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252b5132 RH |
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 | ||
62ce8ace DD |
6 | Copyright (C) 1987, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98 |
7 | Free Software Foundation, Inc. | |
252b5132 | 8 | |
f6528837 DD |
9 | NOTE: This source is derived from an old version taken from the GNU C |
10 | Library (glibc). | |
252b5132 RH |
11 | |
12 | This program is free software; you can redistribute it and/or modify it | |
13 | under the terms of the GNU General Public License as published by the | |
14 | Free Software Foundation; either version 2, or (at your option) any | |
15 | later version. | |
16 | ||
17 | This program is distributed in the hope that it will be useful, | |
18 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | GNU General Public License for more details. | |
21 | ||
22 | You should have received a copy of the GNU General Public License | |
23 | along with this program; if not, write to the Free Software | |
979c05d3 | 24 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, |
252b5132 RH |
25 | USA. */ |
26 | \f | |
27 | /* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>. | |
28 | Ditto for AIX 3.2 and <stdlib.h>. */ | |
29 | #ifndef _NO_PROTO | |
30 | # define _NO_PROTO | |
31 | #endif | |
32 | ||
33 | #ifdef HAVE_CONFIG_H | |
34 | # include <config.h> | |
35 | #endif | |
36 | ||
37 | #if !defined __STDC__ || !__STDC__ | |
38 | /* This is a separate conditional since some stdc systems | |
39 | reject `defined (const)'. */ | |
40 | # ifndef const | |
41 | # define const | |
42 | # endif | |
43 | #endif | |
44 | ||
45 | #include <stdio.h> | |
46 | ||
47 | /* Comment out all this code if we are using the GNU C Library, and are not | |
48 | actually compiling the library itself. This code is part of the GNU C | |
49 | Library, but also included in many other GNU distributions. Compiling | |
50 | and linking in this code is a waste when using the GNU C library | |
51 | (especially if it is a shared library). Rather than having every GNU | |
52 | program understand `configure --with-gnu-libc' and omit the object files, | |
53 | it is simpler to just do this in the source for each such file. */ | |
54 | ||
55 | #define GETOPT_INTERFACE_VERSION 2 | |
56 | #if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2 | |
57 | # include <gnu-versions.h> | |
58 | # if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION | |
59 | # define ELIDE_CODE | |
60 | # endif | |
61 | #endif | |
62 | ||
63 | #ifndef ELIDE_CODE | |
64 | ||
65 | ||
66 | /* This needs to come after some library #include | |
67 | to get __GNU_LIBRARY__ defined. */ | |
68 | #ifdef __GNU_LIBRARY__ | |
69 | /* Don't include stdlib.h for non-GNU C libraries because some of them | |
70 | contain conflicting prototypes for getopt. */ | |
71 | # include <stdlib.h> | |
72 | # include <unistd.h> | |
73 | #endif /* GNU C library. */ | |
74 | ||
75 | #ifdef VMS | |
76 | # include <unixlib.h> | |
77 | # if HAVE_STRING_H - 0 | |
78 | # include <string.h> | |
79 | # endif | |
80 | #endif | |
81 | ||
82 | #ifndef _ | |
83 | /* This is for other GNU distributions with internationalized messages. | |
84 | When compiling libc, the _ macro is predefined. */ | |
1a78a35a | 85 | # if (HAVE_LIBINTL_H && ENABLE_NLS) || defined _LIBC |
252b5132 RH |
86 | # include <libintl.h> |
87 | # define _(msgid) gettext (msgid) | |
88 | # else | |
89 | # define _(msgid) (msgid) | |
90 | # endif | |
91 | #endif | |
92 | ||
93 | /* This version of `getopt' appears to the caller like standard Unix `getopt' | |
94 | but it behaves differently for the user, since it allows the user | |
95 | to intersperse the options with the other arguments. | |
96 | ||
97 | As `getopt' works, it permutes the elements of ARGV so that, | |
98 | when it is done, all the options precede everything else. Thus | |
99 | all application programs are extended to handle flexible argument order. | |
100 | ||
101 | Setting the environment variable POSIXLY_CORRECT disables permutation. | |
102 | Then the behavior is completely standard. | |
103 | ||
104 | GNU application programs can use a third alternative mode in which | |
105 | they can distinguish the relative order of options and other arguments. */ | |
106 | ||
107 | #include "getopt.h" | |
108 | ||
109 | /* For communication from `getopt' to the caller. | |
110 | When `getopt' finds an option that takes an argument, | |
111 | the argument value is returned here. | |
112 | Also, when `ordering' is RETURN_IN_ORDER, | |
113 | each non-option ARGV-element is returned here. */ | |
114 | ||
115 | char *optarg = NULL; | |
116 | ||
