b91e2391 |
1 | /* -*-c-*- |
2 | * |
a1af6b50 |
3 | * $Id: mdwopt.c,v 1.10 2004/04/08 01:36:24 mdw Exp $ |
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4 | * |
5 | * Options parsing, similar to GNU @getopt_long@ |
6 | * |
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7 | * (c) 1996 Straylight/Edgeware |
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8 | */ |
9 | |
10 | /*----- Licensing notice --------------------------------------------------* |
11 | * |
12 | * This file is part of many programs. |
13 | * |
14 | * `mdwopt' is free software; you can redistribute it and/or modify |
15 | * it under the terms of the GNU Library General Public License as |
16 | * published by the Free Software Foundation; either version 2 of the |
17 | * License, or (at your option) any later version. |
18 | * |
19 | * `mdwopt' 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 Library General Public License for more details. |
23 | * |
24 | * You should have received a copy of the GNU Library General Public |
4033d96b |
25 | * License along with `mdwopt'; if not, write to the Free |
26 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
27 | * MA 02111-1307, USA. |
b91e2391 |
28 | */ |
29 | |
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30 | /*----- External dependencies ---------------------------------------------*/ |
31 | |
32 | #include <ctype.h> |
33 | #include <stdio.h> |
34 | #include <stdlib.h> |
35 | #include <string.h> |
36 | |
37 | #include "mdwopt.h" |
38 | |
39 | /*----- Configuration things ----------------------------------------------*/ |
40 | |
41 | #if defined(__riscos) |
42 | # define PATHSEP '.' |
43 | #elif defined(__OS2__) || defined(__MSDOS__) || defined(__WINNT__) |
44 | # define PATHSEP '\\' |
45 | #else /* Assume a sane filing system */ |
46 | # define PATHSEP '/' |
47 | #endif |
48 | |
49 | /*----- Global variables --------------------------------------------------*/ |
50 | |
51 | mdwopt_data mdwopt_global = {0, 0, 0, 1, 0, 0, 0, 0, 0}; |
52 | |
53 | enum { |
379c3233 |
54 | ORD_PERMUTE = 0, /* Permute the options (default) */ |
55 | ORD_RETURN = 1, /* Return non-option things */ |
56 | ORD_POSIX = 2, /* Do POSIX-type hacking */ |
57 | ORD_NEGATE = 4 /* Magic negate-next-thing flag */ |
b91e2391 |
58 | }; |
59 | |
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60 | /*----- Word splitting ----------------------------------------------------*/ |
61 | |
62 | #ifdef BUILDING_MLIB |
63 | # include "str.h" |
64 | # define qword str_qword |
65 | #else |
66 | |
67 | /* --- @qword@ --- * |
68 | * |
69 | * Arguments: @char **pp@ = address of pointer into string |
70 | * @unsigned f@ = various flags |
71 | * |
72 | * Returns: Pointer to the next space-separated possibly-quoted word from |
73 | * the string, or null. |
74 | * |
75 | * Use: Fetches the next word from a string. If the flag |
76 | * @STRF_QUOTE@ is set, the `\' character acts as an escape, and |
77 | * single and double quotes protect whitespace. |
78 | */ |
79 | |
80 | #define STRF_QUOTE 1u |
81 | |
82 | static char *qword(char **pp, unsigned f) |
83 | { |
84 | char *p = *pp, *q, *qq; |
85 | int st = 0, pst = 0; |
86 | |
87 | /* --- Preliminaries --- */ |
88 | |
89 | if (!p) |
90 | return (0); |
91 | while (isspace((unsigned char)*p)) |
92 | p++; |
93 | if (!*p) { |
94 | *pp = 0; |
95 | return (0); |
96 | } |
97 | |
98 | /* --- Main work --- */ |
99 | |
100 | for (q = qq = p; *q; q++) { |
101 | switch (st) { |
102 | case '\\': |
103 | *qq++ = *q; |
104 | st = pst; |
105 | break; |
106 | case '\'': |
107 | case '\"': |
108 | if (*q == st) |
109 | st = pst = 0; |
110 | else if (*q == '\\') |
111 | st = '\\'; |
112 | else |
113 | *qq++ = *q; |
