1 /* Getopt for GNU. 2 NOTE: getopt is now part of the C library, so if you don't know what 3 "Keep this file name-space clean" means, talk to drepper@gnu.org 4 before changing it! 5 6 Copyright (C) 1987-2020 Free Software Foundation, Inc. 7 8 NOTE: This source is derived from an old version taken from the GNU C 9 Library (glibc). 10 11 This program is free software; you can redistribute it and/or modify it 12 under the terms of the GNU General Public License as published by the 13 Free Software Foundation; either version 2, or (at your option) any 14 later version. 15 16 This program is distributed in the hope that it will be useful, 17 but WITHOUT ANY WARRANTY; without even the implied warranty of 18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 GNU General Public License for more details. 20 21 You should have received a copy of the GNU General Public License 22 along with this program; if not, write to the Free Software 23 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, 24 USA. */ 25 26 /* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>. 27 Ditto for AIX 3.2 and <stdlib.h>. */ 28 #ifndef _NO_PROTO 29 # define _NO_PROTO 30 #endif 31 32 #ifdef HAVE_CONFIG_H 33 # include <config.h> 34 #endif 35 36 #if !defined __STDC__ || !__STDC__ 37 /* This is a separate conditional since some stdc systems 38 reject `defined (const)'. */ 39 # ifndef const 40 # define const 41 # endif 42 #endif 43 44 #include "ansidecl.h" 45 #include <stdio.h> 46 47 /* Comment out all this code if we are using the GNU C Library, and are not 48 actually compiling the library itself. This code is part of the GNU C 49 Library, but also included in many other GNU distributions. Compiling 50 and linking in this code is a waste when using the GNU C library 51 (especially if it is a shared library). Rather than having every GNU 52 program understand `configure --with-gnu-libc' and omit the object files, 53 it is simpler to just do this in the source for each such file. */ 54 55 #define GETOPT_INTERFACE_VERSION 2 56 #if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2 57 # include <gnu-versions.h> 58 # if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION 59 # define ELIDE_CODE 60 # endif 61 #endif 62 63 #ifndef ELIDE_CODE 64 65 66 /* This needs to come after some library #include 67 to get __GNU_LIBRARY__ defined. */ 68 #ifdef __GNU_LIBRARY__ 69 /* Don't include stdlib.h for non-GNU C libraries because some of them 70 contain conflicting prototypes for getopt. */ 71 # include <stdlib.h> 72 # include <unistd.h> 73 #endif /* GNU C library. */ 74 75 #ifdef VMS 76 # include <unixlib.h> 77 # if HAVE_STRING_H - 0 78 # include <string.h> 79 # endif 80 #endif 81 82 #ifndef _ 83 /* This is for other GNU distributions with internationalized messages. 84 When compiling libc, the _ macro is predefined. */ 85 # if (HAVE_LIBINTL_H && ENABLE_NLS) || defined _LIBC 86 # include <libintl.h> 87 # define _(msgid) gettext (msgid) 88 # else 89 # define _(msgid) (msgid) 90 # endif 91 #endif 92 93 /* This version of `getopt' appears to the caller like standard Unix `getopt' 94 but it behaves differently for the user, since it allows the user 95 to intersperse the options with the other arguments. 96 97 As `getopt' works, it permutes the elements of ARGV so that, 98 when it is done, all the options precede everything else. Thus 99 all application programs are extended to handle flexible argument order. 100 101 Setting the environment variable POSIXLY_CORRECT disables permutation. 102 Then the behavior is completely standard. 103 104 GNU application programs can use a third alternative mode in which 105 they can distinguish the relative order of options and other arguments. */ 106 107 #include "getopt.h" 108 109 /* For communication from `getopt' to the caller. 