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- Committer: Bazaar Package Importer
- Author(s): Brian Mays
- Date: 2002-03-20 11:21:15 UTC
- Revision ID: james.westby@ubuntu.com-20020320112115-whl7m242ig71nu3h
Tags: upstream-2.02
Import upstream version 2.02
- files added:
- intl
- lib
- man
- po
- src
added
removed
lib/getopt.c
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
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 not,
24
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
25
Boston, MA 02111-1307, 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
#define GETOPT_INTERFACE_VERSION 2
56
#if !defined (_LIBC) && defined (__GLIBC__) && __GLIBC__ >= 2
57
#include <gnu-versions.h>
58
#if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
59
#define ELIDE_CODE
60
#endif
61
#endif
62
63
#ifndef ELIDE_CODE
64
65
66
/* This needs to come after some library #include
67
to get __GNU_LIBRARY__ defined. */
68
#ifdef __GNU_LIBRARY__
69
/* Don't include stdlib.h for non-GNU C libraries because some of them
70
contain conflicting prototypes for getopt. */
71
#include <stdlib.h>
72
#include <unistd.h>
73
#endif /* GNU C library. */
74
75
#ifdef VMS
76
#include <unixlib.h>
77
#if HAVE_STRING_H - 0
78
#include <string.h>
79
#endif
80
#endif
81
82
#if defined (WIN32) && !defined (__CYGWIN32__)
83
/* It's not Unix, really. See? Capital letters. */
84
#include <windows.h>
85
#define getpid() GetCurrentProcessId()
86
#endif
87
88
#ifndef _
89
/* This is for other GNU distributions with internationalized messages.
90
When compiling libc, the _ macro is predefined. */
91
#ifdef HAVE_LIBINTL_H
92
# include <libintl.h>
93
# define _(msgid) gettext (msgid)
94
#else
95
# define _(msgid) (msgid)
96
#endif
97
#endif
98
99
/* This version of `getopt' appears to the caller like standard Unix `getopt'
100
but it behaves differently for the user, since it allows the user
101
to intersperse the options with the other arguments.
102
103
As `getopt' works, it permutes the elements of ARGV so that,
104
when it is done, all the options precede everything else. Thus
105
all application programs are extended to handle flexible argument order.
106
107
Setting the environment variable POSIXLY_CORRECT disables permutation.
108
Then the behavior is completely standard.
109
110
GNU application programs can use a third alternative mode in which
111
they can distinguish the relative order of options and other arguments. */
112
113
#include "getopt.h"
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
char *optarg = 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, `optind' 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
int optind = 1;
137
138
/* Formerly, initialization of getopt depended on optind==0, which
139
causes problems with re-calling getopt as programs generally don't
140
know that. */
141
142
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
int opterr = 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
int optopt = '?';
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 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 options 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 `optind' != 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
static const char *nonoption_flags;
257
static int nonoption_flags_len;
258
259
static int original_argc;
260
static char *const *original_argv;
261
262
/* Make sure the environment variable bash 2.0 puts in the environment
263
is valid for the getopt call we must make sure that the ARGV passed
264
to getopt is that one passed to the process. */
265
static void store_args (int argc, char *const *argv) __attribute__ ((unused));
266
static void
267
store_args (int argc, char *const *argv)
268
{
269
/* XXX This is no good solution. We should rather copy the args so
270
that we can compare them later. But we must not use malloc(3). */
271
original_argc = argc;
272
original_argv = argv;
273
}
274
text_set_element (__libc_subinit, store_args);
275
#endif
276
277
/* Exchange two adjacent subsequences of ARGV.
278
One subsequence is elements [first_nonopt,last_nonopt)
279
which contains all the non-options that have been skipped so far.
280
The other is elements [last_nonopt,optind), which contains all
281
the options processed since those non-options were skipped.
282
283
`first_nonopt' and `last_nonopt' are relocated so that they describe
284
the new indices of the non-options in ARGV after they are moved. */
285
286
#if defined (__STDC__) && __STDC__
287
static void exchange (char **);
288
#endif
289
290
static void
291
exchange (argv)
292
char **argv;
293
{
294
int bottom = first_nonopt;
295
int middle = last_nonopt;
296
int top = optind;
297
char *tem;
298
299
/* Exchange the shorter segment with the far end of the longer segment.
