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authorcvs2svn <admin@example.com>2012-07-13 17:49:56 +0000
committercvs2svn <admin@example.com>2012-07-13 17:49:56 +0000
commitee04221ea8063435416c7e6369e6eae76843aa71 (patch)
tree821921a1dd0a5a3cece91121e121cc63c4b68128 /src/lib/libc/stdlib/getopt_long.c
parentadf6731f6e1d04718aee00cb93435143046aee9a (diff)
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This commit was manufactured by cvs2git to create tag 'eric_g2k12'.eric_g2k12
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-rw-r--r--src/lib/libc/stdlib/getopt_long.c511
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diff --git a/src/lib/libc/stdlib/getopt_long.c b/src/lib/libc/stdlib/getopt_long.c
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1/* $OpenBSD: getopt_long.c,v 1.25 2011/03/05 22:10:11 guenther Exp $ */
2/* $NetBSD: getopt_long.c,v 1.15 2002/01/31 22:43:40 tv Exp $ */
3
4/*
5 * Copyright (c) 2002 Todd C. Miller <Todd.Miller@courtesan.com>
6 *
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 *
19 * Sponsored in part by the Defense Advanced Research Projects
20 * Agency (DARPA) and Air Force Research Laboratory, Air Force
21 * Materiel Command, USAF, under agreement number F39502-99-1-0512.
22 */
23/*-
24 * Copyright (c) 2000 The NetBSD Foundation, Inc.
25 * All rights reserved.
26 *
27 * This code is derived from software contributed to The NetBSD Foundation
28 * by Dieter Baron and Thomas Klausner.
29 *
30 * Redistribution and use in source and binary forms, with or without
31 * modification, are permitted provided that the following conditions
32 * are met:
33 * 1. Redistributions of source code must retain the above copyright
34 * notice, this list of conditions and the following disclaimer.
35 * 2. Redistributions in binary form must reproduce the above copyright
36 * notice, this list of conditions and the following disclaimer in the
37 * documentation and/or other materials provided with the distribution.
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
40 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
41 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
43 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
44 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
45 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
46 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
47 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
48 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
49 * POSSIBILITY OF SUCH DAMAGE.
50 */
51
52#include <err.h>
53#include <errno.h>
54#include <getopt.h>
55#include <stdlib.h>
56#include <string.h>
57
58int opterr = 1; /* if error message should be printed */
59int optind = 1; /* index into parent argv vector */
60int optopt = '?'; /* character checked for validity */
61int optreset; /* reset getopt */
62char *optarg; /* argument associated with option */
63
64#define PRINT_ERROR ((opterr) && (*options != ':'))
65
66#define FLAG_PERMUTE 0x01 /* permute non-options to the end of argv */
67#define FLAG_ALLARGS 0x02 /* treat non-options as args to option "-1" */
68#define FLAG_LONGONLY 0x04 /* operate as getopt_long_only */
69
70/* return values */
71#define BADCH (int)'?'
72#define BADARG ((*options == ':') ? (int)':' : (int)'?')
73#define INORDER (int)1
74
75#define EMSG ""
76
77static int getopt_internal(int, char * const *, const char *,
78 const struct option *, int *, int);
79static int parse_long_options(char * const *, const char *,
80 const struct option *, int *, int);
81static int gcd(int, int);
82static void permute_args(int, int, int, char * const *);
83
84static char *place = EMSG; /* option letter processing */
85
86/* XXX: set optreset to 1 rather than these two */
87static int nonopt_start = -1; /* first non option argument (for permute) */
88static int nonopt_end = -1; /* first option after non options (for permute) */
89
90/* Error messages */
91static const char recargchar[] = "option requires an argument -- %c";
92static const char recargstring[] = "option requires an argument -- %s";
93static const char ambig[] = "ambiguous option -- %.*s";
94static const char noarg[] = "option doesn't take an argument -- %.*s";
95static const char illoptchar[] = "unknown option -- %c";
96static const char illoptstring[] = "unknown option -- %s";
97
98/*
99 * Compute the greatest common divisor of a and b.
