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 drepper@gnu.org |
4 | before changing it! |
5 | |
6 | Copyright (C) 1987, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 2009, 2016 |
7 | Free Software Foundation, Inc. |
8 | |
9 | This program is free software: you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by |
11 | the Free Software Foundation; either version 3 of the License, or |
12 | (at your option) any 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, see <http://www.gnu.org/licenses/>. */ |
21 | |
22 | /* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>. |
23 | Ditto for AIX 3.2 and <stdlib.h>. */ |
24 | #ifndef _NO_PROTO |
25 | #define _NO_PROTO |
26 | #endif |
27 | |
28 | #ifdef HAVE_CONFIG_H |
29 | #include <config.h> |
30 | #endif |
31 | |
32 | #include <stdio.h> |
33 | |
34 | /* Comment out all this code if we are using the GNU C Library, and are not |
35 | actually compiling the library itself. This code is part of the GNU C |
36 | Library, but also included in many other GNU distributions. Compiling |
37 | and linking in this code is a waste when using the GNU C library |
38 | (especially if it is a shared library). Rather than having every GNU |
39 | program understand `configure --with-gnu-libc' and omit the object files, |
40 | it is simpler to just do this in the source for each such file. */ |
41 | |
42 | #define GETOPT_INTERFACE_VERSION 2 |
43 | #if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2 |
44 | #include <gnu-versions.h> |
45 | #if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION |
46 | #define ELIDE_CODE |
47 | #endif |
48 | #endif |
49 | |
50 | #ifndef ELIDE_CODE |
51 | |
52 | |
53 | /* Get size_t. */ |
54 | #include <stddef.h> |
55 | |
56 | /* This needs to come after some library #include |
57 | to get __GNU_LIBRARY__ defined. */ |
58 | #ifdef __GNU_LIBRARY__ |
59 | /* Don't include stdlib.h for non-GNU C libraries because some of them |
60 | contain conflicting prototypes for getopt. */ |
61 | #include <stdlib.h> |
62 | #include <unistd.h> |
63 | #endif /* GNU C library. */ |
64 | |
65 | #ifdef VMS |
66 | #include <unixlib.h> |
67 | #if HAVE_STRING_H - 0 |
68 | #include <string.h> |
69 | #endif |
70 | #endif |
71 | |
72 | #ifndef _ |
73 | /* This is for other GNU distributions with internationalized messages. |
74 | When compiling libc, the _ macro is predefined. */ |
75 | #ifdef HAVE_LIBINTL_H |
76 | # include <libintl.h> |
77 | # define _(msgid) gettext (msgid) |
78 | #else |
79 | # define _(msgid) (msgid) |
80 | #endif |
81 | #endif |
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 = NULL; |
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 -1, 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 | /* 1003.2 says this must be 1 before any call. */ |
120 | int optind = 1; |
121 | |
122 | /* Formerly, initialization of getopt depended on optind==0, which |
123 | causes problems with re-calling getopt as programs generally don't |
124 | know that. */ |
125 | |
126 | int __getopt_initialized = 0; |
127 | |
128 | /* The next char to be scanned in the option-element |
129 | in which the last option character we returned was found. |
130 | This allows us to pick up the scan where we left off. |
131 | |
132 | If this is zero, or a null string, it means resume the scan |
133 | by advancing to the next ARGV-element. */ |
134 | |
135 | static char *nextchar; |
136 | |
137 | /* Callers store zero here to inhibit the error message |
138 | for unrecognized options. */ |
139 | |
140 | int opterr = 1; |
141 | |
142 | /* Set to an option character which was unrecognized. |
143 | This must be initialized on some systems to avoid linking in the |
144 | system's own getopt implementation. */ |
145 | |
146 | int optopt = '?'; |
147 | |
148 | /* Describe how to deal with options that follow non-option ARGV-elements. |
149 | |
150 | If the caller did not specify anything, |
