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1479465f GJ |
1 | /* Getopt for GNU. |
2 | NOTE: getopt is now part of the C library, so if you don't know what | |
3 | "Keep this file name-space clean" means, talk to roland@gnu.ai.mit.edu | |
4 | before changing it! | |
5 | ||
6 | Copyright (C) 1987, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97 | |
7 | Free Software Foundation, Inc. | |
8 | ||
9 | the C library, however. The master source lives in /gd/gnu/lib. | |
10 | ||
11 | NOTE: The canonical source of this file is maintained with the GNU C Library. | |
12 | Bugs can be reported to bug-glibc@prep.ai.mit.edu. | |
13 | ||
14 | This program is free software; you can redistribute it and/or modify it | |
15 | under the terms of the GNU General Public License as published by the | |
16 | Free Software Foundation; either version 2, or (at your option) any | |
17 | later version. | |
18 | ||
19 | This program is distributed in the hope that it will be useful, | |
20 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | GNU General Public License for more details. | |
23 | ||
24 | You should have received a copy of the GNU General Public License | |
25 | along with this program; if not, write to the Free Software | |
26 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, | |
27 | USA. */ | |
28 | \f | |
29 | /* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>. | |
30 | Ditto for AIX 3.2 and <stdlib.h>. */ | |
31 | #ifndef _NO_PROTO | |
32 | #define _NO_PROTO | |
33 | #endif | |
34 | ||
35 | #ifdef HAVE_CONFIG_H | |
36 | #include <config.h> | |
37 | #endif | |
38 | ||
39 | #if !defined (__STDC__) || !__STDC__ | |
40 | /* This is a separate conditional since some stdc systems | |
41 | reject `defined (const)'. */ | |
42 | #ifndef const | |
43 | #define const | |
44 | #endif | |
45 | #endif | |
46 | ||
47 | #include <stdio.h> | |
48 | ||
49 | /* Comment out all this code if we are using the GNU C Library, and are not | |
50 | actually compiling the library itself. This code is part of the GNU C | |
51 | Library, but also included in many other GNU distributions. Compiling | |
52 | and linking in this code is a waste when using the GNU C library | |
53 | (especially if it is a shared library). Rather than having every GNU | |
54 | program understand `configure --with-gnu-libc' and omit the object files, | |
55 | it is simpler to just do this in the source for each such file. */ | |
56 | ||
57 | #define GETOPT_INTERFACE_VERSION 2 | |
58 | #if !defined (_LIBC) && defined (__GLIBC__) && __GLIBC__ >= 2 | |
59 | #include <gnu-versions.h> | |
60 | #if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION | |
61 | #define ELIDE_CODE | |
62 | #endif | |
63 | #endif | |
64 | ||
65 | #ifndef ELIDE_CODE | |
66 | ||
67 | ||
68 | /* This needs to come after some library #include | |
69 | to get __GNU_LIBRARY__ defined. */ | |
70 | #ifdef __GNU_LIBRARY__ | |
71 | /* Don't include stdlib.h for non-GNU C libraries because some of them | |
72 | contain conflicting prototypes for getopt. */ | |
73 | #include <stdlib.h> | |
74 | #include <unistd.h> | |
75 | #endif /* GNU C library. */ | |
76 | ||
77 | #ifdef VMS | |
78 | #include <unixlib.h> | |
79 | #if HAVE_STRING_H - 0 | |
80 | #include <string.h> | |
81 | #endif | |
82 | #endif | |
83 | ||
84 | #if defined (WIN32) && !defined (__CYGWIN32__) | |
85 | /* It's not Unix, really. See? Capital letters. */ | |
86 | #include <windows.h> | |
87 | #define getpid() GetCurrentProcessId() | |
88 | #endif | |
89 | ||
90 | /* XXX: Disable intl support, because we do not carry the translations anyway | |
91 | * and this pulls indirectly libintl, wich we do not want to impose. */ | |
92 | #ifndef _ | |
93 | #define _(msgid) (msgid) | |
94 | #endif | |
95 | ||
96 | /* This version of `getopt' appears to the caller like standard Unix `getopt' | |
97 | but it behaves differently for the user, since it allows the user | |
98 | to intersperse the options with the other arguments. | |
99 | ||
100 | As `getopt' works, it permutes the elements of ARGV so that, | |
101 | when it is done, all the options precede everything else. Thus | |
102 | all application programs are extended to handle flexible argument order. | |
103 | ||
104 | Setting the environment variable POSIXLY_CORRECT disables permutation. | |
105 | Then the behavior is completely standard. | |
106 | ||
107 | GNU application programs can use a third alternative mode in which | |
108 | they can distinguish the relative order of options and other arguments. */ | |
109 | ||
110 | #include "getopt.h" | |
111 | ||
