Alexandre Lision | ddd731e | 2014-01-31 11:50:08 -0500 | [diff] [blame] | 1 | // Copyright (C) 1999-2005 Open Source Telecom Corporation. |
| 2 | // Copyright (C) 2006-2010 David Sugar, Tycho Softworks. |
| 3 | // |
| 4 | // This program is free software; you can redistribute it and/or modify |
| 5 | // it under the terms of the GNU General Public License as published by |
| 6 | // the Free Software Foundation; either version 2 of the License, or |
| 7 | // (at your option) any later version. |
| 8 | // |
| 9 | // This program is distributed in the hope that it will be useful, |
| 10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | // GNU General Public License for more details. |
| 13 | // |
| 14 | // You should have received a copy of the GNU General Public License |
| 15 | // along with this program; if not, write to the Free Software |
| 16 | // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 17 | // |
| 18 | // As a special exception, you may use this file as part of a free software |
| 19 | // library without restriction. Specifically, if other files instantiate |
| 20 | // templates or use macros or inline functions from this file, or you compile |
| 21 | // this file and link it with other files to produce an executable, this |
| 22 | // file does not by itself cause the resulting executable to be covered by |
| 23 | // the GNU General Public License. This exception does not however |
| 24 | // invalidate any other reasons why the executable file might be covered by |
| 25 | // the GNU General Public License. |
| 26 | // |
| 27 | // This exception applies only to the code released under the name GNU |
| 28 | // Common C++. If you copy code from other releases into a copy of GNU |
| 29 | // Common C++, as the General Public License permits, the exception does |
| 30 | // not apply to the code that you add in this way. To avoid misleading |
| 31 | // anyone as to the status of such modified files, you must delete |
| 32 | // this exception notice from them. |
| 33 | // |
| 34 | // If you write modifications of your own for GNU Common C++, it is your choice |
| 35 | // whether to permit this exception to apply to your modifications. |
| 36 | // If you do not wish that, delete this exception notice. |
| 37 | // |
| 38 | |
| 39 | #ifndef _MSC_VER |
| 40 | #include <sys/stat.h> |
| 41 | #endif |
| 42 | |
| 43 | // needed for GNU/LINUX glibc otherwise pread/pwrite wont work |
| 44 | |
| 45 | #ifndef _XOPEN_SOURCE |
| 46 | #define _XOPEN_SOURCE 600 |
| 47 | #endif |
| 48 | |
| 49 | /* |
| 50 | * on old glibc's, this has to be |
| 51 | * defined explicitly |
| 52 | */ |
| 53 | #ifndef _XOPEN_SOURCE_EXTENDED |
| 54 | #define _XOPEN_SOURCE_EXTENDED |
| 55 | #endif |
| 56 | |
| 57 | #include <ucommon-config.h> |
| 58 | #include "commoncpp/missing.h" |
| 59 | |
| 60 | // broken BSD; XOPEN should not imply _POSIX_C_SOURCE, |
| 61 | // _POSIX_C_SOURCE should not stop __BSD_VISIBLE |
| 62 | |
| 63 | #define u_int unsigned int |
| 64 | #define u_short unsigned short |
| 65 | #define u_long unsigned long |
| 66 | #define u_char unsigned char |
| 67 | |
| 68 | #include <fcntl.h> |
| 69 | |
| 70 | #ifdef HAVE_SYS_PARAM_H |
| 71 | #include <sys/param.h> |
| 72 | #endif |
| 73 | |
| 74 | #ifdef HAVE_SYS_FILE_H |
| 75 | #include <sys/file.h> |
| 76 | #endif |
| 77 | |
| 78 | #ifdef HAVE_SYS_LOCKF_H |
| 79 | #include <sys/lockf.h> |
| 80 | #endif |
| 81 | |
| 82 | #include <commoncpp/config.h> |
