1 /* Getopt for GNU.
   2    NOTE: getopt is now part of the C library, so if you don't know what
   3    "Keep this file name-space clean" means, talk to drepper@gnu.org
   4    before changing it!
   5    Copyright (C) 1987,88,89,90,91,92,93,94,95,96,98,99,2000,2001,2002,2003,2004,2006
   6         Free Software Foundation, Inc.
   7    This file is part of the GNU C Library.
   8 
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2, or (at your option)
  12    any later version.
  13 
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18 
  19    You should have received a copy of the GNU General Public License along
  20    with this program; if not, write to the Free Software Foundation,
  21    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  22 
  23 #ifndef _LIBC
  24 # include <config.h>
  25 #endif
  26 
  27 #include "getopt.h"
  28 
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <unistd.h>
  33 
  34 #ifdef __VMS
  35 # include <unixlib.h>
  36 #endif
  37 
  38 #ifdef _LIBC
  39 # include <libintl.h>
  40 #else
  41 # include "gettext.h"
  42 # define _(msgid) gettext (msgid)
  43 #endif
  44 
  45 #if defined _LIBC && defined USE_IN_LIBIO
  46 # include <wchar.h>
  47 #endif
  48 
  49 #ifndef attribute_hidden
  50 # define attribute_hidden
  51 #endif
  52 
  53 /* Unlike standard Unix `getopt', functions like `getopt_long'
  54    let the user intersperse the options with the other arguments.
  55 
  56    As `getopt_long' works, it permutes the elements of ARGV so that,
  57    when it is done, all the options precede everything else.  Thus
  58    all application programs are extended to handle flexible argument order.
  59 
  60    Using `getopt' or setting the environment variable POSIXLY_CORRECT
  61    disables permutation.
  62    Then the application's behavior is completely standard.
  63 
  64    GNU application programs can use a third alternative mode in which
  65    they can distinguish the relative order of options and other arguments.  */
  66 
  67 #include "getopt_int.h"
  68 
  69 /* For communication from `getopt' to the caller.
  70    When `getopt' finds an option that takes an argument,
  71    the argument value is returned here.
  72    Also, when `ordering' is RETURN_IN_ORDER,
  73    each non-option ARGV-element is returned here.  */
  74 
  75 char *optarg;
  76 
  77 /* Index in ARGV of the next element to be scanned.
  78    This is used for communication to and from the caller
  79    and for communication between successive calls to `getopt'.
  80 
  81    On entry to `getopt', zero means this is the first call; initialize.
  82 
  83    When `getopt' returns -1, this is the index of the first of the
  84    non-option elements that the caller should itself scan.
  85 
  86    Otherwise, `optind' communicates from one call to the next
  87    how much of ARGV has been scanned so far.  */
  88 
  89 /* 1003.2 says this must be 1 before any call.  */
  90 int optind = 1;
  91 
  92 /* Callers store zero here to inhibit the error message
  93    for unrecognized options.  */
  94 
  95 int opterr = 1;
  96 
  97 /* Set to an option character which was unrecognized.
  98    This must be initialized on some systems to avoid linking in the
  99    system's own getopt implementation.  */
 100 
 101 int optopt = '?';
 102 
 103 /* Keep a global copy of all internal members of getopt_data.  */
 104 
 105 static struct _getopt_data getopt_data;
 106 
 107 
 108 #if defined HAVE_DECL_GETENV && !HAVE_DECL_GETENV
 109 extern char *getenv ();
 110 #endif
 111 
 112 #ifdef _LIBC
 113 /* Stored original parameters.
 114    XXX This is no good solution.  We should rather copy the args so
 115    that we can compare them later.  But we must not use malloc(3).  */
 116 extern int __libc_argc;
 117 extern char **__libc_argv;
 118 
 119 /* Bash 2.0 gives us an environment variable containing flags
 120    indicating ARGV elements that should not be considered arguments.  */
 121 
 122 # ifdef USE_NONOPTION_FLAGS
 123 /* Defined in getopt_init.c  */
 124 extern char *__getopt_nonoption_flags;
 125 # endif
 126 
 127 # ifdef USE_NONOPTION_FLAGS
 128 #  define SWAP_FLAGS(ch1, ch2) \
 129   if (d->__nonoption_flags_len > 0)                                             \
 130     {                                                                         \
 131       char __tmp = __getopt_nonoption_flags[ch1];                             \
 132       __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2];          \
 133       __getopt_nonoption_flags[ch2] = __tmp;                                  \
 134     }
 135 # else
 136 #  define SWAP_FLAGS(ch1, ch2)
 137 # endif
 138 #else   /* !_LIBC */
 139 # define SWAP_FLAGS(ch1, ch2)
 140 #endif  /* _LIBC */
 141 
 142 /* Exchange two adjacent subsequences of ARGV.
 143    One subsequence is elements [first_nonopt,last_nonopt)
 144    which contains all the non-options that have been skipped so far.
 145    The other is elements [last_nonopt,optind), which contains all
 146    the options processed since those non-options were skipped.
