4556616 [rkeene@sledge /home/rkeene/devel/dact]$ cat -n getopt.c
   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 
   6    Copyright (C) 1987, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98
   7     Free Software Foundation, Inc.
   8 
   9    NOTE: The canonical source of this file is maintained with the GNU C Library.
  10    Bugs can be reported to bug-glibc@gnu.org.
  11 
  12    This program is free software; you can redistribute it and/or modify it
  13    under the terms of the GNU General Public License as published by the
  14    Free Software Foundation; either version 2, or (at your option) any
  15    later version.
  16 
  17    This program is distributed in the hope that it will be useful,
  18    but WITHOUT ANY WARRANTY; without even the implied warranty of
  19    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20    GNU General Public License for more details.
  21 
  22    You should have received a copy of the GNU General Public License
  23    along with this program; if not, write to the Free Software
  24    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  25    USA.  */
  26 
  27 /* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>.
  28    Ditto for AIX 3.2 and <stdlib.h>.  */
  29 #ifndef _NO_PROTO
  30 # define _NO_PROTO
  31 #endif
  32 
  33 #ifdef HAVE_CONFIG_H
  34 # include "config.h"
  35 #endif
  36 
  37 #if !defined __STDC__ || !__STDC__
  38 /* This is a separate conditional since some stdc systems
  39    reject `defined (const)'.  */
  40 # ifndef const
  41 #  define const
  42 # endif
  43 #endif
  44 
  45 #include <stdio.h>
  46 
  47 /* Comment out all this code if we are using the GNU C Library, and are not
  48    actually compiling the library itself.  This code is part of the GNU C
  49    Library, but also included in many other GNU distributions.  Compiling
  50    and linking in this code is a waste when using the GNU C library
  51    (especially if it is a shared library).  Rather than having every GNU
  52    program understand `configure --with-gnu-libc' and omit the object files,
  53    it is simpler to just do this in the source for each such file.  */
  54 
  55 #define GETOPT_INTERFACE_VERSION 2
  56 #if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2
  57 # include <gnu-versions.h>
  58 # if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION
  59 #  define ELIDE_CODE
  60 # endif
  61 #endif
  62 
  63 #ifndef ELIDE_CODE
  64 
  65 
  66 /* This needs to come after some library #include
  67    to get __GNU_LIBRARY__ defined.  */
  68 #ifdef  __GNU_LIBRARY__
  69 /* Don't include stdlib.h for non-GNU C libraries because some of them
  70    contain conflicting prototypes for getopt.  */
  71 # include <stdlib.h>
  72 # include <unistd.h>
  73 #endif  /* GNU C library.  */
  74 
  75 #ifdef VMS
  76 # include <unixlib.h>
  77 # if HAVE_STRING_H - 0
  78 #  include <string.h>
  79 # endif
  80 #endif
  81 
  82 #ifndef _
  83 /* This is for other GNU distributions with internationalized messages.
  84    When compiling libc, the _ macro is predefined.  */
  85 # ifdef HAVE_LIBINTL_H
  86 #  include <libintl.h>
  87 #  define _(msgid)  gettext (msgid)
  88 # else
  89 #  define _(msgid)  (msgid)
  90 # endif
  91 #endif
  92 
  93 /* This version of `getopt' appears to the caller like standard Unix `getopt'
  94    but it behaves differently for the user, since it allows the user
  95    to intersperse the options with the other arguments.
  96 
  97    As `getopt' works, it permutes the elements of ARGV so that,
  98    when it is done, all the options precede everything else.  Thus
  99    all application programs are extended to handle flexible argument order.
 100 
 101    Setting the environment variable POSIXLY_CORRECT disables permutation.
 102    Then the behavior is completely standard.
 103 
 104    GNU application programs can use a third alternative mode in which
 105    they can distinguish the relative order of options and other arguments.  */
 106 
 107 #include "getopt.h"
 108 
 109 /* For communication from `getopt' to the caller.
 110    When `getopt' finds an option that takes an argument,
 111    the argument value is returned here.
 112    Also, when `ordering' is RETURN_IN_ORDER,
 113    each non-option ARGV-element is returned here.  */
 114 
 115 char *optarg = NULL;
 116 
 117 /* Index in ARGV of the next element to be scanned.
 118    This is used for communication to and from the caller
 119    and for communication between successive calls to `getopt'.
 120 
 121    On entry to `getopt', zero means this is the first call; initialize.
 122 
 123    When `getopt' returns -1, this is the index of the first of the
 124    non-option elements that the caller should itself scan.
