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- Committer: Bazaar Package Importer
- Author(s): Philipp Frauenfelder
- Date: 2001-07-20 06:25:02 UTC
- Revision ID: james.westby@ubuntu.com-20010720062502-i6wp3q655zs76tdm
Tags: upstream-1.05
Import upstream version 1.05
added
removed
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
The GNU C Library is free software; you can redistribute it and/or
10
modify it under the terms of the GNU Library General Public License as
11
published by the Free Software Foundation; either version 2 of the
12
License, or (at your option) any later version.
13
14
The GNU C Library is distributed in the hope that it will be useful,
15
but WITHOUT ANY WARRANTY; without even the implied warranty of
16
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17
Library General Public License for more details.
18
19
You should have received a copy of the GNU Library General Public
20
License along with the GNU C Library; see the file COPYING.LIB. If not,
21
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
22
Boston, MA 02111-1307, USA. */
23
24
/* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>.
25
Ditto for AIX 3.2 and <stdlib.h>. */
26
#ifndef _NO_PROTO
27
#define _NO_PROTO
28
#endif
29
30
#ifdef HAVE_CONFIG_H
31
#include <config.h>
32
#endif
33
34
#if !defined (__STDC__) || !__STDC__
35
/* This is a separate conditional since some stdc systems
36
reject `defined (const)'. */
37
#ifndef const
38
#define const
39
#endif
40
#endif
41
42
#include <stdio.h>
43
44
/* Comment out all this code if we are using the GNU C Library, and are not
45
actually compiling the library itself. This code is part of the GNU C
46
Library, but also included in many other GNU distributions. Compiling
47
and linking in this code is a waste when using the GNU C library
48
(especially if it is a shared library). Rather than having every GNU
49
program understand `configure --with-gnu-libc' and omit the object files,
50
it is simpler to just do this in the source for each such file. */
51
52
#define GETOPT_INTERFACE_VERSION 2
53
#if !defined (_LIBC) && defined (__GLIBC__) && __GLIBC__ >= 2
54
#include <gnu-versions.h>
55
#if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
56
#define ELIDE_CODE
57
#endif
58
#endif
59
60
#ifndef ELIDE_CODE
61
62
63
/* This needs to come after some library #include
64
to get __GNU_LIBRARY__ defined. */
65
#ifdef __GNU_LIBRARY__
66
/* Don't include stdlib.h for non-GNU C libraries because some of them
67
contain conflicting prototypes for getopt. */
68
#include <stdlib.h>
69
#include <unistd.h>
70
#endif /* GNU C library. */
71
72
#ifdef VMS
73
#include <unixlib.h>
74
#if HAVE_STRING_H - 0
75
#include <string.h>
76
#endif
77
#endif
78
79
#if defined (WIN32) && !defined (__CYGWIN32__)
80
/* It's not Unix, really. See? Capital letters. */
81
#include <windows.h>
82
#define getpid() GetCurrentProcessId()
83
#endif
84
85
#ifndef _
86
/* This is for other GNU distributions with internationalized messages.
87
When compiling libc, the _ macro is predefined. */
88
#ifdef HAVE_LIBINTL_H
89
# include <libintl.h>
90
# define _(msgid) gettext (msgid)
91
#else
92
# define _(msgid) (msgid)
93
#endif
94
#endif
95
96
/* This version of `getopt' appears to the caller like standard Unix `getopt'
97
but it behaves differently for the user, since it allows the user
98
to intersperse the options with the other arguments.
99
100
As `getopt' works, it permutes the elements of ARGV so that,
101
when it is done, all the options precede everything else. Thus
102
all application programs are extended to handle flexible argument order.
103
104
Setting the environment variable POSIXLY_CORRECT disables permutation.
105
Then the behavior is completely standard.
106
107
GNU application programs can use a third alternative mode in which
108
they can distinguish the relative order of options and other arguments. */
109
110
#include "getopt.h"
111
112
/* For communication from `getopt' to the caller.
113
When `getopt' finds an option that takes an argument,
114
the argument value is returned here.
