Annotation of embedaddon/smartmontools/getopt/getopt.c, revision 1.1.1.1
1.1 misho 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: Copyright (C) 1987,88,89,90,91,92,93,94,95,96,98,99,2000,2001,2002
6: Free Software Foundation, Inc.
7: This file is part of the GNU C Library.
8:
9: The GNU C Library is free software; you can redistribute it and/or
10: modify it under the terms of the GNU Lesser General Public
11: License as published by the Free Software Foundation; either
12: version 2.1 of the 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: Lesser General Public License for more details.
18:
19: You should have received a copy of the GNU Lesser General Public
20: License along with the GNU C Library; if not, write to the Free
21: Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
22: 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: # if (HAVE_LIBINTL_H && ENABLE_NLS) || defined _LIBC
82: # include <libintl.h>
83: # ifndef _
84: # define _(msgid) gettext (msgid)
85: # endif
86: # else
87: # define _(msgid) (msgid)
88: # endif
89: # if defined _LIBC && defined USE_IN_LIBIO
90: # include <wchar.h>
91: # endif
92: #endif
93:
94: #ifndef attribute_hidden
95: # define attribute_hidden
96: #endif
97:
98: /* This version of `getopt' appears to the caller like standard Unix `getopt'
99: but it behaves differently for the user, since it allows the user
100: to intersperse the options with the other arguments.
101:
102: As `getopt' works, it permutes the elements of ARGV so that,
103: when it is done, all the options precede everything else. Thus
104: all application programs are extended to handle flexible argument order.
105:
106: Setting the environment variable POSIXLY_CORRECT disables permutation.
107: Then the behavior is completely standard.
108:
109: GNU application programs can use a third alternative mode in which
110: they can distinguish the relative order of options and other arguments. */
111:
112: #include "getopt.h"
113:
114: /* For communication from `getopt' to the caller.
115: When `getopt' finds an option that takes an argument,
116: the argument value is returned here.
117: Also, when `ordering' is RETURN_IN_ORDER,
118: each non-option ARGV-element is returned here. */
119:
120: char *optarg;
121:
122: /* Index in ARGV of the next element to be scanned.
123: This is used for communication to and from the caller
124: and for communication between successive calls to `getopt'.
125:
126: On entry to `getopt', zero means this is the first call; initialize.
127:
128: When `getopt' returns -1, this is the index of the first of the
129: non-option elements that the caller should itself scan.
130:
131: Otherwise, `optind' communicates from one call to the next
132: how much of ARGV has been scanned so far. */
133:
134: /* 1003.2 says this must be 1 before any call. */
135: int optind = 1;
136:
137: /* Formerly, initialization of getopt depended on optind==0, which
138: causes problems with re-calling getopt as programs generally don't
139: know that. */
140:
141: int __getopt_initialized attribute_hidden;
142:
143: /* The next char to be scanned in the option-element
144: in which the last option character we returned was found.
145: This allows us to pick up the scan where we left off.
146:
147: If this is zero, or a null string, it means resume the scan
148: by advancing to the next ARGV-element. */
149:
150: static char *nextchar;
151:
152: /* Callers store zero here to inhibit the error message
153: for unrecognized options. */
154:
155: int opterr = 1;
156:
157: /* Set to an option character which was unrecognized.
158: This must be initialized on some systems to avoid linking in the
159: system's own getopt implementation. */
160:
161: int optopt = '?';
162:
163: /* Describe how to deal with options that follow non-option ARGV-elements.
164:
165: If the caller did not specify anything,
166: the default is REQUIRE_ORDER if the environment variable
167: POSIXLY_CORRECT is defined, PERMUTE otherwise.
168:
169: REQUIRE_ORDER means don't recognize them as options;
170: stop option processing when the first non-option is seen.
171: This is what Unix does.
172: This mode of operation is selected by either setting the environment
173: variable POSIXLY_CORRECT, or using `+' as the first character
174: of the list of option characters.
175:
176: PERMUTE is the default. We permute the contents of ARGV as we scan,
177: so that eventually all the non-options are at the end. This allows options
178: to be given in any order, even with programs that were not written to
179: expect this.
180:
181: RETURN_IN_ORDER is an option available to programs that were written
182: to expect options and other ARGV-elements in any order and that care about
183: the ordering of the two. We describe each non-option ARGV-element
184: as if it were the argument of an option with character code 1.
185: Using `-' as the first character of the list of option characters
186: selects this mode of operation.
187:
188: The special argument `--' forces an end of option-scanning regardless
189: of the value of `ordering'. In the case of RETURN_IN_ORDER, only
190: `--' can cause `getopt' to return -1 with `optind' != ARGC. */
191:
192: static enum
193: {
194: REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
195: } ordering;
196:
197: /* Value of POSIXLY_CORRECT environment variable. */
198: static char *posixly_correct;
199:
200: #ifdef __GNU_LIBRARY__
201: /* We want to avoid inclusion of string.h with non-GNU libraries
202: because there are many ways it can cause trouble.
