| 1 | /* Getopt for GNU. |
| 2 | NOTE: getopt is now part of the C library, so if you don't know what |
| 3 | "Keep this file name-space clean" means, talk to roland@gnu.ai.mit.edu |
| 4 | before changing it! |
| 5 | |
| 6 | Copyright (C) 1987, 88, 89, 90, 91, 92, 1993 |
| 7 | Free Software Foundation, Inc. |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify it |
| 10 | under the terms of the GNU General Public License as published by the |
| 11 | Free Software Foundation; either version 2, or (at your option) any |
| 12 | later version. |
| 13 | |
| 14 | This program 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 |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with this program; if not, write to the Free Software |
| 21 | Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 22 | \f |
| 23 | #ifdef HAVE_CONFIG_H |
| 24 | #include "config.h" |
| 25 | #endif |
| 26 | |
| 27 | #if !__STDC__ && !defined(const) && IN_GCC |
| 28 | #define const |
| 29 | #endif |
| 30 | |
| 31 | /* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>. */ |
| 32 | #ifndef _NO_PROTO |
| 33 | #define _NO_PROTO |
| 34 | #endif |
| 35 | |
| 36 | #include <stdio.h> |
| 37 | |
| 38 | /* Comment out all this code if we are using the GNU C Library, and are not |
| 39 | actually compiling the library itself. This code is part of the GNU C |
| 40 | Library, but also included in many other GNU distributions. Compiling |
| 41 | and linking in this code is a waste when using the GNU C library |
| 42 | (especially if it is a shared library). Rather than having every GNU |
| 43 | program understand `configure --with-gnu-libc' and omit the object files, |
| 44 | it is simpler to just do this in the source for each such file. */ |
| 45 | |
| 46 | #if defined (_LIBC) || !defined (__GNU_LIBRARY__) |
| 47 | |
| 48 | |
| 49 | /* This needs to come after some library #include |
| 50 | to get __GNU_LIBRARY__ defined. */ |
| 51 | #ifdef __GNU_LIBRARY__ |
| 52 | /* Don't include stdlib.h for non-GNU C libraries because some of them |
| 53 | contain conflicting prototypes for getopt. */ |
| 54 | #include <stdlib.h> |
| 55 | #endif /* GNU C library. */ |
| 56 | |
| 57 | /* If GETOPT_COMPAT is defined, `+' as well as `--' can introduce a |
| 58 | long-named option. Because this is not POSIX.2 compliant, it is |
| 59 | being phased out. */ |
| 60 | /* #define GETOPT_COMPAT */ |
| 61 | |
| 62 | /* This version of `getopt' appears to the caller like standard Unix `getopt' |
| 63 | but it behaves differently for the user, since it allows the user |
| 64 | to intersperse the options with the other arguments. |
| 65 | |
| 66 | As `getopt' works, it permutes the elements of ARGV so that, |
| 67 | when it is done, all the options precede everything else. Thus |
| 68 | all application programs are extended to handle flexible argument order. |
| 69 | |
| 70 | Setting the environment variable POSIXLY_CORRECT disables permutation. |
| 71 | Then the behavior is completely standard. |
| 72 | |
| 73 | GNU application programs can use a third alternative mode in which |
| 74 | they can distinguish the relative order of options and other arguments. */ |
| 75 | |
| 76 | #include "getopt.h" |
| 77 | |
| 78 | /* For communication from `getopt' to the caller. |
| 79 | When `getopt' finds an option that takes an argument, |
| 80 | the argument value is returned here. |
| 81 | Also, when `ordering' is RETURN_IN_ORDER, |
| 82 | each non-option ARGV-element is returned here. */ |
| 83 | |
| 84 | char *optarg = 0; |
| 85 | |
| 86 | /* Index in ARGV of the next element to be scanned. |
