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) 1987-2025 Free Software Foundation, Inc. |
7 | |
8 | NOTE: This source is derived from an old version taken from the GNU C |
9 | Library (glibc). |
10 | |
11 | This program is free software; you can redistribute it and/or modify it |
12 | under the terms of the GNU General Public License as published by the |
13 | Free Software Foundation; either version 2, or (at your option) any |
14 | later version. |
15 | |
16 | This program is distributed in the hope that it will be useful, |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
19 | GNU General Public License for more details. |
20 | |
21 | You should have received a copy of the GNU General Public License |
22 | along with this program; if not, write to the Free Software |
23 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, |
24 | USA. */ |
25 | |
26 | #ifdef HAVE_CONFIG_H |
27 | # include <config.h> |
28 | #endif |
29 | |
30 | #if !defined __STDC__ || !__STDC__ |
31 | /* This is a separate conditional since some stdc systems |
32 | reject `defined (const)'. */ |
33 | # ifndef const |
34 | # define const |
35 | # endif |
36 | #endif |
37 | |
38 | #include "ansidecl.h" |
39 | #include <stdio.h> |
40 | |
41 | /* Comment out all this code if we are using the GNU C Library, and are not |
42 | actually compiling the library itself. This code is part of the GNU C |
43 | Library, but also included in many other GNU distributions. Compiling |
44 | and linking in this code is a waste when using the GNU C library |
45 | (especially if it is a shared library). Rather than having every GNU |
46 | program understand `configure --with-gnu-libc' and omit the object files, |
47 | it is simpler to just do this in the source for each such file. */ |
48 | |
49 | #define GETOPT_INTERFACE_VERSION 2 |
50 | #if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2 |
51 | # include <gnu-versions.h> |
52 | # if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION |
53 | # define ELIDE_CODE |
54 | # endif |
55 | #endif |
56 | |
57 | #ifndef ELIDE_CODE |
58 | |
59 | |
60 | /* This needs to come after some library #include |
61 | to get __GNU_LIBRARY__ defined. */ |
62 | #ifdef __GNU_LIBRARY__ |
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> |
66 | # include <unistd.h> |
67 | #endif /* GNU C library. */ |
68 | |
69 | #ifdef VMS |
70 | # include <unixlib.h> |
71 | # if HAVE_STRING_H - 0 |
72 | # include <string.h> |
73 | # endif |
74 | #endif |
75 | |
76 | #ifndef _ |
77 | /* This is for other GNU distributions with internationalized messages. |
78 | When compiling libc, the _ macro is predefined. */ |
79 | # if (HAVE_LIBINTL_H && ENABLE_NLS) || defined _LIBC |
80 | # include <libintl.h> |
81 | # define _(msgid) gettext (msgid) |
82 | # else |
83 | # define _(msgid) (msgid) |
84 | # endif |
85 | #endif |
86 | |
87 | /* This version of `getopt' appears to the caller like standard Unix `getopt' |
88 | but it behaves differently for the user, since it allows the user |
89 | to intersperse the options with the other arguments. |
90 | |
91 | As `getopt' works, it permutes the elements of ARGV so that, |
92 | when it is done, all the options precede everything else. Thus |
93 | all application programs are extended to handle flexible argument order. |
94 | |
95 | Setting the environment variable POSIXLY_CORRECT disables permutation. |
96 | Then the behavior is completely standard. |
97 | |
98 | GNU application programs can use a third alternative mode in which |
99 | they can distinguish the relative order of options and other arguments. */ |
100 | |
101 | #include "getopt.h" |
102 | |
103 | /* For communication from `getopt' to the caller. |
104 | When `getopt' finds an option that takes an argument, |
105 | the argument value is returned here. |
106 | Also, when `ordering' is RETURN_IN_ORDER, |
107 | each non-option ARGV-element is returned here. */ |
108 | |
109 | char *optarg = NULL; |
110 | |
111 | /* Index in ARGV of the next element to be scanned. |
112 | This is used for communication to and from the caller |
113 | and for communication between successive calls to `getopt'. |
114 | |
115 | On entry to `getopt', zero means this is the first call; initialize. |
116 | |
117 | When `getopt' returns -1, this is the index of the first of the |