300
That puts the shorter segment into the right place.
301
It leaves the longer segment in the right place overall,
302
but it consists of two parts that need to be swapped next. */
303
304
while (top > middle && middle > bottom)
305
{
306
if (top - middle > middle - bottom)
307
{
308
/* Bottom segment is the short one. */
309
int len = middle - bottom;
310
register int i;
311
312
/* Swap it with the top part of the top segment. */
313
for (i = 0; i < len; i++)
314
{
315
tem = argv[bottom + i];
316
argv[bottom + i] = argv[top - (middle - bottom) + i];
317
argv[top - (middle - bottom) + i] = tem;
318
}
319
/* Exclude the moved bottom segment from further swapping. */
320
top -= len;
321
}
322
else
323
{
324
/* Top segment is the short one. */
325
int len = top - middle;
326
register int i;
327
328
/* Swap it with the bottom part of the bottom segment. */
329
for (i = 0; i < len; i++)
330
{
331
tem = argv[bottom + i];
332
argv[bottom + i] = argv[middle + i];
333
argv[middle + i] = tem;
334
}
335
/* Exclude the moved top segment from further swapping. */
336
bottom += len;
337
}
338
}
339
340
/* Update records for the slots the non-options now occupy. */
341
342
first_nonopt += (optind - last_nonopt);
343
last_nonopt = optind;
344
}
345
346
/* Initialize the internal data when the first call is made. */
347
348
#if defined (__STDC__) && __STDC__
349
static const char *_getopt_initialize (int, char *const *, const char *);
350
#endif
351
static const char *
352
_getopt_initialize (argc, argv, optstring)
353
int argc;
354
char *const *argv;
355
const char *optstring;
356
{
357
/* Start processing options with ARGV-element 1 (since ARGV-element 0
358
is the program name); the sequence of previously skipped
359
non-option ARGV-elements is empty. */
360
361
first_nonopt = last_nonopt = optind = 1;
362
363
nextchar = NULL;
364
365
posixly_correct = getenv ("POSIXLY_CORRECT");
366
367
/* Determine how to handle the ordering of options and nonoptions. */
368
369
if (optstring[0] == '-')
370
{
371
ordering = RETURN_IN_ORDER;
372
++optstring;
373
}
374
else if (optstring[0] == '+')
375
{
376
ordering = REQUIRE_ORDER;
377
++optstring;
378
}
379
else if (posixly_correct != NULL)
380
ordering = REQUIRE_ORDER;
381
else
382
ordering = PERMUTE;
383
384
#ifdef _LIBC
385
if (posixly_correct == NULL
386
&& argc == original_argc && argv == original_argv)
387
{
388
/* Bash 2.0 puts a special variable in the environment for each
389
command it runs, specifying which ARGV elements are the results of
390
file name wildcard expansion and therefore should not be
391
considered as options. */
392
char var[100];
393
sprintf (var, "_%d_GNU_nonoption_argv_flags_", getpid ());
394
nonoption_flags = getenv (var);
395
if (nonoption_flags == NULL)
396
nonoption_flags_len = 0;
397
else
398
nonoption_flags_len = strlen (nonoption_flags);
399
}
400
else
401
nonoption_flags_len = 0;
402
#endif
403
404
return optstring;
405
}
406
407
/* Scan elements of ARGV (whose length is ARGC) for option characters
408
given in OPTSTRING.
409
410
If an element of ARGV starts with '-', and is not exactly "-" or "--",
411
then it is an option element. The characters of this element
412
(aside from the initial '-') are option characters. If `getopt'
413
is called repeatedly, it returns successively each of the option characters
414
from each of the option elements.
415
416
If `getopt' finds another option character, it returns that character,
417
updating `optind' and `nextchar' so that the next call to `getopt' can
418
resume the scan with the following option character or ARGV-element.
419
420
If there are no more option characters, `getopt' returns -1.
421
Then `optind' is the index in ARGV of the first ARGV-element
422
that is not an option. (The ARGV-elements have been permuted
423
so that those that are not options now come last.)