117 | /* Index in ARGV of the next element to be scanned. | |
118 | This is used for communication to and from the caller | |
119 | and for communication between successive calls to `getopt'. | |
120 | ||
121 | On entry to `getopt', zero means this is the first call; initialize. | |
122 | ||
123 | When `getopt' returns -1, this is the index of the first of the | |
124 | non-option elements that the caller should itself scan. | |
125 | ||
126 | Otherwise, `optind' communicates from one call to the next | |
127 | how much of ARGV has been scanned so far. */ | |
128 | ||
129 | /* 1003.2 says this must be 1 before any call. */ | |
130 | int optind = 1; | |
131 | ||
132 | /* Formerly, initialization of getopt depended on optind==0, which | |
133 | causes problems with re-calling getopt as programs generally don't | |
134 | know that. */ | |
135 | ||
136 | int __getopt_initialized = 0; | |
137 | ||
138 | /* The next char to be scanned in the option-element | |
139 | in which the last option character we returned was found. | |
140 | This allows us to pick up the scan where we left off. | |
141 | ||
142 | If this is zero, or a null string, it means resume the scan | |
143 | by advancing to the next ARGV-element. */ | |
144 | ||
145 | static char *nextchar; | |
146 | ||
147 | /* Callers store zero here to inhibit the error message | |
148 | for unrecognized options. */ | |
149 | ||
150 | int opterr = 1; | |
151 | ||
152 | /* Set to an option character which was unrecognized. | |
153 | This must be initialized on some systems to avoid linking in the | |
154 | system's own getopt implementation. */ | |
155 | ||
156 | int optopt = '?'; | |
157 | ||
158 | /* Describe how to deal with options that follow non-option ARGV-elements. | |
159 | ||
160 | If the caller did not specify anything, | |
161 | the default is REQUIRE_ORDER if the environment variable | |
162 | POSIXLY_CORRECT is defined, PERMUTE otherwise. | |
163 | ||
164 | REQUIRE_ORDER means don't recognize them as options; | |
165 | stop option processing when the first non-option is seen. | |
166 | This is what Unix does. | |
167 | This mode of operation is selected by either setting the environment | |
168 | variable POSIXLY_CORRECT, or using `+' as the first character | |
169 | of the list of option characters. | |
170 | ||
171 | PERMUTE is the default. We permute the contents of ARGV as we scan, | |
172 | so that eventually all the non-options are at the end. This allows options | |
173 | to be given in any order, even with programs that were not written to | |
174 | expect this. | |
175 | ||
176 | RETURN_IN_ORDER is an option available to programs that were written | |
177 | to expect options and other ARGV-elements in any order and that care about | |
178 | the ordering of the two. We describe each non-option ARGV-element | |
179 | as if it were the argument of an option with character code 1. | |
180 | Using `-' as the first character of the list of option characters | |
181 | selects this mode of operation. | |
182 | ||
183 | The special argument `--' forces an end of option-scanning regardless | |
184 | of the value of `ordering'. In the case of RETURN_IN_ORDER, only | |
185 | `--' can cause `getopt' to return -1 with `optind' != ARGC. */ | |
186 | ||
187 | static enum | |
188 | { | |
189 | REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER | |
190 | } ordering; | |
191 | ||
192 | /* Value of POSIXLY_CORRECT environment variable. */ | |
193 | static char *posixly_correct; | |
194 | \f | |
195 | #ifdef __GNU_LIBRARY__ | |
196 | /* We want to avoid inclusion of string.h with non-GNU libraries | |
197 | because there are many ways it can cause trouble. | |
198 | On some systems, it contains special magic macros that don't work | |
199 | in GCC. */ | |
200 | # include <string.h> | |
201 | # define my_index strchr | |
202 | #else | |
203 | ||
204 | # if HAVE_STRING_H | |
205 | # include <string.h> | |
206 | # else | |
207 | # if HAVE_STRINGS_H | |
208 | # include <strings.h> | |
209 | # endif | |
210 | # endif | |
211 | ||
212 | /* Avoid depending on library functions or files | |
213 | whose names are inconsistent. */ | |
214 | ||
abf6a75b DD |
215 | #if HAVE_STDLIB_H && HAVE_DECL_GETENV |
216 | # include <stdlib.h> | |
217 | #elif !defined(getenv) | |
218 | # ifdef __cplusplus | |
219 | extern "C" { | |
220 | # endif /* __cplusplus */ | |
221 | extern char *getenv (const char *); | |
222 | # ifdef __cplusplus | |
223 | } | |
224 | # endif /* __cplusplus */ | |
252b5132 RH |
225 | #endif |
226 | ||
227 | static char * | |
49b1fae4 | 228 | my_index (const char *str, int chr) |
252b5132 RH |
229 | { |
230 | while (*str) | |
231 | { | |
