1 /* Getopt for GNU. 2 NOTE: getopt is now part of the C library, so if you don't know what 3 "Keep this file name-space clean" means, talk to drepper@gnu.org 4 before changing it! 5 6 Copyright (C) 1987, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98 7 Free Software Foundation, Inc. 8 9 NOTE: The canonical source of this file is maintained with the GNU C Library. 10 Bugs can be reported to bug-glibc@gnu.org. 11 12 This program is free software; you can redistribute it and/or modify it 13 under the terms of the GNU General Public License as published by the 14 Free Software Foundation; either version 2, or (at your option) any 15 later version. 16 17 This program is distributed in the hope that it will be useful, 18 but WITHOUT ANY WARRANTY; without even the implied warranty of 19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 GNU General Public License for more details. 21 22 You should have received a copy of the GNU General Public License 23 along with this program; if not, write to the Free Software 24 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 25 USA. */ 26 27 /* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>. 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 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 # ifdef HAVE_LIBINTL_H 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 #ifndef getenv 216 #ifdef __cplusplus 217 extern "C" { 218 #endif 219 extern char *getenv (const char *name); 220 #ifdef __cplusplus 221 } 222 #endif 223 #endif 224 225 static char * 226 my_index (const char *str, int chr) 227 { 228 while (*str) 229 { 230 if (*str == chr) 231 return (char *) str; 232 str++; 233 } 234 return 0; 235 } 236 237 /* If using GCC, we can safely declare strlen this way. 238 If not using GCC, it is ok not to declare it. */ 239 #ifdef __GNUC__ 240 /* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h. 241 That was relevant to code that was here before. */ 242 # if (!defined __STDC__ || !__STDC__) && !defined strlen 243 /* gcc with -traditional declares the built-in strlen to return int, 244 and has done so at least since version 2.4.5. -- rms. */ 245 extern int strlen (const char *); 246 # endif /* not __STDC__ */ 247 #endif /* __GNUC__ */ 248 249 #endif /* not __GNU_LIBRARY__ */ 250 251 /* Handle permutation of arguments. */ 252 253 /* Describe the part of ARGV that contains non-options that have 254 been skipped. `first_nonopt' is the index in ARGV of the first of them; 255 `last_nonopt' is the index after the last of them. */ 256 257 static int first_nonopt; 258 static int last_nonopt; 259 260 #ifdef _LIBC 261 /* Bash 2.0 gives us an environment variable containing flags 262 indicating ARGV elements that should not be considered arguments. */ 263 264 /* Defined in getopt_init.c */ 265 extern char *__getopt_nonoption_flags; 266 267 static int nonoption_flags_max_len; 268 static int nonoption_flags_len; 269 270 static int original_argc; 271 static char *const *original_argv; 272 273 /* Make sure the environment variable bash 2.0 puts in the environment 274 is valid for the getopt call we must make sure that the ARGV passed 275 to getopt is that one passed to the process. */ 276 static void 277 __attribute__ ((unused)) 278 store_args_and_env (int argc, char *const *argv) 279 { 280 /* XXX This is no good solution. We should rather copy the args so 281 that we can compare them later. But we must not use malloc(3). */ 282 original_argc = argc; 283 original_argv = argv; 284 } 285 # ifdef text_set_element 286 text_set_element (__libc_subinit, store_args_and_env); 287 # endif /* text_set_element */ 288 289 # define SWAP_FLAGS(ch1, ch2) \ 290 if (nonoption_flags_len > 0) \ 291 { \ 292 char __tmp = __getopt_nonoption_flags[ch1]; \ 293 __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \ 294 __getopt_nonoption_flags[ch2] = __tmp; \ 295 } 296 #else /* !_LIBC */ 297 # define SWAP_FLAGS(ch1, ch2) 298 #endif /* _LIBC */ 299 300 /* Exchange two adjacent subsequences of ARGV. 301 One subsequence is elements [first_nonopt,last_nonopt) 302 which contains all the non-options that have been skipped so far. 303 The other is elements [last_nonopt,optind), which contains all 304 the options processed since those non-options were skipped. 