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 [email protected] 4 before changing it! 5 6 Copyright (C) 1987, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 2000 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., 51 Franklin Street, Fifth Floor, 22 Boston, MA 02110-1301, 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 # if defined HAVE_LIBINTL_H || defined _LIBC 82 # include <libintl.h> 83 # ifndef _ 84 # define _(msgid) gettext (msgid) 85 # endif 86 # else 87 # define _(msgid) (msgid) 88 # endif 89 #endif 90 91 /* This version of `getopt' appears to the caller like standard Unix `getopt' 92 but it behaves differently for the user, since it allows the user 93 to intersperse the options with the other arguments. 94 95 As `getopt' works, it permutes the elements of ARGV so that, 96 when it is done, all the options precede everything else. Thus 97 all application programs are extended to handle flexible argument order. 98 99 Setting the environment variable POSIXLY_CORRECT disables permutation. 100 Then the behavior is completely standard. 101 102 GNU application programs can use a third alternative mode in which 103 they can distinguish the relative order of options and other arguments. */ 104 105 #include "getopt.h" 106 107 /* For communication from `getopt' to the caller. 108 When `getopt' finds an option that takes an argument, 109 the argument value is returned here. 110 Also, when `ordering' is RETURN_IN_ORDER, 111 each non-option ARGV-element is returned here. */ 112 113 char *optarg; 114 115 /* Index in ARGV of the next element to be scanned. 116 This is used for communication to and from the caller 117 and for communication between successive calls to `getopt'. 118 119 On entry to `getopt', zero means this is the first call; initialize. 120 121 When `getopt' returns -1, this is the index of the first of the 122 non-option elements that the caller should itself scan. 123 124 Otherwise, `optind' communicates from one call to the next 125 how much of ARGV has been scanned so far. */ 126 127 /* 1003.2 says this must be 1 before any call. */ 128 int optind = 1; 129 130 /* Formerly, initialization of getopt depended on optind==0, which 131 causes problems with re-calling getopt as programs generally don't 132 know that. */ 133 134 int __getopt_initialized; 135 136 /* The next char to be scanned in the option-element 137 in which the last option character we returned was found. 138 This allows us to pick up the scan where we left off. 139 140 If this is zero, or a null string, it means resume the scan 141 by advancing to the next ARGV-element. */ 142 143 static char *nextchar; 144 145 /* Callers store zero here to inhibit the error message 146 for unrecognized options. */ 147 148 int opterr = 1; 149 150 /* Set to an option character which was unrecognized. 151 This must be initialized on some systems to avoid linking in the 152 system's own getopt implementation. */ 153 154 int optopt = '?'; 155 156 /* Describe how to deal with options that follow non-option ARGV-elements. 157 158 If the caller did not specify anything, 159 the default is REQUIRE_ORDER if the environment variable 160 POSIXLY_CORRECT is defined, PERMUTE otherwise. 161 162 REQUIRE_ORDER means don't recognize them as options; 163 stop option processing when the first non-option is seen. 164 This is what Unix does. 165 This mode of operation is selected by either setting the environment 166 variable POSIXLY_CORRECT, or using `+' as the first character 167 of the list of option characters. 168 169 PERMUTE is the default. We permute the contents of ARGV as we scan, 170 so that eventually all the non-options are at the end. This allows options 171 to be given in any order, even with programs that were not written to 172 expect this. 173 174 RETURN_IN_ORDER is an option available to programs that were written 175 to expect options and other ARGV-elements in any order and that care about 176 the ordering of the two. We describe each non-option ARGV-element 177 as if it were the argument of an option with character code 1. 