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, 1996 |
7 |
Free Software Foundation, Inc. |
8 |
|
9 |
This file is part of the GNU C Library. Its master source is NOT part of |
10 |
the C library, however. The master source lives in /gd/gnu/lib. |
11 |
|
12 |
The GNU C Library is free software; you can redistribute it and/or |
13 |
modify it under the terms of the GNU Library General Public License as |
14 |
published by the Free Software Foundation; either version 2 of the |
15 |
License, or (at your option) any later version. |
16 |
|
17 |
The GNU C Library 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 GNU |
20 |
Library General Public License for more details. |
21 |
|
22 |
You should have received a copy of the GNU Library General Public |
23 |
License along with the GNU C Library; see the file COPYING.LIB. If |
24 |
not, write to the Free Software Foundation, Inc., 675 Mass Ave, |
25 |
Cambridge, MA 02139, USA. */ |
26 |
|
27 |
/* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>. |
28 |
Ditto for AIX 3.2 and <stdlib.h>. */ |
29 |
#ifndef _NO_PROTO |
30 |
#define _NO_PROTO |
31 |
#endif |
32 |
|
33 |
#ifdef HAVE_CONFIG_H |
34 |
#include <config.h> |
35 |
#endif |
36 |
|
37 |
#if !defined (__STDC__) || !__STDC__ |
38 |
/* This is a separate conditional since some stdc systems |
39 |
reject `defined (const)'. */ |
40 |
#ifndef const |
41 |
#define const |
42 |
#endif |
43 |
#endif |
44 |
|
45 |
#include <stdio.h> |
46 |
|
47 |
/* Comment out all this code if we are using the GNU C Library, and are not |
48 |
actually compiling the library itself. This code is part of the GNU C |
49 |
Library, but also included in many other GNU distributions. Compiling |
50 |
and linking in this code is a waste when using the GNU C library |
51 |
(especially if it is a shared library). Rather than having every GNU |
52 |
program understand `configure --with-gnu-libc' and omit the object files, |
53 |
it is simpler to just do this in the source for each such file. */ |
54 |
|
55 |
#if defined (_LIBC) || !defined (__GNU_LIBRARY__) |
56 |
|
57 |
|
58 |
/* This needs to come after some library #include |
59 |
to get __GNU_LIBRARY__ defined. */ |
60 |
#ifdef __GNU_LIBRARY__ |
61 |
/* Don't include stdlib.h for non-GNU C libraries because some of them |
62 |
contain conflicting prototypes for getopt. */ |
63 |
#include <stdlib.h> |
64 |
#include <unistd.h> |
65 |
#endif /* GNU C library. */ |
66 |
|
67 |
#ifdef VMS |
68 |
#include <unixlib.h> |
69 |
#if HAVE_STRING_H - 0 |
70 |
#include <string.h> |
71 |
#endif |
72 |
#endif |
73 |
|
74 |
#if defined (WIN32) && !defined (__CYGWIN32__) |
75 |
/* It's not Unix, really. See? Capital letters. */ |
76 |
#include <windows.h> |
77 |
#define getpid() GetCurrentProcessId() |
78 |
#endif |
79 |
|
80 |
#ifndef _ |
81 |
/* This is for other GNU distributions with internationalized messages. |
82 |
When compiling libc, the _ macro is predefined. */ |
83 |
#ifdef HAVE_LIBINTL_H |
84 |
# include <libintl.h> |
85 |
# define _(msgid) gettext (msgid) |
86 |
#else |
87 |
# define _(msgid) (msgid) |
88 |
#endif |
89 |
#endif |
90 |
|
91 |
/* This version of `getopt' appears to the caller like standard Unix `getopt' |
92 |
but it behaves differently for the user, since it allows the user |
93 |
to intersperse the options with the other arguments. |
94 |
|
95 |
As `getopt' works, it permutes the elements of ARGV so that, |
96 |
when it is done, all the options precede everything else. Thus |
97 |
all application programs are extended to handle flexible argument order. |
98 |
|
99 |
Setting the environment variable POSIXLY_CORRECT disables permutation. |
100 |
Then the behavior is completely standard. |
101 |
|
102 |
GNU application programs can use a third alternative mode in which |
103 |
they can distinguish the relative order of options and other arguments. */ |
104 |
|
105 |
#include "getopt.h" |
106 |
|
107 |
/* For communication from `getopt' to the caller. |
