Mercurial > hg > xemacs-beta
annotate lib-src/getopt.c @ 5750:66d2f63df75f
Correct some spelling and formatting in behavior.el.
Mentioned in tracker issue 826, the third thing mentioned there (the file
name at the bottom of the file) had already been fixed.
lisp/ChangeLog addition:
2013-08-05 Aidan Kehoe <kehoea@parhasard.net>
* behavior.el:
(override-behavior):
Correct some spelling and formatting here, thank you Steven
Mitchell in tracker issue 826.
| author | Aidan Kehoe <kehoea@parhasard.net> |
|---|---|
| date | Mon, 05 Aug 2013 10:05:32 +0100 |
| parents | 061f4f90f874 |
| children |
| rev | line source |
|---|---|
| 428 | 1 /* Getopt for GNU. |
| 2 NOTE: getopt is now part of the C library, so if you don't know what | |
| 3 "Keep this file name-space clean" means, talk to roland@gnu.ai.mit.edu | |
| 4 before changing it! | |
| 5 | |
| 6 Copyright (C) 1987, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97 | |
| 7 Free Software Foundation, Inc. | |
| 8 | |
| 9 NOTE: The canonical source of this file is maintained with the GNU C Library. | |
| 10 Bugs can be reported to bug-glibc@prep.ai.mit.edu. | |
| 11 | |
|
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12 This program is free software: you can redistribute it and/or modify it |
| 428 | 13 under the terms of the GNU General Public License as published by the |
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14 Free Software Foundation, either version 3 of the License, or (at your |
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15 option) any later version. |
| 428 | 16 |
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17 This program is distributed in the hope that it will be useful, but WITHOUT |
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18 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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19 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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20 for more details. |
| 428 | 21 |
| 22 You should have received a copy of the GNU General Public License | |
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23 along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 428 | 24 |
| 25 /* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>. | |
| 26 Ditto for AIX 3.2 and <stdlib.h>. */ | |
| 27 #ifndef _NO_PROTO | |
| 28 #define _NO_PROTO | |
| 29 #endif | |
| 30 | |
| 31 #ifdef HAVE_CONFIG_H | |
| 438 | 32 #include <config.h> |
| 428 | 33 #endif |
| 34 | |
| 35 #include <stdio.h> | |
| 36 #include <string.h> | |
| 37 #include <stdlib.h> | |
| 38 | |
| 39 /* Comment out all this code if we are using the GNU C Library, and are not | |
| 40 actually compiling the library itself. This code is part of the GNU C | |
| 41 Library, but also included in many other GNU distributions. Compiling | |
| 42 and linking in this code is a waste when using the GNU C library | |
| 43 (especially if it is a shared library). Rather than having every GNU | |
| 44 program understand `configure --with-gnu-libc' and omit the object files, | |
| 45 it is simpler to just do this in the source for each such file. */ | |
| 46 | |
| 47 #define GETOPT_INTERFACE_VERSION 2 | |
| 48 #if !defined (_LIBC) && defined (__GLIBC__) && __GLIBC__ >= 2 | |
| 49 #include <gnu-versions.h> | |
| 50 #if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION | |
| 51 #define ELIDE_CODE | |
| 52 #endif | |
| 53 #endif | |
| 54 | |
| 55 #ifndef ELIDE_CODE | |
| 56 | |
| 57 | |
| 58 /* This needs to come after some library #include | |
| 59 to get __GNU_LIBRARY__ defined. */ | |
| 60 #ifdef __GNU_LIBRARY__ | |
| 61 /* Don't include stdlib.h for non-GNU C libraries because some of them | |
| 62 contain conflicting prototypes for getopt. */ | |
| 63 #include <stdlib.h> | |
| 64 #include <unistd.h> | |
| 65 #endif /* GNU C library. */ | |
| 66 | |
| 67 #ifdef VMS | |
| 68 #include <unixlib.h> | |
| 69 #if HAVE_STRING_H - 0 | |
| 70 #include <string.h> | |
| 71 #endif | |
| 72 #endif | |
| 73 | |
| 442 | 74 #if defined (WIN32_NATIVE) && !defined (CYGWIN) |
| 428 | 75 /* It's not Unix, really. See? Capital letters. */ |
| 76 #include <windows.h> | |
| 77 #undef getpid | |
| 78 #define getpid() GetCurrentProcessId() | |
| 79 #endif | |
| 80 | |
| 81 #ifndef _ | |
| 82 /* This is for other GNU distributions with internationalized messages. | |
| 83 When compiling libc, the _ macro is predefined. */ | |
| 84 #ifdef HAVE_LIBINTL_H | |
| 85 # include <libintl.h> | |
| 86 # define _(msgid) gettext (msgid) | |
| 87 #else | |
| 88 # define _(msgid) (msgid) | |
| 89 #endif | |
| 90 #endif | |
| 91 | |
| 92 /* This version of `getopt' appears to the caller like standard Unix `getopt' | |
