1 files changed, 1077 insertions, 0 deletions

diff --git a/src/util/getopt.c b/src/util/getopt.c
new file mode 100644
index 000000000..e069e76f7
--- /dev/null
+++ b/src/util/getopt.c
@@ -0,0 +1,1077 @@
+/* Getopt for GNU.
+   NOTE: getopt is now part of the C library, so if you don't know what
+   "Keep this file name-space clean" means, talk to roland@gnu.ai.mit.edu
+   before changing it!
+
+   Copyright (C) 1987, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97
+     Free Software Foundation, Inc.
+
+NOTE: The canonical source of this file is maintained with the GNU C Library.
+Bugs can be reported to bug-glibc@prep.ai.mit.edu.
+
+This program is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 2, or (at your option) any
+later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+USA.
+
+
+This code was heavily modified for GNUnet.
+Copyright (C) 2006 Christian Grothoff
+*/
+
+/**
+ * @file util/getopt.c
+ * @brief GNU style option parsing
+ *
+ * TODO: get rid of statics (make reentrant) and
+ * replace main GNU getopt parser with one that
+ * actually fits our API.
+ */
+
+#include "platform.h"
+#include "gnunet_common.h"
+#include "gnunet_getopt_lib.h"
+
+#ifdef VMS
+# include <unixlib.h>
+# if HAVE_STRING_H - 0
+#  include <string.h>
+# endif
+#endif
+
+#if defined (WIN32) && !defined (__CYGWIN32__)
+/* It's not Unix, really.  See?  Capital letters.  */
+# include <windows.h>
+# define getpid() GetCurrentProcessId()
+#endif
+
+#ifndef _
+/* This is for other GNU distributions with internationalized messages.
+   When compiling libc, the _ macro is predefined.  */
+# ifdef HAVE_LIBINTL_H
+#  include <libintl.h>
+#  define _(msgid)  gettext (msgid)
+# else
+#  define _(msgid)  (msgid)
+# endif
+#endif
+
+/* Describe the long-named options requested by the application.
+   The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector
+   of `struct GNoption' terminated by an element containing a name which is
+   zero.
+
+   The field `has_arg' is:
+   no_argument          (or 0) if the option does not take an argument,
+   required_argument  (or 1) if the option requires an argument,
+   optional_argument   (or 2) if the option takes an optional argument.
+
+   If the field `flag' is not NULL, it points to a variable that is set
+   to the value given in the field `val' when the option is found, but
+   left unchanged if the option is not found.
+
+   To have a long-named option do something other than set an `int' to
+   a compiled-in constant, such as set a value from `GNoptarg', set the
+   option's `flag' field to zero and its `val' field to a nonzero
+   value (the equivalent single-letter option character, if there is
+   one).  For long options that have a zero `flag' field, `getopt'
+   returns the contents of the `val' field.  */
+
+struct GNoption
+{
+  const char *name;
+  /* has_arg can't be an enum because some compilers complain about
+     type mismatches in all the code that assumes it is an int.  */
+  int has_arg;
+  int *flag;
+  int val;
+};
+
+
+/* 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.  */
+
+/* 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.  */
+
+static char *GNoptarg = NULL;
+
+/* Index in ARGV of the next element to be scanned.
+   This is used for communication to and from the caller
+   and for communication between successive calls to `getopt'.
+
+   On entry to `getopt', zero means this is the first call; initialize.
+
+   When `getopt' returns -1, this is the index of the first of the
+   non-option elements that the caller should itself scan.
+
+   Otherwise, `GNoptind' 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.  */
+static int GNoptind = 1;
+
+/* Formerly, initialization of getopt depended on GNoptind==0, which
+   causes problems with re-calling getopt as programs generally don't
+   know that. */
+
+static int __getopt_initialized = 0;
+
+/* 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.  */
+
+static int GNopterr = 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.  */
+
+static int GNoptopt = '?';
+
+/* 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 GNUNET_CRYPTO_random_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 GNoptions 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 `GNoptind' != 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
+
+/* Avoid depending on library functions or files
+   whose names are inconsistent.  */
+
+char *getenv ();
+
+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__
+/* 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;
+
+extern pid_t __libc_pid;
+
+/* 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;
+}
+
+text_set_element (__libc_subinit, store_args_and_env);
+
+# 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,GNoptind), 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 = GNoptind;
+  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
+        {
+          memcpy (new_str, __getopt_nonoption_flags, nonoption_flags_max_len);
+          memset (&new_str[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 += (GNoptind - last_nonopt);
+  last_nonopt = GNoptind;
+}
+
+/* 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 = GNoptind;
+
+  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
+                {
+                  memcpy (__getopt_nonoption_flags, orig_str, len);
+                  memset (&__getopt_nonoption_flags[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 `GNoptind' 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 `GNoptind' 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 `GNopterr' 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 `GNoptarg'.  Two colons mean an option that
+   wants an optional arg; if there is text in the current ARGV-element,
+   it is returned in `GNoptarg', otherwise `GNoptarg' 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 GNUNET_CRYPTO_random_permute them.
