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author | Christian Grothoff <christian@grothoff.org> | 2009-05-29 00:46:26 +0000 |
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committer | Christian Grothoff <christian@grothoff.org> | 2009-05-29 00:46:26 +0000 |
commit | 0a217a8df1657b4334b55b0e4a6c7837a8dbcfd9 (patch) | |
tree | 6b552f40eb089db96409a312a98d9b12bd669102 /src/util/getopt.c | |
download | gnunet-0a217a8df1657b4334b55b0e4a6c7837a8dbcfd9.tar.gz gnunet-0a217a8df1657b4334b55b0e4a6c7837a8dbcfd9.zip |
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Diffstat (limited to 'src/util/getopt.c')
-rw-r--r-- | src/util/getopt.c | 1077 |
1 files changed, 1077 insertions, 0 deletions
diff --git a/src/util/getopt.c b/src/util/getopt.c new file mode 100644 index 000000000..e069e76f7 --- /dev/null +++ b/src/util/getopt.c | |||
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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 | NOTE: The canonical source of this file is maintained with the GNU C Library. | ||
10 | Bugs can be reported to bug-glibc@prep.ai.mit.edu. | ||
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 | |||
28 | This code was heavily modified for GNUnet. | ||
29 | Copyright (C) 2006 Christian Grothoff | ||
30 | */ | ||
31 | |||
32 | /** | ||
33 | * @file util/getopt.c | ||
34 | * @brief GNU style option parsing | ||
35 | * | ||
36 | * TODO: get rid of statics (make reentrant) and | ||
37 | * replace main GNU getopt parser with one that | ||
38 | * actually fits our API. | ||
39 | */ | ||
40 | |||
41 | #include "platform.h" | ||
42 | #include "gnunet_common.h" | ||
43 | #include "gnunet_getopt_lib.h" | ||
44 | |||
45 | #ifdef VMS | ||
46 | # include <unixlib.h> | ||
47 | # if HAVE_STRING_H - 0 | ||
48 | # include <string.h> | ||
49 | # endif | ||
50 | #endif | ||
51 | |||
52 | #if defined (WIN32) && !defined (__CYGWIN32__) | ||
53 | /* It's not Unix, really. See? Capital letters. */ | ||
54 | # include <windows.h> | ||
55 | # define getpid() GetCurrentProcessId() | ||
56 | #endif | ||
57 | |||
58 | #ifndef _ | ||
59 | /* This is for other GNU distributions with internationalized messages. | ||
60 | When compiling libc, the _ macro is predefined. */ | ||
61 | # ifdef HAVE_LIBINTL_H | ||
62 | # include <libintl.h> | ||
63 | # define _(msgid) gettext (msgid) | ||
64 | # else | ||
65 | # define _(msgid) (msgid) | ||
66 | # endif | ||
67 | #endif | ||
68 | |||
69 | /* Describe the long-named options requested by the application. | ||
70 | The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector | ||
71 | of `struct GNoption' terminated by an element containing a name which is | ||
72 | zero. | ||
73 | |||
74 | The field `has_arg' is: | ||
75 | no_argument (or 0) if the option does not take an argument, | ||
76 | required_argument (or 1) if the option requires an argument, | ||
77 | optional_argument (or 2) if the option takes an optional argument. | ||
78 | |||
79 | If the field `flag' is not NULL, it points to a variable that is set | ||
80 | to the value given in the field `val' when the option is found, but | ||
81 | left unchanged if the option is not found. | ||
82 | |||
83 | To have a long-named option do something other than set an `int' to | ||
84 | a compiled-in constant, such as set a value from `GNoptarg', set the | ||
85 | option's `flag' field to zero and its `val' field to a nonzero | ||
86 | value (the equivalent single-letter option character, if there is | ||
87 | one). For long options that have a zero `flag' field, `getopt' | ||
88 | returns the contents of the `val' field. */ | ||
89 | |||
90 | struct GNoption | ||
91 | { | ||
92 | const char *name; | ||
93 | /* has_arg can't be an enum because some compilers complain about | ||
94 | type mismatches in all the code that assumes it is an int. */ | ||
95 | int has_arg; | ||
96 | int *flag; | ||
97 | int val; | ||
98 | }; | ||
99 | |||
100 | |||
101 | /* This version of `getopt' appears to the caller like standard Unix `getopt' | ||
102 | but it behaves differently for the user, since it allows the user | ||
103 | to intersperse the options with the other arguments. | ||
104 | |||
105 | As `getopt' works, it permutes the elements of ARGV so that, | ||
106 | when it is done, all the options precede everything else. Thus | ||
107 | all application programs are extended to handle flexible argument order. | ||
108 | |||
109 | Setting the environment variable POSIXLY_CORRECT disables permutation. | ||
110 | Then the behavior is completely standard. | ||
111 | |||
112 | GNU application programs can use a third alternative mode in which | ||
113 | they can distinguish the relative order of options and other arguments. */ | ||
114 | |||
