Annotation of coherent/g/usr/bin/gzip/getopt.c, revision 1.1

1.1     ! root        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 [email protected]
        !             4:    before changing it!
        !             5: 
        !             6:    Copyright (C) 1987, 88, 89, 90, 91, 1992 Free Software Foundation, Inc.
        !             7: 
        !             8:    This program is free software; you can redistribute it and/or modify it
        !             9:    under the terms of the GNU General Public License as published by the
        !            10:    Free Software Foundation; either version 2, or (at your option) any
        !            11:    later version.
        !            12:    
        !            13:    This program is distributed in the hope that it will be useful,
        !            14:    but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            15:    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            16:    GNU General Public License for more details.
        !            17:    
        !            18:    You should have received a copy of the GNU General Public License
        !            19:    along with this program; if not, write to the Free Software
        !            20:    Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
        !            21: 
        !            22: /* AIX requires this to be the first thing in the file.  */
        !            23: #ifdef __GNUC__
        !            24: #define alloca __builtin_alloca
        !            25: #else /* not __GNUC__ */
        !            26: #if defined (HAVE_ALLOCA_H) || (defined(sparc) && (defined(sun) || (!defined(USG) && !defined(SVR4) && !defined(__svr4__))))
        !            27: #include <alloca.h>
        !            28: #else
        !            29: #ifdef _AIX
        !            30:  #pragma alloca
        !            31: #else
        !            32: char *alloca ();
        !            33: #endif
        !            34: #endif /* alloca.h */
        !            35: #endif /* not __GNUC__ */
        !            36: 
        !            37: #include <stdio.h>
        !            38: 
        !            39: #if defined(USG) || defined(STDC_HEADERS) || defined(__GNU_LIBRARY__)
        !            40: #include <string.h>
        !            41: #endif
        !            42: 
        !            43: /* This needs to come after some library #include
        !            44:    to get __GNU_LIBRARY__ defined.  */
        !            45: #ifdef __GNU_LIBRARY__
        !            46: #undef alloca
        !            47: /* Don't include stdlib.h for non-GNU C libraries because some of them
        !            48:    contain conflicting prototypes for getopt.  */
        !            49: #include <stdlib.h>
        !            50: #else  /* Not GNU C library.  */
        !            51: #define        __alloca        alloca
        !            52: #endif /* GNU C library.  */
        !            53: 
        !            54: #if !__STDC__
        !            55: #define const
        !            56: #endif
        !            57: 
        !            58: /* If GETOPT_COMPAT is defined, `+' as well as `--' can introduce a
        !            59:    long-named option.  Because this is not POSIX.2 compliant, it is
        !            60:    being phased out.  */
        !            61: #define GETOPT_COMPAT
        !            62: 
        !            63: /* This version of `getopt' appears to the caller like standard Unix `getopt'
        !            64:    but it behaves differently for the user, since it allows the user
        !            65:    to intersperse the options with the other arguments.
        !            66: 
        !            67:    As `getopt' works, it permutes the elements of ARGV so that,
        !            68:    when it is done, all the options precede everything else.  Thus
        !            69:    all application programs are extended to handle flexible argument order.
        !            70: 
        !            71:    Setting the environment variable POSIXLY_CORRECT disables permutation.
        !            72:    Then the behavior is completely standard.
        !            73: 
        !            74:    GNU application programs can use a third alternative mode in which
        !            75:    they can distinguish the relative order of options and other arguments.  */
        !            76: 
        !            77: #include "getopt.h"
        !            78: 
        !            79: /* For communication from `getopt' to the caller.
        !            80:    When `getopt' finds an option that takes an argument,
        !            81:    the argument value is returned here.
        !            82:    Also, when `ordering' is RETURN_IN_ORDER,
        !            83:    each non-option ARGV-element is returned here.  */
        !            84: 
        !            85: char *optarg = 0;
        !            86: 
        !            87: /* Index in ARGV of the next element to be scanned.
        !            88:    This is used for communication to and from the caller
        !            89:    and for communication between successive calls to `getopt'.
        !            90: 
        !            91:    On entry to `getopt', zero means this is the first call; initialize.