 147 
 148    `first_nonopt' and `last_nonopt' are relocated so that they describe
 149    the new indices of the non-options in ARGV after they are moved.  */
 150 
 151 static void
 152 exchange (char **argv, struct _getopt_data *d)
 153 {
 154   int bottom = d->__first_nonopt;
 155   int middle = d->__last_nonopt;
 156   int top = d->optind;
 157   char *tem;
 158 
 159   /* Exchange the shorter segment with the far end of the longer segment.
 160      That puts the shorter segment into the right place.
 161      It leaves the longer segment in the right place overall,
 162      but it consists of two parts that need to be swapped next.  */
 163 
 164 #if defined _LIBC && defined USE_NONOPTION_FLAGS
 165   /* First make sure the handling of the `__getopt_nonoption_flags'
 166      string can work normally.  Our top argument must be in the range
 167      of the string.  */
 168   if (d->__nonoption_flags_len > 0 && top >= d->__nonoption_flags_max_len)
 169     {
 170       /* We must extend the array.  The user plays games with us and
 171          presents new arguments.  */
 172       char *new_str = malloc (top + 1);
 173       if (new_str == NULL)
 174         d->__nonoption_flags_len = d->__nonoption_flags_max_len = 0;
 175       else
 176         {
 177           memset (__mempcpy (new_str, __getopt_nonoption_flags,
 178                              d->__nonoption_flags_max_len),
 179                   '\0', top + 1 - d->__nonoption_flags_max_len);
 180           d->__nonoption_flags_max_len = top + 1;
 181           __getopt_nonoption_flags = new_str;
 182         }
 183     }
 184 #endif
 185 
 186   while (top > middle && middle > bottom)
 187     {
 188       if (top - middle > middle - bottom)
 189         {
 190           /* Bottom segment is the short one.  */
 191           int len = middle - bottom;
 192           register int i;
 193 
 194           /* Swap it with the top part of the top segment.  */
 195           for (i = 0; i < len; i++)
 196             {
 197               tem = argv[bottom + i];
 198               argv[bottom + i] = argv[top - (middle - bottom) + i];
 199               argv[top - (middle - bottom) + i] = tem;
 200               SWAP_FLAGS (bottom + i, top - (middle - bottom) + i);
 201             }
 202           /* Exclude the moved bottom segment from further swapping.  */
 203           top -= len;
 204         }
 205       else
 206         {
 207           /* Top segment is the short one.  */
 208           int len = top - middle;
 209           register int i;
 210 
 211           /* Swap it with the bottom part of the bottom segment.  */
 212           for (i = 0; i < len; i++)
 213             {
 214               tem = argv[bottom + i];
 215               argv[bottom + i] = argv[middle + i];
 216               argv[middle + i] = tem;
 217               SWAP_FLAGS (bottom + i, middle + i);
 218             }
 219           /* Exclude the moved top segment from further swapping.  */
 220           bottom += len;
 221         }
 222     }
 223 
 224   /* Update records for the slots the non-options now occupy.  */
 225 
 226   d->__first_nonopt += (d->optind - d->__last_nonopt);
 227   d->__last_nonopt = d->optind;
 228 }
 229 
 230 /* Initialize the internal data when the first call is made.  */
 231 
 232 static const char *
 233 _getopt_initialize (int argc, char **argv, const char *optstring,
 234                     int posixly_correct, struct _getopt_data *d)
 235 {
 236   /* Start processing options with ARGV-element 1 (since ARGV-element 0
 237      is the program name); the sequence of previously skipped
 238      non-option ARGV-elements is empty.  */
 239 
 240   d->__first_nonopt = d->__last_nonopt = d->optind;
 241 
 242   d->__nextchar = NULL;
 243 
 244   d->__posixly_correct = posixly_correct || !!getenv ("POSIXLY_CORRECT");
 245 
 246   /* Determine how to handle the ordering of options and nonoptions.  */
 247 
 248   if (optstring[0] == '-')
 249     {
 250       d->__ordering = RETURN_IN_ORDER;
 251       ++optstring;
 252     }
 253   else if (optstring[0] == '+')
 254     {
 255       d->__ordering = REQUIRE_ORDER;
 256       ++optstring;
 257     }
 258   else if (d->__posixly_correct)
 259     d->__ordering = REQUIRE_ORDER;
 260   else
 261     d->__ordering = PERMUTE;
 262 
 263 #if defined _LIBC && defined USE_NONOPTION_FLAGS
 264   if (!d->__posixly_correct
 265       && argc == __libc_argc && argv == __libc_argv)
 266     {
 267       if (d->__nonoption_flags_max_len == 0)
 268         {
 269           if (__getopt_nonoption_flags == NULL
 270               || __getopt_nonoption_flags[0] == '\0')
 271             d->__nonoption_flags_max_len = -1;
 272           else
 273             {
 274               const char *orig_str = __getopt_nonoption_flags;
 275               int len = d->__nonoption_flags_max_len = strlen (orig_str);
 276               if (d->__nonoption_flags_max_len < argc)
 277                 d->__nonoption_flags_max_len = argc;
 278               __getopt_nonoption_flags =
 279                 (char *) malloc (d->__nonoption_flags_max_len);
 280               if (__getopt_nonoption_flags == NULL)
 281                 d->__nonoption_flags_max_len = -1;
 282               else
 283                 memset (__mempcpy (__getopt_nonoption_flags, orig_str, len),
 284                         '\0', d->__nonoption_flags_max_len - len);
 285             }
 286         }
 287       d->__nonoption_flags_len = d->__nonoption_flags_max_len;
 288     }
 289   else
 290     d->__nonoption_flags_len = 0;
 291 #endif
 292 
 293   return optstring;
 294 }
 295 
 296 /* Scan elements of ARGV (whose length is ARGC) for option characters
 297    given in OPTSTRING.