114 | break; |
115 | default: |
116 | if (isspace((unsigned char)*q)) { |
117 | do q++; while (*q && isspace((unsigned char)*q)); |
118 | goto done; |
119 | } else if (!(f & STRF_QUOTE)) |
120 | goto stdchar; |
121 | switch (*q) { |
122 | case '\\': |
123 | st = '\\'; |
124 | break; |
125 | case '\'': |
126 | case '\"': |
127 | st = pst = *q; |
128 | break; |
129 | default: |
130 | stdchar: |
131 | *qq++ = *q; |
132 | break; |
133 | } |
134 | } |
135 | } |
136 | |
137 | /* --- Finished --- */ |
138 | |
139 | done: |
140 | *pp = *q ? q : 0; |
141 | *qq++ = 0; |
142 | return (p); |
143 | } |
144 | |
145 | #endif |
146 | |
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147 | /*----- Main code ---------------------------------------------------------*/ |
148 | |
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149 | /* --- @nextword@ --- * |
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150 | * |
151 | * Arguments: @int argc@ = number of command line options |
152 | * @char *argv[]@ = pointer to command line options |
153 | * @mdwopt_data *data@ = pointer to persistent state |
154 | * |
155 | * Returns: Pointer to the next word to handle, or 0 |
156 | * |
157 | * Use: Extracts the next word from the command line or environment |
158 | * variable. |
159 | */ |
160 | |
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161 | static char *nextword(int argc, char *const *argv, mdwopt_data *data) |
b91e2391 |
162 | { |
163 | if (data->ind == -1) { |
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164 | char *p; |
165 | if ((p = qword(&data->env, STRF_QUOTE)) != 0) |
166 | return (p); |
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167 | data->ind = 1; |
168 | } |
169 | |
170 | if (data->next == argc) |
171 | return (0); |
172 | return (argv[data->next++]); |
173 | } |
174 | |
379c3233 |
175 | /* --- @permute@ --- * |
b91e2391 |
176 | * |
177 | * Arguments: @char *argv[]@ = pointer to command line arguments |
178 | * @mdwopt_data *data@ = pointer to persistent data |
179 | * |
180 | * Returns: -- |
181 | * |
182 | * Use: Moves a command line option into the right place. |
183 | */ |
184 | |
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185 | static void permute(char *const *argv, mdwopt_data *data) |
b91e2391 |
186 | { |
187 | char **v = (char **)argv; |
188 | if (data->ind != -1) { |
189 | int i = data->next - 1; |
190 | char *p = v[i]; |
191 | while (i > data->ind) { |
192 | v[i] = v[i - 1]; |
193 | i--; |
194 | } |
195 | v[i] = p; |
196 | data->ind++; |
197 | } |
198 | } |
199 | |
379c3233 |
200 | /* --- @findOpt@ --- * |
b91e2391 |
201 | * |
202 | * Arguments: @int o@ = which option to search for |
203 | * @const char *shortopt@ = short options string to search |
204 | * @mdwopt_data *data@ = pointer to persistant state |
205 | * |
206 | * Returns: Pointer to rest of short options string (including magic |
207 | * characters) |
208 | * |
209 | * Use: Looks up a short option in the given string. |
210 | */ |
211 | |
379c3233 |
212 | static const char *findOpt(int o, const char *shortopt, |
b91e2391 |
213 | mdwopt_data *data) |
214 | { |
4ab923c4 |
215 | const char *p = shortopt; |
b91e2391 |
216 | for (;;) { |
4ab923c4 |
217 | if (!*p) |
b91e2391 |
218 | return (0); |
219 | |
379c3233 |
220 | if (o != *p || (p[1] != '+' && data->order & ORD_NEGATE)) { |
4ab923c4 |
221 | p++; |
222 | while (*p == '+') |
223 | p++; |
224 | while (*p == ':') |
b91e2391 |
225 | p++; |
b91e2391 |
226 | } |
227 | else |
228 | return (p + 1); |
229 | } |
230 | } |
231 | |
232 | /* --- @mdwopt@ --- * |
233 | * |
234 | * Arguments: @int argc@ = number of command line arguments |
235 | * @char * const *argv@ = pointer to command line arguments |