203: On some systems, it contains special magic macros that don't work
204: in GCC. */
205: # include <string.h>
206: # define my_index strchr
207: #else
208:
209: # if HAVE_STRING_H
210: # include <string.h>
211: # else
212: # include <strings.h>
213: # endif
214:
215: /* Avoid depending on library functions or files
216: whose names are inconsistent. */
217:
218: #ifndef getenv
219: extern char *getenv ();
220: #endif
221:
222: static char *
223: my_index (str, chr)
224: const char *str;
225: int chr;
226: {
227: while (*str)
228: {
229: if (*str == chr)
230: return (char *) str;
231: str++;
232: }
233: return 0;
234: }
235:
236: /* If using GCC, we can safely declare strlen this way.
237: If not using GCC, it is ok not to declare it. */
238: #ifdef __GNUC__
239: /* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h.
240: That was relevant to code that was here before. */
241: # if (!defined __STDC__ || !__STDC__) && !defined strlen
242: /* gcc with -traditional declares the built-in strlen to return int,
243: and has done so at least since version 2.4.5. -- rms. */
244: extern int strlen (const char *);
245: # endif /* not __STDC__ */
246: #endif /* __GNUC__ */
247:
248: #endif /* not __GNU_LIBRARY__ */
249:
250: /* Handle permutation of arguments. */
251:
252: /* Describe the part of ARGV that contains non-options that have
253: been skipped. `first_nonopt' is the index in ARGV of the first of them;
254: `last_nonopt' is the index after the last of them. */
255:
256: static int first_nonopt;
257: static int last_nonopt;
258:
259: #ifdef _LIBC
260: /* Stored original parameters.
261: XXX This is no good solution. We should rather copy the args so
262: that we can compare them later. But we must not use malloc(3). */
263: extern int __libc_argc;
264: extern char **__libc_argv;
265:
266: /* Bash 2.0 gives us an environment variable containing flags
267: indicating ARGV elements that should not be considered arguments. */
268:
269: # ifdef USE_NONOPTION_FLAGS
270: /* Defined in getopt_init.c */
271: extern char *__getopt_nonoption_flags;
272:
273: static int nonoption_flags_max_len;
274: static int nonoption_flags_len;
275: # endif
276:
277: # ifdef USE_NONOPTION_FLAGS
278: # define SWAP_FLAGS(ch1, ch2) \
279: if (nonoption_flags_len > 0) \
280: { \
281: char __tmp = __getopt_nonoption_flags[ch1]; \
282: __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \
283: __getopt_nonoption_flags[ch2] = __tmp; \
284: }
285: # else
286: # define SWAP_FLAGS(ch1, ch2)
287: # endif
288: #else /* !_LIBC */
289: # define SWAP_FLAGS(ch1, ch2)
290: #endif /* _LIBC */
291:
292: /* Exchange two adjacent subsequences of ARGV.
293: One subsequence is elements [first_nonopt,last_nonopt)
294: which contains all the non-options that have been skipped so far.
295: The other is elements [last_nonopt,optind), which contains all
296: the options processed since those non-options were skipped.
297:
298: `first_nonopt' and `last_nonopt' are relocated so that they describe
299: the new indices of the non-options in ARGV after they are moved. */
300:
301: #if defined __STDC__ && __STDC__
302: static void exchange (char **);
303: #endif
304:
305: static void
306: exchange (argv)
307: char **argv;
308: {
309: int bottom = first_nonopt;
310: int middle = last_nonopt;
311: int top = optind;
312: char *tem;
313:
314: /* Exchange the shorter segment with the far end of the longer segment.
315: That puts the shorter segment into the right place.