112 | /* For communication from `getopt' to the caller. | |
113 | When `getopt' finds an option that takes an argument, | |
114 | the argument value is returned here. | |
115 | Also, when `ordering' is RETURN_IN_ORDER, | |
116 | each non-option ARGV-element is returned here. */ | |
117 | ||
118 | char *optarg = NULL; | |
119 | ||
120 | /* Index in ARGV of the next element to be scanned. | |
121 | This is used for communication to and from the caller | |
122 | and for communication between successive calls to `getopt'. | |
123 | ||
124 | On entry to `getopt', zero means this is the first call; initialize. | |
125 | ||
126 | When `getopt' returns -1, this is the index of the first of the | |
127 | non-option elements that the caller should itself scan. | |
128 | ||
129 | Otherwise, `optind' communicates from one call to the next | |
130 | how much of ARGV has been scanned so far. */ | |
131 | ||
132 | /* 1003.2 says this must be 1 before any call. */ | |
133 | int optind = 1; | |
134 | ||
135 | /* Formerly, initialization of getopt depended on optind==0, which | |
136 | causes problems with re-calling getopt as programs generally don't | |
137 | know that. */ | |
138 | ||
139 | int __getopt_initialized = 0; | |
140 | ||
141 | /* The next char to be scanned in the option-element | |
142 | in which the last option character we returned was found. | |
143 | This allows us to pick up the scan where we left off. | |
144 | ||
145 | If this is zero, or a null string, it means resume the scan | |
146 | by advancing to the next ARGV-element. */ | |
147 | ||
148 | static char *nextchar; | |
149 | ||
150 | /* Callers store zero here to inhibit the error message | |
151 | for unrecognized options. */ | |
152 | ||
153 | int opterr = 1; | |
154 | ||
155 | /* Set to an option character which was unrecognized. | |
156 | This must be initialized on some systems to avoid linking in the | |
157 | system's own getopt implementation. */ | |
158 | ||
159 | int optopt = '?'; | |
160 | ||
161 | /* Describe how to deal with options that follow non-option ARGV-elements. | |
162 | ||
163 | If the caller did not specify anything, | |
164 | the default is REQUIRE_ORDER if the environment variable | |
165 | POSIXLY_CORRECT is defined, PERMUTE otherwise. | |
166 | ||
167 | REQUIRE_ORDER means don't recognize them as options; | |
168 | stop option processing when the first non-option is seen. | |
169 | This is what Unix does. | |
170 | This mode of operation is selected by either setting the environment | |
171 | variable POSIXLY_CORRECT, or using `+' as the first character | |
172 | of the list of option characters. | |
173 | ||
174 | PERMUTE is the default. We permute the contents of ARGV as we scan, | |
175 | so that eventually all the non-options are at the end. This allows options | |
176 | to be given in any order, even with programs that were not written to | |
177 | expect this. | |
178 | ||
179 | RETURN_IN_ORDER is an option available to programs that were written | |
180 | to expect options and other ARGV-elements in any order and that care about | |
181 | the ordering of the two. We describe each non-option ARGV-element | |
182 | as if it were the argument of an option with character code 1. | |
183 | Using `-' as the first character of the list of option characters | |
184 | selects this mode of operation. | |
185 | ||
186 | The special argument `--' forces an end of option-scanning regardless | |
187 | of the value of `ordering'. In the case of RETURN_IN_ORDER, only | |
188 | `--' can cause `getopt' to return -1 with `optind' != ARGC. */ | |
189 | ||
190 | static enum | |
191 | { | |
192 | REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER | |
193 | } ordering; | |
194 | ||
195 | /* Value of POSIXLY_CORRECT environment variable. */ | |
196 | static char *posixly_correct; | |
197 | \f | |
198 | #ifdef __GNU_LIBRARY__ | |
199 | /* We want to avoid inclusion of string.h with non-GNU libraries | |
200 | because there are many ways it can cause trouble. | |
201 | On some systems, it contains special magic macros that don't work | |
202 | in GCC. */ | |
203 | #include <string.h> | |
204 | #define my_index strchr | |
205 | #else | |
206 | ||
207 | /* Avoid depending on library functions or files | |
208 | whose names are inconsistent. */ | |
209 | ||
210 | char *getenv (); | |
211 | ||
212 | static char * | |
213 | my_index (str, chr) | |
214 | const char *str; | |
215 | int chr; | |
216 | { | |
217 | while (*str) | |
218 | { | |
219 | if (*str == chr) | |
220 | return (char *) str; | |
221 | str++; | |
222 | } | |
223 | return 0; | |
224 | } | |
225 | ||