| 93 but it behaves differently for the user, since it allows the user | |
| 94 to intersperse the options with the other arguments. | |
| 95 | |
| 96 As `getopt' works, it permutes the elements of ARGV so that, | |
| 97 when it is done, all the options precede everything else. Thus | |
| 98 all application programs are extended to handle flexible argument order. | |
| 99 | |
| 100 Setting the environment variable POSIXLY_CORRECT disables permutation. | |
| 101 Then the behavior is completely standard. | |
| 102 | |
| 103 GNU application programs can use a third alternative mode in which | |
| 104 they can distinguish the relative order of options and other arguments. */ | |
| 105 | |
| 106 #include "getopt.h" | |
| 107 | |
| 108 /* For communication from `getopt' to the caller. | |
| 109 When `getopt' finds an option that takes an argument, | |
| 110 the argument value is returned here. | |
| 111 Also, when `ordering' is RETURN_IN_ORDER, | |
| 112 each non-option ARGV-element is returned here. */ | |
| 113 | |
| 114 char *optarg = NULL; | |
| 115 | |
| 116 /* Index in ARGV of the next element to be scanned. | |
| 117 This is used for communication to and from the caller | |
| 118 and for communication between successive calls to `getopt'. | |
| 119 | |
| 120 On entry to `getopt', zero means this is the first call; initialize. | |
| 121 | |
| 122 When `getopt' returns -1, this is the index of the first of the | |
| 123 non-option elements that the caller should itself scan. | |
| 124 | |
| 125 Otherwise, `optind' communicates from one call to the next | |
| 126 how much of ARGV has been scanned so far. */ | |
| 127 | |
| 128 /* 1003.2 says this must be 1 before any call. */ | |
| 129 int optind = 1; | |
| 130 | |
| 131 /* Formerly, initialization of getopt depended on optind==0, which | |
| 132 causes problems with re-calling getopt as programs generally don't | |
| 133 know that. */ | |
| 134 | |
| 135 int __getopt_initialized = 0; | |
| 136 | |
| 137 /* The next char to be scanned in the option-element | |
| 138 in which the last option character we returned was found. | |
| 139 This allows us to pick up the scan where we left off. | |
| 140 | |
| 141 If this is zero, or a null string, it means resume the scan | |
| 142 by advancing to the next ARGV-element. */ | |
| 143 | |
| 144 static char *nextchar; | |
| 145 | |
| 146 /* Callers store zero here to inhibit the error message | |
| 147 for unrecognized options. */ | |
| 148 | |
| 149 int opterr = 1; | |
| 150 | |
| 151 /* Set to an option character which was unrecognized. | |
| 152 This must be initialized on some systems to avoid linking in the | |
| 153 system's own getopt implementation. */ | |
| 154 | |
| 155 int optopt = '?'; | |
| 156 | |
| 157 /* Describe how to deal with options that follow non-option ARGV-elements. | |
| 158 | |
| 159 If the caller did not specify anything, | |
| 160 the default is REQUIRE_ORDER if the environment variable | |
| 161 POSIXLY_CORRECT is defined, PERMUTE otherwise. | |
| 162 | |
| 163 REQUIRE_ORDER means don't recognize them as options; | |
| 164 stop option processing when the first non-option is seen. | |
| 165 This is what Unix does. | |
| 166 This mode of operation is selected by either setting the environment | |
| 167 variable POSIXLY_CORRECT, or using `+' as the first character | |
| 168 of the list of option characters. | |
| 169 | |
| 170 PERMUTE is the default. We permute the contents of ARGV as we scan, | |
| 171 so that eventually all the non-options are at the end. This allows options | |
| 172 to be given in any order, even with programs that were not written to | |
| 173 expect this. | |
| 174 | |
| 175 RETURN_IN_ORDER is an option available to programs that were written | |
| 176 to expect options and other ARGV-elements in any order and that care about | |
| 177 the ordering of the two. We describe each non-option ARGV-element | |
| 178 as if it were the argument of an option with character code 1. | |
| 179 Using `-' as the first character of the list of option characters | |
| 180 selects this mode of operation. | |
| 181 | |
| 182 The special argument `--' forces an end of option-scanning regardless | |
| 183 of the value of `ordering'. In the case of RETURN_IN_ORDER, only | |
| 184 `--' can cause `getopt' to return -1 with `optind' != ARGC. */ | |
| 185 | |
| 186 static enum | |
| 187 { | |
| 188 REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER | |
| 189 } ordering; | |
| 190 | |
| 191 /* Value of POSIXLY_CORRECT environment variable. */ | |
| 192 static char *posixly_correct; | |
| 193 | |
| 194 #ifdef __GNU_LIBRARY__ | |
| 195 /* We want to avoid inclusion of string.h with non-GNU libraries | |