100 */
101static int
102gcd(int a, int b)
103{
104 int c;
105
106 c = a % b;
107 while (c != 0) {
108 a = b;
109 b = c;
110 c = a % b;
111 }
112
113 return (b);
114}
115
116/*
117 * Exchange the block from nonopt_start to nonopt_end with the block
118 * from nonopt_end to opt_end (keeping the same order of arguments
119 * in each block).
120 */
121static void
122permute_args(int panonopt_start, int panonopt_end, int opt_end,
123 char * const *nargv)
124{
125 int cstart, cyclelen, i, j, ncycle, nnonopts, nopts, pos;
126 char *swap;
127
128 /*
129 * compute lengths of blocks and number and size of cycles
130 */
131 nnonopts = panonopt_end - panonopt_start;
132 nopts = opt_end - panonopt_end;
133 ncycle = gcd(nnonopts, nopts);
134 cyclelen = (opt_end - panonopt_start) / ncycle;
135
136 for (i = 0; i < ncycle; i++) {
137 cstart = panonopt_end+i;
138 pos = cstart;
139 for (j = 0; j < cyclelen; j++) {
140 if (pos >= panonopt_end)
141 pos -= nnonopts;
142 else
143 pos += nopts;
144 swap = nargv[pos];
145 /* LINTED const cast */
146 ((char **) nargv)[pos] = nargv[cstart];
147 /* LINTED const cast */
148 ((char **)nargv)[cstart] = swap;
149 }
150 }
151}
152
153/*
154 * parse_long_options --
155 * Parse long options in argc/argv argument vector.
156 * Returns -1 if short_too is set and the option does not match long_options.
157 */
158static int
159parse_long_options(char * const *nargv, const char *options,
160 const struct option *long_options, int *idx, int short_too)
161{
162 char *current_argv, *has_equal;
163 size_t current_argv_len;
164 int i, match;
165
166 current_argv = place;
167 match = -1;
168
169 optind++;
170
171 if ((has_equal = strchr(current_argv, '=')) != NULL) {
172 /* argument found (--option=arg) */
173 current_argv_len = has_equal - current_argv;
174 has_equal++;
175 } else
176 current_argv_len = strlen(current_argv);
177
178 for (i = 0; long_options[i].name; i++) {
179 /* find matching long option */
180 if (strncmp(current_argv, long_options[i].name,
181 current_argv_len))
182 continue;
183
184 if (strlen(long_options[i].name) == current_argv_len) {
185 /* exact match */
186 match = i;
187 break;
188 }
189 /*
190 * If this is a known short option, don't allow
191 * a partial match of a single character.
192 */
193 if (short_too && current_argv_len == 1)
194 continue;
195
196 if (match == -1) /* partial match */
197 match = i;
198 else {
199 /* ambiguous abbreviation */
200 if (PRINT_ERROR)
201 warnx(ambig, (int)current_argv_len,
202 current_argv);
203 optopt = 0;
204 return (BADCH);
205 }
206 }
207 if (match != -1) { /* option found */
208 if (long_options[match].has_arg == no_argument
209 && has_equal) {
210 if (PRINT_ERROR)
211 warnx(noarg, (int)current_argv_len,
212 current_argv);
213 /*
214 * XXX: GNU sets optopt to val regardless of flag
215 */
216 if (long_options[match].flag == NULL)
217 optopt = long_options[match].val;
218 else
219 optopt = 0;
220 return (BADARG);
221 }
222 if (long_options[match].has_arg == required_argument ||
223 long_options[match].has_arg == optional_argument) {
224 if (has_equal)
225 optarg = has_equal;
226 else if (long_options[match].has_arg ==
227 required_argument) {
228 /*
229 * optional argument doesn't use next nargv
230 */
231 optarg = nargv[optind++];
232 }
233 }
234 if ((long_options[match].has_arg == required_argument)
235 && (optarg == NULL)) {
236 /*
237 * Missing argument; leading ':' indicates no error
238 * should be generated.
