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- Committer: Bazaar Package Importer
- Author(s): Mike Markley
- Date: 2002-03-15 20:20:06 UTC
- Revision ID: james.westby@ubuntu.com-20020315202006-fywvbk2rzaqe5ku2
Tags: upstream-0.8
Import upstream version 0.8
- files added:
- doc
- include
- po
- src
added
removed
src/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 drepper@gnu.org
4
before changing it!
5
6
Copyright (C) 1987, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98
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
#ifndef _
80
/* This is for other GNU distributions with internationalized messages.
81
When compiling libc, the _ macro is predefined. */
82
# ifdef HAVE_LIBINTL_H
83
# include <libintl.h>
84
# define _(msgid) gettext (msgid)
85
# else
86
# define _(msgid) (msgid)
87
# endif
88
#endif
89
90
/* This version of `getopt' appears to the caller like standard Unix `getopt'
91
but it behaves differently for the user, since it allows the user
92
to intersperse the options with the other arguments.
93
94
As `getopt' works, it permutes the elements of ARGV so that,
95
when it is done, all the options precede everything else. Thus
96
all application programs are extended to handle flexible argument order.
97
98
Setting the environment variable POSIXLY_CORRECT disables permutation.
99
Then the behavior is completely standard.
100
101
GNU application programs can use a third alternative mode in which
102
they can distinguish the relative order of options and other arguments. */
103
104
#include "getopt.h"
105
106
/* For communication from `getopt' to the caller.
107
When `getopt' finds an option that takes an argument,
108
the argument value is returned here.
109
Also, when `ordering' is RETURN_IN_ORDER,
110
each non-option ARGV-element is returned here. */
111
112
char *optarg = NULL;
113
114
/* Index in ARGV of the next element to be scanned.
115
This is used for communication to and from the caller
116
and for communication between successive calls to `getopt'.
117
118
On entry to `getopt', zero means this is the first call; initialize.
119
120
When `getopt' returns -1, this is the index of the first of the
121
non-option elements that the caller should itself scan.
122
123
Otherwise, `optind' communicates from one call to the next
124
how much of ARGV has been scanned so far. */
125
126
/* 1003.2 says this must be 1 before any call. */
127
int optind = 1;
128
129
/* Formerly, initialization of getopt depended on optind==0, which
130
causes problems with re-calling getopt as programs generally don't
131
know that. */
132
133
int __getopt_initialized = 0;
134
135
/* The next char to be scanned in the option-element
136
in which the last option character we returned was found.
137
This allows us to pick up the scan where we left off.
138
139
If this is zero, or a null string, it means resume the scan
140
by advancing to the next ARGV-element. */
141
142
static char *nextchar;
143
144
/* Callers store zero here to inhibit the error message
145
for unrecognized options. */
146
147
int opterr = 1;
148
149
/* Set to an option character which was unrecognized.
150
This must be initialized on some systems to avoid linking in the
151
system's own getopt implementation. */
152
153
int optopt = '?';
154
155
/* Describe how to deal with options that follow non-option ARGV-elements.
156
157
If the caller did not specify anything,
158
the default is REQUIRE_ORDER if the environment variable
159
POSIXLY_CORRECT is defined, PERMUTE otherwise.
160
161
REQUIRE_ORDER means don't recognize them as options;
162
stop option processing when the first non-option is seen.
163
This is what Unix does.
164
This mode of operation is selected by either setting the environment
165
variable POSIXLY_CORRECT, or using `+' as the first character
166
of the list of option characters.
167
168
PERMUTE is the default. We permute the contents of ARGV as we scan,
169
so that eventually all the non-options are at the end. This allows options
170
to be given in any order, even with programs that were not written to
171
expect this.
172
173
RETURN_IN_ORDER is an option available to programs that were written
174
to expect options and other ARGV-elements in any order and that care about
175
the ordering of the two. We describe each non-option ARGV-element
176
as if it were the argument of an option with character code 1.
177
Using `-' as the first character of the list of option characters
178
selects this mode of operation.