| 196 because there are many ways it can cause trouble. | |
| 197 On some systems, it contains special magic macros that don't work | |
| 198 in GCC. */ | |
| 199 #include <string.h> | |
| 200 #define my_index strchr | |
| 201 #else | |
| 202 | |
| 203 static char * | |
| 204 my_index (const char *str, int chr) | |
| 205 { | |
| 206 while (*str) | |
| 207 { | |
| 208 if (*str == chr) | |
| 209 return (char *) str; | |
| 210 str++; | |
| 211 } | |
| 212 return 0; | |
| 213 } | |
| 214 | |
| 215 /* If using GCC, we can safely declare strlen this way. | |
| 216 If not using GCC, it is ok not to declare it. */ | |
| 217 #ifdef __GNUC__ | |
| 218 /* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h. | |
| 219 That was relevant to code that was here before. */ | |
| 220 #if !defined (__STDC__) || !__STDC__ | |
| 221 /* gcc with -traditional declares the built-in strlen to return int, | |
| 222 and has done so at least since version 2.4.5. -- rms. */ | |
| 223 extern int strlen (const char *); | |
| 224 #endif /* not __STDC__ */ | |
| 225 #endif /* __GNUC__ */ | |
| 226 | |
| 227 #endif /* not __GNU_LIBRARY__ */ | |
| 228 | |
| 229 /* Handle permutation of arguments. */ | |
| 230 | |
| 231 /* Describe the part of ARGV that contains non-options that have | |
| 232 been skipped. `first_nonopt' is the index in ARGV of the first of them; | |
| 233 `last_nonopt' is the index after the last of them. */ | |
| 234 | |
| 235 static int first_nonopt; | |
| 236 static int last_nonopt; | |
| 237 | |
| 238 #ifdef _LIBC | |
| 239 /* Bash 2.0 gives us an environment variable containing flags | |
| 240 indicating ARGV elements that should not be considered arguments. */ | |
| 241 | |
| 242 /* Defined in getopt_init.c */ | |
| 243 extern char *__getopt_nonoption_flags; | |
| 244 | |
| 245 static int nonoption_flags_max_len; | |
| 246 static int nonoption_flags_len; | |
| 247 | |
| 248 static int original_argc; | |
| 249 static char *const *original_argv; | |
| 250 | |
| 251 extern pid_t __libc_pid; | |
| 252 | |
| 253 /* Make sure the environment variable bash 2.0 puts in the environment | |
| 254 is valid for the getopt call we must make sure that the ARGV passed | |
| 255 to getopt is that one passed to the process. */ | |
| 256 static void | |
| 257 __attribute__ ((unused)) | |
| 258 store_args_and_env (int argc, char *const *argv) | |
| 259 { | |
| 260 /* XXX This is no good solution. We should rather copy the args so | |
| 261 that we can compare them later. But we must not use malloc(3). */ | |
| 262 original_argc = argc; | |
| 263 original_argv = argv; | |
| 264 } | |
| 265 text_set_element (__libc_subinit, store_args_and_env); | |
| 266 | |
| 267 # define SWAP_FLAGS(ch1, ch2) \ | |
| 268 if (nonoption_flags_len > 0) \ | |
| 269 { \ | |
| 270 char __tmp = __getopt_nonoption_flags[ch1]; \ | |
| 271 __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \ | |
| 272 __getopt_nonoption_flags[ch2] = __tmp; \ | |
| 273 } | |
| 274 #else /* !_LIBC */ | |
| 275 # define SWAP_FLAGS(ch1, ch2) | |
| 276 #endif /* _LIBC */ | |
| 277 | |
| 278 /* Exchange two adjacent subsequences of ARGV. | |
| 279 One subsequence is elements [first_nonopt,last_nonopt) | |
| 280 which contains all the non-options that have been skipped so far. | |
| 281 The other is elements [last_nonopt,optind), which contains all | |
| 282 the options processed since those non-options were skipped. | |
| 283 | |
| 284 `first_nonopt' and `last_nonopt' are relocated so that they describe | |
| 285 the new indices of the non-options in ARGV after they are moved. */ | |
| 286 | |
| 287 #if defined (__STDC__) && __STDC__ | |
| 288 static void exchange (char **); | |
| 289 #endif | |
| 290 | |
| 291 static void | |
| 292 exchange (char **argv) | |
| 293 { | |
| 294 int bottom = first_nonopt; | |
| 295 int middle = last_nonopt; | |
| 296 int top = optind; | |
| 297 char *tem; | |
| 298 | |
| 299 /* Exchange the shorter segment with the far end of the longer segment. | |
| 300 That puts the shorter segment into the right place. | |
| 301 It leaves the longer segment in the right place overall, | |
| 302 but it consists of two parts that need to be swapped next. */ | |
| 303 | |
| 304 #ifdef _LIBC | |
| 305 /* First make sure the handling of the `__getopt_nonoption_flags' | |
| 306 string can work normally. Our top argument must be in the range | |
| 307 of the string. */ | |
| 308 if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len) | |
| 309 { | |
| 310 /* We must extend the array. The user plays games with us and | |
| 311 presents new arguments. */ | |
| 312 char *new_str = malloc (top + 1); | |
| 313 if (new_str == NULL) | |
| 314 nonoption_flags_len = nonoption_flags_max_len = 0; | |
| 315 else | |
