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 (at) 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 (at) 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>. 29 Ditto for AIX 3.2 and <stdlib.h>. */ 30 #ifndef _NO_PROTO 31 # define _NO_PROTO 32 #endif 33 34 #ifdef HAVE_CONFIG_H 35 # include <config.h> 36 #endif 37 38 #if !defined __STDC__ || !__STDC__ 39 /* This is a separate conditional since some stdc systems 40 reject `defined (const)'. */ 41 # ifndef const 42 # define const 43 # endif 44 #endif 45 46 #include <stdio.h> 47 48 /* Comment out all this code if we are using the GNU C Library, and are not 49 actually compiling the library itself. This code is part of the GNU C 50 Library, but also included in many other GNU distributions. Compiling 51 and linking in this code is a waste when using the GNU C library 52 (especially if it is a shared library). Rather than having every GNU 53 program understand `configure --with-gnu-libc' and omit the object files, 54 it is simpler to just do this in the source for each such file. */ 55 56 #define GETOPT_INTERFACE_VERSION 2 57 #if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2 58 # include <gnu-versions.h> 59 # if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION 60 # define ELIDE_CODE 61 # endif 62 #endif 63 64 #ifndef ELIDE_CODE 65 66 67 /* This needs to come after some library #include 68 to get __GNU_LIBRARY__ defined. */ 69 #ifdef __GNU_LIBRARY__ 70 /* Don't include stdlib.h for non-GNU C libraries because some of them 71 contain conflicting prototypes for getopt. */ 72 # include <stdlib.h> 73 # include <unistd.h> 74 #endif /* GNU C library. */ 75 76 #ifdef VMS 77 # include <unixlib.h> 78 # if HAVE_STRING_H - 0 79 # include <string.h> 80 # endif 81 #endif 82 83 #ifndef _ 84 /* This is for other GNU distributions with internationalized messages. 85 When compiling libc, the _ macro is predefined. */ 86 # ifdef HAVE_LIBINTL_H 87 # include <libintl.h> 88 # define _(msgid) gettext (msgid) 89 # else 90 # define _(msgid) (msgid) 91 # endif 92 #endif 93 94 /* This version of `getopt' appears to the caller like standard Unix `getopt' 95 but it behaves differently for the user, since it allows the user 96 to intersperse the options with the other arguments. 97 98 As `getopt' works, it permutes the elements of ARGV so that, 99 when it is done, all the options precede everything else. Thus 100 all application programs are extended to handle flexible argument order. 101 102 Setting the environment variable POSIXLY_CORRECT disables permutation. 103 Then the behavior is completely standard. 104 105 GNU application programs can use a third alternative mode in which 106 they can distinguish the relative order of options and other arguments. */ 107 108 #include "getopt.h" 109 110 /* For communication from `getopt' to the caller. 111 When `getopt' finds an option that takes an argument, 112 the argument value is returned here. 113 Also, when `ordering' is RETURN_IN_ORDER, 114 each non-option ARGV-element is returned here. */ 115 116 char *optarg = NULL; 117 118 /* Index in ARGV of the next element to be scanned. 119 This is used for communication to and from the caller 120 and for communication between successive calls to `getopt'. 121 122 On entry to `getopt', zero means this is the first call; initialize. 123 124 When `getopt' returns -1, this is the index of the first of the 125 non-option elements that the caller should itself scan. 126 127 Otherwise, `optind' communicates from one call to the next 128 how much of ARGV has been scanned so far. */ 129 130 /* 1003.2 says this must be 1 before any call. */ 131 int optind = 1; 132 133 /* Formerly, initialization of getopt depended on optind==0, which 134 causes problems with re-calling getopt as programs generally don't 135 know that. */ 136 137 int __getopt_initialized = 0; 138 139 /* The next char to be scanned in the option-element 140 in which the last option character we returned was found. 