178 Using `-' as the first character of the list of option characters 179 selects this mode of operation. 180 181 The special argument `--' forces an end of option-scanning regardless 182 of the value of `ordering'. In the case of RETURN_IN_ORDER, only 183 `--' can cause `getopt' to return -1 with `optind' != ARGC. */ 184 185 static enum 186 { 187 REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER 188 } ordering; 189 190 /* Value of POSIXLY_CORRECT environment variable. */ 191 static char *posixly_correct; 192 193 #ifdef __GNU_LIBRARY__ 194 /* We want to avoid inclusion of string.h with non-GNU libraries 195 because there are many ways it can cause trouble. 196 On some systems, it contains special magic macros that don't work 197 in GCC. */ 198 # include <string.h> 199 # define my_index strchr 200 #else 201 202 # if HAVE_STRING_H 203 # include <string.h> 204 # else 205 # include <strings.h> 206 # endif 207 208 /* Avoid depending on library functions or files 209 whose names are inconsistent. */ 210 211 #ifndef getenv 212 extern char *getenv (); 213 #endif 214 215 static char * 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__) && !defined strlen 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 # endif /* not __STDC__ */ 239 #endif /* __GNUC__ */ 240 241 #endif /* not __GNU_LIBRARY__ */ 242 243 /* Handle permutation of arguments. */ 244 245 /* Describe the part of ARGV that contains non-options that have 246 been skipped. `first_nonopt' is the index in ARGV of the first of them; 247 `last_nonopt' is the index after the last of them. */ 248 249 static int first_nonopt; 250 static int last_nonopt; 251 252 #ifdef _LIBC 253 /* Bash 2.0 gives us an environment variable containing flags 254 indicating ARGV elements that should not be considered arguments. */ 255 256 /* Defined in getopt_init.c */ 257 extern char *__getopt_nonoption_flags; 258 259 static int nonoption_flags_max_len; 260 static int nonoption_flags_len; 261 262 static int original_argc; 263 static char *const *original_argv; 264 265 /* Make sure the environment variable bash 2.0 puts in the environment 266 is valid for the getopt call we must make sure that the ARGV passed 267 to getopt is that one passed to the process. */ 268 static void 269 __attribute__ ((unused)) 270 store_args_and_env (int argc, char *const *argv) 271 { 272 /* XXX This is no good solution. We should rather copy the args so 273 that we can compare them later. But we must not use malloc(3). */ 274 original_argc = argc; 275 original_argv = argv; 276 } 277 # ifdef text_set_element 278 text_set_element (__libc_subinit, store_args_and_env); 279 # endif /* text_set_element */ 280 281 # define SWAP_FLAGS(ch1, ch2) \ 282 if (nonoption_flags_len > 0) \ 283 { \ 284 char __tmp = __getopt_nonoption_flags[ch1]; \ 285 __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \ 286 __getopt_nonoption_flags[ch2] = __tmp; \ 287 } 288 #else /* !_LIBC */ 289 # define SWAP_FLAGS(ch1, ch2) 290 #endif /* _LIBC */ 291 292 /* Exchange two adjacent subsequences of ARGV. 293 One subsequence is elements [first_nonopt,last_nonopt) 294 which contains all the non-options that have been skipped so far. 295 The other is elements [last_nonopt,optind), which contains all 296 the options processed since those non-options were skipped. 297 298 `first_nonopt' and `last_nonopt' are relocated so that they describe 299 the new indices of the non-options in ARGV after they are moved. */ 300 301 #if defined __STDC__ && __STDC__ 302 static void exchange (char **); 303 #endif 304 305 static void 306 exchange (argv) 307 char **argv; 308 { 309 int bottom = first_nonopt; 310 int middle = last_nonopt; 311 int top = optind; 312 char *tem; 313 314 /* Exchange the shorter segment with the far end of the longer segment. 315 That puts the shorter segment into the right place. 