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tetex-bin  3.0
Defines | Functions | Variables
getopt.c File Reference
#include <stdio.h>
#include <string.h>
#include "gettext.h"
#include "getopt.h"
#include "getopt_int.h"

Go to the source code of this file.

Defines

#define _NO_PROTO
#define _(msgid)   gettext (msgid)
#define attribute_hidden
#define SWAP_FLAGS(ch1, ch2)
#define NONOPTION_P   (argv[d->optind][0] != '-' || argv[d->optind][1] == '\0')

Functions

char * getenv ()
static void exchange (char **argv, struct _getopt_data *d)
static const char * _getopt_initialize (int argc, char *const *argv, const char *optstring, struct _getopt_data *d)
int _getopt_internal_r (int argc, char *const *argv, const char *optstring, const struct option *longopts, int *longind, int long_only, struct _getopt_data *d)
int _getopt_internal (int argc, char *const *argv, const char *optstring, const struct option *longopts, int *longind, int long_only)
int getopt (int argc, char *const *argv, const char *optstring)

Variables

char * optarg
int optind = 1
int opterr = 1
int optopt = '?'
static struct _getopt_data

Define Documentation

#define _ (   msgid)    gettext (msgid)

Definition at line 54 of file getopt.c.

#define _NO_PROTO

Definition at line 26 of file getopt.c.

Definition at line 62 of file getopt.c.

#define NONOPTION_P   (argv[d->optind][0] != '-' || argv[d->optind][1] == '\0')
#define SWAP_FLAGS (   ch1,
  ch2 
)

Definition at line 159 of file getopt.c.


Function Documentation

static const char* _getopt_initialize ( int  argc,
char *const argv,
const char *  optstring,
struct _getopt_data d 
) [static]

Definition at line 253 of file getopt.c.

{
  /* 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.  */

  d->__first_nonopt = d->__last_nonopt = d->optind;

  d->__nextchar = NULL;

  d->__posixly_correct = !!getenv ("POSIXLY_CORRECT");

  /* Determine how to handle the ordering of options and nonoptions.  */

  if (optstring[0] == '-')
    {
      d->__ordering = RETURN_IN_ORDER;
      ++optstring;
    }
  else if (optstring[0] == '+')
    {
      d->__ordering = REQUIRE_ORDER;
      ++optstring;
    }
  else if (d->__posixly_correct)
    d->__ordering = REQUIRE_ORDER;
  else
    d->__ordering = PERMUTE;

#if defined _LIBC && defined USE_NONOPTION_FLAGS
  if (!d->__posixly_correct
      && argc == __libc_argc && argv == __libc_argv)
    {
      if (d->__nonoption_flags_max_len == 0)
       {
         if (__getopt_nonoption_flags == NULL
             || __getopt_nonoption_flags[0] == '\0')
           d->__nonoption_flags_max_len = -1;
         else
           {
             const char *orig_str = __getopt_nonoption_flags;
             int len = d->__nonoption_flags_max_len = strlen (orig_str);
             if (d->__nonoption_flags_max_len < argc)
              d->__nonoption_flags_max_len = argc;
             __getopt_nonoption_flags =
              (char *) malloc (d->__nonoption_flags_max_len);
             if (__getopt_nonoption_flags == NULL)
              d->__nonoption_flags_max_len = -1;
             else
              memset (__mempcpy (__getopt_nonoption_flags, orig_str, len),
                     '\0', d->__nonoption_flags_max_len - len);
           }
       }
      d->__nonoption_flags_len = d->__nonoption_flags_max_len;
    }
  else
    d->__nonoption_flags_len = 0;
#endif

  return optstring;
}

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int _getopt_internal ( int  argc,
char *const argv,
const char *  optstring,
const struct option longopts,
int longind,
int  long_only 
)

Definition at line 1138 of file getopt.c.

{
  int result;

  getopt_data.optind = optind;
  getopt_data.opterr = opterr;

  result = _getopt_internal_r (argc, argv, optstring, longopts,
                            longind, long_only, &getopt_data);

  optind = getopt_data.optind;
  optarg = getopt_data.optarg;
  optopt = getopt_data.optopt;

  return result;
}

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int _getopt_internal_r ( int  argc,
char *const argv,
const char *  optstring,
const struct option longopts,
int longind,
int  long_only,
struct _getopt_data d 
)

Definition at line 373 of file getopt.c.