115
Also, when `ordering' is RETURN_IN_ORDER,
116
each non-option ARGV-element is returned here. */
117
118
char *optarg = NULL;
119
120
/* Index in ARGV of the next element to be scanned.
121
This is used for communication to and from the caller
122
and for communication between successive calls to `getopt'.
123
124
On entry to `getopt', zero means this is the first call; initialize.
125
126
When `getopt' returns -1, this is the index of the first of the
127
non-option elements that the caller should itself scan.
128
129
Otherwise, `optind' communicates from one call to the next
130
how much of ARGV has been scanned so far. */
131
132
/* 1003.2 says this must be 1 before any call. */
133
int optind = 1;
134
135
/* Formerly, initialization of getopt depended on optind==0, which
136
causes problems with re-calling getopt as programs generally don't
137
know that. */
138
139
int __getopt_initialized = 0;
140
141
/* The next char to be scanned in the option-element
142
in which the last option character we returned was found.
143
This allows us to pick up the scan where we left off.
144
145
If this is zero, or a null string, it means resume the scan
146
by advancing to the next ARGV-element. */
147
148
static char *nextchar;
149
150
/* Callers store zero here to inhibit the error message
151
for unrecognized options. */
152
153
int opterr = 1;
154
155
/* Set to an option character which was unrecognized.
156
This must be initialized on some systems to avoid linking in the
157
system's own getopt implementation. */
158
159
int optopt = '?';
160
161
/* Describe how to deal with options that follow non-option ARGV-elements.
162
163
If the caller did not specify anything,
164
the default is REQUIRE_ORDER if the environment variable
165
POSIXLY_CORRECT is defined, PERMUTE otherwise.
166
167
REQUIRE_ORDER means don't recognize them as options;
168
stop option processing when the first non-option is seen.
169
This is what Unix does.
170
This mode of operation is selected by either setting the environment
171
variable POSIXLY_CORRECT, or using `+' as the first character
172
of the list of option characters.
173
174
PERMUTE is the default. We permute the contents of ARGV as we scan,
175
so that eventually all the non-options are at the end. This allows options
176
to be given in any order, even with programs that were not written to
177
expect this.
178
179
RETURN_IN_ORDER is an option available to programs that were written
180
to expect options and other ARGV-elements in any order and that care about
181
the ordering of the two. We describe each non-option ARGV-element
182
as if it were the argument of an option with character code 1.
183
Using `-' as the first character of the list of option characters
184
selects this mode of operation.
185
186
The special argument `--' forces an end of option-scanning regardless
187
of the value of `ordering'. In the case of RETURN_IN_ORDER, only
188
`--' can cause `getopt' to return -1 with `optind' != ARGC. */
189
190
static enum
191
{
192
REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
193
} ordering;
194
195
/* Value of POSIXLY_CORRECT environment variable. */
196
static char *posixly_correct;
197
198
#ifdef __GNU_LIBRARY__
199
/* We want to avoid inclusion of string.h with non-GNU libraries
200
because there are many ways it can cause trouble.
201
On some systems, it contains special magic macros that don't work
202
in GCC. */
203
#include <string.h>
204
#define my_index strchr
205
#else
206
207
/* Avoid depending on library functions or files
208
whose names are inconsistent. */
209
210
char *getenv ();
211
extern int strncmp(const char *s1, const char *s2, size_t len);
212
213
static char *
214
my_index (str, chr)
215
const char *str;
216
int chr;
217
{
218
while (*str)
219
{
220
if (*str == chr)
221
return (char *) str;
222
str++;
223
}
224
return 0;
225
}
226
227
/* If using GCC, we can safely declare strlen this way.
228
If not using GCC, it is ok not to declare it. */
229
#ifdef __GNUC__
230
/* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h.