| 87 | This is used for communication to and from the caller |
| 88 | and for communication between successive calls to `getopt'. |
| 89 | |
| 90 | On entry to `getopt', zero means this is the first call; initialize. |
| 91 | |
| 92 | When `getopt' returns EOF, this is the index of the first of the |
| 93 | non-option elements that the caller should itself scan. |
| 94 | |
| 95 | Otherwise, `optind' communicates from one call to the next |
| 96 | how much of ARGV has been scanned so far. */ |
| 97 | |
| 98 | /* XXX 1003.2 says this must be 1 before any call. */ |
| 99 | int optind = 0; |
| 100 | |
| 101 | /* The next char to be scanned in the option-element |
| 102 | in which the last option character we returned was found. |
| 103 | This allows us to pick up the scan where we left off. |
| 104 | |
| 105 | If this is zero, or a null string, it means resume the scan |
| 106 | by advancing to the next ARGV-element. */ |
| 107 | |
| 108 | static char *nextchar; |
| 109 | |
| 110 | /* Callers store zero here to inhibit the error message |
| 111 | for unrecognized options. */ |
| 112 | |
| 113 | int opterr = 1; |
| 114 | |
| 115 | /* Set to an option character which was unrecognized. |
| 116 | This must be initialized on some systems to avoid linking in the |
| 117 | system's own getopt implementation. */ |
| 118 | |
| 119 | int optopt = '?'; |
| 120 | |
| 121 | /* Describe how to deal with options that follow non-option ARGV-elements. |
| 122 | |
| 123 | If the caller did not specify anything, |
| 124 | the default is REQUIRE_ORDER if the environment variable |
| 125 | POSIXLY_CORRECT is defined, PERMUTE otherwise. |
| 126 | |
| 127 | REQUIRE_ORDER means don't recognize them as options; |
| 128 | stop option processing when the first non-option is seen. |
| 129 | This is what Unix does. |
| 130 | This mode of operation is selected by either setting the environment |
| 131 | variable POSIXLY_CORRECT, or using `+' as the first character |
| 132 | of the list of option characters. |
| 133 | |
| 134 | PERMUTE is the default. We permute the contents of ARGV as we scan, |
| 135 | so that eventually all the non-options are at the end. This allows options |
| 136 | to be given in any order, even with programs that were not written to |
| 137 | expect this. |
| 138 | |
| 139 | RETURN_IN_ORDER is an option available to programs that were written |
| 140 | to expect options and other ARGV-elements in any order and that care about |
| 141 | the ordering of the two. We describe each non-option ARGV-element |
| 142 | as if it were the argument of an option with character code 1. |
| 143 | Using `-' as the first character of the list of option characters |
| 144 | selects this mode of operation. |
| 145 | |
| 146 | The special argument `--' forces an end of option-scanning regardless |
| 147 | of the value of `ordering'. In the case of RETURN_IN_ORDER, only |
| 148 | `--' can cause `getopt' to return EOF with `optind' != ARGC. */ |
| 149 | |
| 150 | static enum |
| 151 | { |
| 152 | REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER |
| 153 | } ordering; |
| 154 | \f |
| 155 | #ifdef __GNU_LIBRARY__ |
| 156 | /* We want to avoid inclusion of string.h with non-GNU libraries |
| 157 | because there are many ways it can cause trouble. |
| 158 | On some systems, it contains special magic macros that don't work |
| 159 | in GCC. */ |
| 160 | #include <string.h> |
| 161 | #define my_index strchr |
| 162 | #define my_bcopy(src, dst, n) memcpy ((dst), (src), (n)) |
| 163 | #else |
| 164 | |
| 165 | /* Avoid depending on library functions or files |