316 It leaves the longer segment in the right place overall, 317 but it consists of two parts that need to be swapped next. */ 318 319 #ifdef _LIBC 320 /* First make sure the handling of the `__getopt_nonoption_flags' 321 string can work normally. Our top argument must be in the range 322 of the string. */ 323 if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len) 324 { 325 /* We must extend the array. The user plays games with us and 326 presents new arguments. */ 327 char *new_str = malloc (top + 1); 328 if (new_str == NULL) 329 nonoption_flags_len = nonoption_flags_max_len = 0; 330 else 331 { 332 memset (__mempcpy (new_str, __getopt_nonoption_flags, 333 nonoption_flags_max_len), 334 '\0', top + 1 - nonoption_flags_max_len); 335 nonoption_flags_max_len = top + 1; 336 __getopt_nonoption_flags = new_str; 337 } 338 } 339 #endif 340 341 while (top > middle && middle > bottom) 342 { 343 if (top - middle > middle - bottom) 344 { 345 /* Bottom segment is the short one. */ 346 int len = middle - bottom; 347 register int i; 348 349 /* Swap it with the top part of the top segment. */ 350 for (i = 0; i < len; i++) 351 { 352 tem = argv[bottom + i]; 353 argv[bottom + i] = argv[top - (middle - bottom) + i]; 354 argv[top - (middle - bottom) + i] = tem; 355 SWAP_FLAGS (bottom + i, top - (middle - bottom) + i); 356 } 357 /* Exclude the moved bottom segment from further swapping. */ 358 top -= len; 359 } 360 else 361 { 362 /* Top segment is the short one. */ 363 int len = top - middle; 364 register int i; 365 366 /* Swap it with the bottom part of the bottom segment. */ 367 for (i = 0; i < len; i++) 368 { 369 tem = argv[bottom + i]; 370 argv[bottom + i] = argv[middle + i]; 371 argv[middle + i] = tem; 372 SWAP_FLAGS (bottom + i, middle + i); 373 } 374 /* Exclude the moved top segment from further swapping. */ 375 bottom += len; 376 } 377 } 378 379 /* Update records for the slots the non-options now occupy. */ 380 381 first_nonopt += (optind - last_nonopt); 382 last_nonopt = optind; 383 } 384 385 /* Initialize the internal data when the first call is made. */ 386 387 #if defined __STDC__ && __STDC__ 388 static const char *_getopt_initialize (int, char *const *, const char *); 389 #endif 390 static const char * 391 _getopt_initialize (argc, argv, optstring) 392 int argc; 393 char *const *argv; 394 const char *optstring; 395 { 396 /* Start processing options with ARGV-element 1 (since ARGV-element 0 397 is the program name); the sequence of previously skipped 398 non-option ARGV-elements is empty. */ 399 400 first_nonopt = last_nonopt = optind; 401 402 nextchar = NULL; 403 404 posixly_correct = getenv ("POSIXLY_CORRECT"); 405 406 /* Determine how to handle the ordering of options and nonoptions. */ 407 408 if (optstring[0] == '-') 409 { 410 ordering = RETURN_IN_ORDER; 411 ++optstring; 412 } 413 else if (optstring[0] == '+') 414 { 415 ordering = REQUIRE_ORDER; 416 ++optstring; 417 } 418 else if (posixly_correct != NULL) 419 ordering = REQUIRE_ORDER; 420 else 421 ordering = PERMUTE; 422 423 #ifdef _LIBC 424 if (posixly_correct == NULL 425 && argc == original_argc && argv == original_argv) 426 { 427 if (nonoption_flags_max_len == 0) 428 { 429 if (__getopt_nonoption_flags == NULL 430 || __getopt_nonoption_flags[0] == '\0') 431 nonoption_flags_max_len = -1; 432 else 433 { 434 const char *orig_str = __getopt_nonoption_flags; 435 int len = nonoption_flags_max_len = strlen (orig_str); 436 if (nonoption_flags_max_len < argc) 437 nonoption_flags_max_len = argc; 438 __getopt_nonoption_flags = 439 (char *) malloc (nonoption_flags_max_len); 440 if (__getopt_nonoption_flags == NULL) 441 nonoption_flags_max_len = -1; 442 else 443 memset (__mempcpy (__getopt_nonoption_flags, orig_str, len), 444 '\0', nonoption_flags_max_len - len); 445 } 446 } 447 nonoption_flags_len = nonoption_flags_max_len; 448 } 449 else 450 nonoption_flags_len = 0; 451 #endif 452 453 return optstring; 454 } 455 456 /* Scan elements of ARGV (whose length is ARGC) for option characters 457 given in OPTSTRING. 458 459 If an element of ARGV starts with '-', and is not exactly "-" or "--", 460 then it is an option element. The characters of this element 461 (aside from the initial '-') are option characters. If `getopt' 462 is called repeatedly, it returns successively each of the option characters 463 from each of the option elements. 