231
That was relevant to code that was here before. */
232
#if !defined (__STDC__) || !__STDC__
233
/* gcc with -traditional declares the built-in strlen to return int,
234
and has done so at least since version 2.4.5. -- rms. */
235
extern int strlen (const char *);
236
#endif /* not __STDC__ */
237
#endif /* __GNUC__ */
238
239
#endif /* not __GNU_LIBRARY__ */
240
241
/* Handle permutation of arguments. */
242
243
/* Describe the part of ARGV that contains non-options that have
244
been skipped. `first_nonopt' is the index in ARGV of the first of them;
245
`last_nonopt' is the index after the last of them. */
246
247
static int first_nonopt;
248
static int last_nonopt;
249
250
#ifdef _LIBC
251
/* Bash 2.0 gives us an environment variable containing flags
252
indicating ARGV elements that should not be considered arguments. */
253
254
/* Defined in getopt_init.c */
255
extern char *__getopt_nonoption_flags;
256
257
static int nonoption_flags_max_len;
258
static int nonoption_flags_len;
259
260
static int original_argc;
261
static char *const *original_argv;
262
263
extern pid_t __libc_pid;
264
265
/* Make sure the environment variable bash 2.0 puts in the environment
266
is valid for the getopt call we must make sure that the ARGV passed
267
to getopt is that one passed to the process. */
268
static void
269
__attribute__ ((unused))
270
store_args_and_env (int argc, char *const *argv)
271
{
272
/* XXX This is no good solution. We should rather copy the args so
273
that we can compare them later. But we must not use malloc(3). */
274
original_argc = argc;
275
original_argv = argv;
276
}
277
text_set_element (__libc_subinit, store_args_and_env);
278
279
# define SWAP_FLAGS(ch1, ch2) \
280
if (nonoption_flags_len > 0) \
281
{ \
282
char __tmp = __getopt_nonoption_flags[ch1]; \
283
__getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \
284
__getopt_nonoption_flags[ch2] = __tmp; \
285
}
286
#else /* !_LIBC */
287
# define SWAP_FLAGS(ch1, ch2)
288
#endif /* _LIBC */
289
290
/* Exchange two adjacent subsequences of ARGV.
291
One subsequence is elements [first_nonopt,last_nonopt)
292
which contains all the non-options that have been skipped so far.
293
The other is elements [last_nonopt,optind), which contains all
294
the options processed since those non-options were skipped.
295
296
`first_nonopt' and `last_nonopt' are relocated so that they describe
297
the new indices of the non-options in ARGV after they are moved. */
298
299
#if defined (__STDC__) && __STDC__
300
static void exchange (char **);
301
#endif
302
303
static void
304
exchange (argv)
305
char **argv;
306
{
307
int bottom = first_nonopt;
308
int middle = last_nonopt;
309
int top = optind;
310
char *tem;
311
312
/* Exchange the shorter segment with the far end of the longer segment.
313
That puts the shorter segment into the right place.
314
It leaves the longer segment in the right place overall,
315
but it consists of two parts that need to be swapped next. */
316
317
#ifdef _LIBC
318
/* First make sure the handling of the `__getopt_nonoption_flags'
319
string can work normally. Our top argument must be in the range
320
of the string. */
321
if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len)
322
{
323
/* We must extend the array. The user plays games with us and
324
presents new arguments. */
325
char *new_str = malloc (top + 1);
326
if (new_str == NULL)
327
nonoption_flags_len = nonoption_flags_max_len = 0;
328
else
329
{
330
memcpy (new_str, __getopt_nonoption_flags, nonoption_flags_max_len);
331
memset (&new_str[nonoption_flags_max_len], '\0',
332
top + 1 - nonoption_flags_max_len);
333
nonoption_flags_max_len = top + 1;
334
__getopt_nonoption_flags = new_str;
335
}
336
}
337
#endif
338
339
while (top > middle && middle > bottom)
340
{
341
if (top - middle > middle - bottom)
342
{
343
/* Bottom segment is the short one. */
344
int len = middle - bottom;
345
register int i;
346
347
/* Swap it with the top part of the top segment. */
348
for (i = 0; i < len; i++)
349
{
350