| 166 | whose names are inconsistent. */ |
| 167 | |
| 168 | char *getenv (); |
| 169 | |
| 170 | static char * |
| 171 | my_index (str, chr) |
| 172 | const char *str; |
| 173 | int chr; |
| 174 | { |
| 175 | while (*str) |
| 176 | { |
| 177 | if (*str == chr) |
| 178 | return (char *) str; |
| 179 | str++; |
| 180 | } |
| 181 | return 0; |
| 182 | } |
| 183 | |
| 184 | static void |
| 185 | my_bcopy (from, to, size) |
| 186 | const char *from; |
| 187 | char *to; |
| 188 | int size; |
| 189 | { |
| 190 | int i; |
| 191 | for (i = 0; i < size; i++) |
| 192 | to[i] = from[i]; |
| 193 | } |
| 194 | #endif /* GNU C library. */ |
| 195 | \f |
| 196 | /* Handle permutation of arguments. */ |
| 197 | |
| 198 | /* Describe the part of ARGV that contains non-options that have |
| 199 | been skipped. `first_nonopt' is the index in ARGV of the first of them; |
| 200 | `last_nonopt' is the index after the last of them. */ |
| 201 | |
| 202 | static int first_nonopt; |
| 203 | static int last_nonopt; |
| 204 | |
| 205 | /* Exchange two adjacent subsequences of ARGV. |
| 206 | One subsequence is elements [first_nonopt,last_nonopt) |
| 207 | which contains all the non-options that have been skipped so far. |
| 208 | The other is elements [last_nonopt,optind), which contains all |
| 209 | the options processed since those non-options were skipped. |
| 210 | |
| 211 | `first_nonopt' and `last_nonopt' are relocated so that they describe |
| 212 | the new indices of the non-options in ARGV after they are moved. */ |
| 213 | |
| 214 | static void |
| 215 | exchange (argv) |
| 216 | char **argv; |
| 217 | { |
| 218 | int nonopts_size = (last_nonopt - first_nonopt) * sizeof (char *); |
| 219 | char **temp = (char **) safe_malloc (nonopts_size, "getopt"); |
| 220 | |
| 221 | /* Interchange the two blocks of data in ARGV. */ |
| 222 | |
| 223 | my_bcopy ((char *) &argv[first_nonopt], (char *) temp, nonopts_size); |
| 224 | my_bcopy ((char *) &argv[last_nonopt], (char *) &argv[first_nonopt], |
| 225 | (optind - last_nonopt) * sizeof (char *)); |
| 226 | my_bcopy ((char *) temp, |
| 227 | (char *) &argv[first_nonopt + optind - last_nonopt], |
| 228 | nonopts_size); |
| 229 | |
| 230 | /* Update records for the slots the non-options now occupy. */ |
| 231 | |
| 232 | first_nonopt += (optind - last_nonopt); |
| 233 | last_nonopt = optind; |
| 234 | free(temp); |
| 235 | } |
| 236 | \f |
| 237 | /* Scan elements of ARGV (whose length is ARGC) for option characters |
| 238 | given in OPTSTRING. |
| 239 | |
| 240 | If an element of ARGV starts with '-', and is not exactly "-" or "--", |
| 241 | then it is an option element. The characters of this element |
| 242 | (aside from the initial '-') are option characters. If `getopt' |
| 243 | is called repeatedly, it returns successively each of the option characters |
| 244 | from each of the option elements. |
| 245 | |
| 246 | If `getopt' finds another option character, it returns that character, |
| 247 | updating `optind' and `nextchar' so that the next call to `getopt' can |
| 248 | resume the scan with the following option character or ARGV-element. |
| 249 | |
| 250 | If there are no more option characters, `getopt' returns `EOF'. |
| 251 | Then `optind' is the index in ARGV of the first ARGV-element |
| 252 | that is not an option. (The ARGV-elements have been permuted |
| 253 | so that those that are not options now come last.) |
| 254 | |
| 255 | OPTSTRING is a string containing the legitimate option characters. |
| 256 | If an option character is seen that is not listed in OPTSTRING, |