 298 
 299    If an element of ARGV starts with '-', and is not exactly "-" or "--",
 300    then it is an option element.  The characters of this element
 301    (aside from the initial '-') are option characters.  If `getopt'
 302    is called repeatedly, it returns successively each of the option characters
 303    from each of the option elements.
 304 
 305    If `getopt' finds another option character, it returns that character,
 306    updating `optind' and `nextchar' so that the next call to `getopt' can
 307    resume the scan with the following option character or ARGV-element.
 308 
 309    If there are no more option characters, `getopt' returns -1.
 310    Then `optind' is the index in ARGV of the first ARGV-element
 311    that is not an option.  (The ARGV-elements have been permuted
 312    so that those that are not options now come last.)
 313 
 314    OPTSTRING is a string containing the legitimate option characters.
 315    If an option character is seen that is not listed in OPTSTRING,
 316    return '?' after printing an error message.  If you set `opterr' to
 317    zero, the error message is suppressed but we still return '?'.
 318 
 319    If a char in OPTSTRING is followed by a colon, that means it wants an arg,
 320    so the following text in the same ARGV-element, or the text of the following
 321    ARGV-element, is returned in `optarg'.  Two colons mean an option that
 322    wants an optional arg; if there is text in the current ARGV-element,
 323    it is returned in `optarg', otherwise `optarg' is set to zero.
 324 
 325    If OPTSTRING starts with `-' or `+', it requests different methods of
 326    handling the non-option ARGV-elements.
 327    See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
 328 
 329    Long-named options begin with `--' instead of `-'.
 330    Their names may be abbreviated as long as the abbreviation is unique
 331    or is an exact match for some defined option.  If they have an
 332    argument, it follows the option name in the same ARGV-element, separated
 333    from the option name by a `=', or else the in next ARGV-element.
 334    When `getopt' finds a long-named option, it returns 0 if that option's
 335    `flag' field is nonzero, the value of the option's `val' field
 336    if the `flag' field is zero.
 337 
 338    LONGOPTS is a vector of `struct option' terminated by an
 339    element containing a name which is zero.
 340 
 341    LONGIND returns the index in LONGOPT of the long-named option found.
 342    It is only valid when a long-named option has been found by the most
 343    recent call.
 344 
 345    If LONG_ONLY is nonzero, '-' as well as '--' can introduce
 346    long-named options.
 347 
 348    If POSIXLY_CORRECT is nonzero, behave as if the POSIXLY_CORRECT
 349    environment variable were set.  */
 350 
 351 int
 352 _getopt_internal_r (int argc, char **argv, const char *optstring,
 353                     const struct option *longopts, int *longind,
 354                     int long_only, int posixly_correct, struct _getopt_data *d)
 355 {
 356   int print_errors = d->opterr;
 357   if (optstring[0] == ':')
 358     print_errors = 0;
 359 
 360   if (argc < 1)
 361     return -1;
 362 
 363   d->optarg = NULL;
 364 
 365   if (d->optind == 0 || !d->__initialized)
 366     {
 367       if (d->optind == 0)
 368         d->optind = 1;       /* Don't scan ARGV[0], the program name.  */
 369       optstring = _getopt_initialize (argc, argv, optstring,
 370                                       posixly_correct, d);
 371       d->__initialized = 1;
 372     }
 373 
 374   /* Test whether ARGV[optind] points to a non-option argument.
 375      Either it does not have option syntax, or there is an environment flag
 376      from the shell indicating it is not an option.  The later information
 377      is only used when the used in the GNU libc.  */
 378 #if defined _LIBC && defined USE_NONOPTION_FLAGS
 379 # define NONOPTION_P (argv[d->optind][0] != '-' || argv[d->optind][1] == '\0' \
 380                       || (d->optind < d->__nonoption_flags_len               \
 381                           && __getopt_nonoption_flags[d->optind] == '1'))
 382 #else
 383 # define NONOPTION_P (argv[d->optind][0] != '-' || argv[d->optind][1] == '\0')
 384 #endif
 385 
 386   if (d->__nextchar == NULL || *d->__nextchar == '\0')
 387     {
 388       /* Advance to the next ARGV-element.  */
 389 
 390       /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been
 391          moved back by the user (who may also have changed the arguments).  */
 392       if (d->__last_nonopt > d->optind)
 393         d->__last_nonopt = d->optind;
 394       if (d->__first_nonopt > d->optind)
 395         d->__first_nonopt = d->optind;
 396 
 397       if (d->__ordering == PERMUTE)
 398         {
 399           /* If we have just processed some options following some non-options,
 400              exchange them so that the options come first.  */
 401 
 402           if (d->__first_nonopt != d->__last_nonopt
 403               && d->__last_nonopt != d->optind)
 404             exchange ((char **) argv, d);
 405           else if (d->__last_nonopt != d->optind)
 406             d->__first_nonopt = d->optind;
 407 
 408           /* Skip any additional non-options
 409              and extend the range of non-options previously skipped.  */
 410 
 411           while (d->optind < argc && NONOPTION_P)
 412             d->optind++;
 413           d->__last_nonopt = d->optind;
 414         }
 415 
 416       /* The special ARGV-element `--' means premature end of options.