115 | /* For communication from `getopt' to the caller. | ||
116 | When `getopt' finds an option that takes an argument, | ||
117 | the argument value is returned here. | ||
118 | Also, when `ordering' is RETURN_IN_ORDER, | ||
119 | each non-option ARGV-element is returned here. */ | ||
120 | |||
121 | static char *GNoptarg = NULL; | ||
122 | |||
123 | /* Index in ARGV of the next element to be scanned. | ||
124 | This is used for communication to and from the caller | ||
125 | and for communication between successive calls to `getopt'. | ||
126 | |||
127 | On entry to `getopt', zero means this is the first call; initialize. | ||
128 | |||
129 | When `getopt' returns -1, this is the index of the first of the | ||
130 | non-option elements that the caller should itself scan. | ||
131 | |||
132 | Otherwise, `GNoptind' communicates from one call to the next | ||
133 | how much of ARGV has been scanned so far. */ | ||
134 | |||
135 | /* 1003.2 says this must be 1 before any call. */ | ||
136 | static int GNoptind = 1; | ||
137 | |||
138 | /* Formerly, initialization of getopt depended on GNoptind==0, which | ||
139 | causes problems with re-calling getopt as programs generally don't | ||
140 | know that. */ | ||
141 | |||
142 | static int __getopt_initialized = 0; | ||
143 | |||
144 | /* The next char to be scanned in the option-element | ||
145 | in which the last option character we returned was found. | ||
146 | This allows us to pick up the scan where we left off. | ||
147 | |||
148 | If this is zero, or a null string, it means resume the scan | ||
149 | by advancing to the next ARGV-element. */ | ||
150 | |||
151 | static char *nextchar; | ||
152 | |||
153 | /* Callers store zero here to inhibit the error message | ||
154 | for unrecognized options. */ | ||
155 | |||
156 | static int GNopterr = 1; | ||
157 | |||
158 | /* Set to an option character which was unrecognized. | ||
159 | This must be initialized on some systems to avoid linking in the | ||
160 | system's own getopt implementation. */ | ||
161 | |||
162 | static int GNoptopt = '?'; | ||
163 | |||
164 | /* Describe how to deal with options that follow non-option ARGV-elements. | ||
165 | |||
166 | If the caller did not specify anything, | ||
167 | the default is REQUIRE_ORDER if the environment variable | ||
168 | POSIXLY_CORRECT is defined, PERMUTE otherwise. | ||
169 | |||
170 | REQUIRE_ORDER means don't recognize them as options; | ||
171 | stop option processing when the first non-option is seen. | ||
172 | This is what Unix does. | ||
173 | This mode of operation is selected by either setting the environment | ||
174 | variable POSIXLY_CORRECT, or using `+' as the first character | ||
175 | of the list of option characters. | ||
176 | |||
177 | PERMUTE is the default. We GNUNET_CRYPTO_random_permute the contents of ARGV as we scan, | ||
178 | so that eventually all the non-options are at the end. This allows options | ||
179 | to be given in any order, even with programs that were not written to | ||
180 | expect this. | ||
181 | |||
182 | RETURN_IN_ORDER is an option available to programs that were written | ||
183 | to expect GNoptions and other ARGV-elements in any order and that care about | ||
184 | the ordering of the two. We describe each non-option ARGV-element | ||
185 | as if it were the argument of an option with character code 1. | ||
186 | Using `-' as the first character of the list of option characters | ||
187 | selects this mode of operation. | ||
188 | |||
189 | The special argument `--' forces an end of option-scanning regardless | ||
190 | of the value of `ordering'. In the case of RETURN_IN_ORDER, only | ||
191 | `--' can cause `getopt' to return -1 with `GNoptind' != ARGC. */ | ||
192 | |||
193 | static enum | ||
194 | { | ||
195 | REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER | ||
196 | } ordering; | ||
197 | |||
198 | /* Value of POSIXLY_CORRECT environment variable. */ | ||
199 | static char *posixly_correct; | ||
200 | |||
201 | #ifdef __GNU_LIBRARY__ | ||
202 | /* We want to avoid inclusion of string.h with non-GNU libraries | ||
203 | because there are many ways it can cause trouble. | ||
204 | On some systems, it contains special magic macros that don't work | ||
205 | in GCC. */ | ||
206 | #include <string.h> | ||
207 | #define my_index strchr | ||
208 | #else | ||
209 | |||
210 | /* Avoid depending on library functions or files | ||
211 | whose names are inconsistent. */ | ||
212 | |||
213 | char *getenv (); | ||
214 | |||
215 | static char * | ||
216 | my_index (str, chr) | ||
217 | const char *str; | ||
218 | int chr; | ||
219 | { | ||
220 | while (*str) | ||
221 | { | ||
222 | if (*str == chr) | ||
223 | return (char *) str; | ||