        !            92: 
        !            93:    When `getopt' returns EOF, this is the index of the first of the
        !            94:    non-option elements that the caller should itself scan.
        !            95: 
        !            96:    Otherwise, `optind' communicates from one call to the next
        !            97:    how much of ARGV has been scanned so far.  */
        !            98: 
        !            99: int optind = 0;
        !           100: 
        !           101: /* The next char to be scanned in the option-element
        !           102:    in which the last option character we returned was found.
        !           103:    This allows us to pick up the scan where we left off.
        !           104: 
        !           105:    If this is zero, or a null string, it means resume the scan
        !           106:    by advancing to the next ARGV-element.  */
        !           107: 
        !           108: static char *nextchar;
        !           109: 
        !           110: /* Callers store zero here to inhibit the error message
        !           111:    for unrecognized options.  */
        !           112: 
        !           113: int opterr = 1;
        !           114: 
        !           115: /* Describe how to deal with options that follow non-option ARGV-elements.
        !           116: 
        !           117:    If the caller did not specify anything,
        !           118:    the default is REQUIRE_ORDER if the environment variable
        !           119:    POSIXLY_CORRECT is defined, PERMUTE otherwise.
        !           120: 
        !           121:    REQUIRE_ORDER means don't recognize them as options;
        !           122:    stop option processing when the first non-option is seen.
        !           123:    This is what Unix does.
        !           124:    This mode of operation is selected by either setting the environment
        !           125:    variable POSIXLY_CORRECT, or using `+' as the first character
        !           126:    of the list of option characters.
        !           127: 
        !           128:    PERMUTE is the default.  We permute the contents of ARGV as we scan,
        !           129:    so that eventually all the non-options are at the end.  This allows options
        !           130:    to be given in any order, even with programs that were not written to
        !           131:    expect this.
        !           132: 
        !           133:    RETURN_IN_ORDER is an option available to programs that were written
        !           134:    to expect options and other ARGV-elements in any order and that care about
        !           135:    the ordering of the two.  We describe each non-option ARGV-element
        !           136:    as if it were the argument of an option with character code 1.
        !           137:    Using `-' as the first character of the list of option characters
        !           138:    selects this mode of operation.
        !           139: 
        !           140:    The special argument `--' forces an end of option-scanning regardless
        !           141:    of the value of `ordering'.  In the case of RETURN_IN_ORDER, only
        !           142:    `--' can cause `getopt' to return EOF with `optind' != ARGC.  */
        !           143: 
        !           144: static enum
        !           145: {
        !           146:   REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
        !           147: } ordering;
        !           148: 
        !           149: #ifdef __GNU_LIBRARY__
        !           150: #include <string.h>
        !           151: #define        my_index        strchr
        !           152: #define        my_bcopy(src, dst, n)   memcpy ((dst), (src), (n))
        !           153: #else
        !           154: 
        !           155: /* Avoid depending on library functions or files
        !           156:    whose names are inconsistent.  */
        !           157: 
        !           158: char *getenv ();
        !           159: 
        !           160: static char *
        !           161: my_index (string, chr)
        !           162:      char *string;
        !           163:      int chr;
        !           164: {
        !           165:   while (*string)
        !           166:     {
        !           167:       if (*string == chr)
        !           168:        return string;
        !           169:       string++;
        !           170:     }
        !           171:   return 0;
        !           172: }
        !           173: 
        !           174: static void
        !           175: my_bcopy (from, to, size)
        !           176:      char *from, *to;
        !           177:      int size;
        !           178: {
        !           179:   int i;
        !           180:   for (i = 0; i < size; i++)
        !           181:     to[i] = from[i];
        !           182: }
        !           183: #endif                         /* GNU C library.  */
        !           184: 
        !           185: /* Handle permutation of arguments.  */
        !           186: 
        !           187: /* Describe the part of ARGV that contains non-options that have
        !           188:    been skipped.  `first_nonopt' is the index in ARGV of the first of them;
        !           189:    `last_nonopt' is the index after the last of them.  */
        !           190: 
        !           191: static int first_nonopt;
        !           192: static int last_nonopt;
        !           193: 
        !           194: /* Exchange two adjacent subsequences of ARGV.
