1 | /* Getopt for GNU. |
---|
2 | NOTE: getopt is now part of the C library, so if you don't know what |
---|
3 | "Keep this file name-space clean" means, talk to drepper@gnu.org |
---|
4 | before changing it! |
---|
5 | |
---|
6 | Copyright (C) 1987, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98 |
---|
7 | Free Software Foundation, Inc. |
---|
8 | |
---|
9 | NOTE: This source is derived from an old version taken from the GNU C |
---|
10 | Library (glibc). |
---|
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 |
---|
24 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
---|
25 | USA. */ |
---|
26 | |
---|
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. */ |
---|
85 | # if (HAVE_LIBINTL_H && ENABLE_NLS) || defined _LIBC |
---|
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 | |
---|
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 | |
---|
215 | #ifndef getenv |
---|
216 | extern char *getenv (); |
---|
217 | #endif |
---|
218 | |
---|
219 | static char * |
---|
220 | my_index (str, chr) |
---|
221 | const char *str; |
---|
222 | 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 (argv) |
---|
311 | char **argv; |
---|
312 | { |
---|
313 | int bottom = first_nonopt; |
---|
314 | int middle = last_nonopt; |
---|
315 | int top = optind; |
---|
316 | char *tem; |
---|
317 | |
---|
318 | /* Exchange the shorter segment with the far end of the longer segment. |
---|
319 | That puts the shorter segment into the right place. |
---|
320 | It leaves the longer segment in the right place overall, |
---|
321 | but it consists of two parts that need to be swapped next. */ |
---|
322 | |
---|
323 | #ifdef _LIBC |
---|
324 | /* First make sure the handling of the `__getopt_nonoption_flags' |
---|
325 | string can work normally. Our top argument must be in the range |
---|
326 | of the string. */ |
---|
327 | if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len) |
---|
328 | { |
---|
329 | /* We must extend the array. The user plays games with us and |
---|
330 | presents new arguments. */ |
---|
331 | char *new_str = malloc (top + 1); |
---|
332 | if (new_str == NULL) |
---|
333 | nonoption_flags_len = nonoption_flags_max_len = 0; |
---|
334 | else |
---|
335 | { |
---|
336 | memset (__mempcpy (new_str, __getopt_nonoption_flags, |
---|
337 | nonoption_flags_max_len), |
---|
338 | '\0', top + 1 - nonoption_flags_max_len); |
---|
339 | nonoption_flags_max_len = top + 1; |
---|
340 | __getopt_nonoption_flags = new_str; |
---|
341 | } |
---|
342 | } |
---|
343 | #endif |
---|
344 | |
---|
345 | while (top > middle && middle > bottom) |
---|
346 | { |
---|
347 | if (top - middle > middle - bottom) |
---|
348 | { |
---|
349 | /* Bottom segment is the short one. */ |
---|
350 | int len = middle - bottom; |
---|
351 | register int i; |
---|
352 | |
---|
353 | /* Swap it with the top part of the top segment. */ |
---|
354 | for (i = 0; i < len; i++) |
---|
355 | { |
---|
356 | tem = argv[bottom + i]; |
---|
357 | argv[bottom + i] = argv[top - (middle - bottom) + i]; |
---|
358 | argv[top - (middle - bottom) + i] = tem; |
---|
359 | SWAP_FLAGS (bottom + i, top - (middle - bottom) + i); |
---|
360 | } |
---|
361 | /* Exclude the moved bottom segment from further swapping. */ |
---|
362 | top -= len; |
---|
363 | } |
---|
364 | else |
---|
365 | { |
---|
366 | /* Top segment is the short one. */ |
---|
367 | int len = top - middle; |
---|
368 | register int i; |
---|
369 | |
---|
370 | /* Swap it with the bottom part of the bottom segment. */ |