224 | str++; | ||
225 | } | ||
226 | return 0; | ||
227 | } | ||
228 | |||
229 | /* If using GCC, we can safely declare strlen this way. | ||
230 | If not using GCC, it is ok not to declare it. */ | ||
231 | #ifdef __GNUC__ | ||
232 | /* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h. | ||
233 | That was relevant to code that was here before. */ | ||
234 | #if !defined (__STDC__) || !__STDC__ | ||
235 | /* gcc with -traditional declares the built-in strlen to return int, | ||
236 | and has done so at least since version 2.4.5. -- rms. */ | ||
237 | extern int strlen (const char *); | ||
238 | #endif /* not __STDC__ */ | ||
239 | #endif /* __GNUC__ */ | ||
240 | |||
241 | #endif /* not __GNU_LIBRARY__ */ | ||
242 | |||
243 | /* Handle permutation of arguments. */ | ||
244 | |||
245 | /* Describe the part of ARGV that contains non-options that have | ||
246 | been skipped. `first_nonopt' is the index in ARGV of the first of them; | ||
247 | `last_nonopt' is the index after the last of them. */ | ||
248 | |||
249 | static int first_nonopt; | ||
250 | static int last_nonopt; | ||
251 | |||
252 | #ifdef _LIBC | ||
253 | /* Bash 2.0 gives us an environment variable containing flags | ||
254 | indicating ARGV elements that should not be considered arguments. */ | ||
255 | |||
256 | /* Defined in getopt_init.c */ | ||
257 | extern char *__getopt_nonoption_flags; | ||
258 | |||
259 | static int nonoption_flags_max_len; | ||
260 | static int nonoption_flags_len; | ||
261 | |||
262 | static int original_argc; | ||
263 | static char *const *original_argv; | ||
264 | |||
265 | extern pid_t __libc_pid; | ||
266 | |||
267 | /* Make sure the environment variable bash 2.0 puts in the environment | ||
268 | is valid for the getopt call we must make sure that the ARGV passed | ||
269 | to getopt is that one passed to the process. */ | ||
270 | static void | ||
271 | __attribute__ ((unused)) store_args_and_env (int argc, char *const *argv) | ||
272 | { | ||
273 | /* XXX This is no good solution. We should rather copy the args so | ||
274 | that we can compare them later. But we must not use malloc(3). */ | ||
275 | original_argc = argc; | ||
276 | original_argv = argv; | ||
277 | } | ||
278 | |||
279 | text_set_element (__libc_subinit, store_args_and_env); | ||
280 | |||
281 | # define SWAP_FLAGS(ch1, ch2) \ | ||
282 | if (nonoption_flags_len > 0) \ | ||
283 | { \ | ||
284 | char __tmp = __getopt_nonoption_flags[ch1]; \ | ||
285 | __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \ | ||
286 | __getopt_nonoption_flags[ch2] = __tmp; \ | ||
287 | } | ||
288 | #else /* !_LIBC */ | ||
289 | # define SWAP_FLAGS(ch1, ch2) | ||
290 | #endif /* _LIBC */ | ||
291 | |||
292 | /* Exchange two adjacent subsequences of ARGV. | ||
293 | One subsequence is elements [first_nonopt,last_nonopt) | ||
294 | which contains all the non-options that have been skipped so far. | ||
295 | The other is elements [last_nonopt,GNoptind), which contains all | ||
296 | the options processed since those non-options were skipped. | ||
297 | |||
298 | `first_nonopt' and `last_nonopt' are relocated so that they describe | ||
299 | the new indices of the non-options in ARGV after they are moved. */ | ||
300 | |||
301 | #if defined (__STDC__) && __STDC__ | ||
302 | static void exchange (char **); | ||
303 | #endif | ||
304 | |||
305 | static void | ||
306 | exchange (argv) | ||
307 | char **argv; | ||
308 | { | ||
309 | int bottom = first_nonopt; | ||
310 | int middle = last_nonopt; | ||
311 | int top = GNoptind; | ||
312 | char *tem; | ||
313 | |||
314 | /* Exchange the shorter segment with the far end of the longer segment. | ||
315 | That puts the shorter segment into the right place. | ||
316 | It leaves the longer segment in the right place overall, | ||
317 | but it consists of two parts that need to be swapped next. */ | ||
318 | |||
319 | #ifdef _LIBC | ||
320 | /* First make sure the handling of the `__getopt_nonoption_flags' | ||
321 | string can work normally. Our top argument must be in the range | ||
322 | of the string. */ | ||
323 | if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len) | ||
324 | { | ||
325 | /* We must extend the array. The user plays games with us and | ||
326 | presents new arguments. */ | ||
327 | char *new_str = malloc (top + 1); | ||
328 | if (new_str == NULL) | ||
329 | nonoption_flags_len = nonoption_flags_max_len = 0; | ||
330 | else | ||
331 | { | ||
332 | memcpy (new_str, __getopt_nonoption_flags, nonoption_flags_max_len); | ||
333 | memset (&new_str[nonoption_flags_max_len], '\0', | ||
334 | top + 1 - nonoption_flags_max_len); | ||
335 | nonoption_flags_max_len = top + 1; | ||
336 | __getopt_nonoption_flags = new_str; | ||