316: It leaves the longer segment in the right place overall,
317: but it consists of two parts that need to be swapped next. */
318:
319: #if defined _LIBC && defined USE_NONOPTION_FLAGS
320: /* First make sure the handling of the `__getopt_nonoption_flags'
321: string can work normally. Our top argument must be in the range
322: of the string. */
323: if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len)
324: {
325: /* We must extend the array. The user plays games with us and
326: presents new arguments. */
327: char *new_str = malloc (top + 1);
328: if (new_str == NULL)
329: nonoption_flags_len = nonoption_flags_max_len = 0;
330: else
331: {
332: memset (__mempcpy (new_str, __getopt_nonoption_flags,
333: nonoption_flags_max_len),
334: '\0', top + 1 - nonoption_flags_max_len);
335: nonoption_flags_max_len = top + 1;
336: __getopt_nonoption_flags = new_str;
337: }
338: }
339: #endif
340:
341: while (top > middle && middle > bottom)
342: {
343: if (top - middle > middle - bottom)
344: {
345: /* Bottom segment is the short one. */
346: int len = middle - bottom;
347: register int i;
348:
349: /* Swap it with the top part of the top segment. */
350: for (i = 0; i < len; i++)
351: {
352: tem = argv[bottom + i];
353: argv[bottom + i] = argv[top - (middle - bottom) + i];
354: argv[top - (middle - bottom) + i] = tem;
355: SWAP_FLAGS (bottom + i, top - (middle - bottom) + i);
356: }
357: /* Exclude the moved bottom segment from further swapping. */
358: top -= len;
359: }
360: else
361: {
362: /* Top segment is the short one. */
363: int len = top - middle;
364: register int i;
365:
366: /* Swap it with the bottom part of the bottom segment. */
367: for (i = 0; i < len; i++)
368: {
369: tem = argv[bottom + i];
370: argv[bottom + i] = argv[middle + i];
371: argv[middle + i] = tem;
372: SWAP_FLAGS (bottom + i, middle + i);
373: }
374: /* Exclude the moved top segment from further swapping. */
375: bottom += len;
376: }
377: }
378:
379: /* Update records for the slots the non-options now occupy. */
380:
381: first_nonopt += (optind - last_nonopt);
382: last_nonopt = optind;
383: }
384:
385: /* Initialize the internal data when the first call is made. */
386:
387: #if defined __STDC__ && __STDC__
388: static const char *_getopt_initialize (int, char *const *, const char *);
389: #endif
390: static const char *
391: _getopt_initialize (argc, argv, optstring)
392: int argc;
393: char *const *argv;
394: const char *optstring;
395: {
396: /* Start processing options with ARGV-element 1 (since ARGV-element 0
397: is the program name); the sequence of previously skipped
398: non-option ARGV-elements is empty. */
399:
400: first_nonopt = last_nonopt = optind;
401:
402: nextchar = NULL;
403:
404: posixly_correct = getenv ("POSIXLY_CORRECT");
405:
406: /* Determine how to handle the ordering of options and nonoptions. */
407:
408: if (optstring[0] == '-')
409: {
410: ordering = RETURN_IN_ORDER;
411: ++optstring;
412: }
413: else if (optstring[0] == '+')
414: {
415: ordering = REQUIRE_ORDER;
416: ++optstring;
417: }
418: else if (posixly_correct != NULL)
419: ordering = REQUIRE_ORDER;
420: else
421: ordering = PERMUTE;
422:
423: #if defined _LIBC && defined USE_NONOPTION_FLAGS
424: if (posixly_correct == NULL
425: && argc == __libc_argc && argv == __libc_argv)
426: {
427: if (nonoption_flags_max_len == 0)
428: {
429: if (__getopt_nonoption_flags == NULL
430: || __getopt_nonoption_flags[0] == '\0')
431: nonoption_flags_max_len = -1;
432: else
433: {
434: const char *orig_str = __getopt_nonoption_flags;
435: int len = nonoption_flags_max_len = strlen (orig_str);
436: if (nonoption_flags_max_len < argc)
437: nonoption_flags_max_len = argc;
438: __getopt_nonoption_flags =
439: (char *) malloc (nonoption_flags_max_len);
440: if (__getopt_nonoption_flags == NULL)
441: nonoption_flags_max_len = -1;
442: else
443: memset (__mempcpy (__getopt_nonoption_flags, orig_str, len),
444: '\0', nonoption_flags_max_len - len);
445: }
446: }
447: nonoption_flags_len = nonoption_flags_max_len;
448: }
449: else
450: nonoption_flags_len = 0;
451: #endif
452:
453: return optstring;
454: }
455:
456: /* Scan elements of ARGV (whose length is ARGC) for option characters
457: given in OPTSTRING.
458:
459: If an element of ARGV starts with '-', and is not exactly "-" or "--",
460: then it is an option element. The characters of this element
461: (aside from the initial '-') are option characters. If `getopt'
462: is called repeatedly, it returns successively each of the option characters
463: from each of the option elements.
464:
465: If `getopt' finds another option character, it returns that character,
466: updating `optind' and `nextchar' so that the next call to `getopt' can
467: resume the scan with the following option character or ARGV-element.
468:
469: If there are no more option characters, `getopt' returns -1.
470: Then `optind' is the index in ARGV of the first ARGV-element
471: that is not an option. (The ARGV-elements have been permuted
472: so that those that are not options now come last.)
473:
474: OPTSTRING is a string containing the legitimate option characters.
475: If an option character is seen that is not listed in OPTSTRING,
476: return '?' after printing an error message. If you set `opterr' to
477: zero, the error message is suppressed but we still return '?'.
