1 /* $OpenBSD: getopt_long.c,v 1.26 2013/06/08 22:47:56 millert Exp $ */
2 /* $NetBSD: getopt_long.c,v 1.15 2002/01/31 22:43:40 tv Exp $ */
5 * Copyright (c) 2002 Todd C. Miller <Todd.Miller@courtesan.com>
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.
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.
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.
24 * Copyright (c) 2000 The NetBSD Foundation, Inc.
25 * All rights reserved.
27 * This code is derived from software contributed to The NetBSD Foundation
28 * by Dieter Baron and Thomas Klausner.
30 * Redistribution and use in source and binary forms, with or without
31 * modification, are permitted provided that the following conditions
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.
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.
58 #define GNU_COMPATIBLE /* Be more compatible, configure's use us! */
60 #if 0 /* we prefer to keep our getopt(3) */
61 #define REPLACE_GETOPT /* use this getopt as the system getopt(3) */
65 int opterr = 1; /* if error message should be printed */
66 int optind = 1; /* index into parent argv vector */
67 int optopt = '?'; /* character checked for validity */
68 int optreset; /* reset getopt */
69 char *optarg; /* argument associated with option */
72 #define PRINT_ERROR ((opterr) && (*options != ':'))
74 #define FLAG_PERMUTE 0x01 /* permute non-options to the end of argv */
75 #define FLAG_ALLARGS 0x02 /* treat non-options as args to option "-1" */
76 #define FLAG_LONGONLY 0x04 /* operate as getopt_long_only */
79 #define BADCH (int)'?'
80 #define BADARG ((*options == ':') ? (int)':' : (int)'?')
81 #define INORDER (int)1
83 static char EMSG[] = "";
86 #define NO_PREFIX (-1)
92 static int getopt_internal(int, char * const *, const char *,
93 const struct option *, int *, int);
94 static int parse_long_options(char * const *, const char *,
95 const struct option *, int *, int, int);
96 static int gcd(int, int);
97 static void permute_args(int, int, int, char * const *);
99 static char *place = EMSG; /* option letter processing */
101 /* XXX: set optreset to 1 rather than these two */
102 static int nonopt_start = -1; /* first non option argument (for permute) */
103 static int nonopt_end = -1; /* first option after non options (for permute) */
106 static const char recargchar[] = "option requires an argument -- %c";
107 static const char illoptchar[] = "illegal option -- %c"; /* From P1003.2 */
108 #ifdef GNU_COMPATIBLE
109 static int dash_prefix = NO_PREFIX;
110 static const char gnuoptchar[] = "invalid option -- %c";
112 static const char recargstring[] = "option `%s%s' requires an argument";
113 static const char ambig[] = "option `%s%.*s' is ambiguous";
114 static const char noarg[] = "option `%s%.*s' doesn't allow an argument";
115 static const char illoptstring[] = "unrecognized option `%s%s'";
117 static const char recargstring[] = "option requires an argument -- %s";
118 static const char ambig[] = "ambiguous option -- %.*s";
119 static const char noarg[] = "option doesn't take an argument -- %.*s";
120 static const char illoptstring[] = "unknown option -- %s";
124 * Compute the greatest common divisor of a and b.
142 * Exchange the block from nonopt_start to nonopt_end with the block
143 * from nonopt_end to opt_end (keeping the same order of arguments
147 permute_args(int panonopt_start, int panonopt_end, int opt_end,
150 int cstart, cyclelen, i, j, ncycle, nnonopts, nopts, pos;
154 * compute lengths of blocks and number and size of cycles
156 nnonopts = panonopt_end - panonopt_start;
157 nopts = opt_end - panonopt_end;
158 ncycle = gcd(nnonopts, nopts);
159 cyclelen = (opt_end - panonopt_start) / ncycle;
161 for (i = 0; i < ncycle; i++) {
162 cstart = panonopt_end+i;
164 for (j = 0; j < cyclelen; j++) {
165 if (pos >= panonopt_end)
170 /* LINTED const cast */
171 ((char **) nargv)[pos] = nargv[cstart];
172 /* LINTED const cast */
173 ((char **)nargv)[cstart] = swap;
179 * parse_long_options --
180 * Parse long options in argc/argv argument vector.
181 * Returns -1 if short_too is set and the option does not match long_options.