| 316 { | |
| 317 memcpy (new_str, __getopt_nonoption_flags, nonoption_flags_max_len); | |
| 318 memset (&new_str[nonoption_flags_max_len], '\0', | |
| 319 top + 1 - nonoption_flags_max_len); | |
| 320 nonoption_flags_max_len = top + 1; | |
| 321 __getopt_nonoption_flags = new_str; | |
| 322 } | |
| 323 } | |
| 324 #endif | |
| 325 | |
| 326 while (top > middle && middle > bottom) | |
| 327 { | |
| 328 if (top - middle > middle - bottom) | |
| 329 { | |
| 330 /* Bottom segment is the short one. */ | |
| 331 int len = middle - bottom; | |
| 332 register int i; | |
| 333 | |
| 334 /* Swap it with the top part of the top segment. */ | |
| 335 for (i = 0; i < len; i++) | |
| 336 { | |
| 337 tem = argv[bottom + i]; | |
| 338 argv[bottom + i] = argv[top - (middle - bottom) + i]; | |
| 339 argv[top - (middle - bottom) + i] = tem; | |
| 340 SWAP_FLAGS (bottom + i, top - (middle - bottom) + i); | |
| 341 } | |
| 342 /* Exclude the moved bottom segment from further swapping. */ | |
| 343 top -= len; | |
| 344 } | |
| 345 else | |
| 346 { | |
| 347 /* Top segment is the short one. */ | |
| 348 int len = top - middle; | |
| 349 register int i; | |
| 350 | |
| 351 /* Swap it with the bottom part of the bottom segment. */ | |
| 352 for (i = 0; i < len; i++) | |
| 353 { | |
| 354 tem = argv[bottom + i]; | |
| 355 argv[bottom + i] = argv[middle + i]; | |
| 356 argv[middle + i] = tem; | |
| 357 SWAP_FLAGS (bottom + i, middle + i); | |
| 358 } | |
| 359 /* Exclude the moved top segment from further swapping. */ | |
| 360 bottom += len; | |
| 361 } | |
| 362 } | |
| 363 | |
| 364 /* Update records for the slots the non-options now occupy. */ | |
| 365 | |
| 366 first_nonopt += (optind - last_nonopt); | |
| 367 last_nonopt = optind; | |
| 368 } | |
| 369 | |
| 370 /* Initialize the internal data when the first call is made. */ | |
| 371 | |
| 372 #if defined (__STDC__) && __STDC__ | |
| 373 static const char *_getopt_initialize (int, char *const *, const char *); | |
| 374 #endif | |
| 375 static const char * | |
| 376 _getopt_initialize (int argc, char *const *argv, const char *optstring) | |
| 377 { | |
| 378 /* Start processing options with ARGV-element 1 (since ARGV-element 0 | |
| 379 is the program name); the sequence of previously skipped | |
| 380 non-option ARGV-elements is empty. */ | |
| 381 | |
| 382 first_nonopt = last_nonopt = optind; | |
| 383 | |
| 384 nextchar = NULL; | |
| 385 | |
| 386 posixly_correct = getenv ("POSIXLY_CORRECT"); | |
| 387 | |
| 388 /* Determine how to handle the ordering of options and nonoptions. */ | |
| 389 | |
| 390 if (optstring[0] == '-') | |
| 391 { | |
| 392 ordering = RETURN_IN_ORDER; | |
| 393 ++optstring; | |
| 394 } | |
| 395 else if (optstring[0] == '+') | |
| 396 { | |
| 397 ordering = REQUIRE_ORDER; | |
| 398 ++optstring; | |
| 399 } | |
| 400 else if (posixly_correct != NULL) | |
| 401 ordering = REQUIRE_ORDER; | |
| 402 else | |
| 403 ordering = PERMUTE; | |
| 404 | |
| 405 #ifdef _LIBC | |
| 406 if (posixly_correct == NULL | |
| 407 && argc == original_argc && argv == original_argv) | |
| 408 { | |
| 409 if (nonoption_flags_max_len == 0) | |
| 410 { | |
| 411 if (__getopt_nonoption_flags == NULL | |
| 412 || __getopt_nonoption_flags[0] == '\0') | |
| 413 nonoption_flags_max_len = -1; | |
| 414 else | |
| 415 { | |
| 416 const char *orig_str = __getopt_nonoption_flags; | |
| 417 int len = nonoption_flags_max_len = strlen (orig_str); | |
| 418 if (nonoption_flags_max_len < argc) | |
| 419 nonoption_flags_max_len = argc; | |
| 420 __getopt_nonoption_flags = | |
| 421 (char *) malloc (nonoption_flags_max_len); | |
| 422 if (__getopt_nonoption_flags == NULL) | |
| 423 nonoption_flags_max_len = -1; | |
| 424 else | |
| 425 { | |
| 426 memcpy (__getopt_nonoption_flags, orig_str, len); | |
| 427 memset (&__getopt_nonoption_flags[len], '\0', | |
| 428 nonoption_flags_max_len - len); | |
| 429 } | |
| 430 } | |
| 431 } | |
| 432 nonoption_flags_len = nonoption_flags_max_len; | |
| 433 } | |
| 434 else | |
| 435 nonoption_flags_len = 0; | |
| 436 #endif | |
| 437 | |
| 438 return optstring; | |
| 439 } | |
| 440 | |
| 441 /* Scan elements of ARGV (whose length is ARGC) for option characters | |
| 442 given in OPTSTRING. | |
| 443 | |
| 444 If an element of ARGV starts with '-', and is not exactly "-" or "--", | |
| 445 then it is an option element. The characters of this element | |
| 446 (aside from the initial '-') are option characters. If `getopt' | |
| 447 is called repeatedly, it returns successively each of the option characters | |
| 448 from each of the option elements. | |
| 449 | |
| 450 If `getopt' finds another option character, it returns that character, | |