118 | non-option elements that the caller should itself scan. |
119 | |
120 | Otherwise, `optind' communicates from one call to the next |
121 | how much of ARGV has been scanned so far. */ |
122 | |
123 | /* 1003.2 says this must be 1 before any call. */ |
124 | int optind = 1; |
125 | |
126 | /* Formerly, initialization of getopt depended on optind==0, which |
127 | causes problems with re-calling getopt as programs generally don't |
128 | know that. */ |
129 | |
130 | int __getopt_initialized = 0; |
131 | |
132 | /* The next char to be scanned in the option-element |
133 | in which the last option character we returned was found. |
134 | This allows us to pick up the scan where we left off. |
135 | |
136 | If this is zero, or a null string, it means resume the scan |
137 | by advancing to the next ARGV-element. */ |
138 | |
139 | static char *nextchar; |
140 | |
141 | /* Callers store zero here to inhibit the error message |
142 | for unrecognized options. */ |
143 | |
144 | int opterr = 1; |
145 | |
146 | /* Set to an option character which was unrecognized. |
147 | This must be initialized on some systems to avoid linking in the |
148 | system's own getopt implementation. */ |
149 | |
150 | int optopt = '?'; |
151 | |
152 | /* Describe how to deal with options that follow non-option ARGV-elements. |
153 | |
154 | If the caller did not specify anything, |
155 | the default is REQUIRE_ORDER if the environment variable |
156 | POSIXLY_CORRECT is defined, PERMUTE otherwise. |
157 | |
158 | REQUIRE_ORDER means don't recognize them as options; |
159 | stop option processing when the first non-option is seen. |
160 | This is what Unix does. |
161 | This mode of operation is selected by either setting the environment |
162 | variable POSIXLY_CORRECT, or using `+' as the first character |
163 | of the list of option characters. |
164 | |
165 | PERMUTE is the default. We permute the contents of ARGV as we scan, |
166 | so that eventually all the non-options are at the end. This allows options |
167 | to be given in any order, even with programs that were not written to |
168 | expect this. |
169 | |
170 | RETURN_IN_ORDER is an option available to programs that were written |
171 | to expect options and other ARGV-elements in any order and that care about |
172 | the ordering of the two. We describe each non-option ARGV-element |
173 | as if it were the argument of an option with character code 1. |
174 | Using `-' as the first character of the list of option characters |
175 | selects this mode of operation. |
176 | |
177 | The special argument `--' forces an end of option-scanning regardless |
178 | of the value of `ordering'. In the case of RETURN_IN_ORDER, only |
179 | `--' can cause `getopt' to return -1 with `optind' != ARGC. */ |
180 | |
181 | static enum |
182 | { |
183 | REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER |
184 | } ordering; |
185 | |
186 | /* Value of POSIXLY_CORRECT environment variable. */ |
187 | static char *posixly_correct; |
188 | |
189 | #ifdef __GNU_LIBRARY__ |
190 | /* We want to avoid inclusion of string.h with non-GNU libraries |
191 | because there are many ways it can cause trouble. |
192 | On some systems, it contains special magic macros that don't work |
193 | in GCC. */ |
194 | # include <string.h> |
195 | # define my_index strchr |
196 | #else |
197 | |
198 | # if HAVE_STRING_H |
199 | # include <string.h> |
200 | # else |
201 | # if HAVE_STRINGS_H |
202 | # include <strings.h> |
203 | # endif |
204 | # endif |
205 | |
206 | /* Avoid depending on library functions or files |
207 | whose names are inconsistent. */ |
208 | |
209 | #if HAVE_STDLIB_H && HAVE_DECL_GETENV |
210 | # include <stdlib.h> |
211 | #elif !defined(getenv) |
212 | # ifdef __cplusplus |
213 | extern "C" { |
214 | # endif /* __cplusplus */ |
215 | extern char *getenv (const char *); |
216 | # ifdef __cplusplus |
217 | } |
218 | # endif /* __cplusplus */ |
219 | #endif |
220 | |
221 | static char * |
222 | my_index (const char *str, int chr) |
223 | { |
224 | while (*str) |
225 | { |
226 | if (*str == chr) |
227 | return (char *) str; |
228 | str++; |
229 | } |
230 | return 0; |
231 | } |
232 | |
233 | /* If using GCC, we can safely declare strlen this way. |
234 | If not using GCC, it is ok not to declare it. */ |
235 | #ifdef __GNUC__ |
236 | /* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h. |
