File indexing completed on 2024-12-22 04:04:11

 /* 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 drepper@gnu.org
    before changing it!
 
    Copyright (C) 1987, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 2000
     Free Software Foundation, Inc.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public License as
    published by the Free Software Foundation; either version 2 of the
    License, or (at your option) any later version.
 
    The GNU C Library 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
    Library General Public License for more details.
 
    You should have received a copy of the GNU Library General Public
    License along with the GNU C Library; see the file COPYING.LIB.  If not,
    write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA 02110-1301, USA.  */
 
 /* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>.
    Ditto for AIX 3.2 and <stdlib.h>.  */
 #ifndef _NO_PROTO
 # define _NO_PROTO
 #endif
 
 #ifdef HAVE_CONFIG_H
 # include <config.h>
 #endif
 
 #if !defined __STDC__ || !__STDC__
 /* This is a separate conditional since some stdc systems
    reject `defined (const)'.  */
 # ifndef const
 #  define const
 # endif
 #endif
 
 #include <stdio.h>
 
 /* This needs to come after some library #include
    to get __GNU_LIBRARY__ defined.  */
 #ifdef  __GNU_LIBRARY__
 /* Don't include stdlib.h for non-GNU C libraries because some of them
    contain conflicting prototypes for getopt.  */
 # include <stdlib.h>
 # include <unistd.h>
 #endif  /* GNU C library.  */
 
 #ifdef VMS
 # include <unixlib.h>
 # if HAVE_STRING_H - 0
 #  include <string.h>
 # endif
 #endif
 
 #ifndef _
 /* This is for other GNU distributions with internationalized messages.  */
 # if defined HAVE_LIBINTL_H || defined _LIBC
 #  include <libintl.h>
 #  ifndef _
 #   define _(msgid) gettext (msgid)
 #  endif
 # else
 #  define _(msgid)  (msgid)
 # endif
 #endif
 
 /* 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 "getopt.h"
 
 /* For communication from `getopt' to the caller.
    When `getopt' finds an option that takes an argument,
    the argument value is returned here.
    Also, when `ordering' is RETURN_IN_ORDER,
    each non-option ARGV-element is returned here.  */
 
 char *optarg;
 
 /* 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 -1, this is the index of the first of the
    non-option elements that the caller should itself scan.
 
    Otherwise, `optind' communicates from one call to the next
    how much of ARGV has been scanned so far.  */
 
 /* 1003.2 says this must be 1 before any call.  */
 int optind = 1;
 
 /* Formerly, initialization of getopt depended on optind==0, which
    causes problems with re-calling getopt as programs generally don't
    know that. */
 
 int __getopt_initialized;
 
 /* The next char to be scanned in the option-element
    in which the last 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 opterr = 1;
 
 /* Set to an option character which was unrecognized.
    This must be initialized on some systems to avoid linking in the
    system's own getopt implementation.  */
 
 int optopt = '?';
 
 /* Describe how to deal with options that follow non-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 option processing when the first non-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 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 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-option ARGV-element
    as if it were the argument of an option with character code 1.
    Using `-' as the first character of the list of option characters
    selects this mode of operation.
 
    The special argument `--' forces an end of option-scanning regardless
    of the value of `ordering'.  In the case of RETURN_IN_ORDER, only
    `--' can cause `getopt' to return -1 with `optind' != ARGC.  */
 
 static enum
 {
   REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
 } ordering;
 
 /* Value of POSIXLY_CORRECT environment variable.  */
 static char *posixly_correct;
 
 #ifdef  __GNU_LIBRARY__
 /* We want to avoid inclusion of string.h with non-GNU libraries
    because there are many ways it can cause trouble.
    On some systems, it contains special magic macros that don't work
    in GCC.  */
 # include <string.h>
 # define my_index   strchr
 #else
 
 # if HAVE_STRING_H
 #  include <string.h>
 # else
 #  include <strings.h>
 # endif
 
 /* Avoid depending on library functions or files
    whose names are inconsistent.  */
 
 #ifndef getenv
 extern char *getenv ();
 #endif
 
 static char *
 my_index (str, chr)
      const char *str;
      int chr;
 {
   while (*str)
     {
       if (*str == chr)
     return (char *) str;
       str++;
     }
   return 0;
 }
 