 125 
 126    Otherwise, `optind' communicates from one call to the next
 127    how much of ARGV has been scanned so far.  */
 128 
 129 /* 1003.2 says this must be 1 before any call.  */
 130 int optind = 1;
 131 
 132 /* Formerly, initialization of getopt depended on optind==0, which
 133    causes problems with re-calling getopt as programs generally don't
 134    know that. */
 135 
 136 int __getopt_initialized = 0;
 137 
 138 /* The next char to be scanned in the option-element
 139    in which the last option character we returned was found.
 140    This allows us to pick up the scan where we left off.
 141 
 142    If this is zero, or a null string, it means resume the scan
 143    by advancing to the next ARGV-element.  */
 144 
 145 static char *nextchar;
 146 
 147 /* Callers store zero here to inhibit the error message
 148    for unrecognized options.  */
 149 
 150 int opterr = 1;
 151 
 152 /* Set to an option character which was unrecognized.
 153    This must be initialized on some systems to avoid linking in the
 154    system's own getopt implementation.  */
 155 
 156 int optopt = '?';
 157 
 158 /* Describe how to deal with options that follow non-option ARGV-elements.
 159 
 160    If the caller did not specify anything,
 161    the default is REQUIRE_ORDER if the environment variable
 162    POSIXLY_CORRECT is defined, PERMUTE otherwise.
 163 
 164    REQUIRE_ORDER means don't recognize them as options;
 165    stop option processing when the first non-option is seen.
 166    This is what Unix does.
 167    This mode of operation is selected by either setting the environment
 168    variable POSIXLY_CORRECT, or using `+' as the first character
 169    of the list of option characters.
 170 
 171    PERMUTE is the default.  We permute the contents of ARGV as we scan,
 172    so that eventually all the non-options are at the end.  This allows options
 173    to be given in any order, even with programs that were not written to
 174    expect this.
 175 
 176    RETURN_IN_ORDER is an option available to programs that were written
 177    to expect options and other ARGV-elements in any order and that care about
 178    the ordering of the two.  We describe each non-option ARGV-element
 179    as if it were the argument of an option with character code 1.
 180    Using `-' as the first character of the list of option characters
 181    selects this mode of operation.
 182 
 183    The special argument `--' forces an end of option-scanning regardless
 184    of the value of `ordering'.  In the case of RETURN_IN_ORDER, only
 185    `--' can cause `getopt' to return -1 with `optind' != ARGC.  */
 186 
 187 static enum
 188 {
 189   REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER
 190 } ordering;
 191 
 192 /* Value of POSIXLY_CORRECT environment variable.  */
 193 static char *posixly_correct;
 194 
 195 #ifdef  __GNU_LIBRARY__
 196 /* We want to avoid inclusion of string.h with non-GNU libraries
 197    because there are many ways it can cause trouble.
 198    On some systems, it contains special magic macros that don't work
 199    in GCC.  */
 200 # include <string.h>
 201 # define my_index   strchr
 202 #else
 203 
 204 # if HAVE_STRING_H
 205 #  include <string.h>
 206 # else
 207 #  if HAVE_STRINGS_H
 208 #   include <strings.h>
 209 #  endif
 210 # endif
 211 
 212 /* Avoid depending on library functions or files
 213    whose names are inconsistent.  */
 214 
 215 #ifndef getenv
 216 #ifdef __cplusplus
 217 extern "C" {
 218 #endif
 219 extern char *getenv (const char *name);
 220 #ifdef __cplusplus
 221 }
 222 #endif
 223 #endif
 224 
 225 static char *
 226 my_index (const char *str, int chr)
 227 {
 228   while (*str)
 229     {
 230       if (*str == chr)
 231     return (char *) str;
 232       str++;
 233     }
 234   return 0;
 235 }
 236 
 237 /* If using GCC, we can safely declare strlen this way.
 238    If not using GCC, it is ok not to declare it.  */
 239 #ifdef __GNUC__
 240 /* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h.