236 | * @const char *shortopt@ = pointer to short options information |
237 | * @const struct option *longopts@ = pointer to long opts info |
238 | * @int *longind@ = where to store matched longopt |
239 | * @mdwopt_data *data@ = persistent state for the parser |
240 | * @int flags@ = various useful flags |
241 | * |
242 | * Returns: Value of option found next, or an error character, or |
243 | * @EOF@ for the last thing. |
244 | * |
245 | * Use: Reads options. The routine should be more-or-less compatible |
246 | * with standard getopts, although it provides many more |
247 | * features even than the standard GNU implementation. |
248 | * |
249 | * The precise manner of options parsing is determined by |
250 | * various flag settings, which are described below. By setting |
251 | * flag values appropriately, you can achieve behaviour very |
252 | * similar to most other getopt routines. |
253 | * |
254 | * |
255 | * How options parsing appears to users |
256 | * |
257 | * A command line consists of a number of `words' (which may |
258 | * contain spaces, according to various shell quoting |
259 | * conventions). A word may be an option, an argument to an |
260 | * option, or a non-option. An option begins with a special |
261 | * character, usually `%|-|%', although `%|+|%' is also used |
262 | * sometimes. As special exceptions, the word containing only a |
263 | * `%|-|%' is considered to be a non-option, since it usually |
264 | * represents standard input or output as a filename, and the |
265 | * word containing a double-dash `%|--|%' is used to mark all |
266 | * following words as being non-options regardless of their |
267 | * initial character. |
268 | * |
269 | * Traditionally, all words after the first non-option have been |
270 | * considered to be non-options automatically, so that options |
271 | * must be specified before filenames. However, this |
272 | * implementation can extract all the options from the command |
273 | * line regardless of their position. This can usually be |
274 | * disabled by setting one of the environment variables |
275 | * `%|POSIXLY_CORRECT|%' or `%|_POSIX_OPTION_ORDER|%'. |
276 | * |
277 | * There are two different styles of options: `short' and |
278 | * `long'. |
279 | * |
280 | * Short options are the sort which Unix has known for ages: an |
281 | * option is a single letter, preceded by a `%|-|%'. Short |
282 | * options can be joined together to save space (and possibly to |
283 | * make silly words): e.g., instead of giving options |
284 | * `%|-x -y|%', a user could write `%|-xy|%'. Some short |
285 | * options can have arguments, which appear after the option |
286 | * letter, either immediately following, or in the next `word' |
287 | * (so an option with an argument could be written as |
288 | * `%|-o foo|%' or as `%|-ofoo|%'). Note that options with |
289 | * optional arguments must be written in the second style. |
290 | * |
291 | * When a short option controls a flag setting, it is sometimes |
292 | * possible to explicitly turn the flag off, as well as turning |
293 | * it on, (usually to override default options). This is |
294 | * usually done by using a `%|+|%' instead of a `%|-|%' to |
295 | * introduce the option. |
296 | * |
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297 | * Long options, as popularized by the GNU utilities, are given |
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298 | * long-ish memorable names, preceded by a double-dash `%|--|%'. |
299 | * Since their names are more than a single character, long |
300 | * options can't be combined in the same way as short options. |
301 | * Arguments to long options may be given either in the same |