---|
371 | for (i = 0; i < len; i++) |
---|
372 | { |
---|
373 | tem = argv[bottom + i]; |
---|
374 | argv[bottom + i] = argv[middle + i]; |
---|
375 | argv[middle + i] = tem; |
---|
376 | SWAP_FLAGS (bottom + i, middle + i); |
---|
377 | } |
---|
378 | /* Exclude the moved top segment from further swapping. */ |
---|
379 | bottom += len; |
---|
380 | } |
---|
381 | } |
---|
382 | |
---|
383 | /* Update records for the slots the non-options now occupy. */ |
---|
384 | |
---|
385 | first_nonopt += (optind - last_nonopt); |
---|
386 | last_nonopt = optind; |
---|
387 | } |
---|
388 | |
---|
389 | /* Initialize the internal data when the first call is made. */ |
---|
390 | |
---|
391 | #if defined __STDC__ && __STDC__ |
---|
392 | static const char *_getopt_initialize (int, char *const *, const char *); |
---|
393 | #endif |
---|
394 | static const char * |
---|
395 | _getopt_initialize (argc, argv, optstring) |
---|
396 | int argc; |
---|
397 | char *const *argv; |
---|
398 | const char *optstring; |
---|
399 | { |
---|
400 | /* Start processing options with ARGV-element 1 (since ARGV-element 0 |
---|
401 | is the program name); the sequence of previously skipped |
---|
402 | non-option ARGV-elements is empty. */ |
---|
403 | |
---|
404 | first_nonopt = last_nonopt = optind; |
---|
405 | |
---|
406 | nextchar = NULL; |
---|
407 | |
---|
408 | posixly_correct = getenv ("POSIXLY_CORRECT"); |
---|
409 | |
---|
410 | /* Determine how to handle the ordering of options and nonoptions. */ |
---|
411 | |
---|
412 | if (optstring[0] == '-') |
---|
413 | { |
---|
414 | ordering = RETURN_IN_ORDER; |
---|
415 | ++optstring; |
---|
416 | } |
---|
417 | else if (optstring[0] == '+') |
---|
418 | { |
---|
419 | ordering = REQUIRE_ORDER; |
---|
420 | ++optstring; |
---|
421 | } |
---|
422 | else if (posixly_correct != NULL) |
---|
423 | ordering = REQUIRE_ORDER; |
---|
424 | else |
---|
425 | ordering = PERMUTE; |
---|
426 | |
---|
427 | #ifdef _LIBC |
---|
428 | if (posixly_correct == NULL |
---|
429 | && argc == original_argc && argv == original_argv) |
---|
430 | { |
---|
431 | if (nonoption_flags_max_len == 0) |
---|
432 | { |
---|
433 | if (__getopt_nonoption_flags == NULL |
---|
434 | || __getopt_nonoption_flags[0] == '\0') |
---|
435 | nonoption_flags_max_len = -1; |
---|
436 | else |
---|
437 | { |
---|
438 | const char *orig_str = __getopt_nonoption_flags; |
---|
439 | int len = nonoption_flags_max_len = strlen (orig_str); |
---|
440 | if (nonoption_flags_max_len < argc) |
---|
441 | nonoption_flags_max_len = argc; |
---|
442 | __getopt_nonoption_flags = |
---|
443 | (char *) malloc (nonoption_flags_max_len); |
---|
444 | if (__getopt_nonoption_flags == NULL) |
---|
445 | nonoption_flags_max_len = -1; |
---|
446 | else |
---|
447 | memset (__mempcpy (__getopt_nonoption_flags, orig_str, len), |
---|
448 | '\0', nonoption_flags_max_len - len); |
---|
449 | } |
---|
450 | } |
---|
451 | nonoption_flags_len = nonoption_flags_max_len; |
---|
452 | } |
---|
453 | else |
---|
454 | nonoption_flags_len = 0; |
---|
455 | #endif |
---|
456 | |
---|
457 | return optstring; |
---|
458 | } |
---|
459 | |
---|
460 | /* Scan elements of ARGV (whose length is ARGC) for option characters |
---|
461 | given in OPTSTRING. |
---|
462 | |
---|
463 | If an element of ARGV starts with '-', and is not exactly "-" or "--", |
---|
464 | then it is an option element. The characters of this element |
---|
465 | (aside from the initial '-') are option characters. If `getopt' |
---|