151 | the default is REQUIRE_ORDER if the environment variable |
152 | POSIXLY_CORRECT is defined, PERMUTE otherwise. |
153 | |
154 | REQUIRE_ORDER means don't recognize them as options; |
155 | stop option processing when the first non-option is seen. |
156 | This is what Unix does. |
157 | This mode of operation is selected by either setting the environment |
158 | variable POSIXLY_CORRECT, or using `+' as the first character |
159 | of the list of option characters. |
160 | |
161 | PERMUTE is the default. We permute the contents of ARGV as we scan, |
162 | so that eventually all the non-options are at the end. This allows options |
163 | to be given in any order, even with programs that were not written to |
164 | expect this. |
165 | |
166 | RETURN_IN_ORDER is an option available to programs that were written |
167 | to expect options and other ARGV-elements in any order and that care about |
168 | the ordering of the two. We describe each non-option ARGV-element |
169 | as if it were the argument of an option with character code 1. |
170 | Using `-' as the first character of the list of option characters |
171 | selects this mode of operation. |
172 | |
173 | The special argument `--' forces an end of option-scanning regardless |
174 | of the value of `ordering'. In the case of RETURN_IN_ORDER, only |
175 | `--' can cause `getopt' to return -1 with `optind' != ARGC. */ |
176 | |
177 | static enum |
178 | { |
179 | REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER |
180 | } ordering; |
181 | |
182 | /* Value of POSIXLY_CORRECT environment variable. */ |
183 | static char *posixly_correct; |
184 | |
185 | #ifdef __GNU_LIBRARY__ |
186 | /* We want to avoid inclusion of string.h with non-GNU libraries |
187 | because there are many ways it can cause trouble. |
188 | On some systems, it contains special magic macros that don't work |
189 | in GCC. */ |
190 | #include <string.h> |
191 | #define my_index strchr |
192 | #else |
193 | |
194 | /* Avoid depending on library functions or files |
195 | whose names are inconsistent. */ |
196 | |
197 | extern char *getenv (); |
198 | extern int strncmp (); |
199 | |
200 | static char * |
201 | my_index (const char *str, int chr) |
202 | { |
203 | while (*str) |
204 | { |
205 | if (*str == chr) |
206 | return (char *) str; |
207 | str++; |
208 | } |
209 | return 0; |
210 | } |
211 | |
212 | extern int strcmp (const char *, const char *); |
213 | extern size_t strlen (const char *); |
214 | |
215 | #endif /* not __GNU_LIBRARY__ */ |
216 | |
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 | #ifdef _LIBC |
227 | /* Bash 2.0 gives us an environment variable containing flags |
228 | indicating ARGV elements that should not be considered arguments. */ |
229 | |
230 | /* Defined in getopt_init.c */ |
231 | extern char *__getopt_nonoption_flags; |
232 | |
233 | static int nonoption_flags_max_len; |
234 | static int nonoption_flags_len; |
235 | |
236 | static int original_argc; |
237 | static char *const *original_argv; |
238 | |
239 | /* Make sure the environment variable bash 2.0 puts in the environment |
240 | is valid for the getopt call we must make sure that the ARGV passed |
241 | to getopt is that one passed to the process. */ |
242 | static void |
243 | __attribute__ ((unused)) |
244 | store_args_and_env (int argc, char *const *argv) |
245 | { |
246 | /* XXX This is no good solution. We should rather copy the args so |
247 | that we can compare them later. But we must not use malloc(3). */ |
248 | original_argc = argc; |
249 | original_argv = argv; |
250 | } |
251 | # ifdef text_set_element |
252 | text_set_element (__libc_subinit, store_args_and_env); |
253 | # endif /* text_set_element */ |
254 | |
255 | # define SWAP_FLAGS(ch1, ch2) \ |
256 | if (nonoption_flags_len > 0) \ |
257 | { \ |
258 | char __tmp = __getopt_nonoption_flags[ch1]; \ |
259 | __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \ |
260 | __getopt_nonoption_flags[ch2] = __tmp; \ |
261 | } |
262 | #else /* !_LIBC */ |
263 | # define SWAP_FLAGS(ch1, ch2) |
264 | #endif /* _LIBC */ |
265 | |
266 | /* Exchange two adjacent subsequences of ARGV. |
267 | One subsequence is elements [first_nonopt,last_nonopt) |
268 | which contains all the non-options that have been skipped so far. |
269 | The other is elements [last_nonopt,optind), which contains all |
270 | the options processed since those non-options were skipped. |
271 | |
272 | `first_nonopt' and `last_nonopt' are relocated so that they describe |
273 | the new indices of the non-options in ARGV after they are moved. */ |
274 | |
275 | static void |
276 | exchange (char **argv) |
277 | { |
278 | int bottom = first_nonopt; |
279 | int middle = last_nonopt; |
280 | int top = optind; |
281 | char *tem; |
282 | |
283 | /* Exchange the shorter segment with the far end of the longer segment. |
284 | That puts the shorter segment into the right place. |
285 | It leaves the longer segment in the right place overall, |
286 | but it consists of two parts that need to be swapped next. */ |
287 | |
288 | #ifdef _LIBC |
289 | /* First make sure the handling of the `__getopt_nonoption_flags' |
290 | string can work normally. Our top argument must be in the range |
291 | of the string. */ |
292 | if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len) |
293 | { |
294 | /* We must extend the array. The user plays games with us and |
295 | presents new arguments. */ |
296 | char *new_str = malloc (top + 1); |
297 | if (new_str == NULL) |
298 | nonoption_flags_len = nonoption_flags_max_len = 0; |
299 | else |
300 | { |
301 | memset (__mempcpy (new_str, __getopt_nonoption_flags, |
302 | nonoption_flags_max_len), |
303 | '\0', top + 1 - nonoption_flags_max_len); |
304 | nonoption_flags_max_len = top + 1; |
305 | __getopt_nonoption_flags = new_str; |
306 | } |
307 | } |
308 | #endif |
309 | |
310 | while (top > middle && middle > bottom) |
311 | { |
312 | if (top - middle > middle - bottom) |
313 | { |
314 | /* Bottom segment is the short one. */ |
315 | int len = middle - bottom; |
316 | register int i; |
317 | |
318 | /* Swap it with the top part of the top segment. */ |
319 | for (i = 0; i < len; i++) |
320 | { |
321 | tem = argv[bottom + i]; |
322 | argv[bottom + i] = argv[top - (middle - bottom) + i]; |
323 | argv[top - (middle - bottom) + i] = tem; |
324 | SWAP_FLAGS (bottom + i, top - (middle - bottom) + i); |
325 | } |
326 | /* Exclude the moved bottom segment from further swapping. */ |
327 | top -= len; |
328 | } |
329 | else |
330 | { |
331 | /* Top segment is the short one. */ |
332 | int len = top - middle; |
333 | register int i; |
334 | |
335 | /* Swap it with the bottom part of the bottom segment. */ |
336 | for (i = 0; i < len; i++) |
337 | { |
338 | tem = argv[bottom + i]; |
339 | argv[bottom + i] = argv[middle + i]; |
340 | argv[middle + i] = tem; |
341 | SWAP_FLAGS (bottom + i, middle + i); |
342 | } |
343 | /* Exclude the moved top segment from further swapping. */ |
344 | bottom += len; |
345 | } |
346 | } |
347 | |
348 | /* Update records for the slots the non-options now occupy. */ |
349 | |
350 | first_nonopt += (optind - last_nonopt); |
351 | last_nonopt = optind; |
352 | } |
353 | |
354 | /* Initialize the internal data when the first call is made. */ |
355 | |
356 | static const char * |
357 | _getopt_initialize (int argc, char *const *argv, const char *optstring) |
358 | { |
359 | /* Start processing options with ARGV-element 1 (since ARGV-element 0 |
360 | is the program name); the sequence of previously skipped |
361 | non-option ARGV-elements is empty. */ |
362 | |
363 | first_nonopt = last_nonopt = optind; |
364 | |
365 | nextchar = NULL; |
366 | |
367 | posixly_correct = getenv ("POSIXLY_CORRECT" ); |
368 | |
369 | /* Determine how to handle the ordering of options and nonoptions. */ |
370 | |
371 | if (optstring[0] == '-') |
372 | { |