108 |
When `getopt' finds an option that takes an argument, |
109 |
the argument value is returned here. |
110 |
Also, when `ordering' is RETURN_IN_ORDER, |
111 |
each non-option ARGV-element is returned here. */ |
112 |
|
113 |
char *optarg = NULL; |
114 |
|
115 |
/* Index in ARGV of the next element to be scanned. |
116 |
This is used for communication to and from the caller |
117 |
and for communication between successive calls to `getopt'. |
118 |
|
119 |
On entry to `getopt', zero means this is the first call; initialize. |
120 |
|
121 |
When `getopt' returns EOF, this is the index of the first of the |
122 |
non-option elements that the caller should itself scan. |
123 |
|
124 |
Otherwise, `optind' communicates from one call to the next |
125 |
how much of ARGV has been scanned so far. */ |
126 |
|
127 |
/* XXX 1003.2 says this must be 1 before any call. */ |
128 |
int optind = 0; |
129 |
|
130 |
/* The next char to be scanned in the option-element |
131 |
in which the last option character we returned was found. |
132 |
This allows us to pick up the scan where we left off. |
133 |
|
134 |
If this is zero, or a null string, it means resume the scan |
135 |
by advancing to the next ARGV-element. */ |
136 |
|
137 |
static char *nextchar; |
138 |
|
139 |
/* Callers store zero here to inhibit the error message |
140 |
for unrecognized options. */ |
141 |
|
142 |
int opterr = 1; |
143 |
|
144 |
/* Set to an option character which was unrecognized. |
145 |
This must be initialized on some systems to avoid linking in the |
146 |
system's own getopt implementation. */ |
147 |
|
148 |
int optopt = '?'; |
149 |
|
150 |
/* Describe how to deal with options that follow non-option ARGV-elements. |
151 |
|
152 |
If the caller did not specify anything, |
153 |
the default is REQUIRE_ORDER if the environment variable |
154 |
POSIXLY_CORRECT is defined, PERMUTE otherwise. |
155 |
|
156 |
REQUIRE_ORDER means don't recognize them as options; |
157 |
stop option processing when the first non-option is seen. |
158 |
This is what Unix does. |
159 |
This mode of operation is selected by either setting the environment |
160 |
variable POSIXLY_CORRECT, or using `+' as the first character |
161 |
of the list of option characters. |
162 |
|
163 |
PERMUTE is the default. We permute the contents of ARGV as we scan, |
164 |
so that eventually all the non-options are at the end. This allows options |
165 |
to be given in any order, even with programs that were not written to |
166 |
expect this. |
167 |
|
168 |
RETURN_IN_ORDER is an option available to programs that were written |
169 |
to expect options and other ARGV-elements in any order and that care about |
170 |
the ordering of the two. We describe each non-option ARGV-element |
171 |
as if it were the argument of an option with character code 1. |
172 |
Using `-' as the first character of the list of option characters |
173 |
selects this mode of operation. |
174 |
|
175 |
The special argument `--' forces an end of option-scanning regardless |
176 |
of the value of `ordering'. In the case of RETURN_IN_ORDER, only |
177 |
`--' can cause `getopt' to return EOF with `optind' != ARGC. */ |
178 |
|
179 |
static enum |
180 |
{ |
181 |
REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER |
182 |
} ordering; |
183 |
|
184 |
/* Value of POSIXLY_CORRECT environment variable. */ |
185 |
static char *posixly_correct; |
186 |
|
187 |
#ifdef __GNU_LIBRARY__ |
188 |
/* We want to avoid inclusion of string.h with non-GNU libraries |
189 |
because there are many ways it can cause trouble. |
190 |
On some systems, it contains special magic macros that don't work |
191 |
in GCC. */ |
192 |
#include <string.h> |
193 |
#define my_index strchr |
194 |
#else |
195 |
|
196 |
/* Avoid depending on library functions or files |
197 |
whose names are inconsistent. */ |
198 |
|
199 |
char *getenv (); |
200 |
|
201 |
static char * |
202 |