179
180
The special argument `--' forces an end of option-scanning regardless
181
of the value of `ordering'. In the case of RETURN_IN_ORDER, only
182
`--' can cause `getopt' to return -1 with `optind' != ARGC. */
183
184
static enum
185
{
186
REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
187
} ordering;
188
189
/* Value of POSIXLY_CORRECT environment variable. */
190
static char *posixly_correct;
191
192
#ifdef __GNU_LIBRARY__
193
/* We want to avoid inclusion of string.h with non-GNU libraries
194
because there are many ways it can cause trouble.
195
On some systems, it contains special magic macros that don't work
196
in GCC. */
197
# include <string.h>
198
# define my_index strchr
199
#else
200
201
# if HAVE_STRING_H
202
# include <string.h>
203
# else
204
# include <strings.h>
205
# endif
206
207
/* Avoid depending on library functions or files
208
whose names are inconsistent. */
209
210
#ifndef getenv
211
extern char *getenv ();
212
#endif
213
214
static char *
215
my_index (str, chr)
216
const char *str;
217
int chr;
218
{
219
while (*str)
220
{
221
if (*str == chr)
222
return (char *) str;
223
str++;
224
}
225
return 0;
226
}
227
228
/* If using GCC, we can safely declare strlen this way.
229
If not using GCC, it is ok not to declare it. */
230
#ifdef __GNUC__
231
/* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h.
232
That was relevant to code that was here before. */
233
# if (!defined __STDC__ || !__STDC__) && !defined strlen
234
/* gcc with -traditional declares the built-in strlen to return int,
235
and has done so at least since version 2.4.5. -- rms. */
236
extern int strlen (const char *);
237
# endif /* not __STDC__ */
238
#endif /* __GNUC__ */
239
240
#endif /* not __GNU_LIBRARY__ */
241
242
/* Handle permutation of arguments. */
243
244
/* Describe the part of ARGV that contains non-options that have
245
been skipped. `first_nonopt' is the index in ARGV of the first of them;
246
`last_nonopt' is the index after the last of them. */
247
248
static int first_nonopt;
249
static int last_nonopt;
250
251
#ifdef _LIBC
252
/* Bash 2.0 gives us an environment variable containing flags
253
indicating ARGV elements that should not be considered arguments. */
254
255
/* Defined in getopt_init.c */
256
extern char *__getopt_nonoption_flags;
257
258
static int nonoption_flags_max_len;
259
static int nonoption_flags_len;
260
261
static int original_argc;
262
static char *const *original_argv;
263
264
/* Make sure the environment variable bash 2.0 puts in the environment
265
is valid for the getopt call we must make sure that the ARGV passed
266
to getopt is that one passed to the process. */
267
static void
268
__attribute__ ((unused))
269
store_args_and_env (int argc, char *const *argv)
270
{
271
/* XXX This is no good solution. We should rather copy the args so
272
that we can compare them later. But we must not use malloc(3). */
273
original_argc = argc;
274
original_argv = argv;
275
}
276
# ifdef text_set_element
277
text_set_element (__libc_subinit, store_args_and_env);
278
# endif /* text_set_element */
279
280
# define SWAP_FLAGS(ch1, ch2) \
281
if (nonoption_flags_len > 0) \
282
{ \
283
char __tmp = __getopt_nonoption_flags[ch1]; \
284
__getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \
285
__getopt_nonoption_flags[ch2] = __tmp; \
286
}
287
#else /* !_LIBC */
288
# define SWAP_FLAGS(ch1, ch2)
289
#endif /* _LIBC */
290
291
/* Exchange two adjacent subsequences of ARGV.
292
One subsequence is elements [first_nonopt,last_nonopt)
293
which contains all the non-options that have been skipped so far.
294
The other is elements [last_nonopt,optind), which contains all
295
the options processed since those non-options were skipped.
296
297
`first_nonopt' and `last_nonopt' are relocated so that they describe
298
the new indices of the non-options in ARGV after they are moved. */
299
300
#if defined __STDC__ && __STDC__
301
static void exchange (char **);
302
#endif
303
304
static void
305
exchange (argv)
306
char **argv;
307
{
308
int bottom = first_nonopt;
309
int middle = last_nonopt;
310
int top = optind;
311
char *tem;
312
313
/* Exchange the shorter segment with the far end of the longer segment.
314
That puts the shorter segment into the right place.