237 | That was relevant to code that was here before. */ |
238 | # if (!defined __STDC__ || !__STDC__) && !defined strlen |
239 | /* gcc with -traditional declares the built-in strlen to return int, |
240 | and has done so at least since version 2.4.5. -- rms. */ |
241 | extern int strlen (const char *); |
242 | # endif /* not __STDC__ */ |
243 | #endif /* __GNUC__ */ |
244 | |
245 | #endif /* not __GNU_LIBRARY__ */ |
246 | |
247 | /* Handle permutation of arguments. */ |
248 | |
249 | /* Describe the part of ARGV that contains non-options that have |
250 | been skipped. `first_nonopt' is the index in ARGV of the first of them; |
251 | `last_nonopt' is the index after the last of them. */ |
252 | |
253 | static int first_nonopt; |
254 | static int last_nonopt; |
255 | |
256 | #ifdef _LIBC |
257 | /* Bash 2.0 gives us an environment variable containing flags |
258 | indicating ARGV elements that should not be considered arguments. */ |
259 | |
260 | /* Defined in getopt_init.c */ |
261 | extern char *__getopt_nonoption_flags; |
262 | |
263 | static int nonoption_flags_max_len; |
264 | static int nonoption_flags_len; |
265 | |
266 | static int original_argc; |
267 | static char *const *original_argv; |
268 | |
269 | /* Make sure the environment variable bash 2.0 puts in the environment |
270 | is valid for the getopt call we must make sure that the ARGV passed |
271 | to getopt is that one passed to the process. */ |
272 | static void |
273 | __attribute__ ((unused)) |
274 | store_args_and_env (int argc, char *const *argv) |
275 | { |
276 | /* XXX This is no good solution. We should rather copy the args so |
277 | that we can compare them later. But we must not use malloc(3). */ |
278 | original_argc = argc; |
279 | original_argv = argv; |
280 | } |
281 | # ifdef text_set_element |
282 | text_set_element (__libc_subinit, store_args_and_env); |
283 | # endif /* text_set_element */ |
284 | |
285 | # define SWAP_FLAGS(ch1, ch2) \ |
286 | if (nonoption_flags_len > 0) \ |
287 | { \ |
288 | char __tmp = __getopt_nonoption_flags[ch1]; \ |
289 | __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \ |
290 | __getopt_nonoption_flags[ch2] = __tmp; \ |
291 | } |
292 | #else /* !_LIBC */ |
293 | # define SWAP_FLAGS(ch1, ch2) |
294 | #endif /* _LIBC */ |
295 | |
296 | /* Exchange two adjacent subsequences of ARGV. |
297 | One subsequence is elements [first_nonopt,last_nonopt) |
298 | which contains all the non-options that have been skipped so far. |
299 | The other is elements [last_nonopt,optind), which contains all |
300 | the options processed since those non-options were skipped. |
301 | |
302 | `first_nonopt' and `last_nonopt' are relocated so that they describe |
303 | the new indices of the non-options in ARGV after they are moved. */ |
304 | |
305 | #if defined __STDC__ && __STDC__ |
306 | static void exchange (char **); |
307 | #endif |
308 | |
309 | static void |
310 | exchange (char **argv) |
311 | { |
312 | int bottom = first_nonopt; |
313 | int middle = last_nonopt; |
314 | int top = optind; |
315 | char *tem; |
316 | |
317 | /* Exchange the shorter segment with the far end of the longer segment. |
318 | That puts the shorter segment into the right place. |
319 | It leaves the longer segment in the right place overall, |
320 | but it consists of two parts that need to be swapped next. */ |
321 | |
322 | #ifdef _LIBC |
323 | /* First make sure the handling of the `__getopt_nonoption_flags' |
324 | string can work normally. Our top argument must be in the range |
325 | of the string. */ |
326 | if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len) |
327 | { |
328 | /* We must extend the array. The user plays games with us and |
329 | presents new arguments. */ |
330 | char *new_str = (char *) malloc (top + 1); |
331 | if (new_str == NULL) |
332 | nonoption_flags_len = nonoption_flags_max_len = 0; |
333 | else |
334 | { |
335 | memset (mempcpy (new_str, __getopt_nonoption_flags, |
336 | nonoption_flags_max_len), |
337 | '\0', top + 1 - nonoption_flags_max_len); |
338 | nonoption_flags_max_len = top + 1; |
339 | __getopt_nonoption_flags = new_str; |
340 | } |
341 | } |
342 | #endif |
343 | |
344 | while (top > middle && middle > bottom) |
345 | { |
346 | if (top - middle > middle - bottom) |
347 | { |
348 | /* Bottom segment is the short one. */ |