+   But we pretend they're const in the prototype to be compatible
+   with other systems.
+
+   LONGOPTS is a vector of `struct GNoption' 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.  */
+
+static int
+GN_getopt_internal (argc, argv, optstring, longopts, longind, long_only)
+     int argc;
+     char *const *argv;
+     const char *optstring;
+     const struct GNoption *longopts;
+     int *longind;
+     int long_only;
+{
+  GNoptarg = NULL;
+
+  if (GNoptind == 0 || !__getopt_initialized)
+    {
+      if (GNoptind == 0)
+        GNoptind = 1;           /* Don't scan ARGV[0], the program name.  */
+      optstring = _getopt_initialize (argc, argv, optstring);
+      __getopt_initialized = 1;
+    }
+
+  /* Test whether ARGV[GNoptind] 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[GNoptind][0] != '-' || argv[GNoptind][1] == '\0'        \
+             || (GNoptind < nonoption_flags_len                       \
+                 && __getopt_nonoption_flags[GNoptind] == '1'))
+#else
+#define NONOPTION_P (argv[GNoptind][0] != '-' || argv[GNoptind][1] == '\0')
+#endif
+
+  if (nextchar == NULL || *nextchar == '\0')
+    {
+      /* Advance to the next ARGV-element.  */
+
+      /* Give FIRST_NONOPT & LAST_NONOPT rational values if GNoptind has been
+         moved back by the user (who may also have changed the arguments).  */
+      if (last_nonopt > GNoptind)
+        last_nonopt = GNoptind;
+      if (first_nonopt > GNoptind)
+        first_nonopt = GNoptind;
+
+      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 != GNoptind)
+            exchange ((char **) argv);
+          else if (last_nonopt != GNoptind)
+            first_nonopt = GNoptind;
+
+          /* Skip any additional non-options
+             and extend the range of non-options previously skipped.  */
+
+          while (GNoptind < argc && NONOPTION_P)
+            GNoptind++;
+          last_nonopt = GNoptind;
+        }
+
+      /* 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 (GNoptind != argc && !strcmp (argv[GNoptind], "--"))
+        {
+          GNoptind++;
+
+          if (first_nonopt != last_nonopt && last_nonopt != GNoptind)
+            exchange ((char **) argv);
+          else if (first_nonopt == last_nonopt)
+            first_nonopt = GNoptind;
+          last_nonopt = argc;
+
+          GNoptind = argc;
+        }
+
+      /* If we have done all the ARGV-elements, stop the scan
+         and back over any non-options that we skipped and permuted.  */
+
+      if (GNoptind == 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)
+            GNoptind = 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;
+          GNoptarg = argv[GNoptind++];
+          return 1;
+        }
+
+      /* We have found another option-ARGV-element.