478:
479: If a char in OPTSTRING is followed by a colon, that means it wants an arg,
480: so the following text in the same ARGV-element, or the text of the following
481: ARGV-element, is returned in `optarg'. Two colons mean an option that
482: wants an optional arg; if there is text in the current ARGV-element,
483: it is returned in `optarg', otherwise `optarg' is set to zero.
484:
485: If OPTSTRING starts with `-' or `+', it requests different methods of
486: handling the non-option ARGV-elements.
487: See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
488:
489: Long-named options begin with `--' instead of `-'.
490: Their names may be abbreviated as long as the abbreviation is unique
491: or is an exact match for some defined option. If they have an
492: argument, it follows the option name in the same ARGV-element, separated
493: from the option name by a `=', or else the in next ARGV-element.
494: When `getopt' finds a long-named option, it returns 0 if that option's
495: `flag' field is nonzero, the value of the option's `val' field
496: if the `flag' field is zero.
497:
498: The elements of ARGV aren't really const, because we permute them.
499: But we pretend they're const in the prototype to be compatible
500: with other systems.
501:
502: LONGOPTS is a vector of `struct option' terminated by an
503: element containing a name which is zero.
504:
505: LONGIND returns the index in LONGOPT of the long-named option found.
506: It is only valid when a long-named option has been found by the most
507: recent call.
508:
509: If LONG_ONLY is nonzero, '-' as well as '--' can introduce
510: long-named options. */
511:
512: int
513: _getopt_internal (argc, argv, optstring, longopts, longind, long_only)
514: int argc;
515: char *const *argv;
516: const char *optstring;
517: const struct option *longopts;
518: int *longind;
519: int long_only;
520: {
521: int print_errors = opterr;
522: if (optstring[0] == ':')
523: print_errors = 0;
524:
525: if (argc < 1)
526: return -1;
527:
528: optarg = NULL;
529:
530: if (optind == 0 || !__getopt_initialized)
531: {
532: if (optind == 0)
533: optind = 1; /* Don't scan ARGV[0], the program name. */
534: optstring = _getopt_initialize (argc, argv, optstring);
535: __getopt_initialized = 1;
536: }
537:
538: /* Test whether ARGV[optind] points to a non-option argument.
539: Either it does not have option syntax, or there is an environment flag
540: from the shell indicating it is not an option. The later information
541: is only used when the used in the GNU libc. */
542: #if defined _LIBC && defined USE_NONOPTION_FLAGS
543: # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \
544: || (optind < nonoption_flags_len \
545: && __getopt_nonoption_flags[optind] == '1'))
546: #else
547: # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0')
548: #endif
549:
550: if (nextchar == NULL || *nextchar == '\0')
551: {
552: /* Advance to the next ARGV-element. */
553:
554: /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been
555: moved back by the user (who may also have changed the arguments). */
556: if (last_nonopt > optind)
557: last_nonopt = optind;
558: if (first_nonopt > optind)
559: first_nonopt = optind;
560:
561: if (ordering == PERMUTE)
562: {
563: /* If we have just processed some options following some non-options,
564: exchange them so that the options come first. */
565:
566: if (first_nonopt != last_nonopt && last_nonopt != optind)
567: exchange ((char **) argv);
568: else if (last_nonopt != optind)
569: first_nonopt = optind;
570:
571: /* Skip any additional non-options
572: and extend the range of non-options previously skipped. */
573:
574: while (optind < argc && NONOPTION_P)
575: optind++;
576: last_nonopt = optind;
577: }
578:
579: /* The special ARGV-element `--' means premature end of options.
580: Skip it like a null option,
581: then exchange with previous non-options as if it were an option,
582: then skip everything else like a non-option. */
583:
584: if (optind != argc && !strcmp (argv[optind], "--"))
585: {
586: optind++;
587:
588: if (first_nonopt != last_nonopt && last_nonopt != optind)
589: exchange ((char **) argv);
590: else if (first_nonopt == last_nonopt)
591: first_nonopt = optind;
592: last_nonopt = argc;
593:
594: optind = argc;
595: }
596:
597: /* If we have done all the ARGV-elements, stop the scan
598: and back over any non-options that we skipped and permuted. */
599:
600: if (optind == argc)
601: {
602: /* Set the next-arg-index to point at the non-options
603: that we previously skipped, so the caller will digest them. */
604: if (first_nonopt != last_nonopt)
605: optind = first_nonopt;
606: return -1;
607: }
608:
609: /* If we have come to a non-option and did not permute it,
610: either stop the scan or describe it to the caller and pass it by. */
611:
612: if (NONOPTION_P)
613: {
614: if (ordering == REQUIRE_ORDER)
615: return -1;
616: optarg = argv[optind++];
617: return 1;
618: }
619:
620: /* We have found another option-ARGV-element.