141 This allows us to pick up the scan where we left off. 142 143 If this is zero, or a null string, it means resume the scan 144 by advancing to the next ARGV-element. */ 145 146 static char *nextchar; 147 148 /* Callers store zero here to inhibit the error message 149 for unrecognized options. */ 150 151 int opterr = 1; 152 153 /* Set to an option character which was unrecognized. 154 This must be initialized on some systems to avoid linking in the 155 system's own getopt implementation. */ 156 157 int optopt = '?'; 158 159 /* Describe how to deal with options that follow non-option ARGV-elements. 160 161 If the caller did not specify anything, 162 the default is REQUIRE_ORDER if the environment variable 163 POSIXLY_CORRECT is defined, PERMUTE otherwise. 164 165 REQUIRE_ORDER means don't recognize them as options; 166 stop option processing when the first non-option is seen. 167 This is what Unix does. 168 This mode of operation is selected by either setting the environment 169 variable POSIXLY_CORRECT, or using `+' as the first character 170 of the list of option characters. 171 172 PERMUTE is the default. We permute the contents of ARGV as we scan, 173 so that eventually all the non-options are at the end. This allows options 174 to be given in any order, even with programs that were not written to 175 expect this. 176 177 RETURN_IN_ORDER is an option available to programs that were written 178 to expect options and other ARGV-elements in any order and that care about 179 the ordering of the two. We describe each non-option ARGV-element 180 as if it were the argument of an option with character code 1. 181 Using `-' as the first character of the list of option characters 182 selects this mode of operation. 183 184 The special argument `--' forces an end of option-scanning regardless 185 of the value of `ordering'. In the case of RETURN_IN_ORDER, only 186 `--' can cause `getopt' to return -1 with `optind' != ARGC. */ 187 188 static enum 189 { 190 REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER 191 } ordering; 192 193 /* Value of POSIXLY_CORRECT environment variable. */ 194 static char *posixly_correct; 195 196 #ifdef __GNU_LIBRARY__ 198 /* We want to avoid inclusion of string.h with non-GNU libraries 199 because there are many ways it can cause trouble. 200 On some systems, it contains special magic macros that don't work 201 in GCC. */ 202 # include <string.h> 203 # define my_index strchr 204 #else 205 206 # if HAVE_STRING_H 207 # include <string.h> 208 # else 209 # include <strings.h> 210 # endif 211 212 /* Avoid depending on library functions or files 213 whose names are inconsistent. */ 214 215 #ifndef getenv 216 extern char *getenv (); 217 #endif 218 219 static char * 220 my_index (str, chr) 221 const char *str; 222 int chr; 223 { 224 while (*str) 225 { 226 if (*str == chr) 227 return (char *) str; 228 str++; 229 } 230 return 0; 231 } 232 233 /* If using GCC, we can safely declare strlen this way. 234 If not using GCC, it is ok not to declare it. */ 235 #ifdef __GNUC__ 236 /* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h. 237 That was relevant to code that was here before. */ 238 # if (!defined __STDC__ || !__STDC__) && !defined strlen 239 /* gcc with -traditional declares the built-in strlen to return int, 240 and has done so at least since version 2.4.5. -- rms. */ 241 extern int strlen (const char *); 242 # endif /* not __STDC__ */ 243 #endif /* __GNUC__ */ 244 245 #endif /* not __GNU_LIBRARY__ */ 246 247 /* Handle permutation of arguments. */ 249 250 /* Describe the part of ARGV that contains non-options that have 251 been skipped. `first_nonopt' is the index in ARGV of the first of them; 252 `last_nonopt' is the index after the last of them. */ 253 254 static int first_nonopt; 255 static int last_nonopt; 256 257 #ifdef _LIBC 258 /* Bash 2.0 gives us an environment variable containing flags 259 indicating ARGV elements that should not be considered arguments. */ 260 261 /* Defined in getopt_init.c */ 262 extern char *__getopt_nonoption_flags; 263 264 static int nonoption_flags_max_len; 265 static int nonoption_flags_len; 266 267 