337 | } | ||
338 | } | ||
339 | #endif | ||
340 | |||
341 | while (top > middle && middle > bottom) | ||
342 | { | ||
343 | if (top - middle > middle - bottom) | ||
344 | { | ||
345 | /* Bottom segment is the short one. */ | ||
346 | int len = middle - bottom; | ||
347 | register int i; | ||
348 | |||
349 | /* Swap it with the top part of the top segment. */ | ||
350 | for (i = 0; i < len; i++) | ||
351 | { | ||
352 | tem = argv[bottom + i]; | ||
353 | argv[bottom + i] = argv[top - (middle - bottom) + i]; | ||
354 | argv[top - (middle - bottom) + i] = tem; | ||
355 | SWAP_FLAGS (bottom + i, top - (middle - bottom) + i); | ||
356 | } | ||
357 | /* Exclude the moved bottom segment from further swapping. */ | ||
358 | top -= len; | ||
359 | } | ||
360 | else | ||
361 | { | ||
362 | /* Top segment is the short one. */ | ||
363 | int len = top - middle; | ||
364 | register int i; | ||
365 | |||
366 | /* Swap it with the bottom part of the bottom segment. */ | ||
367 | for (i = 0; i < len; i++) | ||
368 | { | ||
369 | tem = argv[bottom + i]; | ||
370 | argv[bottom + i] = argv[middle + i]; | ||
371 | argv[middle + i] = tem; | ||
372 | SWAP_FLAGS (bottom + i, middle + i); | ||
373 | } | ||
374 | /* Exclude the moved top segment from further swapping. */ | ||
375 | bottom += len; | ||
376 | } | ||
377 | } | ||
378 | |||
379 | /* Update records for the slots the non-options now occupy. */ | ||
380 | |||
381 | first_nonopt += (GNoptind - last_nonopt); | ||
382 | last_nonopt = GNoptind; | ||
383 | } | ||
384 | |||
385 | /* Initialize the internal data when the first call is made. */ | ||
386 | |||
387 | #if defined (__STDC__) && __STDC__ | ||
388 | static const char *_getopt_initialize (int, char *const *, const char *); | ||
389 | #endif | ||
390 | static const char * | ||
391 | _getopt_initialize (argc, argv, optstring) | ||
392 | int argc; | ||
393 | char *const *argv; | ||
394 | const char *optstring; | ||
395 | { | ||
396 | /* Start processing options with ARGV-element 1 (since ARGV-element 0 | ||
397 | is the program name); the sequence of previously skipped | ||
398 | non-option ARGV-elements is empty. */ | ||
399 | |||
400 | first_nonopt = last_nonopt = GNoptind; | ||
401 | |||
402 | nextchar = NULL; | ||
403 | |||
404 | posixly_correct = getenv ("POSIXLY_CORRECT"); | ||
405 | |||
406 | /* Determine how to handle the ordering of options and nonoptions. */ | ||
407 | |||
408 | if (optstring[0] == '-') | ||
409 | { | ||
410 | ordering = RETURN_IN_ORDER; | ||
411 | ++optstring; | ||
412 | } | ||
413 | else if (optstring[0] == '+') | ||
414 | { | ||
415 | ordering = REQUIRE_ORDER; | ||
416 | ++optstring; | ||
417 | } | ||
418 | else if (posixly_correct != NULL) | ||
419 | ordering = REQUIRE_ORDER; | ||
420 | else | ||
421 | ordering = PERMUTE; | ||
422 | |||
423 | #ifdef _LIBC | ||
424 | if (posixly_correct == NULL | ||
425 | && argc == original_argc && argv == original_argv) | ||
426 | { | ||
427 | if (nonoption_flags_max_len == 0) | ||
428 | { | ||
429 | if (__getopt_nonoption_flags == NULL | ||
430 | || __getopt_nonoption_flags[0] == '\0') | ||
431 | nonoption_flags_max_len = -1; | ||
432 | else | ||
433 | { | ||
434 | const char *orig_str = __getopt_nonoption_flags; | ||
435 | int len = nonoption_flags_max_len = strlen (orig_str); | ||
436 | if (nonoption_flags_max_len < argc) | ||
437 | nonoption_flags_max_len = argc; | ||
438 | __getopt_nonoption_flags = | ||
439 | (char *) malloc (nonoption_flags_max_len); | ||
440 | if (__getopt_nonoption_flags == NULL) | ||
441 | nonoption_flags_max_len = -1; | ||
442 | else | ||
443 | { | ||
444 | memcpy (__getopt_nonoption_flags, orig_str, len); | ||
445 | memset (&__getopt_nonoption_flags[len], '\0', | ||
446 | nonoption_flags_max_len - len); | ||
447 | } | ||
448 | } | ||
449 | } | ||
450 | nonoption_flags_len = nonoption_flags_max_len; | ||
451 | } | ||
452 | else | ||
453 | nonoption_flags_len = 0; | ||
454 | #endif | ||
455 | |||
456 | return optstring; | ||
457 | } | ||
458 | |||
459 | /* Scan elements of ARGV (whose length is ARGC) for option characters | ||
460 | given in OPTSTRING. | ||
461 | |||
462 | If an element of ARGV starts with '-', and is not exactly "-" or "--", | ||
463 | then it is an option element. The characters of this element | ||
464 | (aside from the initial '-') are option characters. If `getopt' | ||
465 | is called repeatedly, it returns successively each of the option characters | ||
466 | from each of the option elements. | ||
467 | |||
468 | If `getopt' finds another option character, it returns that character, | ||
469 | updating `GNoptind' and `nextchar' so that the next call to `getopt' can | ||
470 | resume the scan with the following option character or ARGV-element. | ||