239 */
240 if (PRINT_ERROR)
241 warnx(recargstring,
242 current_argv);
243 /*
244 * XXX: GNU sets optopt to val regardless of flag
245 */
246 if (long_options[match].flag == NULL)
247 optopt = long_options[match].val;
248 else
249 optopt = 0;
250 --optind;
251 return (BADARG);
252 }
253 } else { /* unknown option */
254 if (short_too) {
255 --optind;
256 return (-1);
257 }
258 if (PRINT_ERROR)
259 warnx(illoptstring, current_argv);
260 optopt = 0;
261 return (BADCH);
262 }
263 if (idx)
264 *idx = match;
265 if (long_options[match].flag) {
266 *long_options[match].flag = long_options[match].val;
267 return (0);
268 } else
269 return (long_options[match].val);
270}
271
272/*
273 * getopt_internal --
274 * Parse argc/argv argument vector. Called by user level routines.
275 */
276static int
277getopt_internal(int nargc, char * const *nargv, const char *options,
278 const struct option *long_options, int *idx, int flags)
279{
280 char *oli; /* option letter list index */
281 int optchar, short_too;
282 static int posixly_correct = -1;
283
284 if (options == NULL)
285 return (-1);
286
287 /*
288 * XXX Some GNU programs (like cvs) set optind to 0 instead of
289 * XXX using optreset. Work around this braindamage.
290 */
291 if (optind == 0)
292 optind = optreset = 1;
293
294 /*
295 * Disable GNU extensions if POSIXLY_CORRECT is set or options
296 * string begins with a '+'.
297 */
298 if (posixly_correct == -1 || optreset)
299 posixly_correct = (getenv("POSIXLY_CORRECT") != NULL);
300 if (*options == '-')
301 flags |= FLAG_ALLARGS;
302 else if (posixly_correct || *options == '+')
303 flags &= ~FLAG_PERMUTE;
304 if (*options == '+' || *options == '-')
305 options++;
306
307 optarg = NULL;
308 if (optreset)
309 nonopt_start = nonopt_end = -1;
310start:
311 if (optreset || !*place) { /* update scanning pointer */
312 optreset = 0;
313 if (optind >= nargc) { /* end of argument vector */
314 place = EMSG;
315 if (nonopt_end != -1) {
316 /* do permutation, if we have to */
317 permute_args(nonopt_start, nonopt_end,
318 optind, nargv);
319 optind -= nonopt_end - nonopt_start;
320 }
321 else if (nonopt_start != -1) {
322 /*
323 * If we skipped non-options, set optind
324 * to the first of them.
325 */
326 optind = nonopt_start;
327 }
328 nonopt_start = nonopt_end = -1;
329 return (-1);
330 }
331 if (*(place = nargv[optind]) != '-' ||
332 (place[1] == '\0' && strchr(options, '-') == NULL)) {
333 place = EMSG; /* found non-option */
334 if (flags & FLAG_ALLARGS) {
335 /*
336 * GNU extension:
337 * return non-option as argument to option 1
338 */
339 optarg = nargv[optind++];
340 return (INORDER);
341 }
342 if (!(flags & FLAG_PERMUTE)) {
343 /*
344 * If no permutation wanted, stop parsing
345 * at first non-option.
346 */
347 return (-1);
348 }
349 /* do permutation */
350 if (nonopt_start == -1)
351 nonopt_start = optind;
352 else if (nonopt_end != -1) {
353 permute_args(nonopt_start, nonopt_end,
354 optind, nargv);
355 nonopt_start = optind -
356 (nonopt_end - nonopt_start);
357 nonopt_end = -1;
358 }
359 optind++;
360 /* process next argument */
361 goto start;
362 }
363 if (nonopt_start != -1 && nonopt_end == -1)
364 nonopt_end = optind;
365
366 /*
367 * If we have "-" do nothing, if "--" we are done.
368 */
369 if (place[1] != '\0' && *++place == '-' && place[1] == '\0') {
370 optind++;
371 place = EMSG;
372 /*
373 * We found an option (--), so if we skipped
374 * non-options, we have to permute.