232 | if (*str == chr) | |
233 | return (char *) str; | |
234 | str++; | |
235 | } | |
236 | return 0; | |
237 | } | |
238 | ||
239 | /* If using GCC, we can safely declare strlen this way. | |
240 | If not using GCC, it is ok not to declare it. */ | |
241 | #ifdef __GNUC__ | |
242 | /* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h. | |
243 | That was relevant to code that was here before. */ | |
244 | # if (!defined __STDC__ || !__STDC__) && !defined strlen | |
245 | /* gcc with -traditional declares the built-in strlen to return int, | |
246 | and has done so at least since version 2.4.5. -- rms. */ | |
247 | extern int strlen (const char *); | |
248 | # endif /* not __STDC__ */ | |
249 | #endif /* __GNUC__ */ | |
250 | ||
251 | #endif /* not __GNU_LIBRARY__ */ | |
252 | \f | |
253 | /* Handle permutation of arguments. */ | |
254 | ||
255 | /* Describe the part of ARGV that contains non-options that have | |
256 | been skipped. `first_nonopt' is the index in ARGV of the first of them; | |
257 | `last_nonopt' is the index after the last of them. */ | |
258 | ||
259 | static int first_nonopt; | |
260 | static int last_nonopt; | |
261 | ||
262 | #ifdef _LIBC | |
263 | /* Bash 2.0 gives us an environment variable containing flags | |
264 | indicating ARGV elements that should not be considered arguments. */ | |
265 | ||
266 | /* Defined in getopt_init.c */ | |
267 | extern char *__getopt_nonoption_flags; | |
268 | ||
269 | static int nonoption_flags_max_len; | |
270 | static int nonoption_flags_len; | |
271 | ||
272 | static int original_argc; | |
273 | static char *const *original_argv; | |
274 | ||
275 | /* Make sure the environment variable bash 2.0 puts in the environment | |
276 | is valid for the getopt call we must make sure that the ARGV passed | |
277 | to getopt is that one passed to the process. */ | |
278 | static void | |
279 | __attribute__ ((unused)) | |
280 | store_args_and_env (int argc, char *const *argv) | |
281 | { | |
282 | /* XXX This is no good solution. We should rather copy the args so | |
283 | that we can compare them later. But we must not use malloc(3). */ | |
284 | original_argc = argc; | |
285 | original_argv = argv; | |
286 | } | |
287 | # ifdef text_set_element | |
288 | text_set_element (__libc_subinit, store_args_and_env); | |
289 | # endif /* text_set_element */ | |
290 | ||
291 | # define SWAP_FLAGS(ch1, ch2) \ | |
292 | if (nonoption_flags_len > 0) \ | |
293 | { \ | |
294 | char __tmp = __getopt_nonoption_flags[ch1]; \ | |
295 | __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \ | |
296 | __getopt_nonoption_flags[ch2] = __tmp; \ | |
297 | } | |
298 | #else /* !_LIBC */ | |
299 | # define SWAP_FLAGS(ch1, ch2) | |
300 | #endif /* _LIBC */ | |
301 | ||
302 | /* Exchange two adjacent subsequences of ARGV. | |
303 | One subsequence is elements [first_nonopt,last_nonopt) | |
304 | which contains all the non-options that have been skipped so far. | |
305 | The other is elements [last_nonopt,optind), which contains all | |
306 | the options processed since those non-options were skipped. | |
307 | ||
308 | `first_nonopt' and `last_nonopt' are relocated so that they describe | |
309 | the new indices of the non-options in ARGV after they are moved. */ | |
310 | ||
311 | #if defined __STDC__ && __STDC__ | |
312 | static void exchange (char **); | |
313 | #endif | |
314 | ||
315 | static void | |
49b1fae4 | 316 | exchange (char **argv) |
252b5132 RH |
317 | { |
318 | int bottom = first_nonopt; | |
319 | int middle = last_nonopt; | |
320 | int top = optind; | |
321 | char *tem; | |
322 | ||
323 | /* Exchange the shorter segment with the far end of the longer segment. | |
324 | That puts the shorter segment into the right place. | |
325 | It leaves the longer segment in the right place overall, | |
326 | but it consists of two parts that need to be swapped next. */ | |
327 | ||
328 | #ifdef _LIBC | |
329 | /* First make sure the handling of the `__getopt_nonoption_flags' | |
330 | string can work normally. Our top argument must be in the range | |
331 | of the string. */ | |
332 | if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len) | |
333 | { | |
334 | /* We must extend the array. The user plays games with us and | |
335 | presents new arguments. */ | |
abf6a75b | 336 | char *new_str = (char *) malloc (top + 1); |
252b5132 RH |
337 | if (new_str == NULL) |
338 | nonoption_flags_len = nonoption_flags_max_len = 0; | |
339 | else | |
340 | { | |
258a4893 DD |
341 | memset (mempcpy (new_str, __getopt_nonoption_flags, |
342 | nonoption_flags_max_len), | |
252b5132 RH |
343 | '\0', top + 1 - nonoption_flags_max_len); |
344 | nonoption_flags_max_len = top + 1; | |