{
  int print_errors = d->opterr;
  if (optstring[0] == ':')
    print_errors = 0;

  if (argc < 1)
    return -1;

  d->optarg = NULL;

  if (d->optind == 0 || !d->__initialized)
    {
      if (d->optind == 0)
       d->optind = 1;       /* Don't scan ARGV[0], the program name.  */
      optstring = _getopt_initialize (argc, argv, optstring, d);
      d->__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.  */
#if defined _LIBC && defined USE_NONOPTION_FLAGS
# define NONOPTION_P (argv[d->optind][0] != '-' || argv[d->optind][1] == '\0' \
                    || (d->optind < d->__nonoption_flags_len                \
                       && __getopt_nonoption_flags[d->optind] == '1'))
#else
# define NONOPTION_P (argv[d->optind][0] != '-' || argv[d->optind][1] == '\0')
#endif

  if (d->__nextchar == NULL || *d->__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 (d->__last_nonopt > d->optind)
       d->__last_nonopt = d->optind;
      if (d->__first_nonopt > d->optind)
       d->__first_nonopt = d->optind;

      if (d->__ordering == PERMUTE)
       {
         /* If we have just processed some options following some non-options,
            exchange them so that the options come first.  */

         if (d->__first_nonopt != d->__last_nonopt
             && d->__last_nonopt != d->optind)
           exchange ((char **) argv, d);
         else if (d->__last_nonopt != d->optind)
           d->__first_nonopt = d->optind;

         /* Skip any additional non-options
            and extend the range of non-options previously skipped.  */

         while (d->optind < argc && NONOPTION_P)
           d->optind++;
         d->__last_nonopt = d->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 (d->optind != argc && !strcmp (argv[d->optind], "--"))
       {
         d->optind++;

         if (d->__first_nonopt != d->__last_nonopt
             && d->__last_nonopt != d->optind)
           exchange ((char **) argv, d);
         else if (d->__first_nonopt == d->__last_nonopt)
           d->__first_nonopt = d->optind;
         d->__last_nonopt = argc;

         d->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 (d->optind == argc)
       {
         /* Set the next-arg-index to point at the non-options
            that we previously skipped, so the caller will digest them.  */
         if (d->__first_nonopt != d->__last_nonopt)
           d->optind = d->__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 (d->__ordering == REQUIRE_ORDER)
           return -1;
         d->optarg = argv[d->optind++];
         return 1;
       }

      /* We have found another option-ARGV-element.
        Skip the initial punctuation.  */

      d->__nextchar = (argv[d->optind] + 1
                + (longopts != NULL && argv[d->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[d->optind][1] == '-'
         || (long_only && (argv[d->optind][2]
                         || !strchr (optstring, argv[d->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 = d->__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, d->__nextchar, nameend - d->__nextchar))
         {
           if ((unsigned int) (nameend - d->__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)
           {
#if defined _LIBC && defined USE_IN_LIBIO
             char *buf;

             if (__asprintf (&buf, _("%s: option `%s' is ambiguous\n"),
                           argv[0], argv[d->optind]) >= 0)
              {
                _IO_flockfile (stderr);

                int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
                ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;

                if (_IO_fwide (stderr, 0) > 0)
                  __fwprintf (stderr, L"%s", buf);
                else
                  fputs (buf, stderr);

                ((_IO_FILE *) stderr)->_flags2 = old_flags2;
                _IO_funlockfile (stderr);

                free (buf);
              }
#else
             fprintf (stderr, _("%s: option `%s' is ambiguous\n"),
                     argv[0], argv[d->optind]);
#endif
           }
         d->__nextchar += strlen (d->__nextchar);
         d->optind++;
         d->optopt = 0;
         return '?';
       }

      if (pfound != NULL)
       {
         option_index = indfound;
         d->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)
              d->optarg = nameend + 1;
             else
              {
                if (print_errors)
                  {
#if defined _LIBC && defined USE_IN_LIBIO
                    char *buf;
                    int n;
#endif

                    if (argv[d->optind - 1][1] == '-')
                     {
                       /* --option */
#if defined _LIBC && defined USE_IN_LIBIO
                       n = __asprintf (&buf, _("\
%s: option `--%s' doesn't allow an argument\n"),
                                     argv[0], pfound->name);
#else
                       fprintf (stderr, _("\
%s: option `--%s' doesn't allow an argument\n"),
                               argv[0], pfound->name);
#endif
                     }
                    else
                     {
                       /* +option or -option */
#if defined _LIBC && defined USE_IN_LIBIO
                       n = __asprintf (&buf, _("\
%s: option `%c%s' doesn't allow an argument\n"),
                                     argv[0], argv[d->optind - 1][0],
                                     pfound->name);
#else
                       fprintf (stderr, _("\
%s: option `%c%s' doesn't allow an argument\n"),
                               argv[0], argv[d->optind - 1][0],
                               pfound->name);
#endif
                     }