110 When `getopt' finds an option that takes an argument, 111 the argument value is returned here. 112 Also, when `ordering' is RETURN_IN_ORDER, 113 each non-option ARGV-element is returned here. */ 114 115 char *optarg = NULL; 116 117 /* Index in ARGV of the next element to be scanned. 118 This is used for communication to and from the caller 119 and for communication between successive calls to `getopt'. 120 121 On entry to `getopt', zero means this is the first call; initialize. 122 123 When `getopt' returns -1, this is the index of the first of the 124 non-option elements that the caller should itself scan. 125 126 Otherwise, `optind' communicates from one call to the next 127 how much of ARGV has been scanned so far. */ 128 129 /* 1003.2 says this must be 1 before any call. */ 130 int optind = 1; 131 132 /* Formerly, initialization of getopt depended on optind==0, which 133 causes problems with re-calling getopt as programs generally don't 134 know that. */ 135 136 int __getopt_initialized = 0; 137 138 /* The next char to be scanned in the option-element 139 in which the last option character we returned was found. 140 This allows us to pick up the scan where we left off. 141 142 If this is zero, or a null string, it means resume the scan 143 by advancing to the next ARGV-element. */ 144 145 static char *nextchar; 146 147 /* Callers store zero here to inhibit the error message 148 for unrecognized options. */ 149 150 int opterr = 1; 151 152 /* Set to an option character which was unrecognized. 153 This must be initialized on some systems to avoid linking in the 154 system's own getopt implementation. */ 155 156 int optopt = '?'; 157 158 /* Describe how to deal with options that follow non-option ARGV-elements. 159 160 If the caller did not specify anything, 161 the default is REQUIRE_ORDER if the environment variable 162 POSIXLY_CORRECT is defined, PERMUTE otherwise. 163 164 REQUIRE_ORDER means don't recognize them as options; 165 stop option processing when the first non-option is seen. 166 This is what Unix does. 167 This mode of operation is selected by either setting the environment 168 variable POSIXLY_CORRECT, or using `+' as the first character 169 of the list of option characters. 170 171 PERMUTE is the default. We permute the contents of ARGV as we scan, 172 so that eventually all the non-options are at the end. This allows options 173 to be given in any order, even with programs that were not written to 174 expect this. 175 176 RETURN_IN_ORDER is an option available to programs that were written 177 to expect options and other ARGV-elements in any order and that care about 178 the ordering of the two. We describe each non-option ARGV-element 179 as if it were the argument of an option with character code 1. 180 Using `-' as the first character of the list of option characters 181 selects this mode of operation. 182 183 The special argument `--' forces an end of option-scanning regardless 184 of the value of `ordering'. In the case of RETURN_IN_ORDER, only 185 `--' can cause `getopt' to return -1 with `optind' != ARGC. */ 186 187 static enum 188 { 189 REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER 190 } ordering; 191 192 /* Value of POSIXLY_CORRECT environment variable. */ 193 static char *posixly_correct; 194 195 #ifdef __GNU_LIBRARY__ 196 /* We want to avoid inclusion of string.h with non-GNU libraries 197 because there are many ways it can cause trouble. 