424
425
OPTSTRING is a string containing the legitimate option characters.
426
If an option character is seen that is not listed in OPTSTRING,
427
return '?' after printing an error message. If you set `opterr' to
428
zero, the error message is suppressed but we still return '?'.
429
430
If a char in OPTSTRING is followed by a colon, that means it wants an arg,
431
so the following text in the same ARGV-element, or the text of the following
432
ARGV-element, is returned in `optarg'. Two colons mean an option that
433
wants an optional arg; if there is text in the current ARGV-element,
434
it is returned in `optarg', otherwise `optarg' is set to zero.
435
436
If OPTSTRING starts with `-' or `+', it requests different methods of
437
handling the non-option ARGV-elements.
438
See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
439
440
Long-named options begin with `--' instead of `-'.
441
Their names may be abbreviated as long as the abbreviation is unique
442
or is an exact match for some defined option. If they have an
443
argument, it follows the option name in the same ARGV-element, separated
444
from the option name by a `=', or else the in next ARGV-element.
445
When `getopt' finds a long-named option, it returns 0 if that option's
446
`flag' field is nonzero, the value of the option's `val' field
447
if the `flag' field is zero.
448
449
The elements of ARGV aren't really const, because we permute them.
450
But we pretend they're const in the prototype to be compatible
451
with other systems.
452
453
LONGOPTS is a vector of `struct option' terminated by an
454
element containing a name which is zero.
455
456
LONGIND returns the index in LONGOPT of the long-named option found.
457
It is only valid when a long-named option has been found by the most
458
recent call.
459
460
If LONG_ONLY is nonzero, '-' as well as '--' can introduce
461
long-named options. */
462
463
int
464
_getopt_internal (argc, argv, optstring, longopts, longind, long_only)
465
int argc;
466
char *const *argv;
467
const char *optstring;
468
const struct option *longopts;
469
int *longind;
470
int long_only;
471
{
472
optarg = NULL;
473
474
if (!__getopt_initialized || optind == 0)
475
{
476
optstring = _getopt_initialize (argc, argv, optstring);
477
optind = 1; /* Don't scan ARGV[0], the program name. */
478
__getopt_initialized = 1;
479
}
480
481
/* Test whether ARGV[optind] points to a non-option argument.
482
Either it does not have option syntax, or there is an environment flag
483
from the shell indicating it is not an option. The later information
484
is only used when the used in the GNU libc. */
485
#ifdef _LIBC
486
#define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \
487
|| (optind < nonoption_flags_len \
488
&& nonoption_flags[optind] == '1'))
489
#else
490
#define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0')
491
#endif
492
493
if (nextchar == NULL || *nextchar == '\0')
494
{
495
/* Advance to the next ARGV-element. */
496
497
/* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been
498
moved back by the user (who may also have changed the arguments). */
499
if (last_nonopt > optind)
500
last_nonopt = optind;
501
if (first_nonopt > optind)
502
first_nonopt = optind;
503
504
if (ordering == PERMUTE)
505
{
506
/* If we have just processed some options following some non-options,
507
exchange them so that the options come first. */
508
509
if (first_nonopt != last_nonopt && last_nonopt != optind)
510
exchange ((char **) argv);
511
else if (last_nonopt != optind)
512
first_nonopt = optind;
513
514
/* Skip any additional non-options
515
and extend the range of non-options previously skipped. */
516
517
while (optind < argc && NONOPTION_P)
518
optind++;
519
last_nonopt = optind;
520
}
521
522
/* The special ARGV-element `--' means premature end of options.
