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