        !           195:    One subsequence is elements [first_nonopt,last_nonopt)
        !           196:    which contains all the non-options that have been skipped so far.
        !           197:    The other is elements [last_nonopt,optind), which contains all
        !           198:    the options processed since those non-options were skipped.
        !           199: 
        !           200:    `first_nonopt' and `last_nonopt' are relocated so that they describe
        !           201:    the new indices of the non-options in ARGV after they are moved.  */
        !           202: 
        !           203: static void
        !           204: exchange (argv)
        !           205:      char **argv;
        !           206: {
        !           207:   int nonopts_size = (last_nonopt - first_nonopt) * sizeof (char *);
        !           208:   char **temp = (char **) __alloca (nonopts_size);
        !           209: 
        !           210:   /* Interchange the two blocks of data in ARGV.  */
        !           211: 
        !           212:   my_bcopy ((char *) &argv[first_nonopt], (char *) temp, nonopts_size);
        !           213:   my_bcopy ((char *) &argv[last_nonopt], (char *) &argv[first_nonopt],
        !           214:            (optind - last_nonopt) * sizeof (char *));
        !           215:   my_bcopy ((char *) temp,
        !           216:            (char *) &argv[first_nonopt + optind - last_nonopt],
        !           217:            nonopts_size);
        !           218: 
        !           219:   /* Update records for the slots the non-options now occupy.  */
        !           220: 
        !           221:   first_nonopt += (optind - last_nonopt);
        !           222:   last_nonopt = optind;
        !           223: }
        !           224: 
        !           225: /* Scan elements of ARGV (whose length is ARGC) for option characters
        !           226:    given in OPTSTRING.
        !           227: 
        !           228:    If an element of ARGV starts with '-', and is not exactly "-" or "--",
        !           229:    then it is an option element.  The characters of this element
        !           230:    (aside from the initial '-') are option characters.  If `getopt'
        !           231:    is called repeatedly, it returns successively each of the option characters
        !           232:    from each of the option elements.
        !           233: 
        !           234:    If `getopt' finds another option character, it returns that character,
        !           235:    updating `optind' and `nextchar' so that the next call to `getopt' can
        !           236:    resume the scan with the following option character or ARGV-element.
        !           237: 
        !           238:    If there are no more option characters, `getopt' returns `EOF'.
        !           239:    Then `optind' is the index in ARGV of the first ARGV-element
        !           240:    that is not an option.  (The ARGV-elements have been permuted
        !           241:    so that those that are not options now come last.)
        !           242: 
        !           243:    OPTSTRING is a string containing the legitimate option characters.
        !           244:    If an option character is seen that is not listed in OPTSTRING,
        !           245:    return '?' after printing an error message.  If you set `opterr' to
        !           246:    zero, the error message is suppressed but we still return '?'.
        !           247: 
        !           248:    If a char in OPTSTRING is followed by a colon, that means it wants an arg,
        !           249:    so the following text in the same ARGV-element, or the text of the following
        !           250:    ARGV-element, is returned in `optarg'.  Two colons mean an option that
        !           251:    wants an optional arg; if there is text in the current ARGV-element,
        !           252:    it is returned in `optarg', otherwise `optarg' is set to zero.
        !           253: 
        !           254:    If OPTSTRING starts with `-' or `+', it requests different methods of
        !           255:    handling the non-option ARGV-elements.
        !           256:    See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
        !           257: 
        !           258:    Long-named options begin with `--' instead of `-'.
        !           259:    Their names may be abbreviated as long as the abbreviation is unique
        !           260:    or is an exact match for some defined option.  If they have an
        !           261:    argument, it follows the option name in the same ARGV-element, separated
        !           262:    from the option name by a `=', or else the in next ARGV-element.
        !           263:    When `getopt' finds a long-named option, it returns 0 if that option's
        !           264:    `flag' field is nonzero, the value of the option's `val' field
        !           265:    if the `flag' field is zero.
        !           266: 
        !           267:    The elements of ARGV aren't really const, because we permute them.
        !           268:    But we pretend they're const in the prototype to be compatible
        !           269:    with other systems.
        !           270: 
        !           271:    LONGOPTS is a vector of `struct option' terminated by an
        !           272:    element containing a name which is zero.