349 | int len = middle - bottom; |
350 | register int i; |
351 | |
352 | /* Swap it with the top part of the top segment. */ |
353 | for (i = 0; i < len; i++) |
354 | { |
355 | tem = argv[bottom + i]; |
356 | argv[bottom + i] = argv[top - (middle - bottom) + i]; |
357 | argv[top - (middle - bottom) + i] = tem; |
358 | SWAP_FLAGS (bottom + i, top - (middle - bottom) + i); |
359 | } |
360 | /* Exclude the moved bottom segment from further swapping. */ |
361 | top -= len; |
362 | } |
363 | else |
364 | { |
365 | /* Top segment is the short one. */ |
366 | int len = top - middle; |
367 | register int i; |
368 | |
369 | /* Swap it with the bottom part of the bottom segment. */ |
370 | for (i = 0; i < len; i++) |
371 | { |
372 | tem = argv[bottom + i]; |
373 | argv[bottom + i] = argv[middle + i]; |
374 | argv[middle + i] = tem; |
375 | SWAP_FLAGS (bottom + i, middle + i); |
376 | } |
377 | /* Exclude the moved top segment from further swapping. */ |
378 | bottom += len; |
379 | } |
380 | } |
381 | |
382 | /* Update records for the slots the non-options now occupy. */ |
383 | |
384 | first_nonopt += (optind - last_nonopt); |
385 | last_nonopt = optind; |
386 | } |
387 | |
388 | /* Initialize the internal data when the first call is made. */ |
389 | |
390 | #if defined __STDC__ && __STDC__ |
391 | static const char *_getopt_initialize (int, char *const *, const char *); |
392 | #endif |
393 | static const char * |
394 | _getopt_initialize (int argc ATTRIBUTE_UNUSED, |
395 | char *const *argv ATTRIBUTE_UNUSED, |
396 | const char *optstring) |
397 | { |
398 | /* Start processing options with ARGV-element 1 (since ARGV-element 0 |
399 | is the program name); the sequence of previously skipped |
400 | non-option ARGV-elements is empty. */ |
401 | |
402 | first_nonopt = last_nonopt = optind; |
403 | |
404 | nextchar = NULL; |
405 | |
406 | posixly_correct = getenv ("POSIXLY_CORRECT" ); |
407 | |
408 | /* Determine how to handle the ordering of options and nonoptions. */ |
409 | |
410 | if (optstring[0] == '-') |
411 | { |
412 | ordering = RETURN_IN_ORDER; |
413 | ++optstring; |
414 | } |
415 | else if (optstring[0] == '+') |
416 | { |
417 | ordering = REQUIRE_ORDER; |
418 | ++optstring; |
419 | } |
420 | else if (posixly_correct != NULL) |
421 | ordering = REQUIRE_ORDER; |
422 | else |
423 | ordering = PERMUTE; |
424 | |
425 | #ifdef _LIBC |
426 | if (posixly_correct == NULL |
427 | && argc == original_argc && argv == original_argv) |
428 | { |
429 | if (nonoption_flags_max_len == 0) |
430 | { |
431 | if (__getopt_nonoption_flags == NULL |
432 | || __getopt_nonoption_flags[0] == '\0') |
433 | nonoption_flags_max_len = -1; |
434 | else |
435 | { |
436 | const char *orig_str = __getopt_nonoption_flags; |
437 | int len = nonoption_flags_max_len = strlen (orig_str); |
438 | if (nonoption_flags_max_len < argc) |
439 | nonoption_flags_max_len = argc; |
440 | __getopt_nonoption_flags = |
441 | (char *) malloc (nonoption_flags_max_len); |
442 | if (__getopt_nonoption_flags == NULL) |
443 | nonoption_flags_max_len = -1; |
444 | else |
445 | memset (mempcpy (__getopt_nonoption_flags, orig_str, len), |
446 | '\0', nonoption_flags_max_len - len); |
447 | } |
448 | } |
449 | nonoption_flags_len = nonoption_flags_max_len; |
450 | } |
451 | else |
452 | nonoption_flags_len = 0; |
453 | #endif |
454 | |
455 | return optstring; |
456 | } |
457 | |
458 | /* Scan elements of ARGV (whose length is ARGC) for option characters |
459 | given in OPTSTRING. |
460 | |
461 | If an element of ARGV starts with '-', and is not exactly "-" or "--", |
462 | then it is an option element. The characters of this element |
463 | (aside from the initial '-') are option characters. If `getopt' |
464 | is called repeatedly, it returns successively each of the option characters |
465 | from each of the option elements. |
466 | |
467 | If `getopt' finds another option character, it returns that character, |
468 | updating `optind' and `nextchar' so that the next call to `getopt' can |
469 | resume the scan with the following option character or ARGV-element. |
470 | |
471 | If there are no more option characters, `getopt' returns -1. |
472 | Then `optind' is the index in ARGV of the first ARGV-element |
473 | that is not an option. (The ARGV-elements have been permuted |
474 | so that those that are not options now come last.) |