621: Skip the initial punctuation. */
622:
623: nextchar = (argv[optind] + 1
624: + (longopts != NULL && argv[optind][1] == '-'));
625: }
626:
627: /* Decode the current option-ARGV-element. */
628:
629: /* Check whether the ARGV-element is a long option.
630:
631: If long_only and the ARGV-element has the form "-f", where f is
632: a valid short option, don't consider it an abbreviated form of
633: a long option that starts with f. Otherwise there would be no
634: way to give the -f short option.
635:
636: On the other hand, if there's a long option "fubar" and
637: the ARGV-element is "-fu", do consider that an abbreviation of
638: the long option, just like "--fu", and not "-f" with arg "u".
639:
640: This distinction seems to be the most useful approach. */
641:
642: if (longopts != NULL
643: && (argv[optind][1] == '-'
644: || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1])))))
645: {
646: char *nameend;
647: const struct option *p;
648: const struct option *pfound = NULL;
649: int exact = 0;
650: int ambig = 0;
651: int indfound = -1;
652: int option_index;
653:
654: for (nameend = nextchar; *nameend && *nameend != '='; nameend++)
655: /* Do nothing. */ ;
656:
657: /* Test all long options for either exact match
658: or abbreviated matches. */
659: for (p = longopts, option_index = 0; p->name; p++, option_index++)
660: if (!strncmp (p->name, nextchar, nameend - nextchar))
661: {
662: if ((unsigned int) (nameend - nextchar)
663: == (unsigned int) strlen (p->name))
664: {
665: /* Exact match found. */
666: pfound = p;
667: indfound = option_index;
668: exact = 1;
669: break;
670: }
671: else if (pfound == NULL)
672: {
673: /* First nonexact match found. */
674: pfound = p;
675: indfound = option_index;
676: }
677: else if (long_only
678: || pfound->has_arg != p->has_arg
679: || pfound->flag != p->flag
680: || pfound->val != p->val)
681: /* Second or later nonexact match found. */
682: ambig = 1;
683: }
684:
685: if (ambig && !exact)
686: {
687: if (print_errors)
688: {
689: #if defined _LIBC && defined USE_IN_LIBIO
690: char *buf;
691:
692: if (__asprintf (&buf, _("%s: option `%s' is ambiguous\n"),
693: argv[0], argv[optind]) >= 0)
694: {
695:
696: if (_IO_fwide (stderr, 0) > 0)
697: __fwprintf (stderr, L"%s", buf);
698: else
699: fputs (buf, stderr);
700:
701: free (buf);
702: }
703: #else
704: fprintf (stderr, _("%s: option `%s' is ambiguous\n"),
705: argv[0], argv[optind]);
706: #endif
707: }
708: nextchar += strlen (nextchar);
709: optind++;
710: optopt = 0;
711: return '?';
712: }
713:
714: if (pfound != NULL)
715: {
716: option_index = indfound;
717: optind++;
718: if (*nameend)
719: {
720: /* Don't test has_arg with >, because some C compilers don't
721: allow it to be used on enums. */
722: if (pfound->has_arg)
723: optarg = nameend + 1;
724: else
725: {
726: if (print_errors)
727: {
728: #if defined _LIBC && defined USE_IN_LIBIO
729: char *buf;
730: int n;
731: #endif
732:
733: if (argv[optind - 1][1] == '-')
734: {
735: /* --option */
736: #if defined _LIBC && defined USE_IN_LIBIO
737: n = __asprintf (&buf, _("\
738: %s: option `--%s' doesn't allow an argument\n"),
739: argv[0], pfound->name);
740: #else
741: fprintf (stderr, _("\
742: %s: option `--%s' doesn't allow an argument\n"),
743: argv[0], pfound->name);
744: #endif
745: }
746: else
747: {
748: /* +option or -option */
749: #if defined _LIBC && defined USE_IN_LIBIO
750: n = __asprintf (&buf, _("\
751: %s: option `%c%s' doesn't allow an argument\n"),
752: argv[0], argv[optind - 1][0],
753: pfound->name);
754: #else
755: fprintf (stderr, _("\
756: %s: option `%c%s' doesn't allow an argument\n"),
757: argv[0], argv[optind - 1][0], pfound->name);
758: #endif
759: }
760:
761: #if defined _LIBC && defined USE_IN_LIBIO
762: if (n >= 0)
763: {
764: if (_IO_fwide (stderr, 0) > 0)
765: __fwprintf (stderr, L"%s", buf);
766: else
767: fputs (buf, stderr);
768:
769: free (buf);
770: }
771: #endif
772: }
773:
774: nextchar += strlen (nextchar);
775:
776: optopt = pfound->val;
777: return '?';
778: }
779: }
780: else if (pfound->has_arg == 1)
781: {
782: if (optind < argc)
783: optarg = argv[optind++];
784: else
785: {
786: if (print_errors)
787: {
788: #if defined _LIBC && defined USE_IN_LIBIO
789: char *buf;
790:
791: if (__asprintf (&buf, _("\
792: %s: option `%s' requires an argument\n"),
793: argv[0], argv[optind - 1]) >= 0)
794: {
795: if (_IO_fwide (stderr, 0) > 0)
796: __fwprintf (stderr, L"%s", buf);
797: else
798: fputs (buf, stderr);
799:
800: free (buf);
801: }
802: #else
803: fprintf (stderr,
804: _("%s: option `%s' requires an argument\n"),
805: argv[0], argv[optind - 1]);
806: #endif
807: }
808: nextchar += strlen (nextchar);
809: optopt = pfound->val;
810: return optstring[0] == ':' ? ':' : '?';
811: }
812: }
813: nextchar += strlen (nextchar);
814: if (longind != NULL)
815: *longind = option_index;
816: if (pfound->flag)
817: {
818: *(pfound->flag) = pfound->val;
819: return 0;
820: }
821: return pfound->val;
822: }
823:
824: /* Can't find it as a long option. If this is not getopt_long_only,
825: or the option starts with '--' or is not a valid short
826: option, then it's an error.