 241    That was relevant to code that was here before.  */
 242 # if (!defined __STDC__ || !__STDC__) && !defined strlen
 243 /* gcc with -traditional declares the built-in strlen to return int,
 244    and has done so at least since version 2.4.5. -- rms.  */
 245 extern int strlen (const char *);
 246 # endif /* not __STDC__ */
 247 #endif /* __GNUC__ */
 248 
 249 #endif /* not __GNU_LIBRARY__ */
 250 
 251 /* Handle permutation of arguments.  */
 252 
 253 /* Describe the part of ARGV that contains non-options that have
 254    been skipped.  `first_nonopt' is the index in ARGV of the first of them;
 255    `last_nonopt' is the index after the last of them.  */
 256 
 257 static int first_nonopt;
 258 static int last_nonopt;
 259 
 260 #ifdef _LIBC
 261 /* Bash 2.0 gives us an environment variable containing flags
 262    indicating ARGV elements that should not be considered arguments.  */
 263 
 264 /* Defined in getopt_init.c  */
 265 extern char *__getopt_nonoption_flags;
 266 
 267 static int nonoption_flags_max_len;
 268 static int nonoption_flags_len;
 269 
 270 static int original_argc;
 271 static char *const *original_argv;
 272 
 273 /* Make sure the environment variable bash 2.0 puts in the environment
 274    is valid for the getopt call we must make sure that the ARGV passed
 275    to getopt is that one passed to the process.  */
 276 static void
 277 __attribute__ ((unused))
 278 store_args_and_env (int argc, char *const *argv)
 279 {
 280   /* XXX This is no good solution.  We should rather copy the args so
 281      that we can compare them later.  But we must not use malloc(3).  */
 282   original_argc = argc;
 283   original_argv = argv;
 284 }
 285 # ifdef text_set_element
 286 text_set_element (__libc_subinit, store_args_and_env);
 287 # endif /* text_set_element */
 288 
 289 # define SWAP_FLAGS(ch1, ch2) \
 290   if (nonoption_flags_len > 0)                            \
 291     {                                         \
 292       char __tmp = __getopt_nonoption_flags[ch1];                 \
 293       __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2];          \
 294       __getopt_nonoption_flags[ch2] = __tmp;                      \
 295     }
 296 #else   /* !_LIBC */
 297 # define SWAP_FLAGS(ch1, ch2)
 298 #endif  /* _LIBC */
 299 
 300 /* Exchange two adjacent subsequences of ARGV.
 301    One subsequence is elements [first_nonopt,last_nonopt)
 302    which contains all the non-options that have been skipped so far.
 303    The other is elements [last_nonopt,optind), which contains all
 304    the options processed since those non-options were skipped.
 305 
 306    `first_nonopt' and `last_nonopt' are relocated so that they describe
 307    the new indices of the non-options in ARGV after they are moved.  */
 308 
 309 #if defined __STDC__ && __STDC__
 310 static void exchange (char **);
 311 #endif
 312 
 313 static void
 314 exchange (char **argv)
 315 {
 316   int bottom = first_nonopt;
 317   int middle = last_nonopt;
 318   int top = optind;
 319   char *tem;
 320 
 321   /* Exchange the shorter segment with the far end of the longer segment.
 322      That puts the shorter segment into the right place.
 323      It leaves the longer segment in the right place overall,
 324      but it consists of two parts that need to be swapped next.  */
 325 
 326 #ifdef _LIBC
 327   /* First make sure the handling of the `__getopt_nonoption_flags'
 328      string can work normally.  Our top argument must be in the range
 329      of the string.  */
 330   if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len)
 331     {
 332       /* We must extend the array.  The user plays games with us and
 333      presents new arguments.  */
 334       char *new_str = malloc (top + 1);
 335       if (new_str == NULL)
 336     nonoption_flags_len = nonoption_flags_max_len = 0;
 337       else
 338     {
 339       memset (__mempcpy (new_str, __getopt_nonoption_flags,
 340                  nonoption_flags_max_len),
 341           '\0', top + 1 - nonoption_flags_max_len);
 342       nonoption_flags_max_len = top + 1;
 343       __getopt_nonoption_flags = new_str;
 344     }
 345     }
 346 #endif
 347 
 348   while (top > middle && middle > bottom)
 349     {
 350       if (top - middle > middle - bottom)
 351     {
 352       /* Bottom segment is the short one.  */
 353       int len = middle - bottom;
 354       register int i;
 355 
 356       /* Swap it with the top part of the top segment.  */
 357       for (i = 0; i < len; i++)
 358         {
 359           tem = argv[bottom + i];