my_index (str, chr) |
203 |
const char *str; |
204 |
int chr; |
205 |
{ |
206 |
while (*str) |
207 |
{ |
208 |
if (*str == chr) |
209 |
return (char *) str; |
210 |
str++; |
211 |
} |
212 |
return 0; |
213 |
} |
214 |
|
215 |
/* If using GCC, we can safely declare strlen this way. |
216 |
If not using GCC, it is ok not to declare it. */ |
217 |
#ifdef __GNUC__ |
218 |
/* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h. |
219 |
That was relevant to code that was here before. */ |
220 |
#if !defined (__STDC__) || !__STDC__ |
221 |
/* gcc with -traditional declares the built-in strlen to return int, |
222 |
and has done so at least since version 2.4.5. -- rms. */ |
223 |
extern int strlen (const char *); |
224 |
#endif /* not __STDC__ */ |
225 |
#endif /* __GNUC__ */ |
226 |
|
227 |
#endif /* not __GNU_LIBRARY__ */ |
228 |
|
229 |
/* Handle permutation of arguments. */ |
230 |
|
231 |
/* Describe the part of ARGV that contains non-options that have |
232 |
been skipped. `first_nonopt' is the index in ARGV of the first of them; |
233 |
`last_nonopt' is the index after the last of them. */ |
234 |
|
235 |
static int first_nonopt; |
236 |
static int last_nonopt; |
237 |
|
238 |
/* Bash 2.0 gives us an environment variable containing flags |
239 |
indicating ARGV elements that should not be considered arguments. */ |
240 |
|
241 |
static const char *nonoption_flags; |
242 |
static int nonoption_flags_len; |
243 |
|
244 |
/* Exchange two adjacent subsequences of ARGV. |
245 |
One subsequence is elements [first_nonopt,last_nonopt) |
246 |
which contains all the non-options that have been skipped so far. |
247 |
The other is elements [last_nonopt,optind), which contains all |
248 |
the options processed since those non-options were skipped. |
249 |
|
250 |
`first_nonopt' and `last_nonopt' are relocated so that they describe |
251 |
the new indices of the non-options in ARGV after they are moved. */ |
252 |
|
253 |
#if defined (__STDC__) && __STDC__ |
254 |
static void exchange (char **); |
255 |
#endif |
256 |
|
257 |
static void |
258 |
exchange (argv) |
259 |
char **argv; |
260 |
{ |
261 |
int bottom = first_nonopt; |
262 |
int middle = last_nonopt; |
263 |
int top = optind; |
264 |
char *tem; |
265 |
|
266 |
/* Exchange the shorter segment with the far end of the longer segment. |
267 |
That puts the shorter segment into the right place. |
268 |
It leaves the longer segment in the right place overall, |
269 |
but it consists of two parts that need to be swapped next. */ |
270 |
|
271 |
while (top > middle && middle > bottom) |
272 |
{ |
273 |
if (top - middle > middle - bottom) |
274 |
{ |
275 |
/* Bottom segment is the short one. */ |
276 |
int len = middle - bottom; |
277 |
register int i; |
278 |
|
279 |
/* Swap it with the top part of the top segment. */ |
280 |
for (i = 0; i < len; i++) |
281 |
{ |
282 |
tem = argv[bottom + i]; |
283 |
argv[bottom + i] = argv[top - (middle - bottom) + i]; |
284 |
argv[top - (middle - bottom) + i] = tem; |
285 |
} |
286 |
/* Exclude the moved bottom segment from further swapping. */ |
287 |
top -= len; |
288 |
} |
289 |
else |
290 |
{ |
291 |
/* Top segment is the short one. */ |
292 |
int len = top - middle; |
293 |
register int i; |
294 |
|
295 |
/* Swap it with the bottom part of the bottom segment. */ |
296 |
for (i = 0; i < len; i++) |
297 |
{ |
298 |
tem = argv[bottom + i]; |
299 |
argv[bottom + i] = argv[middle + i]; |
300 |
argv[middle + i] = tem; |
301 |
} |
302 |
/* Exclude the moved top segment from further swapping. */ |
303 |
bottom += len; |
304 |
} |
305 |
} |
306 |
|
307 |
/* Update records for the slots the non-options now occupy. */ |
308 |
|
309 |
first_nonopt += (optind - last_nonopt); |
310 |
last_nonopt = optind; |
311 |
} |
312 |
|
313 |
/* Initialize the internal data when the first call is made. */ |
314 |
|
315 |
#if defined (__STDC__) && __STDC__ |
316 |
static const char *_getopt_initialize (const char *); |