226 | /* If using GCC, we can safely declare strlen this way. | |
227 | If not using GCC, it is ok not to declare it. */ | |
228 | #ifdef __GNUC__ | |
229 | /* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h. | |
230 | That was relevant to code that was here before. */ | |
231 | #if !defined (__STDC__) || !__STDC__ | |
232 | /* gcc with -traditional declares the built-in strlen to return int, | |
233 | and has done so at least since version 2.4.5. -- rms. */ | |
234 | extern int strlen (const char *); | |
235 | #endif /* not __STDC__ */ | |
236 | #endif /* __GNUC__ */ | |
237 | ||
238 | #endif /* not __GNU_LIBRARY__ */ | |
239 | \f | |
240 | /* Handle permutation of arguments. */ | |
241 | ||
242 | /* Describe the part of ARGV that contains non-options that have | |
243 | been skipped. `first_nonopt' is the index in ARGV of the first of them; | |
244 | `last_nonopt' is the index after the last of them. */ | |
245 | ||
246 | static int first_nonopt; | |
247 | static int last_nonopt; | |
248 | ||
249 | #ifdef _LIBC | |
250 | /* Bash 2.0 gives us an environment variable containing flags | |
251 | indicating ARGV elements that should not be considered arguments. */ | |
252 | ||
253 | /* Defined in getopt_init.c */ | |
254 | extern char *__getopt_nonoption_flags; | |
255 | ||
256 | static int nonoption_flags_max_len; | |
257 | static int nonoption_flags_len; | |
258 | ||
259 | static int original_argc; | |
260 | static char *const *original_argv; | |
261 | ||
262 | extern pid_t __libc_pid; | |
263 | ||
264 | /* Make sure the environment variable bash 2.0 puts in the environment | |
265 | is valid for the getopt call we must make sure that the ARGV passed | |
266 | to getopt is that one passed to the process. */ | |
267 | static void | |
268 | store_args_and_env (int argc, char *const *argv) | |
269 | { | |
270 | /* XXX This is no good solution. We should rather copy the args so | |
271 | that we can compare them later. But we must not use malloc(3). */ | |
272 | original_argc = argc; | |
273 | original_argv = argv; | |
274 | } | |
275 | text_set_element (__libc_subinit, store_args_and_env); | |
276 | ||
277 | # define SWAP_FLAGS(ch1, ch2) \ | |
278 | if (nonoption_flags_len > 0) \ | |
279 | { \ | |
280 | char __tmp = __getopt_nonoption_flags[ch1]; \ | |
281 | __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \ | |
282 | __getopt_nonoption_flags[ch2] = __tmp; \ | |
283 | } | |
284 | #else /* !_LIBC */ | |
285 | # define SWAP_FLAGS(ch1, ch2) | |
286 | #endif /* _LIBC */ | |
287 | ||
288 | /* Exchange two adjacent subsequences of ARGV. | |
289 | One subsequence is elements [first_nonopt,last_nonopt) | |
290 | which contains all the non-options that have been skipped so far. | |
291 | The other is elements [last_nonopt,optind), which contains all | |
292 | the options processed since those non-options were skipped. | |
293 | ||
294 | `first_nonopt' and `last_nonopt' are relocated so that they describe | |
295 | the new indices of the non-options in ARGV after they are moved. */ | |
296 | ||
297 | #if defined (__STDC__) && __STDC__ | |
298 | static void exchange (char **); | |
299 | #endif | |
300 | ||
301 | static void | |
302 | exchange (argv) | |
303 | char **argv; | |
304 | { | |
305 | int bottom = first_nonopt; | |
306 | int middle = last_nonopt; | |
307 | int top = optind; | |
308 | char *tem; | |
309 | ||
310 | /* Exchange the shorter segment with the far end of the longer segment. | |
311 | That puts the shorter segment into the right place. | |
312 | It leaves the longer segment in the right place overall, | |
313 | but it consists of two parts that need to be swapped next. */ | |
314 | ||
315 | #ifdef _LIBC | |
316 | /* First make sure the handling of the `__getopt_nonoption_flags' | |
317 | string can work normally. Our top argument must be in the range | |
318 | of the string. */ | |
319 | if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len) | |
320 | { | |
321 | /* We must extend the array. The user plays games with us and | |
322 | presents new arguments. */ | |
323 | char *new_str = malloc (top + 1); | |
324 | if (new_str == NULL) | |
325 | nonoption_flags_len = nonoption_flags_max_len = 0; | |
326 | else | |
327 | { | |
328 | memcpy (new_str, __getopt_nonoption_flags, nonoption_flags_max_len); | |
329 | memset (&new_str[nonoption_flags_max_len], '\0', | |
330 | top + 1 - nonoption_flags_max_len); | |
331 | nonoption_flags_max_len = top + 1; | |
332 | __getopt_nonoption_flags = new_str; | |
333 | } | |
334 | } | |
335 | #endif | |
336 | ||
337 | while (top > middle && middle > bottom) | |
338 | { | |
