n"); | |
722 | digit_optind = this_option_optind; | |
723 | printf ("option %c\n", c); | |
724 | break; | |
725 | ||
726 | case 'a': | |
727 | printf ("option a\n"); | |
728 | break; | |
729 | ||
730 | case 'b': | |
731 | printf ("option b\n"); | |
732 | break; | |
733 | ||
734 | case 'c': | |
735 | printf ("option c with value `%s'\n", optarg); | |
736 | break; | |
737 | ||
738 | case '?': | |
739 | break; | |
740 | ||
741 | default: | |
742 | printf ("?? getopt returned character code 0%o ??\n", c); | |
743 | } | |
744 | } | |
745 | ||
746 | if (optind < argc) | |
747 | { | |
748 | printf ("non-option ARGV-elements: "); | |
749 | while (optind < argc) | |
750 | printf ("%s ", argv[optind++]); | |
751 | printf ("\n"); | |
752 | } | |
753 | ||
754 | exit (0); | |
755 | } | |
756 | ||
757 | #endif /* TEST */ |