| 83 | #include <commoncpp/export.h> |
| 84 | #include <commoncpp/exception.h> |
| 85 | #include <commoncpp/thread.h> |
| 86 | #include <commoncpp/process.h> |
| 87 | #include <commoncpp/file.h> |
| 88 | |
| 89 | #ifdef __BORLANDC__ |
| 90 | #include <stdio.h> |
| 91 | #include <stdlib.h> |
| 92 | #else |
| 93 | #include <cstdio> |
| 94 | #include <cstdlib> |
| 95 | #endif |
| 96 | |
| 97 | #include <sys/stat.h> |
| 98 | #include <cerrno> |
| 99 | |
| 100 | #ifndef _MSWINDOWS_ |
| 101 | |
| 102 | #ifdef COMMON_AIX_FIXES |
| 103 | #undef LOCK_EX |
| 104 | #undef LOCK_SH |
| 105 | #endif |
| 106 | |
| 107 | #ifdef MACOSX |
| 108 | #define MISSING_LOCKF |
| 109 | #endif |
| 110 | |
| 111 | #ifndef F_LOCK |
| 112 | #define MISSING_LOCKF |
| 113 | |
| 114 | enum { |
| 115 | F_ULOCK = 1, |
| 116 | F_LOCK, |
| 117 | F_TLOCK, |
| 118 | F_TEST |
| 119 | }; |
| 120 | |
| 121 | #endif |
| 122 | |
| 123 | #endif // ndef WIN32 |
| 124 | |
| 125 | #if defined(_OSF_SOURCE) && defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE > 1 |
| 126 | #undef LOCK_EX |
| 127 | #undef LOCK_SH |
| 128 | #endif |
| 129 | |
| 130 | #if 0 |
| 131 | /* |
| 132 | * not used anymore ? (hen) |
| 133 | */ |
| 134 | static const char *clearfile(const char *pathname) |
| 135 | { |
| 136 | remove(pathname); |
| 137 | return pathname; |
| 138 | } |
| 139 | |
| 140 | static const char *clearfifo(const char *pathname, int mode) |
| 141 | { |
| 142 | remove(pathname); |
| 143 | mkfifo(pathname, mode); |
| 144 | return pathname; |
| 145 | } |
| 146 | #endif |
| 147 | |
| 148 | NAMESPACE_COMMONCPP |
| 149 | |
| 150 | RandomFile::RandomFile(const char *name) : Mutex() |
| 151 | { |
| 152 | #ifdef _MSWINDOWS_ |
| 153 | fd = INVALID_HANDLE_VALUE; |
| 154 | // immediate is not defined on Win32 |
| 155 | #else |
| 156 | fd = -1; |
| 157 | flags.immediate = false; |
| 158 | #endif |
| 159 | flags.thrown = flags.initial = flags.temp = false; |
| 160 | flags.count = 0; |
| 161 | pathname = NULL; |
| 162 | } |
| 163 | |
| 164 | RandomFile::RandomFile(const RandomFile &rf) : Mutex() |
| 165 | { |
| 166 | // first, `dup'-licate the file descriptor/handle |
| 167 | #ifdef _MSWINDOWS_ |
| 168 | HANDLE pidHandle = GetCurrentProcess(); |
| 169 | HANDLE dupHandle; |
| 170 | |
| 171 | if(rf.fd != INVALID_HANDLE_VALUE) { |
| 172 | if(!DuplicateHandle(pidHandle, rf.fd, pidHandle, &dupHandle, 0, FALSE, DUPLICATE_SAME_ACCESS)) |
| 173 | fd = INVALID_HANDLE_VALUE; |
| 174 | else |
| 175 | fd = dupHandle; |
| 176 | } |
| 177 | else |
| 178 | fd = INVALID_HANDLE_VALUE; |
| 179 | |
| 180 | #else |
| 181 | if(rf.fd > -1) |
| 182 | fd = dup(rf.fd); |
| 183 | else |
| 184 | fd = -1; |
| 185 | |
| 186 | #endif |
| 187 | |
| 188 | flags = rf.flags; |
| 189 | flags.count = 0; |
| 190 | |
| 191 | if(rf.pathname) |
| 192 | pathname = newString(rf.pathname); |
| 193 | else |
| 194 | pathname = NULL; |
| 195 | } |
| 196 | |
| 197 | RandomFile::~RandomFile() |
| 198 | { |
| 199 | final(); |
| 200 | } |
| 201 | |
| 202 | File::Error RandomFile::restart(void) |
| 203 | { |
| 204 | return errOpenFailed; |
| 205 | } |
| 206 | |
| 207 | File::Attr RandomFile::initialize(void) |
| 208 | { |
| 209 | return attrPublic; |
| 210 | } |
| 211 | |
| 212 | void RandomFile::final(void) |
| 213 | { |
| 214 | #ifdef _MSWINDOWS_ |
| 215 | if(fd != INVALID_HANDLE_VALUE) { |
| 216 | CloseHandle(fd); |
| 217 | if(flags.temp && pathname) |
| 218 | DeleteFile(pathname); |
| 219 | } |