+         Skip the initial punctuation.  */
+
+      nextchar = (argv[GNoptind] + 1
+                  + (longopts != NULL && argv[GNoptind][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[GNoptind][1] == '-'
+          || (long_only
+              && (argv[GNoptind][2]
+                  || !my_index (optstring, argv[GNoptind][1])))))
+    {
+      char *nameend;
+      const struct GNoption *p;
+      const struct GNoption *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
+              /* Second or later nonexact match found.  */
+              ambig = 1;
+          }
+
+      if (ambig && !exact)
+        {
+          if (GNopterr)
+            fprintf (stderr, _("%s: option `%s' is ambiguous\n"),
+                     argv[0], argv[GNoptind]);
+          nextchar += strlen (nextchar);
+          GNoptind++;
+          GNoptopt = 0;
+          return '?';
+        }
+
+      if (pfound != NULL)
+        {
+          option_index = indfound;
+          GNoptind++;
+          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)
+                GNoptarg = nameend + 1;
+              else
+                {
+                  if (GNopterr)
+                    {
+                      if (argv[GNoptind - 1][1] == '-')
+                        /* --option */
+                        fprintf (stderr,
+                                 _
+                                 ("%s: option `--%s' does not allow an argument\n"),
+                                 argv[0], pfound->name);
+                      else
+                        /* +option or -option */
+                        fprintf (stderr,
+                                 _
+                                 ("%s: option `%c%s' does not allow an argument\n"),
+                                 argv[0], argv[GNoptind - 1][0],
+                                 pfound->name);
+                    }
+                  nextchar += strlen (nextchar);
+
+                  GNoptopt = pfound->val;
+                  return '?';
+                }
+            }
+          else if (pfound->has_arg == 1)
+            {
+              if (GNoptind < argc)
+                {
+                  GNoptarg = argv[GNoptind++];
+                }
+              else
+                {
+                  if (GNopterr)
+                    {
+                      fprintf (stderr,
+                               _("%s: option `%s' requires an argument\n"),
+                               argv[0], argv[GNoptind - 1]);
+                    }
+                  nextchar += strlen (nextchar);
+                  GNoptopt = 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[GNoptind][1] == '-'
+          || my_index (optstring, *nextchar) == NULL)
+        {
+          if (GNopterr)
+            {
+              if (argv[GNoptind][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[GNoptind][0], nextchar);
+            }
+          nextchar = (char *) "";
+          GNoptind++;
+          GNoptopt = 0;
+          return '?';
+        }
+    }
+
+  /* Look at and handle the next short option-character.  */
+
+  {
+    char c = *nextchar++;
+    char *temp = my_index (optstring, c);
+
+    /* Increment `GNoptind' when we start to process its last character.  */
+    if (*nextchar == '\0')
+      ++GNoptind;
+
+    if (temp == NULL || c == ':')
+      {
+        if (GNopterr)
+          {
+            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);
+          }
+        GNoptopt = c;
+        return '?';
+      }
+    /* Convenience. Treat POSIX -W foo same as long option --foo */
+    if (temp[0] == 'W' && temp[1] == ';')
+      {
+        char *nameend;
+        const struct GNoption *p;
+        const struct GNoption *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')
+          {
+            GNoptarg = nextchar;
+            /* If we end this ARGV-element by taking the rest as an arg,
+               we must advance to the next element now.  */
+            GNoptind++;
+          }
+        else if (GNoptind == argc)
+          {
+            if (GNopterr)
+              {
+                /* 1003.2 specifies the format of this message.  */
+                fprintf (stderr, _("%s: option requires an argument -- %c\n"),
+                         argv[0], c);
+              }
+            GNoptopt = c;
+            if (optstring[0] == ':')
+              c = ':';
+            else
+              c = '?';
+            return c;
+          }
+        else
+          /* We already incremented `GNoptind' once;
+             increment it again when taking next ARGV-elt as argument.  */
+          GNoptarg = argv[GNoptind++];
+
+        /* GNoptarg is now the argument, see if it's in the
+           table of longopts.  */
+
+        for (nextchar = nameend = GNoptarg; *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 (GNopterr)
+              fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"),
+                       argv[0], argv[GNoptind]);
+            nextchar += strlen (nextchar);
+            GNoptind++;
+            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)
+                  GNoptarg = nameend + 1;
+                else
+                  {
+                    if (GNopterr)
+                      fprintf (stderr, _("\
+%s: option `-W %s' does not allow an argument\n"), argv[0], pfound->name);
+
+                    nextchar += strlen (nextchar);
+                    return '?';
+                  }
+              }
+            else if (pfound->has_arg == 1)
+              {
+                if (GNoptind < argc)
+                  GNoptarg = argv[GNoptind++];
+                else
+                  {
+                    if (GNopterr)
+                      fprintf (stderr,
+                               _("%s: option `%s' requires an argument\n"),
+                               argv[0], argv[GNoptind - 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')
+              {
+                GNoptarg = nextchar;
+                GNoptind++;
+              }
+            else
+              GNoptarg = NULL;
+            nextchar = NULL;
+          }
+        else
+          {
+            /* This is an option that requires an argument.  */
+            if (*nextchar != '\0')
+              {
+                GNoptarg = nextchar;
+                /* If we end this ARGV-element by taking the rest as an arg,
+                   we must advance to the next element now.  */
+                GNoptind++;
+              }
+            else if (GNoptind == argc)
+              {
+                if (GNopterr)
+                  {
+                    /* 1003.2 specifies the format of this message.  */
+                    fprintf (stderr,
+                             _("%s: option requires an argument -- %c\n"),
+                             argv[0], c);
+                  }
+                GNoptopt = c;
+                if (optstring[0] == ':')
+                  c = ':';
+                else
+                  c = '?';
+              }
+            else
+              /* We already incremented `GNoptind' once;
+                 increment it again when taking next ARGV-elt as argument.  */
+              GNoptarg = argv[GNoptind++];
+            nextchar = NULL;
+          }
+      }
+    return c;
+  }
+}
+
+static int
+GNgetopt_long (int argc,
+               char *const *argv,
+               const char *options,
+               const struct GNoption *long_options, int *opt_index)
+{
+  return GN_getopt_internal (argc, argv, options, long_options, opt_index, 0);
+}
+
+/* ******************** now the GNUnet specific modifications... ********************* */
+
+/**
+ * Parse the command line.