tem = argv[bottom + i];
351
argv[bottom + i] = argv[top - (middle - bottom) + i];
352
argv[top - (middle - bottom) + i] = tem;
353
SWAP_FLAGS (bottom + i, top - (middle - bottom) + i);
354
}
355
/* Exclude the moved bottom segment from further swapping. */
356
top -= len;
357
}
358
else
359
{
360
/* Top segment is the short one. */
361
int len = top - middle;
362
register int i;
363
364
/* Swap it with the bottom part of the bottom segment. */
365
for (i = 0; i < len; i++)
366
{
367
tem = argv[bottom + i];
368
argv[bottom + i] = argv[middle + i];
369
argv[middle + i] = tem;
370
SWAP_FLAGS (bottom + i, middle + i);
371
}
372
/* Exclude the moved top segment from further swapping. */
373
bottom += len;
374
}
375
}
376
377
/* Update records for the slots the non-options now occupy. */
378
379
first_nonopt += (optind - last_nonopt);
380
last_nonopt = optind;
381
}
382
383
/* Initialize the internal data when the first call is made. */
384
385
#if defined (__STDC__) && __STDC__
386
static const char *_getopt_initialize (int, char *const *, const char *);
387
#endif
388
static const char *
389
_getopt_initialize (argc, argv, optstring)
390
int argc;
391
char *const *argv;
392
const char *optstring;
393
{
394
/* Start processing options with ARGV-element 1 (since ARGV-element 0
395
is the program name); the sequence of previously skipped
396
non-option ARGV-elements is empty. */
397
398
first_nonopt = last_nonopt = optind;
399
400
nextchar = NULL;
401
402
posixly_correct = getenv ("POSIXLY_CORRECT");
403
404
/* Determine how to handle the ordering of options and nonoptions. */
405
406
if (optstring[0] == '-')
407
{
408
ordering = RETURN_IN_ORDER;
409
++optstring;
410
}
411
else if (optstring[0] == '+')
412
{
413
ordering = REQUIRE_ORDER;
414
++optstring;
415
}
416
else if (posixly_correct != NULL)
417
ordering = REQUIRE_ORDER;
418
else
419
ordering = PERMUTE;
420
421
#ifdef _LIBC
422
if (posixly_correct == NULL
423
&& argc == original_argc && argv == original_argv)
424
{
425
if (nonoption_flags_max_len == 0)
426
{
427
if (__getopt_nonoption_flags == NULL
428
|| __getopt_nonoption_flags[0] == '\0')
429
nonoption_flags_max_len = -1;
430
else
431
{
432
const char *orig_str = __getopt_nonoption_flags;
433
int len = nonoption_flags_max_len = strlen (orig_str);
434
if (nonoption_flags_max_len < argc)
435
nonoption_flags_max_len = argc;
436
__getopt_nonoption_flags =
437
(char *) malloc (nonoption_flags_max_len);
438
if (__getopt_nonoption_flags == NULL)
439
nonoption_flags_max_len = -1;
440
else
441
{
442
memcpy (__getopt_nonoption_flags, orig_str, len);
443
memset (&__getopt_nonoption_flags[len], '\0',
444
nonoption_flags_max_len - len);
445
}
446
}
447
}
448
nonoption_flags_len = nonoption_flags_max_len;
449
}
450
else
451
nonoption_flags_len = 0;
452
#endif
453
454
return optstring;
455
}
456
457
/* Scan elements of ARGV (whose length is ARGC) for option characters
458
given in OPTSTRING.
459
460
If an element of ARGV starts with '-', and is not exactly "-" or "--",
461
then it is an option element. The characters of this element
462
(aside from the initial '-') are option characters. If `getopt'
463
is called repeatedly, it returns successively each of the option characters
464
from each of the option elements.
465
466
If `getopt' finds another option character, it returns that character,
467
updating `optind' and `nextchar' so that the next call to `getopt' can
468
resume the scan with the following option character or ARGV-element.
469
470
If there are no more option characters, `getopt' returns -1.
471
Then `optind' is the index in ARGV of the first ARGV-element
472
that is not an option. (The ARGV-elements have been permuted
473
so that those that are not options now come last.)
474
475
OPTSTRING is a string containing the legitimate option characters.
476
If an option character is seen that is not listed in OPTSTRING,
477
return '?' after printing an error message. If you set `opterr' to
478
zero, the error message is suppressed but we still return '?'.