339 | if (top - middle > middle - bottom) | |
340 | { | |
341 | /* Bottom segment is the short one. */ | |
342 | int len = middle - bottom; | |
343 | register int i; | |
344 | ||
345 | /* Swap it with the top part of the top segment. */ | |
346 | for (i = 0; i < len; i++) | |
347 | { | |
348 | tem = argv[bottom + i]; | |
349 | argv[bottom + i] = argv[top - (middle - bottom) + i]; | |
350 | argv[top - (middle - bottom) + i] = tem; | |
351 | SWAP_FLAGS (bottom + i, top - (middle - bottom) + i); | |
352 | } | |
353 | /* Exclude the moved bottom segment from further swapping. */ | |
354 | top -= len; | |
355 | } | |
356 | else | |
357 | { | |
358 | /* Top segment is the short one. */ | |
359 | int len = top - middle; | |
360 | register int i; | |
361 | ||
362 | /* Swap it with the bottom part of the bottom segment. */ | |
363 | for (i = 0; i < len; i++) | |
364 | { | |
365 | tem = argv[bottom + i]; | |
366 | argv[bottom + i] = argv[middle + i]; | |
367 | argv[middle + i] = tem; | |
368 | SWAP_FLAGS (bottom + i, middle + i); | |
369 | } | |
370 | /* Exclude the moved top segment from further swapping. */ | |
371 | bottom += len; | |
372 | } | |
373 | } | |
374 | ||
375 | /* Update records for the slots the non-options now occupy. */ | |
376 | ||
377 | first_nonopt += (optind - last_nonopt); | |
378 | last_nonopt = optind; | |
379 | } | |
380 | ||
381 | /* Initialize the internal data when the first call is made. */ | |
382 | ||
383 | #if defined (__STDC__) && __STDC__ | |
384 | static const char *_getopt_initialize (int, char *const *, const char *); | |
385 | #endif | |
386 | static const char * | |
387 | _getopt_initialize (argc, argv, optstring) | |
388 | int argc; | |
389 | char *const *argv; | |
390 | const char *optstring; | |
391 | { | |
392 | /* Start processing options with ARGV-element 1 (since ARGV-element 0 | |
393 | is the program name); the sequence of previously skipped | |
394 | non-option ARGV-elements is empty. */ | |
395 | ||
396 | first_nonopt = last_nonopt = optind; | |
397 | ||
398 | nextchar = NULL; | |
399 | ||
400 | posixly_correct = getenv ("POSIXLY_CORRECT"); | |
401 | ||
402 | /* Determine how to handle the ordering of options and nonoptions. */ | |
403 | ||
404 | if (optstring[0] == '-') | |
405 | { | |
406 | ordering = RETURN_IN_ORDER; | |
407 | ++optstring; | |
408 | } | |
409 | else if (optstring[0] == '+') | |
410 | { | |
411 | ordering = REQUIRE_ORDER; | |
412 | ++optstring; | |
413 | } | |
414 | else if (posixly_correct != NULL) | |
415 | ordering = REQUIRE_ORDER; | |
416 | else | |
417 | ordering = PERMUTE; | |
418 | ||
419 | #ifdef _LIBC | |
420 | if (posixly_correct == NULL | |
421 | && argc == original_argc && argv == original_argv) | |
422 | { | |
423 | if (nonoption_flags_max_len == 0) | |
424 | { | |
425 | if (__getopt_nonoption_flags == NULL | |
426 | || __getopt_nonoption_flags[0] == '\0') | |
427 | nonoption_flags_max_len = -1; | |
428 | else | |
429 | { | |
430 | const char *orig_str = __getopt_nonoption_flags; | |
431 | int len = nonoption_flags_max_len = strlen (orig_str); | |
432 | if (nonoption_flags_max_len < argc) | |
433 | nonoption_flags_max_len = argc; | |
434 | __getopt_nonoption_flags = | |
435 | (char *) malloc (nonoption_flags_max_len); | |
436 | if (__getopt_nonoption_flags == NULL) | |
437 | nonoption_flags_max_len = -1; | |
438 | else | |
439 | { | |
440 | memcpy (__getopt_nonoption_flags, orig_str, len); | |
441 | memset (&__getopt_nonoption_flags[len], '\0', | |
442 | nonoption_flags_max_len - len); | |
443 | } | |
444 | } | |
445 | } | |
446 | nonoption_flags_len = nonoption_flags_max_len; | |
447 | } | |
448 | else | |
449 | nonoption_flags_len = 0; | |
450 | #endif | |
451 | ||
452 | return optstring; | |
453 | } | |
454 | \f | |
455 | /* Scan elements of ARGV (whose length is ARGC) for option characters | |
456 | given in OPTSTRING. | |
457 | ||
458 | If an element of ARGV starts with '-', and is not exactly "-" or "--", | |
459 | then it is an option element. The characters of this element | |
460 | (aside from the initial '-') are option characters. If `getopt' | |
461 | is called repeatedly, it returns successively each of the option characters | |
462 | from each of the option elements. | |
463 | ||
464 | If `getopt' finds another option character, it returns that character, | |
465 | updating `optind' and `nextchar' so that the next call to `getopt' can | |
466 | resume the scan with the following option character or ARGV-element. | |
467 | ||
468 | If there are no more option characters, `getopt' returns -1. | |
469 | Then `optind' is the index in ARGV of the first ARGV-element | |