317 |
#endif |
318 |
static const char * |
319 |
_getopt_initialize (optstring) |
320 |
const char *optstring; |
321 |
{ |
322 |
/* Start processing options with ARGV-element 1 (since ARGV-element 0 |
323 |
is the program name); the sequence of previously skipped |
324 |
non-option ARGV-elements is empty. */ |
325 |
|
326 |
first_nonopt = last_nonopt = optind = 1; |
327 |
|
328 |
nextchar = NULL; |
329 |
|
330 |
posixly_correct = getenv ("POSIXLY_CORRECT"); |
331 |
|
332 |
/* Determine how to handle the ordering of options and nonoptions. */ |
333 |
|
334 |
if (optstring[0] == '-') |
335 |
{ |
336 |
ordering = RETURN_IN_ORDER; |
337 |
++optstring; |
338 |
} |
339 |
else if (optstring[0] == '+') |
340 |
{ |
341 |
ordering = REQUIRE_ORDER; |
342 |
++optstring; |
343 |
} |
344 |
else if (posixly_correct != NULL) |
345 |
ordering = REQUIRE_ORDER; |
346 |
else |
347 |
ordering = PERMUTE; |
348 |
|
349 |
if (posixly_correct == NULL) |
350 |
{ |
351 |
/* Bash 2.0 puts a special variable in the environment for each |
352 |
command it runs, specifying which ARGV elements are the results of |
353 |
file name wildcard expansion and therefore should not be |
354 |
considered as options. */ |
355 |
char var[100]; |
356 |
sprintf (var, "_%d_GNU_nonoption_argv_flags_", getpid ()); |
357 |
nonoption_flags = getenv (var); |
358 |
if (nonoption_flags == NULL) |
359 |
nonoption_flags_len = 0; |
360 |
else |
361 |
nonoption_flags_len = strlen (nonoption_flags); |
362 |
} |
363 |
|
364 |
return optstring; |
365 |
} |
366 |
|
367 |
/* Scan elements of ARGV (whose length is ARGC) for option characters |
368 |
given in OPTSTRING. |
369 |
|
370 |
If an element of ARGV starts with '-', and is not exactly "-" or "--", |
371 |
then it is an option element. The characters of this element |
372 |
(aside from the initial '-') are option characters. If `getopt' |
373 |
is called repeatedly, it returns successively each of the option characters |
374 |
from each of the option elements. |
375 |
|
376 |
If `getopt' finds another option character, it returns that character, |
377 |
updating `optind' and `nextchar' so that the next call to `getopt' can |
378 |
resume the scan with the following option character or ARGV-element. |
379 |
|
380 |
If there are no more option characters, `getopt' returns `EOF'. |
381 |
Then `optind' is the index in ARGV of the first ARGV-element |
382 |
that is not an option. (The ARGV-elements have been permuted |
383 |
so that those that are not options now come last.) |
384 |
|
385 |
OPTSTRING is a string containing the legitimate option characters. |
386 |
If an option character is seen that is not listed in OPTSTRING, |
387 |
return '?' after printing an error message. If you set `opterr' to |
388 |
zero, the error message is suppressed but we still return '?'. |
389 |
|
390 |
If a char in OPTSTRING is followed by a colon, that means it wants an arg, |
391 |
so the following text in the same ARGV-element, or the text of the following |
392 |
ARGV-element, is returned in `optarg'. Two colons mean an option that |
393 |
wants an optional arg; if there is text in the current ARGV-element, |
394 |
it is returned in `optarg', otherwise `optarg' is set to zero. |
395 |
|
396 |
If OPTSTRING starts with `-' or `+', it requests different methods of |
397 |
handling the non-option ARGV-elements. |
398 |
See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above. |
399 |
|
400 |
Long-named options begin with `--' instead of `-'. |
401 |
Their names may be abbreviated as long as the abbreviation is unique |
402 |
or is an exact match for some defined option. If they have an |
403 |
argument, it follows the option name in the same ARGV-element, separated |
404 |
from the option name by a `=', or else the in next ARGV-element. |
405 |
When `getopt' finds a long-named option, it returns 0 if that option's |
406 |
`flag' field is nonzero, the value of the option's `val' field |
407 |