475 | |
476 | OPTSTRING is a string containing the legitimate option characters. |
477 | If an option character is seen that is not listed in OPTSTRING, |
478 | return '?' after printing an error message. If you set `opterr' to |
479 | zero, the error message is suppressed but we still return '?'. |
480 | |
481 | If a char in OPTSTRING is followed by a colon, that means it wants an arg, |
482 | so the following text in the same ARGV-element, or the text of the following |
483 | ARGV-element, is returned in `optarg'. Two colons mean an option that |
484 | wants an optional arg; if there is text in the current ARGV-element, |
485 | it is returned in `optarg', otherwise `optarg' is set to zero. |
486 | |
487 | If OPTSTRING starts with `-' or `+', it requests different methods of |
488 | handling the non-option ARGV-elements. |
489 | See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above. |
490 | |
491 | Long-named options begin with `--' instead of `-'. |
492 | Their names may be abbreviated as long as the abbreviation is unique |
493 | or is an exact match for some defined option. If they have an |
494 | argument, it follows the option name in the same ARGV-element, separated |
495 | from the option name by a `=', or else the in next ARGV-element. |
496 | When `getopt' finds a long-named option, it returns 0 if that option's |
497 | `flag' field is nonzero, the value of the option's `val' field |
498 | if the `flag' field is zero. |
499 | |
500 | The elements of ARGV aren't really const, because we permute them. |
501 | But we pretend they're const in the prototype to be compatible |
502 | with other systems. |
503 | |
504 | LONGOPTS is a vector of `struct option' terminated by an |
505 | element containing a name which is zero. |
506 | |
507 | LONGIND returns the index in LONGOPT of the long-named option found. |
508 | It is only valid when a long-named option has been found by the most |
509 | recent call. |
510 | |
511 | If LONG_ONLY is nonzero, '-' as well as '--' can introduce |
512 | long-named options. */ |
513 | |
514 | int |
515 | _getopt_internal (int argc, char *const *argv, const char *optstring, |
516 | const struct option *longopts, |
517 | int *longind, int long_only) |
518 | { |
519 | optarg = NULL; |
520 | |
521 | if (optind == 0 || !__getopt_initialized) |
522 | { |
523 | if (optind == 0) |
524 | optind = 1; /* Don't scan ARGV[0], the program name. */ |
525 | optstring = _getopt_initialize (argc, argv, optstring); |
526 | __getopt_initialized = 1; |
527 | } |
528 | |
529 | /* Test whether ARGV[optind] points to a non-option argument. |
530 | Either it does not have option syntax, or there is an environment flag |
531 | from the shell indicating it is not an option. The later information |
532 | is only used when the used in the GNU libc. */ |
533 | #ifdef _LIBC |
534 | # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \ |
535 | || (optind < nonoption_flags_len \ |
536 | && __getopt_nonoption_flags[optind] == '1')) |
537 | #else |
538 | # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0') |
539 | #endif |
540 | |
541 | if (nextchar == NULL || *nextchar == '\0') |
542 | { |
543 | /* Advance to the next ARGV-element. */ |
544 | |
545 | /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been |
546 | moved back by the user (who may also have changed the arguments). */ |
547 | if (last_nonopt > optind) |
548 | last_nonopt = optind; |
549 | if (first_nonopt > optind) |
550 | first_nonopt = optind; |
551 | |
552 | if (ordering == PERMUTE) |
553 | { |
554 | /* If we have just processed some options following some non-options, |
555 | exchange them so that the options come first. */ |
556 | |
557 | if (first_nonopt != last_nonopt && last_nonopt != optind) |
558 | exchange ((char **) argv); |
559 | else if (last_nonopt != optind) |
560 | first_nonopt = optind; |
561 | |
562 | /* Skip any additional non-options |
563 | and extend the range of non-options previously skipped. */ |
564 | |
565 | while (optind < argc && NONOPTION_P) |
566 | optind++; |
567 | last_nonopt = optind; |
568 | } |
569 | |
570 | /* The special ARGV-element `--' means premature end of options. |
571 | Skip it like a null option, |
572 | then exchange with previous non-options as if it were an option, |
573 | then skip everything else like a non-option. */ |
574 | |