345 | __getopt_nonoption_flags = new_str; | |
346 | } | |
347 | } | |
348 | #endif | |
349 | ||
350 | while (top > middle && middle > bottom) | |
351 | { | |
352 | if (top - middle > middle - bottom) | |
353 | { | |
354 | /* Bottom segment is the short one. */ | |
355 | int len = middle - bottom; | |
356 | register int i; | |
357 | ||
358 | /* Swap it with the top part of the top segment. */ | |
359 | for (i = 0; i < len; i++) | |
360 | { | |
361 | tem = argv[bottom + i]; | |
362 | argv[bottom + i] = argv[top - (middle - bottom) + i]; | |
363 | argv[top - (middle - bottom) + i] = tem; | |
364 | SWAP_FLAGS (bottom + i, top - (middle - bottom) + i); | |
365 | } | |
366 | /* Exclude the moved bottom segment from further swapping. */ | |
367 | top -= len; | |
368 | } | |
369 | else | |
370 | { | |
371 | /* Top segment is the short one. */ | |
372 | int len = top - middle; | |
373 | register int i; | |
374 | ||
375 | /* Swap it with the bottom part of the bottom segment. */ | |
376 | for (i = 0; i < len; i++) | |
377 | { | |
378 | tem = argv[bottom + i]; | |
379 | argv[bottom + i] = argv[middle + i]; | |
380 | argv[middle + i] = tem; | |
381 | SWAP_FLAGS (bottom + i, middle + i); | |
382 | } | |
383 | /* Exclude the moved top segment from further swapping. */ | |
384 | bottom += len; | |
385 | } | |
386 | } | |
387 | ||
388 | /* Update records for the slots the non-options now occupy. */ | |
389 | ||
390 | first_nonopt += (optind - last_nonopt); | |
391 | last_nonopt = optind; | |
392 | } | |
393 | ||
394 | /* Initialize the internal data when the first call is made. */ | |
395 | ||
396 | #if defined __STDC__ && __STDC__ | |
397 | static const char *_getopt_initialize (int, char *const *, const char *); | |
398 | #endif | |
399 | static const char * | |
49b1fae4 | 400 | _getopt_initialize (int argc, char *const *argv, const char *optstring) |
252b5132 RH |
401 | { |
402 | /* Start processing options with ARGV-element 1 (since ARGV-element 0 | |
403 | is the program name); the sequence of previously skipped | |
404 | non-option ARGV-elements is empty. */ | |
405 | ||
406 | first_nonopt = last_nonopt = optind; | |
407 | ||
408 | nextchar = NULL; | |
409 | ||
410 | posixly_correct = getenv ("POSIXLY_CORRECT"); | |
411 | ||
412 | /* Determine how to handle the ordering of options and nonoptions. */ | |
413 | ||
414 | if (optstring[0] == '-') | |
415 | { | |
416 | ordering = RETURN_IN_ORDER; | |
417 | ++optstring; | |
418 | } | |
419 | else if (optstring[0] == '+') | |
420 | { | |
421 | ordering = REQUIRE_ORDER; | |
422 | ++optstring; | |
423 | } | |
424 | else if (posixly_correct != NULL) | |
425 | ordering = REQUIRE_ORDER; | |
426 | else | |
427 | ordering = PERMUTE; | |
428 | ||
429 | #ifdef _LIBC | |
430 | if (posixly_correct == NULL | |
431 | && argc == original_argc && argv == original_argv) | |
432 | { | |
433 | if (nonoption_flags_max_len == 0) | |
434 | { | |
435 | if (__getopt_nonoption_flags == NULL | |
436 | || __getopt_nonoption_flags[0] == '\0') | |
437 | nonoption_flags_max_len = -1; | |
438 | else | |
439 | { | |
440 | const char *orig_str = __getopt_nonoption_flags; | |
441 | int len = nonoption_flags_max_len = strlen (orig_str); | |
442 | if (nonoption_flags_max_len < argc) | |
443 | nonoption_flags_max_len = argc; | |
444 | __getopt_nonoption_flags = | |
445 | (char *) malloc (nonoption_flags_max_len); | |
446 | if (__getopt_nonoption_flags == NULL) | |
447 | nonoption_flags_max_len = -1; | |
448 | else | |
258a4893 | 449 | memset (mempcpy (__getopt_nonoption_flags, orig_str, len), |
252b5132 RH |
450 | '\0', nonoption_flags_max_len - len); |
451 | } | |
452 | } | |
453 | nonoption_flags_len = nonoption_flags_max_len; | |
454 | } | |
455 | else | |
456 | nonoption_flags_len = 0; | |
457 | #endif | |
458 | ||
459 | return optstring; | |
460 | } | |
461 | \f | |
462 | /* Scan elements of ARGV (whose length is ARGC) for option characters | |
463 | given in OPTSTRING. | |
464 | ||
465 | If an element of ARGV starts with '-', and is not exactly "-" or "--", | |
466 | then it is an option element. The characters of this element | |
467 | (aside from the initial '-') are option characters. If `getopt' | |
468 | is called repeatedly, it returns successively each of the option characters | |
469 | from each of the option elements. | |
470 | ||
471 | If `getopt' finds another option character, it returns that character, | |
472 | updating `optind' and `nextchar' so that the next call to `getopt' can | |
473 | resume the scan with the following option character or ARGV-element. | |
474 | ||
475 | If there are no more option characters, `getopt' returns -1. | |