 /* If using GCC, we can safely declare strlen this way.
    If not using GCC, it is ok not to declare it.  */
 #ifdef __GNUC__
 /* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h.
    That was relevant to code that was here before.  */
 # if (!defined __STDC__ || !__STDC__) && !defined strlen
 /* gcc with -traditional declares the built-in strlen to return int,
    and has done so at least since version 2.4.5. -- rms.  */
 extern int strlen (const char *);
 # endif /* not __STDC__ */
 #endif /* __GNUC__ */
 
 #endif /* not __GNU_LIBRARY__ */
 
 /* 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;
 
 #ifdef _LIBC
 /* Bash 2.0 gives us an environment variable containing flags
    indicating ARGV elements that should not be considered arguments.  */
 
 /* Defined in getopt_init.c  */
 extern char *__getopt_nonoption_flags;
 
 static int nonoption_flags_max_len;
 static int nonoption_flags_len;
 
 static int original_argc;
 static char *const *original_argv;
 
 /* Make sure the environment variable bash 2.0 puts in the environment
    is valid for the getopt call we must make sure that the ARGV passed
    to getopt is that one passed to the process.  */
 static void
 __attribute__ ((unused))
 store_args_and_env (int argc, char *const *argv)
 {
   /* XXX This is no good solution.  We should rather copy the args so
      that we can compare them later.  But we must not use malloc(3).  */
   original_argc = argc;
   original_argv = argv;
 }
 # ifdef text_set_element
 text_set_element (__libc_subinit, store_args_and_env);
 # endif /* text_set_element */
 
 # define SWAP_FLAGS(ch1, ch2) \
   if (nonoption_flags_len > 0)                            \
     {                                         \
       char __tmp = __getopt_nonoption_flags[ch1];                 \
       __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2];          \
       __getopt_nonoption_flags[ch2] = __tmp;                      \
     }
 #else   /* !_LIBC */
 # define SWAP_FLAGS(ch1, ch2)
 #endif  /* _LIBC */
 
 /* 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,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.  */
 
 #if defined __STDC__ && __STDC__
 static void exchange (char **);
 #endif
 
 static void
 exchange (argv)
      char **argv;
 {
   int bottom = first_nonopt;
   int middle = last_nonopt;
   int top = optind;
   char *tem;
 
   /* Exchange the shorter segment with the far end of the longer segment.
      That puts the shorter segment into the right place.
      It leaves the longer segment in the right place overall,
      but it consists of two parts that need to be swapped next.  */
 
 #ifdef _LIBC
   /* First make sure the handling of the `__getopt_nonoption_flags'
      string can work normally.  Our top argument must be in the range
      of the string.  */
   if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len)
     {
       /* We must extend the array.  The user plays games with us and
      presents new arguments.  */
       char *new_str = malloc (top + 1);
       if (new_str == NULL)
     nonoption_flags_len = nonoption_flags_max_len = 0;
       else
     {
       memset (__mempcpy (new_str, __getopt_nonoption_flags,
                  nonoption_flags_max_len),
           '\0', top + 1 - nonoption_flags_max_len);
       nonoption_flags_max_len = top + 1;
       __getopt_nonoption_flags = new_str;
     }
     }
 #endif
 
   while (top > middle && middle > bottom)
     {
       if (top - middle > middle - bottom)
     {
       /* Bottom segment is the short one.  */
       int len = middle - bottom;
       register int i;
 
       /* Swap it with the top part of the top segment.  */
       for (i = 0; i < len; i++)
         {
           tem = argv[bottom + i];
           argv[bottom + i] = argv[top - (middle - bottom) + i];
           argv[top - (middle - bottom) + i] = tem;
           SWAP_FLAGS (bottom + i, top - (middle - bottom) + i);
         }
       /* Exclude the moved bottom segment from further swapping.  */
       top -= len;
     }
       else
     {
       /* Top segment is the short one.  */
       int len = top - middle;
       register int i;
 
       /* Swap it with the bottom part of the bottom segment.  */
       for (i = 0; i < len; i++)
         {
           tem = argv[bottom + i];
           argv[bottom + i] = argv[middle + i];
           argv[middle + i] = tem;
           SWAP_FLAGS (bottom + i, middle + i);
         }
       /* Exclude the moved top segment from further swapping.  */
       bottom += len;
     }
     }
 
