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 roland@gnu.ai.mit.edu 4 before changing it! 5 6 Copyright (C) 1987, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97 7 Free Software Foundation, Inc. 8 9 This file is part of the GNU C Library. Its master source is NOT part of 10 the C library, however. The master source lives in /gd/gnu/lib. 11 12 The GNU C Library is free software; you can redistribute it and/or 13 modify it under the terms of the GNU Library General Public License as 14 published by the Free Software Foundation; either version 2 of the 15 License, or (at your option) any later version. 16 17 The GNU C Library 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 GNU 20 Library General Public License for more details. 21 22 You should have received a copy of the GNU Library General Public 23 License along with the GNU C Library; see the file COPYING.LIB. If not, 24 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, 25 Boston, MA 02111-1307, 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 /* This needs to come after some library #include 66 to get __GNU_LIBRARY__ defined. */ 67 #ifdef __GNU_LIBRARY__ 68 /* Don't include stdlib.h for non-GNU C libraries because some of them 69 contain conflicting prototypes for getopt. */ 70 #include <stdlib.h> 71 #include <unistd.h> 72 #endif /* GNU C library. */ 73 74 #ifdef VMS 75 #include <unixlib.h> 76 #if HAVE_STRING_H - 0 77 #include <string.h> 78 #endif 79 #endif 80 81 #if defined (WIN32) && !defined (__CYGWIN32__) 82 /* It's not Unix, really. See? Capital letters. */ 83 #include <windows.h> 84 #define getpid() GetCurrentProcessId() 85 #endif 86 87 #ifndef _ 88 /* This is for other GNU distributions with internationalized messages. 89 When compiling libc, the _ macro is predefined. */ 90 #ifdef HAVE_LIBINTL_H 91 #include <libintl.h> 92 #define _(msgid) gettext (msgid) 93 #else 94 #define _(msgid) (msgid) 95 #endif 96 #endif 97 98 /* This version of `getopt' appears to the caller like standard Unix `getopt' 99 but it behaves differently for the user, since it allows the user 100 to intersperse the options with the other arguments. 101 102 As `getopt' works, it permutes the elements of ARGV so that, 103 when it is done, all the options precede everything else. Thus 104 all application programs are extended to handle flexible argument order. 105 106 Setting the environment variable POSIXLY_CORRECT disables permutation. 107 Then the behavior is completely standard. 108 109 GNU application programs can use a third alternative mode in which 110 they can distinguish the relative order of options and other arguments. */ 111 112 #include "getopt.h" 113 114 /* For communication from `getopt' to the caller. 115 When `getopt' finds an option that takes an argument, 116 the argument value is returned here. 117 Also, when `ordering' is RETURN_IN_ORDER, 118 each non-option ARGV-element is returned here. */ 119 120 char *optarg = NULL; 121 122 /* Index in ARGV of the next element to be scanned. 123 This is used for communication to and from the caller 124 and for communication between successive calls to `getopt'. 125 126 On entry to `getopt', zero means this is the first call; initialize. 127 128 When `getopt' returns -1, this is the index of the first of the 129 non-option elements that the caller should itself scan. 130 131 Otherwise, `optind' communicates from one call to the next 132 how much of ARGV has been scanned so far. */ 133 134 /* 1003.2 says this must be 1 before any call. */ 135 int optind = 1; 136 137 /* Formerly, initialization of getopt depended on optind==0, which 138 causes problems with re-calling getopt as programs generally don't 139 know that. */ 140 141 int __getopt_initialized = 0; 142 143 /* The next char to be scanned in the option-element 144 in which the last option character we returned was found. 145 This allows us to pick up the scan where we left off. 146 147 If this is zero, or a null string, it means resume the scan 148 by advancing to the next ARGV-element. */ 149 150 static char *nextchar; 151 152 /* Callers store zero here to inhibit the error message 153 for unrecognized options. */ 154 155 int opterr = 1; 156 157 /* Set to an option character which was unrecognized. 