+ *
+ * @param binaryName name of the binary / application with options
+ * @param cfg for storing/accessing configuration data
+ * @param allOptions defined options and handlers
+ * @param argc number of arguments
+ * @param argv actual arguments
+ * @return index into argv with first non-option
+ *   argument, or -1 on error
+ */
+int
+GNUNET_GETOPT_run (const char *binaryOptions,
+                   struct GNUNET_CONFIGURATION_Handle *cfg,
+                   const struct GNUNET_GETOPT_CommandLineOption *allOptions,
+                   unsigned int argc, char *const *argv)
+{
+  struct GNoption *long_options;
+  struct GNUNET_GETOPT_CommandLineProcessorContext clpc;
+  int count;
+  int i;
+  char *shorts;
+  int spos;
+  int cont;
+  int c;
+
+  GNUNET_assert (argc > 0);
+  GNoptind = 0;
+  clpc.binaryName = argv[0];
+  clpc.binaryOptions = binaryOptions;
+  clpc.allOptions = allOptions;
+  clpc.argv = argv;
+  clpc.argc = argc;
+  clpc.cfg = cfg;
+  count = 0;
+  while (allOptions[count].name != NULL)
+    count++;
+  long_options = GNUNET_malloc (sizeof (struct GNoption) * (count + 1));
+  shorts = GNUNET_malloc (count * 2 + 1);
+  spos = 0;
+  for (i = 0; i < count; i++)
+    {
+      long_options[i].name = allOptions[i].name;
+      long_options[i].has_arg = allOptions[i].require_argument;
+      long_options[i].flag = NULL;
+      long_options[i].val = allOptions[i].shortName;
+      shorts[spos++] = allOptions[i].shortName;
+      if (allOptions[i].require_argument != 0)
+        shorts[spos++] = ':';
+    }
+  long_options[count].name = NULL;
+  long_options[count].has_arg = 0;
+  long_options[count].flag = NULL;
+  long_options[count].val = '\0';
+  shorts[spos++] = '\0';
+  cont = GNUNET_OK;
+  /* main getopt loop */
+  while (cont == GNUNET_OK)
+    {
+      int option_index = 0;
+      c = GNgetopt_long (argc, argv, shorts, long_options, &option_index);
+
+      if (c == GNUNET_SYSERR)
+        break;                  /* No more flags to process */
+
+      for (i = 0; i < count; i++)
+        {
+          clpc.currentArgument = GNoptind - 1;
+          if ((char) c == allOptions[i].shortName)
+            {
+              cont = allOptions[i].processor (&clpc,
+                                              allOptions[i].scls,
+                                              allOptions[i].name, GNoptarg);
+              break;
+            }
+        }
+      if (i == count)
+        {
+          fprintf (stderr, _("Use --help to get a list of options.\n"));
+          cont = GNUNET_SYSERR;
+        }
+    }
+
+  GNUNET_free (shorts);
+  GNUNET_free (long_options);
+  if (cont == GNUNET_SYSERR)
+    return GNUNET_SYSERR;
+  return GNoptind;
+}
+
+/* end of getopt.c */