#if defined _LIBC && defined USE_IN_LIBIO
                    if (n >= 0)
                     {
                       _IO_flockfile (stderr);

                       int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
                       ((_IO_FILE *) stderr)->_flags2
                         |= _IO_FLAGS2_NOTCANCEL;

                       if (_IO_fwide (stderr, 0) > 0)
                         __fwprintf (stderr, L"%s", buf);
                       else
                         fputs (buf, stderr);

                       ((_IO_FILE *) stderr)->_flags2 = old_flags2;
                       _IO_funlockfile (stderr);

                       free (buf);
                     }
#endif
                  }

                d->__nextchar += strlen (d->__nextchar);

                d->optopt = pfound->val;
                return '?';
              }
           }
         else if (pfound->has_arg == 1)
           {
             if (d->optind < argc)
              d->optarg = argv[d->optind++];
             else
              {
                if (print_errors)
                  {
#if defined _LIBC && defined USE_IN_LIBIO
                    char *buf;

                    if (__asprintf (&buf, _("\
%s: option `%s' requires an argument\n"),
                                  argv[0], argv[d->optind - 1]) >= 0)
                     {
                       _IO_flockfile (stderr);

                       int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
                       ((_IO_FILE *) stderr)->_flags2
                         |= _IO_FLAGS2_NOTCANCEL;

                       if (_IO_fwide (stderr, 0) > 0)
                         __fwprintf (stderr, L"%s", buf);
                       else
                         fputs (buf, stderr);

                       ((_IO_FILE *) stderr)->_flags2 = old_flags2;
                       _IO_funlockfile (stderr);

                       free (buf);
                     }
#else
                    fprintf (stderr,
                            _("%s: option `%s' requires an argument\n"),
                            argv[0], argv[d->optind - 1]);
#endif
                  }
                d->__nextchar += strlen (d->__nextchar);
                d->optopt = pfound->val;
                return optstring[0] == ':' ? ':' : '?';
              }
           }
         d->__nextchar += strlen (d->__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[d->optind][1] == '-'
         || strchr (optstring, *d->__nextchar) == NULL)
       {
         if (print_errors)
           {
#if defined _LIBC && defined USE_IN_LIBIO
             char *buf;
             int n;
#endif

             if (argv[d->optind][1] == '-')
              {
                /* --option */
#if defined _LIBC && defined USE_IN_LIBIO
                n = __asprintf (&buf, _("%s: unrecognized option `--%s'\n"),
                              argv[0], d->__nextchar);
#else
                fprintf (stderr, _("%s: unrecognized option `--%s'\n"),
                        argv[0], d->__nextchar);
#endif
              }
             else
              {
                /* +option or -option */
#if defined _LIBC && defined USE_IN_LIBIO
                n = __asprintf (&buf, _("%s: unrecognized option `%c%s'\n"),
                              argv[0], argv[d->optind][0], d->__nextchar);
#else
                fprintf (stderr, _("%s: unrecognized option `%c%s'\n"),
                        argv[0], argv[d->optind][0], d->__nextchar);
#endif
              }

#if defined _LIBC && defined USE_IN_LIBIO
             if (n >= 0)
              {
                _IO_flockfile (stderr);

                int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
                ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;

                if (_IO_fwide (stderr, 0) > 0)
                  __fwprintf (stderr, L"%s", buf);
                else
                  fputs (buf, stderr);

                ((_IO_FILE *) stderr)->_flags2 = old_flags2;
                _IO_funlockfile (stderr);

                free (buf);
              }
#endif
           }
         d->__nextchar = (char *) "";
         d->optind++;
         d->optopt = 0;
         return '?';
       }
    }

  /* Look at and handle the next short option-character.  */

  {
    char c = *d->__nextchar++;
    char *temp = strchr (optstring, c);