575 | if (optind != argc && !strcmp (argv[optind], "--" )) |
576 | { |
577 | optind++; |
578 | |
579 | if (first_nonopt != last_nonopt && last_nonopt != optind) |
580 | exchange ((char **) argv); |
581 | else if (first_nonopt == last_nonopt) |
582 | first_nonopt = optind; |
583 | last_nonopt = argc; |
584 | |
585 | optind = argc; |
586 | } |
587 | |
588 | /* If we have done all the ARGV-elements, stop the scan |
589 | and back over any non-options that we skipped and permuted. */ |
590 | |
591 | if (optind == argc) |
592 | { |
593 | /* Set the next-arg-index to point at the non-options |
594 | that we previously skipped, so the caller will digest them. */ |
595 | if (first_nonopt != last_nonopt) |
596 | optind = first_nonopt; |
597 | return -1; |
598 | } |
599 | |
600 | /* If we have come to a non-option and did not permute it, |
601 | either stop the scan or describe it to the caller and pass it by. */ |
602 | |
603 | if (NONOPTION_P) |
604 | { |
605 | if (ordering == REQUIRE_ORDER) |
606 | return -1; |
607 | optarg = argv[optind++]; |
608 | return 1; |
609 | } |
610 | |
611 | /* We have found another option-ARGV-element. |
612 | Skip the initial punctuation. */ |
613 | |
614 | nextchar = (argv[optind] + 1 |
615 | + (longopts != NULL && argv[optind][1] == '-')); |
616 | } |
617 | |
618 | /* Decode the current option-ARGV-element. */ |
619 | |
620 | /* Check whether the ARGV-element is a long option. |
621 | |
622 | If long_only and the ARGV-element has the form "-f", where f is |
623 | a valid short option, don't consider it an abbreviated form of |
624 | a long option that starts with f. Otherwise there would be no |
625 | way to give the -f short option. |
626 | |
627 | On the other hand, if there's a long option "fubar" and |
628 | the ARGV-element is "-fu", do consider that an abbreviation of |
629 | the long option, just like "--fu", and not "-f" with arg "u". |
630 | |
631 | This distinction seems to be the most useful approach. */ |
632 | |
633 | if (longopts != NULL |
634 | && (argv[optind][1] == '-' |
635 | || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1]))))) |
636 | { |
637 | char *nameend; |
638 | const struct option *p; |
639 | const struct option *pfound = NULL; |
640 | int exact = 0; |
641 | int ambig = 0; |
642 | int indfound = -1; |
643 | int option_index; |
644 | |
645 | for (nameend = nextchar; *nameend && *nameend != '='; nameend++) |
646 | /* Do nothing. */ ; |
647 | |
648 | /* Test all long options for either exact match |
649 | or abbreviated matches. */ |
650 | for (p = longopts, option_index = 0; p->name; p++, option_index++) |
651 | if (!strncmp (p->name, nextchar, nameend - nextchar)) |
652 | { |
653 | if ((unsigned int) (nameend - nextchar) |
654 | == (unsigned int) strlen (p->name)) |
655 | { |
656 | /* Exact match found. */ |
657 | pfound = p; |
658 | indfound = option_index; |
659 | exact = 1; |
660 | break; |
661 | } |
662 | else if (pfound == NULL) |
663 | { |
664 | /* First nonexact match found. */ |
665 | pfound = p; |
666 | indfound = option_index; |
667 | } |
668 | else |
669 | /* Second or later nonexact match found. */ |
670 | ambig = 1; |
671 | } |
672 | |
673 | if (ambig && !exact) |
674 | { |
675 | if (opterr) |
676 | fprintf (stderr, _("%s: option `%s' is ambiguous\n" ), |
677 | argv[0], argv[optind]); |
678 | nextchar += strlen (nextchar); |
679 | optind++; |
680 | optopt = 0; |
681 | return '?'; |
682 | } |
683 | |
684 | if (pfound != NULL) |
685 | { |
686 | option_index = indfound; |
687 | optind++; |
688 | if (*nameend) |
689 | { |
690 | /* Don't test has_arg with >, because some C compilers don't |
691 | allow it to be used on enums. */ |
692 | if (pfound->has_arg) |
693 | optarg = nameend + 1; |
694 | else |
695 | { |
696 | if (opterr) |
697 | { |
698 | if (argv[optind - 1][1] == '-') |
699 | /* --option */ |
700 | fprintf (stderr, |
701 | _("%s: option `--%s' doesn't allow an argument\n" ), |
702 | argv[0], pfound->name); |
703 | else |
704 | /* +option or -option */ |
705 | fprintf (stderr, |
706 | _("%s: option `%c%s' doesn't allow an argument\n" ), |
707 | argv[0], argv[optind - 1][0], pfound->name); |
708 | |
709 | nextchar += strlen (nextchar); |
710 | |
711 | optopt = pfound->val; |
712 | return '?'; |
713 | } |
714 | } |
715 | } |
716 | else if (pfound->has_arg == 1) |
717 | { |
718 | if (optind < argc) |