373 | ordering = RETURN_IN_ORDER; |
374 | ++optstring; |
375 | } |
376 | else if (optstring[0] == '+') |
377 | { |
378 | ordering = REQUIRE_ORDER; |
379 | ++optstring; |
380 | } |
381 | else if (posixly_correct != NULL) |
382 | ordering = REQUIRE_ORDER; |
383 | else |
384 | ordering = PERMUTE; |
385 | |
386 | #ifdef _LIBC |
387 | if (posixly_correct == NULL |
388 | && argc == original_argc && argv == original_argv) |
389 | { |
390 | if (nonoption_flags_max_len == 0) |
391 | { |
392 | if (__getopt_nonoption_flags == NULL |
393 | || __getopt_nonoption_flags[0] == '\0') |
394 | nonoption_flags_max_len = -1; |
395 | else |
396 | { |
397 | const char *orig_str = __getopt_nonoption_flags; |
398 | int len = nonoption_flags_max_len = strlen (orig_str); |
399 | if (nonoption_flags_max_len < argc) |
400 | nonoption_flags_max_len = argc; |
401 | __getopt_nonoption_flags = |
402 | (char *) malloc (nonoption_flags_max_len); |
403 | if (__getopt_nonoption_flags == NULL) |
404 | nonoption_flags_max_len = -1; |
405 | else |
406 | memset (__mempcpy (__getopt_nonoption_flags, orig_str, len), |
407 | '\0', nonoption_flags_max_len - len); |
408 | } |
409 | } |
410 | nonoption_flags_len = nonoption_flags_max_len; |
411 | } |
412 | else |
413 | nonoption_flags_len = 0; |
414 | #endif |
415 | |
416 | return optstring; |
417 | } |
418 | |
419 | /* Scan elements of ARGV (whose length is ARGC) for option characters |
420 | given in OPTSTRING. |
421 | |
422 | If an element of ARGV starts with '-', and is not exactly "-" or "--", |
423 | then it is an option element. The characters of this element |
424 | (aside from the initial '-') are option characters. If `getopt' |
425 | is called repeatedly, it returns successively each of the option characters |
426 | from each of the option elements. |
427 | |
428 | If `getopt' finds another option character, it returns that character, |
429 | updating `optind' and `nextchar' so that the next call to `getopt' can |
430 | resume the scan with the following option character or ARGV-element. |
431 | |
432 | If there are no more option characters, `getopt' returns -1. |
433 | Then `optind' is the index in ARGV of the first ARGV-element |
434 | that is not an option. (The ARGV-elements have been permuted |
435 | so that those that are not options now come last.) |
436 | |
437 | OPTSTRING is a string containing the legitimate option characters. |
438 | If an option character is seen that is not listed in OPTSTRING, |
439 | return '?' after printing an error message. If you set `opterr' to |
440 | zero, the error message is suppressed but we still return '?'. |
441 | |
442 | If a char in OPTSTRING is followed by a colon, that means it wants an arg, |
443 | so the following text in the same ARGV-element, or the text of the following |
444 | ARGV-element, is returned in `optarg'. Two colons mean an option that |
445 | wants an optional arg; if there is text in the current ARGV-element, |
446 | it is returned in `optarg', otherwise `optarg' is set to zero. |
447 | |
448 | If OPTSTRING starts with `-' or `+', it requests different methods of |
449 | handling the non-option ARGV-elements. |
450 | See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above. |
451 | |
452 | Long-named options begin with `--' instead of `-'. |
453 | Their names may be abbreviated as long as the abbreviation is unique |
454 | or is an exact match for some defined option. If they have an |
455 | argument, it follows the option name in the same ARGV-element, separated |
456 | from the option name by a `=', or else the in next ARGV-element. |
457 | When `getopt' finds a long-named option, it returns 0 if that option's |
458 | `flag' field is nonzero, the value of the option's `val' field |
459 | if the `flag' field is zero. |
460 | |
461 | The elements of ARGV aren't really const, because we permute them. |
462 | But we pretend they're const in the prototype to be compatible |