if the `flag' field is zero. |
408 |
|
409 |
The elements of ARGV aren't really const, because we permute them. |
410 |
But we pretend they're const in the prototype to be compatible |
411 |
with other systems. |
412 |
|
413 |
LONGOPTS is a vector of `struct option' terminated by an |
414 |
element containing a name which is zero. |
415 |
|
416 |
LONGIND returns the index in LONGOPT of the long-named option found. |
417 |
It is only valid when a long-named option has been found by the most |
418 |
recent call. |
419 |
|
420 |
If LONG_ONLY is nonzero, '-' as well as '--' can introduce |
421 |
long-named options. */ |
422 |
|
423 |
int |
424 |
_getopt_internal (argc, argv, optstring, longopts, longind, long_only) |
425 |
int argc; |
426 |
char *const *argv; |
427 |
const char *optstring; |
428 |
const struct option *longopts; |
429 |
int *longind; |
430 |
int long_only; |
431 |
{ |
432 |
optarg = NULL; |
433 |
|
434 |
if (optind == 0) |
435 |
{ |
436 |
optstring = _getopt_initialize (optstring); |
437 |
optind = 1; /* Don't scan ARGV[0], the program name. */ |
438 |
} |
439 |
|
440 |
/* Test whether ARGV[optind] points to a non-option argument. |
441 |
Either it does not have option syntax, or there is an environment flag |
442 |
from the shell indicating it is not an option. */ |
443 |
#define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \ |
444 |
|| (optind < nonoption_flags_len \ |
445 |
&& nonoption_flags[optind] == '1')) |
446 |
|
447 |
if (nextchar == NULL || *nextchar == '\0') |
448 |
{ |
449 |
/* Advance to the next ARGV-element. */ |
450 |
|
451 |
/* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been |
452 |
moved back by the user (who may also have changed the arguments). */ |
453 |
if (last_nonopt > optind) |
454 |
last_nonopt = optind; |
455 |
if (first_nonopt > optind) |
456 |
first_nonopt = optind; |
457 |
|
458 |
if (ordering == PERMUTE) |
459 |
{ |
460 |
/* If we have just processed some options following some non-options, |
461 |
exchange them so that the options come first. */ |
462 |
|
463 |
if (first_nonopt != last_nonopt && last_nonopt != optind) |
464 |
exchange ((char **) argv); |
465 |
else if (last_nonopt != optind) |
466 |
first_nonopt = optind; |
467 |
|
468 |
/* Skip any additional non-options |
469 |
and extend the range of non-options previously skipped. */ |
470 |
|
471 |
while (optind < argc && NONOPTION_P) |
472 |
optind++; |
473 |
last_nonopt = optind; |
474 |
} |
475 |
|
476 |
/* The special ARGV-element `--' means premature end of options. |
477 |
Skip it like a null option, |
478 |
then exchange with previous non-options as if it were an option, |
479 |
then skip everything else like a non-option. */ |
480 |
|
481 |
if (optind != argc && !strcmp (argv[optind], "--")) |
482 |
{ |
483 |
optind++; |
484 |
|
485 |
if (first_nonopt != last_nonopt && last_nonopt != optind) |
486 |
exchange ((char **) argv); |
487 |
else if (first_nonopt == last_nonopt) |
488 |
first_nonopt = optind; |
489 |
last_nonopt = argc; |
490 |
|
491 |
optind = argc; |
492 |
} |
493 |
|
494 |
/* If we have done all the ARGV-elements, stop the scan |
495 |
and back over any non-options that we skipped and permuted. */ |
496 |
|
497 |
if (optind == argc) |
498 |
{ |
499 |
/* Set the next-arg-index to point at the non-options |
500 |
that we previously skipped, so the caller will digest them. */ |
501 |
if (first_nonopt != last_nonopt) |
502 |
optind = first_nonopt; |
503 |
return EOF; |
504 |
} |
505 |
|
506 |
/* If we have come to a non-option and did not permute it, |
507 |
either stop the scan or describe it to the caller and pass it by. */ |
508 |
|
509 |
if (NONOPTION_P) |
510 |
{ |
511 |
if (ordering == REQUIRE_ORDER) |
512 |
return EOF; |
513 |
optarg = argv[optind++]; |
514 |
return 1; |
515 |
} |
516 |
|
517 |
/* We have found another option-ARGV-element. |
518 |
Skip the initial punctuation. */ |
519 |
|
520 |
nextchar = (argv[optind] + 1 |
521 |