        !           273: 
        !           274:    LONGIND returns the index in LONGOPT of the long-named option found.
        !           275:    It is only valid when a long-named option has been found by the most
        !           276:    recent call.
        !           277: 
        !           278:    If LONG_ONLY is nonzero, '-' as well as '--' can introduce
        !           279:    long-named options.  */
        !           280: 
        !           281: int
        !           282: _getopt_internal (argc, argv, optstring, longopts, longind, long_only)
        !           283:      int argc;
        !           284:      char *const *argv;
        !           285:      const char *optstring;
        !           286:      const struct option *longopts;
        !           287:      int *longind;
        !           288:      int long_only;
        !           289: {
        !           290:   int option_index;
        !           291: 
        !           292:   optarg = 0;
        !           293: 
        !           294:   /* Initialize the internal data when the first call is made.
        !           295:      Start processing options with ARGV-element 1 (since ARGV-element 0
        !           296:      is the program name); the sequence of previously skipped
        !           297:      non-option ARGV-elements is empty.  */
        !           298: 
        !           299:   if (optind == 0)
        !           300:     {
        !           301:       first_nonopt = last_nonopt = optind = 1;
        !           302: 
        !           303:       nextchar = NULL;
        !           304: 
        !           305:       /* Determine how to handle the ordering of options and nonoptions.  */
        !           306: 
        !           307:       if (optstring[0] == '-')
        !           308:        {
        !           309:          ordering = RETURN_IN_ORDER;
        !           310:          ++optstring;
        !           311:        }
        !           312:       else if (optstring[0] == '+')
        !           313:        {
        !           314:          ordering = REQUIRE_ORDER;
        !           315:          ++optstring;
        !           316:        }
        !           317:       else if (getenv ("POSIXLY_CORRECT") != NULL)
        !           318:        ordering = REQUIRE_ORDER;
        !           319:       else
        !           320:        ordering = PERMUTE;
        !           321:     }
        !           322: 
        !           323:   if (nextchar == NULL || *nextchar == '\0')
        !           324:     {
        !           325:       if (ordering == PERMUTE)
        !           326:        {
        !           327:          /* If we have just processed some options following some non-options,
        !           328:             exchange them so that the options come first.  */
        !           329: 
        !           330:          if (first_nonopt != last_nonopt && last_nonopt != optind)
        !           331:            exchange ((char **) argv);
        !           332:          else if (last_nonopt != optind)
        !           333:            first_nonopt = optind;
        !           334: 
        !           335:          /* Now skip any additional non-options
        !           336:             and extend the range of non-options previously skipped.  */
        !           337: 
        !           338:          while (optind < argc
        !           339:                 && (argv[optind][0] != '-' || argv[optind][1] == '\0')
        !           340: #ifdef GETOPT_COMPAT
        !           341:                 && (longopts == NULL
        !           342:                     || argv[optind][0] != '+' || argv[optind][1] == '\0')
        !           343: #endif                         /* GETOPT_COMPAT */
        !           344:                 )
        !           345:            optind++;
        !           346:          last_nonopt = optind;
        !           347:        }
        !           348: 
        !           349:       /* Special ARGV-element `--' means premature end of options.
        !           350:         Skip it like a null option,
        !           351:         then exchange with previous non-options as if it were an option,
        !           352:         then skip everything else like a non-option.  */
        !           353: 
        !           354:       if (optind != argc && !strcmp (argv[optind], "--"))
        !           355:        {
        !           356:          optind++;
        !           357: 
        !           358:          if (first_nonopt != last_nonopt && last_nonopt != optind)
        !           359:            exchange ((char **) argv);
        !           360:          else if (first_nonopt == last_nonopt)
        !           361:            first_nonopt = optind;
        !           362:          last_nonopt = argc;
        !           363: 
        !           364:          optind = argc;
        !           365:        }
        !           366: 
        !           367:       /* If we have done all the ARGV-elements, stop the scan
        !           368:         and back over any non-options that we skipped and permuted.  */
        !           369: 
        !           370:       if (optind == argc)
        !           371:        {
        !           372:          /* Set the next-arg-index to point at the non-options
        !           373:             that we previously skipped, so the caller will digest them.  */
        !           374:          if (first_nonopt != last_nonopt)
        !           375:            optind = first_nonopt;
        !           376:          return EOF;
        !           377:        }
        !           378: 
        !           379:       /* If we have come to a non-option and did not permute it,
        !           380:         either stop the scan or describe it to the caller and pass it by.  */
        !           381: 
        !           382:       if ((argv[optind][0] != '-' || argv[optind][1] == '\0')
        !           383: #ifdef GETOPT_COMPAT
        !           384:          && (longopts == NULL
        !           385:              || argv[optind][0] != '+' || argv[optind][1] == '\0')
        !           386: #endif                         /* GETOPT_COMPAT */
        !           387:          )
        !           388:        {
        !           389:          if (ordering == REQUIRE_ORDER)
        !           390:            return EOF;
        !           391:          optarg = argv[optind++];
        !           392:          return 1;
        !           393:        }
        !           394: 
        !           395:       /* We have found another option-ARGV-element.