523
Skip it like a null option,
524
then exchange with previous non-options as if it were an option,
525
then skip everything else like a non-option. */
526
527
if (optind != argc && !strcmp (argv[optind], "--"))
528
{
529
optind++;
530
531
if (first_nonopt != last_nonopt && last_nonopt != optind)
532
exchange ((char **) argv);
533
else if (first_nonopt == last_nonopt)
534
first_nonopt = optind;
535
last_nonopt = argc;
536
537
optind = argc;
538
}
539
540
/* If we have done all the ARGV-elements, stop the scan
541
and back over any non-options that we skipped and permuted. */
542
543
if (optind == argc)
544
{
545
/* Set the next-arg-index to point at the non-options
546
that we previously skipped, so the caller will digest them. */
547
if (first_nonopt != last_nonopt)
548
optind = first_nonopt;
549
return -1;
550
}
551
552
/* If we have come to a non-option and did not permute it,
553
either stop the scan or describe it to the caller and pass it by. */
554
555
if (NONOPTION_P)
556
{
557
if (ordering == REQUIRE_ORDER)
558
return -1;
559
optarg = argv[optind++];
560
return 1;
561
}
562
563
/* We have found another option-ARGV-element.
564
Skip the initial punctuation. */
565
566
nextchar = (argv[optind] + 1
567
+ (longopts != NULL && argv[optind][1] == '-'));
568
}
569
570
/* Decode the current option-ARGV-element. */
571
572
/* Check whether the ARGV-element is a long option.
573
574
If long_only and the ARGV-element has the form "-f", where f is
575
a valid short option, don't consider it an abbreviated form of
576
a long option that starts with f. Otherwise there would be no
577
way to give the -f short option.
578
579
On the other hand, if there's a long option "fubar" and
580
the ARGV-element is "-fu", do consider that an abbreviation of
581
the long option, just like "--fu", and not "-f" with arg "u".
582
583
This distinction seems to be the most useful approach. */
584
585
if (longopts != NULL
586
&& (argv[optind][1] == '-'
587
|| (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1])))))
588
{
589
char *nameend;
590
const struct option *p;
591
const struct option *pfound = NULL;
592
int exact = 0;
593
int ambig = 0;
594
int indfound = -1;
595
int option_index;
596
597
for (nameend = nextchar; *nameend && *nameend != '='; nameend++)
598
/* Do nothing. */ ;
599
600
/* Test all long options for either exact match
601
or abbreviated matches. */
602
for (p = longopts, option_index = 0; p->name; p++, option_index++)
603
if (!strncmp (p->name, nextchar, nameend - nextchar))
604
{
605
if ((unsigned int) (nameend - nextchar)
606
== (unsigned int) strlen (p->name))
607
{
608
/* Exact match found. */
609
pfound = p;
610
indfound = option_index;
611
exact = 1;
612
break;
613
}
614
else if (pfound == NULL)
615
{
616
/* First nonexact match found. */
617
pfound = p;
618
indfound = option_index;
619
}
620
else
621
/* Second or later nonexact match found. */
622
ambig = 1;
623
}
624
625
if (ambig && !exact)
626
{
627
if (opterr)
628
fprintf (stderr, _("%s: option `%s' is ambiguous\n"),
629
argv[0], argv[optind]);
630
nextchar += strlen (nextchar);
631
optind++;
632
optopt = 0;
633
return '?';
634
}
635
636
if (pfound != NULL)
637
{
638
option_index = indfound;
639
optind++;
640
if (*nameend)
641
{
642
/* Don't test has_arg with >, because some C compilers don't
643
allow it to be used on enums. */
644
if (pfound->has_arg)
645
optarg = nameend + 1;
646
else
647
{
648
if (opterr)
649
if (argv[optind - 1][1] == '-')
650
/* --option */
651
fprintf (stderr,
652
_("%s: option `--%s' doesn't allow an argument\n"),
653
argv[0], pfound->name);
654
else
655
/* +option or -option */
656
fprintf (stderr,
657
_("%s: option `%c%s' doesn't allow an argument\n"),
658
argv[0], argv[optind - 1][0], pfound->name);
659
660
nextchar += strlen (nextchar);
661
662
optopt = pfound->val;
663
return '?';
664
}
665
}
666
else if (pfound->has_arg == 1)
667
{
668
if (optind < argc)
669
optarg = argv[optind++];
670
else
671
{
672
if (opterr)
673
fprintf (stderr,
674
_("%s: option `%s' requires an argument\n"),
675
argv[0], argv[optind - 1]);
676
nextchar += strlen (nextchar);
677
optopt = pfound->val;
678
return optstring[0] == ':' ? ':' : '?';
679
}
680
}
681
nextchar += strlen (nextchar);
682
if (longind != NULL)
683
*longind = option_index;
684
if (pfound->flag)
685
{
686
*(pfound->flag) = pfound->val;
687
return 0;
688
}
689
return pfound->val;
690
}
691
692
/* Can't find it as a long option. If this is not getopt_long_only,
693
or the option starts with '--' or is not a valid short
694
option, then it's an error.