158 This must be initialized on some systems to avoid linking in the 159 system's own getopt implementation. */ 160 161 int optopt = '?'; 162 163 /* Describe how to deal with options that follow non-option ARGV-elements. 164 165 If the caller did not specify anything, 166 the default is REQUIRE_ORDER if the environment variable 167 POSIXLY_CORRECT is defined, PERMUTE otherwise. 168 169 REQUIRE_ORDER means don't recognize them as options; 170 stop option processing when the first non-option is seen. 171 This is what Unix does. 172 This mode of operation is selected by either setting the environment 173 variable POSIXLY_CORRECT, or using `+' as the first character 174 of the list of option characters. 175 176 PERMUTE is the default. We permute the contents of ARGV as we scan, 177 so that eventually all the non-options are at the end. This allows options 178 to be given in any order, even with programs that were not written to 179 expect this. 180 181 RETURN_IN_ORDER is an option available to programs that were written 182 to expect options and other ARGV-elements in any order and that care about 183 the ordering of the two. We describe each non-option ARGV-element 184 as if it were the argument of an option with character code 1. 185 Using `-' as the first character of the list of option characters 186 selects this mode of operation. 187 188 The special argument `--' forces an end of option-scanning regardless 189 of the value of `ordering'. In the case of RETURN_IN_ORDER, only 190 `--' can cause `getopt' to return -1 with `optind' != ARGC. */ 191 192 static enum 193 { 194 REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER 195 } 196 ordering; 197 198 /* Value of POSIXLY_CORRECT environment variable. */ 199 static char *posixly_correct; 200 201 #ifdef __GNU_LIBRARY__ 202 /* We want to avoid inclusion of string.h with non-GNU libraries 203 because there are many ways it can cause trouble. 204 On some systems, it contains special magic macros that don't work 205 in GCC. */ 206 #include <string.h> 207 #define my_index strchr 208 #else 209 210 /* Avoid depending on library functions or files 211 whose names are inconsistent. */ 212 213 char *getenv(); 214 215 static char * my_index(str,chr)216 my_index(str, chr) 217 const char *str; 218 int chr; 219 { 220 while (*str) 221 { 222 if (*str == chr) 223 return (char *) str; 224 str++; 225 } 226 return 0; 227 } 228 229 /* If using GCC, we can safely declare strlen this way. 230 If not using GCC, it is ok not to declare it. */ 231 #ifdef __GNUC__ 232 /* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h. 233 That was relevant to code that was here before. */ 234 #if !defined (__STDC__) || !__STDC__ 235 /* gcc with -traditional declares the built-in strlen to return int, 236 and has done so at least since version 2.4.5. -- rms. */ 237 extern int strlen(const char *); 238 239 #endif /* not __STDC__ */ 240 #endif /* __GNUC__ */ 241 242 #endif /* not __GNU_LIBRARY__ */ 243 244 /* Handle permutation of arguments. */ 245 246 /* Describe the part of ARGV that contains non-options that have 247 been skipped. `first_nonopt' is the index in ARGV of the first of them; 248 `last_nonopt' is the index after the last of them. */ 249 250 static int first_nonopt; 251 static int last_nonopt; 252 253 #ifdef _LIBC 254 /* Bash 2.0 gives us an environment variable containing flags 255 indicating ARGV elements that should not be considered arguments. */ 256 257 static const char *nonoption_flags; 258 static int nonoption_flags_len; 259 260 static int original_argc; 261 static char *const *original_argv; 262 263 /* Make sure the environment variable bash 2.0 puts in the environment 264 is valid for the getopt call we must make sure that the ARGV passed 265 to getopt is that one passed to the process. */ 266 static void store_args(int argc, char *const *argv) __attribute__((unused)); 