   /* Update records for the slots the non-options now occupy.  */
 
   first_nonopt += (optind - last_nonopt);
   last_nonopt = optind;
 }
 
 /* Initialize the internal data when the first call is made.  */
 
 #if defined __STDC__ && __STDC__
 static const char *_getopt_initialize (int, char *const *, const char *);
 #endif
 static const char *
 _getopt_initialize (argc, argv, optstring)
      int argc;
      char *const *argv;
      const char *optstring;
 {
   /* Start processing options with ARGV-element 1 (since ARGV-element 0
      is the program name); the sequence of previously skipped
      non-option ARGV-elements is empty.  */
 
   first_nonopt = last_nonopt = optind;
 
   nextchar = NULL;
 
   posixly_correct = getenv ("POSIXLY_CORRECT");
 
   /* 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;
     }
   else if (posixly_correct != NULL)
     ordering = REQUIRE_ORDER;
   else
     ordering = PERMUTE;
 
 #ifdef _LIBC
   if (posixly_correct == NULL
       && argc == original_argc && argv == original_argv)
     {
       if (nonoption_flags_max_len == 0)
     {
       if (__getopt_nonoption_flags == NULL
           || __getopt_nonoption_flags[0] == '\0')
         nonoption_flags_max_len = -1;
       else
         {
           const char *orig_str = __getopt_nonoption_flags;
           int len = nonoption_flags_max_len = strlen (orig_str);
           if (nonoption_flags_max_len < argc)
         nonoption_flags_max_len = argc;
           __getopt_nonoption_flags =
         (char *) malloc (nonoption_flags_max_len);
           if (__getopt_nonoption_flags == NULL)
         nonoption_flags_max_len = -1;
           else
         memset (__mempcpy (__getopt_nonoption_flags, orig_str, len),
             '\0', nonoption_flags_max_len - len);
         }
     }
       nonoption_flags_len = nonoption_flags_max_len;
     }
   else
     nonoption_flags_len = 0;
 #endif
 
   return optstring;
 }
 
 /* Scan elements of ARGV (whose length is ARGC) for option characters
    given in OPTSTRING.
 
    If an element of ARGV starts with '-', and is not exactly "-" or "--",
    then it is an option element.  The characters of this element
    (aside from the initial '-') are option characters.  If `getopt'
    is called repeatedly, it returns successively each of the option characters
    from each of the option elements.
 
    If `getopt' finds another option character, it returns that character,
    updating `optind' and `nextchar' so that the next call to `getopt' can
    resume the scan with the following option character or ARGV-element.
 
    If there are no more option characters, `getopt' returns -1.
    Then `optind' is the index in ARGV of the first ARGV-element
    that is not an option.  (The ARGV-elements have been permuted
    so that those that are not options now come last.)
 
    OPTSTRING is a string containing the legitimate option characters.
    If an option character is seen that is not listed in OPTSTRING,
    return '?' after printing an error message.  If you set `opterr' to
    zero, the error message is suppressed but we still return '?'.
 
    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 `optarg'.  Two colons mean an option that
    wants an optional arg; if there is text in the current ARGV-element,
    it is returned in `optarg', otherwise `optarg' is set to zero.
 
    If OPTSTRING starts with `-' or `+', it requests different methods of
    handling the non-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 option.  If they have an
    argument, it follows the option name in the same ARGV-element, separated
    from the option name by a `=', or else the in next ARGV-element.
    When `getopt' finds a long-named option, it returns 0 if that option's
    `flag' field is nonzero, the value of the option's `val' field
    if the `flag' field is zero.
 
    The elements of ARGV aren't really const, because we permute them.
    But we pretend they're const in the prototype to be compatible
    with other systems.
 
    LONGOPTS is a vector of `struct option' terminated by an
    element containing a name which is zero.
 
    LONGIND returns the index in LONGOPT of the long-named option found.
    It is only valid when a long-named option has been found by the most
    recent call.
 