695
Otherwise interpret it as a short option. */
696
if (!long_only || argv[optind][1] == '-'
697
|| my_index (optstring, *nextchar) == NULL)
698
{
699
if (opterr)
700
{
701
if (argv[optind][1] == '-')
702
/* --option */
703
fprintf (stderr, _("%s: unrecognized option `--%s'\n"),
704
argv[0], nextchar);
705
else
706
/* +option or -option */
707
fprintf (stderr, _("%s: unrecognized option `%c%s'\n"),
708
argv[0], argv[optind][0], nextchar);
709
}
710
nextchar = (char *) "";
711
optind++;
712
optopt = 0;
713
return '?';
714
}
715
}
716
717
/* Look at and handle the next short option-character. */
718
719
{
720
char c = *nextchar++;
721
char *temp = my_index (optstring, c);
722
723
/* Increment `optind' when we start to process its last character. */
724
if (*nextchar == '\0')
725
++optind;
726
727
if (temp == NULL || c == ':')
728
{
729
if (opterr)
730
{
731
if (posixly_correct)
732
/* 1003.2 specifies the format of this message. */
733
fprintf (stderr, _("%s: illegal option -- %c\n"),
734
argv[0], c);
735
else
736
fprintf (stderr, _("%s: invalid option -- %c\n"),
737
argv[0], c);
738
}
739
optopt = c;
740
return '?';
741
}
742
/* Convenience. Treat POSIX -W foo same as long option --foo */
743
if (temp[0] == 'W' && temp[1] == ';')
744
{
745
char *nameend;
746
const struct option *p;
747
const struct option *pfound = NULL;
748
int exact = 0;
749
int ambig = 0;
750
int indfound = 0;
751
int option_index;
752
753
/* This is an option that requires an argument. */
754
if (*nextchar != '\0')
755
{
756
optarg = nextchar;
757
/* If we end this ARGV-element by taking the rest as an arg,
758
we must advance to the next element now. */
759
optind++;
760
}
761
else if (optind == argc)
762
{
763
if (opterr)
764
{
765
/* 1003.2 specifies the format of this message. */
766
fprintf (stderr, _("%s: option requires an argument -- %c\n"),
767
argv[0], c);
768
}
769
optopt = c;
770
if (optstring[0] == ':')
771
c = ':';
772
else
773
c = '?';
774
return c;
775
}
776
else
777
/* We already incremented `optind' once;
778
increment it again when taking next ARGV-elt as argument. */
779
optarg = argv[optind++];
780
781
/* optarg is now the argument, see if it's in the
782
table of longopts. */
783
784
for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++)
785
/* Do nothing. */ ;
786
787
/* Test all long options for either exact match
788
or abbreviated matches. */
789
for (p = longopts, option_index = 0; p->name; p++, option_index++)
790
if (!strncmp (p->name, nextchar, nameend - nextchar))
791
{
792
if ((unsigned int) (nameend - nextchar) == strlen (p->name))
793
{
794
/* Exact match found. */
795
pfound = p;
796
indfound = option_index;
797
exact = 1;
798
break;
799
}
800
else if (pfound == NULL)
801
{
802
/* First nonexact match found. */
803
pfound = p;
804
indfound = option_index;
805
}
806
else
807
/* Second or later nonexact match found. */
808
ambig = 1;
809
}
810
if (ambig && !exact)
811
{
812
if (opterr)
813
fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"),
814
argv[0], argv[optind]);
815
nextchar += strlen (nextchar);
816
optind++;
817
return '?';
818
}
819
if (pfound != NULL)
820
{
821
option_index = indfound;
822
if (*nameend)
823
{
824
/* Don't test has_arg with >, because some C compilers don't
825
allow it to be used on enums. */
826
if (pfound->has_arg)
827
optarg = nameend + 1;
828
else
829
{
830
if (opterr)
831
fprintf (stderr, _("\