305 306 `first_nonopt' and `last_nonopt' are relocated so that they describe 307 the new indices of the non-options in ARGV after they are moved. */ 308 309 #if defined __STDC__ && __STDC__ 310 static void exchange (char **); 311 #endif 312 313 static void 314 exchange (char **argv) 315 { 316 int bottom = first_nonopt; 317 int middle = last_nonopt; 318 int top = optind; 319 char *tem; 320 321 /* Exchange the shorter segment with the far end of the longer segment. 322 That puts the shorter segment into the right place. 323 It leaves the longer segment in the right place overall, 324 but it consists of two parts that need to be swapped next. */ 325 326 #ifdef _LIBC 327 /* First make sure the handling of the `__getopt_nonoption_flags' 328 string can work normally. Our top argument must be in the range 329 of the string. */ 330 if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len) 331 { 332 /* We must extend the array. The user plays games with us and 333 presents new arguments. */ 334 char *new_str = malloc (top + 1); 335 if (new_str == NULL) 336 nonoption_flags_len = nonoption_flags_max_len = 0; 337 else 338 { 339 memset (__mempcpy (new_str, __getopt_nonoption_flags, 340 nonoption_flags_max_len), 341 '\0', top + 1 - nonoption_flags_max_len); 342 nonoption_flags_max_len = top + 1; 343 __getopt_nonoption_flags = new_str; 344 } 345 } 346 #endif 347 348 while (top > middle && middle > bottom) 349 { 350 if (top - middle > middle - bottom) 351 { 352 /* Bottom segment is the short one. */ 353 int len = middle - bottom; 354 register int i; 355 356 /* Swap it with the top part of the top segment. */ 357 for (i = 0; i < len; i++) 358 { 359 tem = argv[bottom + i]; 360 argv[bottom + i] = argv[top - (middle - bottom) + i]; 361 argv[top - (middle - bottom) + i] = tem; 362 SWAP_FLAGS (bottom + i, top - (middle - bottom) + i); 363 } 364 /* Exclude the moved bottom segment from further swapping. */ 365 top -= len; 366 } 367 else 368 { 369 /* Top segment is the short one. */ 370 int len = top - middle; 371 register int i; 372 373 /* Swap it with the bottom part of the bottom segment. */ 374 for (i = 0; i < len; i++) 375 { 376 tem = argv[bottom + i]; 377 argv[bottom + i] = argv[middle + i]; 378 argv[middle + i] = tem; 379 SWAP_FLAGS (bottom + i, middle + i); 380 } 381 /* Exclude the moved top segment from further swapping. */ 382 bottom += len; 383 } 384 } 385 386 /* Update records for the slots the non-options now occupy. */ 387 388 first_nonopt += (optind - last_nonopt); 389 last_nonopt = optind; 390 } 391 392 /* Initialize the internal data when the first call is made. */ 393 394 #if defined __STDC__ && __STDC__ 395 static const char *_getopt_initialize (int, char *const *, const char *); 396 #endif 397 398 static const char * 399 _getopt_initialize (int argc, char *const *argv, const char *optstring) 400 { 401 /* Start processing options with ARGV-element 1 (since ARGV-element 0 402 is the program name); the sequence of previously skipped 403 non-option ARGV-elements is empty. */ 404 405 first_nonopt = last_nonopt = optind; 406 407 nextchar = NULL; 408 409 posixly_correct = getenv ("POSIXLY_CORRECT"); 410 411 /* Determine how to handle the ordering of options and nonoptions. */ 412 413 if (optstring[0] == '-') 414 { 415 ordering = RETURN_IN_ORDER; 416 ++optstring; 417 } 418 else if (optstring[0] == '+') 419 { 420 ordering = REQUIRE_ORDER; 421 ++optstring; 422 } 423 else if (posixly_correct != NULL) 424 ordering = REQUIRE_ORDER; 425 else 426 ordering = PERMUTE; 427 428 #ifdef _LIBC 429 if (posixly_correct == NULL 430 && argc == original_argc && argv == original_argv) 431 { 432 if (nonoption_flags_max_len == 0) 433 { 434 if (__getopt_nonoption_flags == NULL 435 || __getopt_nonoption_flags[0] == '\0') 436 nonoption_flags_max_len = -1; 437 else 438 { 439 const char *orig_str = __getopt_nonoption_flags; 440 int len = nonoption_flags_max_len = strlen (orig_str); 441 if (nonoption_flags_max_len < argc) 442 nonoption_flags_max_len = argc; 443 __getopt_nonoption_flags = 444 (char *) malloc (nonoption_flags_max_len); 445 if (__getopt_nonoption_flags == NULL) 446 nonoption_flags_max_len = -1; 447 else 448 memset (__mempcpy (__getopt_nonoption_flags, orig_str, len), 449 '\0', nonoption_flags_max_len - len); 450 } 451 } 452 nonoption_flags_len = nonoption_flags_max_len; 453 } 454 else 455 nonoption_flags_len = 0; 456 #endif 457 458 return optstring; 459 } 460 461 /* Scan elements of ARGV (whose length is ARGC) for option characters 462 given in OPTSTRING. 