static int original_argc; 268 static char *const *original_argv; 269 270 /* Make sure the environment variable bash 2.0 puts in the environment 271 is valid for the getopt call we must make sure that the ARGV passed 272 to getopt is that one passed to the process. */ 273 static void 274 __attribute__ ((unused)) 275 store_args_and_env (int argc, char *const *argv) 276 { 277 /* XXX This is no good solution. We should rather copy the args so 278 that we can compare them later. But we must not use malloc(3). */ 279 original_argc = argc; 280 original_argv = argv; 281 } 282 # ifdef text_set_element 283 text_set_element (__libc_subinit, store_args_and_env); 284 # endif /* text_set_element */ 285 286 # define SWAP_FLAGS(ch1, ch2) \ 287 if (nonoption_flags_len > 0) \ 288 { \ 289 char __tmp = __getopt_nonoption_flags[ch1]; \ 290 __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \ 291 __getopt_nonoption_flags[ch2] = __tmp; \ 292 } 293 #else /* !_LIBC */ 294 # define SWAP_FLAGS(ch1, ch2) 295 #endif /* _LIBC */ 296 297 /* Exchange two adjacent subsequences of ARGV. 298 One subsequence is elements [first_nonopt,last_nonopt) 299 which contains all the non-options that have been skipped so far. 300 The other is elements [last_nonopt,optind), which contains all 301 the options processed since those non-options were skipped. 302 303 `first_nonopt' and `last_nonopt' are relocated so that they describe 304 the new indices of the non-options in ARGV after they are moved. */ 305 306 #if defined __STDC__ && __STDC__ 307 static void exchange (char **); 308 #endif 309 310 static void 311 exchange (argv) 312 char **argv; 313 { 314 int bottom = first_nonopt; 315 int middle = last_nonopt; 316 int top = optind; 317 char *tem; 318 319 /* Exchange the shorter segment with the far end of the longer segment. 320 That puts the shorter segment into the right place. 321 It leaves the longer segment in the right place overall, 322 but it consists of two parts that need to be swapped next. */ 323 324 #ifdef _LIBC 325 /* First make sure the handling of the `__getopt_nonoption_flags' 326 string can work normally. Our top argument must be in the range 327 of the string. */ 328 if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len) 329 { 330 /* We must extend the array. The user plays games with us and 331 presents new arguments. */ 332 char *new_str = malloc (top + 1); 333 if (new_str == NULL) 334 nonoption_flags_len = nonoption_flags_max_len = 0; 335 else 336 { 337 memset (__mempcpy (new_str, __getopt_nonoption_flags, 338 nonoption_flags_max_len), 339 '\0', top + 1 - nonoption_flags_max_len); 340 nonoption_flags_max_len = top + 1; 341 __getopt_nonoption_flags = new_str; 342 } 343 } 344 #endif 345 346 while (top > middle && middle > bottom) 347 { 348 if (top - middle > middle - bottom) 349 { 350 /* Bottom segment is the short one. */ 351 int len = middle - bottom; 352 register int i; 353 354 /* Swap it with the top part of the top segment. */ 355 for (i = 0; i < len; i++) 356 { 357 tem = argv[bottom + i]; 358 argv[bottom + i] = argv[top - (middle - bottom) + i]; 359 argv[top - (middle - bottom) + i] = tem; 360 SWAP_FLAGS (bottom + i, top - (middle - bottom) + i); 361 } 362 /* Exclude the moved bottom segment from further swapping. */ 363 top -= len; 364 } 365 else 366 { 367 /* Top segment is the short one. */ 368 int len = top - middle; 369 register int i; 370 371 /* Swap it with the bottom part of the bottom segment. */ 372 for (i = 0; i < len; i++) 373 { 374 tem = argv[bottom + i]; 375 argv[bottom + i] = argv[middle + i]; 376 argv[middle + i] = tem; 377 SWAP_FLAGS (bottom + i, middle + i); 378 } 379 /* Exclude the moved top segment from further swapping. */ 380 bottom += len; 381 } 382 } 383 384 /* Update records for the slots the non-options now occupy. */ 385 386 first_nonopt += (optind - last_nonopt); 387 last_nonopt = optind; 388 } 389 390 /* Initialize the internal data when the first call is made. */ 391 392 #if defined __STDC__ && __STDC__ 393 static const char *_getopt_initialize (int, char *const *, const char *); 394 #endif 395 static const char * 396 _getopt_initialize (argc, argv, optstring) 397 int argc; 398 char *const *argv; 399 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 463 given in OPTSTRING. 