719 | optarg = argv[optind++]; |
720 | else |
721 | { |
722 | if (opterr) |
723 | fprintf (stderr, |
724 | _("%s: option `%s' requires an argument\n" ), |
725 | argv[0], argv[optind - 1]); |
726 | nextchar += strlen (nextchar); |
727 | optopt = pfound->val; |
728 | return optstring[0] == ':' ? ':' : '?'; |
729 | } |
730 | } |
731 | nextchar += strlen (nextchar); |
732 | if (longind != NULL) |
733 | *longind = option_index; |
734 | if (pfound->flag) |
735 | { |
736 | *(pfound->flag) = pfound->val; |
737 | return 0; |
738 | } |
739 | return pfound->val; |
740 | } |
741 | |
742 | /* Can't find it as a long option. If this is not getopt_long_only, |
743 | or the option starts with '--' or is not a valid short |
744 | option, then it's an error. |
745 | Otherwise interpret it as a short option. */ |
746 | if (!long_only || argv[optind][1] == '-' |
747 | || my_index (optstring, *nextchar) == NULL) |
748 | { |
749 | if (opterr) |
750 | { |
751 | if (argv[optind][1] == '-') |
752 | /* --option */ |
753 | fprintf (stderr, _("%s: unrecognized option `--%s'\n" ), |
754 | argv[0], nextchar); |
755 | else |
756 | /* +option or -option */ |
757 | fprintf (stderr, _("%s: unrecognized option `%c%s'\n" ), |
758 | argv[0], argv[optind][0], nextchar); |
759 | } |
760 | nextchar = (char *) "" ; |
761 | optind++; |
762 | optopt = 0; |
763 | return '?'; |
764 | } |
765 | } |
766 | |
767 | /* Look at and handle the next short option-character. */ |
768 | |
769 | { |
770 | char c = *nextchar++; |
771 | char *temp = my_index (optstring, c); |
772 | |
773 | /* Increment `optind' when we start to process its last character. */ |
774 | if (*nextchar == '\0') |
775 | ++optind; |
776 | |
777 | if (temp == NULL || c == ':') |
778 | { |
779 | if (opterr) |
780 | { |
781 | if (posixly_correct) |
782 | /* 1003.2 specifies the format of this message. */ |
783 | fprintf (stderr, _("%s: illegal option -- %c\n" ), |
784 | argv[0], c); |
785 | else |
786 | fprintf (stderr, _("%s: invalid option -- %c\n" ), |
787 | argv[0], c); |
788 | } |
789 | optopt = c; |
790 | return '?'; |
791 | } |
792 | /* Convenience. Treat POSIX -W foo same as long option --foo */ |
793 | if (temp[0] == 'W' && temp[1] == ';') |
794 | { |
795 | char *nameend; |
796 | const struct option *p; |
797 | const struct option *pfound = NULL; |
798 | int exact = 0; |
799 | int ambig = 0; |
800 | int indfound = 0; |
801 | int option_index; |
802 | |
803 | /* This is an option that requires an argument. */ |
804 | if (*nextchar != '\0') |
805 | { |
806 | optarg = nextchar; |
807 | /* If we end this ARGV-element by taking the rest as an arg, |
808 | we must advance to the next element now. */ |
809 | optind++; |
810 | } |
811 | else if (optind == argc) |
812 | { |
813 | if (opterr) |
814 | { |
815 | /* 1003.2 specifies the format of this message. */ |
816 | fprintf (stderr, _("%s: option requires an argument -- %c\n" ), |
817 | argv[0], c); |
818 | } |
819 | optopt = c; |
820 | if (optstring[0] == ':') |
821 | c = ':'; |
822 | else |
823 | c = '?'; |
824 | return c; |
825 | } |
826 | else |
827 | /* We already incremented `optind' once; |
828 | increment it again when taking next ARGV-elt as argument. */ |
829 | optarg = argv[optind++]; |
830 | |
831 | /* optarg is now the argument, see if it's in the |
832 | table of longopts. */ |
833 | |
834 | for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++) |
835 | /* Do nothing. */ ; |
836 | |
837 | /* Test all long options for either exact match |
838 | or abbreviated matches. */ |
839 | for (p = longopts, option_index = 0; p->name; p++, option_index++) |
840 | if (!strncmp (p->name, nextchar, nameend - nextchar)) |
841 | { |
842 | if ((unsigned int) (nameend - nextchar) == strlen (p->name)) |
843 | { |
844 | /* Exact match found. */ |
845 | pfound = p; |
846 | indfound = option_index; |
847 | exact = 1; |
848 | break; |
849 | } |
850 | else if (pfound == NULL) |
851 | { |
852 | /* First nonexact match found. */ |
853 | pfound = p; |
854 | indfound = option_index; |
855 | } |
856 | else |
857 | /* Second or later nonexact match found. */ |
858 | ambig = 1; |
859 | } |
860 | if (ambig && !exact) |
861 | { |
862 | if (opterr) |
863 | fprintf (stderr, _("%s: option `-W %s' is ambiguous\n" ), |
864 | argv[0], argv[optind]); |
865 | nextchar += strlen (nextchar); |
866 | optind++; |
867 | return '?'; |