267 static void store_args(int argc,char * const * argv)268 store_args(int argc, char *const *argv) 269 { 270 /* XXX This is no good solution. We should rather copy the args so 271 that we can compare them later. But we must not use malloc(3). */ 272 original_argc = argc; 273 original_argv = argv; 274 } 275 text_set_element(__libc_subinit, store_args); 276 #endif 277 278 /* Exchange two adjacent subsequences of ARGV. 279 One subsequence is elements [first_nonopt,last_nonopt) 280 which contains all the non-options that have been skipped so far. 281 The other is elements [last_nonopt,optind), which contains all 282 the options processed since those non-options were skipped. 283 284 `first_nonopt' and `last_nonopt' are relocated so that they describe 285 the new indices of the non-options in ARGV after they are moved. */ 286 287 #if defined (__STDC__) && __STDC__ 288 static void exchange(char **); 289 290 #endif 291 292 static void exchange(argv)293 exchange(argv) 294 char **argv; 295 { 296 int bottom = first_nonopt; 297 int middle = last_nonopt; 298 int top = optind; 299 char *tem; 300 301 /* Exchange the shorter segment with the far end of the longer segment. 302 That puts the shorter segment into the right place. 303 It leaves the longer segment in the right place overall, 304 but it consists of two parts that need to be swapped next. */ 305 306 while (top > middle && middle > bottom) 307 { 308 if (top - middle > middle - bottom) 309 { 310 /* Bottom segment is the short one. */ 311 int len = middle - bottom; 312 register int i; 313 314 /* Swap it with the top part of the top segment. */ 315 for (i = 0; i < len; i++) 316 { 317 tem = argv[bottom + i]; 318 argv[bottom + i] = argv[top - (middle - bottom) + i]; 319 argv[top - (middle - bottom) + i] = tem; 320 } 321 /* Exclude the moved bottom segment from further swapping. */ 322 top -= len; 323 } 324 else 325 { 326 /* Top segment is the short one. */ 327 int len = top - middle; 328 register int i; 329 330 /* Swap it with the bottom part of the bottom segment. */ 331 for (i = 0; i < len; i++) 332 { 333 tem = argv[bottom + i]; 334 argv[bottom + i] = argv[middle + i]; 335 argv[middle + i] = tem; 336 } 337 /* Exclude the moved top segment from further swapping. */ 338 bottom += len; 339 } 340 } 341 342 /* Update records for the slots the non-options now occupy. */ 343 344 first_nonopt += (optind - last_nonopt); 345 last_nonopt = optind; 346 } 347 348 /* Initialize the internal data when the first call is made. */ 349 350 #if defined (__STDC__) && __STDC__ 351 static const char *_getopt_initialize(int, char *const *, const char *); 352 353 #endif 354 static const char * _getopt_initialize(argc,argv,optstring)355 _getopt_initialize(argc, argv, optstring) 356 int argc; 357 char *const *argv; 358 const char *optstring; 359 { 360 /* Start processing options with ARGV-element 1 (since ARGV-element 0 361 is the program name); the sequence of previously skipped 362 non-option ARGV-elements is empty. */ 363 364 first_nonopt = last_nonopt = optind = 1; 365 366 nextchar = NULL; 367 368 posixly_correct = getenv("POSIXLY_CORRECT"); 369 370 /* Determine how to handle the ordering of options and nonoptions. */ 371 372 if (optstring[0] == '-') 373 { 374 ordering = RETURN_IN_ORDER; 375 ++optstring; 376 } 377 else if (optstring[0] == '+') 378 { 379 ordering = REQUIRE_ORDER; 380 ++optstring; 381 } 382 else if (posixly_correct != NULL) 383 ordering = REQUIRE_ORDER; 384 else 385 ordering = PERMUTE; 386 387 #ifdef _LIBC 388 if (posixly_correct == NULL 389 && argc == original_argc && argv == original_argv) 390 { 391 /* Bash 2.0 puts a special variable in the environment for each 392 command it runs, specifying which ARGV elements are the results of 393 file name wildcard expansion and therefore should not be 394 considered as options. */ 395 char var[100]; 396 397 sprintf(var, "_%d_GNU_nonoption_argv_flags_", getpid()); 398 nonoption_flags = getenv(var); 399 if (nonoption_flags == NULL) 400 nonoption_flags_len = 0; 401 else 402 nonoption_flags_len = strlen(nonoption_flags); 403 } 404 else 405 nonoption_flags_len = 0; 406 #endif 407 408 return optstring; 409 } 410 411 /* Scan elements of ARGV (whose length is ARGC) for option characters 412 given in OPTSTRING. 