315
It leaves the longer segment in the right place overall,
316
but it consists of two parts that need to be swapped next. */
317
318
#ifdef _LIBC
319
/* First make sure the handling of the `__getopt_nonoption_flags'
320
string can work normally. Our top argument must be in the range
321
of the string. */
322
if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len)
323
{
324
/* We must extend the array. The user plays games with us and
325
presents new arguments. */
326
char *new_str = malloc (top + 1);
327
if (new_str == NULL)
328
nonoption_flags_len = nonoption_flags_max_len = 0;
329
else
330
{
331
memset (__mempcpy (new_str, __getopt_nonoption_flags,
332
nonoption_flags_max_len),
333
'\0', top + 1 - nonoption_flags_max_len);
334
nonoption_flags_max_len = top + 1;
335
__getopt_nonoption_flags = new_str;
336
}
337
}
338
#endif
339
340
while (top > middle && middle > bottom)
341
{
342
if (top - middle > middle - bottom)
343
{
344
/* Bottom segment is the short one. */
345
int len = middle - bottom;
346
register int i;
347
348
/* Swap it with the top part of the top segment. */
349
for (i = 0; i < len; i++)
350
{
351
tem = argv[bottom + i];
352
argv[bottom + i] = argv[top - (middle - bottom) + i];
353
argv[top - (middle - bottom) + i] = tem;
354
SWAP_FLAGS (bottom + i, top - (middle - bottom) + i);
355
}
356
/* Exclude the moved bottom segment from further swapping. */
357
top -= len;
358
}
359
else
360
{
361
/* Top segment is the short one. */
362
int len = top - middle;
363
register int i;
364
365
/* Swap it with the bottom part of the bottom segment. */
366
for (i = 0; i < len; i++)
367
{
368
tem = argv[bottom + i];
369
argv[bottom + i] = argv[middle + i];
370
argv[middle + i] = tem;
371
SWAP_FLAGS (bottom + i, middle + i);
372
}
373
/* Exclude the moved top segment from further swapping. */
374
bottom += len;
375
}
376
}
377
378
/* Update records for the slots the non-options now occupy. */
379
380
first_nonopt += (optind - last_nonopt);
381
last_nonopt = optind;
382
}
383
384
/* Initialize the internal data when the first call is made. */
385
386
#if defined __STDC__ && __STDC__
387
static const char *_getopt_initialize (int, char *const *, const char *);
388
#endif
389
static const char *
390
_getopt_initialize (argc, argv, optstring)
391
int argc;
392
char *const *argv;
393
const char *optstring;
394
{
395
/* Start processing options with ARGV-element 1 (since ARGV-element 0
396
is the program name); the sequence of previously skipped
397
non-option ARGV-elements is empty. */
398
399
first_nonopt = last_nonopt = optind;
400
401
nextchar = NULL;
402
403
posixly_correct = getenv ("POSIXLY_CORRECT");
404
405
/* Determine how to handle the ordering of options and nonoptions. */
406
407
if (optstring[0] == '-')
408
{
409
ordering = RETURN_IN_ORDER;
410
++optstring;
411
}
412
else if (optstring[0] == '+')
413
{
414
ordering = REQUIRE_ORDER;
415
++optstring;
416
}
417
else if (posixly_correct != NULL)
418
ordering = REQUIRE_ORDER;
419
else
420
ordering = PERMUTE;
421
422
#ifdef _LIBC
423
if (posixly_correct == NULL
424
&& argc == original_argc && argv == original_argv)
425
{
426
if (nonoption_flags_max_len == 0)
427
{
428
if (__getopt_nonoption_flags == NULL
429
|| __getopt_nonoption_flags[0] == '\0')
430
nonoption_flags_max_len = -1;
431
else
432
{
433
const char *orig_str = __getopt_nonoption_flags;
434
int len = nonoption_flags_max_len = strlen (orig_str);
435
if (nonoption_flags_max_len < argc)
436
nonoption_flags_max_len = argc;
437
__getopt_nonoption_flags =
438
(char *) malloc (nonoption_flags_max_len);
439
if (__getopt_nonoption_flags == NULL)
440
nonoption_flags_max_len = -1;
441
else
442
memset (__mempcpy (__getopt_nonoption_flags, orig_str, len),
443
'\0', nonoption_flags_max_len - len);
444
}
445
}
446
nonoption_flags_len = nonoption_flags_max_len;
447
}
448
else
449
nonoption_flags_len = 0;
450
#endif
451
452
return optstring;
453
}
454
455
/* Scan elements of ARGV (whose length is ARGC) for option characters
456
given in OPTSTRING.