| 257 | return '?' after printing an error message. If you set `opterr' to |
| 258 | zero, the error message is suppressed but we still return '?'. |
| 259 | |
| 260 | If a char in OPTSTRING is followed by a colon, that means it wants an arg, |
| 261 | so the following text in the same ARGV-element, or the text of the following |
| 262 | ARGV-element, is returned in `optarg'. Two colons mean an option that |
| 263 | wants an optional arg; if there is text in the current ARGV-element, |
| 264 | it is returned in `optarg', otherwise `optarg' is set to zero. |
| 265 | |
| 266 | If OPTSTRING starts with `-' or `+', it requests different methods of |
| 267 | handling the non-option ARGV-elements. |
| 268 | See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above. |
| 269 | |
| 270 | Long-named options begin with `--' instead of `-'. |
| 271 | Their names may be abbreviated as long as the abbreviation is unique |
| 272 | or is an exact match for some defined option. If they have an |
| 273 | argument, it follows the option name in the same ARGV-element, separated |
| 274 | from the option name by a `=', or else the in next ARGV-element. |
| 275 | When `getopt' finds a long-named option, it returns 0 if that option's |
| 276 | `flag' field is nonzero, the value of the option's `val' field |
| 277 | if the `flag' field is zero. |
| 278 | |
| 279 | The elements of ARGV aren't really const, because we permute them. |
| 280 | But we pretend they're const in the prototype to be compatible |
| 281 | with other systems. |
| 282 | |
| 283 | LONGOPTS is a vector of `struct option' terminated by an |
| 284 | element containing a name which is zero. |
| 285 | |
| 286 | LONGIND returns the index in LONGOPT of the long-named option found. |
| 287 | It is only valid when a long-named option has been found by the most |
| 288 | recent call. |
| 289 | |
| 290 | If LONG_ONLY is nonzero, '-' as well as '--' can introduce |
| 291 | long-named options. */ |
| 292 | |
| 293 | int |
| 294 | _getopt_internal (argc, argv, optstring, longopts, longind, long_only) |
| 295 | int argc; |
| 296 | char *const *argv; |
| 297 | const char *optstring; |
| 298 | const struct option *longopts; |
| 299 | int *longind; |
| 300 | int long_only; |
| 301 | { |
| 302 | int option_index; |
| 303 | |
| 304 | optarg = 0; |
| 305 | |
| 306 | /* Initialize the internal data when the first call is made. |
| 307 | Start processing options with ARGV-element 1 (since ARGV-element 0 |
| 308 | is the program name); the sequence of previously skipped |
| 309 | non-option ARGV-elements is empty. */ |
| 310 | |
| 311 | if (optind == 0) |
| 312 | { |
| 313 | first_nonopt = last_nonopt = optind = 1; |
| 314 | |
| 315 | nextchar = NULL; |
| 316 | |
| 317 | /* Determine how to handle the ordering of options and nonoptions. */ |
| 318 | |
| 319 | if (optstring[0] == '-') |
| 320 | { |
| 321 | ordering = RETURN_IN_ORDER; |
| 322 | ++optstring; |
| 323 | } |
| 324 | else if (optstring[0] == '+') |
| 325 | { |
| 326 | ordering = REQUIRE_ORDER; |
| 327 | ++optstring; |
| 328 | } |
| 329 | else if (getenv ("POSIXLY_CORRECT") != NULL) |
| 330 | ordering = REQUIRE_ORDER; |
| 331 | else |
| 332 | ordering = PERMUTE; |
| 333 | } |
| 334 | |
| 335 | if (nextchar == NULL || *nextchar == '\0') |
| 336 | { |
| 337 | if (ordering == PERMUTE) |
| 338 | { |
| 339 | /* If we have just processed some options following some non-options, |
| 340 | exchange them so that the options come first. */ |
| 341 | |
| 342 | if (first_nonopt != last_nonopt && last_nonopt != optind) |