471 | |||
472 | If there are no more option characters, `getopt' returns -1. | ||
473 | Then `GNoptind' is the index in ARGV of the first ARGV-element | ||
474 | that is not an option. (The ARGV-elements have been permuted | ||
475 | so that those that are not options now come last.) | ||
476 | |||
477 | OPTSTRING is a string containing the legitimate option characters. | ||
478 | If an option character is seen that is not listed in OPTSTRING, | ||
479 | return '?' after printing an error message. If you set `GNopterr' to | ||
480 | zero, the error message is suppressed but we still return '?'. | ||
481 | |||
482 | If a char in OPTSTRING is followed by a colon, that means it wants an arg, | ||
483 | so the following text in the same ARGV-element, or the text of the following | ||
484 | ARGV-element, is returned in `GNoptarg'. Two colons mean an option that | ||
485 | wants an optional arg; if there is text in the current ARGV-element, | ||
486 | it is returned in `GNoptarg', otherwise `GNoptarg' is set to zero. | ||
487 | |||
488 | If OPTSTRING starts with `-' or `+', it requests different methods of | ||
489 | handling the non-option ARGV-elements. | ||
490 | See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above. | ||
491 | |||
492 | Long-named options begin with `--' instead of `-'. | ||
493 | Their names may be abbreviated as long as the abbreviation is unique | ||
494 | or is an exact match for some defined option. If they have an | ||
495 | argument, it follows the option name in the same ARGV-element, separated | ||
496 | from the option name by a `=', or else the in next ARGV-element. | ||
497 | When `getopt' finds a long-named option, it returns 0 if that option's | ||
498 | `flag' field is nonzero, the value of the option's `val' field | ||
499 | if the `flag' field is zero. | ||
500 | |||
501 | The elements of ARGV aren't really const, because we GNUNET_CRYPTO_random_permute them. | ||
502 | But we pretend they're const in the prototype to be compatible | ||
503 | with other systems. | ||
504 | |||
505 | LONGOPTS is a vector of `struct GNoption' terminated by an | ||
506 | element containing a name which is zero. | ||
507 | |||
508 | LONGIND returns the index in LONGOPT of the long-named option found. | ||
509 | It is only valid when a long-named option has been found by the most | ||
510 | recent call. | ||
511 | |||
512 | If LONG_ONLY is nonzero, '-' as well as '--' can introduce | ||
513 | long-named options. */ | ||
514 | |||
515 | static int | ||
516 | GN_getopt_internal (argc, argv, optstring, longopts, longind, long_only) | ||
517 | int argc; | ||
518 | char *const *argv; | ||
519 | const char *optstring; | ||
520 | const struct GNoption *longopts; | ||
521 | int *longind; | ||
522 | int long_only; | ||
523 | { | ||
524 | GNoptarg = NULL; | ||
525 | |||
526 | if (GNoptind == 0 || !__getopt_initialized) | ||
527 | { | ||
528 | if (GNoptind == 0) | ||
529 | GNoptind = 1; /* Don't scan ARGV[0], the program name. */ | ||
530 | optstring = _getopt_initialize (argc, argv, optstring); | ||
531 | __getopt_initialized = 1; | ||
532 | } | ||
533 | |||
534 | /* Test whether ARGV[GNoptind] points to a non-option argument. | ||
535 | Either it does not have option syntax, or there is an environment flag | ||
536 | from the shell indicating it is not an option. The later information | ||
537 | is only used when the used in the GNU libc. */ | ||
538 | #ifdef _LIBC | ||
539 | #define NONOPTION_P (argv[GNoptind][0] != '-' || argv[GNoptind][1] == '\0' \ | ||
540 | || (GNoptind < nonoption_flags_len \ | ||
541 | && __getopt_nonoption_flags[GNoptind] == '1')) | ||
542 | #else | ||
543 | #define NONOPTION_P (argv[GNoptind][0] != '-' || argv[GNoptind][1] == '\0') | ||
544 | #endif | ||
545 | |||
546 | if (nextchar == NULL || *nextchar == '\0') | ||
547 | { | ||
548 | /* Advance to the next ARGV-element. */ | ||
549 | |||
550 | /* Give FIRST_NONOPT & LAST_NONOPT rational values if GNoptind has been | ||
551 | moved back by the user (who may also have changed the arguments). */ | ||
552 | if (last_nonopt > GNoptind) | ||
553 | last_nonopt = GNoptind; | ||
554 | if (first_nonopt > GNoptind) | ||
555 | first_nonopt = GNoptind; | ||
556 | |||
557 | if (ordering == PERMUTE) | ||
558 | { | ||
559 | /* If we have just processed some options following some non-options, | ||
560 | exchange them so that the options come first. */ | ||
561 | |||
562 | if (first_nonopt != last_nonopt && last_nonopt != GNoptind) | ||
563 | exchange ((char **) argv); | ||
564 | else if (last_nonopt != GNoptind) | ||
565 | first_nonopt = GNoptind; | ||
566 | |||
567 | /* Skip any additional non-options | ||