832
%s: option `-W %s' doesn't allow an argument\n"),
833
argv[0], pfound->name);
834
835
nextchar += strlen (nextchar);
836
return '?';
837
}
838
}
839
else if (pfound->has_arg == 1)
840
{
841
if (optind < argc)
842
optarg = argv[optind++];
843
else
844
{
845
if (opterr)
846
fprintf (stderr,
847
_("%s: option `%s' requires an argument\n"),
848
argv[0], argv[optind - 1]);
849
nextchar += strlen (nextchar);
850
return optstring[0] == ':' ? ':' : '?';
851
}
852
}
853
nextchar += strlen (nextchar);
854
if (longind != NULL)
855
*longind = option_index;
856
if (pfound->flag)
857
{
858
*(pfound->flag) = pfound->val;
859
return 0;
860
}
861
return pfound->val;
862
}
863
nextchar = NULL;
864
return 'W'; /* Let the application handle it. */
865
}
866
if (temp[1] == ':')
867
{
868
if (temp[2] == ':')
869
{
870
/* This is an option that accepts an argument optionally. */
871
if (*nextchar != '\0')
872
{
873
optarg = nextchar;
874
optind++;
875
}
876
else
877
optarg = NULL;
878
nextchar = NULL;
879
}
880
else
881
{
882
/* This is an option that requires an argument. */
883
if (*nextchar != '\0')
884
{
885
optarg = nextchar;
886
/* If we end this ARGV-element by taking the rest as an arg,
887
we must advance to the next element now. */
888
optind++;
889
}
890
else if (optind == argc)
891
{
892
if (opterr)
893
{
894
/* 1003.2 specifies the format of this message. */
895
fprintf (stderr,
896
_("%s: option requires an argument -- %c\n"),
897
argv[0], c);
898
}
899
optopt = c;
900
if (optstring[0] == ':')
901
c = ':';
902
else
903
c = '?';
904
}
905
else
906
/* We already incremented `optind' once;
907
increment it again when taking next ARGV-elt as argument. */
908
optarg = argv[optind++];
909
nextchar = NULL;
910
}
911
}
912
return c;
913
}
914
}
915
916
int
917
getopt (argc, argv, optstring)
918
int argc;
919
char *const *argv;
920
const char *optstring;
921
{
922
return _getopt_internal (argc, argv, optstring,
923
(const struct option *) 0,
924
(int *) 0,
925
0);
926
}
927
928
#endif /* Not ELIDE_CODE. */
929
930
#ifdef TEST
931
932
/* Compile with -DTEST to make an executable for use in testing
933
the above definition of `getopt'. */
934
935
int
936
main (argc, argv)
937
int argc;
938
char **argv;
939
{
940
int c;
941
int digit_optind = 0;
942
943
while (1)
944
{
945
int this_option_optind = optind ? optind : 1;
946
947
c = getopt (argc, argv, "abc:d:0123456789");
948
if (c == -1)
949
break;
950
951
switch (c)
952
{
953
case '0':
954
case '1':
955
case '2':
956
case '3':
957
case '4':
958
case '5':
959
case '6':
960
case '7':
961
case '8':
962
case '9':
963
if (digit_optind != 0 && digit_optind != this_option_optind)
964
printf ("digits occur in two different argv-elements.\n");
965
digit_optind = this_option_optind;
966
printf ("option %c\n", c);
967
break;
968
969
case 'a':
970
printf ("option a\n");
971
break;
972
973
case 'b':
974
printf ("option b\n");
975
break;
976
977
case 'c':
978
printf ("option c with value `%s'\n", optarg);
979
break;
980
981
case '?':
982
break;
983
984
default:
985
printf ("?? getopt returned character code 0%o ??\n", c);
986
}
987
}
988
989
if (optind < argc)
990
{
991
printf ("non-option ARGV-elements: ");
992
while (optind < argc)
993
printf ("%s ", argv[optind++]);
994
printf ("\n");
995
}
996
997
exit (0);
998
}
999
1000
#endif /* TEST */
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Version: 2.0.1