827: Otherwise interpret it as a short option. */
828: if (!long_only || argv[optind][1] == '-'
829: || my_index (optstring, *nextchar) == NULL)
830: {
831: if (print_errors)
832: {
833: #if defined _LIBC && defined USE_IN_LIBIO
834: char *buf;
835: int n;
836: #endif
837:
838: if (argv[optind][1] == '-')
839: {
840: /* --option */
841: #if defined _LIBC && defined USE_IN_LIBIO
842: n = __asprintf (&buf, _("%s: unrecognized option `--%s'\n"),
843: argv[0], nextchar);
844: #else
845: fprintf (stderr, _("%s: unrecognized option `--%s'\n"),
846: argv[0], nextchar);
847: #endif
848: }
849: else
850: {
851: /* +option or -option */
852: #if defined _LIBC && defined USE_IN_LIBIO
853: n = __asprintf (&buf, _("%s: unrecognized option `%c%s'\n"),
854: argv[0], argv[optind][0], nextchar);
855: #else
856: fprintf (stderr, _("%s: unrecognized option `%c%s'\n"),
857: argv[0], argv[optind][0], nextchar);
858: #endif
859: }
860:
861: #if defined _LIBC && defined USE_IN_LIBIO
862: if (n >= 0)
863: {
864: if (_IO_fwide (stderr, 0) > 0)
865: __fwprintf (stderr, L"%s", buf);
866: else
867: fputs (buf, stderr);
868:
869: free (buf);
870: }
871: #endif
872: }
873: nextchar = (char *) "";
874: optind++;
875: optopt = 0;
876: return '?';
877: }
878: }
879:
880: /* Look at and handle the next short option-character. */
881:
882: {
883: char c = *nextchar++;
884: char *temp = my_index (optstring, c);
885:
886: /* Increment `optind' when we start to process its last character. */
887: if (*nextchar == '\0')
888: ++optind;
889:
890: if (temp == NULL || c == ':')
891: {
892: if (print_errors)
893: {
894: #if defined _LIBC && defined USE_IN_LIBIO
895: char *buf;
896: int n;
897: #endif
898:
899: if (posixly_correct)
900: {
901: /* 1003.2 specifies the format of this message. */
902: #if defined _LIBC && defined USE_IN_LIBIO
903: n = __asprintf (&buf, _("%s: illegal option -- %c\n"),
904: argv[0], c);
905: #else
906: fprintf (stderr, _("%s: illegal option -- %c\n"), argv[0], c);
907: #endif
908: }
909: else
910: {
911: #if defined _LIBC && defined USE_IN_LIBIO
912: n = __asprintf (&buf, _("%s: invalid option -- %c\n"),
913: argv[0], c);
914: #else
915: fprintf (stderr, _("%s: invalid option -- %c\n"), argv[0], c);
916: #endif
917: }
918:
919: #if defined _LIBC && defined USE_IN_LIBIO
920: if (n >= 0)
921: {
922: if (_IO_fwide (stderr, 0) > 0)
923: __fwprintf (stderr, L"%s", buf);
924: else
925: fputs (buf, stderr);
926:
927: free (buf);
928: }
929: #endif
930: }
931: optopt = c;
932: return '?';
933: }
934: /* Convenience. Treat POSIX -W foo same as long option --foo */
935: if (temp[0] == 'W' && temp[1] == ';')
936: {
937: char *nameend;
938: const struct option *p;
939: const struct option *pfound = NULL;
940: int exact = 0;
941: int ambig = 0;
942: int indfound = 0;
943: int option_index;
944:
945: /* This is an option that requires an argument. */
946: if (*nextchar != '\0')
947: {
948: optarg = nextchar;
949: /* If we end this ARGV-element by taking the rest as an arg,
950: we must advance to the next element now. */
951: optind++;
952: }
953: else if (optind == argc)
954: {
955: if (print_errors)
956: {
957: /* 1003.2 specifies the format of this message. */
958: #if defined _LIBC && defined USE_IN_LIBIO
959: char *buf;
960:
961: if (__asprintf (&buf,
962: _("%s: option requires an argument -- %c\n"),
963: argv[0], c) >= 0)
964: {
965: if (_IO_fwide (stderr, 0) > 0)
966: __fwprintf (stderr, L"%s", buf);
967: else
968: fputs (buf, stderr);
969:
970: free (buf);