 360           argv[bottom + i] = argv[top - (middle - bottom) + i];
 361           argv[top - (middle - bottom) + i] = tem;
 362           SWAP_FLAGS (bottom + i, top - (middle - bottom) + i);
 363         }
 364       /* Exclude the moved bottom segment from further swapping.  */
 365       top -= len;
 366     }
 367       else
 368     {
 369       /* Top segment is the short one.  */
 370       int len = top - middle;
 371       register int i;
 372 
 373       /* Swap it with the bottom part of the bottom segment.  */
 374       for (i = 0; i < len; i++)
 375         {
 376           tem = argv[bottom + i];
 377           argv[bottom + i] = argv[middle + i];
 378           argv[middle + i] = tem;
 379           SWAP_FLAGS (bottom + i, middle + i);
 380         }
 381       /* Exclude the moved top segment from further swapping.  */
 382       bottom += len;
 383     }
 384     }
 385 
 386   /* Update records for the slots the non-options now occupy.  */
 387 
 388   first_nonopt += (optind - last_nonopt);
 389   last_nonopt = optind;
 390 }
 391 
 392 /* Initialize the internal data when the first call is made.  */
 393 
 394 #if defined __STDC__ && __STDC__
 395 static const char *_getopt_initialize (int, char *const *, const char *);
 396 #endif
 397 
 398 static const char *
 399 _getopt_initialize (int argc, char *const *argv, const char *optstring)
 400 {
 401   /* Start processing options with ARGV-element 1 (since ARGV-element 0
 402      is the program name); the sequence of previously skipped
 403      non-option ARGV-elements is empty.  */
 404 
 405   first_nonopt = last_nonopt = optind;
 406 
 407   nextchar = NULL;
 408 
 409   posixly_correct = getenv ("POSIXLY_CORRECT");
 410 
 411   /* Determine how to handle the ordering of options and nonoptions.  */
 412 
 413   if (optstring[0] == '-')
 414     {
 415       ordering = RETURN_IN_ORDER;
 416       ++optstring;
 417     }
 418   else if (optstring[0] == '+')
 419     {
 420       ordering = REQUIRE_ORDER;
 421       ++optstring;
 422     }
 423   else if (posixly_correct != NULL)
 424     ordering = REQUIRE_ORDER;
 425   else
 426     ordering = PERMUTE;
 427 
 428 #ifdef _LIBC
 429   if (posixly_correct == NULL
 430       && argc == original_argc && argv == original_argv)
 431     {
 432       if (nonoption_flags_max_len == 0)
 433     {
 434       if (__getopt_nonoption_flags == NULL
 435           || __getopt_nonoption_flags[0] == '\0')
 436         nonoption_flags_max_len = -1;
 437       else
 438         {
 439           const char *orig_str = __getopt_nonoption_flags;
 440           int len = nonoption_flags_max_len = strlen (orig_str);
 441           if (nonoption_flags_max_len < argc)
 442         nonoption_flags_max_len = argc;
 443           __getopt_nonoption_flags =
 444         (char *) malloc (nonoption_flags_max_len);
 445           if (__getopt_nonoption_flags == NULL)
 446         nonoption_flags_max_len = -1;
 447           else
 448         memset (__mempcpy (__getopt_nonoption_flags, orig_str, len),
 449             '\0', nonoption_flags_max_len - len);
 450         }
 451     }
 452       nonoption_flags_len = nonoption_flags_max_len;
 453     }
 454   else
 455     nonoption_flags_len = 0;
 456 #endif
 457 
 458   return optstring;
 459 }
 460 
 461 /* Scan elements of ARGV (whose length is ARGC) for option characters
 462    given in OPTSTRING.
 463 
 464    If an element of ARGV starts with '-', and is not exactly "-" or "--",
 465    then it is an option element.  The characters of this element
 466    (aside from the initial '-') are option characters.  If `getopt'
 467    is called repeatedly, it returns successively each of the option characters
 468    from each of the option elements.
 469 
 470    If `getopt' finds another option character, it returns that character,
 471    updating `optind' and `nextchar' so that the next call to `getopt' can
 472    resume the scan with the following option character or ARGV-element.
 473 
 474    If there are no more option characters, `getopt' returns -1.
 475    Then `optind' is the index in ARGV of the first ARGV-element
 476    that is not an option.  (The ARGV-elements have been permuted
 477    so that those that are not options now come last.)
 478 
 479    OPTSTRING is a string containing the legitimate option characters.
 480    If an option character is seen that is not listed in OPTSTRING,
 481    return '?' after printing an error message.  If you set `opterr' to
 482    zero, the error message is suppressed but we still return '?'.