| 343 | exchange ((char **) argv); |
| 344 | else if (last_nonopt != optind) |
| 345 | first_nonopt = optind; |
| 346 | |
| 347 | /* Now skip any additional non-options |
| 348 | and extend the range of non-options previously skipped. */ |
| 349 | |
| 350 | while (optind < argc |
| 351 | && (argv[optind][0] != '-' || argv[optind][1] == '\0') |
| 352 | #ifdef GETOPT_COMPAT |
| 353 | && (longopts == NULL |
| 354 | || argv[optind][0] != '+' || argv[optind][1] == '\0') |
| 355 | #endif /* GETOPT_COMPAT */ |
| 356 | ) |
| 357 | optind++; |
| 358 | last_nonopt = optind; |
| 359 | } |
| 360 | |
| 361 | /* Special ARGV-element `--' means premature end of options. |
| 362 | Skip it like a null option, |
| 363 | then exchange with previous non-options as if it were an option, |
| 364 | then skip everything else like a non-option. */ |
| 365 | |
| 366 | if (optind != argc && !strcmp (argv[optind], "--")) |
| 367 | { |
| 368 | optind++; |
| 369 | |
| 370 | if (first_nonopt != last_nonopt && last_nonopt != optind) |
| 371 | exchange ((char **) argv); |
| 372 | else if (first_nonopt == last_nonopt) |
| 373 | first_nonopt = optind; |
| 374 | last_nonopt = argc; |
| 375 | |
| 376 | optind = argc; |
| 377 | } |
| 378 | |
| 379 | /* If we have done all the ARGV-elements, stop the scan |
| 380 | and back over any non-options that we skipped and permuted. */ |
| 381 | |
| 382 | if (optind == argc) |
| 383 | { |
| 384 | /* Set the next-arg-index to point at the non-options |
| 385 | that we previously skipped, so the caller will digest them. */ |
| 386 | if (first_nonopt != last_nonopt) |
| 387 | optind = first_nonopt; |
| 388 | return EOF; |
| 389 | } |
| 390 | |
| 391 | /* If we have come to a non-option and did not permute it, |
| 392 | either stop the scan or describe it to the caller and pass it by. */ |
| 393 | |
| 394 | if ((argv[optind][0] != '-' || argv[optind][1] == '\0') |
| 395 | #ifdef GETOPT_COMPAT |
| 396 | && (longopts == NULL |
| 397 | || argv[optind][0] != '+' || argv[optind][1] == '\0') |
| 398 | #endif /* GETOPT_COMPAT */ |
| 399 | ) |
| 400 | { |
| 401 | if (ordering == REQUIRE_ORDER) |
| 402 | return EOF; |
| 403 | optarg = argv[optind++]; |
| 404 | return 1; |
| 405 | } |
| 406 | |
| 407 | /* We have found another option-ARGV-element. |
| 408 | Start decoding its characters. */ |
| 409 | |
| 410 | nextchar = (argv[optind] + 1 |
| 411 | + (longopts != NULL && argv[optind][1] == '-')); |
| 412 | } |
| 413 | |
| 414 | if (longopts != NULL |
| 415 | && ((argv[optind][0] == '-' |
| 416 | && (argv[optind][1] == '-' || long_only)) |
| 417 | #ifdef GETOPT_COMPAT |
| 418 | || argv[optind][0] == '+' |
| 419 | #endif /* GETOPT_COMPAT */ |
| 420 | )) |
| 421 | { |
| 422 | const struct option *p; |
| 423 | char *s = nextchar; |
| 424 | int exact = 0; |
| 425 | int ambig = 0; |
| 426 | const struct option *pfound = NULL; |
| 427 | int indfound; |
| 428 | |
| 429 | while (*s && *s != '=') |
| 430 | s++; |
| 431 | |
| 432 | /* Test all options for either exact match or abbreviated matches. */ |
| 433 | for (p = longopts, option_index = 0; p->name; |
| 434 | p++, option_index++) |
| 435 | if (!strncmp (p->name, nextchar, s - nextchar)) |
| 436 | { |
| 437 | if (s - nextchar == strlen (p->name)) |
| 438 | { |
| 439 | /* Exact match found. */ |
| 440 | pfound = p; |
| 441 | indfound = option_index; |
| 442 | exact = 1; |
| 443 | break; |
| 444 | } |
| 445 | else if (pfound == NULL) |
| 446 | { |
| 447 | /* First nonexact match found. */ |
| 448 | pfound = p; |
| 449 | indfound = option_index; |
| 450 | } |
| 451 | else |