302 | * `word', separated from the option name by an equals sign, or |
303 | * in the following `word'. |
304 | * |
305 | * Long option names can be abbreviated if necessary, as long |
306 | * as the abbreviation is unique. This means that options can |
307 | * have sensible and memorable names but still not require much |
308 | * typing from an experienced user. |
309 | * |
310 | * Like short options, long options can control flag settings. |
311 | * The options to manipulate these settings come in pairs: an |
312 | * option of the form `%|--set-flag|%' might set the flag, while |
313 | * an option of the form `%|--no-set-flag|%' might clear it. |
314 | * |
315 | * It is usual for applications to provide both short and long |
316 | * options with identical behaviour. Some applications with |
317 | * lots of options may only provide long options (although they |
318 | * will often be only two or three characters long). In this |
319 | * case, long options can be preceded with a single `%|-|%' |
320 | * character, and negated by a `%|+|%' character. |
321 | * |
322 | * Finally, some (older) programs accept arguments of the form |
323 | * `%%@.{"-"<number>}%%', to set some numerical parameter, |
324 | * typically a line count of some kind. |
325 | * |
326 | * |
327 | * How programs parse options |
328 | * |
329 | * An application parses its options by calling mdwopt |
330 | * repeatedly. Each time it is called, mdwopt returns a value |
331 | * describing the option just read, and stores information about |
332 | * the option in a data block. The value %$-1$% is returned |
333 | * when there are no more options to be read. The `%|?|%' |
334 | * character is returned when an error is encountered. |
335 | * |
336 | * Before starting to parse options, the value @data->ind@ must |
337 | * be set to 0 or 1. The value of @data->err@ can also be set, |
338 | * to choose whether errors are reported by mdwopt. |
339 | * |
340 | * The program's `@argc@' and `@argv@' arguments are passed to |
341 | * the options parser, so that it can read the command line. A |
342 | * flags word is also passed, allowing the program fine control |
343 | * over parsing. The flags are described above. |
344 | * |
345 | * Short options are described by a string, which once upon a |
346 | * time just contained the permitted option characters. Now the |
347 | * options string begins with a collection of flag characters, |
348 | * and various flag characters can be put after options |
349 | * characters to change their properties. |
350 | * |
351 | * If the first character of the short options string is |
352 | * `%|+|%', `%|-|%' or `%|!|%', the order in which options are |
353 | * read is modified, as follows: |
354 | * |
355 | * `%|+|%' forces the POSIX order to be used. As soon as a non- |
356 | * option is found, mdwopt returns %$-1$%. |
357 | * |
358 | * `%|-|%' makes mdwopt treat non-options as being `special' |
359 | * sorts of option. When a non-option word is found, the |
360 | * value 0 is returned, and the actual text of the word |
361 | * is stored as being the option's argument. |
362 | * |
363 | * `%|!|%' forces the default order to be used. The entire |
364 | * command line is scanned for options, which are |
365 | * returned in order. However, during this process, |
366 | * the options are moved in the @argv@ array, so that |
367 | * they appear before the non- options. |
368 | * |
369 | * A `%|:|%' character may be placed after the ordering flag (or |
370 | * at the very beginning if no ordering flag is given) which |
371 | * indicates that the character `%|:|%', rather than `%|?|%', |
372 | * should be returned if a missing argument error is detected. |