464 465 If `getopt' finds another option character, it returns that character, 466 updating `optind' and `nextchar' so that the next call to `getopt' can 467 resume the scan with the following option character or ARGV-element. 468 469 If there are no more option characters, `getopt' returns -1. 470 Then `optind' is the index in ARGV of the first ARGV-element 471 that is not an option. (The ARGV-elements have been permuted 472 so that those that are not options now come last.) 473 474 OPTSTRING is a string containing the legitimate option characters. 475 If an option character is seen that is not listed in OPTSTRING, 476 return '?' after printing an error message. If you set `opterr' to 477 zero, the error message is suppressed but we still return '?'. 478 479 If a char in OPTSTRING is followed by a colon, that means it wants an arg, 480 so the following text in the same ARGV-element, or the text of the following 481 ARGV-element, is returned in `optarg'. Two colons mean an option that 482 wants an optional arg; if there is text in the current ARGV-element, 483 it is returned in `optarg', otherwise `optarg' is set to zero. 484 485 If OPTSTRING starts with `-' or `+', it requests different methods of 486 handling the non-option ARGV-elements. 487 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above. 488 489 Long-named options begin with `--' instead of `-'. 490 Their names may be abbreviated as long as the abbreviation is unique 491 or is an exact match for some defined option. If they have an 492 argument, it follows the option name in the same ARGV-element, separated 493 from the option name by a `=', or else the in next ARGV-element. 494 When `getopt' finds a long-named option, it returns 0 if that option's 495 `flag' field is nonzero, the value of the option's `val' field 496 if the `flag' field is zero. 497 498 The elements of ARGV aren't really const, because we permute them. 499 But we pretend they're const in the prototype to be compatible 500 with other systems. 501 502 LONGOPTS is a vector of `struct option' terminated by an 503 element containing a name which is zero. 504 505 LONGIND returns the index in LONGOPT of the long-named option found. 506 It is only valid when a long-named option has been found by the most 507 recent call. 508 509 If LONG_ONLY is nonzero, '-' as well as '--' can introduce 510 long-named options. */ 511 512 int 513 _getopt_internal (argc, argv, optstring, longopts, longind, long_only) 514 int argc; 515 char *const *argv; 516 const char *optstring; 517 const struct option *longopts; 518 int *longind; 519 int long_only; 520 { 521 int print_errors = opterr; 522 if (optstring[0] == ':') 523 print_errors = 0; 524 525 if (argc < 1) 526 return -1; 527 528 optarg = NULL; 529 530 if (optind == 0 || !__getopt_initialized) 531 { 532 if (optind == 0) 533 optind = 1; /* Don't scan ARGV[0], the program name. */ 534 optstring = _getopt_initialize (argc, argv, optstring); 535 __getopt_initialized = 1; 536 } 537 538 /* Test whether ARGV[optind] points to a non-option argument. 539 Either it does not have option syntax, or there is an environment flag 540 from the shell indicating it is not an option. The later information 541 is only used when the used in the GNU libc. */ 542 #ifdef _LIBC 543 # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \ 544 || (optind < nonoption_flags_len \ 545 && __getopt_nonoption_flags[optind] == '1')) 546 #else 547 # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0') 548 #endif 549 550 if (nextchar == NULL || *nextchar == '\0') 551 { 552 /* Advance to the next ARGV-element. */ 553 554 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been 555 moved back by the user (who may also have changed the arguments). */ 556 if (last_nonopt > optind) 557 last_nonopt = optind; 558 if (first_nonopt > optind) 559 first_nonopt = optind; 560 561 if (ordering == PERMUTE) 562 { 563 /* If we have just processed some options following some non-options, 564 exchange them so that the options come first. */ 565 566 if (first_nonopt != last_nonopt && last_nonopt != optind) 567 exchange ((char **) argv); 568 else if (last_nonopt != optind) 569 first_nonopt = optind; 570 571 /* Skip any additional non-options 572 and extend the range of non-options previously skipped. */ 573 574 while (optind < argc && NONOPTION_P) 575 optind++; 576 last_nonopt = optind; 577 } 578 579 /* The special ARGV-element `--' means premature end of options. 