413 414 If an element of ARGV starts with '-', and is not exactly "-" or "--", 415 then it is an option element. The characters of this element 416 (aside from the initial '-') are option characters. If `getopt' 417 is called repeatedly, it returns successively each of the option characters 418 from each of the option elements. 419 420 If `getopt' finds another option character, it returns that character, 421 updating `optind' and `nextchar' so that the next call to `getopt' can 422 resume the scan with the following option character or ARGV-element. 423 424 If there are no more option characters, `getopt' returns -1. 425 Then `optind' is the index in ARGV of the first ARGV-element 426 that is not an option. (The ARGV-elements have been permuted 427 so that those that are not options now come last.) 428 429 OPTSTRING is a string containing the legitimate option characters. 430 If an option character is seen that is not listed in OPTSTRING, 431 return '?' after printing an error message. If you set `opterr' to 432 zero, the error message is suppressed but we still return '?'. 433 434 If a char in OPTSTRING is followed by a colon, that means it wants an arg, 435 so the following text in the same ARGV-element, or the text of the following 436 ARGV-element, is returned in `optarg'. Two colons mean an option that 437 wants an optional arg; if there is text in the current ARGV-element, 438 it is returned in `optarg', otherwise `optarg' is set to zero. 439 440 If OPTSTRING starts with `-' or `+', it requests different methods of 441 handling the non-option ARGV-elements. 442 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above. 443 444 Long-named options begin with `--' instead of `-'. 445 Their names may be abbreviated as long as the abbreviation is unique 446 or is an exact match for some defined option. If they have an 447 argument, it follows the option name in the same ARGV-element, separated 448 from the option name by a `=', or else the in next ARGV-element. 449 When `getopt' finds a long-named option, it returns 0 if that option's 450 `flag' field is nonzero, the value of the option's `val' field 451 if the `flag' field is zero. 452 453 The elements of ARGV aren't really const, because we permute them. 454 But we pretend they're const in the prototype to be compatible 455 with other systems. 456 457 LONGOPTS is a vector of `struct option' terminated by an 458 element containing a name which is zero. 459 460 LONGIND returns the index in LONGOPT of the long-named option found. 461 It is only valid when a long-named option has been found by the most 462 recent call. 463 464 If LONG_ONLY is nonzero, '-' as well as '--' can introduce 465 long-named options. */ 466 467 int _getopt_internal(argc,argv,optstring,longopts,longind,long_only)468 _getopt_internal(argc, argv, optstring, longopts, longind, long_only) 469 int argc; 470 char *const *argv; 471 const char *optstring; 472 const struct option *longopts; 473 int *longind; 474 int long_only; 475 { 476 optarg = NULL; 477 478 if (!__getopt_initialized || optind == 0) 479 { 480 optstring = _getopt_initialize(argc, argv, optstring); 481 optind = 1; /* Don't scan ARGV[0], the program name. */ 482 __getopt_initialized = 1; 483 } 484 485 /* Test whether ARGV[optind] points to a non-option argument. 