457
458
If an element of ARGV starts with '-', and is not exactly "-" or "--",
459
then it is an option element. The characters of this element
460
(aside from the initial '-') are option characters. If `getopt'
461
is called repeatedly, it returns successively each of the option characters
462
from each of the option elements.
463
464
If `getopt' finds another option character, it returns that character,
465
updating `optind' and `nextchar' so that the next call to `getopt' can
466
resume the scan with the following option character or ARGV-element.
467
468
If there are no more option characters, `getopt' returns -1.
469
Then `optind' is the index in ARGV of the first ARGV-element
470
that is not an option. (The ARGV-elements have been permuted
471
so that those that are not options now come last.)
472
473
OPTSTRING is a string containing the legitimate option characters.
474
If an option character is seen that is not listed in OPTSTRING,
475
return '?' after printing an error message. If you set `opterr' to
476
zero, the error message is suppressed but we still return '?'.
477
478
If a char in OPTSTRING is followed by a colon, that means it wants an arg,
479
so the following text in the same ARGV-element, or the text of the following
480
ARGV-element, is returned in `optarg'. Two colons mean an option that
481
wants an optional arg; if there is text in the current ARGV-element,
482
it is returned in `optarg', otherwise `optarg' is set to zero.
483
484
If OPTSTRING starts with `-' or `+', it requests different methods of
485
handling the non-option ARGV-elements.
486
See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
487
488
Long-named options begin with `--' instead of `-'.
489
Their names may be abbreviated as long as the abbreviation is unique
490
or is an exact match for some defined option. If they have an
491
argument, it follows the option name in the same ARGV-element, separated
492
from the option name by a `=', or else the in next ARGV-element.
493
When `getopt' finds a long-named option, it returns 0 if that option's
494
`flag' field is nonzero, the value of the option's `val' field
495
if the `flag' field is zero.
496
497
The elements of ARGV aren't really const, because we permute them.
498
But we pretend they're const in the prototype to be compatible
499
with other systems.
500
501
LONGOPTS is a vector of `struct option' terminated by an
502
element containing a name which is zero.
503
504
LONGIND returns the index in LONGOPT of the long-named option found.
505
It is only valid when a long-named option has been found by the most
506
recent call.
507
508
If LONG_ONLY is nonzero, '-' as well as '--' can introduce
509
long-named options. */
510
511
int
512
_getopt_internal (argc, argv, optstring, longopts, longind, long_only)
513
int argc;
514
char *const *argv;
515
const char *optstring;
516
const struct option *longopts;
517
int *longind;
518
int long_only;
519
{
520
optarg = NULL;
521
522
if (optind == 0 || !__getopt_initialized)
523
{
524
if (optind == 0)
525
optind = 1; /* Don't scan ARGV[0], the program name. */
526
optstring = _getopt_initialize (argc, argv, optstring);
527
__getopt_initialized = 1;
528
}
529
530
/* Test whether ARGV[optind] points to a non-option argument.
531
Either it does not have option syntax, or there is an environment flag
532
from the shell indicating it is not an option. The later information
533
is only used when the used in the GNU libc. */
534
#ifdef _LIBC
535
# define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \
536
|| (optind < nonoption_flags_len \
537
&& __getopt_nonoption_flags[optind] == '1'))
538
#else
539
# define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0')
540
#endif
541
542
if (nextchar == NULL || *nextchar == '\0')
543
{
544
/* Advance to the next ARGV-element. */
545
546
/* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been
547
moved back by the user (who may also have changed the arguments). */
548
if (last_nonopt > optind)
549
last_nonopt = optind;
550
if (first_nonopt > optind)
551
first_nonopt = optind;
552
553
if (ordering == PERMUTE)
554
{
555
/* If we have just processed some options following some non-options,
556
exchange them so that the options come first. */
557
558
if (first_nonopt != last_nonopt && last_nonopt != optind)
559
exchange ((char **) argv);
560
else if (last_nonopt != optind)
561
first_nonopt = optind;
562
563
/* Skip any additional non-options
564
and extend the range of non-options previously skipped. */
565
566
while (optind < argc && NONOPTION_P)
567
optind++;
568
last_nonopt = optind;
569
}
570
571
/* The special ARGV-element `--' means premature end of options.