375 */
376 if (nonopt_end != -1) {
377 permute_args(nonopt_start, nonopt_end,
378 optind, nargv);
379 optind -= nonopt_end - nonopt_start;
380 }
381 nonopt_start = nonopt_end = -1;
382 return (-1);
383 }
384 }
385
386 /*
387 * Check long options if:
388 * 1) we were passed some
389 * 2) the arg is not just "-"
390 * 3) either the arg starts with -- we are getopt_long_only()
391 */
392 if (long_options != NULL && place != nargv[optind] &&
393 (*place == '-' || (flags & FLAG_LONGONLY))) {
394 short_too = 0;
395 if (*place == '-')
396 place++; /* --foo long option */
397 else if (*place != ':' && strchr(options, *place) != NULL)
398 short_too = 1; /* could be short option too */
399
400 optchar = parse_long_options(nargv, options, long_options,
401 idx, short_too);
402 if (optchar != -1) {
403 place = EMSG;
404 return (optchar);
405 }
406 }
407
408 if ((optchar = (int)*place++) == (int)':' ||
409 (optchar == (int)'-' && *place != '\0') ||
410 (oli = strchr(options, optchar)) == NULL) {
411 /*
412 * If the user specified "-" and '-' isn't listed in
413 * options, return -1 (non-option) as per POSIX.
414 * Otherwise, it is an unknown option character (or ':').
415 */
416 if (optchar == (int)'-' && *place == '\0')
417 return (-1);
418 if (!*place)
419 ++optind;
420 if (PRINT_ERROR)
421 warnx(illoptchar, optchar);
422 optopt = optchar;
423 return (BADCH);
424 }
425 if (long_options != NULL && optchar == 'W' && oli[1] == ';') {
426 /* -W long-option */
427 if (*place) /* no space */
428 /* NOTHING */;
429 else if (++optind >= nargc) { /* no arg */
430 place = EMSG;
431 if (PRINT_ERROR)
432 warnx(recargchar, optchar);
433 optopt = optchar;
434 return (BADARG);
435 } else /* white space */
436 place = nargv[optind];
437 optchar = parse_long_options(nargv, options, long_options,
438 idx, 0);
439 place = EMSG;
440 return (optchar);
441 }
442 if (*++oli != ':') { /* doesn't take argument */
443 if (!*place)
444 ++optind;
445 } else { /* takes (optional) argument */
446 optarg = NULL;
447 if (*place) /* no white space */
448 optarg = place;
449 else if (oli[1] != ':') { /* arg not optional */
450 if (++optind >= nargc) { /* no arg */
451 place = EMSG;
452 if (PRINT_ERROR)
453 warnx(recargchar, optchar);
454 optopt = optchar;
455 return (BADARG);
456 } else
457 optarg = nargv[optind];
458 }
459 place = EMSG;
460 ++optind;
461 }
462 /* dump back option letter */
463 return (optchar);
464}
465
466/*
467 * getopt --
468 * Parse argc/argv argument vector.
469 *
470 * [eventually this will replace the BSD getopt]
471 */
472int
473getopt(int nargc, char * const *nargv, const char *options)
474{
475
476 /*
477 * We don't pass FLAG_PERMUTE to getopt_internal() since
478 * the BSD getopt(3) (unlike GNU) has never done this.
479 *
480 * Furthermore, since many privileged programs call getopt()
481 * before dropping privileges it makes sense to keep things
482 * as simple (and bug-free) as possible.
483 */
484 return (getopt_internal(nargc, nargv, options, NULL, NULL, 0));
485}
486
487/*
488 * getopt_long --
489 * Parse argc/argv argument vector.
490 */
491int
492getopt_long(int nargc, char * const *nargv, const char *options,
493 const struct option *long_options, int *idx)
494{
495
496 return (getopt_internal(nargc, nargv, options, long_options, idx,
497 FLAG_PERMUTE));
498}
499
500/*
501 * getopt_long_only --
502 * Parse argc/argv argument vector.
503 */
504int
505getopt_long_only(int nargc, char * const *nargv, const char *options,
506 const struct option *long_options, int *idx)
507{
508
509 return (getopt_internal(nargc, nargv, options, long_options, idx,
510 FLAG_PERMUTE|FLAG_LONGONLY));
511}
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