486 Either it does not have option syntax, or there is an environment flag 487 from the shell indicating it is not an option. The later information 488 is only used when the used in the GNU libc. */ 489 #ifdef _LIBC 490 #define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \ 491 || (optind < nonoption_flags_len \ 492 && nonoption_flags[optind] == '1')) 493 #else 494 #define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0') 495 #endif 496 497 if (nextchar == NULL || *nextchar == '\0') 498 { 499 /* Advance to the next ARGV-element. */ 500 501 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been 502 moved back by the user (who may also have changed the arguments). */ 503 if (last_nonopt > optind) 504 last_nonopt = optind; 505 if (first_nonopt > optind) 506 first_nonopt = optind; 507 508 if (ordering == PERMUTE) 509 { 510 /* If we have just processed some options following some non-options, 511 exchange them so that the options come first. */ 512 513 if (first_nonopt != last_nonopt && last_nonopt != optind) 514 exchange((char **) argv); 515 else if (last_nonopt != optind) 516 first_nonopt = optind; 517 518 /* Skip any additional non-options 519 and extend the range of non-options previously skipped. */ 520 521 while (optind < argc && NONOPTION_P) 522 optind++; 523 last_nonopt = optind; 524 } 525 526 /* The special ARGV-element `--' means premature end of options. 527 Skip it like a null option, 528 then exchange with previous non-options as if it were an option, 529 then skip everything else like a non-option. */ 530 531 if (optind != argc && !strcmp(argv[optind], "--")) 532 { 533 optind++; 534 535 if (first_nonopt != last_nonopt && last_nonopt != optind) 536 exchange((char **) argv); 537 else if (first_nonopt == last_nonopt) 538 first_nonopt = optind; 539 last_nonopt = argc; 540 541 optind = argc; 542 } 543 544 /* If we have done all the ARGV-elements, stop the scan 545 and back over any non-options that we skipped and permuted. */ 546 547 if (optind == argc) 548 { 549 /* Set the next-arg-index to point at the non-options 550 that we previously skipped, so the caller will digest them. */ 551 if (first_nonopt != last_nonopt) 552 optind = first_nonopt; 553 return -1; 554 } 555 556 /* If we have come to a non-option and did not permute it, 557 either stop the scan or describe it to the caller and pass it by. */ 558 559 if (NONOPTION_P) 560 { 561 if (ordering == REQUIRE_ORDER) 562 return -1; 563 optarg = argv[optind++]; 564 return 1; 565 } 566 567 /* We have found another option-ARGV-element. 568 Skip the initial punctuation. */ 569 570 nextchar = (argv[optind] + 1 571 + (longopts != NULL && argv[optind][1] == '-')); 572 } 573 574 /* Decode the current option-ARGV-element. */ 575 576 /* Check whether the ARGV-element is a long option. 577 578 If long_only and the ARGV-element has the form "-f", where f is 579 a valid short option, don't consider it an abbreviated form of 580 a long option that starts with f. Otherwise there would be no 581 way to give the -f short option. 582 583 On the other hand, if there's a long option "fubar" and 584 the ARGV-element is "-fu", do consider that an abbreviation of 585 the long option, just like "--fu", and not "-f" with arg "u". 586 587 This distinction seems to be the most useful approach. */ 588 589 if (longopts != NULL 590 && (argv[optind][1] == '-' 591 || (long_only && (argv[optind][2] || !my_index(optstring, argv[optind][1]))))) 592 { 593 char *nameend; 594 const struct option *p; 595 const struct option *pfound = NULL; 596 int exact = 0; 597 int ambig = 0; 598 int indfound = -1; 599 int option_index; 600 601 for (nameend = nextchar; *nameend && *nameend != '='; nameend++) 602 /* Do nothing. */ ; 603 604 /* Test all long options for either exact match 605 or abbreviated matches. */ 606 for (p = longopts, option_index = 0; p->name; p++, option_index++) 607 if (!strncmp(p->name, nextchar, nameend - nextchar)) 608 { 609 if ((unsigned int) (nameend - nextchar) 610 == (unsigned int) strlen(p->name)) 611 { 612 /* Exact match found. */ 613 pfound = p; 614 indfound = option_index; 615 exact = 1; 616 break; 617 } 618 else if (pfound == NULL) 619 { 620 /* First nonexact match found. */ 621 pfound = p; 622 indfound = option_index; 623 } 624 else 625 /* Second or later nonexact match found. */ 626 ambig = 1; 627 } 628 629 if (ambig && !exact) 630 { 631 if (opterr) 632 fprintf(stderr, _("%s: option `%s' is ambiguous\n"), 633 argv[0], argv[optind]); 634 nextchar += strlen(nextchar); 635 optind++; 636 optopt = 0; 637 return '?'; 638 } 639 640 if (pfound != NULL) 641 { 642 