| 451 updating `optind' and `nextchar' so that the next call to `getopt' can | |
| 452 resume the scan with the following option character or ARGV-element. | |
| 453 | |
| 454 If there are no more option characters, `getopt' returns -1. | |
| 455 Then `optind' is the index in ARGV of the first ARGV-element | |
| 456 that is not an option. (The ARGV-elements have been permuted | |
| 457 so that those that are not options now come last.) | |
| 458 | |
| 459 OPTSTRING is a string containing the legitimate option characters. | |
| 460 If an option character is seen that is not listed in OPTSTRING, | |
| 461 return '?' after printing an error message. If you set `opterr' to | |
| 462 zero, the error message is suppressed but we still return '?'. | |
| 463 | |
| 464 If a char in OPTSTRING is followed by a colon, that means it wants an arg, | |
| 465 so the following text in the same ARGV-element, or the text of the following | |
| 466 ARGV-element, is returned in `optarg'. Two colons mean an option that | |
| 467 wants an optional arg; if there is text in the current ARGV-element, | |
| 468 it is returned in `optarg', otherwise `optarg' is set to zero. | |
| 469 | |
| 470 If OPTSTRING starts with `-' or `+', it requests different methods of | |
| 471 handling the non-option ARGV-elements. | |
| 472 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above. | |
| 473 | |
| 474 Long-named options begin with `--' instead of `-'. | |
| 475 Their names may be abbreviated as long as the abbreviation is unique | |
| 476 or is an exact match for some defined option. If they have an | |
| 477 argument, it follows the option name in the same ARGV-element, separated | |
| 478 from the option name by a `=', or else the in next ARGV-element. | |
| 479 When `getopt' finds a long-named option, it returns 0 if that option's | |
| 480 `flag' field is nonzero, the value of the option's `val' field | |
| 481 if the `flag' field is zero. | |
| 482 | |
| 483 The elements of ARGV aren't really const, because we permute them. | |
| 484 But we pretend they're const in the prototype to be compatible | |
| 485 with other systems. | |
| 486 | |
| 487 LONGOPTS is a vector of `struct option' terminated by an | |
| 488 element containing a name which is zero. | |
| 489 | |
| 490 LONGIND returns the index in LONGOPT of the long-named option found. | |
| 491 It is only valid when a long-named option has been found by the most | |
| 492 recent call. | |
| 493 | |
| 494 If LONG_ONLY is nonzero, '-' as well as '--' can introduce | |
| 495 long-named options. */ | |
| 496 | |
| 497 int | |
| 498 _getopt_internal (int argc, char *const *argv, const char *optstring, | |
| 499 const struct option *longopts, int *longind, int long_only) | |
| 500 { | |
| 501 optarg = NULL; | |
| 502 | |
| 503 if (optind == 0 || !__getopt_initialized) | |
| 504 { | |
| 505 if (optind == 0) | |
| 506 optind = 1; /* Don't scan ARGV[0], the program name. */ | |
| 507 optstring = _getopt_initialize (argc, argv, optstring); | |
| 508 __getopt_initialized = 1; | |
| 509 } | |
| 510 | |
| 511 /* Test whether ARGV[optind] points to a non-option argument. | |
| 512 Either it does not have option syntax, or there is an environment flag | |
| 513 from the shell indicating it is not an option. The later information | |
| 514 is only used when the used in the GNU libc. */ | |
| 515 #ifdef _LIBC | |
| 516 #define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \ | |
| 517 || (optind < nonoption_flags_len \ | |
| 518 && __getopt_nonoption_flags[optind] == '1')) | |
| 519 #else | |
| 520 #define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0') | |
| 521 #endif | |
| 522 | |
| 523 if (nextchar == NULL || *nextchar == '\0') | |
| 524 { | |
| 525 /* Advance to the next ARGV-element. */ | |
| 526 | |
| 527 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been | |
| 528 moved back by the user (who may also have changed the arguments). */ | |
| 529 if (last_nonopt > optind) | |
| 530 last_nonopt = optind; | |
| 531 if (first_nonopt > optind) | |
| 532 first_nonopt = optind; | |
| 533 | |
| 534 if (ordering == PERMUTE) | |
| 535 { | |
| 536 /* If we have just processed some options following some non-options, | |
| 537 exchange them so that the options come first. */ | |
| 538 | |
| 539 if (first_nonopt != last_nonopt && last_nonopt != optind) | |
| 540 exchange ((char **) argv); | |
| 541 else if (last_nonopt != optind) | |
| 542 first_nonopt = optind; | |
| 543 | |
| 544 /* Skip any additional non-options | |
| 545 and extend the range of non-options previously skipped. */ | |
| 546 | |
| 547 while (optind < argc && NONOPTION_P) | |
| 548 optind++; | |
| 549 last_nonopt = optind; | |
| 550 } | |
| 551 | |