568 | and extend the range of non-options previously skipped. */ | ||
569 | |||
570 | while (GNoptind < argc && NONOPTION_P) | ||
571 | GNoptind++; | ||
572 | last_nonopt = GNoptind; | ||
573 | } | ||
574 | |||
575 | /* The special ARGV-element `--' means premature end of options. | ||
576 | Skip it like a null option, | ||
577 | then exchange with previous non-options as if it were an option, | ||
578 | then skip everything else like a non-option. */ | ||
579 | if (GNoptind != argc && !strcmp (argv[GNoptind], "--")) | ||
580 | { | ||
581 | GNoptind++; | ||
582 | |||
583 | if (first_nonopt != last_nonopt && last_nonopt != GNoptind) | ||
584 | exchange ((char **) argv); | ||
585 | else if (first_nonopt == last_nonopt) | ||
586 | first_nonopt = GNoptind; | ||
587 | last_nonopt = argc; | ||
588 | |||
589 | GNoptind = 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 (GNoptind == 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 | GNoptind = 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 | GNoptarg = argv[GNoptind++]; | ||
612 | return 1; | ||
613 | } | ||
614 | |||
615 | /* We have found another option-ARGV-element. | ||
616 | Skip the initial punctuation. */ | ||
617 | |||
618 | nextchar = (argv[GNoptind] + 1 | ||
619 | + (longopts != NULL && argv[GNoptind][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[GNoptind][1] == '-' | ||
639 | || (long_only | ||
640 | && (argv[GNoptind][2] | ||
641 | || !my_index (optstring, argv[GNoptind][1]))))) | ||
642 | { | ||
643 | char *nameend; | ||
644 | const struct GNoption *p; | ||
645 | const struct GNoption *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 (GNopterr) | ||
682 | fprintf (stderr, _("%s: option `%s' is ambiguous\n"), | ||
683 | argv[0], argv[GNoptind]); | ||
684 | nextchar += strlen (nextchar); | ||
685 | GNoptind++; | ||
686 | GNoptopt = 0; | ||
687 | return '?'; | ||
688 | } | ||
689 | |||
690 | if (pfound != NULL) | ||
691 | { | ||
692 | option_index = indfound; | ||
693 | GNoptind++; | ||
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 | GNoptarg = nameend + 1; | ||
700 | else | ||
701 | { | ||
702 | if (GNopterr) | ||
703 | { | ||
704 | if (argv[GNoptind - 1][1] == '-') | ||
705 | /* --option */ | ||
706 | fprintf (stderr, | ||
707 | _ | ||
708 | ("%s: option `--%s' does not allow an argument\n"), | ||
709 | argv[0], pfound->name); | ||
710 | else | ||
711 | /* +option or -option */ | ||
712 | fprintf (stderr, | ||
713 | _ | ||
714 | ("%s: option `%c%s' does not allow an argument\n"), | ||
715 | argv[0], argv[GNoptind - 1][0], | ||
716 | pfound->name); | ||
717 | } | ||
718 | nextchar += strlen (nextchar); | ||
719 | |||
720 | GNoptopt = pfound->val; | ||
721 | return '?'; | ||
722 | } | ||
723 | } | ||
724 | else if (pfound->has_arg == 1) | ||
725 | { | ||
726 | if (GNoptind < argc) | ||
727 | { | ||
728 | GNoptarg = argv[GNoptind++]; | ||
729 | } | ||
730 | else | ||
731 | { | ||
732 | if (GNopterr) | ||
733 | { | ||
734 | fprintf (stderr, | ||
735 | _("%s: option `%s' requires an argument\n"), | ||
736 | argv[0], argv[GNoptind - 1]); | ||
737 | } | ||
738 | nextchar += strlen (nextchar); | ||
739 | GNoptopt = pfound->val; | ||
740 | return (optstring[0] == ':') ? ':' : '?'; | ||
741 | } | ||
742 | } | ||
743 | nextchar += strlen (nextchar); | ||
744 | if (longind != NULL) | ||
745 | *longind = option_index; | ||
746 | if (pfound->flag) | ||
747 | { | ||
748 | *(pfound->flag) = pfound->val; | ||
749 | return 0; | ||
750 | } | ||
751 | return pfound->val; | ||
752 | } | ||
753 | |||
754 | /* Can't find it as a long option. If this is not getopt_long_only, | ||
755 | or the option starts with '--' or is not a valid short | ||
756 | option, then it's an error. | ||
757 | Otherwise interpret it as a short option. */ | ||
758 | if (!long_only || argv[GNoptind][1] == '-' | ||
759 | || my_index (optstring, *nextchar) == NULL) | ||
760 | { | ||
761 | if (GNopterr) | ||
762 | { | ||
763 | if (argv[GNoptind][1] == '-') | ||
764 | /* --option */ | ||
765 | fprintf (stderr, _("%s: unrecognized option `--%s'\n"), | ||
766 | argv[0], nextchar); | ||
767 | else | ||
768 | /* +option or -option */ | ||
769 | fprintf (stderr, _("%s: unrecognized option `%c%s'\n"), | ||
770 | argv[0], argv[GNoptind][0], nextchar); | ||
771 | } | ||
772 | nextchar = (char *) ""; | ||
773 | GNoptind++; | ||
774 | GNoptopt = 0; | ||
775 | return '?'; | ||
776 | } | ||
777 | } | ||
778 | |||
779 | /* Look at and handle the next short option-character. */ | ||
780 | |||
781 | { | ||
782 | char c = *nextchar++; | ||
783 | char *temp = my_index (optstring, c); | ||
784 | |||
785 | /* Increment `GNoptind' when we start to process its last character. */ | ||
786 | if (*nextchar == '\0') | ||
787 | ++GNoptind; | ||