572
Skip it like a null option,
573
then exchange with previous non-options as if it were an option,
574
then skip everything else like a non-option. */
575
576
if (optind != argc && !strcmp (argv[optind], "--"))
577
{
578
optind++;
579
580
if (first_nonopt != last_nonopt && last_nonopt != optind)
581
exchange ((char **) argv);
582
else if (first_nonopt == last_nonopt)
583
first_nonopt = optind;
584
last_nonopt = argc;
585
586
optind = argc;
587
}
588
589
/* If we have done all the ARGV-elements, stop the scan
590
and back over any non-options that we skipped and permuted. */
591
592
if (optind == argc)
593
{
594
/* Set the next-arg-index to point at the non-options
595
that we previously skipped, so the caller will digest them. */
596
if (first_nonopt != last_nonopt)
597
optind = first_nonopt;
598
return -1;
599
}
600
601
/* If we have come to a non-option and did not permute it,
602
either stop the scan or describe it to the caller and pass it by. */
603
604
if (NONOPTION_P)
605
{
606
if (ordering == REQUIRE_ORDER)
607
return -1;
608
optarg = argv[optind++];
609
return 1;
610
}
611
612
/* We have found another option-ARGV-element.
613
Skip the initial punctuation. */
614
615
nextchar = (argv[optind] + 1
616
+ (longopts != NULL && argv[optind][1] == '-'));
617
}
618
619
/* Decode the current option-ARGV-element. */
620
621
/* Check whether the ARGV-element is a long option.
622
623
If long_only and the ARGV-element has the form "-f", where f is
624
a valid short option, don't consider it an abbreviated form of
625
a long option that starts with f. Otherwise there would be no
626
way to give the -f short option.
627
628
On the other hand, if there's a long option "fubar" and
629
the ARGV-element is "-fu", do consider that an abbreviation of
630
the long option, just like "--fu", and not "-f" with arg "u".
631
632
This distinction seems to be the most useful approach. */
633
634
if (longopts != NULL
635
&& (argv[optind][1] == '-'
636
|| (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1])))))
637
{
638
char *nameend;
639
const struct option *p;
640
const struct option *pfound = NULL;
641
int exact = 0;
642
int ambig = 0;
643
int indfound = -1;
644
int option_index;
645
646
for (nameend = nextchar; *nameend && *nameend != '='; nameend++)
647
/* Do nothing. */ ;
648
649
/* Test all long options for either exact match
650
or abbreviated matches. */
651
for (p = longopts, option_index = 0; p->name; p++, option_index++)
652
if (!strncmp (p->name, nextchar, nameend - nextchar))
653
{
654
if ((unsigned int) (nameend - nextchar)
655
== (unsigned int) strlen (p->name))
656
{
657
/* Exact match found. */
658
pfound = p;
659
indfound = option_index;
660
exact = 1;
661
break;
662
}
663
else if (pfound == NULL)
664
{
665
/* First nonexact match found. */
666
pfound = p;
667
indfound = option_index;
668
}
669
else
670
/* Second or later nonexact match found. */
671
ambig = 1;
672
}
673
674
if (ambig && !exact)
675
{
676
if (opterr)
677
fprintf (stderr, _("%s: option `%s' is ambiguous\n"),
678
argv[0], argv[optind]);
679
nextchar += strlen (nextchar);
680
optind++;
681
optopt = 0;
682
return '?';
683
}
684
685
if (pfound != NULL)
686
{
687
option_index = indfound;
688
optind++;
689
if (*nameend)
690
{
691
/* Don't test has_arg with >, because some C compilers don't
692
allow it to be used on enums. */
693
if (pfound->has_arg)
694
optarg = nameend + 1;
695
else
696
{
697
if (opterr)
698
{
699
if (argv[optind - 1][1] == '-')
700
/* --option */
701
fprintf (stderr,
702
_("%s: option `--%s' doesn't allow an argument\n"),
703
argv[0], pfound->name);
704
else
705
/* +option or -option */
706
fprintf (stderr,
707
_("%s: option `%c%s' doesn't allow an argument\n"),
708
argv[0], argv[optind - 1][0], pfound->name);
709
}
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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