198 On some systems, it contains special magic macros that don't work 199 in GCC. */ 200 # include <string.h> 201 # define my_index strchr 202 #else 203 204 # if HAVE_STRING_H 205 # include <string.h> 206 # else 207 # if HAVE_STRINGS_H 208 # include <strings.h> 209 # endif 210 # endif 211 212 /* Avoid depending on library functions or files 213 whose names are inconsistent. */ 214 215 #if HAVE_STDLIB_H && HAVE_DECL_GETENV 216 # include <stdlib.h> 217 #elif !defined(getenv) 218 # ifdef __cplusplus 219 extern "C" { 220 # endif /* __cplusplus */ 221 extern char *getenv (const char *); 222 # ifdef __cplusplus 223 } 224 # endif /* __cplusplus */ 225 #endif 226 227 static char * 228 my_index (const char *str, int chr) 229 { 230 while (*str) 231 { 232 if (*str == chr) 233 return (char *) str; 234 str++; 235 } 236 return 0; 237 } 238 239 /* If using GCC, we can safely declare strlen this way. 240 If not using GCC, it is ok not to declare it. */ 241 #ifdef __GNUC__ 242 /* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h. 243 That was relevant to code that was here before. */ 244 # if (!defined __STDC__ || !__STDC__) && !defined strlen 245 /* gcc with -traditional declares the built-in strlen to return int, 246 and has done so at least since version 2.4.5. -- rms. */ 247 extern int strlen (const char *); 248 # endif /* not __STDC__ */ 249 #endif /* __GNUC__ */ 250 251 #endif /* not __GNU_LIBRARY__ */ 252 253 /* Handle permutation of arguments. */ 254 255 /* Describe the part of ARGV that contains non-options that have 256 been skipped. `first_nonopt' is the index in ARGV of the first of them; 257 `last_nonopt' is the index after the last of them. */ 258 259 static int first_nonopt; 260 static int last_nonopt; 261 262 #ifdef _LIBC 263 /* Bash 2.0 gives us an environment variable containing flags 264 indicating ARGV elements that should not be considered arguments. */ 265 266 /* Defined in getopt_init.c */ 267 extern char *__getopt_nonoption_flags; 268 269 static int nonoption_flags_max_len; 270 static int nonoption_flags_len; 271 272 static int original_argc; 273 static char *const *original_argv; 274 275 /* Make sure the environment variable bash 2.0 puts in the environment 276 is valid for the getopt call we must make sure that the ARGV passed 277 to getopt is that one passed to the process. */ 278 static void 279 __attribute__ ((unused)) 280 store_args_and_env (int argc, char *const *argv) 281 { 282 /* XXX This is no good solution. We should rather copy the args so 283 that we can compare them later. But we must not use malloc(3). */ 284 original_argc = argc; 285 original_argv = argv; 286 } 287 # ifdef text_set_element 288 text_set_element (__libc_subinit, store_args_and_env); 289 # endif /* text_set_element */ 290 291 # define SWAP_FLAGS(ch1, ch2) \ 292 if (nonoption_flags_len > 0) \ 293 { \ 294 char __tmp = __getopt_nonoption_flags[ch1]; \ 295 __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \ 296 __getopt_nonoption_flags[ch2] = __tmp; \ 297 } 298 #else /* !_LIBC */ 299 # define SWAP_FLAGS(ch1, ch2) 300 #endif /* _LIBC */ 301 302 /* Exchange two adjacent subsequences of ARGV. 303 One subsequence is elements [first_nonopt,last_nonopt) 304 which contains all the non-options that have been skipped so far. 305 The other is elements [last_nonopt,optind), which contains all 306 the options processed since those non-options were skipped. 307 308 `first_nonopt' and `last_nonopt' are relocated so that they describe 309 the new indices of the non-options in ARGV after they are moved. */ 310 311 #if defined __STDC__ && __STDC__ 312 static void exchange (char **); 313 #endif 314 315 static void 316 exchange (char **argv) 317 { 318 int bottom = first_nonopt; 319 int middle = last_nonopt; 320 int top = optind; 321 char *tem; 322 323 /* Exchange the shorter segment with the far end of the longer segment. 324 That puts the shorter segment into the right place. 