476 | Then `optind' is the index in ARGV of the first ARGV-element | |
477 | that is not an option. (The ARGV-elements have been permuted | |
478 | so that those that are not options now come last.) | |
479 | ||
480 | OPTSTRING is a string containing the legitimate option characters. | |
481 | If an option character is seen that is not listed in OPTSTRING, | |
482 | return '?' after printing an error message. If you set `opterr' to | |
483 | zero, the error message is suppressed but we still return '?'. | |
484 | ||
485 | If a char in OPTSTRING is followed by a colon, that means it wants an arg, | |
486 | so the following text in the same ARGV-element, or the text of the following | |
487 | ARGV-element, is returned in `optarg'. Two colons mean an option that | |
488 | wants an optional arg; if there is text in the current ARGV-element, | |
489 | it is returned in `optarg', otherwise `optarg' is set to zero. | |
490 | ||
491 | If OPTSTRING starts with `-' or `+', it requests different methods of | |
492 | handling the non-option ARGV-elements. | |
493 | See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above. | |
494 | ||
495 | Long-named options begin with `--' instead of `-'. | |
496 | Their names may be abbreviated as long as the abbreviation is unique | |
497 | or is an exact match for some defined option. If they have an | |
498 | argument, it follows the option name in the same ARGV-element, separated | |
499 | from the option name by a `=', or else the in next ARGV-element. | |
500 | When `getopt' finds a long-named option, it returns 0 if that option's | |
501 | `flag' field is nonzero, the value of the option's `val' field | |
502 | if the `flag' field is zero. | |
503 | ||
504 | The elements of ARGV aren't really const, because we permute them. | |
505 | But we pretend they're const in the prototype to be compatible | |
506 | with other systems. | |
507 | ||
508 | LONGOPTS is a vector of `struct option' terminated by an | |
509 | element containing a name which is zero. | |
510 | ||
511 | LONGIND returns the index in LONGOPT of the long-named option found. | |
512 | It is only valid when a long-named option has been found by the most | |
513 | recent call. | |
514 | ||
515 | If LONG_ONLY is nonzero, '-' as well as '--' can introduce | |
516 | long-named options. */ | |
517 | ||
518 | int | |
49b1fae4 DD |
519 | _getopt_internal (int argc, char *const *argv, const char *optstring, |
520 | const struct option *longopts, | |
521 | int *longind, int long_only) | |
252b5132 RH |
522 | { |
523 | optarg = NULL; | |
524 | ||
525 | if (optind == 0 || !__getopt_initialized) | |
526 | { | |
527 | if (optind == 0) | |
528 | optind = 1; /* Don't scan ARGV[0], the program name. */ | |
529 | optstring = _getopt_initialize (argc, argv, optstring); | |
530 | __getopt_initialized = 1; | |
531 | } | |
532 | ||
533 | /* Test whether ARGV[optind] points to a non-option argument. | |
534 | Either it does not have option syntax, or there is an environment flag | |
535 | from the shell indicating it is not an option. The later information | |
536 | is only used when the used in the GNU libc. */ | |
537 | #ifdef _LIBC | |
538 | # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \ | |
539 | || (optind < nonoption_flags_len \ | |
540 | && __getopt_nonoption_flags[optind] == '1')) | |
541 | #else | |
542 | # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0') | |
543 | #endif | |
544 | ||
545 | if (nextchar == NULL || *nextchar == '\0') | |
546 | { | |
547 | /* Advance to the next ARGV-element. */ | |
548 | ||
549 | /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been | |
550 | moved back by the user (who may also have changed the arguments). */ | |
551 | if (last_nonopt > optind) | |
552 | last_nonopt = optind; | |
553 | if (first_nonopt > optind) | |
554 | first_nonopt = optind; | |
555 | ||
556 | if (ordering == PERMUTE) | |
557 | { | |
558 | /* If we have just processed some options following some non-options, | |
559 | exchange them so that the options come first. */ | |
560 | ||
561 | if (first_nonopt != last_nonopt && last_nonopt != optind) | |
562 | exchange ((char **) argv); | |
563 | else if (last_nonopt != optind) | |
564 | first_nonopt = optind; | |
565 | ||
566 | /* Skip any additional non-options | |
567 | and extend the range of non-options previously skipped. */ | |
568 | ||
569 | while (optind < argc && NONOPTION_P) | |
570 | optind++; | |
571 | last_nonopt = optind; | |
572 | } | |
573 | ||
574 | /* The special ARGV-element `--' means premature end of options. | |
575 | Skip it like a null option, | |
576 | then exchange with previous non-options as if it were an option, | |