479
480
If a char in OPTSTRING is followed by a colon, that means it wants an arg,
481
so the following text in the same ARGV-element, or the text of the following
482
ARGV-element, is returned in `optarg'. Two colons mean an option that
483
wants an optional arg; if there is text in the current ARGV-element,
484
it is returned in `optarg', otherwise `optarg' is set to zero.
485
486
If OPTSTRING starts with `-' or `+', it requests different methods of
487
handling the non-option ARGV-elements.
488
See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
489
490
Long-named options begin with `--' instead of `-'.
491
Their names may be abbreviated as long as the abbreviation is unique
492
or is an exact match for some defined option. If they have an
493
argument, it follows the option name in the same ARGV-element, separated
494
from the option name by a `=', or else the in next ARGV-element.
495
When `getopt' finds a long-named option, it returns 0 if that option's
496
`flag' field is nonzero, the value of the option's `val' field
497
if the `flag' field is zero.
498
499
The elements of ARGV aren't really const, because we permute them.
500
But we pretend they're const in the prototype to be compatible
501
with other systems.
502
503
LONGOPTS is a vector of `struct option' terminated by an
504
element containing a name which is zero.
505
506
LONGIND returns the index in LONGOPT of the long-named option found.
507
It is only valid when a long-named option has been found by the most
508
recent call.
509
510
If LONG_ONLY is nonzero, '-' as well as '--' can introduce
511
long-named options. */
512
513
int
514
_getopt_internal (argc, argv, optstring, longopts, longind, long_only)
515
int argc;
516
char *const *argv;
517
const char *optstring;
518
const struct option *longopts;
519
int *longind;
520
int long_only;
521
{
522
optarg = NULL;
523
524
if (optind == 0 || !__getopt_initialized)
525
{
526
if (optind == 0)
527
optind = 1; /* Don't scan ARGV[0], the program name. */
528
optstring = _getopt_initialize (argc, argv, optstring);
529
__getopt_initialized = 1;
530
}
531
532
/* Test whether ARGV[optind] points to a non-option argument.
533
Either it does not have option syntax, or there is an environment flag
534
from the shell indicating it is not an option. The later information
535
is only used when the used in the GNU libc. */
536
#ifdef _LIBC
537
#define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \
538
|| (optind < nonoption_flags_len \
539
&& __getopt_nonoption_flags[optind] == '1'))
540
#else
541
#define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0')
542
#endif
543
544
if (nextchar == NULL || *nextchar == '\0')
545
{
546
/* Advance to the next ARGV-element. */
547
548
/* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been
549
moved back by the user (who may also have changed the arguments). */
550
if (last_nonopt > optind)
551
last_nonopt = optind;
552
if (first_nonopt > optind)
553
first_nonopt = optind;
554
555
if (ordering == PERMUTE)
556
{
557
/* If we have just processed some options following some non-options,
558
exchange them so that the options come first. */
559
560
if (first_nonopt != last_nonopt && last_nonopt != optind)
561
exchange ((char **) argv);
562
else if (last_nonopt != optind)
563
first_nonopt = optind;
564
565
/* Skip any additional non-options
566
and extend the range of non-options previously skipped. */
567
568
while (optind < argc && NONOPTION_P)
569
optind++;
570
last_nonopt = optind;
571
}
572
573
/* The special ARGV-element `--' means premature end of options.
574
Skip it like a null option,
575
then exchange with previous non-options as if it were an option,
576
then skip everything else like a non-option. */
577
578
if (optind != argc && !strcmp (argv[optind], "--"))
579
{
580
optind++;
581
582
if (first_nonopt != last_nonopt && last_nonopt != optind)
583
exchange ((char **) argv);
584
else if (first_nonopt == last_nonopt)
585
first_nonopt = optind;
586
last_nonopt = argc;
587
588
optind = argc;
589
}
590
591
/* If we have done all the ARGV-elements, stop the scan
592
and back over any non-options that we skipped and permuted. */
593
594
if (optind == argc)
595
{
596
/* Set the next-arg-index to point at the non-options
597
that we previously skipped, so the caller will digest them. */
598
if (first_nonopt != last_nonopt)
599
optind = first_nonopt;
600
return -1;
601
}
602
603
/* If we have come to a non-option and did not permute it,
604
either stop the scan or describe it to the caller and pass it by. */
605
606
if (NONOPTION_P)
607
{
608
if (ordering == REQUIRE_ORDER)
609
return -1;
610
optarg = argv[optind++];
611
return 1;
612
}
613
614
/* We have found another option-ARGV-element.