463 464 If an element of ARGV starts with '-', and is not exactly "-" or "--", 465 then it is an option element. The characters of this element 466 (aside from the initial '-') are option characters. If `getopt' 467 is called repeatedly, it returns successively each of the option characters 468 from each of the option elements. 469 470 If `getopt' finds another option character, it returns that character, 471 updating `optind' and `nextchar' so that the next call to `getopt' can 472 resume the scan with the following option character or ARGV-element. 473 474 If there are no more option characters, `getopt' returns -1. 475 Then `optind' is the index in ARGV of the first ARGV-element 476 that is not an option. (The ARGV-elements have been permuted 477 so that those that are not options now come last.) 478 479 OPTSTRING is a string containing the legitimate option characters. 480 If an option character is seen that is not listed in OPTSTRING, 481 return '?' after printing an error message. If you set `opterr' to 482 zero, the error message is suppressed but we still return '?'. 483 484 If a char in OPTSTRING is followed by a colon, that means it wants an arg, 485 so the following text in the same ARGV-element, or the text of the following 486 ARGV-element, is returned in `optarg'. Two colons mean an option that 487 wants an optional arg; if there is text in the current ARGV-element, 488 it is returned in `optarg', otherwise `optarg' is set to zero. 489 490 If OPTSTRING starts with `-' or `+', it requests different methods of 491 handling the non-option ARGV-elements. 492 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above. 493 494 Long-named options begin with `--' instead of `-'. 495 Their names may be abbreviated as long as the abbreviation is unique 496 or is an exact match for some defined option. If they have an 497 argument, it follows the option name in the same ARGV-element, separated 498 from the option name by a `=', or else the in next ARGV-element. 499 When `getopt' finds a long-named option, it returns 0 if that option's 500 `flag' field is nonzero, the value of the option's `val' field 501 if the `flag' field is zero. 502 503 The elements of ARGV aren't really const, because we permute them. 504 But we pretend they're const in the prototype to be compatible 505 with other systems. 506 507 LONGOPTS is a vector of `struct option' terminated by an 508 element containing a name which is zero. 509 510 LONGIND returns the index in LONGOPT of the long-named option found. 511 It is only valid when a long-named option has been found by the most 512 recent call. 513 514 If LONG_ONLY is nonzero, '-' as well as '--' can introduce 515 long-named options. */ 516 517 int 518 _getopt_internal (int argc, char *const *argv, const char *optstring, const struct option *longopts, int *longind, int long_only) 519 { 520 optarg = NULL; 521 522 if (optind == 0 || !__getopt_initialized) 523 { 524 if (optind == 0) 525 optind = 1; /* Don't scan ARGV[0], the program name. */ 526 optstring = _getopt_initialize (argc, argv, optstring); 527 __getopt_initialized = 1; 528 } 529 530 /* Test whether ARGV[optind] points to a non-option argument. 