option_index = indfound; 643 optind++; 644 if (*nameend) 645 { 646 /* Don't test has_arg with >, because some C compilers don't 647 allow it to be used on enums. */ 648 if (pfound->has_arg) 649 optarg = nameend + 1; 650 else 651 { 652 if (opterr) 653 if (argv[optind - 1][1] == '-') 654 /* --option */ 655 fprintf(stderr, 656 _("%s: option `--%s' doesn't allow an argument\n"), 657 argv[0], pfound->name); 658 else 659 /* +option or -option */ 660 fprintf(stderr, 661 _("%s: option `%c%s' doesn't allow an argument\n"), 662 argv[0], argv[optind - 1][0], pfound->name); 663 664 nextchar += strlen(nextchar); 665 666 optopt = pfound->val; 667 return '?'; 668 } 669 } 670 else if (pfound->has_arg == 1) 671 { 672 if (optind < argc) 673 optarg = argv[optind++]; 674 else 675 { 676 if (opterr) 677 fprintf(stderr, 678 _("%s: option `%s' requires an argument\n"), 679 argv[0], argv[optind - 1]); 680 nextchar += strlen(nextchar); 681 optopt = pfound->val; 682 return optstring[0] == ':' ? ':' : '?'; 683 } 684 } 685 nextchar += strlen(nextchar); 686 if (longind != NULL) 687 *longind = option_index; 688 if (pfound->flag) 689 { 690 *(pfound->flag) = pfound->val; 691 return 0; 692 } 693 return pfound->val; 694 } 695 696 /* Can't find it as a long option. If this is not getopt_long_only, 697 or the option starts with '--' or is not a valid short 698 option, then it's an error. 699 Otherwise interpret it as a short option. */ 700 if (!long_only || argv[optind][1] == '-' 701 || my_index(optstring, *nextchar) == NULL) 702 { 703 if (opterr) 704 { 705 if (argv[optind][1] == '-') 706 /* --option */ 707 fprintf(stderr, _("%s: unrecognized option `--%s'\n"), 708 argv[0], nextchar); 709 else 710 /* +option or -option */ 711 fprintf(stderr, _("%s: unrecognized option `%c%s'\n"), 712 argv[0], argv[optind][0], nextchar); 713 } 714 nextchar = (char *) ""; 715 optind++; 716 optopt = 0; 717 return '?'; 718 } 719 } 720 721 /* Look at and handle the next short option-character. */ 722 723 { 724 char c = *nextchar++; 725 char *temp = my_index(optstring, c); 726 727 /* Increment `optind' when we start to process its last character. */ 728 if (*nextchar == '\0') 729 ++optind; 730 731 if (temp == NULL || c == ':') 732 { 733 if (opterr) 734 { 735 if (posixly_correct) 736 /* 1003.2 specifies the format of this message. */ 737 fprintf(stderr, _("%s: illegal option -- %c\n"), 738 argv[0], c); 739 else 740 fprintf(stderr, _("%s: invalid option -- %c\n"), 741 argv[0], c); 742 } 743 optopt = c; 744 return '?'; 745 } 746 /* Convenience. Treat POSIX -W foo same as long option --foo */ 747 if (temp[0] == 'W' && temp[1] == ';') 748 { 749 char *nameend; 750 const struct option *p; 751 const struct option *pfound = NULL; 752 int exact = 0; 753 int ambig = 0; 754 int indfound = 0; 755 int option_index; 756 757 /* This is an option that requires an argument. */ 758 if (*nextchar != '\0') 759 { 760 optarg = nextchar; 761 /* If we end this ARGV-element by taking the rest as an arg, 762 we must advance to the next element now. */ 763 optind++; 764 } 765 else if (optind == argc) 766 { 767 if (opterr) 768 { 769 /* 1003.2 specifies the format of this message. */ 770 fprintf(stderr, _("%s: option requires an argument -- %c\n"), 771 argv[0], c); 772 } 773 optopt = c; 774 if (optstring[0] == ':') 775 c = ':'; 776 else 777 c = '?'; 778 return c; 779 } 780 else 781 /* We already incremented `optind' once; 782 increment it again when taking next ARGV-elt as argument. */ 783 optarg = argv[optind++]; 784 785 /* optarg is now the argument, see if it's in the 786 table of longopts. */ 787 788 for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++) 789 /* Do nothing. */ ; 790 791 /* Test all long options for either exact match 792 or abbreviated matches. */ 793 for (p = longopts, option_index = 0; p->name; p++, option_index++) 794 if (!strncmp(p->name, nextchar, nameend - nextchar)) 795 { 796 if ((unsigned int) (nameend - nextchar) == strlen(p->name)) 797 { 798 /* Exact match found. */ 799 pfound = p; 800 indfound = option_index; 801 exact = 1; 802 break; 803 } 804 else if (pfound == NULL) 805 { 806 /* First nonexact match found. */ 807 pfound = p; 808 indfound = option_index; 809 } 810 else 811 /* Second or later nonexact match found. */ 812 ambig = 1; 813 } 814 if (ambig && !exact) 815 { 816 if (opterr) 817 fprintf(stderr, _("%s: option `-W %s' is ambiguous\n"), 818 argv[0], argv[optind]); 819 nextchar += strlen(nextchar); 820 optind++; 821 return '?'; 822 } 823 if (pfound != NULL) 824 { 825 option_index = indfound; 826 if (*nameend) 827 { 828 /* Don't test has_arg with >, because some C compilers don't 829 allow it to be used on enums. */ 830 if (pfound->has_arg) 831 optarg = nameend + 1; 832 else 833 { 834 if (opterr) 835 fprintf(stderr, _("\ 836 %s: option `-W %s' doesn't allow an argument\n"), 837 argv[0], pfound->name); 838 839 nextchar += strlen(nextchar); 840 return '?'; 841 } 842 } 843 else if (pfound->has_arg == 1) 844 { 845 if (optind < argc) 846 optarg = argv[optind++]; 847 else 848 { 849 if (opterr) 850 fprintf(stderr, 851 _("%s: option `%s' requires an argument\n"), 852 argv[0], argv[optind - 1]); 853 nextchar += strlen(nextchar); 854 return optstring[0] == ':' ? ':' : '?'; 855 } 856 } 857 nextchar += strlen(nextchar); 858 if (longind != NULL) 859 *longind = option_index; 860 if (pfound->flag) 861 { 862 *(pfound->flag) = pfound->val; 863 return 0; 864 } 865 return pfound->val; 866 } 867 nextchar = NULL; 868 return 'W'; /* Let the application handle it. */ 869 } 870 if (temp[1] == ':') 871 { 872 if (temp[2] == ':') 873 { 874 /* This is an option that accepts an argument optionally. */ 875 if (*nextchar != '\0') 876 { 877 optarg = nextchar; 878 optind++; 879 } 880 else 881 optarg = NULL; 882 nextchar = NULL; 883 } 884 else 885 { 886 /* This is an option that requires an argument. */ 887 if (*nextchar != '\0') 888 { 889 optarg = nextchar; 890 /* If we end this ARGV-element by taking the rest as an arg, 891 we must advance to the next element now. */ 892 optind++; 893 } 894 else if (optind == argc) 895 { 896 if (opterr) 897 { 898 /* 1003.2 specifies the format of this message. */ 899 fprintf(stderr, 900 _("%s: option requires an argument -- %c\n"), 901 argv[0], c); 902 } 903 optopt = c; 904 if (optstring[0] == ':') 905 c = ':'; 906 else 907 c = '?'; 908 } 909 else 910 /* We already incremented `optind' once; 911 increment it again when taking next ARGV-elt as argument. */ 912 optarg = argv[optind++]; 913 nextchar = NULL; 914 } 915 } 916 return c; 917 } 918 } 919 920 int getopt(argc,argv,optstring)921 getopt(argc, argv, optstring) 922 int argc; 923 char *const *argv; 924 const char *optstring; 925 { 926 return _getopt_internal(argc, argv, optstring, 927 (const struct option *) 0, 928 (int *) 0, 929 0); 930 } 931 932 #endif /* Not ELIDE_CODE. */ 933 934 #ifdef TEST 935 936 /* Compile with -DTEST to make an executable for use in testing 937 the above definition of `getopt'. */ 938 939 int main(argc,argv)940 main(argc, argv) 941 int argc; 942 char **argv; 943 { 944 int c; 945 int digit_optind = 0; 946 947 while (1) 948 { 949 int this_option_optind = optind ? optind : 1; 950 951 c = getopt(argc, argv, "abc:d:0123456789"); 952 if (c == -1) 953 break; 954 955 switch (c) 956 { 957 case '0': 958 case '1': 959 case '2': 960 case '3': 961 case '4': 962 case '5': 963 case '6': 964 case '7': 965 case '8': 966 case '9': 967 if (digit_optind != 0 && digit_optind != this_option_optind) 968 printf("digits occur in two different argv-elements.\n"); 969 digit_optind = this_option_optind; 970 printf("option %c\n", c); 971 break; 972 973 case 'a': 974 printf("option a\n"); 975 break; 976 977 case 'b': 978 printf("option b\n"); 979 break; 980 981 case 'c': 982 printf("option c with value `%s'\n", optarg); 983 break; 984 985 case '?': 986 break; 987 988 default: 989 printf("?? getopt returned character code 0%o ??\n", c); 990 } 991 } 992 993 if (optind < argc) 994 { 995 printf("non-option ARGV-elements: "); 996 while (optind < argc) 997 printf("%s ", argv[optind++]); 998 printf("\n"); 999 } 1000 1001 exit(0); 1002 } 1003 1004 #endif /* TEST */ 1005