+ (longopts != NULL && argv[optind][1] == '-')); |
522 |
} |
523 |
|
524 |
/* Decode the current option-ARGV-element. */ |
525 |
|
526 |
/* Check whether the ARGV-element is a long option. |
527 |
|
528 |
If long_only and the ARGV-element has the form "-f", where f is |
529 |
a valid short option, don't consider it an abbreviated form of |
530 |
a long option that starts with f. Otherwise there would be no |
531 |
way to give the -f short option. |
532 |
|
533 |
On the other hand, if there's a long option "fubar" and |
534 |
the ARGV-element is "-fu", do consider that an abbreviation of |
535 |
the long option, just like "--fu", and not "-f" with arg "u". |
536 |
|
537 |
This distinction seems to be the most useful approach. */ |
538 |
|
539 |
if (longopts != NULL |
540 |
&& (argv[optind][1] == '-' |
541 |
|| (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1]))))) |
542 |
{ |
543 |
char *nameend; |
544 |
const struct option *p; |
545 |
const struct option *pfound = NULL; |
546 |
int exact = 0; |
547 |
int ambig = 0; |
548 |
int indfound = -1; |
549 |
int option_index; |
550 |
|
551 |
for (nameend = nextchar; *nameend && *nameend != '='; nameend++) |
552 |
/* Do nothing. */ ; |
553 |
|
554 |
/* Test all long options for either exact match |
555 |
or abbreviated matches. */ |
556 |
for (p = longopts, option_index = 0; p->name; p++, option_index++) |
557 |
if (!strncmp (p->name, nextchar, nameend - nextchar)) |
558 |
{ |
559 |
if ((unsigned int) (nameend - nextchar) |
560 |
== (unsigned int) strlen (p->name)) |
561 |
{ |
562 |
/* Exact match found. */ |
563 |
pfound = p; |
564 |
indfound = option_index; |
565 |
exact = 1; |
566 |
break; |
567 |
} |
568 |
else if (pfound == NULL) |
569 |
{ |
570 |
/* First nonexact match found. */ |
571 |
pfound = p; |
572 |
indfound = option_index; |
573 |
} |
574 |
else |
575 |
/* Second or later nonexact match found. */ |
576 |
ambig = 1; |
577 |
} |
578 |
|
579 |
if (ambig && !exact) |
580 |
{ |
581 |
if (opterr) |
582 |
fprintf (stderr, _("%s: option `%s' is ambiguous\n"), |
583 |
argv[0], argv[optind]); |
584 |
nextchar += strlen (nextchar); |
585 |
optind++; |
586 |
optopt = 0; |
587 |
return '?'; |
588 |
} |
589 |
|
590 |
if (pfound != NULL) |
591 |
{ |
592 |
option_index = indfound; |
593 |
optind++; |
594 |
if (*nameend) |
595 |
{ |
596 |
/* Don't test has_arg with >, because some C compilers don't |
597 |
allow it to be used on enums. */ |
598 |
if (pfound->has_arg) |
599 |
optarg = nameend + 1; |
600 |
else |
601 |
{ |
602 |
if (opterr) |
603 |
if (argv[optind - 1][1] == '-') |
604 |
/* --option */ |
605 |
fprintf (stderr, |
606 |
_("%s: option `--%s' doesn't allow an argument\n"), |
607 |
argv[0], pfound->name); |
608 |
else |
609 |
/* +option or -option */ |
610 |
fprintf (stderr, |
611 |
_("%s: option `%c%s' doesn't allow an argument\n"), |
612 |
argv[0], argv[optind - 1][0], pfound->name); |
613 |
|
614 |
nextchar += strlen (nextchar); |
615 |
|
616 |
optopt = pfound->val; |
617 |
return '?'; |
618 |
} |
619 |
} |
620 |
else if (pfound->has_arg == 1) |
621 |
{ |
622 |
if (optind < argc) |
623 |
optarg = argv[optind++]; |
624 |
else |
625 |
{ |
626 |
if (opterr) |
627 |
fprintf (stderr, |
628 |
_("%s: option `%s' requires an argument\n"), |
629 |
argv[0], argv[optind - 1]); |
630 |
nextchar += strlen (nextchar); |
631 |
optopt = pfound->val; |
632 |
return optstring[0] == ':' ? ':' : '?'; |
633 |
} |
634 |
} |
635 |
nextchar += strlen (nextchar); |
636 |
if (longind != NULL) |
637 |
*longind = option_index; |
638 |
if (pfound->flag) |
639 |
{ |
640 |
*(pfound->flag) = pfound->val; |
641 |
return 0; |
642 |
} |
643 |
return pfound->val; |
644 |
} |
645 |
|
646 |
/* Can't find it as a long option. If this is not getopt_long_only, |
647 |
or the option starts with '--' or is not a valid short |
648 |
option, then it's an error. |
649 |
Otherwise interpret it as a short option. */ |
650 |
if (!long_only || argv[optind][1] == '-' |