463 | with other systems. |
464 | |
465 | LONGOPTS is a vector of `struct option' terminated by an |
466 | element containing a name which is zero. |
467 | |
468 | LONGIND returns the index in LONGOPT of the long-named option found. |
469 | It is only valid when a long-named option has been found by the most |
470 | recent call. |
471 | |
472 | If LONG_ONLY is nonzero, '-' as well as '--' can introduce |
473 | long-named options. */ |
474 | |
475 | int |
476 | _getopt_internal (int argc, char *const *argv, const char *optstring, |
477 | const struct option *longopts, int *longind, int long_only) |
478 | { |
479 | optarg = NULL; |
480 | |
481 | if (optind == 0 || !__getopt_initialized) |
482 | { |
483 | if (optind == 0) |
484 | optind = 1; /* Don't scan ARGV[0], the program name. */ |
485 | optstring = _getopt_initialize (argc, argv, optstring); |
486 | __getopt_initialized = 1; |
487 | } |
488 | |
489 | /* Test whether ARGV[optind] points to a non-option argument. |
490 | Either it does not have option syntax, or there is an environment flag |
491 | from the shell indicating it is not an option. The later information |
492 | is only used when the used in the GNU libc. */ |
493 | #ifdef _LIBC |
494 | #define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \ |
495 | || (optind < nonoption_flags_len \ |
496 | && __getopt_nonoption_flags[optind] == '1')) |
497 | #else |
498 | #define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0') |
499 | #endif |
500 | |
501 | if (nextchar == NULL || *nextchar == '\0') |
502 | { |
503 | /* Advance to the next ARGV-element. */ |
504 | |
505 | /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been |
506 | moved back by the user (who may also have changed the arguments). */ |
507 | if (last_nonopt > optind) |
508 | last_nonopt = optind; |
509 | if (first_nonopt > optind) |
510 | first_nonopt = optind; |
511 | |
512 | if (ordering == PERMUTE) |
513 | { |
514 | /* If we have just processed some options following some non-options, |
515 | exchange them so that the options come first. */ |
516 | |
517 | if (first_nonopt != last_nonopt && last_nonopt != optind) |
518 | exchange ((char **) argv); |
519 | else if (last_nonopt != optind) |
520 | first_nonopt = optind; |
521 | |
522 | /* Skip any additional non-options |
523 | and extend the range of non-options previously skipped. */ |
524 | |
525 | while (optind < argc && NONOPTION_P) |
526 | optind++; |
527 | last_nonopt = optind; |
528 | } |
529 | |
530 | /* The special ARGV-element `--' means premature end of options. |
531 | Skip it like a null option, |
532 | then exchange with previous non-options as if it were an option, |
533 | then skip everything else like a non-option. */ |
534 | |
535 | if (optind != argc && !strcmp (argv[optind], "--" )) |
536 | { |
537 | optind++; |
538 | |
539 | if (first_nonopt != last_nonopt && last_nonopt != optind) |
540 | exchange ((char **) argv); |
541 | else if (first_nonopt == last_nonopt) |
542 | first_nonopt = optind; |
543 | last_nonopt = argc; |
544 | |
545 | optind = argc; |
546 | } |
547 | |
548 | /* If we have done all the ARGV-elements, stop the scan |
549 | and back over any non-options that we skipped and permuted. */ |
550 | |
551 | if (optind == argc) |
552 | { |
553 | /* Set the next-arg-index to point at the non-options |
554 | that we previously skipped, so the caller will digest them. */ |
555 | if (first_nonopt != last_nonopt) |
556 | optind = first_nonopt; |
557 | return -1; |
558 | } |
559 | |
560 | /* If we have come to a non-option and did not permute it, |
561 | either stop the scan or describe it to the caller and pass it by. */ |
562 | |
563 | if (NONOPTION_P) |
564 | { |
565 | if (ordering == REQUIRE_ORDER) |
566 | return -1; |
567 | optarg = argv[optind++]; |
568 | return 1; |
569 | } |
570 | |
571 | /* We have found another option-ARGV-element. |
572 | Skip the initial punctuation. */ |
573 | |
574 | nextchar = (argv[optind] + 1 |