580 Skip it like a null option, 581 then exchange with previous non-options as if it were an option, 582 then skip everything else like a non-option. */ 583 584 if (optind != argc && !strcmp (argv[optind], "--")) 585 { 586 optind++; 587 588 if (first_nonopt != last_nonopt && last_nonopt != optind) 589 exchange ((char **) argv); 590 else if (first_nonopt == last_nonopt) 591 first_nonopt = optind; 592 last_nonopt = argc; 593 594 optind = argc; 595 } 596 597 /* If we have done all the ARGV-elements, stop the scan 598 and back over any non-options that we skipped and permuted. */ 599 600 if (optind == argc) 601 { 602 /* Set the next-arg-index to point at the non-options 603 that we previously skipped, so the caller will digest them. */ 604 if (first_nonopt != last_nonopt) 605 optind = first_nonopt; 606 return -1; 607 } 608 609 /* If we have come to a non-option and did not permute it, 610 either stop the scan or describe it to the caller and pass it by. */ 611 612 if (NONOPTION_P) 613 { 614 if (ordering == REQUIRE_ORDER) 615 return -1; 616 optarg = argv[optind++]; 617 return 1; 618 } 619 620 /* We have found another option-ARGV-element. 621 Skip the initial punctuation. */ 622 623 nextchar = (argv[optind] + 1 624 + (longopts != NULL && argv[optind][1] == '-')); 625 } 626 627 /* Decode the current option-ARGV-element. */ 628 629 /* Check whether the ARGV-element is a long option. 630 631 If long_only and the ARGV-element has the form "-f", where f is 632 a valid short option, don't consider it an abbreviated form of 633 a long option that starts with f. Otherwise there would be no 634 way to give the -f short option. 635 636 On the other hand, if there's a long option "fubar" and 637 the ARGV-element is "-fu", do consider that an abbreviation of 638 the long option, just like "--fu", and not "-f" with arg "u". 639 640 This distinction seems to be the most useful approach. */ 641 642 if (longopts != NULL 643 && (argv[optind][1] == '-' 644 || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1]))))) 645 { 646 char *nameend; 647 const struct option *p; 648 const struct option *pfound = NULL; 649 int exact = 0; 650 int ambig = 0; 651 int indfound = -1; 652 int option_index; 653 654 for (nameend = nextchar; *nameend && *nameend != '='; nameend++) 655 /* Do nothing. */ ; 656 657 /* Test all long options for either exact match 658 or abbreviated matches. */ 659 for (p = longopts, option_index = 0; p->name; p++, option_index++) 660 if (!strncmp (p->name, nextchar, nameend - nextchar)) 661 { 662 if ((unsigned int) (nameend - nextchar) 663 == (unsigned int) strlen (p->name)) 664 { 665 /* Exact match found. */ 666 pfound = p; 667 indfound = option_index; 668 exact = 1; 669 break; 670 } 671 else if (pfound == NULL) 672 { 673 /* First nonexact match found. */ 674 pfound = p; 675 indfound = option_index; 676 } 677 else if (long_only 678 || pfound->has_arg != p->has_arg 679 || pfound->flag != p->flag 680 || pfound->val != p->val) 681 /* Second or later nonexact match found. */ 682 ambig = 1; 683 } 684 685 if (ambig && !exact) 686 { 687 if (print_errors) 688 fprintf (stderr, _("%s: option `%s' is ambiguous\n"), 689 argv[0], argv[optind]); 690 nextchar += strlen (nextchar); 691 optind++; 692 optopt = 0; 693 return '?'; 694 } 695 696 if (pfound != NULL) 697 { 698 option_index = indfound; 699 optind++; 700 if (*nameend) 701 { 702 /* Don't test has_arg with >, because some C compilers don't 703 allow it to be used on