    If LONG_ONLY is nonzero, '-' as well as '--' can introduce
    long-named options.  */
 
 int
 _getopt_internal (argc, argv, optstring, longopts, longind, long_only)
      int argc;
      char *const *argv;
      const char *optstring;
      const struct option *longopts;
      int *longind;
      int long_only;
 {
   int print_errors = opterr;
   if (optstring[0] == ':')
     print_errors = 0;
 
   if (argc < 1)
     return -1;
 
   optarg = NULL;
 
   if (optind == 0 || !__getopt_initialized)
     {
       if (optind == 0)
     optind = 1; /* Don't scan ARGV[0], the program name.  */
       optstring = _getopt_initialize (argc, argv, optstring);
       __getopt_initialized = 1;
     }
 
   /* Test whether ARGV[optind] points to a non-option argument.
      Either it does not have option syntax, or there is an environment flag
      from the shell indicating it is not an option.  The later information
      is only used when the used in the GNU libc.  */
 #ifdef _LIBC
 # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0'       \
               || (optind < nonoption_flags_len                \
               && __getopt_nonoption_flags[optind] == '1'))
 #else
 # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0')
 #endif
 
   if (nextchar == NULL || *nextchar == '\0')
     {
       /* Advance to the next ARGV-element.  */
 
       /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been
      moved back by the user (who may also have changed the arguments).  */
       if (last_nonopt > optind)
     last_nonopt = optind;
       if (first_nonopt > optind)
     first_nonopt = optind;
 
       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 != optind)
         exchange ((char **) argv);
       else if (last_nonopt != optind)
         first_nonopt = optind;
 
       /* Skip any additional non-options
          and extend the range of non-options previously skipped.  */
 
       while (optind < argc && NONOPTION_P)
         optind++;
       last_nonopt = optind;
     }
 
       /* The special ARGV-element `--' means premature end of options.
      Skip it like a null option,
      then exchange with previous non-options as if it were an option,
      then skip everything else like a non-option.  */
 
       if (optind != argc && !strcmp (argv[optind], "--"))
     {
       optind++;
 
       if (first_nonopt != last_nonopt && last_nonopt != optind)
         exchange ((char **) argv);
       else if (first_nonopt == last_nonopt)
         first_nonopt = optind;
       last_nonopt = argc;
 
       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 (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)
         optind = first_nonopt;
       return -1;
     }
 
       /* If we have come to a non-option and did not permute it,
      either stop the scan or describe it to the caller and pass it by.  */
 
       if (NONOPTION_P)
     {
       if (ordering == REQUIRE_ORDER)
         return -1;
       optarg = argv[optind++];
       return 1;
     }
 
       /* We have found another option-ARGV-element.
      Skip the initial punctuation.  */
 
       nextchar = (argv[optind] + 1
           + (longopts != NULL && argv[optind][1] == '-'));
     }
 
   /* Decode the current option-ARGV-element.  */
 
   /* Check whether the ARGV-element is a long option.
 
      If long_only and the ARGV-element has the form "-f", where f is
      a valid short option, don't consider it an abbreviated form of
      a long option that starts with f.  Otherwise there would be no
      way to give the -f short option.
 
      On the other hand, if there's a long option "fubar" and
      the ARGV-element is "-fu", do consider that an abbreviation of
      the long option, just like "--fu", and not "-f" with arg "u".
 
      This distinction seems to be the most useful approach.  */
 
   if (longopts != NULL
       && (argv[optind][1] == '-'
       || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1])))))
     {
       char *nameend;
       const struct option *p;
       const struct option *pfound = NULL;
       int exact = 0;
       int ambig = 0;
       int indfound = -1;
       int option_index;
 
       for (nameend = nextchar; *nameend && *nameend != '='; nameend++)
     /* Do nothing.  */ ;
 
