1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
|
/* Getopt for GNU.
NOTE: getopt is now part of the C library, so if you don't know what
"Keep this file name-space clean" means, talk to roland@gnu.ai.mit.edu
before changing it!
Copyright (C) 1987, 88, 89, 90, 91, 92, 1993
Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your zbx_option) any
later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
#include "common.h"
/* If GETOPT_COMPAT is defined, `+' as well as `--' can introduce a
long-named zbx_option. Because this is not POSIX.2 compliant, it is
being phased out. */
/* #define GETOPT_COMPAT */
#undef GETOPT_COMPAT
/* This version of `getopt' appears to the caller like standard Unix `getopt'
but it behaves differently for the user, since it allows the user
to intersperse the options with the other arguments.
As `getopt' works, it permutes the elements of ARGV so that,
when it is done, all the options precede everything else. Thus
all application programs are extended to handle flexible argument order.
Setting the environment variable POSIXLY_CORRECT disables permutation.
Then the behavior is completely standard.
GNU application programs can use a third alternative mode in which
they can distinguish the relative order of options and other arguments. */
#include "zbxgetopt.h"
#undef BAD_OPTION
/* For communication from `getopt' to the caller.
When `getopt' finds an zbx_option that takes an argument,
the argument value is returned here.
Also, when `ordering' is RETURN_IN_ORDER,
each non-zbx_option ARGV-element is returned here. */
char *zbx_optarg = NULL;
/* Index in ARGV of the next element to be scanned.
This is used for communication to and from the caller
and for communication between successive calls to `getopt'.
On entry to `getopt', zero means this is the first call; initialize.
When `getopt' returns EOF, this is the index of the first of the
non-zbx_option elements that the caller should itself scan.
Otherwise, `zbx_optind' communicates from one call to the next
how much of ARGV has been scanned so far. */
/* XXX 1003.2 says this must be 1 before any call. */
int zbx_optind = 0;
/* The next char to be scanned in the zbx_option-element
in which the last zbx_option character we returned was found.
This allows us to pick up the scan where we left off.
If this is zero, or a null string, it means resume the scan
by advancing to the next ARGV-element. */
static char *nextchar;
/* Callers store zero here to inhibit the error message
for unrecognized options. */
int zbx_opterr = 1;
/* Set to an zbx_option character which was unrecognized.
This must be initialized on some systems to avoid linking in the
system's own getopt implementation. */
#define BAD_OPTION '\0'
int zbx_optopt = BAD_OPTION;
/* Describe how to deal with options that follow non-zbx_option ARGV-elements.
If the caller did not specify anything,
the default is REQUIRE_ORDER if the environment variable
POSIXLY_CORRECT is defined, PERMUTE otherwise.
REQUIRE_ORDER means don't recognize them as options;
stop zbx_option processing when the first non-zbx_option is seen.
This is what Unix does.
This mode of operation is selected by either setting the environment
variable POSIXLY_CORRECT, or using `+' as the first character
of the list of zbx_option characters.
PERMUTE is the default. We permute the contents of ARGV as we scan,
so that eventually all the non-options are at the end. This allows options
to be given in any order, even with programs that were not written to
expect this.
RETURN_IN_ORDER is an zbx_option available to programs that were written
to expect options and other ARGV-elements in any order and that care about
the ordering of the two. We describe each non-zbx_option ARGV-element
as if it were the argument of an zbx_option with character code 1.
Using `-' as the first character of the list of zbx_option characters
selects this mode of operation.
The special argument `--' forces an end of zbx_option-scanning regardless
of the value of `ordering'. In the case of RETURN_IN_ORDER, only
`--' can cause `getopt' to return EOF with `zbx_optind' != ARGC. */
static enum
{
REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
} ordering;
/* Handle permutation of arguments. */
/* Describe the part of ARGV that contains non-options that have
been skipped. `first_nonopt' is the index in ARGV of the first of them;
`last_nonopt' is the index after the last of them. */
static int first_nonopt;
static int last_nonopt;
/* Exchange two adjacent subsequences of ARGV.
One subsequence is elements [first_nonopt,last_nonopt)
which contains all the non-options that have been skipped so far.
The other is elements [last_nonopt,zbx_optind), which contains all
the options processed since those non-options were skipped.
`first_nonopt' and `last_nonopt' are relocated so that they describe
the new indices of the non-options in ARGV after they are moved.