325 It leaves the longer segment in the right place overall, 326 but it consists of two parts that need to be swapped next. */ 327 328 #ifdef _LIBC 329 /* First make sure the handling of the `__getopt_nonoption_flags' 330 string can work normally. Our top argument must be in the range 331 of the string. */ 332 if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len) 333 { 334 /* We must extend the array. The user plays games with us and 335 presents new arguments. */ 336 char *new_str = (char *) malloc (top + 1); 337 if (new_str == NULL) 338 nonoption_flags_len = nonoption_flags_max_len = 0; 339 else 340 { 341 memset (mempcpy (new_str, __getopt_nonoption_flags, 342 nonoption_flags_max_len), 343 '\0', top + 1 - nonoption_flags_max_len); 344 nonoption_flags_max_len = top + 1; 345 __getopt_nonoption_flags = new_str; 346 } 347 } 348 #endif 349 350 while (top > middle && middle > bottom) 351 { 352 if (top - middle > middle - bottom) 353 { 354 /* Bottom segment is the short one. */ 355 int len = middle - bottom; 356 register int i; 357 358 /* Swap it with the top part of the top segment. */ 359 for (i = 0; i < len; i++) 360 { 361 tem = argv[bottom + i]; 362 argv[bottom + i] = argv[top - (middle - bottom) + i]; 363 argv[top - (middle - bottom) + i] = tem; 364 SWAP_FLAGS (bottom + i, top - (middle - bottom) + i); 365 } 366 /* Exclude the moved bottom segment from further swapping. */ 367 top -= len; 368 } 369 else 370 { 371 /* Top segment is the short one. */ 372 int len = top - middle; 373 register int i; 374 375 /* Swap it with the bottom part of the bottom segment. */ 376 for (i = 0; i < len; i++) 377 { 378 tem = argv[bottom + i]; 379 argv[bottom + i] = argv[middle + i]; 380 argv[middle + i] = tem; 381 SWAP_FLAGS (bottom + i, middle + i); 382 } 383 /* Exclude the moved top segment from further swapping. */ 384 bottom += len; 385 } 386 } 387 388 /* Update records for the slots the non-options now occupy. */ 389 390 first_nonopt += (optind - last_nonopt); 391 last_nonopt = optind; 392 } 393 394 /* Initialize the internal data when the first call is made. */ 395 396 #if defined __STDC__ && __STDC__ 397 static const char *_getopt_initialize (int, char *const *, const char *); 398 #endif 399 static const char * 400 _getopt_initialize (int argc ATTRIBUTE_UNUSED, 401 char *const *argv ATTRIBUTE_UNUSED, 402 const char *optstring) 403 { 404 /* Start processing options with ARGV-element 1 (since ARGV-element 0 405 is the program name); the sequence of previously skipped 406 non-option ARGV-elements is empty. */ 407 408 first_nonopt = last_nonopt = optind; 409 410 nextchar = NULL; 411 412 posixly_correct = getenv ("POSIXLY_CORRECT"); 413 414 /* Determine how to handle the ordering of options and nonoptions. */ 415 416 if (optstring[0] == '-') 417 { 418 ordering = RETURN_IN_ORDER; 419 ++optstring; 420 } 421 else if (optstring[0] == '+') 422 { 423 ordering = REQUIRE_ORDER; 424 ++optstring; 425 } 426 else if (posixly_correct != NULL) 427 ordering = REQUIRE_ORDER; 428 else 429 ordering = PERMUTE; 430 431 #ifdef _LIBC 432 if (posixly_correct == NULL 433 && argc == original_argc && argv == original_argv) 434 { 435 if (nonoption_flags_max_len == 0) 436 { 437 if (__getopt_nonoption_flags == NULL 438 || __getopt_nonoption_flags[0] == '\0') 439 nonoption_flags_max_len = -1; 440 else 441 { 442 const char *orig_str = __getopt_nonoption_flags; 443 int len = nonoption_flags_max_len = strlen (orig_str); 444 if (nonoption_flags_max_len < argc) 445 nonoption_flags_max_len = argc; 446 __getopt_nonoption_flags = 447 (char *) malloc (nonoption_flags_max_len); 448 if (__getopt_nonoption_flags == NULL) 449 nonoption_flags_max_len = -1; 450 else 451 memset (mempcpy (__getopt_nonoption_flags, orig_str, len), 452 '\0', nonoption_flags_max_len - len); 453 } 454 } 455 nonoption_flags_len = nonoption_flags_max_len; 456 } 457 else 458 nonoption_flags_len = 0; 459 #endif 460 461 return optstring; 462 } 463 464 /* Scan elements of ARGV (whose length is ARGC) for option characters 465 given in OPTSTRING. 466 467 If an element of ARGV starts with '-', and is not exactly "-" or "--", 468 then it is an option element. The characters of this element 469 (aside from the initial '-') are option characters. If `getopt' 470 is called repeatedly, it returns successively each of the option characters 471 from each of the option elements. 