 483 
 484    If a char in OPTSTRING is followed by a colon, that means it wants an arg,
 485    so the following text in the same ARGV-element, or the text of the following
 486    ARGV-element, is returned in `optarg'.  Two colons mean an option that
 487    wants an optional arg; if there is text in the current ARGV-element,
 488    it is returned in `optarg', otherwise `optarg' is set to zero.
 489 
 490    If OPTSTRING starts with `-' or `+', it requests different methods of
 491    handling the non-option ARGV-elements.
 492    See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
 493 
 494    Long-named options begin with `--' instead of `-'.
 495    Their names may be abbreviated as long as the abbreviation is unique
 496    or is an exact match for some defined option.  If they have an
 497    argument, it follows the option name in the same ARGV-element, separated
 498    from the option name by a `=', or else the in next ARGV-element.
 499    When `getopt' finds a long-named option, it returns 0 if that option's
 500    `flag' field is nonzero, the value of the option's `val' field
 501    if the `flag' field is zero.
 502 
 503    The elements of ARGV aren't really const, because we permute them.
 504    But we pretend they're const in the prototype to be compatible
 505    with other systems.
 506 
 507    LONGOPTS is a vector of `struct option' terminated by an
 508    element containing a name which is zero.
 509 
 510    LONGIND returns the index in LONGOPT of the long-named option found.
 511    It is only valid when a long-named option has been found by the most
 512    recent call.
 513 
 514    If LONG_ONLY is nonzero, '-' as well as '--' can introduce
 515    long-named options.  */
 516 
 517 int
 518 _getopt_internal (int argc, char *const *argv, const char *optstring, const struct option *longopts, int *longind, int
	long_only)
 519 {
 520   optarg = NULL;
 521 
 522   if (optind == 0 || !__getopt_initialized)
 523     {
 524       if (optind == 0)
 525     optind = 1; /* Don't scan ARGV[0], the program name.  */
 526       optstring = _getopt_initialize (argc, argv, optstring);
 527       __getopt_initialized = 1;
 528     }
 529 
 530   /* Test whether ARGV[optind] points to a non-option argument.
 531      Either it does not have option syntax, or there is an environment flag
 532      from the shell indicating it is not an option.  The later information
 533      is only used when the used in the GNU libc.  */
 534 #ifdef _LIBC
 535 # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0'       \
 536               || (optind < nonoption_flags_len                \
 537               && __getopt_nonoption_flags[optind] == '1'))
 538 #else
 539 # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0')
 540 #endif
 541 
 542   if (nextchar == NULL || *nextchar == '\0')
 543     {
 544       /* Advance to the next ARGV-element.  */
 545 
 546       /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been
 547      moved back by the user (who may also have changed the arguments).  */
 548       if (last_nonopt > optind)
 549     last_nonopt = optind;
 550       if (first_nonopt > optind)
 551     first_nonopt = optind;
 552 
 553       if (ordering == PERMUTE)
 554     {
 555       /* If we have just processed some options following some non-options,
 556          exchange them so that the options come first.  */
 557 
 558       if (first_nonopt != last_nonopt && last_nonopt != optind)
 559         exchange ((char **) argv);
 560       else if (last_nonopt != optind)
 561         first_nonopt = optind;
 562 
 563       /* Skip any additional non-options
 564          and extend the range of non-options previously skipped.  */
 565 
 566       while (optind < argc && NONOPTION_P)
 567         optind++;
 568       last_nonopt = optind;
 569     }
 570 
 571       /* The special ARGV-element `--' means premature end of options.
 572      Skip it like a null option,
 573      then exchange with previous non-options as if it were an option,
 574      then skip everything else like a non-option.  */
 575 
 576       if (optind != argc && !strcmp (argv[optind], "--"))
 577     {
 578       optind++;
 579 
 580       if (first_nonopt != last_nonopt && last_nonopt != optind)
 581         exchange ((char **) argv);
 582       else if (first_nonopt == last_nonopt)
 583         first_nonopt = optind;
 584       last_nonopt = argc;
 585 
 586       optind = argc;
 587     }
 588 
 589       /* If we have done all the ARGV-elements, stop the scan
 590      and back over any non-options that we skipped and permuted.  */
 591 
 592       if (optind == argc)
 593     {
 594       /* Set the next-arg-index to point at the non-options
 595          that we previously skipped, so the caller will digest them.  */
 596       if (first_nonopt != last_nonopt)
 597         optind = first_nonopt;
 598       return -1;
 599     }
 600 
 601       /* If we have come to a non-option and did not permute it,
 602      either stop the scan or describe it to the caller and pass it by.  */
 603 
 604       if (NONOPTION_P)
 605     {
 606       if (ordering == REQUIRE_ORDER)
 607         return -1;
 608       optarg = argv[optind++];
 609       return 1;
 610     }
 611 
 612       /* We have found another option-ARGV-element.