868 | } |
869 | if (pfound != NULL) |
870 | { |
871 | option_index = indfound; |
872 | if (*nameend) |
873 | { |
874 | /* Don't test has_arg with >, because some C compilers don't |
875 | allow it to be used on enums. */ |
876 | if (pfound->has_arg) |
877 | optarg = nameend + 1; |
878 | else |
879 | { |
880 | if (opterr) |
881 | fprintf (stderr, _("\ |
882 | %s: option `-W %s' doesn't allow an argument\n" ), |
883 | argv[0], pfound->name); |
884 | |
885 | nextchar += strlen (nextchar); |
886 | return '?'; |
887 | } |
888 | } |
889 | else if (pfound->has_arg == 1) |
890 | { |
891 | if (optind < argc) |
892 | optarg = argv[optind++]; |
893 | else |
894 | { |
895 | if (opterr) |
896 | fprintf (stderr, |
897 | _("%s: option `%s' requires an argument\n" ), |
898 | argv[0], argv[optind - 1]); |
899 | nextchar += strlen (nextchar); |
900 | return optstring[0] == ':' ? ':' : '?'; |
901 | } |
902 | } |
903 | nextchar += strlen (nextchar); |
904 | if (longind != NULL) |
905 | *longind = option_index; |
906 | if (pfound->flag) |
907 | { |
908 | *(pfound->flag) = pfound->val; |
909 | return 0; |
910 | } |
911 | return pfound->val; |
912 | } |
913 | nextchar = NULL; |
914 | return 'W'; /* Let the application handle it. */ |
915 | } |
916 | if (temp[1] == ':') |
917 | { |
918 | if (temp[2] == ':') |
919 | { |
920 | /* This is an option that accepts an argument optionally. */ |
921 | if (*nextchar != '\0') |
922 | { |
923 | optarg = nextchar; |
924 | optind++; |
925 | } |
926 | else |
927 | optarg = NULL; |
928 | nextchar = NULL; |
929 | } |
930 | else |
931 | { |
932 | /* This is an option that requires an argument. */ |
933 | if (*nextchar != '\0') |
934 | { |
935 | optarg = nextchar; |
936 | /* If we end this ARGV-element by taking the rest as an arg, |
937 | we must advance to the next element now. */ |
938 | optind++; |
939 | } |
940 | else if (optind == argc) |
941 | { |
942 | if (opterr) |
943 | { |
944 | /* 1003.2 specifies the format of this message. */ |
945 | fprintf (stderr, |
946 | _("%s: option requires an argument -- %c\n" ), |
947 | argv[0], c); |
948 | } |
949 | optopt = c; |
950 | if (optstring[0] == ':') |
951 | c = ':'; |
952 | else |
953 | c = '?'; |
954 | } |
955 | else |
956 | /* We already incremented `optind' once; |
957 | increment it again when taking next ARGV-elt as argument. */ |
958 | optarg = argv[optind++]; |
959 | nextchar = NULL; |
960 | } |
961 | } |
962 | return c; |
963 | } |
964 | } |
965 | |
966 | int |
967 | getopt (int argc, char *const *argv, const char *optstring) |
968 | { |
969 | return _getopt_internal (argc, argv, optstring, |
970 | (const struct option *) 0, |
971 | (int *) 0, |
972 | 0); |
973 | } |
974 | |
975 | #endif /* Not ELIDE_CODE. */ |
976 | |
977 | #ifdef TEST |
978 | |
979 | /* Compile with -DTEST to make an executable for use in testing |
980 | the above definition of `getopt'. */ |
981 | |
982 | int |
983 | main (int argc, char **argv) |
984 | { |
985 | int c; |
986 | int digit_optind = 0; |
987 | |
988 | while (1) |
989 | { |
990 | int this_option_optind = optind ? optind : 1; |
991 | |
992 | c = getopt (argc, argv, "abc:d:0123456789" ); |
993 | if (c == -1) |
994 | break; |
995 | |
996 | switch (c) |
997 | { |
998 | case '0': |
999 | case '1': |
1000 | case '2': |
1001 | case '3': |
1002 | case '4': |
1003 | case '5': |
1004 | case '6': |
1005 | case '7': |
1006 | case '8': |
1007 | case '9': |
1008 | if (digit_optind != 0 && digit_optind != this_option_optind) |
1009 | printf ("digits occur in two different argv-elements.\n" ); |
1010 | digit_optind = this_option_optind; |
1011 | printf ("option %c\n" , c); |
1012 | break; |
1013 | |
1014 | case 'a': |
1015 | printf ("option a\n" ); |
1016 | break; |
1017 | |
1018 | case 'b': |
1019 | printf ("option b\n" ); |
1020 | break; |
1021 | |
1022 | case 'c': |
1023 | printf ("option c with value `%s'\n" , optarg); |
1024 | break; |
1025 | |
1026 | case '?': |
1027 | break; |
1028 | |
1029 | default: |
1030 | printf ("?? getopt returned character code 0%o ??\n" , c); |
1031 | } |
1032 | } |
1033 | |
1034 | if (optind < argc) |
1035 | { |
1036 | printf ("non-option ARGV-elements: " ); |
1037 | while (optind < argc) |
1038 | printf ("%s " , argv[optind++]); |
1039 | printf ("\n" ); |
1040 | } |
1041 | |
1042 | exit (0); |
1043 | } |
1044 | |
1045 | #endif /* TEST */ |
1046 | |