184 parse_long_options(char * const *nargv, const char *options,
185 const struct option *long_options, int *idx, int short_too, int flags)
187 char *current_argv, *has_equal;
188 #ifdef GNU_COMPATIBLE
189 const char *current_dash;
191 size_t current_argv_len;
192 int i, match, exact_match, second_partial_match;
194 current_argv = place;
195 #ifdef GNU_COMPATIBLE
196 switch (dash_prefix) {
204 current_dash = "-W ";
213 second_partial_match = 0;
217 if ((has_equal = strchr(current_argv, '=')) != NULL) {
218 /* argument found (--option=arg) */
219 current_argv_len = has_equal - current_argv;
222 current_argv_len = strlen(current_argv);
224 for (i = 0; long_options[i].name; i++) {
225 /* find matching long option */
226 if (strncmp(current_argv, long_options[i].name,
230 if (strlen(long_options[i].name) == current_argv_len) {
237 * If this is a known short option, don't allow
238 * a partial match of a single character.
240 if (short_too && current_argv_len == 1)
243 if (match == -1) /* first partial match */
245 else if ((flags & FLAG_LONGONLY) ||
246 long_options[i].has_arg !=
247 long_options[match].has_arg ||
248 long_options[i].flag != long_options[match].flag ||
249 long_options[i].val != long_options[match].val)
250 second_partial_match = 1;
252 if (!exact_match && second_partial_match) {
253 /* ambiguous abbreviation */
256 #ifdef GNU_COMPATIBLE
259 (int)current_argv_len,
264 if (match != -1) { /* option found */
265 if (long_options[match].has_arg == no_argument
269 #ifdef GNU_COMPATIBLE
272 (int)current_argv_len,
275 * XXX: GNU sets optopt to val regardless of flag
277 if (long_options[match].flag == NULL)
278 optopt = long_options[match].val;
281 #ifdef GNU_COMPATIBLE
287 if (long_options[match].has_arg == required_argument ||
288 long_options[match].has_arg == optional_argument) {
291 else if (long_options[match].has_arg ==
294 * optional argument doesn't use next nargv
296 optarg = nargv[optind++];
299 if ((long_options[match].has_arg == required_argument)
300 && (optarg == NULL)) {
302 * Missing argument; leading ':' indicates no error
303 * should be generated.
307 #ifdef GNU_COMPATIBLE
312 * XXX: GNU sets optopt to val regardless of flag
314 if (long_options[match].flag == NULL)
315 optopt = long_options[match].val;
321 } else { /* unknown option */
328 #ifdef GNU_COMPATIBLE
337 if (long_options[match].flag) {
338 *long_options[match].flag = long_options[match].val;
341 return (long_options[match].val);
346 * Parse argc/argv argument vector. Called by user level routines.
349 getopt_internal(int nargc, char * const *nargv, const char *options,
350 const struct option *long_options, int *idx, int flags)
352 char *oli; /* option letter list index */
353 int optchar, short_too;
354 static int posixly_correct = -1;
360 * XXX Some GNU programs (like cvs) set optind to 0 instead of
361 * XXX using optreset. Work around this braindamage.
364 optind = optreset = 1;
367 * Disable GNU extensions if POSIXLY_CORRECT is set or options
368 * string begins with a '+'.
370 if (posixly_correct == -1 || optreset)
371 posixly_correct = (getenv("POSIXLY_CORRECT") != NULL);
373 flags |= FLAG_ALLARGS;
374 else if (posixly_correct || *options == '+')
375 flags &= ~FLAG_PERMUTE;
376 if (*options == '+' || *options == '-')
381 nonopt_start = nonopt_end = -1;
383 if (optreset || !*place) { /* update scanning pointer */
385 if (optind >= nargc) { /* end of argument vector */
387 if (nonopt_end != -1) {
388 /* do permutation, if we have to */
389 permute_args(nonopt_start, nonopt_end,
391 optind -= nonopt_end - nonopt_start;
393 else if (nonopt_start != -1) {
395 * If we skipped non-options, set optind
396 * to the first of them.
398 optind = nonopt_start;
400 nonopt_start = nonopt_end = -1;
403 if (*(place = nargv[optind]) != '-' ||
404 #ifdef GNU_COMPATIBLE
407 (place[1] == '\0' && strchr(options, '-') == NULL)) {
409 place = EMSG; /* found non-option */
410 if (flags & FLAG_ALLARGS) {
413 * return non-option as argument to option 1
415 optarg = nargv[optind++];
418 if (!(flags & FLAG_PERMUTE)) {
420 * If no permutation wanted, stop parsing
421 * at first non-option.