531 Either it does not have option syntax, or there is an environment flag 532 from the shell indicating it is not an option. The later information 533 is only used when the used in the GNU libc. */ 534 #ifdef _LIBC 535 # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \ 536 || (optind < nonoption_flags_len \ 537 && __getopt_nonoption_flags[optind] == '1')) 538 #else 539 # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0') 540 #endif 541 542 if (nextchar == NULL || *nextchar == '\0') 543 { 544 /* Advance to the next ARGV-element. */ 545 546 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been 547 moved back by the user (who may also have changed the arguments). */ 548 if (last_nonopt > optind) 549 last_nonopt = optind; 550 if (first_nonopt > optind) 551 first_nonopt = optind; 552 553 if (ordering == PERMUTE) 554 { 555 /* If we have just processed some options following some non-options, 556 exchange them so that the options come first. */ 557 558 if (first_nonopt != last_nonopt && last_nonopt != optind) 559 exchange ((char **) argv); 560 else if (last_nonopt != optind) 561 first_nonopt = optind; 562 563 /* Skip any additional non-options 564 and extend the range of non-options previously skipped. */ 565 566 while (optind < argc && NONOPTION_P) 567 optind++; 568 last_nonopt = optind; 569 } 570 571 /* The special ARGV-element `--' means premature end of options. 572 Skip it like a null option, 573 then exchange with previous non-options as if it were an option, 574 then skip everything else like a non-option. */ 575 576 if (optind != argc && !strcmp (argv[optind], "--")) 577 { 578 optind++; 579 580 if (first_nonopt != last_nonopt && last_nonopt != optind) 581 exchange ((char **) argv); 582 else if (first_nonopt == last_nonopt) 583 first_nonopt = optind; 584 last_nonopt = argc; 585 586 optind = argc; 587 } 588 589 /* If we have done all the ARGV-elements, stop the scan 590 and back over any non-options that we skipped and permuted. */ 591 592 if (optind == argc) 593 { 594 /* Set the next-arg-index to point at the non-options 595 that we previously skipped, so the caller will digest them. */ 596 if (first_nonopt != last_nonopt) 597 optind = first_nonopt; 598 return -1; 599 } 600 601 /* If we have come to a non-option and did not permute it, 602 either stop the scan or describe it to the caller and pass it by. */ 603 604 if (NONOPTION_P) 605 { 606 if (ordering == REQUIRE_ORDER) 607 return -1; 608 optarg = argv[optind++]; 609 return 1; 610 } 611 612 /* We have found another option-ARGV-element. 613 Skip the initial punctuation. */ 614 615 nextchar = (argv[optind] + 1 616 + (longopts != NULL && argv[optind][1] == '-')); 617 } 618 619 /* Decode the current option-ARGV-element. */ 620 621 /* Check whether the ARGV-element is a long option. 622 623 If long_only and the ARGV-element has the form "-f", where f is 624 a valid short option, don't consider it an abbreviated form of 625 a long option that starts with f. Otherwise there would be no 626 way to give the -f short option. 627 628 On the other hand, if there's a long option "fubar" and 629 the ARGV-element is "-fu", do consider that an abbreviation of 630 the long option, just like "--fu", and not "-f" with arg "u". 631 632 This distinction seems to be the most useful approach. */ 633 634 if (longopts != NULL 635 && (argv[optind][1] == '-' 636 || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1]))))) 637 { 638 char *nameend; 639 const struct option *p; 640 const struct option *pfound = NULL; 641 int exact = 0; 642 int ambig = 0; 643 int indfound = -1; 644 int option_index; 645 646 for (nameend = nextchar; *nameend && *nameend != '='; nameend++) 647 /* Do nothing. */ ; 648 649 /* Test all long options for either exact match 650 or abbreviated matches. */ 651 for (p = longopts, option_index = 0; p->name; p++, option_index++) 652 if (!strncmp (p->name, nextchar, nameend - nextchar)) 653 { 654 if ((unsigned int) (nameend - nextchar) 655 == (unsigned int) strlen (p->name)) 656 { 657 /* Exact match found. */ 658 pfound = p; 659 indfound = option_index; 660 exact = 1; 661 break; 662 } 663 else if (pfound == NULL) 664 { 665 /* First nonexact match found. */ 666 pfound = p; 667 indfound = option_index; 668 } 669 else 670 /* Second or later nonexact match found. */ 671 ambig = 1; 672 } 673 674 if (ambig && !exact) 675 { 676 if (opterr) 677 fprintf (stderr, _("%s: option `%s' is ambiguous\n"), 678 argv[0], argv[optind]); 679 nextchar += strlen (nextchar); 