470 | that is not an option. (The ARGV-elements have been permuted | |
471 | so that those that are not options now come last.) | |
472 | ||
473 | OPTSTRING is a string containing the legitimate option characters. | |
474 | If an option character is seen that is not listed in OPTSTRING, | |
475 | return '?' after printing an error message. If you set `opterr' to | |
476 | zero, the error message is suppressed but we still return '?'. | |
477 | ||
478 | If a char in OPTSTRING is followed by a colon, that means it wants an arg, | |
479 | so the following text in the same ARGV-element, or the text of the following | |
480 | ARGV-element, is returned in `optarg'. Two colons mean an option that | |
481 | wants an optional arg; if there is text in the current ARGV-element, | |
482 | it is returned in `optarg', otherwise `optarg' is set to zero. | |
483 | ||
484 | If OPTSTRING starts with `-' or `+', it requests different methods of | |
485 | handling the non-option ARGV-elements. | |
486 | See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above. | |
487 | ||
488 | Long-named options begin with `--' instead of `-'. | |
489 | Their names may be abbreviated as long as the abbreviation is unique | |
490 | or is an exact match for some defined option. If they have an | |
491 | argument, it follows the option name in the same ARGV-element, separated | |
492 | from the option name by a `=', or else the in next ARGV-element. | |
493 | When `getopt' finds a long-named option, it returns 0 if that option's | |
494 | `flag' field is nonzero, the value of the option's `val' field | |
495 | if the `flag' field is zero. | |
496 | ||
497 | The elements of ARGV aren't really const, because we permute them. | |
498 | But we pretend they're const in the prototype to be compatible | |
499 | with other systems. | |
500 | ||
501 | LONGOPTS is a vector of `struct option' terminated by an | |
502 | element containing a name which is zero. | |
503 | ||
504 | LONGIND returns the index in LONGOPT of the long-named option found. | |
505 | It is only valid when a long-named option has been found by the most | |
506 | recent call. | |
507 | ||
508 | If LONG_ONLY is nonzero, '-' as well as '--' can introduce | |
509 | long-named options. */ | |
510 | ||
511 | int | |
512 | _getopt_internal (argc, argv, optstring, longopts, longind, long_only) | |
513 | int argc; | |
514 | char *const *argv; | |
515 | const char *optstring; | |
516 | const struct option *longopts; | |
517 | int *longind; | |
518 | int long_only; | |
519 | { | |
520 | optarg = NULL; | |
521 | ||
522 | if (optind == 0 || !__getopt_initialized) | |
523 | { | |
524 | if (optind == 0) | |
525 | optind = 1; /* Don't scan ARGV[0], the program name. */ | |
526 | optstring = _getopt_initialize (argc, argv, optstring); | |
527 | __getopt_initialized = 1; | |
528 | } | |
529 | ||
530 | /* Test whether ARGV[optind] points to a non-option argument. | |
531 | Either it does not have option syntax, or there is an environment flag | |
532 | from the shell indicating it is not an option. The later information | |
533 | is only used when the used in the GNU libc. */ | |
534 | #ifdef _LIBC | |
535 | #define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \ | |
536 | || (optind < nonoption_flags_len \ | |
537 | && __getopt_nonoption_flags[optind] == '1')) | |
538 | #else | |
539 | #define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0') | |
540 | #endif | |
541 | ||
542 | if (nextchar == NULL || *nextchar == '\0') | |
543 | { | |
544 | /* Advance to the next ARGV-element. */ | |
545 | ||
546 | /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been | |
547 | moved back by the user (who may also have changed the arguments). */ | |
548 | if (last_nonopt > optind) | |
549 | last_nonopt = optind; | |
550 | if (first_nonopt > optind) | |
551 | first_nonopt = optind; | |
552 | ||
553 | if (ordering == PERMUTE) | |
554 | { | |
555 | /* If we have just processed some options following some non-options, | |
556 | exchange them so that the options come first. */ | |
557 | ||
558 | if (first_nonopt != last_nonopt && last_nonopt != optind) | |
559 | exchange ((char **) argv); | |
560 | else if (last_nonopt != optind) | |
561 | first_nonopt = optind; | |
562 | ||
563 | /* Skip any additional non-options | |
564 | and extend the range of non-options previously skipped. */ | |
565 | ||
566 | while (optind < argc && NONOPTION_P) | |
567 | optind++; | |
568 | last_nonopt = optind; | |
569 | } | |
570 | ||
571 | /* The special ARGV-element `--' means premature end of options. | |
572 | Skip it like a null option, | |