| 452 | /* Second nonexact match found. */ |
| 453 | ambig = 1; |
| 454 | } |
| 455 | |
| 456 | if (ambig && !exact) |
| 457 | { |
| 458 | if (opterr) |
| 459 | fprintf (stderr, "%s: option `%s' is ambiguous\n", |
| 460 | argv[0], argv[optind]); |
| 461 | nextchar += strlen (nextchar); |
| 462 | optind++; |
| 463 | return '?'; |
| 464 | } |
| 465 | |
| 466 | if (pfound != NULL) |
| 467 | { |
| 468 | option_index = indfound; |
| 469 | optind++; |
| 470 | if (*s) |
| 471 | { |
| 472 | /* Don't test has_arg with >, because some C compilers don't |
| 473 | allow it to be used on enums. */ |
| 474 | if (pfound->has_arg) |
| 475 | optarg = s + 1; |
| 476 | else |
| 477 | { |
| 478 | if (opterr) |
| 479 | { |
| 480 | if (argv[optind - 1][1] == '-') |
| 481 | /* --option */ |
| 482 | fprintf (stderr, |
| 483 | "%s: option `--%s' doesn't allow an argument\n", |
| 484 | argv[0], pfound->name); |
| 485 | else |
| 486 | /* +option or -option */ |
| 487 | fprintf (stderr, |
| 488 | "%s: option `%c%s' doesn't allow an argument\n", |
| 489 | argv[0], argv[optind - 1][0], pfound->name); |
| 490 | } |
| 491 | nextchar += strlen (nextchar); |
| 492 | return '?'; |
| 493 | } |
| 494 | } |
| 495 | else if (pfound->has_arg == 1) |
| 496 | { |
| 497 | if (optind < argc) |
| 498 | optarg = argv[optind++]; |
| 499 | else |
| 500 | { |
| 501 | if (opterr) |
| 502 | fprintf (stderr, "%s: option `%s' requires an argument\n", |
| 503 | argv[0], argv[optind - 1]); |
| 504 | nextchar += strlen (nextchar); |
| 505 | return optstring[0] == ':' ? ':' : '?'; |
| 506 | } |
| 507 | } |
| 508 | nextchar += strlen (nextchar); |
| 509 | if (longind != NULL) |
| 510 | *longind = option_index; |
| 511 | if (pfound->flag) |
| 512 | { |
| 513 | *(pfound->flag) = pfound->val; |
| 514 | return 0; |
| 515 | } |
| 516 | return pfound->val; |
| 517 | } |
| 518 | /* Can't find it as a long option. If this is not getopt_long_only, |
| 519 | or the option starts with '--' or is not a valid short |
| 520 | option, then it's an error. |
| 521 | Otherwise interpret it as a short option. */ |
| 522 | if (!long_only || argv[optind][1] == '-' |
| 523 | #ifdef GETOPT_COMPAT |
| 524 | || argv[optind][0] == '+' |
| 525 | #endif /* GETOPT_COMPAT */ |
| 526 | || my_index (optstring, *nextchar) == NULL) |
| 527 | { |
| 528 | if (opterr) |
| 529 | { |
| 530 | if (argv[optind][1] == '-') |
| 531 | /* --option */ |
| 532 | fprintf (stderr, "%s: unrecognized option `--%s'\n", |
| 533 | argv[0], nextchar); |
| 534 | else |
| 535 | /* +option or -option */ |
| 536 | fprintf (stderr, "%s: unrecognized option `%c%s'\n", |
| 537 | argv[0], argv[optind][0], nextchar); |
| 538 | } |
| 539 | nextchar = (char *) ""; |
| 540 | optind++; |
| 541 | return '?'; |
| 542 | } |
| 543 | } |
| 544 | |
| 545 | /* Look at and handle the next option-character. */ |
| 546 | |
| 547 | { |
| 548 | char c = *nextchar++; |
| 549 | char *temp = my_index (optstring, c); |
| 550 | |
| 551 | /* Increment `optind' when we start to process its last character. */ |
| 552 | if (*nextchar == '\0') |
| 553 | ++optind; |
| 554 | |
| 555 | if (temp == NULL || c == ':') |
| 556 | { |
| 557 | if (opterr) |
| 558 | { |
| 559 | #if 0 |
| 560 | if (c < 040 || c >= 0177) |
| 561 | fprintf (stderr, "%s: unrecognized option, character code 0%o\n", |
| 562 | argv[0], c); |
| 563 | else |
| 564 | fprintf (stderr, "%s: unrecognized option `-%c'\n", argv[0], c); |
| 565 | #else |
| 566 | /* 1003.2 specifies the format of this message. */ |
| 567 | fprintf (stderr, "%s: illegal option -- %c\n", argv[0], c); |
| 568 | #endif |
| 569 | } |