575 | + (longopts != NULL && argv[optind][1] == '-')); |
576 | } |
577 | |
578 | /* Decode the current option-ARGV-element. */ |
579 | |
580 | /* Check whether the ARGV-element is a long option. |
581 | |
582 | If long_only and the ARGV-element has the form "-f", where f is |
583 | a valid short option, don't consider it an abbreviated form of |
584 | a long option that starts with f. Otherwise there would be no |
585 | way to give the -f short option. |
586 | |
587 | On the other hand, if there's a long option "fubar" and |
588 | the ARGV-element is "-fu", do consider that an abbreviation of |
589 | the long option, just like "--fu", and not "-f" with arg "u". |
590 | |
591 | This distinction seems to be the most useful approach. */ |
592 | |
593 | if (longopts != NULL |
594 | && (argv[optind][1] == '-' |
595 | || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1]))))) |
596 | { |
597 | char *nameend; |
598 | const struct option *p; |
599 | const struct option *pfound = NULL; |
600 | int exact = 0; |
601 | int ambig = 0; |
602 | int indfound = -1; |
603 | int option_index; |
604 | |
605 | for (nameend = nextchar; *nameend && *nameend != '='; nameend++) |
606 | /* Do nothing. */ ; |
607 | |
608 | /* Test all long options for either exact match |
609 | or abbreviated matches. */ |
610 | for (p = longopts, option_index = 0; p->name; p++, option_index++) |
611 | if (!strncmp (p->name, nextchar, nameend - nextchar)) |
612 | { |
613 | if ((unsigned int) (nameend - nextchar) |
614 | == (unsigned int) strlen (p->name)) |
615 | { |
616 | /* Exact match found. */ |
617 | pfound = p; |
618 | indfound = option_index; |
619 | exact = 1; |
620 | break; |
621 | } |
622 | else if (pfound == NULL) |
623 | { |
624 | /* First nonexact match found. */ |
625 | pfound = p; |
626 | indfound = option_index; |
627 | } |
628 | else |
629 | /* Second or later nonexact match found. */ |
630 | ambig = 1; |
631 | } |
632 | |
633 | if (ambig && !exact) |
634 | { |
635 | if (opterr) |
636 | fprintf (stderr, _("%s: option `%s' is ambiguous\n" ), |
637 | argv[0], argv[optind]); |
638 | nextchar += strlen (nextchar); |
639 | optind++; |
640 | optopt = 0; |
641 | return '?'; |
642 | } |
643 | |
644 | if (pfound != NULL) |
645 | { |
646 | option_index = indfound; |
647 | optind++; |
648 | if (*nameend) |
649 | { |
650 | /* Don't test has_arg with >, because some C compilers don't |
651 | allow it to be used on enums. */ |
652 | if (pfound->has_arg) |
653 | optarg = nameend + 1; |
654 | else |
655 | { |
656 | if (opterr) |
657 | { |
658 | if (argv[optind - 1][1] == '-') |
659 | /* --option */ |
660 | fprintf (stderr, |
661 | _("%s: option `--%s' doesn't allow an argument\n" ), |
662 | argv[0], pfound->name); |
663 | else |
664 | /* +option or -option */ |
665 | fprintf (stderr, |
666 | _("%s: option `%c%s' doesn't allow an argument\n" ), |
667 | argv[0], argv[optind - 1][0], pfound->name); |
668 | } |
669 | |
670 | nextchar += strlen (nextchar); |
671 | |
672 | optopt = pfound->val; |
673 | return '?'; |
674 | } |
675 | } |
676 | else if (pfound->has_arg == 1) |
677 | { |
678 | if (optind < argc) |
679 | optarg = argv[optind++]; |
680 | else |
681 | { |
682 | if (opterr) |
683 | fprintf (stderr, |
684 | _("%s: option `%s' requires an argument\n" ), |
685 | argv[0], argv[optind - 1]); |
686 | nextchar += strlen (nextchar); |
687 | optopt = pfound->val; |
688 | return optstring[0] == ':' ? ':' : '?'; |
689 | } |
690 | } |
691 | nextchar += strlen (nextchar); |
692 | if (longind != NULL) |
693 | *longind = option_index; |
694 | if (pfound->flag) |
695 | { |
696 | *(pfound->flag) = pfound->val; |
697 | return 0; |
698 | } |
699 | return pfound->val; |
700 | } |
701 | |
702 | /* Can't find it as a long option. If this is not getopt_long_only, |
703 | or the option starts with '--' or is not a valid short |
704 | option, then it's an error. |
705 | Otherwise interpret it as a short option. */ |