| 552 /* The special ARGV-element `--' means premature end of options. | |
| 553 Skip it like a null option, | |
| 554 then exchange with previous non-options as if it were an option, | |
| 555 then skip everything else like a non-option. */ | |
| 556 | |
| 557 if (optind != argc && !strcmp (argv[optind], "--")) | |
| 558 { | |
| 559 optind++; | |
| 560 | |
| 561 if (first_nonopt != last_nonopt && last_nonopt != optind) | |
| 562 exchange ((char **) argv); | |
| 563 else if (first_nonopt == last_nonopt) | |
| 564 first_nonopt = optind; | |
| 565 last_nonopt = argc; | |
| 566 | |
| 567 optind = argc; | |
| 568 } | |
| 569 | |
| 570 /* If we have done all the ARGV-elements, stop the scan | |
| 571 and back over any non-options that we skipped and permuted. */ | |
| 572 | |
| 573 if (optind == argc) | |
| 574 { | |
| 575 /* Set the next-arg-index to point at the non-options | |
| 576 that we previously skipped, so the caller will digest them. */ | |
| 577 if (first_nonopt != last_nonopt) | |
| 578 optind = first_nonopt; | |
| 579 return -1; | |
| 580 } | |
| 581 | |
| 582 /* If we have come to a non-option and did not permute it, | |
| 583 either stop the scan or describe it to the caller and pass it by. */ | |
| 584 | |
| 585 if (NONOPTION_P) | |
| 586 { | |
| 587 if (ordering == REQUIRE_ORDER) | |
| 588 return -1; | |
| 589 optarg = argv[optind++]; | |
| 590 return 1; | |
| 591 } | |
| 592 | |
| 593 /* We have found another option-ARGV-element. | |
| 594 Skip the initial punctuation. */ | |
| 595 | |
| 596 nextchar = (argv[optind] + 1 | |
| 597 + (longopts != NULL && argv[optind][1] == '-')); | |
| 598 } | |
| 599 | |
| 600 /* Decode the current option-ARGV-element. */ | |
| 601 | |
| 602 /* Check whether the ARGV-element is a long option. | |
| 603 | |
| 604 If long_only and the ARGV-element has the form "-f", where f is | |
| 605 a valid short option, don't consider it an abbreviated form of | |
| 606 a long option that starts with f. Otherwise there would be no | |
| 607 way to give the -f short option. | |
| 608 | |
| 609 On the other hand, if there's a long option "fubar" and | |
| 610 the ARGV-element is "-fu", do consider that an abbreviation of | |
| 611 the long option, just like "--fu", and not "-f" with arg "u". | |
| 612 | |
| 613 This distinction seems to be the most useful approach. */ | |
| 614 | |
| 615 if (longopts != NULL | |
| 616 && (argv[optind][1] == '-' | |
| 617 || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1]))))) | |
| 618 { | |
| 619 char *nameend; | |
| 620 const struct option *p; | |
| 621 const struct option *pfound = NULL; | |
| 622 int exact = 0; | |
| 623 int ambig = 0; | |
| 624 int indfound = -1; | |
| 625 int option_index; | |
| 626 | |
| 627 for (nameend = nextchar; *nameend && *nameend != '='; nameend++) | |
| 628 /* Do nothing. */ ; | |
| 629 | |
| 630 /* Test all long options for either exact match | |
| 631 or abbreviated matches. */ | |
| 632 for (p = longopts, option_index = 0; p->name; p++, option_index++) | |
| 633 if (!strncmp (p->name, nextchar, nameend - nextchar)) | |
| 634 { | |
| 635 if ((unsigned int) (nameend - nextchar) | |
| 636 == (unsigned int) strlen (p->name)) | |
| 637 { | |
| 638 /* Exact match found. */ | |
| 639 pfound = p; | |
| 640 indfound = option_index; | |
| 641 exact = 1; | |
| 642 break; | |
| 643 } | |
| 644 else if (pfound == NULL) | |
| 645 { | |
| 646 /* First nonexact match found. */ | |
| 647 pfound = p; | |
| 648 indfound = option_index; | |
| 649 } | |
| 650 else | |
| 651 /* Second or later nonexact match found. */ | |
| 652 ambig = 1; | |
| 653 } | |
| 654 | |
| 655 if (ambig && !exact) | |
| 656 { | |
| 657 if (opterr) | |
| 658 fprintf (stderr, _("%s: option `%s' is ambiguous\n"), | |
| 659 argv[0], argv[optind]); | |
| 660 nextchar += strlen (nextchar); | |
| 661 optind++; | |
| 662 optopt = 0; | |
| 663 return '?'; | |
| 664 } | |
| 665 | |
| 666 if (pfound != NULL) | |
| 667 { | |
| 668 option_index = indfound; | |
| 669 optind++; | |
| 670 if (*nameend) | |
| 671 { | |
| 672 /* Don't test has_arg with >, because some C compilers don't | |
| 673 allow it to be used on enums. */ | |
| 674 if (pfound->has_arg) | |
| 675 optarg = nameend + 1; | |
| 676 else | |
| 677 { | |
| 678 if (opterr) { | |
| 679 if (argv[optind - 1][1] == '-') | |
| 680 /* --option */ | |
| 681 fprintf (stderr, | |
| 682 _("%s: option `--%s' doesn't allow an argument\n"), | |
| 683 argv[0], pfound->name); | |
| 684 else | |
| 685 /* +option or -option */ | |
| 686 fprintf (stderr, | |
| 687 _("%s: option `%c%s' doesn't allow an argument\n"), | |
| 688 argv[0], argv[optind - 1][0], pfound->name); | |
| 689 } | |
| 690 nextchar += strlen (nextchar); | |
| 691 | |
| 692 optopt = pfound->val; | |