To perform the swap, we first reverse the order of all elements. So
all options now come before all non options, but they are in the
wrong order. So we put back the options and non options in original
order by reversing them again. For example:
original input: a b c -x -y
reverse all: -y -x c b a
reverse options: -x -y c b a
reverse non options: -x -y a b c
*/
static void exchange (char **argv)
{
char *temp; char **first, **last;
/* Reverse all the elements [first_nonopt, zbx_optind) */
first = &argv[first_nonopt];
last = &argv[zbx_optind-1];
while (first < last) {
temp = *first; *first = *last; *last = temp; first++; last--;
}
/* Put back the options in order */
first = &argv[first_nonopt];
first_nonopt += (zbx_optind - last_nonopt);
last = &argv[first_nonopt - 1];
while (first < last) {
temp = *first; *first = *last; *last = temp; first++; last--;
}
/* Put back the non options in order */
first = &argv[first_nonopt];
last_nonopt = zbx_optind;
last = &argv[last_nonopt-1];
while (first < last) {
temp = *first; *first = *last; *last = temp; first++; last--;
}
}
/* Scan elements of ARGV (whose length is ARGC) for zbx_option characters
given in OPTSTRING.
If an element of ARGV starts with '-', and is not exactly "-" or "--",
then it is an zbx_option element. The characters of this element
(aside from the initial '-') are zbx_option characters. If `getopt'
is called repeatedly, it returns successively each of the zbx_option characters
from each of the zbx_option elements.
If `getopt' finds another zbx_option character, it returns that character,
updating `zbx_optind' and `nextchar' so that the next call to `getopt' can
resume the scan with the following zbx_option character or ARGV-element.
If there are no more zbx_option characters, `getopt' returns `EOF'.
Then `zbx_optind' is the index in ARGV of the first ARGV-element
that is not an zbx_option. (The ARGV-elements have been permuted
so that those that are not options now come last.)
OPTSTRING is a string containing the legitimate zbx_option characters.
If an zbx_option character is seen that is not listed in OPTSTRING,
return BAD_OPTION after printing an error message. If you set `zbx_opterr' to
zero, the error message is suppressed but we still return BAD_OPTION.
If a char in OPTSTRING is followed by a colon, that means it wants an arg,
so the following text in the same ARGV-element, or the text of the following
ARGV-element, is returned in `zbx_optarg'. Two colons mean an zbx_option that
wants an optional arg; if there is text in the current ARGV-element,
it is returned in `zbx_optarg', otherwise `zbx_optarg' is set to zero.
If OPTSTRING starts with `-' or `+', it requests different methods of
handling the non-zbx_option ARGV-elements.
See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
Long-named options begin with `--' instead of `-'.
Their names may be abbreviated as long as the abbreviation is unique
or is an exact match for some defined zbx_option. If they have an
argument, it follows the zbx_option name in the same ARGV-element, separated
from the zbx_option name by a `=', or else the in next ARGV-element.
When `getopt' finds a long-named zbx_option, it returns 0 if that zbx_option's
`flag' field is non-zero, the value of the zbx_option's `val' field
if the `flag' field is zero.
LONGOPTS is a vector of `struct zbx_option' terminated by an
element containing a name which is zero.
LONGIND returns the index in LONGOPT of the long-named zbx_option found.
It is only valid when a long-named zbx_option has been found by the most
recent call.
If LONG_ONLY is non-zero, '-' as well as '--' can introduce
long-named options. */
static int zbx_getopt_internal (int argc, char **argv, const char *optstring,
const struct zbx_option *longopts, int *longind,
int long_only)
{
static char empty_string[1];
int option_index;
if (longind != NULL)
*longind = -1;
zbx_optarg = 0;
/* Initialize the internal data when the first call is made.
Start processing options with ARGV-element 1 (since ARGV-element 0
is the program name); the sequence of previously skipped
non-zbx_option ARGV-elements is empty. */
if (zbx_optind == 0)
{
first_nonopt = last_nonopt = zbx_optind = 1;
nextchar = NULL;
/* Determine how to handle the ordering of options and nonoptions. */
if (optstring[0] == '-')
{
ordering = RETURN_IN_ORDER;
++optstring;
}
else if (optstring[0] == '+')
{
ordering = REQUIRE_ORDER;
++optstring;
}
#if OFF
else if (getenv ("POSIXLY_CORRECT") != NULL)
ordering = REQUIRE_ORDER;
#endif
else
ordering = PERMUTE;
}
if (nextchar == NULL || *nextchar == '\0')
{
if (ordering == PERMUTE)
{
/* If we have just processed some options following some non-options,
exchange them so that the options come first. */
if (first_nonopt != last_nonopt && last_nonopt != zbx_optind)
exchange (argv);
else if (last_nonopt != zbx_optind)
first_nonopt = zbx_optind;
/* Now skip any additional non-options
and extend the range of non-options previously skipped. */
while (zbx_optind < argc
&& (argv[zbx_optind][0] != '-' || argv[zbx_optind][1] == '\0')
#ifdef GETOPT_COMPAT
&& (longopts == NULL
|| argv[zbx_optind][0] != '+' || argv[zbx_optind][1] == '\0')
#endif /* GETOPT_COMPAT */
)
zbx_optind++;
last_nonopt = zbx_optind;
}
/* Special ARGV-element `--' means premature end of options.