577 | then skip everything else like a non-option. */ | |
578 | ||
579 | if (optind != argc && !strcmp (argv[optind], "--")) | |
580 | { | |
581 | optind++; | |
582 | ||
583 | if (first_nonopt != last_nonopt && last_nonopt != optind) | |
584 | exchange ((char **) argv); | |
585 | else if (first_nonopt == last_nonopt) | |
586 | first_nonopt = optind; | |
587 | last_nonopt = argc; | |
588 | ||
589 | optind = argc; | |
590 | } | |
591 | ||
592 | /* If we have done all the ARGV-elements, stop the scan | |
593 | and back over any non-options that we skipped and permuted. */ | |
594 | ||
595 | if (optind == argc) | |
596 | { | |
597 | /* Set the next-arg-index to point at the non-options | |
598 | that we previously skipped, so the caller will digest them. */ | |
599 | if (first_nonopt != last_nonopt) | |
600 | optind = first_nonopt; | |
601 | return -1; | |
602 | } | |
603 | ||
604 | /* If we have come to a non-option and did not permute it, | |
605 | either stop the scan or describe it to the caller and pass it by. */ | |
606 | ||
607 | if (NONOPTION_P) | |
608 | { | |
609 | if (ordering == REQUIRE_ORDER) | |
610 | return -1; | |
611 | optarg = argv[optind++]; | |
612 | return 1; | |
613 | } | |
614 | ||
615 | /* We have found another option-ARGV-element. | |
616 | Skip the initial punctuation. */ | |
617 | ||
618 | nextchar = (argv[optind] + 1 | |
619 | + (longopts != NULL && argv[optind][1] == '-')); | |
620 | } | |
621 | ||
622 | /* Decode the current option-ARGV-element. */ | |
623 | ||
624 | /* Check whether the ARGV-element is a long option. | |
625 | ||
626 | If long_only and the ARGV-element has the form "-f", where f is | |
627 | a valid short option, don't consider it an abbreviated form of | |
628 | a long option that starts with f. Otherwise there would be no | |
629 | way to give the -f short option. | |
630 | ||
631 | On the other hand, if there's a long option "fubar" and | |
632 | the ARGV-element is "-fu", do consider that an abbreviation of | |
633 | the long option, just like "--fu", and not "-f" with arg "u". | |
634 | ||
635 | This distinction seems to be the most useful approach. */ | |
636 | ||
637 | if (longopts != NULL | |
638 | && (argv[optind][1] == '-' | |
639 | || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1]))))) | |
640 | { | |
641 | char *nameend; | |
642 | const struct option *p; | |
643 | const struct option *pfound = NULL; | |
644 | int exact = 0; | |
645 | int ambig = 0; | |
646 | int indfound = -1; | |
647 | int option_index; | |
648 | ||
649 | for (nameend = nextchar; *nameend && *nameend != '='; nameend++) | |
650 | /* Do nothing. */ ; | |
651 | ||
652 | /* Test all long options for either exact match | |
653 | or abbreviated matches. */ | |
654 | for (p = longopts, option_index = 0; p->name; p++, option_index++) | |
655 | if (!strncmp (p->name, nextchar, nameend - nextchar)) | |
656 | { | |
657 | if ((unsigned int) (nameend - nextchar) | |
658 | == (unsigned int) strlen (p->name)) | |
659 | { | |
660 | /* Exact match found. */ | |
661 | pfound = p; | |
662 | indfound = option_index; | |
663 | exact = 1; | |
664 | break; | |
665 | } | |
666 | else if (pfound == NULL) | |
667 | { | |
668 | /* First nonexact match found. */ | |
669 | pfound = p; | |
670 | indfound = option_index; | |
671 | } | |
672 | else | |
673 | /* Second or later nonexact match found. */ | |
674 | ambig = 1; | |
675 | } | |
676 | ||
677 | if (ambig && !exact) | |
678 | { | |
679 | if (opterr) | |
680 | fprintf (stderr, _("%s: option `%s' is ambiguous\n"), | |
681 | argv[0], argv[optind]); | |
682 | nextchar += strlen (nextchar); | |
683 | optind++; | |
684 | optopt = 0; | |
685 | return '?'; | |
686 | } | |
687 | ||
688 | if (pfound != NULL) | |
689 | { | |
690 | option_index = indfound; | |
691 | optind++; | |
692 | if (*nameend) | |
693 | { | |
694 | /* Don't test has_arg with >, because some C compilers don't | |
695 | allow it to be used on enums. */ | |
696 | if (pfound->has_arg) | |
697 | optarg = nameend + 1; | |
698 | else | |
699 | { | |
700 | if (opterr) | |
701 | { | |
702 | if (argv[optind - 1][1] == '-') | |
703 | /* --option */ | |
704 | fprintf (stderr, | |
705 | _("%s: option `--%s' doesn't allow an argument\n"), | |
706 | argv[0], pfound->name); | |
707 | else | |
708 | /* +option or -option */ | |
709 | fprintf (stderr, | |
710 | _("%s: option `%c%s' doesn't allow an argument\n"), | |
711 | argv[0], argv[optind - 1][0], pfound->name); | |
712 | ||
713 | nextchar += strlen (nextchar); | |
714 | ||
715 | optopt = pfound->val; | |
716 | return '?'; | |
717 | } | |
718 | } | |
719 | } | |
720 | else if (pfound->has_arg == 1) | |
721 | { | |
722 | if (optind < argc) | |