464 465 If an element of ARGV starts with '-', and is not exactly "-" or "--", 466 then it is an option element. The characters of this element 467 (aside from the initial '-') are option characters. If `getopt' 468 is called repeatedly, it returns successively each of the option characters 469 from each of the option elements. 470 471 If `getopt' finds another option character, it returns that character, 472 updating `optind' and `nextchar' so that the next call to `getopt' can 473 resume the scan with the following option character or ARGV-element. 474 475 If there are no more option characters, `getopt' returns -1. 476 Then `optind' is the index in ARGV of the first ARGV-element 477 that is not an option. (The ARGV-elements have been permuted 478 so that those that are not options now come last.) 479 480 OPTSTRING is a string containing the legitimate option characters. 481 If an option character is seen that is not listed in OPTSTRING, 482 return '?' after printing an error message. If you set `opterr' to 483 zero, the error message is suppressed but we still return '?'. 484 485 If a char in OPTSTRING is followed by a colon, that means it wants an arg, 486 so the following text in the same ARGV-element, or the text of the following 487 ARGV-element, is returned in `optarg'. Two colons mean an option that 488 wants an optional arg; if there is text in the current ARGV-element, 489 it is returned in `optarg', otherwise `optarg' is set to zero. 490 491 If OPTSTRING starts with `-' or `+', it requests different methods of 492 handling the non-option ARGV-elements. 493 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above. 494 495 Long-named options begin with `--' instead of `-'. 496 Their names may be abbreviated as long as the abbreviation is unique 497 or is an exact match for some defined option. If they have an 498 argument, it follows the option name in the same ARGV-element, separated 499 from the option name by a `=', or else the in next ARGV-element. 500 When `getopt' finds a long-named option, it returns 0 if that option's 501 `flag' field is nonzero, the value of the option's `val' field 502 if the `flag' field is zero. 503 504 The elements of ARGV aren't really const, because we permute them. 505 But we pretend they're const in the prototype to be compatible 506 with other systems. 507 508 LONGOPTS is a vector of `struct option' terminated by an 509 element containing a name which is zero. 510 511 LONGIND returns the index in LONGOPT of the long-named option found. 512 It is only valid when a long-named option has been found by the most 513 recent call. 514 515 If LONG_ONLY is nonzero, '-' as well as '--' can introduce 516 long-named options. */ 517 518 int 519 _getopt_internal (argc, argv, optstring, longopts, longind, long_only) 520 int argc; 521 char *const *argv; 522 const char *optstring; 523 const struct option *longopts; 524 int *longind; 525 int long_only; 526 { 527 optarg = NULL; 528 529 if (optind == 0 || !__getopt_initialized) 530 { 531 if (optind == 0) 532 optind = 1; /* Don't scan ARGV[0], the program name. */ 533 optstring = _getopt_initialize (argc, argv, optstring); 534 __getopt_initialized = 1; 535 } 536 537 /* Test whether ARGV[optind] points to a non-option argument. 