466 | is called repeatedly, it returns successively each of the option characters |
---|
467 | from each of the option elements. |
---|
468 | |
---|
469 | If `getopt' finds another option character, it returns that character, |
---|
470 | updating `optind' and `nextchar' so that the next call to `getopt' can |
---|
471 | resume the scan with the following option character or ARGV-element. |
---|
472 | |
---|
473 | If there are no more option characters, `getopt' returns -1. |
---|
474 | Then `optind' is the index in ARGV of the first ARGV-element |
---|
475 | that is not an option. (The ARGV-elements have been permuted |
---|
476 | so that those that are not options now come last.) |
---|
477 | |
---|
478 | OPTSTRING is a string containing the legitimate option characters. |
---|
479 | If an option character is seen that is not listed in OPTSTRING, |
---|
480 | return '?' after printing an error message. If you set `opterr' to |
---|
481 | zero, the error message is suppressed but we still return '?'. |
---|
482 | |
---|
483 | If a char in OPTSTRING is followed by a colon, that means it wants an arg, |
---|
484 | so the following text in the same ARGV-element, or the text of the following |
---|
485 | ARGV-element, is returned in `optarg'. Two colons mean an option that |
---|
486 | wants an optional arg; if there is text in the current ARGV-element, |
---|
487 | it is returned in `optarg', otherwise `optarg' is set to zero. |
---|
488 | |
---|
489 | If OPTSTRING starts with `-' or `+', it requests different methods of |
---|
490 | handling the non-option ARGV-elements. |
---|
491 | See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above. |
---|
492 | |
---|
493 | Long-named options begin with `--' instead of `-'. |
---|
494 | Their names may be abbreviated as long as the abbreviation is unique |
---|
495 | or is an exact match for some defined option. If they have an |
---|
496 | argument, it follows the option name in the same ARGV-element, separated |
---|
497 | from the option name by a `=', or else the in next ARGV-element. |
---|
498 | When `getopt' finds a long-named option, it returns 0 if that option's |
---|
499 | `flag' field is nonzero, the value of the option's `val' field |
---|
500 | if the `flag' field is zero. |
---|
501 | |
---|
502 | The elements of ARGV aren't really const, because we permute them. |
---|
503 | But we pretend they're const in the prototype to be compatible |
---|
504 | with other systems. |
---|
505 | |
---|
506 | LONGOPTS is a vector of `struct option' terminated by an |
---|
507 | element containing a name which is zero. |
---|
508 | |
---|
509 | LONGIND returns the index in LONGOPT of the long-named option found. |
---|
510 | It is only valid when a long-named option has been found by the most |
---|
511 | recent call. |
---|
512 | |
---|
513 | If LONG_ONLY is nonzero, '-' as well as '--' can introduce |
---|
514 | long-named options. */ |
---|
515 | |
---|
516 | int |
---|
517 | _getopt_internal (argc, argv, optstring, longopts, longind, long_only) |
---|
518 | int argc; |
---|
519 | char *const *argv; |
---|
520 | const char *optstring; |
---|
521 | const struct option *longopts; |
---|
522 | int *longind; |
---|
523 | int long_only; |
---|
524 | { |
---|
525 | optarg = NULL; |
---|
526 | |
---|
527 | if (optind == 0 || !__getopt_initialized) |
---|
528 | { |
---|
529 | if (optind == 0) |
---|
530 | optind = 1; /* Don't scan ARGV[0], the program name. */ |
---|
531 | optstring = _getopt_initialize (argc, argv, optstring); |