615
Skip the initial punctuation. */
616
617
nextchar = (argv[optind] + 1
618
+ (longopts != NULL && argv[optind][1] == '-'));
619
}
620
621
/* Decode the current option-ARGV-element. */
622
623
/* Check whether the ARGV-element is a long option.
624
625
If long_only and the ARGV-element has the form "-f", where f is
626
a valid short option, don't consider it an abbreviated form of
627
a long option that starts with f. Otherwise there would be no
628
way to give the -f short option.
629
630
On the other hand, if there's a long option "fubar" and
631
the ARGV-element is "-fu", do consider that an abbreviation of
632
the long option, just like "--fu", and not "-f" with arg "u".
633
634
This distinction seems to be the most useful approach. */
635
636
if (longopts != NULL
637
&& (argv[optind][1] == '-'
638
|| (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1])))))
639
{
640
char *nameend;
641
const struct option *p;
642
const struct option *pfound = NULL;
643
int exact = 0;
644
int ambig = 0;
645
int indfound = -1;
646
int option_index;
647
648
for (nameend = nextchar; *nameend && *nameend != '='; nameend++)
649
/* Do nothing. */ ;
650
651
/* Test all long options for either exact match
652
or abbreviated matches. */
653
for (p = longopts, option_index = 0; p->name; p++, option_index++)
654
if (!strncmp (p->name, nextchar, nameend - nextchar))
655
{
656
if ((unsigned int) (nameend - nextchar)
657
== (unsigned int) strlen (p->name))
658
{
659
/* Exact match found. */
660
pfound = p;
661
indfound = option_index;
662
exact = 1;
663
break;
664
}
665
else if (pfound == NULL)
666
{
667
/* First nonexact match found. */
668
pfound = p;
669
indfound = option_index;
670
}
671
else
672
/* Second or later nonexact match found. */
673
ambig = 1;
674
}
675
676
if (ambig && !exact)
677
{
678
if (opterr)
679
fprintf (stderr, _("%s: option `%s' is ambiguous\n"),
680
argv[0], argv[optind]);
681
nextchar += strlen (nextchar);
682
optind++;
683
optopt = 0;
684
return '?';
685
}
686
687
if (pfound != NULL)
688
{
689
option_index = indfound;
690
optind++;
691
if (*nameend)
692
{
693
/* Don't test has_arg with >, because some C compilers don't
694
allow it to be used on enums. */
695
if (pfound->has_arg)
696
optarg = nameend + 1;
697
else
698
{
699
if (opterr)
700
if (argv[optind - 1][1] == '-')
701
/* --option */
702
fprintf (stderr,
703
_("%s: option `--%s' doesn't allow an argument\n"),
704
argv[0], pfound->name);
705
else
706
/* +option or -option */
707
fprintf (stderr,
708
_("%s: option `%c%s' doesn't allow an argument\n"),
709
argv[0], argv[optind - 1][0], pfound->name);
710
711
nextchar += strlen (nextchar);
712
713
optopt = pfound->val;
714
return '?';
715
}
716
}
717
else if (pfound->has_arg == 1)
718
{
719
if (optind < argc)
720
optarg = argv[optind++];
721
else
722
{
723
if (opterr)
724
fprintf (stderr,
725
_("%s: option `%s' requires an argument\n"),
726
argv[0], argv[optind - 1]);
727
nextchar += strlen (nextchar);
728
optopt = pfound->val;
729
return optstring[0] == ':' ? ':' : '?';
730
}
731
}
732
nextchar += strlen (nextchar);
733
if (longind != NULL)
734
*longind = option_index;
735
if (pfound->flag)
736
{
737
*(pfound->flag) = pfound->val;
738
return 0;
739
}
740
return pfound->val;
741
}
742
743
/* Can't find it as a long option. If this is not getopt_long_only,
744
or the option starts with '--' or is not a valid short
745
option, then it's an error.