680 optind++; 681 optopt = 0; 682 return '?'; 683 } 684 685 if (pfound != NULL) 686 { 687 option_index = indfound; 688 optind++; 689 if (*nameend) 690 { 691 /* Don't test has_arg with >, because some C compilers don't 692 allow it to be used on enums. */ 693 if (pfound->has_arg) 694 optarg = nameend + 1; 695 else 696 { 697 if (opterr) 698 { 699 if (argv[optind - 1][1] == '-') 700 /* --option */ 701 fprintf (stderr, 702 _("%s: option `--%s' doesn't allow an argument\n"), 703 argv[0], pfound->name); 704 else 705 /* +option or -option */ 706 fprintf (stderr, 707 _("%s: option `%c%s' doesn't allow an argument\n"), 708 argv[0], argv[optind - 1][0], pfound->name); 709 710 nextchar += strlen (nextchar); 711 712 optopt = pfound->val; 713 return '?'; 714 } 715 } 716 } 717 else if (pfound->has_arg == 1) 718 { 719 if (optind < argc) 720 optarg = argv[optind++]; 721 else 722 { 723 if (opterr) 724 fprintf (stderr, 725 _("%s: option `%s' requires an argument\n"), 726 argv[0], argv[optind - 1]); 727 nextchar += strlen (nextchar); 728 optopt = pfound->val; 729 return optstring[0] == ':' ? ':' : '?'; 730 } 731 } 732 nextchar += strlen (nextchar); 733 if (longind != NULL) 734 *longind = option_index; 735 if (pfound->flag) 736 { 737 *(pfound->flag) = pfound->val; 738 return 0; 739 } 740 return pfound->val; 741 } 742 743 /* Can't find it as a long option. If this is not getopt_long_only, 744 or the option starts with '--' or is not a valid short 745 option, then it's an error. 746 Otherwise interpret it as a short option. */ 747 if (!long_only || argv[optind][1] == '-' 748 || my_index (optstring, *nextchar) == NULL) 749 { 750 if (opterr) 751 { 752 if (argv[optind][1] == '-') 753 /* --option */ 754 fprintf (stderr, _("%s: unrecognized option `--%s'\n"), 755 argv[0], nextchar); 756 else 757 /* +option or -option */ 758 fprintf (stderr, _("%s: unrecognized option `%c%s'\n"), 759 argv[0], argv[optind][0], nextchar); 760 } 761 nextchar = (char *) ""; 762 optind++; 763 optopt = 0; 764 return '?'; 765 } 766 } 767 768 /* Look at and handle the next short option-character. */ 769 770 { 771 char c = *nextchar++; 772 char *temp = my_index (optstring, c); 773 774 /* Increment `optind' when we start to process its last character. */ 775 if (*nextchar == '\0') 776 ++optind; 777 778 if (temp == NULL || c == ':') 779 { 780 if (opterr) 781 { 782 if (posixly_correct) 783 /* 1003.2 specifies the format of this message. */ 784 fprintf (stderr, _("%s: illegal option -- %c\n"), 785 argv[0], c); 786 else 787 fprintf (stderr, _("%s: invalid option -- %c\n"), 788 argv[0], c); 789 } 790 optopt = c; 791 return '?'; 792 } 793 /* Convenience. Treat POSIX -W foo same as long option --foo */ 794 if (temp[0] == 'W' && temp[1] == ';') 795 { 796 char *nameend; 797 const struct option *p; 798 const struct option *pfound = NULL; 799 int exact = 0; 800 int ambig = 0; 801 int indfound = 0; 802 int option_index; 803 804 /* This is an option that requires an argument. */ 805 if (*nextchar != '\0') 806 { 807 optarg = nextchar; 808 /* If we end this ARGV-element by taking the rest as an arg, 809 we must advance to the next element now. */ 810 optind++; 811 } 812 else if (optind == argc) 813 { 814 if (opterr) 815 { 816 /* 1003.2 specifies the format of this message. */ 817 fprintf (stderr, _("%s: option requires an argument -- %c\n"), 818 argv[0], c); 819 } 820 optopt = c; 821 if (optstring[0] == ':') 822 c = ':'; 823 else 824 c = '?'; 825 return c; 826 } 827 else 828 /* We already incremented `optind' once; 829 increment it again when taking next ARGV-elt as argument. */ 830 optarg = argv[optind++]; 831 832 /* optarg is now the argument, see if it's in the 833 table of longopts. */ 834 835 for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++) 836 /* Do nothing. */ ; 837 838 /* Test all long options for either exact match 839 or abbreviated matches. */ 840 for (p = longopts, option_index = 0; p->name; p++, option_index++) 841 if (!strncmp (p->name, nextchar, nameend - nextchar)) 842 { 843 if ((unsigned int) (nameend - nextchar) == strlen (p->name)) 844 { 845 /* Exact match found. */ 846 