| 693 return '?'; | |
| 694 } | |
| 695 } | |
| 696 else if (pfound->has_arg == 1) | |
| 697 { | |
| 698 if (optind < argc) | |
| 699 optarg = argv[optind++]; | |
| 700 else | |
| 701 { | |
| 702 if (opterr) | |
| 703 fprintf (stderr, | |
| 704 _("%s: option `%s' requires an argument\n"), | |
| 705 argv[0], argv[optind - 1]); | |
| 706 nextchar += strlen (nextchar); | |
| 707 optopt = pfound->val; | |
| 708 return optstring[0] == ':' ? ':' : '?'; | |
| 709 } | |
| 710 } | |
| 711 nextchar += strlen (nextchar); | |
| 712 if (longind != NULL) | |
| 713 *longind = option_index; | |
| 714 if (pfound->flag) | |
| 715 { | |
| 716 *(pfound->flag) = pfound->val; | |
| 717 return 0; | |
| 718 } | |
| 719 return pfound->val; | |
| 720 } | |
| 721 | |
| 722 /* Can't find it as a long option. If this is not getopt_long_only, | |
| 723 or the option starts with '--' or is not a valid short | |
| 724 option, then it's an error. | |
| 725 Otherwise interpret it as a short option. */ | |
| 726 if (!long_only || argv[optind][1] == '-' | |
| 727 || my_index (optstring, *nextchar) == NULL) | |
| 728 { | |
| 729 if (opterr) | |
| 730 { | |
| 731 if (argv[optind][1] == '-') | |
| 732 /* --option */ | |
| 733 fprintf (stderr, _("%s: unrecognized option `--%s'\n"), | |
| 734 argv[0], nextchar); | |
| 735 else | |
| 736 /* +option or -option */ | |
| 737 fprintf (stderr, _("%s: unrecognized option `%c%s'\n"), | |
| 738 argv[0], argv[optind][0], nextchar); | |
| 739 } | |
| 740 nextchar = (char *) ""; | |
| 741 optind++; | |
| 742 optopt = 0; | |
| 743 return '?'; | |
| 744 } | |
| 745 } | |
| 746 | |
| 747 /* Look at and handle the next short option-character. */ | |
| 748 | |
| 749 { | |
| 750 char c = *nextchar++; | |
| 751 char *temp = my_index (optstring, c); | |
| 752 | |
| 753 /* Increment `optind' when we start to process its last character. */ | |
| 754 if (*nextchar == '\0') | |
| 755 ++optind; | |
| 756 | |
| 757 if (temp == NULL || c == ':') | |
| 758 { | |
| 759 if (opterr) | |
| 760 { | |
| 761 if (posixly_correct) | |
| 762 /* 1003.2 specifies the format of this message. */ | |
| 763 fprintf (stderr, _("%s: illegal option -- %c\n"), | |
| 764 argv[0], c); | |
| 765 else | |
| 766 fprintf (stderr, _("%s: invalid option -- %c\n"), | |
| 767 argv[0], c); | |
| 768 } | |
| 769 optopt = c; | |
| 770 return '?'; | |
| 771 } | |
| 772 /* Convenience. Treat POSIX -W foo same as long option --foo */ | |
| 773 if (temp[0] == 'W' && temp[1] == ';') | |
| 774 { | |
| 775 char *nameend; | |
| 776 const struct option *p; | |
| 777 const struct option *pfound = NULL; | |
| 778 int exact = 0; | |
| 779 int ambig = 0; | |
| 780 int indfound = 0; | |
| 781 int option_index; | |
| 782 | |
| 783 /* This is an option that requires an argument. */ | |
| 784 if (*nextchar != '\0') | |
| 785 { | |
| 786 optarg = nextchar; | |
| 787 /* If we end this ARGV-element by taking the rest as an arg, | |
| 788 we must advance to the next element now. */ | |
| 789 optind++; | |
| 790 } | |
| 791 else if (optind == argc) | |
| 792 { | |
| 793 if (opterr) | |
| 794 { | |
| 795 /* 1003.2 specifies the format of this message. */ | |
| 796 fprintf (stderr, _("%s: option requires an argument -- %c\n"), | |
| 797 argv[0], c); | |
| 798 } | |
| 799 optopt = c; | |
| 800 if (optstring[0] == ':') | |
| 801 c = ':'; | |
| 802 else | |
| 803 c = '?'; | |
| 804 return c; | |
| 805 } | |
| 806 else | |
| 807 /* We already incremented `optind' once; | |
| 808 increment it again when taking next ARGV-elt as argument. */ | |
| 809 optarg = argv[optind++]; | |
| 810 | |
| 811 /* optarg is now the argument, see if it's in the | |
| 812 table of longopts. */ | |
| 813 | |
| 814 for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++) | |
| 815 /* Do nothing. */ ; | |
| 816 | |
| 817 /* Test all long options for either exact match | |
| 818 or abbreviated matches. */ | |
| 819 for (p = longopts, option_index = 0; p->name; p++, option_index++) | |
| 820 if (!strncmp (p->name, nextchar, nameend - nextchar)) | |
| 821 { | |
| 822 if ((unsigned int) (nameend - nextchar) == strlen (p->name)) | |
| 823 { | |
| 824 /* Exact match found. */ | |
| 825 pfound = p; | |
| 826 indfound = option_index; | |
| 827 exact = 1; | |
| 828 break; | |
| 829 } | |
| 830 else if (pfound == NULL) | |
| 831 { | |
| 832 /* First nonexact match found. */ | |
| 833 pfound = p; | |
| 834 indfound = option_index; | |
| 835 } | |
| 836 else | |
| 837 /* Second or later nonexact match found. */ | |
| 838 ambig = 1; | |
| 839 } | |
| 840 if (ambig && !exact) | |
| 841 { | |
| 842 if (opterr) | |
| 843 fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"), | |
| 844 argv[0], argv[optind]); | |
| 845 nextchar += strlen (nextchar); | |