        !           396:         Start decoding its characters.  */
        !           397: 
        !           398:       nextchar = (argv[optind] + 1
        !           399:                  + (longopts != NULL && argv[optind][1] == '-'));
        !           400:     }
        !           401: 
        !           402:   if (longopts != NULL
        !           403:       && ((argv[optind][0] == '-'
        !           404:           && (argv[optind][1] == '-' || long_only))
        !           405: #ifdef GETOPT_COMPAT
        !           406:          || argv[optind][0] == '+'
        !           407: #endif                         /* GETOPT_COMPAT */
        !           408:          ))
        !           409:     {
        !           410:       const struct option *p;
        !           411:       char *s = nextchar;
        !           412:       int exact = 0;
        !           413:       int ambig = 0;
        !           414:       const struct option *pfound = NULL;
        !           415:       int indfound;
        !           416: 
        !           417:       while (*s && *s != '=')
        !           418:        s++;
        !           419: 
        !           420:       /* Test all options for either exact match or abbreviated matches.  */
        !           421:       for (p = longopts, option_index = 0; p->name;
        !           422:           p++, option_index++)
        !           423:        if (!strncmp (p->name, nextchar, s - nextchar))
        !           424:          {
        !           425:            if (s - nextchar == strlen (p->name))
        !           426:              {
        !           427:                /* Exact match found.  */
        !           428:                pfound = p;
        !           429:                indfound = option_index;
        !           430:                exact = 1;
        !           431:                break;
        !           432:              }
        !           433:            else if (pfound == NULL)
        !           434:              {
        !           435:                /* First nonexact match found.  */
        !           436:                pfound = p;
        !           437:                indfound = option_index;
        !           438:              }
        !           439:            else
        !           440:              /* Second nonexact match found.  */
        !           441:              ambig = 1;
        !           442:          }
        !           443: 
        !           444:       if (ambig && !exact)
        !           445:        {
        !           446:          if (opterr)
        !           447:            fprintf (stderr, "%s: option `%s' is ambiguous\n",
        !           448:                     argv[0], argv[optind]);
        !           449:          nextchar += strlen (nextchar);
        !           450:          optind++;
        !           451:          return '?';
        !           452:        }
        !           453: 
        !           454:       if (pfound != NULL)
        !           455:        {
        !           456:          option_index = indfound;
        !           457:          optind++;
        !           458:          if (*s)
        !           459:            {
        !           460:              /* Don't test has_arg with >, because some C compilers don't
        !           461:                 allow it to be used on enums.  */
        !           462:              if (pfound->has_arg)
        !           463:                optarg = s + 1;
        !           464:              else
        !           465:                {
        !           466:                  if (opterr)
        !           467:                    {
        !           468:                      if (argv[optind - 1][1] == '-')
        !           469:                        /* --option */
        !           470:                        fprintf (stderr,
        !           471:                                 "%s: option `--%s' doesn't allow an argument\n",
        !           472:                                 argv[0], pfound->name);
        !           473:                      else
        !           474:                        /* +option or -option */
        !           475:                        fprintf (stderr,
        !           476:                             "%s: option `%c%s' doesn't allow an argument\n",
        !           477:                             argv[0], argv[optind - 1][0], pfound->name);
        !           478:                    }
        !           479:                  nextchar += strlen (nextchar);
        !           480:                  return '?';
        !           481:                }
        !           482:            }
        !           483:          else if (pfound->has_arg == 1)
        !           484:            {
        !           485:              if (optind < argc)
        !           486:                optarg = argv[optind++];
        !           487:              else
        !           488:                {
        !           489:                  if (opterr)
        !           490:                    fprintf (stderr, "%s: option `%s' requires an argument\n",
        !           491:                             argv[0], argv[optind - 1]);
        !           492:                  nextchar += strlen (nextchar);
        !           493:                  return '?';
        !           494:                }
        !           495:            }
        !           496:          nextchar += strlen (nextchar);
        !           497:          if (longind != NULL)
        !           498:            *longind = option_index;
        !           499:          if (pfound->flag)
        !           500:            {
        !           501:              *(pfound->flag) = pfound->val;
        !           502:              return 0;
        !           503:            }
        !           504:          return pfound->val;
        !           505:        }
        !           506:       /* Can't find it as a long option.  If this is not getopt_long_only,
        !           507:         or the option starts with '--' or is not a valid short
        !           508:         option, then it's an error.