---|
532 | __getopt_initialized = 1; |
---|
533 | } |
---|
534 | |
---|
535 | /* Test whether ARGV[optind] points to a non-option argument. |
---|
536 | Either it does not have option syntax, or there is an environment flag |
---|
537 | from the shell indicating it is not an option. The later information |
---|
538 | is only used when the used in the GNU libc. */ |
---|
539 | #ifdef _LIBC |
---|
540 | # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \ |
---|
541 | || (optind < nonoption_flags_len \ |
---|
542 | && __getopt_nonoption_flags[optind] == '1')) |
---|
543 | #else |
---|
544 | # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0') |
---|
545 | #endif |
---|
546 | |
---|
547 | if (nextchar == NULL || *nextchar == '\0') |
---|
548 | { |
---|
549 | /* Advance to the next ARGV-element. */ |
---|
550 | |
---|
551 | /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been |
---|
552 | moved back by the user (who may also have changed the arguments). */ |
---|
553 | if (last_nonopt > optind) |
---|
554 | last_nonopt = optind; |
---|
555 | if (first_nonopt > optind) |
---|
556 | first_nonopt = optind; |
---|
557 | |
---|
558 | if (ordering == PERMUTE) |
---|
559 | { |
---|
560 | /* If we have just processed some options following some non-options, |
---|
561 | exchange them so that the options come first. */ |
---|
562 | |
---|
563 | if (first_nonopt != last_nonopt && last_nonopt != optind) |
---|
564 | exchange ((char **) argv); |
---|
565 | else if (last_nonopt != optind) |
---|
566 | first_nonopt = optind; |
---|
567 | |
---|
568 | /* Skip any additional non-options |
---|
569 | and extend the range of non-options previously skipped. */ |
---|
570 | |
---|
571 | while (optind < argc && NONOPTION_P) |
---|
572 | optind++; |
---|
573 | last_nonopt = optind; |
---|
574 | } |
---|
575 | |
---|
576 | /* The special ARGV-element `--' means premature end of options. |
---|
577 | Skip it like a null option, |
---|
578 | then exchange with previous non-options as if it were an option, |
---|
579 | then skip everything else like a non-option. */ |
---|
580 | |
---|
581 | if (optind != argc && !strcmp (argv[optind], "--")) |
---|
582 | { |
---|
583 | optind++; |
---|
584 | |
---|
585 | if (first_nonopt != last_nonopt && last_nonopt != optind) |
---|
586 | exchange ((char **) argv); |
---|
587 | else if (first_nonopt == last_nonopt) |
---|
588 | first_nonopt = optind; |
---|
589 | last_nonopt = argc; |
---|
590 | |
---|
591 | optind = argc; |
---|
592 | } |
---|
593 | |
---|
594 | /* If we have done all the ARGV-elements, stop the scan |
---|
595 | and back over any non-options that we skipped and permuted. */ |
---|
596 | |
---|
597 | if (optind == argc) |
---|
598 | { |
---|
599 | /* Set the next-arg-index to point at the non-options |
---|
600 | that we previously skipped, so the caller will digest them. */ |
---|
601 | if (first_nonopt != last_nonopt) |
---|
602 | optind = first_nonopt; |
---|
603 | return -1; |
---|
604 | } |
---|
605 | |
---|
606 | /* If we have come to a non-option and did not permute it, |
---|
607 | either stop the scan or describe it to the caller and pass it by. */ |
---|
608 | |
---|
609 | if (NONOPTION_P) |
---|
610 | { |
---|
611 | if (ordering == REQUIRE_ORDER) |
---|
612 | return -1; |
---|
613 | optarg = argv[optind++]; |
---|
614 | return 1; |
---|
615 | } |
---|
616 | |
---|
617 | /* We have found another option-ARGV-element. |
---|
618 | Skip the initial punctuation. */ |
---|
619 | |
---|