| 846 optind++; | |
| 847 return '?'; | |
| 848 } | |
| 849 if (pfound != NULL) | |
| 850 { | |
| 851 option_index = indfound; | |
| 852 if (*nameend) | |
| 853 { | |
| 854 /* Don't test has_arg with >, because some C compilers don't | |
| 855 allow it to be used on enums. */ | |
| 856 if (pfound->has_arg) | |
| 857 optarg = nameend + 1; | |
| 858 else | |
| 859 { | |
| 860 if (opterr) | |
| 861 fprintf (stderr, _("\ | |
| 862 %s: option `-W %s' doesn't allow an argument\n"), | |
| 863 argv[0], pfound->name); | |
| 864 | |
| 865 nextchar += strlen (nextchar); | |
| 866 return '?'; | |
| 867 } | |
| 868 } | |
| 869 else if (pfound->has_arg == 1) | |
| 870 { | |
| 871 if (optind < argc) | |
| 872 optarg = argv[optind++]; | |
| 873 else | |
| 874 { | |
| 875 if (opterr) | |
| 876 fprintf (stderr, | |
| 877 _("%s: option `%s' requires an argument\n"), | |
| 878 argv[0], argv[optind - 1]); | |
| 879 nextchar += strlen (nextchar); | |
| 880 return optstring[0] == ':' ? ':' : '?'; | |
| 881 } | |
| 882 } | |
| 883 nextchar += strlen (nextchar); | |
| 884 if (longind != NULL) | |
| 885 *longind = option_index; | |
| 886 if (pfound->flag) | |
| 887 { | |
| 888 *(pfound->flag) = pfound->val; | |
| 889 return 0; | |
| 890 } | |
| 891 return pfound->val; | |
| 892 } | |
| 893 nextchar = NULL; | |
| 894 return 'W'; /* Let the application handle it. */ | |
| 895 } | |
| 896 if (temp[1] == ':') | |
| 897 { | |
| 898 if (temp[2] == ':') | |
| 899 { | |
| 900 /* This is an option that accepts an argument optionally. */ | |
| 901 if (*nextchar != '\0') | |
| 902 { | |
| 903 optarg = nextchar; | |
| 904 optind++; | |
| 905 } | |
| 906 else | |
| 907 optarg = NULL; | |
| 908 nextchar = NULL; | |
| 909 } | |
| 910 else | |
| 911 { | |
| 912 /* This is an option that requires an argument. */ | |
| 913 if (*nextchar != '\0') | |
| 914 { | |
| 915 optarg = nextchar; | |
| 916 /* If we end this ARGV-element by taking the rest as an arg, | |
| 917 we must advance to the next element now. */ | |
| 918 optind++; | |
| 919 } | |
| 920 else if (optind == argc) | |
| 921 { | |
| 922 if (opterr) | |
| 923 { | |
| 924 /* 1003.2 specifies the format of this message. */ | |
| 925 fprintf (stderr, | |
| 926 _("%s: option requires an argument -- %c\n"), | |
| 927 argv[0], c); | |
| 928 } | |
| 929 optopt = c; | |
| 930 if (optstring[0] == ':') | |
| 931 c = ':'; | |
| 932 else | |
| 933 c = '?'; | |
| 934 } | |
| 935 else | |
| 936 /* We already incremented `optind' once; | |
| 937 increment it again when taking next ARGV-elt as argument. */ | |
| 938 optarg = argv[optind++]; | |
| 939 nextchar = NULL; | |
| 940 } | |
| 941 } | |
| 942 return c; | |
| 943 } | |
| 944 } | |
| 945 | |
| 946 int | |
| 947 getopt (int argc, char *const *argv, const char *optstring) | |
| 948 { | |
| 949 return _getopt_internal (argc, argv, optstring, | |
| 950 (const struct option *) 0, | |
| 951 (int *) 0, | |
| 952 0); | |
| 953 } | |
| 954 | |
| 955 #endif /* Not ELIDE_CODE. */ | |
| 956 | |
| 957 #ifdef TEST | |
| 958 | |
| 959 /* Compile with -DTEST to make an executable for use in testing | |
| 960 the above definition of `getopt'. */ | |
| 961 | |
| 962 int | |
| 963 main (int argc, char **argv) | |
| 964 { | |
| 965 int c; | |
| 966 int digit_optind = 0; | |
| 967 | |
| 968 while (1) | |
| 969 { | |
| 970 int this_option_optind = optind ? optind : 1; | |
| 971 | |
| 972 c = getopt (argc, argv, "abc:d:0123456789"); | |
| 973 if (c == -1) | |
| 974 break; | |
| 975 | |
| 976 switch (c) | |
| 977 { | |
| 978 case '0': | |
| 979 case '1': | |
| 980 case '2': | |
| 981 case '3': | |
| 982 case '4': | |
| 983 case '5': | |
| 984 case '6': | |
| 985 case '7': | |
| 986 case '8': | |
| 987 case '9': | |
| 988 if (digit_optind != 0 && digit_optind != this_option_optind) | |
| 989 printf ("digits occur in two different argv-elements.\n"); | |
| 990 digit_optind = this_option_optind; | |
| 991 printf ("option %c\n", c); | |
| 992 break; | |
| 993 | |
| 994 case 'a': | |
| 995 printf ("option a\n"); | |
| 996 break; | |
| 997 | |
| 998 case 'b': | |
| 999 printf ("option b\n"); | |
| 1000 break; | |
| 1001 | |
| 1002 case 'c': | |
| 1003 printf ("option c with value `%s'\n", optarg); | |
| 1004 break; | |
| 1005 | |
| 1006 case '?': | |
| 1007 break; | |
| 1008 | |
| 1009 default: | |
| 1010 printf ("?? getopt returned character code 0%o ??\n", c); | |
| 1011 } | |
| 1012 } | |
| 1013 | |
| 1014 if (optind < argc) | |
| 1015 { | |
| 1016 printf ("non-option ARGV-elements: "); | |
| 1017 while (optind < argc) | |
| 1018 printf ("%s ", argv[optind++]); | |
| 1019 printf ("\n"); | |
| 1020 } | |
| 1021 | |
| 1022 exit (0); | |
| 1023 } | |
| 1024 | |
| 1025 #endif /* TEST */ |