        !           509:         Otherwise interpret it as a short option.  */
        !           510:       if (!long_only || argv[optind][1] == '-'
        !           511: #ifdef GETOPT_COMPAT
        !           512:          || argv[optind][0] == '+'
        !           513: #endif                         /* GETOPT_COMPAT */
        !           514:          || my_index (optstring, *nextchar) == NULL)
        !           515:        {
        !           516:          if (opterr)
        !           517:            {
        !           518:              if (argv[optind][1] == '-')
        !           519:                /* --option */
        !           520:                fprintf (stderr, "%s: unrecognized option `--%s'\n",
        !           521:                         argv[0], nextchar);
        !           522:              else
        !           523:                /* +option or -option */
        !           524:                fprintf (stderr, "%s: unrecognized option `%c%s'\n",
        !           525:                         argv[0], argv[optind][0], nextchar);
        !           526:            }
        !           527:          nextchar = (char *) "";
        !           528:          optind++;
        !           529:          return '?';
        !           530:        }
        !           531:     }
        !           532: 
        !           533:   /* Look at and handle the next option-character.  */
        !           534: 
        !           535:   {
        !           536:     char c = *nextchar++;
        !           537:     char *temp = my_index (optstring, c);
        !           538: 
        !           539:     /* Increment `optind' when we start to process its last character.  */
        !           540:     if (*nextchar == '\0')
        !           541:       ++optind;
        !           542: 
        !           543:     if (temp == NULL || c == ':')
        !           544:       {
        !           545:        if (opterr)
        !           546:          {
        !           547:            if (c < 040 || c >= 0177)
        !           548:              fprintf (stderr, "%s: unrecognized option, character code 0%o\n",
        !           549:                       argv[0], c);
        !           550:            else
        !           551:              fprintf (stderr, "%s: unrecognized option `-%c'\n", argv[0], c);
        !           552:          }
        !           553:        return '?';
        !           554:       }
        !           555:     if (temp[1] == ':')
        !           556:       {
        !           557:        if (temp[2] == ':')
        !           558:          {
        !           559:            /* This is an option that accepts an argument optionally.  */
        !           560:            if (*nextchar != '\0')
        !           561:              {
        !           562:                optarg = nextchar;
        !           563:                optind++;
        !           564:              }
        !           565:            else
        !           566:              optarg = 0;
        !           567:            nextchar = NULL;
        !           568:          }
        !           569:        else
        !           570:          {
        !           571:            /* This is an option that requires an argument.  */
        !           572:            if (*nextchar != '\0')
        !           573:              {
        !           574:                optarg = nextchar;
        !           575:                /* If we end this ARGV-element by taking the rest as an arg,
        !           576:                   we must advance to the next element now.  */
        !           577:                optind++;
        !           578:              }
        !           579:            else if (optind == argc)
        !           580:              {
        !           581:                if (opterr)
        !           582:                  fprintf (stderr, "%s: option `-%c' requires an argument\n",
        !           583:                           argv[0], c);
        !           584:                c = '?';
        !           585:              }
        !           586:            else
        !           587:              /* We already incremented `optind' once;
        !           588:                 increment it again when taking next ARGV-elt as argument.  */
        !           589:              optarg = argv[optind++];
        !           590:            nextchar = NULL;
        !           591:          }
        !           592:       }
        !           593:     return c;
        !           594:   }
        !           595: }
        !           596: 
        !           597: int
        !           598: getopt (argc, argv, optstring)
        !           599:      int argc;
        !           600:      char *const *argv;
        !           601:      const char *optstring;