426 if (nonopt_start == -1)
427 nonopt_start = optind;
428 else if (nonopt_end != -1) {
429 permute_args(nonopt_start, nonopt_end,
431 nonopt_start = optind -
432 (nonopt_end - nonopt_start);
436 /* process next argument */
439 if (nonopt_start != -1 && nonopt_end == -1)
443 * If we have "-" do nothing, if "--" we are done.
445 if (place[1] != '\0' && *++place == '-' && place[1] == '\0') {
449 * We found an option (--), so if we skipped
450 * non-options, we have to permute.
452 if (nonopt_end != -1) {
453 permute_args(nonopt_start, nonopt_end,
455 optind -= nonopt_end - nonopt_start;
457 nonopt_start = nonopt_end = -1;
463 * Check long options if:
464 * 1) we were passed some
465 * 2) the arg is not just "-"
466 * 3) either the arg starts with -- we are getopt_long_only()
468 if (long_options != NULL && place != nargv[optind] &&
469 (*place == '-' || (flags & FLAG_LONGONLY))) {
471 #ifdef GNU_COMPATIBLE
472 dash_prefix = D_PREFIX;
475 place++; /* --foo long option */
477 return (BADARG); /* malformed option */
478 #ifdef GNU_COMPATIBLE
479 dash_prefix = DD_PREFIX;
481 } else if (*place != ':' && strchr(options, *place) != NULL)
482 short_too = 1; /* could be short option too */
484 optchar = parse_long_options(nargv, options, long_options,
485 idx, short_too, flags);
492 if ((optchar = (int)*place++) == (int)':' ||
493 (optchar == (int)'-' && *place != '\0') ||
494 (oli = strchr(options, optchar)) == NULL) {
496 * If the user specified "-" and '-' isn't listed in
497 * options, return -1 (non-option) as per POSIX.
498 * Otherwise, it is an unknown option character (or ':').
500 if (optchar == (int)'-' && *place == '\0')
504 #ifdef GNU_COMPATIBLE
506 warnx(posixly_correct ? illoptchar : gnuoptchar,
510 warnx(illoptchar, optchar);
515 if (long_options != NULL && optchar == 'W' && oli[1] == ';') {
517 if (*place) /* no space */
519 else if (++optind >= nargc) { /* no arg */
522 warnx(recargchar, optchar);
525 } else /* white space */
526 place = nargv[optind];
527 #ifdef GNU_COMPATIBLE
528 dash_prefix = W_PREFIX;
530 optchar = parse_long_options(nargv, options, long_options,
535 if (*++oli != ':') { /* doesn't take argument */
538 } else { /* takes (optional) argument */
540 if (*place) /* no white space */
542 else if (oli[1] != ':') { /* arg not optional */
543 if (++optind >= nargc) { /* no arg */
546 warnx(recargchar, optchar);
550 optarg = nargv[optind];
555 /* dump back option letter */
559 #ifdef REPLACE_GETOPT
562 * Parse argc/argv argument vector.
564 * [eventually this will replace the BSD getopt]
567 getopt(int nargc, char * const *nargv, const char *options)
571 * We don't pass FLAG_PERMUTE to getopt_internal() since
572 * the BSD getopt(3) (unlike GNU) has never done this.
574 * Furthermore, since many privileged programs call getopt()
575 * before dropping privileges it makes sense to keep things
576 * as simple (and bug-free) as possible.
578 return (getopt_internal(nargc, nargv, options, NULL, NULL, 0));
580 #endif /* REPLACE_GETOPT */
584 * Parse argc/argv argument vector.
587 getopt_long(int nargc, char * const *nargv, const char *options,
588 const struct option *long_options, int *idx)
591 return (getopt_internal(nargc, nargv, options, long_options, idx,
596 * getopt_long_only --
597 * Parse argc/argv argument vector.
600 getopt_long_only(int nargc, char * const *nargv, const char *options,
601 const struct option *long_options, int *idx)
604 return (getopt_internal(nargc, nargv, options, long_options, idx,
605 FLAG_PERMUTE|FLAG_LONGONLY));