788 | |||
789 | if (temp == NULL || c == ':') | ||
790 | { | ||
791 | if (GNopterr) | ||
792 | { | ||
793 | if (posixly_correct) | ||
794 | /* 1003.2 specifies the format of this message. */ | ||
795 | fprintf (stderr, _("%s: illegal option -- %c\n"), argv[0], c); | ||
796 | else | ||
797 | fprintf (stderr, _("%s: invalid option -- %c\n"), argv[0], c); | ||
798 | } | ||
799 | GNoptopt = c; | ||
800 | return '?'; | ||
801 | } | ||
802 | /* Convenience. Treat POSIX -W foo same as long option --foo */ | ||
803 | if (temp[0] == 'W' && temp[1] == ';') | ||
804 | { | ||
805 | char *nameend; | ||
806 | const struct GNoption *p; | ||
807 | const struct GNoption *pfound = NULL; | ||
808 | int exact = 0; | ||
809 | int ambig = 0; | ||
810 | int indfound = 0; | ||
811 | int option_index; | ||
812 | |||
813 | /* This is an option that requires an argument. */ | ||
814 | if (*nextchar != '\0') | ||
815 | { | ||
816 | GNoptarg = nextchar; | ||
817 | /* If we end this ARGV-element by taking the rest as an arg, | ||
818 | we must advance to the next element now. */ | ||
819 | GNoptind++; | ||
820 | } | ||
821 | else if (GNoptind == argc) | ||
822 | { | ||
823 | if (GNopterr) | ||
824 | { | ||
825 | /* 1003.2 specifies the format of this message. */ | ||
826 | fprintf (stderr, _("%s: option requires an argument -- %c\n"), | ||
827 | argv[0], c); | ||
828 | } | ||
829 | GNoptopt = c; | ||
830 | if (optstring[0] == ':') | ||
831 | c = ':'; | ||
832 | else | ||
833 | c = '?'; | ||
834 | return c; | ||
835 | } | ||
836 | else | ||
837 | /* We already incremented `GNoptind' once; | ||
838 | increment it again when taking next ARGV-elt as argument. */ | ||
839 | GNoptarg = argv[GNoptind++]; | ||
840 | |||
841 | /* GNoptarg is now the argument, see if it's in the | ||
842 | table of longopts. */ | ||
843 | |||
844 | for (nextchar = nameend = GNoptarg; *nameend && *nameend != '='; | ||
845 | nameend++) | ||
846 | /* Do nothing. */ ; | ||
847 | |||
848 | /* Test all long options for either exact match | ||
849 | or abbreviated matches. */ | ||
850 | for (p = longopts, option_index = 0; p->name; p++, option_index++) | ||
851 | if (!strncmp (p->name, nextchar, nameend - nextchar)) | ||
852 | { | ||
853 | if ((unsigned int) (nameend - nextchar) == strlen (p->name)) | ||
854 | { | ||
855 | /* Exact match found. */ | ||
856 | pfound = p; | ||
857 | indfound = option_index; | ||
858 | exact = 1; | ||
859 | break; | ||
860 | } | ||
861 | else if (pfound == NULL) | ||
862 | { | ||
863 | /* First nonexact match found. */ | ||
864 | pfound = p; | ||
865 | indfound = option_index; | ||
866 | } | ||
867 | else | ||
868 | /* Second or later nonexact match found. */ | ||
869 | ambig = 1; | ||
870 | } | ||
871 | if (ambig && !exact) | ||
872 | { | ||
873 | if (GNopterr) | ||
874 | fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"), | ||
875 | argv[0], argv[GNoptind]); | ||
876 | nextchar += strlen (nextchar); | ||
877 | GNoptind++; | ||
878 | return '?'; | ||
879 | } | ||
880 | if (pfound != NULL) | ||
881 | { | ||
882 | option_index = indfound; | ||
883 | if (*nameend) | ||
884 | { | ||
885 | /* Don't test has_arg with >, because some C compilers don't | ||
886 | allow it to be used on enums. */ | ||
887 | if (pfound->has_arg) | ||
888 | GNoptarg = nameend + 1; | ||
889 | else | ||
890 | { | ||
891 | if (GNopterr) | ||
892 | fprintf (stderr, _("\ | ||
893 | %s: option `-W %s' does not allow an argument\n"), argv[0], pfound->name); | ||
894 | |||
895 | nextchar += strlen (nextchar); | ||
896 | return '?'; | ||
897 | } | ||
898 | } | ||
899 | else if (pfound->has_arg == 1) | ||
900 | { | ||
901 | if (GNoptind < argc) | ||
902 | GNoptarg = argv[GNoptind++]; | ||
903 | else | ||
904 | { | ||
905 | if (GNopterr) | ||
906 | fprintf (stderr, | ||
907 | _("%s: option `%s' requires an argument\n"), | ||
908 | argv[0], argv[GNoptind - 1]); | ||
909 | nextchar += strlen (nextchar); | ||
910 | return optstring[0] == ':' ? ':' : '?'; | ||
911 | } | ||
912 | } | ||
913 | nextchar += strlen (nextchar); | ||
914 | if (longind != NULL) | ||
915 | *longind = option_index; | ||
916 | if (pfound->flag) | ||
917 | { | ||
918 | *(pfound->flag) = pfound->val; | ||
919 | return 0; | ||
920 | } | ||
921 | return pfound->val; | ||
922 | } | ||
923 | nextchar = NULL; | ||
924 | return 'W'; /* Let the application handle it. */ | ||
925 | } | ||
926 | if (temp[1] == ':') | ||
927 | { | ||
928 | if (temp[2] == ':') | ||
929 | { | ||
930 | /* This is an option that accepts an argument optionally. */ | ||
931 | if (*nextchar != '\0') | ||
932 | { | ||
933 | GNoptarg = nextchar; | ||
934 | GNoptind++; | ||
935 | } | ||
936 | else | ||
937 | GNoptarg = NULL; | ||
938 | nextchar = NULL; | ||