706 | if (!long_only || argv[optind][1] == '-' |
707 | || my_index (optstring, *nextchar) == NULL) |
708 | { |
709 | if (opterr) |
710 | { |
711 | if (argv[optind][1] == '-') |
712 | /* --option */ |
713 | fprintf (stderr, _("%s: unrecognized option `--%s'\n" ), |
714 | argv[0], nextchar); |
715 | else |
716 | /* +option or -option */ |
717 | fprintf (stderr, _("%s: unrecognized option `%c%s'\n" ), |
718 | argv[0], argv[optind][0], nextchar); |
719 | } |
720 | nextchar = (char *) "" ; |
721 | optind++; |
722 | optopt = 0; |
723 | return '?'; |
724 | } |
725 | } |
726 | |
727 | /* Look at and handle the next short option-character. */ |
728 | |
729 | { |
730 | char c = *nextchar++; |
731 | char *temp = my_index (optstring, c); |
732 | |
733 | /* Increment `optind' when we start to process its last character. */ |
734 | if (*nextchar == '\0') |
735 | ++optind; |
736 | |
737 | if (temp == NULL || c == ':') |
738 | { |
739 | if (opterr) |
740 | { |
741 | if (posixly_correct) |
742 | /* 1003.2 specifies the format of this message. */ |
743 | fprintf (stderr, _("%s: illegal option -- %c\n" ), |
744 | argv[0], c); |
745 | else |
746 | fprintf (stderr, _("%s: invalid option -- %c\n" ), |
747 | argv[0], c); |
748 | } |
749 | optopt = c; |
750 | return '?'; |
751 | } |
752 | /* Convenience. Treat POSIX -W foo same as long option --foo */ |
753 | if (temp[0] == 'W' && temp[1] == ';') |
754 | { |
755 | char *nameend; |
756 | const struct option *p; |
757 | const struct option *pfound = NULL; |
758 | int exact = 0; |
759 | int ambig = 0; |
760 | int indfound = 0; |
761 | int option_index; |
762 | |
763 | /* This is an option that requires an argument. */ |
764 | if (*nextchar != '\0') |
765 | { |
766 | optarg = nextchar; |
767 | /* If we end this ARGV-element by taking the rest as an arg, |
768 | we must advance to the next element now. */ |
769 | optind++; |
770 | } |
771 | else if (optind == argc) |
772 | { |
773 | if (opterr) |
774 | { |
775 | /* 1003.2 specifies the format of this message. */ |
776 | fprintf (stderr, _("%s: option requires an argument -- %c\n" ), |
777 | argv[0], c); |
778 | } |
779 | optopt = c; |
780 | if (optstring[0] == ':') |
781 | c = ':'; |
782 | else |
783 | c = '?'; |
784 | return c; |
785 | } |
786 | else |
787 | /* We already incremented `optind' once; |
788 | increment it again when taking next ARGV-elt as argument. */ |
789 | optarg = argv[optind++]; |
790 | |
791 | /* optarg is now the argument, see if it's in the |
792 | table of longopts. */ |
793 | |
794 | for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++) |
795 | /* Do nothing. */ ; |
796 | |
797 | /* Test all long options for either exact match |
798 | or abbreviated matches. */ |
799 | for (p = longopts, option_index = 0; p->name; p++, option_index++) |
800 | if (!strncmp (p->name, nextchar, nameend - nextchar)) |
801 | { |
802 | if ((unsigned int) (nameend - nextchar) == strlen (p->name)) |
803 | { |
804 | /* Exact match found. */ |
805 | pfound = p; |
806 | indfound = option_index; |
807 | exact = 1; |
808 | break; |
809 | } |
810 | else if (pfound == NULL) |
811 | { |
812 | /* First nonexact match found. */ |
813 | pfound = p; |
814 | indfound = option_index; |
815 | } |
816 | else |
817 | /* Second or later nonexact match found. */ |
818 | ambig = 1; |
819 | } |
820 | if (ambig && !exact) |
821 | { |
822 | if (opterr) |
823 | fprintf (stderr, _("%s: option `-W %s' is ambiguous\n" ), |
824 | argv[0], argv[optind]); |
825 | nextchar += strlen (nextchar); |
826 | optind++; |
827 | return '?'; |
828 | } |
829 | if (pfound != NULL) |
830 | { |
831 | option_index = indfound; |
832 | if (*nameend) |
833 | { |
834 | /* Don't test has_arg with >, because some C compilers don't |
835 | allow it to be used on enums. */ |
836 | if (pfound->has_arg) |
837 | optarg = nameend + 1; |
838 | else |
839 | { |
840 | if (opterr) |
841 | fprintf (stderr, _("\ |