       /* Test all long options for either exact match
      or abbreviated matches.  */
       for (p = longopts, option_index = 0; p->name; p++, option_index++)
     if (!strncmp (p->name, nextchar, nameend - nextchar))
       {
         if ((unsigned int) (nameend - nextchar)
         == (unsigned int) strlen (p->name))
           {
         /* Exact match found.  */
         pfound = p;
         indfound = option_index;
         exact = 1;
         break;
           }
         else if (pfound == NULL)
           {
         /* First nonexact match found.  */
         pfound = p;
         indfound = option_index;
           }
         else if (long_only
              || pfound->has_arg != p->has_arg
              || pfound->flag != p->flag
              || pfound->val != p->val)
           /* Second or later nonexact match found.  */
           ambig = 1;
       }
 
       if (ambig && !exact)
     {
       if (print_errors)
         fprintf (stderr, _("%s: option `%s' is ambiguous\n"),
              argv[0], argv[optind]);
       nextchar += strlen (nextchar);
       optind++;
       optopt = 0;
       return '?';
     }
 
       if (pfound != NULL)
     {
       option_index = indfound;
       optind++;
       if (*nameend)
         {
           /* Don't test has_arg with >, because some C compilers don't
          allow it to be used on enums.  */
           if (pfound->has_arg)
         optarg = nameend + 1;
           else
         {
           if (print_errors)
             {
               if (argv[optind - 1][1] == '-')
             /* --option */
             fprintf (stderr,
                  _("%s: option `--%s' doesn't allow an argument\n"),
                  argv[0], pfound->name);
               else
             /* +option or -option */
             fprintf (stderr,
                  _("%s: option `%c%s' doesn't allow an argument\n"),
                  argv[0], argv[optind - 1][0], pfound->name);
             }
 
           nextchar += strlen (nextchar);
 
           optopt = pfound->val;
           return '?';
         }
         }
       else if (pfound->has_arg == 1)
         {
           if (optind < argc)
         optarg = argv[optind++];
           else
         {
           if (print_errors)
             fprintf (stderr,
                _("%s: option `%s' requires an argument\n"),
                argv[0], argv[optind - 1]);
           nextchar += strlen (nextchar);
           optopt = pfound->val;
           return optstring[0] == ':' ? ':' : '?';
         }
         }
       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 option.  If this is not getopt_long_only,
      or the option starts with '--' or is not a valid short
      option, then it's an error.
      Otherwise interpret it as a short option.  */
       if (!long_only || argv[optind][1] == '-'
       || my_index (optstring, *nextchar) == NULL)
     {
       if (print_errors)
         {
           if (argv[optind][1] == '-')
         /* --option */
         fprintf (stderr, _("%s: unrecognized option `--%s'\n"),
              argv[0], nextchar);
           else
         /* +option or -option */
         fprintf (stderr, _("%s: unrecognized option `%c%s'\n"),
              argv[0], argv[optind][0], nextchar);
         }
       nextchar = (char *) "";
       optind++;
       optopt = 0;
       return '?';
     }
     }
 
   /* Look at and handle the next short option-character.  */
 
   {
     char c = *nextchar++;
     char *temp = my_index (optstring, c);
 
     /* Increment `optind' when we start to process its last character.  */
     if (*nextchar == '\0')
       ++optind;
 
     if (temp == NULL || c == ':')
       {
     if (print_errors)
       {
         if (posixly_correct)
           /* 1003.2 specifies the format of this message.  */
           fprintf (stderr, _("%s: illegal option -- %c\n"),
                argv[0], c);
         else
           fprintf (stderr, _("%s: invalid option -- %c\n"),
                argv[0], c);
       }
     optopt = c;
     return '?';
       }
     /* Convenience. Treat POSIX -W foo same as long option --foo */
     if (temp[0] == 'W' && temp[1] == ';')
       {
     char *nameend;
     const struct option *p;
     const struct option *pfound = NULL;
     int exact = 0;
     int ambig = 0;
     int indfound = 0;
     int option_index;
 
     /* This is an option that requires an argument.  */
     if (*nextchar != '\0')
       {
         optarg = nextchar;
         /* If we end this ARGV-element by taking the rest as an arg,
            we must advance to the next element now.  */
         optind++;
       }
     else if (optind == argc)
       {
         if (print_errors)
           {
         /* 1003.2 specifies the format of this message.  */
         fprintf (stderr, _("%s: option requires an argument -- %c\n"),
              argv[0], c);
           }
         optopt = c;
         if (optstring[0] == ':')
           c = ':';
         else
           c = '?';
         return c;
       }
     else
       /* We already incremented `optind' once;
          increment it again when taking next ARGV-elt as argument.  */
       optarg = argv[optind++];
 