472 473 If `getopt' finds another option character, it returns that character, 474 updating `optind' and `nextchar' so that the next call to `getopt' can 475 resume the scan with the following option character or ARGV-element. 476 477 If there are no more option characters, `getopt' returns -1. 478 Then `optind' is the index in ARGV of the first ARGV-element 479 that is not an option. (The ARGV-elements have been permuted 480 so that those that are not options now come last.) 481 482 OPTSTRING is a string containing the legitimate option characters. 483 If an option character is seen that is not listed in OPTSTRING, 484 return '?' after printing an error message. If you set `opterr' to 485 zero, the error message is suppressed but we still return '?'. 486 487 If a char in OPTSTRING is followed by a colon, that means it wants an arg, 488 so the following text in the same ARGV-element, or the text of the following 489 ARGV-element, is returned in `optarg'. Two colons mean an option that 490 wants an optional arg; if there is text in the current ARGV-element, 491 it is returned in `optarg', otherwise `optarg' is set to zero. 492 493 If OPTSTRING starts with `-' or `+', it requests different methods of 494 handling the non-option ARGV-elements. 495 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above. 496 497 Long-named options begin with `--' instead of `-'. 498 Their names may be abbreviated as long as the abbreviation is unique 499 or is an exact match for some defined option. If they have an 500 argument, it follows the option name in the same ARGV-element, separated 501 from the option name by a `=', or else the in next ARGV-element. 502 When `getopt' finds a long-named option, it returns 0 if that option's 503 `flag' field is nonzero, the value of the option's `val' field 504 if the `flag' field is zero. 505 506 The elements of ARGV aren't really const, because we permute them. 507 But we pretend they're const in the prototype to be compatible 508 with other systems. 509 510 LONGOPTS is a vector of `struct option' terminated by an 511 element containing a name which is zero. 512 513 LONGIND returns the index in LONGOPT of the long-named option found. 514 It is only valid when a long-named option has been found by the most 515 recent call. 516 517 If LONG_ONLY is nonzero, '-' as well as '--' can introduce 518 long-named options. */ 519 520 int 521 _getopt_internal (int argc, char *const *argv, const char *optstring, 522 const struct option *longopts, 523 int *longind, int long_only) 524 { 525 optarg = NULL; 526 527 if (optind == 0 || !__getopt_initialized) 528 { 529 if (optind == 0) 530 optind = 1; /* Don't scan ARGV[0], the program name. */ 531 optstring = _getopt_initialize (argc, argv, optstring); 532 __getopt_initialized = 1; 533 } 534 535 /* Test whether ARGV[optind] points to a non-option argument. 536 Either it does not have option syntax, or there is an environment flag 537 from the shell indicating it is not an option. The later information 538 is only used when the used in the GNU libc. */ 539 #ifdef _LIBC 540 # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \ 541 || (optind < nonoption_flags_len \ 542 && __getopt_nonoption_flags[optind] == '1')) 543 #else 544 # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0') 545 #endif 546 547 if (nextchar == NULL || *nextchar == '\0') 548 { 549 /* Advance to the next ARGV-element. */ 550 551 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been 552 moved back by the user (who may also have changed the arguments). */ 553 if (last_nonopt > optind) 554 last_nonopt = optind; 555 if (first_nonopt > optind) 556 first_nonopt = optind; 557 558 if (ordering == PERMUTE) 559 { 560 /* If we have just processed some options following some non-options, 561 exchange them so that the options come first. */ 562 563 if (first_nonopt != last_nonopt && last_nonopt != optind) 564 exchange ((char **) argv); 565 else if (last_nonopt != optind) 566 first_nonopt = optind; 567 568 /* Skip any additional non-options 569 and extend the range of non-options previously skipped. */ 570 571 while (optind < argc && NONOPTION_P) 572 optind++; 573 last_nonopt = optind; 574 } 575 576 /* The special ARGV-element `--' means premature end of options. 