 417          Skip it like a null option,
 418          then exchange with previous non-options as if it were an option,
 419          then skip everything else like a non-option.  */
 420 
 421       if (d->optind != argc && !strcmp (argv[d->optind], "--"))
 422         {
 423           d->optind++;
 424 
 425           if (d->__first_nonopt != d->__last_nonopt
 426               && d->__last_nonopt != d->optind)
 427             exchange ((char **) argv, d);
 428           else if (d->__first_nonopt == d->__last_nonopt)
 429             d->__first_nonopt = d->optind;
 430           d->__last_nonopt = argc;
 431 
 432           d->optind = argc;
 433         }
 434 
 435       /* If we have done all the ARGV-elements, stop the scan
 436          and back over any non-options that we skipped and permuted.  */
 437 
 438       if (d->optind == argc)
 439         {
 440           /* Set the next-arg-index to point at the non-options
 441              that we previously skipped, so the caller will digest them.  */
 442           if (d->__first_nonopt != d->__last_nonopt)
 443             d->optind = d->__first_nonopt;
 444           return -1;
 445         }
 446 
 447       /* If we have come to a non-option and did not permute it,
 448          either stop the scan or describe it to the caller and pass it by.  */
 449 
 450       if (NONOPTION_P)
 451         {
 452           if (d->__ordering == REQUIRE_ORDER)
 453             return -1;
 454           d->optarg = argv[d->optind++];
 455           return 1;
 456         }
 457 
 458       /* We have found another option-ARGV-element.
 459          Skip the initial punctuation.  */
 460 
 461       d->__nextchar = (argv[d->optind] + 1
 462                   + (longopts != NULL && argv[d->optind][1] == '-'));
 463     }
 464 
 465   /* Decode the current option-ARGV-element.  */
 466 
 467   /* Check whether the ARGV-element is a long option.
 468 
 469      If long_only and the ARGV-element has the form "-f", where f is
 470      a valid short option, don't consider it an abbreviated form of
 471      a long option that starts with f.  Otherwise there would be no
 472      way to give the -f short option.
 473 
 474      On the other hand, if there's a long option "fubar" and
 475      the ARGV-element is "-fu", do consider that an abbreviation of
 476      the long option, just like "--fu", and not "-f" with arg "u".
 477 
 478      This distinction seems to be the most useful approach.  */
 479 
 480   if (longopts != NULL
 481       && (argv[d->optind][1] == '-'
 482           || (long_only && (argv[d->optind][2]
 483                             || !strchr (optstring, argv[d->optind][1])))))
 484     {
 485       char *nameend;
 486       const struct option *p;
 487       const struct option *pfound = NULL;
 488       int exact = 0;
 489       int ambig = 0;
 490       int indfound = -1;
 491       int option_index;
 492 
 493       for (nameend = d->__nextchar; *nameend && *nameend != '='; nameend++)
 494         /* Do nothing.  */ ;
 495 
 496       /* Test all long options for either exact match
 497          or abbreviated matches.  */
 498       for (p = longopts, option_index = 0; p->name; p++, option_index++)
 499         if (!strncmp (p->name, d->__nextchar, nameend - d->__nextchar))
 500           {
 501             if ((unsigned int) (nameend - d->__nextchar)
 502                 == (unsigned int) strlen (p->name))
 503               {
 504                 /* Exact match found.  */
 505                 pfound = p;
 506                 indfound = option_index;
 507                 exact = 1;
 508                 break;
 509               }
 510             else if (pfound == NULL)
 511               {
 512                 /* First nonexact match found.  */
 513                 pfound = p;
 514                 indfound = option_index;
 515               }
 516             else if (long_only
 517                      || pfound->has_arg != p->has_arg
 518                      || pfound->flag != p->flag
 519                      || pfound->val != p->val)
 520               /* Second or later nonexact match found.  */
 521               ambig = 1;
 522           }
 523 
 524       if (ambig && !exact)
 525         {
 526           if (print_errors)
 527             {
 528 #if defined _LIBC && defined USE_IN_LIBIO
 529               char *buf;
 530 
 531               if (__asprintf (&buf, _("%s: option `%s' is ambiguous\n"),
 532                               argv[0], argv[d->optind]) >= 0)
 533                 {
 534                   _IO_flockfile (stderr);
 535 
 536                   int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
 537                   ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
 538 
 539                   __fxprintf (NULL, "%s", buf);
 540 
 541                   ((_IO_FILE *) stderr)->_flags2 = old_flags2;
 542                   _IO_funlockfile (stderr);
 543 
 544                   free (buf);
 545                 }
 546 #else
 547               fprintf (stderr, _("%s: option `%s' is ambiguous\n"),
 548                        argv[0], argv[d->optind]);
 549 #endif