enums. */ 704 if (pfound->has_arg) 705 optarg = nameend + 1; 706 else 707 { 708 if (print_errors) 709 { 710 if (argv[optind - 1][1] == '-') 711 /* --option */ 712 fprintf (stderr, 713 _("%s: option `--%s' doesn't allow an argument\n"), 714 argv[0], pfound->name); 715 else 716 /* +option or -option */ 717 fprintf (stderr, 718 _("%s: option `%c%s' doesn't allow an argument\n"), 719 argv[0], argv[optind - 1][0], pfound->name); 720 } 721 722 nextchar += strlen (nextchar); 723 724 optopt = pfound->val; 725 return '?'; 726 } 727 } 728 else if (pfound->has_arg == 1) 729 { 730 if (optind < argc) 731 optarg = argv[optind++]; 732 else 733 { 734 if (print_errors) 735 fprintf (stderr, 736 _("%s: option `%s' requires an argument\n"), 737 argv[0], argv[optind - 1]); 738 nextchar += strlen (nextchar); 739 optopt = pfound->val; 740 return optstring[0] == ':' ? ':' : '?'; 741 } 742 } 743 nextchar += strlen (nextchar); 744 if (longind != NULL) 745 *longind = option_index; 746 if (pfound->flag) 747 { 748 *(pfound->flag) = pfound->val; 749 return 0; 750 } 751 return pfound->val; 752 } 753 754 /* Can't find it as a long option. If this is not getopt_long_only, 755 or the option starts with '--' or is not a valid short 756 option, then it's an error. 757 Otherwise interpret it as a short option. */ 758 if (!long_only || argv[optind][1] == '-' 759 || my_index (optstring, *nextchar) == NULL) 760 { 761 if (print_errors) 762 { 763 if (argv[optind][1] == '-') 764 /* --option */ 765 fprintf (stderr, _("%s: unrecognized option `--%s'\n"), 766 argv[0], nextchar); 767 else 768 /* +option or -option */ 769 fprintf (stderr, _("%s: unrecognized option `%c%s'\n"), 770 argv[0], argv[optind][0], nextchar); 771 } 772 nextchar = (char *) ""; 773 optind++; 774 optopt = 0; 775 return '?'; 776 } 777 } 778 779 /* Look at and handle the next short option-character. */ 780 781 { 782 char c = *nextchar++; 783 char *temp = my_index (optstring, c); 784 785 /* Increment `optind' when we start to process its last character. */ 786 if (*nextchar == '\0') 787 ++optind; 788 789 if (temp == NULL || c == ':') 790 { 791 if (print_errors) 792 { 793 if (posixly_correct) 794 /* 1003.2 specifies the format of this message. */ 795 fprintf (stderr, _("%s: illegal option -- %c\n"), 796 argv[0], c); 797 else 798 fprintf (stderr, _("%s: invalid option -- %c\n"), 799 argv[0], c); 800 } 801 optopt = c; 802 return '?'; 803 } 804 /* Convenience. Treat POSIX -W foo same as long option --foo */ 805 if (temp[0] == 'W' && temp[1] == ';') 806 { 807 char *nameend; 808 const struct option *p; 809 const struct option *pfound = NULL; 810 int exact = 0; 811 int ambig = 0; 812 int indfound = 0; 813 int option_index; 814 815 /* This is an option that requires an argument. */ 816 if (*nextchar != '\0') 817 { 818 optarg = nextchar; 819 /* If we end this ARGV-element by taking the rest as an arg, 820 we must advance to the next element now. */ 821 optind++; 822 } 823 else if (optind == argc) 824 { 825 if (print_errors) 826 { 827 /* 1003.2 specifies the format of this message. */ 828 fprintf (stderr, _("%s: option requires an argument -- %c\n"), 829 argv[0], c); 830 } 831 optopt = c; 832 if (optstring[0] == ':') 833 c = ':'; 834 else 835 c = '?'; 836 return c; 837 } 838 else 839 /* We already incremented `optind' once; 840 increment it again when taking next ARGV-elt as argument. */ 841 optarg = argv[optind++]; 842 843 /* optarg is now the argument, see if it's in the 844 table of longopts. */ 845 846 for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++) 847 /* Do nothing. */ ; 848 849 /* Test all long options for either exact match 850 or abbreviated matches. */ 851 for (p = longopts, option_index = 0; p->name; p++, option_index++) 852 if (!strncmp (p->name, nextchar, nameend - nextchar)) 853 { 854 if ((unsigned int) (nameend - nextchar) == strlen (p->name)) 855 { 856 /* Exact match found. */ 857 pfound = p; 858 indfound = option_index; 859 exact = 1; 860 break; 861 } 862 else if (pfound == NULL) 863 { 864 /* First nonexact match found. */ 