| 570 | optopt = c; |
| 571 | return '?'; |
| 572 | } |
| 573 | if (temp[1] == ':') |
| 574 | { |
| 575 | if (temp[2] == ':') |
| 576 | { |
| 577 | /* This is an option that accepts an argument optionally. */ |
| 578 | if (*nextchar != '\0') |
| 579 | { |
| 580 | optarg = nextchar; |
| 581 | optind++; |
| 582 | } |
| 583 | else |
| 584 | optarg = 0; |
| 585 | nextchar = NULL; |
| 586 | } |
| 587 | else |
| 588 | { |
| 589 | /* This is an option that requires an argument. */ |
| 590 | if (*nextchar != '\0') |
| 591 | { |
| 592 | optarg = nextchar; |
| 593 | /* If we end this ARGV-element by taking the rest as an arg, |
| 594 | we must advance to the next element now. */ |
| 595 | optind++; |
| 596 | } |
| 597 | else if (optind == argc) |
| 598 | { |
| 599 | if (opterr) |
| 600 | { |
| 601 | #if 0 |
| 602 | fprintf (stderr, "%s: option `-%c' requires an argument\n", |
| 603 | argv[0], c); |
| 604 | #else |
| 605 | /* 1003.2 specifies the format of this message. */ |
| 606 | fprintf (stderr, "%s: option requires an argument -- %c\n", |
| 607 | argv[0], c); |
| 608 | #endif |
| 609 | } |
| 610 | optopt = c; |
| 611 | if (optstring[0] == ':') |
| 612 | c = ':'; |
| 613 | else |
| 614 | c = '?'; |
| 615 | } |
| 616 | else |
| 617 | /* We already incremented `optind' once; |
| 618 | increment it again when taking next ARGV-elt as argument. */ |
| 619 | optarg = argv[optind++]; |
| 620 | nextchar = NULL; |
| 621 | } |
| 622 | } |
| 623 | return c; |
| 624 | } |
| 625 | } |
| 626 | |
| 627 | int |
| 628 | getopt (argc, argv, optstring) |
| 629 | int argc; |
| 630 | char *const *argv; |
| 631 | const char *optstring; |
| 632 | { |
| 633 | return _getopt_internal (argc, argv, optstring, |
| 634 | (const struct option *) 0, |
| 635 | (int *) 0, |
| 636 | 0); |
| 637 | } |
| 638 | |
| 639 | #endif /* _LIBC or not __GNU_LIBRARY__. */ |
| 640 | \f |
| 641 | #ifdef TEST |
| 642 | |
| 643 | /* Compile with -DTEST to make an executable for use in testing |
| 644 | the above definition of `getopt'. */ |
| 645 | |
| 646 | int |
| 647 | main (argc, argv) |
| 648 | int argc; |
| 649 | char **argv; |
| 650 | { |
| 651 | int c; |
| 652 | int digit_optind = 0; |
| 653 | |
| 654 | while (1) |
| 655 | { |
| 656 | int this_option_optind = optind ? optind : 1; |
| 657 | |
| 658 | c = getopt (argc, argv, "abc:d:0123456789"); |
| 659 | if (c == EOF) |
| 660 | break; |
| 661 | |
| 662 | switch (c) |
| 663 | { |
| 664 | case '0': |
| 665 | case '1': |
| 666 | case '2': |
| 667 | case '3': |
| 668 | case '4': |
| 669 | case '5': |
| 670 | case '6': |
| 671 | case '7': |
| 672 | case '8': |
| 673 | case '9': |
| 674 | if (digit_optind != 0 && digit_optind != this_option_optind) |
| 675 | printf ("digits occur in two different argv-elements.\n"); |
| 676 | digit_optind = this_option_optind; |
| 677 | printf ("option %c\n", c); |
| 678 | break; |
| 679 | |
| 680 | case 'a': |
| 681 | printf ("option a\n"); |
| 682 | break; |
| 683 | |
| 684 | case 'b': |
| 685 | printf ("option b\n"); |
| 686 | break; |
| 687 | |
| 688 | case 'c': |
| 689 | printf ("option c with value `%s'\n", optarg); |
| 690 | break; |
| 691 | |
| 692 | case '?': |
| 693 | break; |
| 694 | |
| 695 | default: |
| 696 | printf ("?? getopt returned character code 0%o ??\n", c); |
| 697 | } |
| 698 | } |
| 699 | |
| 700 | if (optind < argc) |
| 701 | { |
| 702 | printf ("non-option ARGV-elements: "); |
| 703 | while (optind < argc) |
| 704 | printf ("%s ", argv[optind++]); |
| 705 | printf ("\n"); |
| 706 | } |
| 707 | |
| 708 | exit (0); |
| 709 | } |
| 710 | |
| 711 | #endif /* TEST */ |