        !           602: {
        !           603:   return _getopt_internal (argc, argv, optstring,
        !           604:                           (const struct option *) 0,
        !           605:                           (int *) 0,
        !           606:                           0);
        !           607: }
        !           608: 
        !           609: int
        !           610: getopt_long (argc, argv, options, long_options, opt_index)
        !           611:      int argc;
        !           612:      char *const *argv;
        !           613:      const char *options;
        !           614:      const struct option *long_options;
        !           615:      int *opt_index;
        !           616: {
        !           617:   return _getopt_internal (argc, argv, options, long_options, opt_index, 0);
        !           618: }
        !           619: 
        !           620: /* Like getopt_long, but '-' as well as '--' can indicate a long option.
        !           621:    If an option that starts with '-' (not '--') doesn't match a long option,
        !           622:    but does match a short option, it is parsed as a short option
        !           623:    instead. */
        !           624: 
        !           625: int 
        !           626: getopt_long_only (argc, argv, options, long_options, opt_index)
        !           627:      int argc;
        !           628:      char *const *argv;
        !           629:      const char *options;
        !           630:      const struct option *long_options;
        !           631:      int *opt_index;
        !           632: {
        !           633:   return _getopt_internal (argc, argv, options, long_options, opt_index, 1);
        !           634: }
        !           635: 
        !           636: 
        !           637: #ifdef TEST
        !           638: 
        !           639: /* Compile with -DTEST to make an executable for use in testing
        !           640:    the above definition of `getopt'.  */
        !           641: 
        !           642: int
        !           643: main (argc, argv)
        !           644:      int argc;
        !           645:      char **argv;
        !           646: {
        !           647:   int c;
        !           648:   int digit_optind = 0;
        !           649: 
        !           650:   while (1)
        !           651:     {
        !           652:       int this_option_optind = optind ? optind : 1;
        !           653: 
        !           654:       c = getopt (argc, argv, "abc:d:0123456789");
        !           655:       if (c == EOF)
        !           656:        break;
        !           657: 
        !           658:       switch (c)
        !           659:        {
        !           660:        case '0':
        !           661:        case '1':
        !           662:        case '2':
        !           663:        case '3':
        !           664:        case '4':
        !           665:        case '5':
        !           666:        case '6':
        !           667:        case '7':
        !           668:        case '8':
        !           669:        case '9':
        !           670:          if (digit_optind != 0 && digit_optind != this_option_optind)
        !           671:            printf ("digits occur in two different argv-elements.\n");
        !           672:          digit_optind = this_option_optind;
        !           673:          printf ("option %c\n", c);
        !           674:          break;
        !           675: 
        !           676:        case 'a':
        !           677:          printf ("option a\n");
        !           678:          break;
        !           679: 
        !           680:        case 'b':
        !           681:          printf ("option b\n");
        !           682:          break;
        !           683: 
        !           684:        case 'c':
        !           685:          printf ("option c with value `%s'\n", optarg);
        !           686:          break;
        !           687: 
        !           688:        case '?':
        !           689:          break;
        !           690: 
        !           691:        default:
        !           692:          printf ("?? getopt returned character code 0%o ??\n", c);
        !           693:        }
        !           694:     }
        !           695: 
        !           696:   if (optind < argc)
        !           697:     {
        !           698:       printf ("non-option ARGV-elements: ");
        !           699:       while (optind < argc)
        !           700:        printf ("%s ", argv[optind++]);
        !           701:       printf ("\n");
        !           702:     }
        !           703: 
        !           704:   exit (0);
        !           705: }
        !           706: 
        !           707: #endif /* TEST */

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