 550             }
 551           d->__nextchar += strlen (d->__nextchar);
 552           d->optind++;
 553           d->optopt = 0;
 554           return '?';
 555         }
 556 
 557       if (pfound != NULL)
 558         {
 559           option_index = indfound;
 560           d->optind++;
 561           if (*nameend)
 562             {
 563               /* Don't test has_arg with >, because some C compilers don't
 564                  allow it to be used on enums.  */
 565               if (pfound->has_arg)
 566                 d->optarg = nameend + 1;
 567               else
 568                 {
 569                   if (print_errors)
 570                     {
 571 #if defined _LIBC && defined USE_IN_LIBIO
 572                       char *buf;
 573                       int n;
 574 #endif
 575 
 576                       if (argv[d->optind - 1][1] == '-')
 577                         {
 578                           /* --option */
 579 #if defined _LIBC && defined USE_IN_LIBIO
 580                           n = __asprintf (&buf, _("\
 581 %s: option `--%s' doesn't allow an argument\n"),
 582                                           argv[0], pfound->name);
 583 #else
 584                           fprintf (stderr, _("\
 585 %s: option `--%s' doesn't allow an argument\n"),
 586                                    argv[0], pfound->name);
 587 #endif
 588                         }
 589                       else
 590                         {
 591                           /* +option or -option */
 592 #if defined _LIBC && defined USE_IN_LIBIO
 593                           n = __asprintf (&buf, _("\
 594 %s: option `%c%s' doesn't allow an argument\n"),
 595                                           argv[0], argv[d->optind - 1][0],
 596                                           pfound->name);
 597 #else
 598                           fprintf (stderr, _("\
 599 %s: option `%c%s' doesn't allow an argument\n"),
 600                                    argv[0], argv[d->optind - 1][0],
 601                                    pfound->name);
 602 #endif
 603                         }
 604 
 605 #if defined _LIBC && defined USE_IN_LIBIO
 606                       if (n >= 0)
 607                         {
 608                           _IO_flockfile (stderr);
 609 
 610                           int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
 611                           ((_IO_FILE *) stderr)->_flags2
 612                             |= _IO_FLAGS2_NOTCANCEL;
 613 
 614                           __fxprintf (NULL, "%s", buf);
 615 
 616                           ((_IO_FILE *) stderr)->_flags2 = old_flags2;
 617                           _IO_funlockfile (stderr);
 618 
 619                           free (buf);
 620                         }
 621 #endif
 622                     }
 623 
 624                   d->__nextchar += strlen (d->__nextchar);
 625 
 626                   d->optopt = pfound->val;
 627                   return '?';
 628                 }
 629             }
 630           else if (pfound->has_arg == 1)
 631             {
 632               if (d->optind < argc)
 633                 d->optarg = argv[d->optind++];
 634               else
 635                 {
 636                   if (print_errors)
 637                     {
 638 #if defined _LIBC && defined USE_IN_LIBIO
 639                       char *buf;
 640 
 641                       if (__asprintf (&buf, _("\
 642 %s: option `%s' requires an argument\n"),
 643                                       argv[0], argv[d->optind - 1]) >= 0)
 644                         {
 645                           _IO_flockfile (stderr);
 646 
 647                           int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
 648                           ((_IO_FILE *) stderr)->_flags2
 649                             |= _IO_FLAGS2_NOTCANCEL;
 650 
 651                           __fxprintf (NULL, "%s", buf);
 652 
 653                           ((_IO_FILE *) stderr)->_flags2 = old_flags2;
 654                           _IO_funlockfile (stderr);
 655 
 656                           free (buf);
 657                         }
 658 #else
 659                       fprintf (stderr,
 660                                _("%s: option `%s' requires an argument\n"),
 661                                argv[0], argv[d->optind - 1]);
 662 #endif
 663                     }
 664                   d->__nextchar += strlen (d->__nextchar);
 665                   d->optopt = pfound->val;
 666                   return optstring[0] == ':' ? ':' : '?';
 667                 }
 668             }
 669           d->__nextchar += strlen (d->__nextchar);
 670           if (longind != NULL)
 671             *longind = option_index;
 672           if (pfound->flag)
 673             {
 674               *(pfound->flag) = pfound->val;
 675               return 0;
 676             }
 677           return pfound->val;
 678         }
 679 
 680       /* Can't find it as a long option.  If this is not getopt_long_only,
 681          or the option starts with '--' or is not a valid short
 682          option, then it's an error.