971: }
972: #else
973: fprintf (stderr, _("%s: option requires an argument -- %c\n"),
974: argv[0], c);
975: #endif
976: }
977: optopt = c;
978: if (optstring[0] == ':')
979: c = ':';
980: else
981: c = '?';
982: return c;
983: }
984: else
985: /* We already incremented `optind' once;
986: increment it again when taking next ARGV-elt as argument. */
987: optarg = argv[optind++];
988:
989: /* optarg is now the argument, see if it's in the
990: table of longopts. */
991:
992: for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++)
993: /* Do nothing. */ ;
994:
995: /* Test all long options for either exact match
996: or abbreviated matches. */
997: for (p = longopts, option_index = 0; p->name; p++, option_index++)
998: if (!strncmp (p->name, nextchar, nameend - nextchar))
999: {
1000: if ((unsigned int) (nameend - nextchar) == strlen (p->name))
1001: {
1002: /* Exact match found. */
1003: pfound = p;
1004: indfound = option_index;
1005: exact = 1;
1006: break;
1007: }
1008: else if (pfound == NULL)
1009: {
1010: /* First nonexact match found. */
1011: pfound = p;
1012: indfound = option_index;
1013: }
1014: else
1015: /* Second or later nonexact match found. */
1016: ambig = 1;
1017: }
1018: if (ambig && !exact)
1019: {
1020: if (print_errors)
1021: {
1022: #if defined _LIBC && defined USE_IN_LIBIO
1023: char *buf;
1024:
1025: if (__asprintf (&buf, _("%s: option `-W %s' is ambiguous\n"),
1026: argv[0], argv[optind]) >= 0)
1027: {
1028: if (_IO_fwide (stderr, 0) > 0)
1029: __fwprintf (stderr, L"%s", buf);
1030: else
1031: fputs (buf, stderr);
1032:
1033: free (buf);
1034: }
1035: #else
1036: fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"),
1037: argv[0], argv[optind]);
1038: #endif
1039: }
1040: nextchar += strlen (nextchar);
1041: optind++;
1042: return '?';
1043: }
1044: if (pfound != NULL)
1045: {
1046: option_index = indfound;
1047: if (*nameend)
1048: {
1049: /* Don't test has_arg with >, because some C compilers don't
1050: allow it to be used on enums. */
1051: if (pfound->has_arg)
1052: optarg = nameend + 1;
1053: else
1054: {
1055: if (print_errors)
1056: {
1057: #if defined _LIBC && defined USE_IN_LIBIO
1058: char *buf;
1059:
1060: if (__asprintf (&buf, _("\
1061: %s: option `-W %s' doesn't allow an argument\n"),
1062: argv[0], pfound->name) >= 0)
1063: {
1064: if (_IO_fwide (stderr, 0) > 0)
1065: __fwprintf (stderr, L"%s", buf);
1066: else
1067: fputs (buf, stderr);
1068:
1069: free (buf);
1070: }
1071: #else
1072: fprintf (stderr, _("\
1073: %s: option `-W %s' doesn't allow an argument\n"),
1074: argv[0], pfound->name);
1075: #endif
1076: }
1077:
1078: nextchar += strlen (nextchar);
1079: return '?';
1080: }
1081: }
1082: else if (pfound->has_arg == 1)
1083: {
1084: if (optind < argc)
1085: optarg = argv[optind++];
1086: else
1087: {
1088: if (print_errors)
1089: {
1090: #if defined _LIBC && defined USE_IN_LIBIO
1091: char *buf;
1092:
1093: if (__asprintf (&buf, _("\
1094: %s: option `%s' requires an argument\n"),
1095: argv[0], argv[optind - 1]) >= 0)
1096: {
1097: if (_IO_fwide (stderr, 0) > 0)
1098: __fwprintf (stderr, L"%s", buf);
1099: else
1100: fputs (buf, stderr);
1101:
1102: free (buf);
1103: }
1104: #else
1105: fprintf (stderr,
1106: _("%s: option `%s' requires an argument\n"),
1107: argv[0], argv[optind - 1]);
1108: #endif
1109: }
1110: nextchar += strlen (nextchar);
1111: return optstring[0] == ':' ? ':' : '?';
1112: }
1113: }
1114: nextchar += strlen (nextchar);
1115: if (longind != NULL)