 613      Skip the initial punctuation.  */
 614 
 615       nextchar = (argv[optind] + 1
 616           + (longopts != NULL && argv[optind][1] == '-'));
 617     }
 618 
 619   /* Decode the current option-ARGV-element.  */
 620 
 621   /* Check whether the ARGV-element is a long option.
 622 
 623      If long_only and the ARGV-element has the form "-f", where f is
 624      a valid short option, don't consider it an abbreviated form of
 625      a long option that starts with f.  Otherwise there would be no
 626      way to give the -f short option.
 627 
 628      On the other hand, if there's a long option "fubar" and
 629      the ARGV-element is "-fu", do consider that an abbreviation of
 630      the long option, just like "--fu", and not "-f" with arg "u".
 631 
 632      This distinction seems to be the most useful approach.  */
 633 
 634   if (longopts != NULL
 635       && (argv[optind][1] == '-'
 636       || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1])))))
 637     {
 638       char *nameend;
 639       const struct option *p;
 640       const struct option *pfound = NULL;
 641       int exact = 0;
 642       int ambig = 0;
 643       int indfound = -1;
 644       int option_index;
 645 
 646       for (nameend = nextchar; *nameend && *nameend != '='; nameend++)
 647     /* Do nothing.  */ ;
 648 
 649       /* Test all long options for either exact match
 650      or abbreviated matches.  */
 651       for (p = longopts, option_index = 0; p->name; p++, option_index++)
 652     if (!strncmp (p->name, nextchar, nameend - nextchar))
 653       {
 654         if ((unsigned int) (nameend - nextchar)
 655         == (unsigned int) strlen (p->name))
 656           {
 657         /* Exact match found.  */
 658         pfound = p;
 659         indfound = option_index;
 660         exact = 1;
 661         break;
 662           }
 663         else if (pfound == NULL)
 664           {
 665         /* First nonexact match found.  */
 666         pfound = p;
 667         indfound = option_index;
 668           }
 669         else
 670           /* Second or later nonexact match found.  */
 671           ambig = 1;
 672       }
 673 
 674       if (ambig && !exact)
 675     {
 676       if (opterr)
 677         fprintf (stderr, _("%s: option `%s' is ambiguous\n"),
 678              argv[0], argv[optind]);
 679       nextchar += strlen (nextchar);
 680       optind++;
 681       optopt = 0;
 682       return '?';
 683     }
 684 
 685       if (pfound != NULL)
 686     {
 687       option_index = indfound;
 688       optind++;
 689       if (*nameend)
 690         {
 691           /* Don't test has_arg with >, because some C compilers don't
 692          allow it to be used on enums.  */
 693           if (pfound->has_arg)
 694         optarg = nameend + 1;
 695           else
 696         {
 697           if (opterr)
 698             {
 699               if (argv[optind - 1][1] == '-')
 700             /* --option */
 701             fprintf (stderr,
 702                  _("%s: option `--%s' doesn't allow an argument\n"),
 703                  argv[0], pfound->name);
 704               else
 705             /* +option or -option */
 706             fprintf (stderr,
 707                  _("%s: option `%c%s' doesn't allow an argument\n"),
 708                  argv[0], argv[optind - 1][0], pfound->name);
 709 
 710               nextchar += strlen (nextchar);
 711 
 712               optopt = pfound->val;
 713               return '?';
 714             }
 715         }
 716         }
 717       else if (pfound->has_arg == 1)
 718         {
 719           if (optind < argc)
 720         optarg = argv[optind++];
 721           else
 722         {
 723           if (opterr)
 724             fprintf (stderr,
 725                _("%s: option `%s' requires an argument\n"),
 726                argv[0], argv[optind - 1]);
 727           nextchar += strlen (nextchar);
 728           optopt = pfound->val;
 729           return optstring[0] == ':' ? ':' : '?';
 730         }
 731         }
 732       nextchar += strlen (nextchar);
 733       if (longind != NULL)
 734         *longind = option_index;
 735       if (pfound->flag)
 736         {
 737           *(pfound->flag) = pfound->val;
 738           return 0;
 739         }
 740       return pfound->val;
 741     }
 742 
 743       /* Can't find it as a long option.  If this is not getopt_long_only,
 744      or the option starts with '--' or is not a valid short
 745      option, then it's an error.