 683          Otherwise interpret it as a short option.  */
 684       if (!long_only || argv[d->optind][1] == '-'
 685           || strchr (optstring, *d->__nextchar) == NULL)
 686         {
 687           if (print_errors)
 688             {
 689 #if defined _LIBC && defined USE_IN_LIBIO
 690               char *buf;
 691               int n;
 692 #endif
 693 
 694               if (argv[d->optind][1] == '-')
 695                 {
 696                   /* --option */
 697 #if defined _LIBC && defined USE_IN_LIBIO
 698                   n = __asprintf (&buf, _("%s: unrecognized option `--%s'\n"),
 699                                   argv[0], d->__nextchar);
 700 #else
 701                   fprintf (stderr, _("%s: unrecognized option `--%s'\n"),
 702                            argv[0], d->__nextchar);
 703 #endif
 704                 }
 705               else
 706                 {
 707                   /* +option or -option */
 708 #if defined _LIBC && defined USE_IN_LIBIO
 709                   n = __asprintf (&buf, _("%s: unrecognized option `%c%s'\n"),
 710                                   argv[0], argv[d->optind][0], d->__nextchar);
 711 #else
 712                   fprintf (stderr, _("%s: unrecognized option `%c%s'\n"),
 713                            argv[0], argv[d->optind][0], d->__nextchar);
 714 #endif
 715                 }
 716 
 717 #if defined _LIBC && defined USE_IN_LIBIO
 718               if (n >= 0)
 719                 {
 720                   _IO_flockfile (stderr);
 721 
 722                   int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
 723                   ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
 724 
 725                   __fxprintf (NULL, "%s", buf);
 726 
 727                   ((_IO_FILE *) stderr)->_flags2 = old_flags2;
 728                   _IO_funlockfile (stderr);
 729 
 730                   free (buf);
 731                 }
 732 #endif
 733             }
 734           d->__nextchar = (char *) "";
 735           d->optind++;
 736           d->optopt = 0;
 737           return '?';
 738         }
 739     }
 740 
 741   /* Look at and handle the next short option-character.  */
 742 
 743   {
 744     char c = *d->__nextchar++;
 745     char *temp = strchr (optstring, c);
 746 
 747     /* Increment `optind' when we start to process its last character.  */
 748     if (*d->__nextchar == '\0')
 749       ++d->optind;
 750 
 751     if (temp == NULL || c == ':')
 752       {
 753         if (print_errors)
 754           {
 755 #if defined _LIBC && defined USE_IN_LIBIO
 756               char *buf;
 757               int n;
 758 #endif
 759 
 760             if (d->__posixly_correct)
 761               {
 762                 /* 1003.2 specifies the format of this message.  */
 763 #if defined _LIBC && defined USE_IN_LIBIO
 764                 n = __asprintf (&buf, _("%s: illegal option -- %c\n"),
 765                                 argv[0], c);
 766 #else
 767                 fprintf (stderr, _("%s: illegal option -- %c\n"), argv[0], c);
 768 #endif
 769               }
 770             else
 771               {
 772 #if defined _LIBC && defined USE_IN_LIBIO
 773                 n = __asprintf (&buf, _("%s: invalid option -- %c\n"),
 774                                 argv[0], c);
 775 #else
 776                 fprintf (stderr, _("%s: invalid option -- %c\n"), argv[0], c);
 777 #endif
 778               }
 779 
 780 #if defined _LIBC && defined USE_IN_LIBIO
 781             if (n >= 0)
 782               {
 783                 _IO_flockfile (stderr);
 784 
 785                 int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
 786                 ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
 787 
 788                 __fxprintf (NULL, "%s", buf);
 789 
 790                 ((_IO_FILE *) stderr)->_flags2 = old_flags2;
 791                 _IO_funlockfile (stderr);
 792 
 793                 free (buf);
 794               }
 795 #endif
 796           }
 797         d->optopt = c;
 798         return '?';
 799       }
 800     /* Convenience. Treat POSIX -W foo same as long option --foo */
 801     if (temp[0] == 'W' && temp[1] == ';')
 802       {
 803         char *nameend;
 804         const struct option *p;
 805         const struct option *pfound = NULL;
 806         int exact = 0;
 807         int ambig = 0;
 808         int indfound = 0;
 809         int option_index;
 810 
 811         /* This is an option that requires an argument.  */
 812         if (*d->__nextchar != '\0')
 813           {
 814             d->optarg = d->__nextchar;
 815             /* If we end this ARGV-element by taking the rest as an arg,
 816                we must advance to the next element now.  */
 817             d->optind++;
 818           }
 819         else if (d->optind == argc)
 820           {
 821             if (print_errors)
 822               {
 823                 /* 1003.2 specifies the format of this message.  */
 824 #if defined _LIBC && defined USE_IN_LIBIO
 825                 char *buf;
 826 
 827                 if (__asprintf (&buf,
 828                                 _("%s: option requires an argument -- %c\n"),
 829                                 argv[0], c) >= 0)
 830                   {
 831                     _IO_flockfile (stderr);
 832 
 833                     int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
 834                     ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
 835 
 836                     __fxprintf (NULL, "%s", buf);
 837 
 838                     ((_IO_FILE *) stderr)->_flags2 = old_flags2;
 839                     _IO_funlockfile (stderr);
 840 
 841                     free (buf);
 842                   }
 843 #else
 844                 fprintf (stderr, _("%s: option requires an argument -- %c\n"),
 845                          argv[0], c);
 846 #endif
 847               }
 848             d->optopt = c;
 849             if (optstring[0] == ':')