Skip it like a null zbx_option,
then exchange with previous non-options as if it were an zbx_option,
then skip everything else like a non-zbx_option. */
if (zbx_optind != argc && !strcmp (argv[zbx_optind], "--"))
{
zbx_optind++;
if (first_nonopt != last_nonopt && last_nonopt != zbx_optind)
exchange (argv);
else if (first_nonopt == last_nonopt)
first_nonopt = zbx_optind;
last_nonopt = argc;
zbx_optind = argc;
}
/* If we have done all the ARGV-elements, stop the scan
and back over any non-options that we skipped and permuted. */
if (zbx_optind == argc)
{
/* Set the next-arg-index to point at the non-options
that we previously skipped, so the caller will digest them. */
if (first_nonopt != last_nonopt)
zbx_optind = first_nonopt;
return EOF;
}
/* If we have come to a non-zbx_option and did not permute it,
either stop the scan or describe it to the caller and pass it by. */
if ((argv[zbx_optind][0] != '-' || argv[zbx_optind][1] == '\0')
#ifdef GETOPT_COMPAT
&& (longopts == NULL
|| argv[zbx_optind][0] != '+' || argv[zbx_optind][1] == '\0')
#endif /* GETOPT_COMPAT */
)
{
if (ordering == REQUIRE_ORDER)
return EOF;
zbx_optarg = argv[zbx_optind++];
return 1;
}
/* We have found another zbx_option-ARGV-element.
Start decoding its characters. */
nextchar = (argv[zbx_optind] + 1
+ (longopts != NULL && argv[zbx_optind][1] == '-'));
}
if (longopts != NULL
&& ((argv[zbx_optind][0] == '-'
&& (argv[zbx_optind][1] == '-' || long_only))
#ifdef GETOPT_COMPAT
|| argv[zbx_optind][0] == '+'
#endif /* GETOPT_COMPAT */
))
{
const struct zbx_option *p;
char *s = nextchar;
int exact = 0;
int ambig = 0;
const struct zbx_option *pfound = NULL;
int indfound = 0;
int needexact = 0;
#if ON
/* allow `--zbx_option#value' because you cannot assign a '='
to an environment variable under DOS command.com */
while (*s && *s != '=' && * s != '#')
s++;
#else
while (*s && *s != '=')
s++;
#endif
/* Test all options for either exact match or abbreviated matches. */
for (p = longopts, option_index = 0; p->name;
p++, option_index++)
if (!strncmp (p->name, nextchar, (unsigned) (s - nextchar)))
{
if (p->has_arg & 0x10)
needexact = 1;
if ((unsigned) (s - nextchar) == strlen (p->name))
{
/* Exact match found. */
pfound = p;
indfound = option_index;
exact = 1;
break;
}
#if OFF /* ZBX: disable long option partial matching */
else if (pfound == NULL)
{
/* First nonexact match found. */
pfound = p;
indfound = option_index;
}
else
/* Second nonexact match found. */
ambig = 1;
#endif
}
/* don't allow nonexact longoptions */
if (needexact && !exact)
{
if (zbx_opterr)
zbx_error("unrecognized zbx_option `%s'", argv[zbx_optind]);
nextchar += strlen (nextchar);
zbx_optind++;
return BAD_OPTION;
}
if (ambig && !exact)
{
if (zbx_opterr)
zbx_error("zbx_option `%s' is ambiguous", argv[zbx_optind]);
nextchar += strlen (nextchar);
zbx_optind++;
return BAD_OPTION;
}
if (pfound != NULL)
{
int have_arg = (s[0] != '\0');
if (have_arg && (pfound->has_arg & 0xf))
have_arg = (s[1] != '\0');
option_index = indfound;
zbx_optind++;
if (have_arg)
{
/* Don't test has_arg with >, because some C compilers don't
allow it to be used on enums. */
if (pfound->has_arg & 0xf)
zbx_optarg = s + 1;
else
{
if (zbx_opterr)
{
if (argv[zbx_optind - 1][1] == '-')
/* --zbx_option */
zbx_error("zbx_option `--%s' doesn't allow an argument",pfound->name);
else
/* +zbx_option or -zbx_option */
zbx_error("zbx_option `%c%s' doesn't allow an argument", argv[zbx_optind - 1][0], pfound->name);
}
nextchar += strlen (nextchar);
return BAD_OPTION;
}
}
else if ((pfound->has_arg & 0xf) == 1)
{
#if OFF
if (zbx_optind < argc)
#else
if (zbx_optind < argc && (pfound->has_arg & 0x20) == 0)
#endif
zbx_optarg = argv[zbx_optind++];
else
{
if (zbx_opterr)
zbx_error("zbx_option `--%s%s' requires an argument",
pfound->name, (pfound->has_arg & 0x20) ? "=" : "");
nextchar += strlen (nextchar);
return optstring[0] == ':' ? ':' : BAD_OPTION;
}
}
nextchar += strlen (nextchar);
if (longind != NULL)
*longind = option_index;
if (pfound->flag)
{
*(pfound->flag) = pfound->val;
return 0;
}
return pfound->val;
}
/* Can't find it as a long zbx_option. If this is not getopt_long_only,
or the zbx_option starts with '--' or is not a valid short
zbx_option, then it's an error.