939 | } | ||
940 | else | ||
941 | { | ||
942 | /* This is an option that requires an argument. */ | ||
943 | if (*nextchar != '\0') | ||
944 | { | ||
945 | GNoptarg = nextchar; | ||
946 | /* If we end this ARGV-element by taking the rest as an arg, | ||
947 | we must advance to the next element now. */ | ||
948 | GNoptind++; | ||
949 | } | ||
950 | else if (GNoptind == argc) | ||
951 | { | ||
952 | if (GNopterr) | ||
953 | { | ||
954 | /* 1003.2 specifies the format of this message. */ | ||
955 | fprintf (stderr, | ||
956 | _("%s: option requires an argument -- %c\n"), | ||
957 | argv[0], c); | ||
958 | } | ||
959 | GNoptopt = c; | ||
960 | if (optstring[0] == ':') | ||
961 | c = ':'; | ||
962 | else | ||
963 | c = '?'; | ||
964 | } | ||
965 | else | ||
966 | /* We already incremented `GNoptind' once; | ||
967 | increment it again when taking next ARGV-elt as argument. */ | ||
968 | GNoptarg = argv[GNoptind++]; | ||
969 | nextchar = NULL; | ||
970 | } | ||
971 | } | ||
972 | return c; | ||
973 | } | ||
974 | } | ||
975 | |||
976 | static int | ||
977 | GNgetopt_long (int argc, | ||
978 | char *const *argv, | ||
979 | const char *options, | ||
980 | const struct GNoption *long_options, int *opt_index) | ||
981 | { | ||
982 | return GN_getopt_internal (argc, argv, options, long_options, opt_index, 0); | ||
983 | } | ||
984 | |||
985 | /* ******************** now the GNUnet specific modifications... ********************* */ | ||
986 | |||
987 | /** | ||
988 | * Parse the command line. | ||
989 | * | ||
990 | * @param binaryName name of the binary / application with options | ||
991 | * @param cfg for storing/accessing configuration data | ||
992 | * @param allOptions defined options and handlers | ||
993 | * @param argc number of arguments | ||
994 | * @param argv actual arguments | ||
995 | * @return index into argv with first non-option | ||
996 | * argument, or -1 on error | ||
997 | */ | ||
998 | int | ||
999 | GNUNET_GETOPT_run (const char *binaryOptions, | ||
1000 | struct GNUNET_CONFIGURATION_Handle *cfg, | ||
1001 | const struct GNUNET_GETOPT_CommandLineOption *allOptions, | ||
1002 | unsigned int argc, char *const *argv) | ||
1003 | { | ||
1004 | struct GNoption *long_options; | ||
1005 | struct GNUNET_GETOPT_CommandLineProcessorContext clpc; | ||
1006 | int count; | ||
1007 | int i; | ||
1008 | char *shorts; | ||
1009 | int spos; | ||
1010 | int cont; | ||
1011 | int c; | ||
1012 | |||
1013 | GNUNET_assert (argc > 0); | ||
1014 | GNoptind = 0; | ||
1015 | clpc.binaryName = argv[0]; | ||
1016 | clpc.binaryOptions = binaryOptions; | ||
1017 | clpc.allOptions = allOptions; | ||
1018 | clpc.argv = argv; | ||
1019 | clpc.argc = argc; | ||
1020 | clpc.cfg = cfg; | ||
1021 | count = 0; | ||
1022 | while (allOptions[count].name != NULL) | ||
1023 | count++; | ||
1024 | long_options = GNUNET_malloc (sizeof (struct GNoption) * (count + 1)); | ||
1025 | shorts = GNUNET_malloc (count * 2 + 1); | ||
1026 | spos = 0; | ||
1027 | for (i = 0; i < count; i++) | ||
1028 | { | ||
1029 | long_options[i].name = allOptions[i].name; | ||
1030 | long_options[i].has_arg = allOptions[i].require_argument; | ||
1031 | long_options[i].flag = NULL; | ||
1032 | long_options[i].val = allOptions[i].shortName; | ||
1033 | shorts[spos++] = allOptions[i].shortName; | ||
1034 | if (allOptions[i].require_argument != 0) | ||
1035 | shorts[spos++] = ':'; | ||
1036 | } | ||
1037 | long_options[count].name = NULL; | ||
1038 | long_options[count].has_arg = 0; | ||
1039 | long_options[count].flag = NULL; | ||
1040 | long_options[count].val = '\0'; | ||
1041 | shorts[spos++] = '\0'; | ||
1042 | cont = GNUNET_OK; | ||
1043 | /* main getopt loop */ | ||
1044 | while (cont == GNUNET_OK) | ||
1045 | { | ||
1046 | int option_index = 0; | ||
1047 | c = GNgetopt_long (argc, argv, shorts, long_options, &option_index); | ||
1048 | |||
1049 | if (c == GNUNET_SYSERR) | ||
1050 | break; /* No more flags to process */ | ||
1051 | |||
1052 | for (i = 0; i < count; i++) | ||
1053 | { | ||
1054 | clpc.currentArgument = GNoptind - 1; | ||
1055 | if ((char) c == allOptions[i].shortName) | ||
1056 | { | ||
1057 | cont = allOptions[i].processor (&clpc, | ||
1058 | allOptions[i].scls, | ||
1059 | allOptions[i].name, GNoptarg); | ||
1060 | break; | ||
1061 | } | ||
1062 | } | ||
1063 | if (i == count) | ||
1064 | { | ||
1065 | fprintf (stderr, _("Use --help to get a list of options.\n")); | ||
1066 | cont = GNUNET_SYSERR; | ||
1067 | } | ||
1068 | } | ||
1069 | |||
1070 | GNUNET_free (shorts); | ||
1071 | GNUNET_free (long_options); | ||
1072 | if (cont == GNUNET_SYSERR) | ||
1073 | return GNUNET_SYSERR; | ||
1074 | return GNoptind; | ||
1075 | } | ||
1076 | |||
1077 | /* end of getopt.c */ | ||