746
Otherwise interpret it as a short option. */
747
if (!long_only || argv[optind][1] == '-'
748
|| my_index (optstring, *nextchar) == NULL)
749
{
750
if (opterr)
751
{
752
if (argv[optind][1] == '-')
753
/* --option */
754
fprintf (stderr, _("%s: unrecognized option `--%s'\n"),
755
argv[0], nextchar);
756
else
757
/* +option or -option */
758
fprintf (stderr, _("%s: unrecognized option `%c%s'\n"),
759
argv[0], argv[optind][0], nextchar);
760
}
761
nextchar = (char *) "";
762
optind++;
763
optopt = 0;
764
return '?';
765
}
766
}
767
768
/* Look at and handle the next short option-character. */
769
770
{
771
char c = *nextchar++;
772
char *temp = my_index (optstring, c);
773
774
/* Increment `optind' when we start to process its last character. */
775
if (*nextchar == '\0')
776
++optind;
777
778
if (temp == NULL || c == ':')
779
{
780
if (opterr)
781
{
782
if (posixly_correct)
783
/* 1003.2 specifies the format of this message. */
784
fprintf (stderr, _("%s: illegal option -- %c\n"),
785
argv[0], c);
786
else
787
fprintf (stderr, _("%s: invalid option -- %c\n"),
788
argv[0], c);
789
}
790
optopt = c;
791
return '?';
792
}
793
/* Convenience. Treat POSIX -W foo same as long option --foo */
794
if (temp[0] == 'W' && temp[1] == ';')
795
{
796
char *nameend;
797
const struct option *p;
798
const struct option *pfound = NULL;
799
int exact = 0;
800
int ambig = 0;
801
int indfound = 0;
802
int option_index;
803
804
/* This is an option that requires an argument. */
805
if (*nextchar != '\0')
806
{
807
optarg = nextchar;
808
/* If we end this ARGV-element by taking the rest as an arg,
809
we must advance to the next element now. */
810
optind++;
811
}
812
else if (optind == argc)
813
{
814
if (opterr)
815
{
816
/* 1003.2 specifies the format of this message. */
817
fprintf (stderr, _("%s: option requires an argument -- %c\n"),
818
argv[0], c);
819
}
820
optopt = c;
821
if (optstring[0] == ':')
822
c = ':';
823
else
824
c = '?';
825
return c;
826
}
827
else
828
/* We already incremented `optind' once;
829
increment it again when taking next ARGV-elt as argument. */
830
optarg = argv[optind++];
831
832
/* optarg is now the argument, see if it's in the
833
table of longopts. */
834
835
for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++)
836
/* Do nothing. */ ;
837
838
/* Test all long options for either exact match
839
or abbreviated matches. */
840
for (p = longopts, option_index = 0; p->name; p++, option_index++)
841
if (!strncmp (p->name, nextchar, nameend - nextchar))
842
{
843
if ((unsigned int) (nameend - nextchar) == strlen (p->name))
844
{
845
/* Exact match found. */
846
pfound = p;
847
indfound = option_index;
848
exact = 1;
849
break;
850
}
851
else if (pfound == NULL)
852
{
853
/* First nonexact match found. */
854
pfound = p;
855
indfound = option_index;
856
}
857
else
858
/* Second or later nonexact match found. */
859
ambig = 1;
860
}
861
if (ambig && !exact)
862
{
863
if (opterr)
864
fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"),
865
argv[0], argv[optind]);
866
nextchar += strlen (nextchar);
867
optind++;
868
return '?';
869
}
870
if (pfound != NULL)
871
{
872
option_index = indfound;
873
if (*nameend)
874
{
875
/* Don't test has_arg with >, because some C compilers don't
876
allow it to be used on enums. */
877
if (pfound->has_arg)
878
optarg = nameend + 1;
879
else
880
{
881
if (opterr)
882
fprintf (stderr, _("\
883