620 | nextchar = (argv[optind] + 1 |
---|
621 | + (longopts != NULL && argv[optind][1] == '-')); |
---|
622 | } |
---|
623 | |
---|
624 | /* Decode the current option-ARGV-element. */ |
---|
625 | |
---|
626 | /* Check whether the ARGV-element is a long option. |
---|
627 | |
---|
628 | If long_only and the ARGV-element has the form "-f", where f is |
---|
629 | a valid short option, don't consider it an abbreviated form of |
---|
630 | a long option that starts with f. Otherwise there would be no |
---|
631 | way to give the -f short option. |
---|
632 | |
---|
633 | On the other hand, if there's a long option "fubar" and |
---|
634 | the ARGV-element is "-fu", do consider that an abbreviation of |
---|
635 | the long option, just like "--fu", and not "-f" with arg "u". |
---|
636 | |
---|
637 | This distinction seems to be the most useful approach. */ |
---|
638 | |
---|
639 | if (longopts != NULL |
---|
640 | && (argv[optind][1] == '-' |
---|
641 | || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1]))))) |
---|
642 | { |
---|
643 | char *nameend; |
---|
644 | const struct option *p; |
---|
645 | const struct option *pfound = NULL; |
---|
646 | int exact = 0; |
---|
647 | int ambig = 0; |
---|
648 | int indfound = -1; |
---|
649 | int option_index; |
---|
650 | |
---|
651 | for (nameend = nextchar; *nameend && *nameend != '='; nameend++) |
---|
652 | /* Do nothing. */ ; |
---|
653 | |
---|
654 | /* Test all long options for either exact match |
---|
655 | or abbreviated matches. */ |
---|
656 | for (p = longopts, option_index = 0; p->name; p++, option_index++) |
---|
657 | if (!strncmp (p->name, nextchar, nameend - nextchar)) |
---|
658 | { |
---|
659 | if ((unsigned int) (nameend - nextchar) |
---|
660 | == (unsigned int) strlen (p->name)) |
---|
661 | { |
---|
662 | /* Exact match found. */ |
---|
663 | pfound = p; |
---|
664 | indfound = option_index; |
---|
665 | exact = 1; |
---|
666 | break; |
---|
667 | } |
---|
668 | else if (pfound == NULL) |
---|
669 | { |
---|
670 | /* First nonexact match found. */ |
---|
671 | pfound = p; |
---|
672 | indfound = option_index; |
---|
673 | } |
---|
674 | else |
---|
675 | /* Second or later nonexact match found. */ |
---|
676 | ambig = 1; |
---|
677 | } |
---|
678 | |
---|
679 | if (ambig && !exact) |
---|
680 | { |
---|
681 | if (opterr) |
---|
682 | fprintf (stderr, _("%s: option `%s' is ambiguous\n"), |
---|
683 | argv[0], argv[optind]); |
---|
684 | nextchar += strlen (nextchar); |
---|
685 | optind++; |
---|
686 | optopt = 0; |
---|
687 | return '?'; |
---|
688 | } |
---|
689 | |
---|
690 | if (pfound != NULL) |
---|
691 | { |
---|
692 | option_index = indfound; |
---|
693 | optind++; |
---|
694 | if (*nameend) |
---|
695 | { |
---|
696 | /* Don't test has_arg with >, because some C compilers don't |
---|
697 | allow it to be used on enums. */ |
---|
698 | if (pfound->has_arg) |
---|
699 | optarg = nameend + 1; |
---|
700 | else |
---|
701 | { |
---|
702 | if (opterr) |
---|
703 | { |
---|
704 | if (argv[optind - 1][1] == '-') |
---|
705 | /* --option */ |
---|
706 | fprintf (stderr, |
---|
707 | _("%s: option `--%s' doesn't allow an argument\n"), |
---|
708 | argv[0], pfound->name); |
---|
709 | else |
---|
710 | /* +option or -option */ |
---|
711 | fprintf (stderr, |
---|
712 | _("%s: option `%c%s' doesn't allow an argument\n"), |
---|
713 | argv[0], argv[optind - 1][0], pfound->name); |
---|
714 | |
---|
715 | nextchar += strlen (nextchar); |
---|
716 | |
---|
717 | optopt = pfound->val; |
---|
718 | return '?'; |