 850               c = ':';
 851             else
 852               c = '?';
 853             return c;
 854           }
 855         else
 856           /* We already incremented `d->optind' once;
 857              increment it again when taking next ARGV-elt as argument.  */
 858           d->optarg = argv[d->optind++];
 859 
 860         /* optarg is now the argument, see if it's in the
 861            table of longopts.  */
 862 
 863         for (d->__nextchar = nameend = d->optarg; *nameend && *nameend != '=';
 864              nameend++)
 865           /* Do nothing.  */ ;
 866 
 867         /* Test all long options for either exact match
 868            or abbreviated matches.  */
 869         for (p = longopts, option_index = 0; p->name; p++, option_index++)
 870           if (!strncmp (p->name, d->__nextchar, nameend - d->__nextchar))
 871             {
 872               if ((unsigned int) (nameend - d->__nextchar) == strlen (p->name))
 873                 {
 874                   /* Exact match found.  */
 875                   pfound = p;
 876                   indfound = option_index;
 877                   exact = 1;
 878                   break;
 879                 }
 880               else if (pfound == NULL)
 881                 {
 882                   /* First nonexact match found.  */
 883                   pfound = p;
 884                   indfound = option_index;
 885                 }
 886               else
 887                 /* Second or later nonexact match found.  */
 888                 ambig = 1;
 889             }
 890         if (ambig && !exact)
 891           {
 892             if (print_errors)
 893               {
 894 #if defined _LIBC && defined USE_IN_LIBIO
 895                 char *buf;
 896 
 897                 if (__asprintf (&buf, _("%s: option `-W %s' is ambiguous\n"),
 898                                 argv[0], argv[d->optind]) >= 0)
 899                   {
 900                     _IO_flockfile (stderr);
 901 
 902                     int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
 903                     ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
 904 
 905                     __fxprintf (NULL, "%s", buf);
 906 
 907                     ((_IO_FILE *) stderr)->_flags2 = old_flags2;
 908                     _IO_funlockfile (stderr);
 909 
 910                     free (buf);
 911                   }
 912 #else
 913                 fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"),
 914                          argv[0], argv[d->optind]);
 915 #endif
 916               }
 917             d->__nextchar += strlen (d->__nextchar);
 918             d->optind++;
 919             return '?';
 920           }
 921         if (pfound != NULL)
 922           {
 923             option_index = indfound;
 924             if (*nameend)
 925               {
 926                 /* Don't test has_arg with >, because some C compilers don't
 927                    allow it to be used on enums.  */
 928                 if (pfound->has_arg)
 929                   d->optarg = nameend + 1;
 930                 else
 931                   {
 932                     if (print_errors)
 933                       {
 934 #if defined _LIBC && defined USE_IN_LIBIO
 935                         char *buf;
 936 
 937                         if (__asprintf (&buf, _("\
 938 %s: option `-W %s' doesn't allow an argument\n"),
 939                                         argv[0], pfound->name) >= 0)
 940                           {
 941                             _IO_flockfile (stderr);
 942 
 943                             int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
 944                             ((_IO_FILE *) stderr)->_flags2
 945                               |= _IO_FLAGS2_NOTCANCEL;
 946 
 947                             __fxprintf (NULL, "%s", buf);
 948 
 949                             ((_IO_FILE *) stderr)->_flags2 = old_flags2;
 950                             _IO_funlockfile (stderr);
 951 
 952                             free (buf);
 953                           }
 954 #else
 955                         fprintf (stderr, _("\
 956 %s: option `-W %s' doesn't allow an argument\n"),
 957                                  argv[0], pfound->name);
 958 #endif
 959                       }
 960 
 961                     d->__nextchar += strlen (d->__nextchar);
 962                     return '?';
 963                   }
 964               }
 965             else if (pfound->has_arg == 1)
 966               {
 967                 if (d->optind < argc)
 968                   d->optarg = argv[d->optind++];
 969                 else
 970                   {
 971                     if (print_errors)
 972                       {
 973 #if defined _LIBC && defined USE_IN_LIBIO
 974                         char *buf;
 975 
 976                         if (__asprintf (&buf, _("\
 977 %s: option `%s' requires an argument\n"),
 978                                         argv[0], argv[d->optind - 1]) >= 0)
 979                           {
 980                             _IO_flockfile (stderr);
 981 
 982                             int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
 983                             ((_IO_FILE *) stderr)->_flags2
 984                               |= _IO_FLAGS2_NOTCANCEL;
 985 
 986                             __fxprintf (NULL, "%s", buf);
 987 
 988                             ((_IO_FILE *) stderr)->_flags2 = old_flags2;
 989                             _IO_funlockfile (stderr);
 990 
 991                             free (buf);
 992                           }
 993 #else
 994                         fprintf (stderr,
 995                                  _("%s: option `%s' requires an argument\n"),
 996                                  argv[0], argv[d->optind - 1]);
 997 #endif
 998                       }
 999                     d->__nextchar += strlen (d->__nextchar);