 746      Otherwise interpret it as a short option.  */
 747       if (!long_only || argv[optind][1] == '-'
 748       || my_index (optstring, *nextchar) == NULL)
 749     {
 750       if (opterr)
 751         {
 752           if (argv[optind][1] == '-')
 753         /* --option */
 754         fprintf (stderr, _("%s: unrecognized option `--%s'\n"),
 755              argv[0], nextchar);
 756           else
 757         /* +option or -option */
 758         fprintf (stderr, _("%s: unrecognized option `%c%s'\n"),
 759              argv[0], argv[optind][0], nextchar);
 760         }
 761       nextchar = (char *) "";
 762       optind++;
 763       optopt = 0;
 764       return '?';
 765     }
 766     }
 767 
 768   /* Look at and handle the next short option-character.  */
 769 
 770   {
 771     char c = *nextchar++;
 772     char *temp = my_index (optstring, c);
 773 
 774     /* Increment `optind' when we start to process its last character.  */
 775     if (*nextchar == '\0')
 776       ++optind;
 777 
 778     if (temp == NULL || c == ':')
 779       {
 780     if (opterr)
 781       {
 782         if (posixly_correct)
 783           /* 1003.2 specifies the format of this message.  */
 784           fprintf (stderr, _("%s: illegal option -- %c\n"),
 785                argv[0], c);
 786         else
 787           fprintf (stderr, _("%s: invalid option -- %c\n"),
 788                argv[0], c);
 789       }
 790     optopt = c;
 791     return '?';
 792       }
 793     /* Convenience. Treat POSIX -W foo same as long option --foo */
 794     if (temp[0] == 'W' && temp[1] == ';')
 795       {
 796     char *nameend;
 797     const struct option *p;
 798     const struct option *pfound = NULL;
 799     int exact = 0;
 800     int ambig = 0;
 801     int indfound = 0;
 802     int option_index;
 803 
 804     /* This is an option that requires an argument.  */
 805     if (*nextchar != '\0')
 806       {
 807         optarg = nextchar;
 808         /* If we end this ARGV-element by taking the rest as an arg,
 809            we must advance to the next element now.  */
 810         optind++;
 811       }
 812     else if (optind == argc)
 813       {
 814         if (opterr)
 815           {
 816         /* 1003.2 specifies the format of this message.  */
 817         fprintf (stderr, _("%s: option requires an argument -- %c\n"),
 818              argv[0], c);
 819           }
 820         optopt = c;
 821         if (optstring[0] == ':')
 822           c = ':';
 823         else
 824           c = '?';
 825         return c;
 826       }
 827     else
 828       /* We already incremented `optind' once;
 829          increment it again when taking next ARGV-elt as argument.  */
 830       optarg = argv[optind++];
 831 
 832     /* optarg is now the argument, see if it's in the
 833        table of longopts.  */
 834 
 835     for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++)
 836       /* Do nothing.  */ ;
 837 
 838     /* Test all long options for either exact match
 839        or abbreviated matches.  */
 840     for (p = longopts, option_index = 0; p->name; p++, option_index++)
 841       if (!strncmp (p->name, nextchar, nameend - nextchar))
 842         {
 843           if ((unsigned int) (nameend - nextchar) == strlen (p->name))
 844         {
 845           /* Exact match found.  */
 846           pfound = p;
 847           indfound = option_index;
 848           exact = 1;
 849           break;
 850         }
 851           else if (pfound == NULL)
 852         {
 853           /* First nonexact match found.  */
 854           pfound = p;
 855           indfound = option_index;
 856         }
 857           else
 858         /* Second or later nonexact match found.  */
 859         ambig = 1;
 860         }
 861     if (ambig && !exact)
 862       {
 863         if (opterr)
 864           fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"),
 865                argv[0], argv[optind]);
 866         nextchar += strlen (nextchar);
 867         optind++;
 868         return '?';
 869       }
 870     if (pfound != NULL)
 871       {
 872         option_index = indfound;
 873         if (*nameend)
 874           {
 875         /* Don't test has_arg with >, because some C compilers don't
 876            allow it to be used on enums.  */
 877         if (pfound->has_arg)
 878           optarg = nameend + 1;
 879         else
 880           {
 881             if (opterr)
 882               fprintf (stderr, _("\
 883 %s: option `-W %s' doesn't allow an argument\n"),