Otherwise interpret it as a short zbx_option. */
if (!long_only || argv[zbx_optind][1] == '-'
#ifdef GETOPT_COMPAT
|| argv[zbx_optind][0] == '+'
#endif /* GETOPT_COMPAT */
|| strchr (optstring, *nextchar) == NULL)
{
if (zbx_opterr)
{
if (argv[zbx_optind][1] == '-')
/* --zbx_option */
zbx_error("unrecognized zbx_option `--%s'", nextchar);
else
/* +zbx_option or -zbx_option */
zbx_error("unrecognized zbx_option `%c%s'", argv[zbx_optind][0], nextchar);
}
nextchar = empty_string;
zbx_optind++;
return BAD_OPTION;
}
(void) &ambig; /* UNUSED */
}
/* Look at and handle the next zbx_option-character. */
{
char c = *nextchar++;
const char *temp = strchr (optstring, c);
/* Increment `zbx_optind' when we start to process its last character. */
if (*nextchar == '\0')
++zbx_optind;
if (temp == NULL || c == ':')
{
if (zbx_opterr)
{
#if OFF
if (c < 040 || c >= 0177)
zbx_error("unrecognized zbx_option, character code 0%o", c);
else
zbx_error("unrecognized zbx_option `-%c'", c);
#else
/* 1003.2 specifies the format of this message. */
zbx_error("illegal zbx_option -- %c", c);
#endif
}
zbx_optopt = c;
return BAD_OPTION;
}
if (temp[1] == ':')
{
if (temp[2] == ':')
{
/* This is an zbx_option that accepts an argument optionally. */
if (*nextchar != '\0')
{
zbx_optarg = nextchar;
zbx_optind++;
}
else
zbx_optarg = 0;
nextchar = NULL;
}
else
{
/* This is an zbx_option that requires an argument. */
if (*nextchar != '\0')
{
zbx_optarg = nextchar;
/* If we end this ARGV-element by taking the rest as an arg,
we must advance to the next element now. */
zbx_optind++;
}
else if (zbx_optind == argc)
{
if (zbx_opterr)
{
#if OFF
zbx_error("zbx_option `-%c' requires an argument", c);
#else
/* 1003.2 specifies the format of this message. */
zbx_error("zbx_option requires an argument -- %c", c);
#endif
}
zbx_optopt = c;
if (optstring[0] == ':')
c = ':';
else
c = BAD_OPTION;
}
else
/* We already incremented `zbx_optind' once;
increment it again when taking next ARGV-elt as argument. */
zbx_optarg = argv[zbx_optind++];
nextchar = NULL;
}
}
return c;
}
}
int zbx_getopt(int argc, char **argv, const char *optstring)
{
return zbx_getopt_internal (argc, argv, optstring,
(const struct zbx_option *) 0,
(int *) 0,
0);
}
int zbx_getopt_long(int argc, char **argv, const char *options,
const struct zbx_option *long_options, int *opt_index)
{
return zbx_getopt_internal (argc, argv, options, long_options, opt_index, 0);
}
#ifdef TEST2
/* Compile with -DTEST to make an executable for use in testing
the above definition of `getopt'. */
int
main (argc, argv)
int argc;
char **argv;
{
int c;
int digit_optind = 0;
while (1)
{
int this_option_optind = zbx_optind ? zbx_optind : 1;
c = getopt (argc, argv, "abc:d:0123456789");
if (c == EOF)
break;
switch (c)
{
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
if (digit_optind != 0 && digit_optind != this_option_optind)
printf ("digits occur in two different argv-elements.\n");
digit_optind = this_option_optind;
printf ("zbx_option %c\n", c);
break;
case 'a':
printf ("zbx_option a\n");
break;
case 'b':
printf ("zbx_option b\n");
break;
case 'c':
printf ("zbx_option c with value `%s'\n", zbx_optarg);
break;
case BAD_OPTION:
break;
default:
printf ("?? getopt returned character code 0%o ??\n", c);
}
}
if (zbx_optind < argc)
{
printf ("non-zbx_option ARGV-elements: ");
while (zbx_optind < argc)
printf ("%s ", argv[zbx_optind++]);
printf ("\n");
}
exit (0);
}
#endif /* TEST */
|