pfound = p; 847 indfound = option_index; 848 exact = 1; 849 break; 850 } 851 else if (pfound == NULL) 852 { 853 /* First nonexact match found. */ 854 pfound = p; 855 indfound = option_index; 856 } 857 else 858 /* Second or later nonexact match found. */ 859 ambig = 1; 860 } 861 if (ambig && !exact) 862 { 863 if (opterr) 864 fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"), 865 argv[0], argv[optind]); 866 nextchar += strlen (nextchar); 867 optind++; 868 return '?'; 869 } 870 if (pfound != NULL) 871 { 872 option_index = indfound; 873 if (*nameend) 874 { 875 /* Don't test has_arg with >, because some C compilers don't 876 allow it to be used on enums. */ 877 if (pfound->has_arg) 878 optarg = nameend + 1; 879 else 880 { 881 if (opterr) 882 fprintf (stderr, _("\ 883 %s: option `-W %s' doesn't allow an argument\n"), 884 argv[0], pfound->name); 885 886 nextchar += strlen (nextchar); 887 return '?'; 888 } 889 } 890 else if (pfound->has_arg == 1) 891 { 892 if (optind < argc) 893 optarg = argv[optind++]; 894 else 895 { 896 if (opterr) 897 fprintf (stderr, 898 _("%s: option `%s' requires an argument\n"), 899 argv[0], argv[optind - 1]); 900 nextchar += strlen (nextchar); 901 return optstring[0] == ':' ? ':' : '?'; 902 } 903 } 904 nextchar += strlen (nextchar); 905 if (longind != NULL) 906 *longind = option_index; 907 if (pfound->flag) 908 { 909 *(pfound->flag) = pfound->val; 910 return 0; 911 } 912 return pfound->val; 913 } 914 nextchar = NULL; 915 return 'W'; /* Let the application handle it. */ 916 } 917 if (temp[1] == ':') 918 { 919 if (temp[2] == ':') 920 { 921 /* This is an option that accepts an argument optionally. */ 922 if (*nextchar != '\0') 923 { 924 optarg = nextchar; 925 optind++; 926 } 927 else 928 optarg = NULL; 929 nextchar = NULL; 930 } 931 else 932 { 933 /* This is an option that requires an argument. */ 934 if (*nextchar != '\0') 935 { 936 optarg = nextchar; 937 /* If we end this ARGV-element by taking the rest as an arg, 938 we must advance to the next element now. */ 939 optind++; 940 } 941 else if (optind == argc) 942 { 943 if (opterr) 944 { 945 /* 1003.2 specifies the format of this message. */ 946 fprintf (stderr, 947 _("%s: option requires an argument -- %c\n"), 948 argv[0], c); 949 } 950 optopt = c; 951 if (optstring[0] == ':') 952 c = ':'; 953 else 954 c = '?'; 955 } 956 else 957 /* We already incremented `optind' once; 958 increment it again when taking next ARGV-elt as argument. */ 959 optarg = argv[optind++]; 960 nextchar = NULL; 961 } 962 } 963 return c; 964 } 965 } 966 967 int 968 getopt (int argc, char *const *argv, const char *optstring) 969 { 970 return _getopt_internal (argc, argv, optstring, 971 (const struct option *) 0, 972 (int *) 0, 973 0); 974 } 975 976 #endif /* Not ELIDE_CODE. */ 977 978 #ifdef TEST 979 980 /* Compile with -DTEST to make an executable for use in testing 981 the above definition of `getopt'. */ 982 983 int 984 main (argc, argv) 985 int argc; 986 char **argv; 987 { 988 int c; 989 int digit_optind = 0; 990 991 while (1) 992 { 993 int this_option_optind = optind ? optind : 1; 994 995 c = getopt (argc, argv, "abc:d:0123456789"); 996 if (c == -1) 997 break; 998 999 switch (c) 1000 { 1001 case '0': 1002 case '1': 1003 case '2': 1004 case '3': 1005 case '4': 1006 case '5': 1007 case '6': 1008 case '7': 1009 case '8': 1010 case '9': 1011 if (digit_optind != 0 && digit_optind != this_option_optind) 1012 printf ("digits occur in two different argv-elements.\n"); 1013 digit_optind = this_option_optind; 1014 printf ("option %c\n", c); 1015 break; 1016 1017 case 'a': 1018 printf ("option a\n"); 1019 break; 1020 1021 case 'b': 1022 printf ("option b\n"); 1023 break; 1024 1025 case 'c': 1026 printf ("option c with value `%s'\n", optarg); 1027 break; 1028 1029 case '?': 1030 break; 1031 1032 default: 1033 printf ("?? getopt returned character code 0%o ??\n", c); 1034 } 1035 } 1036 1037 if (optind < argc) 1038 { 1039 printf ("non-option ARGV-elements: "); 1040 while (optind < argc) 1041 printf ("%s ", argv[optind++]); 1042 printf ("\n"); 1043 } 1044 1045 exit (0); 1046 } 1047 1048 #endif /* TEST */ |