538 Either it does not have option syntax, or there is an environment flag 539 from the shell indicating it is not an option. The later information 540 is only used when the used in the GNU libc. */ 541 #ifdef _LIBC 542 # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \ 543 || (optind < nonoption_flags_len \ 544 && __getopt_nonoption_flags[optind] == '1')) 545 #else 546 # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0') 547 #endif 548 549 if (nextchar == NULL || *nextchar == '\0') 550 { 551 /* Advance to the next ARGV-element. */ 552 553 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been 554 moved back by the user (who may also have changed the arguments). */ 555 if (last_nonopt > optind) 556 last_nonopt = optind; 557 if (first_nonopt > optind) 558 first_nonopt = optind; 559 560 if (ordering == PERMUTE) 561 { 562 /* If we have just processed some options following some non-options, 563 exchange them so that the options come first. */ 564 565 if (first_nonopt != last_nonopt && last_nonopt != optind) 566 exchange ((char **) argv); 567 else if (last_nonopt != optind) 568 first_nonopt = optind; 569 570 /* Skip any additional non-options 571 and extend the range of non-options previously skipped. */ 572 573 while (optind < argc && NONOPTION_P) 574 optind++; 575 last_nonopt = optind; 576 } 577 578 /* The special ARGV-element `--' means premature end of options. 579 Skip it like a null option, 580 then exchange with previous non-options as if it were an option, 581 then skip everything else like a non-option. */ 582 583 if (optind != argc && !strcmp (argv[optind], "--")) 584 { 585 optind++; 586 587 if (first_nonopt != last_nonopt && last_nonopt != optind) 588 exchange ((char **) argv); 589 else if (first_nonopt == last_nonopt) 590 first_nonopt = optind; 591 last_nonopt = argc; 592 593 optind = argc; 594 } 595 596 /* If we have done all the ARGV-elements, stop the scan 597 and back over any non-options that we skipped and permuted. */ 598 599 if (optind == argc) 600 { 601 /* Set the next-arg-index to point at the non-options 602 that we previously skipped, so the caller will digest them. */ 603 if (first_nonopt != last_nonopt) 604 optind = first_nonopt; 605 return -1; 606 } 607 608 /* If we have come to a non-option and did not permute it, 609 either stop the scan or describe it to the caller and pass it by. */ 610 611 if (NONOPTION_P) 612 { 613 if (ordering == REQUIRE_ORDER) 614 return -1; 615 optarg = argv[optind++]; 616 return 1; 617 } 618 619 /* We have found another option-ARGV-element. 620 Skip the initial punctuation. */ 621 622 nextchar = (argv[optind] + 1 623 + (longopts != NULL && argv[optind][1] == '-')); 624 } 625 626 /* Decode the current option-ARGV-element. */ 627 628 /* Check whether the ARGV-element is a long option. 629 630 If long_only and the ARGV-element has the form "-f", where f is 631 a valid short option, don't consider it an abbreviated form of 632 a long option that starts with f. Otherwise there would be no 633 way to give the -f short option. 634 635 On the other hand, if there's a long option "fubar" and 636 the ARGV-element is "-fu", do consider that an abbreviation of 637 the long option, just like "--fu", and not "-f" with arg "u". 638 639 This distinction seems to be the most useful approach. */ 640 641 if (longopts != NULL 642 && (argv[optind][1] == '-' 643 || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1]))))) 644 { 645 char *nameend; 646 const struct option *p; 647 const struct option *pfound = NULL; 648 int exact = 0; 649 int ambig = 0; 650 int indfound = -1; 651 int option_index; 652 653 for (nameend = nextchar; *nameend && *nameend != '='; nameend++) 654 /* Do nothing. */ ; 655 656 /* Test all long options for either exact match 657 or abbreviated matches. */ 658 for (p = longopts, option_index = 0; p->name; p++, option_index++) 659 if (!strncmp (p->name, nextchar, nameend - nextchar)) 660 { 661 if ((unsigned int) (nameend - nextchar) 662 == (unsigned int) strlen (p->name)) 663 { 664 /* Exact match found. */ 665 pfound = p; 666 indfound = option_index; 667 exact = 1; 668 break; 669 } 670 else if (pfound == NULL) 671 { 672 /* First nonexact match found. */ 673 pfound = p; 674 indfound = option_index; 675 } 676 else 677 /* Second or later nonexact match found. */ 678 ambig = 1; 679 } 680 681 if (ambig && !exact) 682 { 683 if (opterr) 684 fprintf (stderr, _("%s: option `%s' is ambiguous\n"), 685 argv[0], argv[optind]); 686 nextchar += strlen (nextchar); 687 optind++; 688 optopt = 0; 689 return '?'; 690 } 691 692 if (pfound != NULL) 693 { 694 option_index = indfound; 695 optind++; 696 if (*nameend) 697 { 698 /* Don't test has_arg with >, because some C compilers don't 699 allow it to be used on enums. */ 700 if (pfound->has_arg) 701 optarg = nameend + 1; 702 else 703 { 704 if (opterr) 705 { 706 if (argv[optind - 1][1] == '-') 707 /* --option */ 708 fprintf (stderr, 709 _("%s: option `--%s' doesn't allow an argument\n"), 710 argv[0], pfound->name); 711 else 712 /* +option or -option */ 713 fprintf (stderr, 714 _("%s: option `%c%s' doesn't allow an argument\n"), 715 argv[0], argv[optind - 1][0], pfound->name); 716 } 717 nextchar += strlen (nextchar); 718 719 optopt = pfound->val; 720 return '?'; 721 } 722 } 723 else if (pfound->has_arg == 1) 724 { 725 if (optind < argc) 726 optarg = argv[optind++]; 727 else 728 { 729 if (opterr) 730 fprintf (stderr, 731 _("%s: option `%s' requires an argument\n"), 732 argv[0], argv[optind - 1]); 733 nextchar += strlen (nextchar); 734 optopt = pfound->val; 735 return optstring[0] == ':' ? ':' : '?'; 736 } 737 } 738 nextchar += strlen (nextchar); 739 if (longind != NULL) 740 *longind = option_index; 741 if (pfound->flag) 742 { 743 *(pfound->flag) = pfound->val; 744 return 0; 745 } 746 return pfound->val; 747 } 748 749 /* Can't find it as a long option. If this is not getopt_long_only, 750 or the option starts with '--' or is not a valid short 751 option, then it's an error. 752 Otherwise interpret it as a short option. */ 753 if (!long_only || argv[optind][1] == '-' 754 || my_index (optstring, *nextchar) == NULL) 755 { 756 if (opterr) 757 { 758 if (argv[optind][1] == '-') 759 /* --option */ 760 fprintf (stderr, _("%s: unrecognized option `--%s'\n"), 761 argv[0], nextchar); 762 else 763 /* +option or -option */ 764 fprintf (stderr, _("%s: unrecognized option `%c%s'\n"), 765 argv[0], argv[optind][0], nextchar); 766 } 767 nextchar = (char *) ""; 768 optind++; 769 optopt = 0; 770 return '?'; 771 } 772 } 773 774 /* Look at and handle the next short option-character. */ 775 776 { 777 char c = *nextchar++; 778 char *temp = my_index (optstring, c); 779 780 /* Increment `optind' when we start to process its last character. */ 781 if (*nextchar == '\0') 782 ++optind; 783 784 if (temp == NULL || c == ':') 785 { 786 if (opterr) 787 { 788 if (posixly_correct) 789 /* 1003.2 specifies the format of this message. */ 790 fprintf (stderr, _("%s: illegal option -- %c\n"), 791 argv[0], c); 792 else 793 fprintf (stderr, _("%s: invalid option -- %c\n"), 794 argv[0], c); 795 } 796 optopt = c; 797 return '?'; 798 } 799 /* Convenience. Treat POSIX -W foo same as long option --foo */ 800 if (temp[0] == 'W' && temp[1] == ';') 801 { 802 char *nameend; 803 const struct option *p; 804 const struct option *pfound = NULL; 805 int exact = 0; 806 int ambig = 0; 807 int indfound = 0; 808 int option_index; 809 810 /* This is an option that requires an argument. */ 811 if (*nextchar != '\0') 812 { 813 optarg = nextchar; 814 /* If we end this ARGV-element by taking the rest as an arg, 815 we must advance to the next element now. */ 816 optind++; 817 } 818 else if (optind == argc) 819 { 820 if (opterr) 821 { 822 /* 1003.2 specifies the format of this message. */ 823 fprintf (stderr, _("%s: option requires an argument -- %c\n"), 824 argv[0], c); 825 } 826 optopt = c; 827 if (optstring[0] == ':') 828 c = ':'; 829 else 830 c = '?'; 831 return c; 832 } 833 else 834 /* We already incremented `optind' once; 835 increment it again when taking next ARGV-elt as argument. */ 836 optarg = argv[optind++]; 837 838 /* optarg is now the argument, see if it's in the 839 table of longopts. */ 840 841 for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++) 842 /* Do nothing. */ ; 843 844 /* Test all long options for either exact match 845 or abbreviated matches. */ 846 for (p = longopts, option_index = 0; p->name; p++, option_index++) 847 if (!strncmp (p->name, nextchar, nameend - nextchar)) 848 { 849 if ((unsigned int) (nameend - nextchar) == strlen (p->name)) 850 { 851 /* Exact match found. */ 852 pfound = p; 853 indfound = option_index; 854 exact = 1; 855 break; 856 } 857 else if (pfound == NULL) 858 { 859 /* First nonexact match found. */ 860 pfound = p; 861 indfound = option_index; 862 } 863 else 864 /* Second or later nonexact match found. */ 865 ambig = 1; 866 } 867 if (ambig && !exact) 868 { 869 if (opterr) 870 fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"), 871 argv[0], argv[optind]); 872 nextchar += strlen (nextchar); 873 optind++; 874 return '?'; 875 } 876 if (pfound != NULL) 877 { 878 option_index = indfound; 879 if (*nameend) 880 { 881 /* Don't test has_arg with >, because some C compilers don't 882 allow it to be used on enums. */ 883 if (pfound->has_arg) 884 optarg = nameend + 1; 885 else 886 { 887 if (opterr) 888 fprintf (stderr, _("\ 889 %s: option `-W %s' doesn't allow an argument\n"), 890 argv[0], pfound->name); 891 892 nextchar += strlen (nextchar); 893 return '?'; 894 } 895 } 896 else if (pfound->has_arg == 1) 897 { 898 if (optind < argc) 899 optarg = argv[optind++]; 900 else 901 { 902 if (opterr) 903 fprintf (stderr, 904 _("%s: option `%s' requires an argument\n"), 905 argv[0], argv[optind - 1]); 906 nextchar += strlen (nextchar); 907 return optstring[0] == ':' ? ':' : '?'; 908 } 909 } 910 nextchar += strlen (nextchar); 911 if (longind != NULL) 912 *longind = option_index; 913 if (pfound->flag) 914 { 915 *(pfound->flag) = pfound->val; 916 return 0; 917 } 918 return pfound->val; 919 } 920 nextchar = NULL; 921 return 'W'; /* Let the application handle it. */ 922 } 923 if (temp[1] == ':') 924 { 925 if (temp[2] == ':') 926 { 927 /* This is an option that accepts an argument optionally. */ 928 if (*nextchar != '\0') 929 { 930 optarg = nextchar; 931 optind++; 932 } 933 else 934 optarg = NULL; 935 nextchar = NULL; 936 } 937 else 938 { 939 /* This is an option that requires an argument. */ 940 if (*nextchar != '\0') 941 { 942 optarg = nextchar; 943 /* If we end this ARGV-element by taking the rest as an arg, 944 we must advance to the next element now. */ 945 optind++; 946 } 947 else if (optind == argc) 948 { 949 if (opterr) 950 { 951 /* 1003.2 specifies the format of this message. */ 952 fprintf (stderr, 953 _("%s: option requires an argument -- %c\n"), 954 argv[0], c); 955 } 956 optopt = c; 957 if (optstring[0] == ':') 958 c = ':'; 959 else 960 c = '?'; 961 } 962 else 963 /* We already incremented `optind' once; 964 increment it again when taking next ARGV-elt as argument. */ 965 optarg = argv[optind++]; 966 nextchar = NULL; 967 } 968 } 969 return c; 970 } 971 } 972 973 int 974 getopt (argc, argv, optstring) 975 int argc; 976 char *const *argv; 977 const char *optstring; 978 { 979 return _getopt_internal (argc, argv, optstring, 980 (const struct option *) 0, 981 (int *) 0, 982 0); 983 } 984 985 #endif /* Not ELIDE_CODE. */ 986 987 #ifdef TEST 989 990 /* Compile with -DTEST to make an executable for use in testing 991 the above definition of `getopt'. */ 992 993 int 994 main (argc, argv) 995 int argc; 996 char **argv; 997 { 998 int c; 999 int digit_optind = 0; 1000 1001 while (1) 1002 { 1003 int this_option_optind = optind ? optind : 1; 1004 1005 c = getopt (argc, argv, "abc:d:0123456789"); 1006 if (c == -1) 1007 break; 1008 1009 switch (c) 1010 { 1011 case '0': 1012 case '1': 1013 case '2': 1014 case '3': 1015 case '4': 1016 case '5': 1017 case '6': 1018 case '7': 1019 case '8': 1020 case '9': 1021 if (digit_optind != 0 && digit_optind != this_option_optind) 1022 printf ("digits occur in two different argv-elements.\n"); 1023 digit_optind = this_option_optind; 1024 printf ("option %c\n", c); 1025 break; 1026 1027 case 'a': 1028 printf ("option a\n"); 1029 break; 1030 1031 case 'b': 1032 printf ("option b\n"); 1033 break; 1034 1035 case 'c': 1036 printf ("option c with value `%s'\n", optarg); 1037 break; 1038 1039 case '?': 1040 break; 1041 1042 default: 1043 printf ("?? getopt returned character code 0%o ??\n", c); 1044 } 1045 } 1046 1047 if (optind < argc) 1048 { 1049 printf ("non-option ARGV-elements: "); 1050 while (optind < argc) 1051 printf ("%s ", argv[optind++]); 1052 printf ("\n"); 1053 } 1054 1055 exit (0); 1056 } 1057 1058 #endif /* TEST */ 1059