651 |
|| my_index (optstring, *nextchar) == NULL) |
652 |
{ |
653 |
if (opterr) |
654 |
{ |
655 |
if (argv[optind][1] == '-') |
656 |
/* --option */ |
657 |
fprintf (stderr, _("%s: unrecognized option `--%s'\n"), |
658 |
argv[0], nextchar); |
659 |
else |
660 |
/* +option or -option */ |
661 |
fprintf (stderr, _("%s: unrecognized option `%c%s'\n"), |
662 |
argv[0], argv[optind][0], nextchar); |
663 |
} |
664 |
nextchar = (char *) ""; |
665 |
optind++; |
666 |
optopt = 0; |
667 |
return '?'; |
668 |
} |
669 |
} |
670 |
|
671 |
/* Look at and handle the next short option-character. */ |
672 |
|
673 |
{ |
674 |
char c = *nextchar++; |
675 |
char *temp = my_index (optstring, c); |
676 |
|
677 |
/* Increment `optind' when we start to process its last character. */ |
678 |
if (*nextchar == '\0') |
679 |
++optind; |
680 |
|
681 |
if (temp == NULL || c == ':') |
682 |
{ |
683 |
if (opterr) |
684 |
{ |
685 |
if (posixly_correct) |
686 |
/* 1003.2 specifies the format of this message. */ |
687 |
fprintf (stderr, _("%s: illegal option -- %c\n"), |
688 |
argv[0], c); |
689 |
else |
690 |
fprintf (stderr, _("%s: invalid option -- %c\n"), |
691 |
argv[0], c); |
692 |
} |
693 |
optopt = c; |
694 |
return '?'; |
695 |
} |
696 |
/* Convenience. Treat POSIX -W foo same as long option --foo */ |
697 |
if (temp[0] == 'W' && temp[1] == ';') |
698 |
{ |
699 |
char *nameend; |
700 |
const struct option *p; |
701 |
const struct option *pfound = NULL; |
702 |
int exact = 0; |
703 |
int ambig = 0; |
704 |
int indfound = 0; |
705 |
int option_index; |
706 |
|
707 |
/* This is an option that requires an argument. */ |
708 |
if (*nextchar != '\0') |
709 |
{ |
710 |
optarg = nextchar; |
711 |
/* If we end this ARGV-element by taking the rest as an arg, |
712 |
we must advance to the next element now. */ |
713 |
optind++; |
714 |
} |
715 |
else if (optind == argc) |
716 |
{ |
717 |
if (opterr) |
718 |
{ |
719 |
/* 1003.2 specifies the format of this message. */ |
720 |
fprintf (stderr, |
721 |
gettext ("%s: option requires an argument -- %c\n"), |
722 |
argv[0], c); |
723 |
} |
724 |
optopt = c; |
725 |
if (optstring[0] == ':') |
726 |
c = ':'; |
727 |
else |
728 |
c = '?'; |
729 |
} |
730 |
else |
731 |
/* We already incremented `optind' once; |
732 |
increment it again when taking next ARGV-elt as argument. */ |
733 |
optarg = argv[optind++]; |
734 |
|
735 |
/* optarg is now the argument, see if it's in the |
736 |
table of longopts. */ |
737 |
|
738 |
for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++) |
739 |
/* Do nothing. */ ; |
740 |
|
741 |
/* Test all long options for either exact match |
742 |
or abbreviated matches. */ |
743 |
for (p = longopts, option_index = 0; p->name; p++, option_index++) |
744 |
if (!strncmp (p->name, nextchar, nameend - nextchar)) |
745 |
{ |
746 |
if ((unsigned int) (nameend - nextchar) == strlen (p->name)) |
747 |
{ |
748 |
/* Exact match found. */ |
749 |
pfound = p; |
750 |
indfound = option_index; |
751 |
exact = 1; |
752 |
break; |
753 |
} |
754 |
else if (pfound == NULL) |
755 |
{ |
756 |
/* First nonexact match found. */ |
757 |
pfound = p; |
758 |
indfound = option_index; |
759 |
} |
760 |
else |
761 |
/* Second or later nonexact match found. */ |
762 |
ambig = 1; |
763 |
} |
764 |
if (ambig && !exact) |
765 |
{ |
766 |
if (opterr) |
767 |
fprintf (stderr, gettext ("%s: option `-W %s' is ambiguous\n"), |
768 |
argv[0], argv[optind]); |
769 |
nextchar += strlen (nextchar); |
770 |
optind++; |
771 |
return '?'; |
772 |
} |
773 |
if (pfound != NULL) |
774 |
{ |
775 |
option_index = indfound; |
776 |
if (*nameend) |
777 |
{ |
778 |
/* Don't test has_arg with >, because some C compilers don't |
779 |
allow it to be used on enums. */ |
780 |
if (pfound->has_arg) |
781 |
optarg = nameend + 1; |
782 |
else |
783 |
{ |
784 |
if (opterr) |
785 |
fprintf (stderr, |
786 |
gettext ("%s: option `-W %s' doesn't allow an argument\n"), |
787 |
argv[0], pfound->name); |