1000                     return optstring[0] == ':' ? ':' : '?';
1001                   }
1002               }
1003             d->__nextchar += strlen (d->__nextchar);
1004             if (longind != NULL)
1005               *longind = option_index;
1006             if (pfound->flag)
1007               {
1008                 *(pfound->flag) = pfound->val;
1009                 return 0;
1010               }
1011             return pfound->val;
1012           }
1013           d->__nextchar = NULL;
1014           return 'W';   /* Let the application handle it.   */
1015       }
1016     if (temp[1] == ':')
1017       {
1018         if (temp[2] == ':')
1019           {
1020             /* This is an option that accepts an argument optionally.  */
1021             if (*d->__nextchar != '\0')
1022               {
1023                 d->optarg = d->__nextchar;
1024                 d->optind++;
1025               }
1026             else
1027               d->optarg = NULL;
1028             d->__nextchar = NULL;
1029           }
1030         else
1031           {
1032             /* This is an option that requires an argument.  */
1033             if (*d->__nextchar != '\0')
1034               {
1035                 d->optarg = d->__nextchar;
1036                 /* If we end this ARGV-element by taking the rest as an arg,
1037                    we must advance to the next element now.  */
1038                 d->optind++;
1039               }
1040             else if (d->optind == argc)
1041               {
1042                 if (print_errors)
1043                   {
1044                     /* 1003.2 specifies the format of this message.  */
1045 #if defined _LIBC && defined USE_IN_LIBIO
1046                     char *buf;
1047 
1048                     if (__asprintf (&buf, _("\
1049 %s: option requires an argument -- %c\n"),
1050                                     argv[0], c) >= 0)
1051                       {
1052                         _IO_flockfile (stderr);
1053 
1054                         int old_flags2 = ((_IO_FILE *) stderr)->_flags2;
1055                         ((_IO_FILE *) stderr)->_flags2 |= _IO_FLAGS2_NOTCANCEL;
1056 
1057                         __fxprintf (NULL, "%s", buf);
1058 
1059                         ((_IO_FILE *) stderr)->_flags2 = old_flags2;
1060                         _IO_funlockfile (stderr);
1061 
1062                         free (buf);
1063                       }
1064 #else
1065                     fprintf (stderr,
1066                              _("%s: option requires an argument -- %c\n"),
1067                              argv[0], c);
1068 #endif
1069                   }
1070                 d->optopt = c;
1071                 if (optstring[0] == ':')
1072                   c = ':';
1073                 else
1074                   c = '?';
1075               }
1076             else
1077               /* We already incremented `optind' once;
1078                  increment it again when taking next ARGV-elt as argument.  */
1079               d->optarg = argv[d->optind++];
1080             d->__nextchar = NULL;
1081           }
1082       }
1083     return c;
1084   }
1085 }
1086 
1087 int
1088 _getopt_internal (int argc, char **argv, const char *optstring,
1089                   const struct option *longopts, int *longind,
1090                   int long_only, int posixly_correct)
1091 {
1092   int result;
1093 
1094   getopt_data.optind = optind;
1095   getopt_data.opterr = opterr;
1096 
1097   result = _getopt_internal_r (argc, argv, optstring, longopts, longind,
1098                                long_only, posixly_correct, &getopt_data);
1099 
1100   optind = getopt_data.optind;
1101   optarg = getopt_data.optarg;
1102   optopt = getopt_data.optopt;
1103 
1104   return result;
1105 }
1106 
1107 /* glibc gets a LSB-compliant getopt.
1108    Standalone applications get a POSIX-compliant getopt.  */
1109 #if _LIBC
1110 enum { POSIXLY_CORRECT = 0 };
1111 #else
1112 enum { POSIXLY_CORRECT = 1 };
1113 #endif
1114 
1115 int
1116 getopt (int argc, char *const *argv, const char *optstring)
1117 {
1118   return _getopt_internal (argc, (char **) argv, optstring, NULL, NULL, 0,
1119                            POSIXLY_CORRECT);
1120 }
1121 
1122 
1123 #ifdef TEST
1124 
1125 /* Compile with -DTEST to make an executable for use in testing
1126    the above definition of `getopt'.  */
1127 
1128 int
1129 main (int argc, char **argv)
1130 {
1131   int c;
1132   int digit_optind = 0;
1133 
1134   while (1)
1135     {
1136       int this_option_optind = optind ? optind : 1;
1137 
1138       c = getopt (argc, argv, "abc:d:0123456789");
1139       if (c == -1)
1140         break;
1141 
1142       switch (c)
1143         {
1144         case '0':
1145         case '1':
1146         case '2':
1147         case '3':
1148         case '4':
1149         case '5':
1150         case '6':
1151         case '7':
1152         case '8':
1153         case '9':
1154           if (digit_optind != 0 && digit_optind != this_option_optind)
1155             printf ("digits occur in two different argv-elements.\n");
1156           digit_optind = this_option_optind;
1157           printf ("option %c\n", c);
1158           break;
1159 
1160         case 'a':
1161           printf ("option a\n");
1162           break;
1163 
1164         case 'b':
1165           printf ("option b\n");
1166           break;
1167 
1168         case 'c':
1169           printf ("option c with value `%s'\n", optarg);
1170           break;
1171 
1172         case '?':
1173           break;
1174 
1175         default:
1176           printf ("?? getopt returned character code 0%o ??\n", c);
1177         }
1178     }
1179 
1180   if (optind < argc)
1181     {
1182       printf ("non-option ARGV-elements: ");
1183       while (optind < argc)
1184         printf ("%s ", argv[optind++]);
1185       printf ("\n");
1186     }
1187 
1188   exit (0);
1189 }
1190 
1191 #endif /* TEST */