1116: *longind = option_index;
1117: if (pfound->flag)
1118: {
1119: *(pfound->flag) = pfound->val;
1120: return 0;
1121: }
1122: return pfound->val;
1123: }
1124: nextchar = NULL;
1125: return 'W'; /* Let the application handle it. */
1126: }
1127: if (temp[1] == ':')
1128: {
1129: if (temp[2] == ':')
1130: {
1131: /* This is an option that accepts an argument optionally. */
1132: if (*nextchar != '\0')
1133: {
1134: optarg = nextchar;
1135: optind++;
1136: }
1137: else
1138: optarg = NULL;
1139: nextchar = NULL;
1140: }
1141: else
1142: {
1143: /* This is an option that requires an argument. */
1144: if (*nextchar != '\0')
1145: {
1146: optarg = nextchar;
1147: /* If we end this ARGV-element by taking the rest as an arg,
1148: we must advance to the next element now. */
1149: optind++;
1150: }
1151: else if (optind == argc)
1152: {
1153: if (print_errors)
1154: {
1155: /* 1003.2 specifies the format of this message. */
1156: #if defined _LIBC && defined USE_IN_LIBIO
1157: char *buf;
1158:
1159: if (__asprintf (&buf, _("\
1160: %s: option requires an argument -- %c\n"),
1161: argv[0], c) >= 0)
1162: {
1163: if (_IO_fwide (stderr, 0) > 0)
1164: __fwprintf (stderr, L"%s", buf);
1165: else
1166: fputs (buf, stderr);
1167:
1168: free (buf);
1169: }
1170: #else
1171: fprintf (stderr,
1172: _("%s: option requires an argument -- %c\n"),
1173: argv[0], c);
1174: #endif
1175: }
1176: optopt = c;
1177: if (optstring[0] == ':')
1178: c = ':';
1179: else
1180: c = '?';
1181: }
1182: else
1183: /* We already incremented `optind' once;
1184: increment it again when taking next ARGV-elt as argument. */
1185: optarg = argv[optind++];
1186: nextchar = NULL;
1187: }
1188: }
1189: return c;
1190: }
1191: }
1192:
1193: int
1194: getopt (argc, argv, optstring)
1195: int argc;
1196: char *const *argv;
1197: const char *optstring;
1198: {
1199: return _getopt_internal (argc, argv, optstring,
1200: (const struct option *) 0,
1201: (int *) 0,
1202: 0);
1203: }
1204:
1205: #endif /* Not ELIDE_CODE. */
1206:
1207: #ifdef TEST
1208:
1209: /* Compile with -DTEST to make an executable for use in testing
1210: the above definition of `getopt'. */
1211:
1212: int
1213: main (argc, argv)
1214: int argc;
1215: char **argv;
1216: {
1217: int c;
1218: int digit_optind = 0;
1219:
1220: while (1)
1221: {
1222: int this_option_optind = optind ? optind : 1;
1223:
1224: c = getopt (argc, argv, "abc:d:0123456789");
1225: if (c == -1)
1226: break;
1227:
1228: switch (c)
1229: {
1230: case '0':
1231: case '1':
1232: case '2':
1233: case '3':
1234: case '4':
1235: case '5':
1236: case '6':
1237: case '7':
1238: case '8':
1239: case '9':
1240: if (digit_optind != 0 && digit_optind != this_option_optind)
1241: printf ("digits occur in two different argv-elements.\n");
1242: digit_optind = this_option_optind;
1243: printf ("option %c\n", c);
1244: break;
1245:
1246: case 'a':
1247: printf ("option a\n");
1248: break;
1249:
1250: case 'b':
1251: printf ("option b\n");
1252: break;
1253:
1254: case 'c':
1255: printf ("option c with value `%s'\n", optarg);
1256: break;
1257:
1258: case '?':
1259: break;
1260:
1261: default:
1262: printf ("?? getopt returned character code 0%o ??\n", c);
1263: }
1264: }
1265:
1266: if (optind < argc)
1267: {
1268: printf ("non-option ARGV-elements: ");
1269: while (optind < argc)
1270: printf ("%s ", argv[optind++]);
1271: printf ("\n");
1272: }
1273:
1274: exit (0);
1275: }
1276:
1277: #endif /* TEST */
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