788 |
|
789 |
nextchar += strlen (nextchar); |
790 |
return '?'; |
791 |
} |
792 |
} |
793 |
else if (pfound->has_arg == 1) |
794 |
{ |
795 |
if (optind < argc) |
796 |
optarg = argv[optind++]; |
797 |
else |
798 |
{ |
799 |
if (opterr) |
800 |
fprintf (stderr, |
801 |
gettext ("%s: option `%s' requires an argument\n"), |
802 |
argv[0], argv[optind - 1]); |
803 |
nextchar += strlen (nextchar); |
804 |
return optstring[0] == ':' ? ':' : '?'; |
805 |
} |
806 |
} |
807 |
nextchar += strlen (nextchar); |
808 |
if (longind != NULL) |
809 |
*longind = option_index; |
810 |
if (pfound->flag) |
811 |
{ |
812 |
*(pfound->flag) = pfound->val; |
813 |
return 0; |
814 |
} |
815 |
return pfound->val; |
816 |
} |
817 |
nextchar = NULL; |
818 |
return 'W'; /* Let the application handle it. */ |
819 |
} |
820 |
if (temp[1] == ':') |
821 |
{ |
822 |
if (temp[2] == ':') |
823 |
{ |
824 |
/* This is an option that accepts an argument optionally. */ |
825 |
if (*nextchar != '\0') |
826 |
{ |
827 |
optarg = nextchar; |
828 |
optind++; |
829 |
} |
830 |
else |
831 |
optarg = NULL; |
832 |
nextchar = NULL; |
833 |
} |
834 |
else |
835 |
{ |
836 |
/* This is an option that requires an argument. */ |
837 |
if (*nextchar != '\0') |
838 |
{ |
839 |
optarg = nextchar; |
840 |
/* If we end this ARGV-element by taking the rest as an arg, |
841 |
we must advance to the next element now. */ |
842 |
optind++; |
843 |
} |
844 |
else if (optind == argc) |
845 |
{ |
846 |
if (opterr) |
847 |
{ |
848 |
/* 1003.2 specifies the format of this message. */ |
849 |
fprintf (stderr, |
850 |
_("%s: option requires an argument -- %c\n"), |
851 |
argv[0], c); |
852 |
} |
853 |
optopt = c; |
854 |
if (optstring[0] == ':') |
855 |
c = ':'; |
856 |
else |
857 |
c = '?'; |
858 |
} |
859 |
else |
860 |
/* We already incremented `optind' once; |
861 |
increment it again when taking next ARGV-elt as argument. */ |
862 |
optarg = argv[optind++]; |
863 |
nextchar = NULL; |
864 |
} |
865 |
} |
866 |
return c; |
867 |
} |
868 |
} |
869 |
|
870 |
int |
871 |
getopt (argc, argv, optstring) |
872 |
int argc; |
873 |
char *const *argv; |
874 |
const char *optstring; |
875 |
{ |
876 |
return _getopt_internal (argc, argv, optstring, |
877 |
(const struct option *) 0, |
878 |
(int *) 0, |
879 |
0); |
880 |
} |
881 |
|
882 |
#endif /* _LIBC or not __GNU_LIBRARY__. */ |
883 |
|
884 |
#ifdef TEST |
885 |
|
886 |
/* Compile with -DTEST to make an executable for use in testing |
887 |
the above definition of `getopt'. */ |
888 |
|
889 |
int |
890 |
main (argc, argv) |
891 |
int argc; |
892 |
char **argv; |
893 |
{ |
894 |
int c; |
895 |
int digit_optind = 0; |
896 |
|
897 |
while (1) |
898 |
{ |
899 |
int this_option_optind = optind ? optind : 1; |
900 |
|
901 |
c = getopt (argc, argv, "abc:d:0123456789"); |
902 |
if (c == EOF) |
903 |
break; |
904 |
|
905 |
switch (c) |
906 |
{ |
907 |
case '0': |
908 |
case '1': |
909 |
case '2': |
910 |
case '3': |
911 |
case '4': |
912 |
case '5': |
913 |
case '6': |
914 |
case '7': |
915 |
case '8': |
916 |
case '9': |
917 |
if (digit_optind != 0 && digit_optind != this_option_optind) |
918 |
printf ("digits occur in two different argv-elements.\n"); |
919 |
digit_optind = this_option_optind; |
920 |
printf ("option %c\n", c); |
921 |
break; |
922 |
|
923 |
case 'a': |
924 |
printf ("option a\n"); |
925 |
break; |
926 |
|
927 |
case 'b': |
928 |
printf ("option b\n"); |
929 |
break; |
930 |
|
931 |
case 'c': |
932 |
printf ("option c with value `%s'\n", optarg); |
933 |
break; |
934 |
|
935 |
case '?': |
936 |
break; |
937 |
|
938 |
default: |
939 |
printf ("?? getopt returned character code 0%o ??\n", c); |
940 |
} |
941 |
} |
942 |
|
943 |
if (optind < argc) |
944 |
{ |
945 |
printf ("non-option ARGV-elements: "); |
946 |
while (optind < argc) |
947 |
printf ("%s ", argv[optind++]); |
948 |
printf ("\n"); |
949 |
} |
950 |
|
951 |
exit (0); |
952 |
} |
953 |
|
954 |
#endif /* TEST */ |