577 Skip it like a null option, 578 then exchange with previous non-options as if it were an option, 579 then skip everything else like a non-option. */ 580 581 if (optind != argc && !strcmp (argv[optind], "--")) 582 { 583 optind++; 584 585 if (first_nonopt != last_nonopt && last_nonopt != optind) 586 exchange ((char **) argv); 587 else if (first_nonopt == last_nonopt) 588 first_nonopt = optind; 589 last_nonopt = argc; 590 591 optind = argc; 592 } 593 594 /* If we have done all the ARGV-elements, stop the scan 595 and back over any non-options that we skipped and permuted. */ 596 597 if (optind == argc) 598 { 599 /* Set the next-arg-index to point at the non-options 600 that we previously skipped, so the caller will digest them. */ 601 if (first_nonopt != last_nonopt) 602 optind = first_nonopt; 603 return -1; 604 } 605 606 /* If we have come to a non-option and did not permute it, 607 either stop the scan or describe it to the caller and pass it by. */ 608 609 if (NONOPTION_P) 610 { 611 if (ordering == REQUIRE_ORDER) 612 return -1; 613 optarg = argv[optind++]; 614 return 1; 615 } 616 617 /* We have found another option-ARGV-element. 618 Skip the initial punctuation. */ 619 620 nextchar = (argv[optind] + 1 621 + (longopts != NULL && argv[optind][1] == '-')); 622 } 623 624 /* Decode the current option-ARGV-element. */ 625 626 /* Check whether the ARGV-element is a long option. 627 628 If long_only and the ARGV-element has the form "-f", where f is 629 a valid short option, don't consider it an abbreviated form of 630 a long option that starts with f. Otherwise there would be no 631 way to give the -f short option. 632 633 On the other hand, if there's a long option "fubar" and 634 the ARGV-element is "-fu", do consider that an abbreviation of 635 the long option, just like "--fu", and not "-f" with arg "u". 636 637 This distinction seems to be the most useful approach. */ 638 639 if (longopts != NULL 640 && (argv[optind][1] == '-' 641 || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1]))))) 642 { 643 char *nameend; 644 const struct option *p; 645 const struct option *pfound = NULL; 646 int exact = 0; 647 int ambig = 0; 648 int indfound = -1; 649 int option_index; 650 651 for (nameend = nextchar; *nameend && *nameend != '='; nameend++) 652 /* Do nothing. */ ; 653 654 /* Test all long options for either exact match 655 or abbreviated matches. */ 656 for (p = longopts, option_index = 0; p->name; p++, option_index++) 657 if (!strncmp (p->name, nextchar, nameend - nextchar)) 658 { 659 if ((unsigned int) (nameend - nextchar) 660 == (unsigned int) strlen (p->name)) 661 { 662 /* Exact match found. */ 663 pfound = p; 664 indfound = option_index; 665 exact = 1; 666 break; 667 } 668 else if (pfound == NULL) 669 { 670 /* First nonexact match found. */ 671 pfound = p; 672 indfound = option_index; 673 } 674 else 675 /* Second or later nonexact match found. */ 676 ambig = 1; 677 } 678 679 if (ambig && !exact) 680 { 681 if (opterr) 682 fprintf (stderr, _("%s: option `%s' is ambiguous\n"), 683 argv[0], argv[optind]); 684 nextchar += strlen (nextchar); 685 optind++; 686 optopt = 0; 687 return '?'; 688 } 689 690 if (pfound != NULL) 691 { 692 option_index = indfound; 693 optind++; 694 if (*nameend) 695 { 696 /* Don't test has_arg with >, because some C compilers don't 697 allow it to be used on enums. */ 698 if (pfound->has_arg) 699 optarg = nameend + 1; 700 else 701 { 702 if (opterr) 703 { 704 if (argv[optind - 1][1] == '-') 705 /* --option */ 706 fprintf (stderr, 707 _("%s: option `--%s' doesn't allow an argument\n"), 708 argv[0], pfound->name); 709 else 710 /* +option or -option */ 711 fprintf (stderr, 712 _("%s: option `%c%s' doesn't allow an argument\n"), 713 argv[0], argv[optind - 1][0], pfound->name); 714 715 nextchar += strlen (nextchar); 716 717 optopt = pfound->val; 718 return '?'; 719 } 720 } 721 } 722 else if (pfound->has_arg == 1) 723 { 724 if (optind < argc) 725 optarg = argv[optind++]; 726 else 727 { 728 if (opterr) 729 fprintf (stderr, 730 _("%s: option `%s' requires an argument\n"), 731 argv[0], argv[optind - 1]); 732 nextchar += strlen (nextchar); 733 optopt = pfound->val; 734 return optstring[0] == ':' ? ':' : '?'; 735 } 736 } 737 nextchar += strlen (nextchar); 738 if (longind != NULL) 739 *longind = option_index; 740 if (pfound->flag) 741 { 742 *(pfound->flag) = pfound->val; 743 return 0; 744 } 745 return pfound->val; 746 } 747 748 /* Can't find it as a long option. If this is not getopt_long_only, 749 or the option starts with '--' or is not a valid short 750 option, then it's an error. 751 Otherwise interpret it as a short option. */ 752 if (!long_only || argv[optind][1] == '-' 753 || my_index (optstring, *nextchar) == NULL) 754 { 755 if (opterr) 756 { 757 if (argv[optind][1] == '-') 758 /* --option */ 759 fprintf (stderr, _("%s: unrecognized option `--%s'\n"), 760 argv[0], nextchar); 761 else 762 /* +option or -option */ 763 fprintf (stderr, _("%s: unrecognized option `%c%s'\n"), 764 argv[0], argv[optind][0], nextchar); 765 } 766 nextchar = (char *) ""; 767 optind++; 768 optopt = 0; 769 return '?'; 770 } 771 } 772 773 /* Look at and handle the next short option-character. */ 774 775 { 776 char c = *nextchar++; 777 char *temp = my_index (optstring, c); 778 779 /* Increment `optind' when we start to process its last character. */ 780 if (*nextchar == '\0') 781 ++optind; 782 783 if (temp == NULL || c == ':') 784 { 785 if (opterr) 786 { 787 if (posixly_correct) 788 /* 1003.2 specifies the format of this message. */ 789 fprintf (stderr, _("%s: illegal option -- %c\n"), 790 argv[0], c); 791 else 792 fprintf (stderr, _("%s: invalid option -- %c\n"), 793 argv[0], c); 794 } 795 optopt = c; 796 return '?'; 797 } 798 /* Convenience. Treat POSIX -W foo same as long option --foo */ 799 if (temp[0] == 'W' && temp[1] == ';') 800 { 801 char *nameend; 802 const struct option *p; 803 const struct option *pfound = NULL; 804 int exact = 0; 805 int ambig = 0; 806 int indfound = 0; 807 int option_index; 808 809 /* This is an option that requires an argument. */ 810 if (*nextchar != '\0') 811 { 812 optarg = nextchar; 813 /* If we end this ARGV-element by taking the rest as an arg, 814 we must advance to the next element now. */ 815 optind++; 816 } 817 else if (optind == argc) 818 { 819 if (opterr) 820 { 821 /* 1003.2 specifies the format of this message. */ 822 fprintf (stderr, _("%s: option requires an argument -- %c\n"), 823 argv[0], c); 824 } 825 optopt = c; 826 if (optstring[0] == ':') 827 c = ':'; 828 else 829 c = '?'; 830 return c; 831 } 832 else 833 /* We already incremented `optind' once; 834 increment it again when taking next ARGV-elt as argument. */ 835 optarg = argv[optind++]; 836 837 /* optarg is now the argument, see if it's in the 838 table of longopts. */ 839 840 for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++) 841 /* Do nothing. */ ; 842 843 /* Test all long options for either exact match 844 or abbreviated matches. */ 845 for (p = longopts, option_index = 0; p->name; p++, option_index++) 846 if (!strncmp (p->name, nextchar, nameend - nextchar)) 847 { 848 if ((unsigned int) (nameend - nextchar) == strlen (p->name)) 849 { 850 /* Exact match found. */ 851 pfound = p; 852 indfound = option_index; 853 exact = 1; 854 break; 855 } 856 else if (pfound == NULL) 857 { 858 /* First nonexact match found. */ 859 pfound = p; 860 indfound = option_index; 861 } 862 else 863 /* Second or later nonexact match found. */ 864 ambig = 1; 865 } 866 if (ambig && !exact) 867 { 868 if (opterr) 869 fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"), 870 argv[0], argv[optind]); 871 nextchar += strlen (nextchar); 872 optind++; 873 return '?'; 874 } 875 if (pfound != NULL) 876 { 877 option_index = indfound; 878 if (*nameend) 879 { 880 /* Don't test has_arg with >, because some C compilers don't 881 allow it to be used on enums. */ 882 if (pfound->has_arg) 883 optarg = nameend + 1; 884 else 885 { 886 if (opterr) 887 fprintf (stderr, _("\ 888 %s: option `-W %s' doesn't allow an argument\n"), 889 argv[0], pfound->name); 890 891 nextchar += strlen (nextchar); 892 return '?'; 893 } 894 } 895 else if (pfound->has_arg == 1) 896 { 897 if (optind < argc) 898 optarg = argv[optind++]; 899 else 900 { 901 if (opterr) 902 fprintf (stderr, 903 _("%s: option `%s' requires an argument\n"), 904 argv[0], argv[optind - 1]); 905 nextchar += strlen (nextchar); 906 return optstring[0] == ':' ? ':' : '?'; 907 } 908 } 909 nextchar += strlen (nextchar); 910 if (longind != NULL) 911 *longind = option_index; 912 if (pfound->flag) 913 { 914 *(pfound->flag) = pfound->val; 915 return 0; 916 } 917 return pfound->val; 918 } 919 nextchar = NULL; 920 return 'W'; /* Let the application handle it. */ 921 } 922 if (temp[1] == ':') 923 { 924 if (temp[2] == ':') 925 { 926 /* This is an option that accepts an argument optionally. */ 927 if (*nextchar != '\0') 928 { 929 optarg = nextchar; 930 optind++; 931 } 932 else 933 optarg = NULL; 934 nextchar = NULL; 935 } 936 else 937 { 938 /* This is an option that requires an argument. */ 939 if (*nextchar != '\0') 940 { 941 optarg = nextchar; 942 /* If we end this ARGV-element by taking the rest as an arg, 943 we must advance to the next element now. */ 944 optind++; 945 } 946 else if (optind == argc) 947 { 948 if (opterr) 949 { 950 /* 1003.2 specifies the format of this message. */ 951 fprintf (stderr, 952 _("%s: option requires an argument -- %c\n"), 953 argv[0], c); 954 } 955 optopt = c; 956 if (optstring[0] == ':') 957 c = ':'; 958 else 959 c = '?'; 960 } 961 else 962 /* We already incremented `optind' once; 963 increment it again when taking next ARGV-elt as argument. */ 964 optarg = argv[optind++]; 965 nextchar = NULL; 966 } 967 } 968 return c; 969 } 970 } 971 972 int 973 getopt (int argc, char *const *argv, const char *optstring) 974 { 975 return _getopt_internal (argc, argv, optstring, 976 (const struct option *) 0, 977 (int *) 0, 978 0); 979 } 980 981 #endif /* Not ELIDE_CODE. */ 982 983 #ifdef TEST 984 985 /* Compile with -DTEST to make an executable for use in testing 986 the above definition of `getopt'. */ 987 988 int 989 main (int argc, char **argv) 990 { 991 int c; 992 int digit_optind = 0; 993 994 while (1) 995 { 996 int this_option_optind = optind ? optind : 1; 997 998 c = getopt (argc, argv, "abc:d:0123456789"); 999 if (c == -1) 1000 break; 1001 1002 switch (c) 1003 { 1004 case '0': 1005 case '1': 1006 case '2': 1007 case '3': 1008 case '4': 1009 case '5': 1010 case '6': 1011 case '7': 1012 case '8': 1013 case '9': 1014 if (digit_optind != 0 && digit_optind != this_option_optind) 1015 printf ("digits occur in two different argv-elements.\n"); 1016 digit_optind = this_option_optind; 1017 printf ("option %c\n", c); 1018 break; 1019 1020 case 'a': 1021 printf ("option a\n"); 1022 break; 1023 1024 case 'b': 1025 printf ("option b\n"); 1026 break; 1027 1028 case 'c': 1029 printf ("option c with value `%s'\n", optarg); 1030 break; 1031 1032 case '?': 1033 break; 1034 1035 default: 1036 printf ("?? getopt returned character code 0%o ??\n", c); 1037 } 1038 } 1039 1040 if (optind < argc) 1041 { 1042 printf ("non-option ARGV-elements: "); 1043 while (optind < argc) 1044 printf ("%s ", argv[optind++]); 1045 printf ("\n"); 1046 } 1047 1048 exit (0); 1049 } 1050 1051 #endif /* TEST */ 1052