---|
719 | } |
---|
720 | } |
---|
721 | } |
---|
722 | else if (pfound->has_arg == 1) |
---|
723 | { |
---|
724 | if (optind < argc) |
---|
725 | optarg = argv[optind++]; |
---|
726 | else |
---|
727 | { |
---|
728 | if (opterr) |
---|
729 | fprintf (stderr, |
---|
730 | _("%s: option `%s' requires an argument\n"), |
---|
731 | argv[0], argv[optind - 1]); |
---|
732 | nextchar += strlen (nextchar); |
---|
733 | optopt = pfound->val; |
---|
734 | return optstring[0] == ':' ? ':' : '?'; |
---|
735 | } |
---|
736 | } |
---|
737 | nextchar += strlen (nextchar); |
---|
738 | if (longind != NULL) |
---|
739 | *longind = option_index; |
---|
740 | if (pfound->flag) |
---|
741 | { |
---|
742 | *(pfound->flag) = pfound->val; |
---|
743 | return 0; |
---|
744 | } |
---|
745 | return pfound->val; |
---|
746 | } |
---|
747 | |
---|
748 | /* Can't find it as a long option. If this is not getopt_long_only, |
---|
749 | or the option starts with '--' or is not a valid short |
---|
750 | option, then it's an error. |
---|
751 | Otherwise interpret it as a short option. */ |
---|
752 | if (!long_only || argv[optind][1] == '-' |
---|
753 | || my_index (optstring, *nextchar) == NULL) |
---|
754 | { |
---|
755 | if (opterr) |
---|
756 | { |
---|
757 | if (argv[optind][1] == '-') |
---|
758 | /* --option */ |
---|
759 | fprintf (stderr, _("%s: unrecognized option `--%s'\n"), |
---|
760 | argv[0], nextchar); |
---|
761 | else |
---|
762 | /* +option or -option */ |
---|
763 | fprintf (stderr, _("%s: unrecognized option `%c%s'\n"), |
---|
764 | argv[0], argv[optind][0], nextchar); |
---|
765 | } |
---|
766 | nextchar = (char *) ""; |
---|
767 | optind++; |
---|
768 | optopt = 0; |
---|
769 | return '?'; |
---|
770 | } |
---|
771 | } |
---|
772 | |
---|
773 | /* Look at and handle the next short option-character. */ |
---|
774 | |
---|
775 | { |
---|
776 | char c = *nextchar++; |
---|
777 | char *temp = my_index (optstring, c); |
---|
778 | |
---|
779 | /* Increment `optind' when we start to process its last character. */ |
---|
780 | if (*nextchar == '\0') |
---|
781 | ++optind; |
---|
782 | |
---|
783 | if (temp == NULL || c == ':') |
---|
784 | { |
---|
785 | if (opterr) |
---|
786 | { |
---|
787 | if (posixly_correct) |
---|
788 | /* 1003.2 specifies the format of this message. */ |
---|
789 | fprintf (stderr, _("%s: illegal option -- %c\n"), |
---|
790 | argv[0], c); |
---|
791 | else |
---|
792 | fprintf (stderr, _("%s: invalid option -- %c\n"), |
---|
793 | argv[0], c); |
---|
794 | } |
---|
795 | optopt = c; |
---|
796 | return '?'; |
---|
797 | } |
---|
798 | /* Convenience. Treat POSIX -W foo same as long option --foo */ |
---|
799 | if (temp[0] == 'W' && temp[1] == ';') |
---|
800 | { |
---|
801 | char *nameend; |
---|
802 | const struct option *p; |
---|
803 | const struct option *pfound = NULL; |
---|
804 | int exact = 0; |
---|
805 | int ambig = 0; |
---|
806 | int indfound = 0; |
---|
807 | int option_index; |
---|
808 | |
---|
809 | /* This is an option that requires an argument. */ |
---|
810 | if (*nextchar != '\0') |
---|
811 | { |
---|
812 | optarg = nextchar; |
---|
813 | /* If we end this ARGV-element by taking the rest as an arg, |
---|
814 | we must advance to the next element now. */ |
---|
815 | optind++; |
---|
816 | } |
---|
817 | else if (optind == argc) |
---|
818 | { |
---|
819 | if (opterr) |
---|
820 | { |
---|
821 | /* 1003.2 specifies the format of this message. */ |
---|
822 | fprintf (stderr, _("%s: option requires an argument -- %c\n"), |