723 | optarg = argv[optind++]; | |
724 | else | |
725 | { | |
726 | if (opterr) | |
727 | fprintf (stderr, | |
728 | _("%s: option `%s' requires an argument\n"), | |
729 | argv[0], argv[optind - 1]); | |
730 | nextchar += strlen (nextchar); | |
731 | optopt = pfound->val; | |
732 | return optstring[0] == ':' ? ':' : '?'; | |
733 | } | |
734 | } | |
735 | nextchar += strlen (nextchar); | |
736 | if (longind != NULL) | |
737 | *longind = option_index; | |
738 | if (pfound->flag) | |
739 | { | |
740 | *(pfound->flag) = pfound->val; | |
741 | return 0; | |
742 | } | |
743 | return pfound->val; | |
744 | } | |
745 | ||
746 | /* Can't find it as a long option. If this is not getopt_long_only, | |
747 | or the option starts with '--' or is not a valid short | |
748 | option, then it's an error. | |
749 | Otherwise interpret it as a short option. */ | |
750 | if (!long_only || argv[optind][1] == '-' | |
751 | || my_index (optstring, *nextchar) == NULL) | |
752 | { | |
753 | if (opterr) | |
754 | { | |
755 | if (argv[optind][1] == '-') | |
756 | /* --option */ | |
757 | fprintf (stderr, _("%s: unrecognized option `--%s'\n"), | |
758 | argv[0], nextchar); | |
759 | else | |
760 | /* +option or -option */ | |
761 | fprintf (stderr, _("%s: unrecognized option `%c%s'\n"), | |
762 | argv[0], argv[optind][0], nextchar); | |
763 | } | |
764 | nextchar = (char *) ""; | |
765 | optind++; | |
766 | optopt = 0; | |
767 | return '?'; | |
768 | } | |
769 | } | |
770 | ||
771 | /* Look at and handle the next short option-character. */ | |
772 | ||
773 | { | |
774 | char c = *nextchar++; | |
775 | char *temp = my_index (optstring, c); | |
776 | ||
777 | /* Increment `optind' when we start to process its last character. */ | |
778 | if (*nextchar == '\0') | |
779 | ++optind; | |
780 | ||
781 | if (temp == NULL || c == ':') | |
782 | { | |
783 | if (opterr) | |
784 | { | |
785 | if (posixly_correct) | |
786 | /* 1003.2 specifies the format of this message. */ | |
787 | fprintf (stderr, _("%s: illegal option -- %c\n"), | |
788 | argv[0], c); | |
789 | else | |
790 | fprintf (stderr, _("%s: invalid option -- %c\n"), | |
791 | argv[0], c); | |
792 | } | |
793 | optopt = c; | |
794 | return '?'; | |
795 | } | |
796 | /* Convenience. Treat POSIX -W foo same as long option --foo */ | |
797 | if (temp[0] == 'W' && temp[1] == ';') | |
798 | { | |
799 | char *nameend; | |
800 | const struct option *p; | |
801 | const struct option *pfound = NULL; | |
802 | int exact = 0; | |
803 | int ambig = 0; | |
804 | int indfound = 0; | |
805 | int option_index; | |
806 | ||
807 | /* This is an option that requires an argument. */ | |
808 | if (*nextchar != '\0') | |
809 | { | |
810 | optarg = nextchar; | |
811 | /* If we end this ARGV-element by taking the rest as an arg, | |
812 | we must advance to the next element now. */ | |
813 | optind++; | |
814 | } | |
815 | else if (optind == argc) | |
816 | { | |
817 | if (opterr) | |
818 | { | |
819 | /* 1003.2 specifies the format of this message. */ | |
820 | fprintf (stderr, _("%s: option requires an argument -- %c\n"), | |
821 | argv[0], c); | |
822 | } | |
823 | optopt = c; | |
824 | if (optstring[0] == ':') | |
825 | c = ':'; | |
826 | else | |
827 | c = '?'; | |
828 | return c; | |
829 | } | |
830 | else | |
831 | /* We already incremented `optind' once; | |
832 | increment it again when taking next ARGV-elt as argument. */ | |
833 | optarg = argv[optind++]; | |
834 | ||
835 | /* optarg is now the argument, see if it's in the | |
836 | table of longopts. */ | |
837 | ||
838 | for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++) | |
839 | /* Do nothing. */ ; | |
840 | ||
841 | /* Test all long options for either exact match | |
842 | or abbreviated matches. */ | |
843 | for (p = longopts, option_index = 0; p->name; p++, option_index++) | |
844 | if (!strncmp (p->name, nextchar, nameend - nextchar)) | |
845 | { | |
846 | if ((unsigned int) (nameend - nextchar) == strlen (p->name)) | |
847 | { | |
848 | /* Exact match found. */ | |
849 | pfound = p; | |
850 | indfound = option_index; | |
851 | exact = 1; | |
852 | break; | |
853 | } | |
854 | else if (pfound == NULL) | |
855 | { | |
856 | /* First nonexact match found. */ | |
857 | pfound = p; | |
858 | indfound = option_index; | |
859 | } | |
860 | else | |
861 | /* Second or later nonexact match found. */ | |
862 | ambig = 1; | |
863 | } | |
864 | if (ambig && !exact) | |
865 | { | |
866 | if (opterr) | |
867 | fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"), | |
868 | argv[0], argv[optind]); | |
869 | nextchar += strlen (nextchar); | |
870 | optind++; | |
871 | return '?'; | |
872 | } | |
873 | if (pfound != NULL) | |