    /* Increment `optind' when we start to process its last character.  */
    if (*d->__nextchar == '\0')
      ++d->optind;

    if (temp == NULL || c == ':')
      {
       if (print_errors)
         {
#if defined _LIBC && defined USE_IN_LIBIO
             char *buf;
             int n;
#endif

           if (d->__posixly_correct)
             {
              /* 1003.2 specifies the format of this message.  */
#if defined _LIBC && defined USE_IN_LIBIO
              n = __asprintf (&buf, _("%s: illegal option -- %c\n"),
                            argv[0], c);
#else
              fprintf (stderr, _("%s: illegal option -- %c\n"), argv[0], c);
#endif
             }
           else
             {
#if defined _LIBC && defined USE_IN_LIBIO
              n = __asprintf (&buf, _("%s: invalid option -- %c\n"),
                            argv[0], c);
#else
              fprintf (stderr, _("%s: invalid option -- %c\n"), argv[0], c);
#endif
             }

#if defined _LIBC && defined USE_IN_LIBIO
           if (n >= 0)
             {
              _IO_flockfile (stderr);

              int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
              ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;

              if (_IO_fwide (stderr, 0) > 0)
                __fwprintf (stderr, L"%s", buf);
              else
                fputs (buf, stderr);

              ((_IO_FILE *) stderr)->_flags2 = old_flags2;
              _IO_funlockfile (stderr);

              free (buf);
             }
#endif
         }
       d->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 (*d->__nextchar != '\0')
         {
           d->optarg = d->__nextchar;
           /* If we end this ARGV-element by taking the rest as an arg,
              we must advance to the next element now.  */
           d->optind++;
         }
       else if (d->optind == argc)
         {
           if (print_errors)
             {
              /* 1003.2 specifies the format of this message.  */
#if defined _LIBC && defined USE_IN_LIBIO
              char *buf;

              if (__asprintf (&buf,
                            _("%s: option requires an argument -- %c\n"),
                            argv[0], c) >= 0)
                {
                  _IO_flockfile (stderr);

                  int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
                  ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;

                  if (_IO_fwide (stderr, 0) > 0)
                    __fwprintf (stderr, L"%s", buf);
                  else
                    fputs (buf, stderr);

                  ((_IO_FILE *) stderr)->_flags2 = old_flags2;
                  _IO_funlockfile (stderr);

                  free (buf);
                }
#else
              fprintf (stderr, _("%s: option requires an argument -- %c\n"),
                      argv[0], c);
#endif
             }
           d->optopt = c;
           if (optstring[0] == ':')
             c = ':';
           else
             c = '?';
           return c;
         }
       else
         /* We already incremented `d->optind' once;
            increment it again when taking next ARGV-elt as argument.  */
         d->optarg = argv[d->optind++];

       /* optarg is now the argument, see if it's in the
          table of longopts.  */

       for (d->__nextchar = nameend = d->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, d->__nextchar, nameend - d->__nextchar))
           {
             if ((unsigned int) (nameend - d->__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)
             {
#if defined _LIBC && defined USE_IN_LIBIO
              char *buf;

              if (__asprintf (&buf, _("%s: option `-W %s' is ambiguous\n"),
                            argv[0], argv[d->optind]) >= 0)
                {
                  _IO_flockfile (stderr);

                  int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
                  ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;

                  if (_IO_fwide (stderr, 0) > 0)
                    __fwprintf (stderr, L"%s", buf);
                  else
                    fputs (buf, stderr);

                  ((_IO_FILE *) stderr)->_flags2 = old_flags2;
                  _IO_funlockfile (stderr);

                  free (buf);
                }
#else
              fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"),
                      argv[0], argv[d->optind]);
#endif
             }
           d->__nextchar += strlen (d->__nextchar);
           d->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)
                d->optarg = nameend + 1;
              else
                {
                  if (print_errors)
                    {
#if defined _LIBC && defined USE_IN_LIBIO
                     char *buf;

                     if (__asprintf (&buf, _("\
%s: option `-W %s' doesn't allow an argument\n"),
                                   argv[0], pfound->name) >= 0)
                       {
                         _IO_flockfile (stderr);

                         int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
                         ((_IO_FILE *) stderr)->_flags2
                           |= _IO_FLAGS2_NOTCANCEL;

                         if (_IO_fwide (stderr, 0) > 0)
                           __fwprintf (stderr, L"%s", buf);
                         else
                           fputs (buf, stderr);

                         ((_IO_FILE *) stderr)->_flags2 = old_flags2;
                         _IO_funlockfile (stderr);