373 | * |
374 | * Each option in the string can be followed by a `%|+|%' sign, |
375 | * indicating that it can be negated, a `%|:|%' sign indicating |
376 | * that it requires an argument, or a `%|::|%' string, |
377 | * indicating an optional argument. Both `%|+|%' and `%|:|%' or |
378 | * `%|::|%' may be given, although the `%|+|%' must come first. |
379 | * |
380 | * If an option is found, the option character is returned to |
381 | * the caller. A pointer to an argument is stored in |
382 | * @data->arg@, or @NULL@ is stored if there was no argument. |
383 | * If a negated option was found, the option character is |
379c3233 |
384 | * returned ORred with @OPTF_NEGATED@ (bit 8 set). |
b91e2391 |
385 | * |
386 | * Long options are described in a table. Each entry in the |
387 | * table is of type @struct option@, and the table is terminated |
388 | * by an entry whose @name@ field is null. Each option has |
389 | * a flags word which, due to historical reasons, is called |
390 | * @has_arg@. This describes various properties of the option, |
391 | * such as what sort of argument it takes, and whether it can |
392 | * be negated. |
393 | * |
394 | * When mdwopt finds a long option, it looks the name up in the |
395 | * table. The index of the matching entry is stored in the |
396 | * @longind@ variable, passed to mdwopt (unless @longind@ is 0): |
397 | * a value of %$-1$% indicates that no long option was |
398 | * found. The behaviour is then dependent on the values in the |
399 | * table entry. If @flag@ is nonzero, it points to an integer |
400 | * to be modified by mdwopt. Usually the value in the @val@ |
401 | * field is simply stored in the @flag@ variable. If the flag |
379c3233 |
402 | * @OPTF_SWITCH@ is set, however, the value is combined with |
b91e2391 |
403 | * the existing value of the flags using a bitwise OR. If |
379c3233 |
404 | * @OPTF_NEGATE@ is set, then the flag bit will be cleared if a |
b91e2391 |
405 | * matching negated long option is found. The value 0 is |
406 | * returned. |
407 | * |
408 | * If @flag@ is zero, the value in @val@ is returned by mdwopt, |
409 | * possibly with bit 8 set if the option was negated. |
410 | * |
411 | * Arguments for long options are stored in @data->arg@, as |
412 | * before. |
413 | * |
414 | * Numeric options, if enabled, cause the value `%|#|%' to be |
415 | * returned, and the numeric value to be stored in @data->opt@. |
416 | * |
379c3233 |
417 | * If the flag @OPTF_ENVVAR@ is set on entry, options will be |
b91e2391 |
418 | * extracted from an environment variable whose name is built by |
664ee843 |
419 | * capitalizing all the letters of the program's name. (This |
b91e2391 |
420 | * allows a user to have different default settings for a |
664ee843 |
421 | * program, by calling it through different symbolic links.) |
422 | */ |
b91e2391 |
423 | |
424 | int mdwopt(int argc, char *const *argv, |
425 | const char *shortopt, |
426 | const struct option *longopts, int *longind, |
427 | mdwopt_data *data, int flags) |
428 | { |
429 | /* --- Local variables --- */ |
430 | |
4ab923c4 |
431 | char *p, *q, *r; |
432 | char *prefix; |
433 | int i; |
434 | char noarg = '?'; |
b91e2391 |
435 | |
436 | /* --- Sort out our data --- */ |
437 | |
4ab923c4 |
438 | if (!data) |
439 | data = &mdwopt_global; |
b91e2391 |
440 | |
441 | /* --- See if this is the first time --- */ |
442 | |
379c3233 |
443 | if (data->ind == 0 || (data->ind == 1 && ~flags & OPTF_NOPROGNAME)) { |
b91e2391 |
444 | |
445 | /* --- Sort out default returning order --- */ |
446 | |
4ab923c4 |
447 | if (getenv("_POSIX_OPTION_ORDER") || |
448 | getenv("POSIXLY_CORRECT")) |