842 | %s: option `-W %s' doesn't allow an argument\n" ), |
843 | argv[0], pfound->name); |
844 | |
845 | nextchar += strlen (nextchar); |
846 | return '?'; |
847 | } |
848 | } |
849 | else if (pfound->has_arg == 1) |
850 | { |
851 | if (optind < argc) |
852 | optarg = argv[optind++]; |
853 | else |
854 | { |
855 | if (opterr) |
856 | fprintf (stderr, |
857 | _("%s: option `%s' requires an argument\n" ), |
858 | argv[0], argv[optind - 1]); |
859 | nextchar += strlen (nextchar); |
860 | return optstring[0] == ':' ? ':' : '?'; |
861 | } |
862 | } |
863 | nextchar += strlen (nextchar); |
864 | if (longind != NULL) |
865 | *longind = option_index; |
866 | if (pfound->flag) |
867 | { |
868 | *(pfound->flag) = pfound->val; |
869 | return 0; |
870 | } |
871 | return pfound->val; |
872 | } |
873 | nextchar = NULL; |
874 | return 'W'; /* Let the application handle it. */ |
875 | } |
876 | if (temp[1] == ':') |
877 | { |
878 | if (temp[2] == ':') |
879 | { |
880 | /* This is an option that accepts an argument optionally. */ |
881 | if (*nextchar != '\0') |
882 | { |
883 | optarg = nextchar; |
884 | optind++; |
885 | } |
886 | else |
887 | optarg = NULL; |
888 | nextchar = NULL; |
889 | } |
890 | else |
891 | { |
892 | /* This is an option that requires an argument. */ |
893 | if (*nextchar != '\0') |
894 | { |
895 | optarg = nextchar; |
896 | /* If we end this ARGV-element by taking the rest as an arg, |
897 | we must advance to the next element now. */ |
898 | optind++; |
899 | } |
900 | else if (optind == argc) |
901 | { |
902 | if (opterr) |
903 | { |
904 | /* 1003.2 specifies the format of this message. */ |
905 | fprintf (stderr, |
906 | _("%s: option requires an argument -- %c\n" ), |
907 | argv[0], c); |
908 | } |
909 | optopt = c; |
910 | if (optstring[0] == ':') |
911 | c = ':'; |
912 | else |
913 | c = '?'; |
914 | } |
915 | else |
916 | /* We already incremented `optind' once; |
917 | increment it again when taking next ARGV-elt as argument. */ |
918 | optarg = argv[optind++]; |
919 | nextchar = NULL; |
920 | } |
921 | } |
922 | return c; |
923 | } |
924 | } |
925 | |
926 | int |
927 | getopt (int argc, char *const *argv, const char *optstring) |
928 | { |
929 | return _getopt_internal (argc, argv, optstring, |
930 | (const struct option *) 0, |
931 | (int *) 0, |
932 | 0); |
933 | } |
934 | |
935 | #endif /* Not ELIDE_CODE. */ |
936 | |
937 | #ifdef TEST |
938 | |
939 | /* Compile with -DTEST to make an executable for use in testing |
940 | the above definition of `getopt'. */ |
941 | |
942 | int |
943 | main (int argc, char **argv) |
944 | { |
945 | int c; |
946 | int digit_optind = 0; |
947 | |
948 | while (1) |
949 | { |
950 | int this_option_optind = optind ? optind : 1; |
951 | |
952 | c = getopt (argc, argv, "abc:d:0123456789" ); |
953 | if (c == -1) |
954 | break; |
955 | |
956 | switch (c) |
957 | { |
958 | case '0': |
959 | case '1': |
960 | case '2': |
961 | case '3': |
962 | case '4': |
963 | case '5': |
964 | case '6': |
965 | case '7': |
966 | case '8': |
967 | case '9': |
968 | if (digit_optind != 0 && digit_optind != this_option_optind) |
969 | printf ("digits occur in two different argv-elements.\n" ); |
970 | digit_optind = this_option_optind; |
971 | printf ("option %c\n" , c); |
972 | break; |
973 | |
974 | case 'a': |
975 | printf ("option a\n" ); |
976 | break; |
977 | |
978 | case 'b': |
979 | printf ("option b\n" ); |
980 | break; |
981 | |
982 | case 'c': |
983 | printf ("option c with value `%s'\n" , optarg); |
984 | break; |
985 | |
986 | case '?': |
987 | break; |
988 | |
989 | default: |
990 | printf ("?? getopt returned character code 0%o ??\n" , c); |
991 | } |
992 | } |
993 | |
994 | if (optind < argc) |
995 | { |
996 | printf ("non-option ARGV-elements: " ); |
997 | while (optind < argc) |
998 | printf ("%s " , argv[optind++]); |
999 | printf ("\n" ); |
1000 | } |
1001 | |
1002 | exit (0); |
1003 | } |
1004 | |
1005 | #endif /* TEST */ |
1006 | |