                         free (buf);
                       }
#else
                     fprintf (stderr, _("\
%s: option `-W %s' doesn't allow an argument\n"),
                             argv[0], pfound->name);
#endif
                    }

                  d->__nextchar += strlen (d->__nextchar);
                  return '?';
                }
             }
           else if (pfound->has_arg == 1)
             {
              if (d->optind < argc)
                d->optarg = argv[d->optind++];
              else
                {
                  if (print_errors)
                    {
#if defined _LIBC && defined USE_IN_LIBIO
                     char *buf;

                     if (__asprintf (&buf, _("\
%s: option `%s' requires an argument\n"),
                                   argv[0], argv[d->optind - 1]) >= 0)
                       {
                         _IO_flockfile (stderr);

                         int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
                         ((_IO_FILE *) stderr)->_flags2
                           |= _IO_FLAGS2_NOTCANCEL;

                         if (_IO_fwide (stderr, 0) > 0)
                           __fwprintf (stderr, L"%s", buf);
                         else
                           fputs (buf, stderr);

                         ((_IO_FILE *) stderr)->_flags2 = old_flags2;
                         _IO_funlockfile (stderr);

                         free (buf);
                       }
#else
                     fprintf (stderr,
                             _("%s: option `%s' requires an argument\n"),
                             argv[0], argv[d->optind - 1]);
#endif
                    }
                  d->__nextchar += strlen (d->__nextchar);
                  return optstring[0] == ':' ? ':' : '?';
                }
             }
           d->__nextchar += strlen (d->__nextchar);
           if (longind != NULL)
             *longind = option_index;
           if (pfound->flag)
             {
              *(pfound->flag) = pfound->val;
              return 0;
             }
           return pfound->val;
         }
         d->__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 (*d->__nextchar != '\0')
             {
              d->optarg = d->__nextchar;
              d->optind++;
             }
           else
             d->optarg = NULL;
           d->__nextchar = NULL;
         }
       else
         {
           /* This is an option that requires an argument.  */
           if (*d->__nextchar != '\0')
             {
              d->optarg = d->__nextchar;
              /* If we end this ARGV-element by taking the rest as an arg,
                 we must advance to the next element now.  */
              d->optind++;
             }
           else if (d->optind == argc)
             {
              if (print_errors)
                {
                  /* 1003.2 specifies the format of this message.  */
#if defined _LIBC && defined USE_IN_LIBIO
                  char *buf;

                  if (__asprintf (&buf, _("\
%s: option requires an argument -- %c\n"),
                                argv[0], c) >= 0)
                    {
                     _IO_flockfile (stderr);

                     int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
                     ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;

                     if (_IO_fwide (stderr, 0) > 0)
                       __fwprintf (stderr, L"%s", buf);
                     else
                       fputs (buf, stderr);

                     ((_IO_FILE *) stderr)->_flags2 = old_flags2;
                     _IO_funlockfile (stderr);

                     free (buf);
                    }
#else
                  fprintf (stderr,
                          _("%s: option requires an argument -- %c\n"),
                          argv[0], c);
#endif
                }
              d->optopt = c;
              if (optstring[0] == ':')
                c = ':';
              else
                c = '?';
             }
           else
             /* We already incremented `optind' once;
               increment it again when taking next ARGV-elt as argument.  */
             d->optarg = argv[d->optind++];
           d->__nextchar = NULL;
         }
      }
    return c;
  }
}

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static void exchange ( char **  argv,
struct _getopt_data d 
) [static]

Definition at line 172 of file getopt.c.

{
  int bottom = d->__first_nonopt;
  int middle = d->__last_nonopt;
  int top = d->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.  */

#if defined _LIBC && defined USE_NONOPTION_FLAGS
  /* 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 (d->__nonoption_flags_len > 0 && top >= d->__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)
       d->__nonoption_flags_len = d->__nonoption_flags_max_len = 0;
      else
       {
         memset (__mempcpy (new_str, __getopt_nonoption_flags,
                          d->__nonoption_flags_max_len),
                '\0', top + 1 - d->__nonoption_flags_max_len);
         d->__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.  */

  d->__first_nonopt += (d->optind - d->__last_nonopt);
  d->__last_nonopt = d->optind;
}

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char* getenv ( )
int getopt ( int  argc,
char *const argv,
const char *  optstring 
)

Definition at line 1157 of file getopt.c.

{
  return _getopt_internal (argc, argv, optstring,
                        (const struct option *) 0,
                        (int *) 0,
                        0);
}

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Variable Documentation

struct _getopt_data [static]

Definition at line 118 of file getopt.c.

char* optarg

Definition at line 88 of file getopt.c.

int opterr = 1

Definition at line 108 of file getopt.c.

int optind = 1

Definition at line 103 of file getopt.c.

int optopt = '?'

Definition at line 114 of file getopt.c.