865 pfound = p; 866 indfound = option_index; 867 } 868 else 869 /* Second or later nonexact match found. */ 870 ambig = 1; 871 } 872 if (ambig && !exact) 873 { 874 if (print_errors) 875 fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"), 876 argv[0], argv[optind]); 877 nextchar += strlen (nextchar); 878 optind++; 879 return '?'; 880 } 881 if (pfound != NULL) 882 { 883 option_index = indfound; 884 if (*nameend) 885 { 886 /* Don't test has_arg with >, because some C compilers don't 887 allow it to be used on enums. */ 888 if (pfound->has_arg) 889 optarg = nameend + 1; 890 else 891 { 892 if (print_errors) 893 fprintf (stderr, _("%s: option `-W %s' doesn't allow an argument\n"), 894 argv[0], pfound->name); 895 896 nextchar += strlen (nextchar); 897 return '?'; 898 } 899 } 900 else if (pfound->has_arg == 1) 901 { 902 if (optind < argc) 903 optarg = argv[optind++]; 904 else 905 { 906 if (print_errors) 907 fprintf (stderr, 908 _("%s: option `%s' requires an argument\n"), 909 argv[0], argv[optind - 1]); 910 nextchar += strlen (nextchar); 911 return optstring[0] == ':' ? ':' : '?'; 912 } 913 } 914 nextchar += strlen (nextchar); 915 if (longind != NULL) 916 *longind = option_index; 917 if (pfound->flag) 918 { 919 *(pfound->flag) = pfound->val; 920 return 0; 921 } 922 return pfound->val; 923 } 924 nextchar = NULL; 925 return 'W'; /* Let the application handle it. */ 926 } 927 if (temp[1] == ':') 928 { 929 if (temp[2] == ':') 930 { 931 /* This is an option that accepts an argument optionally. */ 932 if (*nextchar != '\0') 933 { 934 optarg = nextchar; 935 optind++; 936 } 937 else 938 optarg = NULL; 939 nextchar = NULL; 940 } 941 else 942 { 943 /* This is an option that requires an argument. */ 944 if (*nextchar != '\0') 945 { 946 optarg = nextchar; 947 /* If we end this ARGV-element by taking the rest as an arg, 948 we must advance to the next element now. */ 949 optind++; 950 } 951 else if (optind == argc) 952 { 953 if (print_errors) 954 { 955 /* 1003.2 specifies the format of this message. */ 956 fprintf (stderr, 957 _("%s: option requires an argument -- %c\n"), 958 argv[0], c); 959 } 960 optopt = c; 961 if (optstring[0] == ':') 962 c = ':'; 963 else 964 c = '?'; 965 } 966 else 967 /* We already incremented `optind' once; 968 increment it again when taking next ARGV-elt as argument. */ 969 optarg = argv[optind++]; 970 nextchar = NULL; 971 } 972 } 973 return c; 974 } 975 } 976 977 int 978 getopt (argc, argv, optstring) 979 int argc; 980 char *const *argv; 981 const char *optstring; 982 { 983 return _getopt_internal (argc, argv, optstring, 984 (const struct option *) 0, 985 (int *) 0, 986 0); 987 } 988 989 #endif /* Not ELIDE_CODE. */ 990 991 #ifdef TEST 992 993 /* Compile with -DTEST to make an executable for use in testing 994 the above definition of `getopt'. */ 995 996 int 997 main (argc, argv) 998 int argc; 999 char **argv; 1000 { 1001 int c; 1002 int digit_optind = 0; 1003 1004 while (1) 1005 { 1006 int this_option_optind = optind ? optind : 1; 1007 1008 c = getopt (argc, argv, "abc:d:0123456789"); 1009 if (c == -1) 1010 break; 1011 1012 switch (c) 1013 { 1014 case '0': 1015 case '1': 1016 case '2': 1017 case '3': 1018 case '4': 1019 case '5': 1020 case '6': 1021 case '7': 1022 case '8': 1023 case '9': 1024 if (digit_optind != 0 && digit_optind != this_option_optind) 1025 printf ("digits occur in two different argv-elements.\n"); 1026 digit_optind = this_option_optind; 1027 printf ("option %c\n", c); 1028 break; 1029 1030 case 'a': 1031 printf ("option a\n"); 1032 break; 1033 1034 case 'b': 1035 printf ("option b\n"); 1036 break; 1037 1038 case 'c': 1039 printf ("option c with value `%s'\n", optarg); 1040 break; 1041 1042 case '?': 1043 break; 1044 1045 default: 1046 printf ("?? getopt returned character code 0%o ??\n", c); 1047 } 1048 } 1049 1050 if (optind < argc) 1051 { 1052 printf ("non-option ARGV-elements: "); 1053 while (optind < argc) 1054 printf ("%s ", argv[optind++]); 1055 printf ("\n"); 1056 } 1057 1058 exit (0); 1059 } 1060 1061 #endif /* TEST */ 1062