---|
823 | argv[0], c); |
---|
824 | } |
---|
825 | optopt = c; |
---|
826 | if (optstring[0] == ':') |
---|
827 | c = ':'; |
---|
828 | else |
---|
829 | c = '?'; |
---|
830 | return c; |
---|
831 | } |
---|
832 | else |
---|
833 | /* We already incremented `optind' once; |
---|
834 | increment it again when taking next ARGV-elt as argument. */ |
---|
835 | optarg = argv[optind++]; |
---|
836 | |
---|
837 | /* optarg is now the argument, see if it's in the |
---|
838 | table of longopts. */ |
---|
839 | |
---|
840 | for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++) |
---|
841 | /* Do nothing. */ ; |
---|
842 | |
---|
843 | /* Test all long options for either exact match |
---|
844 | or abbreviated matches. */ |
---|
845 | for (p = longopts, option_index = 0; p->name; p++, option_index++) |
---|
846 | if (!strncmp (p->name, nextchar, nameend - nextchar)) |
---|
847 | { |
---|
848 | if ((unsigned int) (nameend - nextchar) == strlen (p->name)) |
---|
849 | { |
---|
850 | /* Exact match found. */ |
---|
851 | pfound = p; |
---|
852 | indfound = option_index; |
---|
853 | exact = 1; |
---|
854 | break; |
---|
855 | } |
---|
856 | else if (pfound == NULL) |
---|
857 | { |
---|
858 | /* First nonexact match found. */ |
---|
859 | pfound = p; |
---|
860 | indfound = option_index; |
---|
861 | } |
---|
862 | else |
---|
863 | /* Second or later nonexact match found. */ |
---|
864 | ambig = 1; |
---|
865 | } |
---|
866 | if (ambig && !exact) |
---|
867 | { |
---|
868 | if (opterr) |
---|
869 | fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"), |
---|
870 | argv[0], argv[optind]); |
---|
871 | nextchar += strlen (nextchar); |
---|
872 | optind++; |
---|
873 | return '?'; |
---|
874 | } |
---|
875 | if (pfound != NULL) |
---|
876 | { |
---|
877 | option_index = indfound; |
---|
878 | if (*nameend) |
---|
879 | { |
---|
880 | /* Don't test has_arg with >, because some C compilers don't |
---|
881 | allow it to be used on enums. */ |
---|
882 | if (pfound->has_arg) |
---|
883 | optarg = nameend + 1; |
---|
884 | else |
---|
885 | { |
---|
886 | if (opterr) |
---|
887 | fprintf (stderr, _("\ |
---|
888 | %s: option `-W %s' doesn't allow an argument\n"), |
---|
889 | argv[0], pfound->name); |
---|
890 | |
---|
891 | nextchar += strlen (nextchar); |
---|
892 | return '?'; |
---|
893 | } |
---|
894 | } |
---|
895 | else if (pfound->has_arg == 1) |
---|
896 | { |
---|
897 | if (optind < argc) |
---|
898 | optarg = argv[optind++]; |
---|
899 | else |
---|
900 | { |
---|
901 | if (opterr) |
---|
902 | fprintf (stderr, |
---|
903 | _("%s: option `%s' requires an argument\n"), |
---|
904 | argv[0], argv[optind - 1]); |
---|
905 | nextchar += strlen (nextchar); |
---|
906 | return optstring[0] == ':' ? ':' : '?'; |
---|
907 | } |
---|
908 | } |
---|
909 | nextchar += strlen (nextchar); |
---|
910 | if (longind != NULL) |
---|
911 | *longind = option_index; |
---|
912 | if (pfound->flag) |
---|
913 | { |
---|
914 | *(pfound->flag) = pfound->val; |
---|
915 | return 0; |
---|
916 | } |
---|
917 | return pfound->val; |
---|
918 | } |
---|
919 | nextchar = NULL; |
---|
920 | return 'W'; /* Let the application handle it. */ |
---|
921 | } |
---|
922 | if (temp[1] == ':') |
---|
923 | { |
---|
924 | if (temp[2] == ':') |
---|
925 | { |
---|
926 | /* This is an option that accepts an argument optionally. */ |
---|
927 | if (*nextchar != '\0') |
---|
928 | { |
---|
929 | optarg = nextchar; |
---|
930 | optind++; |
---|
931 | } |
---|
932 | else |
---|
933 | optarg = NULL; |