449 | data->order = ORD_POSIX; |
b91e2391 |
450 | else |
4ab923c4 |
451 | data->order = ORD_PERMUTE; |
b91e2391 |
452 | |
453 | /* --- Now see what the caller actually wants --- */ |
454 | |
4ab923c4 |
455 | switch (shortopt[0]) { |
456 | case '-': |
379c3233 |
457 | data->order = ORD_RETURN; |
b91e2391 |
458 | break; |
4ab923c4 |
459 | case '+': |
379c3233 |
460 | data->order = ORD_POSIX; |
b91e2391 |
461 | break; |
4ab923c4 |
462 | case '!': |
379c3233 |
463 | data->order = ORD_PERMUTE; |
b91e2391 |
464 | break; |
465 | } |
466 | |
467 | /* --- Now decide on the program's name --- */ |
468 | |
379c3233 |
469 | if (~flags & OPTF_NOPROGNAME) { |
b91e2391 |
470 | p = q = (char *)argv[0]; |
471 | while (*p) { |
472 | if (*p++ == PATHSEP) |
473 | q = p; |
474 | } |
475 | data->prog = q; |
476 | |
477 | data->ind = data->next = 1; |
478 | data->list = 0; |
479 | |
480 | /* --- See about environment variables --- * |
481 | * |
482 | * Be careful. The program may be setuid, and an attacker might have |
483 | * given us a long name in @argv[0]@. If the name is very long, don't |
484 | * support this option. |
485 | */ |
486 | |
379c3233 |
487 | if (flags & OPTF_ENVVAR && strlen(data->prog) < 48) { |
b91e2391 |
488 | |
489 | char buf[64]; |
490 | |
491 | /* --- For RISC OS, support a different format --- * |
492 | * |
493 | * Acorn's RISC OS tends to put settings in variables named |
494 | * `App$Options' rather than `APP'. Under RISC OS, I'll support |
495 | * both methods, just to avoid confuddlement. |
496 | */ |
497 | |
498 | #ifdef __riscos |
499 | sprintf(buf, "%s$Options", data->prog); |
500 | p = getenv(buf); |
501 | if (!p) { |
502 | #endif |
503 | |
4ab923c4 |
504 | p = buf; |
505 | q = data->prog; |
506 | while (*q) |
507 | *p++ = toupper(*q++); |
508 | *p++ = 0; |
509 | p = getenv(buf); |
b91e2391 |
510 | |
511 | #ifdef __riscos |
512 | } |
513 | #endif |
514 | |
515 | /* --- Copy the options string into a buffer --- */ |
516 | |
4ab923c4 |
517 | if (p) { |
518 | q = malloc(strlen(p) + 1); |
519 | if (!q) { |
520 | fprintf(stderr, |
b91e2391 |
521 | "%s: Not enough memory to read settings in " |
522 | "environment variable\n", |
523 | data->prog); |
4ab923c4 |
524 | } else { |
525 | strcpy(q, p); |
526 | data->ind = -1; |
527 | data->env = data->estart = q; |
b91e2391 |
528 | } |
529 | } |
530 | |
531 | } |
532 | } |
533 | else |
534 | data->ind = data->next = 0; |
535 | } |
536 | |
537 | /* --- Do some initial bodgery --- * |
538 | * |
539 | * The @shortopt@ string can have some interesting characters at the |
540 | * beginning. We'll skip past them. |
541 | */ |
542 | |
543 | switch (shortopt[0]) { |
544 | case '+': |
545 | case '-': |
546 | case '!': |
547 | shortopt++; |
548 | break; |
549 | } |
550 | |
551 | if (shortopt[0] == ':') { |
552 | noarg = shortopt[0]; |
553 | shortopt++; |
554 | } |
555 | |
4ab923c4 |
556 | if (longind) |
557 | *longind = -1; |
558 | data->opt = -1; |
559 | data->arg = 0; |
b91e2391 |
560 | |
561 | /* --- Now go off and search for an option --- */ |
562 | |
563 | if (!data->list || !*data->list) { |
564 | data->order &= 3; /* Clear negation flag */ |
565 | |
566 | /* --- Now we need to find the next option --- * |
567 | * |
568 | * Exactly how we do this depends on the settings of the order variable. |
569 | * We identify options as being things starting with `%|-|%', and which |
570 | * aren't equal to `%|-|%' or `%|--|%'. We'll look for options until: |
571 | * |
379c3233 |
572 | * * We find something which isn't an option AND @order == ORD_POSIX@ |
b91e2391 |
573 | * * We find a `%|--|%' |
574 | * * We reach the end of the list |
575 | * |
576 | * There are some added little wrinkles, which we'll meet as we go. |