     /* optarg is now the argument, see if it's in the
        table of longopts.  */
 
     for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++)
       /* Do nothing.  */ ;
 
     /* Test all long options for either exact match
        or abbreviated matches.  */
     for (p = longopts, option_index = 0; p->name; p++, option_index++)
       if (!strncmp (p->name, nextchar, nameend - nextchar))
         {
           if ((unsigned int) (nameend - nextchar) == strlen (p->name))
         {
           /* Exact match found.  */
           pfound = p;
           indfound = option_index;
           exact = 1;
           break;
         }
           else if (pfound == NULL)
         {
           /* First nonexact match found.  */
           pfound = p;
           indfound = option_index;
         }
           else
         /* Second or later nonexact match found.  */
         ambig = 1;
         }
     if (ambig && !exact)
       {
         if (print_errors)
           fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"),
                argv[0], argv[optind]);
         nextchar += strlen (nextchar);
         optind++;
         return '?';
       }
     if (pfound != NULL)
       {
         option_index = indfound;
         if (*nameend)
           {
         /* Don't test has_arg with >, because some C compilers don't
            allow it to be used on enums.  */
         if (pfound->has_arg)
           optarg = nameend + 1;
         else
           {
             if (print_errors)
               fprintf (stderr, _("%s: option `-W %s' doesn't allow an argument\n"),
                    argv[0], pfound->name);
 
             nextchar += strlen (nextchar);
             return '?';
           }
           }
         else if (pfound->has_arg == 1)
           {
         if (optind < argc)
           optarg = argv[optind++];
         else
           {
             if (print_errors)
               fprintf (stderr,
                    _("%s: option `%s' requires an argument\n"),
                    argv[0], argv[optind - 1]);
             nextchar += strlen (nextchar);
             return optstring[0] == ':' ? ':' : '?';
           }
           }
         nextchar += strlen (nextchar);
         if (longind != NULL)
           *longind = option_index;
         if (pfound->flag)
           {
         *(pfound->flag) = pfound->val;
         return 0;
           }
         return pfound->val;
       }
       nextchar = NULL;
       return 'W';   /* Let the application handle it.   */
       }
     if (temp[1] == ':')
       {
     if (temp[2] == ':')
       {
         /* This is an option that accepts an argument optionally.  */
         if (*nextchar != '\0')
           {
         optarg = nextchar;
         optind++;
           }
         else
           optarg = NULL;
         nextchar = NULL;
       }
     else
       {
         /* This is an option that requires an argument.  */
         if (*nextchar != '\0')
           {
         optarg = nextchar;
         /* If we end this ARGV-element by taking the rest as an arg,
            we must advance to the next element now.  */
         optind++;
           }
         else if (optind == argc)
           {
         if (print_errors)
           {
             /* 1003.2 specifies the format of this message.  */
             fprintf (stderr,
                  _("%s: option requires an argument -- %c\n"),
                  argv[0], c);
           }
         optopt = c;
         if (optstring[0] == ':')
           c = ':';
         else
           c = '?';
           }
         else
           /* We already incremented `optind' once;
          increment it again when taking next ARGV-elt as argument.  */
           optarg = argv[optind++];
         nextchar = NULL;
       }
       }
     return c;
   }
 }
 
 int
 getopt (argc, argv, optstring)
      int argc;
      char *const *argv;
      const char *optstring;
 {
   return _getopt_internal (argc, argv, optstring,
                (const struct option *) 0,
                (int *) 0,
                0);
 }
 
 
 #ifdef TEST
 
 /* 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 = optind ? optind : 1;
 
       c = getopt (argc, argv, "abc:d:0123456789");
       if (c == -1)
     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 ("option %c\n", c);
       break;
 
     case 'a':
       printf ("option a\n");
       break;
 
     case 'b':
       printf ("option b\n");
       break;
 
     case 'c':
       printf ("option c with value `%s'\n", optarg);
       break;
 
     case '?':
       break;
 
     default:
       printf ("?? getopt returned character code 0%o ??\n", c);
     }
     }
 
   if (optind < argc)
     {
       printf ("non-option ARGV-elements: ");
       while (optind < argc)
     printf ("%s ", argv[optind++]);
       printf ("\n");
     }
 
   exit (0);
 }
 
 #endif /* TEST */