573 | then exchange with previous non-options as if it were an option, | |
574 | then skip everything else like a non-option. */ | |
575 | ||
576 | if (optind != argc && !strcmp (argv[optind], "--")) | |
577 | { | |
578 | optind++; | |
579 | ||
580 | if (first_nonopt != last_nonopt && last_nonopt != optind) | |
581 | exchange ((char **) argv); | |
582 | else if (first_nonopt == last_nonopt) | |
583 | first_nonopt = optind; | |
584 | last_nonopt = argc; | |
585 | ||
586 | optind = argc; | |
587 | } | |
588 | ||
589 | /* If we have done all the ARGV-elements, stop the scan | |
590 | and back over any non-options that we skipped and permuted. */ | |
591 | ||
592 | if (optind == argc) | |
593 | { | |
594 | /* Set the next-arg-index to point at the non-options | |
595 | that we previously skipped, so the caller will digest them. */ | |
596 | if (first_nonopt != last_nonopt) | |
597 | optind = first_nonopt; | |
598 | return -1; | |
599 | } | |
600 | ||
601 | /* If we have come to a non-option and did not permute it, | |
602 | either stop the scan or describe it to the caller and pass it by. */ | |
603 | ||
604 | if (NONOPTION_P) | |
605 | { | |
606 | if (ordering == REQUIRE_ORDER) | |
607 | return -1; | |
608 | optarg = argv[optind++]; | |
609 | return 1; | |
610 | } | |
611 | ||
612 | /* We have found another option-ARGV-element. | |
613 | Skip the initial punctuation. */ | |
614 | ||
615 | nextchar = (argv[optind] + 1 | |
616 | + (longopts != NULL && argv[optind][1] == '-')); | |
617 | } | |
618 | ||
619 | /* Decode the current option-ARGV-element. */ | |
620 | ||
621 | /* Check whether the ARGV-element is a long option. | |
622 | ||
623 | If long_only and the ARGV-element has the form "-f", where f is | |
624 | a valid short option, don't consider it an abbreviated form of | |
625 | a long option that starts with f. Otherwise there would be no | |
626 | way to give the -f short option. | |
627 | ||
628 | On the other hand, if there's a long option "fubar" and | |
629 | the ARGV-element is "-fu", do consider that an abbreviation of | |
630 | the long option, just like "--fu", and not "-f" with arg "u". | |
631 | ||
632 | This distinction seems to be the most useful approach. */ | |
633 | ||
634 | if (longopts != NULL | |
635 | && (argv[optind][1] == '-' | |
636 | || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1]))))) | |
637 | { | |
638 | char *nameend; | |
639 | const struct option *p; | |
640 | const struct option *pfound = NULL; | |
641 | int exact = 0; | |
642 | int ambig = 0; | |
643 | int indfound = -1; | |
644 | int option_index; | |
645 | ||
646 | for (nameend = nextchar; *nameend && *nameend != '='; nameend++) | |
647 | /* Do nothing. */ ; | |
648 | ||
649 | /* Test all long options for either exact match | |
650 | or abbreviated matches. */ | |
651 | for (p = longopts, option_index = 0; p->name; p++, option_index++) | |
652 | if (!strncmp (p->name, nextchar, nameend - nextchar)) | |
653 | { | |
654 | if ((unsigned int) (nameend - nextchar) | |
655 | == (unsigned int) strlen (p->name)) | |
656 | { | |
657 | /* Exact match found. */ | |
658 | pfound = p; | |
659 | indfound = option_index; | |
660 | exact = 1; | |
661 | break; | |
662 | } | |
663 | else if (pfound == NULL) | |
664 | { | |
665 | /* First nonexact match found. */ | |
666 | pfound = p; | |
667 | indfound = option_index; | |
668 | } | |
669 | else | |
670 | /* Second or later nonexact match found. */ | |
671 | ambig = 1; | |
672 | } | |
673 | ||
674 | if (ambig && !exact) | |
675 | { | |
676 | if (opterr) | |
677 | fprintf (stderr, _("%s: option `%s' is ambiguous\n"), | |
678 | argv[0], argv[optind]); | |
679 | nextchar += strlen (nextchar); | |
680 | optind++; | |
681 | optopt = 0; | |
682 | return '?'; | |
683 | } | |
684 | ||
685 | if (pfound != NULL) | |
686 | { | |
687 | option_index = indfound; | |
688 | optind++; | |
689 | if (*nameend) | |
690 | { | |
691 | /* Don't test has_arg with >, because some C compilers don't | |
692 | allow it to be used on enums. */ | |
693 | if (pfound->has_arg) | |
694 | optarg = nameend + 1; | |
695 | else | |
696 | { | |
697 | if (opterr) | |
698 | { | |
699 | if (argv[optind - 1][1] == '-') | |
700 | /* --option */ | |
701 | fprintf (stderr, | |
702 | _("%s: option `--%s' doesn't allow an argument\n"), | |
703 | argv[0], pfound->name); | |
704 | else | |
705 | /* +option or -option */ | |
706 | fprintf (stderr, | |
707 | _("%s: option `%c%s' doesn't allow an argument\n"), | |
708 | argv[0], argv[optind - 1][0], pfound->name); | |
709 | } | |
710 | ||
711 | nextchar += strlen (nextchar); | |
712 | ||