---|
934 | nextchar = NULL; |
---|
935 | } |
---|
936 | else |
---|
937 | { |
---|
938 | /* This is an option that requires an argument. */ |
---|
939 | if (*nextchar != '\0') |
---|
940 | { |
---|
941 | optarg = nextchar; |
---|
942 | /* If we end this ARGV-element by taking the rest as an arg, |
---|
943 | we must advance to the next element now. */ |
---|
944 | optind++; |
---|
945 | } |
---|
946 | else if (optind == argc) |
---|
947 | { |
---|
948 | if (opterr) |
---|
949 | { |
---|
950 | /* 1003.2 specifies the format of this message. */ |
---|
951 | fprintf (stderr, |
---|
952 | _("%s: option requires an argument -- %c\n"), |
---|
953 | argv[0], c); |
---|
954 | } |
---|
955 | optopt = c; |
---|
956 | if (optstring[0] == ':') |
---|
957 | c = ':'; |
---|
958 | else |
---|
959 | c = '?'; |
---|
960 | } |
---|
961 | else |
---|
962 | /* We already incremented `optind' once; |
---|
963 | increment it again when taking next ARGV-elt as argument. */ |
---|
964 | optarg = argv[optind++]; |
---|
965 | nextchar = NULL; |
---|
966 | } |
---|
967 | } |
---|
968 | return c; |
---|
969 | } |
---|
970 | } |
---|
971 | |
---|
972 | int |
---|
973 | getopt (argc, argv, optstring) |
---|
974 | int argc; |
---|
975 | char *const *argv; |
---|
976 | const char *optstring; |
---|
977 | { |
---|
978 | return _getopt_internal (argc, argv, optstring, |
---|
979 | (const struct option *) 0, |
---|
980 | (int *) 0, |
---|
981 | 0); |
---|
982 | } |
---|
983 | |
---|
984 | #endif /* Not ELIDE_CODE. */ |
---|
985 | |
---|
986 | #ifdef TEST |
---|
987 | |
---|
988 | /* Compile with -DTEST to make an executable for use in testing |
---|
989 | the above definition of `getopt'. */ |
---|
990 | |
---|
991 | int |
---|
992 | main (argc, argv) |
---|
993 | int argc; |
---|
994 | char **argv; |
---|
995 | { |
---|
996 | int c; |
---|
997 | int digit_optind = 0; |
---|
998 | |
---|
999 | while (1) |
---|
1000 | { |
---|
1001 | int this_option_optind = optind ? optind : 1; |
---|
1002 | |
---|
1003 | c = getopt (argc, argv, "abc:d:0123456789"); |
---|
1004 | if (c == -1) |
---|
1005 | break; |
---|
1006 | |
---|
1007 | switch (c) |
---|
1008 | { |
---|
1009 | case '0': |
---|
1010 | case '1': |
---|
1011 | case '2': |
---|
1012 | case '3': |
---|
1013 | case '4': |
---|
1014 | case '5': |
---|
1015 | case '6': |
---|
1016 | case '7': |
---|
1017 | case '8': |
---|
1018 | case '9': |
---|
1019 | if (digit_optind != 0 && digit_optind != this_option_optind) |
---|
1020 | printf ("digits occur in two different argv-elements.\n"); |
---|
1021 | digit_optind = this_option_optind; |
---|
1022 | printf ("option %c\n", c); |
---|
1023 | break; |
---|
1024 | |
---|
1025 | case 'a': |
---|
1026 | printf ("option a\n"); |
---|
1027 | break; |
---|
1028 | |
---|
1029 | case 'b': |
---|
1030 | printf ("option b\n"); |
---|
1031 | break; |
---|
1032 | |
---|
1033 | case 'c': |
---|
1034 | printf ("option c with value `%s'\n", optarg); |
---|
1035 | break; |
---|
1036 | |
---|
1037 | case '?': |
---|
1038 | break; |
---|
1039 | |
---|
1040 | default: |
---|
1041 | printf ("?? getopt returned character code 0%o ??\n", c); |
---|
1042 | } |
---|
1043 | } |
---|
1044 | |
---|
1045 | if (optind < argc) |
---|
1046 | { |
---|
1047 | printf ("non-option ARGV-elements: "); |
---|
1048 | while (optind < argc) |
---|
1049 | printf ("%s ", argv[optind++]); |
---|
1050 | printf ("\n"); |
---|
1051 | } |
---|
1052 | |
---|
1053 | exit (0); |
---|
1054 | } |
---|
1055 | |
---|
1056 | #endif /* TEST */ |
---|