 884                    argv[0], pfound->name);
 885 
 886             nextchar += strlen (nextchar);
 887             return '?';
 888           }
 889           }
 890         else if (pfound->has_arg == 1)
 891           {
 892         if (optind < argc)
 893           optarg = argv[optind++];
 894         else
 895           {
 896             if (opterr)
 897               fprintf (stderr,
 898                    _("%s: option `%s' requires an argument\n"),
 899                    argv[0], argv[optind - 1]);
 900             nextchar += strlen (nextchar);
 901             return optstring[0] == ':' ? ':' : '?';
 902           }
 903           }
 904         nextchar += strlen (nextchar);
 905         if (longind != NULL)
 906           *longind = option_index;
 907         if (pfound->flag)
 908           {
 909         *(pfound->flag) = pfound->val;
 910         return 0;
 911           }
 912         return pfound->val;
 913       }
 914       nextchar = NULL;
 915       return 'W';   /* Let the application handle it.   */
 916       }
 917     if (temp[1] == ':')
 918       {
 919     if (temp[2] == ':')
 920       {
 921         /* This is an option that accepts an argument optionally.  */
 922         if (*nextchar != '\0')
 923           {
 924         optarg = nextchar;
 925         optind++;
 926           }
 927         else
 928           optarg = NULL;
 929         nextchar = NULL;
 930       }
 931     else
 932       {
 933         /* This is an option that requires an argument.  */
 934         if (*nextchar != '\0')
 935           {
 936         optarg = nextchar;
 937         /* If we end this ARGV-element by taking the rest as an arg,
 938            we must advance to the next element now.  */
 939         optind++;
 940           }
 941         else if (optind == argc)
 942           {
 943         if (opterr)
 944           {
 945             /* 1003.2 specifies the format of this message.  */
 946             fprintf (stderr,
 947                _("%s: option requires an argument -- %c\n"),
 948                argv[0], c);
 949           }
 950         optopt = c;
 951         if (optstring[0] == ':')
 952           c = ':';
 953         else
 954           c = '?';
 955           }
 956         else
 957           /* We already incremented `optind' once;
 958          increment it again when taking next ARGV-elt as argument.  */
 959           optarg = argv[optind++];
 960         nextchar = NULL;
 961       }
 962       }
 963     return c;
 964   }
 965 }
 966 
 967 int
 968 getopt (int argc, char *const *argv, const char *optstring)
 969 {
 970   return _getopt_internal (argc, argv, optstring,
 971                (const struct option *) 0,
 972                (int *) 0,
 973                0);
 974 }
 975 
 976 #endif  /* Not ELIDE_CODE.  */
 977 
 978 #ifdef TEST
 979 
 980 /* Compile with -DTEST to make an executable for use in testing
 981    the above definition of `getopt'.  */
 982 
 983 int
 984 main (argc, argv)
 985      int argc;
 986      char **argv;
 987 {
 988   int c;
 989   int digit_optind = 0;
 990 
 991   while (1)
 992     {
 993       int this_option_optind = optind ? optind : 1;
 994 
 995       c = getopt (argc, argv, "abc:d:0123456789");
 996       if (c == -1)
 997     break;
 998 
 999       switch (c)
1000     {
1001     case '0':
1002     case '1':
1003     case '2':
1004     case '3':
1005     case '4':
1006     case '5':
1007     case '6':
1008     case '7':
1009     case '8':
1010     case '9':
1011       if (digit_optind != 0 && digit_optind != this_option_optind)
1012         printf ("digits occur in two different argv-elements.\n");
1013       digit_optind = this_option_optind;
1014       printf ("option %c\n", c);
1015       break;
1016 
1017     case 'a':
1018       printf ("option a\n");
1019       break;
1020 
1021     case 'b':
1022       printf ("option b\n");
1023       break;
1024 
1025     case 'c':
1026       printf ("option c with value `%s'\n", optarg);
1027       break;
1028 
1029     case '?':
1030       break;
1031 
1032     default:
1033       printf ("?? getopt returned character code 0%o ??\n", c);
1034     }
1035     }
1036 
1037   if (optind < argc)
1038     {
1039       printf ("non-option ARGV-elements: ");
1040       while (optind < argc)
1041     printf ("%s ", argv[optind++]);
1042       printf ("\n");
1043     }
1044 
1045   exit (0);
1046 }
1047 
1048 #endif /* TEST */
4556617 [rkeene@sledge /home/rkeene/devel/dact]$

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last modified: 2004-04-04 07:01:51