713 | optopt = pfound->val; | |
714 | return '?'; | |
715 | } | |
716 | } | |
717 | else if (pfound->has_arg == 1) | |
718 | { | |
719 | if (optind < argc) | |
720 | optarg = argv[optind++]; | |
721 | else | |
722 | { | |
723 | if (opterr) | |
724 | fprintf (stderr, | |
725 | _("%s: option `%s' requires an argument\n"), | |
726 | argv[0], argv[optind - 1]); | |
727 | nextchar += strlen (nextchar); | |
728 | optopt = pfound->val; | |
729 | return optstring[0] == ':' ? ':' : '?'; | |
730 | } | |
731 | } | |
732 | nextchar += strlen (nextchar); | |
733 | if (longind != NULL) | |
734 | *longind = option_index; | |
735 | if (pfound->flag) | |
736 | { | |
737 | *(pfound->flag) = pfound->val; | |
738 | return 0; | |
739 | } | |
740 | return pfound->val; | |
741 | } | |
742 | ||
743 | /* Can't find it as a long option. If this is not getopt_long_only, | |
744 | or the option starts with '--' or is not a valid short | |
745 | option, then it's an error. | |
746 | Otherwise interpret it as a short option. */ | |
747 | if (!long_only || argv[optind][1] == '-' | |
748 | || my_index (optstring, *nextchar) == NULL) | |
749 | { | |
750 | if (opterr) | |
751 | { | |
752 | if (argv[optind][1] == '-') | |
753 | /* --option */ | |
754 | fprintf (stderr, _("%s: unrecognized option `--%s'\n"), | |
755 | argv[0], nextchar); | |
756 | else | |
757 | /* +option or -option */ | |
758 | fprintf (stderr, _("%s: unrecognized option `%c%s'\n"), | |
759 | argv[0], argv[optind][0], nextchar); | |
760 | } | |
761 | nextchar = (char *) ""; | |
762 | optind++; | |
763 | optopt = 0; | |
764 | return '?'; | |
765 | } | |
766 | } | |
767 | ||
768 | /* Look at and handle the next short option-character. */ | |
769 | ||
770 | { | |
771 | char c = *nextchar++; | |
772 | char *temp = my_index (optstring, c); | |
773 | ||
774 | /* Increment `optind' when we start to process its last character. */ | |
775 | if (*nextchar == '\0') | |
776 | ++optind; | |
777 | ||
778 | if (temp == NULL || c == ':') | |
779 | { | |
780 | if (opterr) | |
781 | { | |
782 | if (posixly_correct) | |
783 | /* 1003.2 specifies the format of this message. */ | |
784 | fprintf (stderr, _("%s: illegal option -- %c\n"), | |
785 | argv[0], c); | |
786 | else | |
787 | fprintf (stderr, _("%s: invalid option -- %c\n"), | |
788 | argv[0], c); | |
789 | } | |
790 | optopt = c; | |
791 | return '?'; | |
792 | } | |
793 | /* Convenience. Treat POSIX -W foo same as long option --foo */ | |
794 | if (temp[0] == 'W' && temp[1] == ';') | |
795 | { | |
796 | char *nameend; | |
797 | const struct option *p; | |
798 | const struct option *pfound = NULL; | |
799 | int exact = 0; | |
800 | int ambig = 0; | |
801 | int indfound = 0; | |
802 | int option_index; | |
803 | ||
804 | /* This is an option that requires an argument. */ | |
805 | if (*nextchar != '\0') | |
806 | { | |
807 | optarg = nextchar; | |
808 | /* If we end this ARGV-element by taking the rest as an arg, | |
809 | we must advance to the next element now. */ | |
810 | optind++; | |
811 | } | |
812 | else if (optind == argc) | |
813 | { | |
814 | if (opterr) | |
815 | { | |
816 | /* 1003.2 specifies the format of this message. */ | |
817 | fprintf (stderr, _("%s: option requires an argument -- %c\n"), | |
818 | argv[0], c); | |
819 | } | |
820 | optopt = c; | |
821 | if (optstring[0] == ':') | |
822 | c = ':'; | |
823 | else | |
824 | c = '?'; | |
825 | return c; | |
826 | } | |
827 | else | |
828 | /* We already incremented `optind' once; | |
829 | increment it again when taking next ARGV-elt as argument. */ | |
830 | optarg = argv[optind++]; | |
831 | ||
832 | /* optarg is now the argument, see if it's in the | |
833 | table of longopts. */ | |
834 | ||
835 | for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++) | |
836 | /* Do nothing. */ ; | |
837 | ||
838 | /* Test all long options for either exact match | |
839 | or abbreviated matches. */ | |
840 | for (p = longopts, option_index = 0; p->name; p++, option_index++) | |
841 | if (!strncmp (p->name, nextchar, nameend - nextchar)) | |
842 | { | |
843 | if ((unsigned int) (nameend - nextchar) == strlen (p->name)) | |
844 | { | |
845 | /* Exact match found. */ | |
846 | pfound = p; | |
847 | indfound = option_index; | |
848 | exact = 1; | |
849 | break; | |
850 | } | |
851 | else if (pfound == NULL) | |
852 | { | |
853 | /* First nonexact match found. */ | |
854 | pfound = p; | |
855 | indfound = option_index; | |
856 | } | |
857 | else | |
858 | /* Second or later nonexact match found. */ | |
859 | ambig = 1; | |
860 | } | |
861 | if (ambig && !exact) | |
862 | { | |
863 | if (opterr) | |