%s: option `-W %s' doesn't allow an argument\n"),
884
argv[0], pfound->name);
885
886
nextchar += strlen (nextchar);
887
return '?';
888
}
889
}
890
else if (pfound->has_arg == 1)
891
{
892
if (optind < argc)
893
optarg = argv[optind++];
894
else
895
{
896
if (opterr)
897
fprintf (stderr,
898
_("%s: option `%s' requires an argument\n"),
899
argv[0], argv[optind - 1]);
900
nextchar += strlen (nextchar);
901
return optstring[0] == ':' ? ':' : '?';
902
}
903
}
904
nextchar += strlen (nextchar);
905
if (longind != NULL)
906
*longind = option_index;
907
if (pfound->flag)
908
{
909
*(pfound->flag) = pfound->val;
910
return 0;
911
}
912
return pfound->val;
913
}
914
nextchar = NULL;
915
return 'W'; /* Let the application handle it. */
916
}
917
if (temp[1] == ':')
918
{
919
if (temp[2] == ':')
920
{
921
/* This is an option that accepts an argument optionally. */
922
if (*nextchar != '\0')
923
{
924
optarg = nextchar;
925
optind++;
926
}
927
else
928
optarg = NULL;
929
nextchar = NULL;
930
}
931
else
932
{
933
/* This is an option that requires an argument. */
934
if (*nextchar != '\0')
935
{
936
optarg = nextchar;
937
/* If we end this ARGV-element by taking the rest as an arg,
938
we must advance to the next element now. */
939
optind++;
940
}
941
else if (optind == argc)
942
{
943
if (opterr)
944
{
945
/* 1003.2 specifies the format of this message. */
946
fprintf (stderr,
947
_("%s: option requires an argument -- %c\n"),
948
argv[0], c);
949
}
950
optopt = c;
951
if (optstring[0] == ':')
952
c = ':';
953
else
954
c = '?';
955
}
956
else
957
/* We already incremented `optind' once;
958
increment it again when taking next ARGV-elt as argument. */
959
optarg = argv[optind++];
960
nextchar = NULL;
961
}
962
}
963
return c;
964
}
965
}
966
967
int
968
getopt (argc, argv, optstring)
969
int argc;
970
char *const *argv;
971
const char *optstring;
972
{
973
return _getopt_internal (argc, argv, optstring,
974
(const struct option *) 0,
975
(int *) 0,
976
0);
977
}
978
979
#endif /* Not ELIDE_CODE. */
980
981
#ifdef TEST
982
983
/* Compile with -DTEST to make an executable for use in testing
984
the above definition of `getopt'. */
985
986
int
987
main (argc, argv)
988
int argc;
989
char **argv;
990
{
991
int c;
992
int digit_optind = 0;
993
994
while (1)
995
{
996
int this_option_optind = optind ? optind : 1;
997
998
c = getopt (argc, argv, "abc:d:0123456789");
999
if (c == -1)
1000
break;
1001
1002
switch (c)
1003
{
1004
case '0':
1005
case '1':
1006
case '2':
1007
case '3':
1008
case '4':
1009
case '5':
1010
case '6':
1011
case '7':
1012
case '8':
1013
case '9':
1014
if (digit_optind != 0 && digit_optind != this_option_optind)
1015
printf ("digits occur in two different argv-elements.\n");
1016
digit_optind = this_option_optind;
1017
printf ("option %c\n", c);
1018
break;
1019
1020
case 'a':
1021
printf ("option a\n");
1022
break;
1023
1024
case 'b':
1025
printf ("option b\n");
1026
break;
1027
1028
case 'c':
1029
printf ("option c with value `%s'\n", optarg);
1030
break;
1031
1032
case '?':
1033
break;
1034
1035
default:
1036
printf ("?? getopt returned character code 0%o ??\n", c);
1037
}
1038
}
1039
1040
if (optind < argc)
1041
{
1042
printf ("non-option ARGV-elements: ");
1043
while (optind < argc)
1044
printf ("%s ", argv[optind++]);
1045
printf ("\n");
1046
}
1047
1048
exit (0);
1049
}
1050
1051
#endif /* TEST */
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Version: 2.0.1