577 | */ |
578 | |
4ab923c4 |
579 | for (;;) { |
d0da523a |
580 | p = nextword(argc, argv, data); |
4ab923c4 |
581 | if (!p) |
582 | return (EOF); |
b91e2391 |
583 | |
584 | /* --- See if we've found an option --- */ |
585 | |
379c3233 |
586 | if ((p[0] == '-' || (p[0] == '+' && flags & OPTF_NEGATION)) && |
b91e2391 |
587 | p[1] != 0) { |
4ab923c4 |
588 | if (strcmp(p, "--") == 0) { |
589 | permute(argv, data); |
590 | return (EOF); |
b91e2391 |
591 | } |
4ab923c4 |
592 | break; |
b91e2391 |
593 | } |
594 | |
595 | /* --- Figure out how to proceed --- */ |
596 | |
597 | switch (data->order & 3) { |
4ab923c4 |
598 | case ORD_POSIX: |
599 | return (EOF); |
b91e2391 |
600 | break; |
4ab923c4 |
601 | case ORD_PERMUTE: |
b91e2391 |
602 | break; |
4ab923c4 |
603 | case ORD_RETURN: |
604 | permute(argv, data); |
605 | data->arg = p; |
606 | return (0); |
b91e2391 |
607 | } |
608 | } |
609 | |
610 | /* --- We found an option --- */ |
611 | |
4ab923c4 |
612 | permute(argv, data); |
b91e2391 |
613 | |
614 | /* --- Check for a numeric option --- * |
615 | * |
616 | * We only check the first character (or the second if the first is a |
617 | * sign). This ought to be enough. |
618 | */ |
619 | |
379c3233 |
620 | if (flags & OPTF_NUMBERS && (p[0] == '-' || flags & OPTF_NEGNUMBER)) { |
b91e2391 |
621 | if (((p[1] == '+' || p[1] == '-') && isdigit((unsigned char)p[2])) || |
622 | isdigit((unsigned char)p[1])) { |
623 | data->opt = strtol(p + 1, &data->arg, 10); |
624 | while (isspace((unsigned char)data->arg[0])) |
625 | data->arg++; |
626 | if (!data->arg[0]) |
627 | data->arg = 0; |
379c3233 |
628 | return (p[0] == '-' ? '#' : '#' | OPTF_NEGATED); |
b91e2391 |
629 | } |
630 | } |
631 | |
632 | /* --- Check for a long option --- */ |
633 | |
634 | if (p[0] == '+') |
379c3233 |
635 | data->order |= ORD_NEGATE; |
b91e2391 |
636 | |
637 | if (((p[0] == '-' && p[1] == '-') || |
379c3233 |
638 | (flags & OPTF_NOSHORTS && !findOpt(p[1], shortopt, data))) && |
4ab923c4 |
639 | (~flags & OPTF_NOLONGS)) |
b91e2391 |
640 | { |
4ab923c4 |
641 | int match = -1; |
b91e2391 |
642 | |
4ab923c4 |
643 | if (p[0] == '+') { |
644 | data->order |= ORD_NEGATE; |
645 | p++; |
646 | prefix = "+"; |
647 | } else if (p[1] == '-') { |
379c3233 |
648 | if ((flags & OPTF_NEGATION) && strncmp(p + 2, "no-", 3) == 0) { |
4ab923c4 |
649 | p += 5; |
650 | prefix = "--no-"; |
651 | data->order |= ORD_NEGATE; |
b91e2391 |
652 | } else { |
4ab923c4 |
653 | p += 2; |
654 | prefix = "--"; |
b91e2391 |
655 | } |
656 | } else { |
379c3233 |
657 | if ((flags & OPTF_NEGATION) && strncmp(p + 1, "no-", 3) == 0) { |
4ab923c4 |
658 | p += 4; |
659 | prefix = "-no-"; |
660 | data->order |= ORD_NEGATE; |
b91e2391 |
661 | } else { |
4ab923c4 |
662 | p++; |
663 | prefix = "-"; |
b91e2391 |
664 | } |
665 | } |
666 | |
4ab923c4 |
667 | for (i = 0; longopts[i].name; i++) { |
379c3233 |
668 | if ((data->order & ORD_NEGATE) && |
669 | (~longopts[i].has_arg & OPTF_NEGATE)) |
4ab923c4 |
670 | continue; |
671 | |
672 | r = (char *) longopts[i].name; |
673 | q = p; |
674 | for (;;) { |
675 | if (*q == 0 || *q == '=') { |
676 | if (*r == 0) { |
677 | match = i; |
678 | goto botched; |
b91e2391 |
679 | } |
4ab923c4 |
680 | if (match == -1) { |
681 | match = i; |
682 | break; |
b91e2391 |
683 | } else { |
4ab923c4 |
684 | match = -1; |
685 | goto botched; |
b91e2391 |
686 | } |
687 | } |
4ab923c4 |
688 | else if (*q != *r) |
689 | break; |
690 | q++, r++; |
b91e2391 |
691 | } |
692 | } |
693 | |
694 | botched: |
4ab923c4 |
695 | if (match == -1) { |
b91e2391 |
696 | if (data->err) { |
5b59e227 |
697 | fprintf(stderr, "%s: unrecognized option `%s%s'\n", |
b91e2391 |
698 | data->prog, |
699 | prefix, p); |