864 | fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"), | |
865 | argv[0], argv[optind]); | |
866 | nextchar += strlen (nextchar); | |
867 | optind++; | |
868 | return '?'; | |
869 | } | |
870 | if (pfound != NULL) | |
871 | { | |
872 | option_index = indfound; | |
873 | if (*nameend) | |
874 | { | |
875 | /* Don't test has_arg with >, because some C compilers don't | |
876 | allow it to be used on enums. */ | |
877 | if (pfound->has_arg) | |
878 | optarg = nameend + 1; | |
879 | else | |
880 | { | |
881 | if (opterr) | |
882 | fprintf (stderr, _("\ | |
883 | %s: option `-W %s' doesn't allow an argument\n"), | |
884 | argv[0], pfound->name); | |
885 | ||
886 | nextchar += strlen (nextchar); | |
887 | return '?'; | |
888 | } | |
889 | } | |
890 | else if (pfound->has_arg == 1) | |
891 | { | |
892 | if (optind < argc) | |
893 | optarg = argv[optind++]; | |
894 | else | |
895 | { | |
896 | if (opterr) | |
897 | fprintf (stderr, | |
898 | _("%s: option `%s' requires an argument\n"), | |
899 | argv[0], argv[optind - 1]); | |
900 | nextchar += strlen (nextchar); | |
901 | return optstring[0] == ':' ? ':' : '?'; | |
902 | } | |
903 | } | |
904 | nextchar += strlen (nextchar); | |
905 | if (longind != NULL) | |
906 | *longind = option_index; | |
907 | if (pfound->flag) | |
908 | { | |
909 | *(pfound->flag) = pfound->val; | |
910 | return 0; | |
911 | } | |
912 | return pfound->val; | |
913 | } | |
914 | nextchar = NULL; | |
915 | return 'W'; /* Let the application handle it. */ | |
916 | } | |
917 | if (temp[1] == ':') | |
918 | { | |
919 | if (temp[2] == ':') | |
920 | { | |
921 | /* This is an option that accepts an argument optionally. */ | |
922 | if (*nextchar != '\0') | |
923 | { | |
924 | optarg = nextchar; | |
925 | optind++; | |
926 | } | |
927 | else | |
928 | optarg = NULL; | |
929 | nextchar = NULL; | |
930 | } | |
931 | else | |
932 | { | |
933 | /* This is an option that requires an argument. */ | |
934 | if (*nextchar != '\0') | |
935 | { | |
936 | optarg = nextchar; | |
937 | /* If we end this ARGV-element by taking the rest as an arg, | |
938 | we must advance to the next element now. */ | |
939 | optind++; | |
940 | } | |
941 | else if (optind == argc) | |
942 | { | |
943 | if (opterr) | |
944 | { | |
945 | /* 1003.2 specifies the format of this message. */ | |
946 | fprintf (stderr, | |
947 | _("%s: option requires an argument -- %c\n"), | |
948 | argv[0], c); | |
949 | } | |
950 | optopt = c; | |
951 | if (optstring[0] == ':') | |
952 | c = ':'; | |
953 | else | |
954 | c = '?'; | |
955 | } | |
956 | else | |
957 | /* We already incremented `optind' once; | |
958 | increment it again when taking next ARGV-elt as argument. */ | |
959 | optarg = argv[optind++]; | |
960 | nextchar = NULL; | |
961 | } | |
962 | } | |
963 | return c; | |
964 | } | |
965 | } | |
966 | ||
967 | int | |
968 | getopt (argc, argv, optstring) | |
969 | int argc; | |
970 | char *const *argv; | |
971 | const char *optstring; | |
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 | |
987 | main (argc, argv) | |
988 | int argc; | |
989 | char **argv; | |
990 | { | |
991 | int c; | |
992 | int digit_optind = 0; | |
993 | ||
994 | while (1) | |
995 | { | |
996 | int this_option_optind = optind ? optind : 1; | |
997 | ||
998 | c = getopt (argc, argv, "abc:d:0123456789"); | |
999 | if (c == -1) | |
1000 | break; | |
1001 | ||
1002 | switch (c) | |
1003 | { | |
1004 | case '0': | |
1005 | case '1': | |
1006 | case '2': | |
1007 | case '3': | |
1008 | case '4': | |
1009 | case '5': | |
1010 | case '6': | |
1011 | case '7': | |
1012 | case '8': | |
1013 | case '9': | |
1014 | if (digit_optind != 0 && digit_optind != this_option_optind) | |
1015 | printf ("digits occur in two different argv-elements.\n"); | |
1016 | digit_optind = this_option_optind; | |
1017 | printf ("option %c\n", c); | |
1018 | break; | |
1019 | ||
1020 | case 'a': | |
1021 | printf ("option a\n"); | |
1022 | break; | |
1023 | ||
1024 | case 'b': | |
1025 | printf ("option b\n"); | |
1026 | break; | |
1027 | ||
1028 | case 'c': | |
1029 | printf ("option c with value `%s'\n", optarg); | |
1030 | break; | |
1031 | ||
1032 | case '?': | |
1033 | break; | |
1034 | ||
1035 | default: | |
1036 | printf ("?? getopt returned character code 0%o ??\n", c); | |
1037 | } | |
1038 | } | |
1039 | ||
1040 | if (optind < argc) | |
1041 | { | |
1042 | printf ("non-option ARGV-elements: "); | |
1043 | while (optind < argc) | |
1044 | printf ("%s ", argv[optind++]); | |
1045 | printf ("\n"); | |
1046 | } | |
1047 | ||
1048 | exit (0); | |
1049 | } | |
1050 | ||
1051 | #endif /* TEST */ |