874 | { | |
875 | option_index = indfound; | |
876 | if (*nameend) | |
877 | { | |
878 | /* Don't test has_arg with >, because some C compilers don't | |
879 | allow it to be used on enums. */ | |
880 | if (pfound->has_arg) | |
881 | optarg = nameend + 1; | |
882 | else | |
883 | { | |
884 | if (opterr) | |
885 | fprintf (stderr, _("\ | |
886 | %s: option `-W %s' doesn't allow an argument\n"), | |
887 | argv[0], pfound->name); | |
888 | ||
889 | nextchar += strlen (nextchar); | |
890 | return '?'; | |
891 | } | |
892 | } | |
893 | else if (pfound->has_arg == 1) | |
894 | { | |
895 | if (optind < argc) | |
896 | optarg = argv[optind++]; | |
897 | else | |
898 | { | |
899 | if (opterr) | |
900 | fprintf (stderr, | |
901 | _("%s: option `%s' requires an argument\n"), | |
902 | argv[0], argv[optind - 1]); | |
903 | nextchar += strlen (nextchar); | |
904 | return optstring[0] == ':' ? ':' : '?'; | |
905 | } | |
906 | } | |
907 | nextchar += strlen (nextchar); | |
908 | if (longind != NULL) | |
909 | *longind = option_index; | |
910 | if (pfound->flag) | |
911 | { | |
912 | *(pfound->flag) = pfound->val; | |
913 | return 0; | |
914 | } | |
915 | return pfound->val; | |
916 | } | |
917 | nextchar = NULL; | |
918 | return 'W'; /* Let the application handle it. */ | |
919 | } | |
920 | if (temp[1] == ':') | |
921 | { | |
922 | if (temp[2] == ':') | |
923 | { | |
924 | /* This is an option that accepts an argument optionally. */ | |
925 | if (*nextchar != '\0') | |
926 | { | |
927 | optarg = nextchar; | |
928 | optind++; | |
929 | } | |
930 | else | |
931 | optarg = NULL; | |
932 | nextchar = NULL; | |
933 | } | |
934 | else | |
935 | { | |
936 | /* This is an option that requires an argument. */ | |
937 | if (*nextchar != '\0') | |
938 | { | |
939 | optarg = nextchar; | |
940 | /* If we end this ARGV-element by taking the rest as an arg, | |
941 | we must advance to the next element now. */ | |
942 | optind++; | |
943 | } | |
944 | else if (optind == argc) | |
945 | { | |
946 | if (opterr) | |
947 | { | |
948 | /* 1003.2 specifies the format of this message. */ | |
949 | fprintf (stderr, | |
950 | _("%s: option requires an argument -- %c\n"), | |
951 | argv[0], c); | |
952 | } | |
953 | optopt = c; | |
954 | if (optstring[0] == ':') | |
955 | c = ':'; | |
956 | else | |
957 | c = '?'; | |
958 | } | |
959 | else | |
960 | /* We already incremented `optind' once; | |
961 | increment it again when taking next ARGV-elt as argument. */ | |
962 | optarg = argv[optind++]; | |
963 | nextchar = NULL; | |
964 | } | |
965 | } | |
966 | return c; | |
967 | } | |
968 | } | |
969 | ||
970 | int | |
49b1fae4 | 971 | getopt (int argc, char *const *argv, const char *optstring) |
252b5132 RH |
972 | { |
973 | return _getopt_internal (argc, argv, optstring, | |
974 | (const struct option *) 0, | |
975 | (int *) 0, | |
976 | 0); | |
977 | } | |
978 | ||
979 | #endif /* Not ELIDE_CODE. */ | |
980 | \f | |
981 | #ifdef TEST | |
982 | ||
983 | /* Compile with -DTEST to make an executable for use in testing | |
984 | the above definition of `getopt'. */ | |
985 | ||
986 | int | |
49b1fae4 | 987 | main (int argc, char **argv) |
252b5132 RH |
988 | { |
989 | int c; | |
990 | int digit_optind = 0; | |
991 | ||
992 | while (1) | |
993 | { | |
994 | int this_option_optind = optind ? optind : 1; | |
995 | ||
996 | c = getopt (argc, argv, "abc:d:0123456789"); | |
997 | if (c == -1) | |
998 | break; | |
999 | ||
1000 | switch (c) | |
1001 | { | |
1002 | case '0': | |
1003 | case '1': | |
1004 | case '2': | |
1005 | case '3': | |
1006 | case '4': | |
1007 | case '5': | |
1008 | case '6': | |
1009 | case '7': | |
1010 | case '8': | |
1011 | case '9': | |
1012 | if (digit_optind != 0 && digit_optind != this_option_optind) | |
1013 | printf ("digits occur in two different argv-elements.\n"); | |
1014 | digit_optind = this_option_optind; | |
1015 | printf ("option %c\n", c); | |
1016 | break; | |
1017 | ||
1018 | case 'a': | |
1019 | printf ("option a\n"); | |
1020 | break; | |
1021 | ||
1022 | case 'b': | |
1023 | printf ("option b\n"); | |
1024 | break; | |
1025 | ||
1026 | case 'c': | |
1027 | printf ("option c with value `%s'\n", optarg); | |
1028 | break; | |
1029 | ||
1030 | case '?': | |
1031 | break; | |
1032 | ||
1033 | default: | |
1034 | printf ("?? getopt returned character code 0%o ??\n", c); | |
1035 | } | |
1036 | } | |
1037 | ||
1038 | if (optind < argc) | |
1039 | { | |
1040 | printf ("non-option ARGV-elements: "); | |
1041 | while (optind < argc) | |
1042 | printf ("%s ", argv[optind++]); | |
1043 | printf ("\n"); | |
1044 | } | |
1045 | ||
1046 | exit (0); | |
1047 | } | |
1048 | ||
1049 | #endif /* TEST */ |