700 | } |
701 | return ('?'); |
702 | } |
703 | |
4ab923c4 |
704 | if (longind) |
705 | *longind = match; |
b91e2391 |
706 | |
707 | /* --- Handle argument behaviour --- */ |
708 | |
4ab923c4 |
709 | while (*p != 0 && *p != '=') |
b91e2391 |
710 | p++; |
4ab923c4 |
711 | p = (*p ? p + 1 : 0); |
712 | q = (char *) longopts[match].name; |
b91e2391 |
713 | |
4ab923c4 |
714 | switch (longopts[match].has_arg & OPTF_ARG) { |
715 | case OPTF_NOARG: |
b91e2391 |
716 | if (p) { |
717 | if (data->err) { |
718 | fprintf(stderr, |
719 | "%s: option `%s%s' does not accept arguments\n", |
720 | data->prog, |
721 | prefix, q); |
722 | } |
723 | return ('?'); |
724 | } |
725 | break; |
726 | |
4ab923c4 |
727 | case OPTF_ARGREQ: |
728 | if (!p) { |
d0da523a |
729 | p = nextword(argc, argv, data); |
b91e2391 |
730 | |
4ab923c4 |
731 | if (!p) { |
b91e2391 |
732 | if (data->err) { |
733 | fprintf(stderr, "%s: option `%s%s' requires an argument\n", |
734 | data->prog, |
735 | prefix, q); |
736 | } |
737 | return (noarg); |
738 | } |
739 | |
379c3233 |
740 | permute(argv, data); |
b91e2391 |
741 | } |
742 | break; |
743 | |
4ab923c4 |
744 | case OPTF_ARGOPT: |
b91e2391 |
745 | /* Who cares? */ |
746 | break; |
747 | } |
748 | data->arg = p; |
749 | |
750 | /* --- Do correct things now we have a match --- */ |
751 | |
4ab923c4 |
752 | if (longopts[match].flag) { |
379c3233 |
753 | if (longopts[match].has_arg & OPTF_SWITCH) { |
754 | if (data->order & ORD_NEGATE) |
b91e2391 |
755 | *longopts[match].flag &= ~longopts[match].val; |
756 | else |
757 | *longopts[match].flag |= longopts[match].val; |
758 | } else { |
379c3233 |
759 | if (data->order & ORD_NEGATE) |
b91e2391 |
760 | *longopts[match].flag = 0; |
761 | else |
762 | *longopts[match].flag = longopts[match].val; |
763 | } |
4ab923c4 |
764 | return (0); |
b91e2391 |
765 | } else { |
379c3233 |
766 | if (data->order & ORD_NEGATE) |
767 | return (longopts[match].val | OPTF_NEGATED); |
b91e2391 |
768 | else |
769 | return (longopts[match].val); |
770 | } |
771 | } |
772 | |
773 | /* --- Do short options things --- */ |
774 | |
775 | else { |
4ab923c4 |
776 | if (p[0] == '+') |
379c3233 |
777 | data->order |= ORD_NEGATE; |
4ab923c4 |
778 | data->list = p + 1; |
b91e2391 |
779 | } |
780 | } |
781 | |
782 | /* --- Now process the short options --- */ |
783 | |
4ab923c4 |
784 | i = *data->list++; |
785 | data->opt = i; |
b91e2391 |
786 | |
379c3233 |
787 | p = (char *) findOpt(i, shortopt, data); |
4ab923c4 |
788 | if (!p) { |
b91e2391 |
789 | if (data->err) { |
790 | fprintf(stderr, "%s: unknown option `%c%c'\n", |
791 | data->prog, |
379c3233 |
792 | data->order & ORD_NEGATE ? '+' : '-', |
b91e2391 |
793 | i); |
794 | } |
795 | return ('?'); |
796 | } |
797 | |
4ab923c4 |
798 | data->opt = i; |
b91e2391 |
799 | |
800 | /* --- Sort out an argument, if we expect one --- */ |
801 | |
4ab923c4 |
802 | if (p[0] == ':') { |
803 | q = (data->list[0] ? data->list : 0); |
804 | data->list = 0; |
805 | if (p[1] != ':' && !q) { |
b91e2391 |
806 | |
807 | /* --- Same code as before --- */ |
808 | |
d0da523a |
809 | q = nextword(argc, argv, data); |
4ab923c4 |
810 | if (!q) { |
b91e2391 |
811 | if (data->err) { |
812 | fprintf(stderr, "%s: option `%c%c' requires an argument\n", |
813 | data->prog, |
379c3233 |
814 | data->order & ORD_NEGATE ? '+' : '-', |
b91e2391 |
815 | i); |
816 | } |
817 | return (noarg); |
818 | } |
379c3233 |
819 | permute(argv, data); |
b91e2391 |
820 | } |
821 | |
822 | data->arg = q; |
823 | } |
379c3233 |
824 | return ((data->order & ORD_NEGATE) ? i | OPTF_NEGATED : i); |
b91e2391 |
825 | } |
826 | |
827 | /*----- That's all, folks -------------------------------------------------*/ |