| 220 | |
| 221 | #else |
| 222 | if(fd > -1) { |
| 223 | close(fd); |
| 224 | if(flags.temp && pathname) |
| 225 | remove(pathname); |
| 226 | } |
| 227 | #endif |
| 228 | |
| 229 | if(pathname) { |
| 230 | delString(pathname); |
| 231 | pathname = NULL; |
| 232 | } |
| 233 | |
| 234 | #ifdef _MSWINDOWS_ |
| 235 | fd = INVALID_HANDLE_VALUE; |
| 236 | #else |
| 237 | fd = -1; |
| 238 | #endif |
| 239 | flags.count = 0; |
| 240 | flags.initial = false; |
| 241 | } |
| 242 | |
| 243 | RandomFile::Error RandomFile::error(Error id, char *str) |
| 244 | { |
| 245 | errstr = str; |
| 246 | errid = id; |
| 247 | if(!flags.thrown) { |
| 248 | flags.thrown = true; |
| 249 | #ifdef CCXX_EXCEPTIONS |
| 250 | if(Thread::getException() == Thread::throwObject) |
| 251 | throw(this); |
| 252 | #ifdef COMMON_STD_EXCEPTION |
| 253 | else if(Thread::getException() == Thread::throwException) { |
| 254 | if(!str) |
| 255 | str = (char *)""; |
| 256 | throw FileException(str); |
| 257 | } |
| 258 | #endif |
| 259 | #endif |
| 260 | } |
| 261 | return id; |
| 262 | } |
| 263 | |
| 264 | bool RandomFile::initial(void) |
| 265 | { |
| 266 | bool init; |
| 267 | |
| 268 | #ifdef _MSWINDOWS_ |
| 269 | if(fd == INVALID_HANDLE_VALUE) |
| 270 | #else |
| 271 | if(fd < 0) |
| 272 | #endif |
| 273 | return false; |
| 274 | |
| 275 | enterMutex(); |
| 276 | init = flags.initial; |
| 277 | flags.initial = false; |
| 278 | |
| 279 | if(!init) { |
| 280 | leaveMutex(); |
| 281 | return false; |
| 282 | } |
| 283 | |
| 284 | #ifdef _MSWINDOWS_ |
| 285 | Attr access = initialize(); |
| 286 | if(access == attrInvalid) { |
| 287 | CloseHandle(fd); |
| 288 | if(pathname) |
| 289 | DeleteFile(pathname); |
| 290 | fd = INVALID_HANDLE_VALUE; |
| 291 | leaveMutex(); |
| 292 | error(errInitFailed); |
| 293 | return false; |
| 294 | } |
| 295 | |
| 296 | #else |
| 297 | int mode = (int)initialize(); |
| 298 | if(!mode) { |
| 299 | close(fd); |
| 300 | fd = -1; |
| 301 | if(pathname) |
| 302 | remove(pathname); |
| 303 | leaveMutex(); |
| 304 | error(errInitFailed); |
| 305 | return false; |
| 306 | } |
| 307 | fchmod(fd, mode); |
| 308 | #endif |
| 309 | |
| 310 | leaveMutex(); |
| 311 | return init; |
| 312 | } |
| 313 | |
| 314 | #ifndef _MSWINDOWS_ |
| 315 | RandomFile::Error RandomFile::setCompletion(Complete mode) |
| 316 | { |
| 317 | long flag = fcntl(fd, F_GETFL); |
| 318 | |
| 319 | if(fd < 0) |
| 320 | return errNotOpened; |
| 321 | |
| 322 | flags.immediate = false; |
| 323 | #ifdef O_SYNC |
| 324 | flag &= ~(O_SYNC | O_NONBLOCK); |
| 325 | #else |
| 326 | flag &= ~O_NONBLOCK; |
| 327 | #endif |
| 328 | switch(mode) { |
| 329 | case completionImmediate: |
| 330 | #ifdef O_SYNC |
| 331 | flag |= O_SYNC; |
| 332 | #endif |
| 333 | flags.immediate = true; |
| 334 | break; |
| 335 | |
| 336 | case completionDelayed: |
| 337 | flag |= O_NONBLOCK; |
| 338 | |
| 339 | //completionDeferred: ? (hen) |
| 340 | case completionDeferred: |
| 341 | break; |
| 342 | } |
| 343 | fcntl(fd, F_SETFL, flag); |
| 344 | return errSuccess; |
| 345 | } |
| 346 | #endif |
| 347 | |
| 348 | off_t RandomFile::getCapacity(void) |
| 349 | { |
| 350 | off_t eof, pos = 0; |
| 351 | #ifdef _MSWINDOWS_ |
| 352 | if(!fd) |
| 353 | #else |
| 354 | if(fd < 0) |
| 355 | #endif |
| 356 | return 0; |
| 357 | |
| 358 | enterMutex(); |
| 359 | #ifdef _MSWINDOWS_ |
| 360 | pos = SetFilePointer(fd, 0l, NULL, FILE_CURRENT); |
| 361 | eof = SetFilePointer(fd, 0l, NULL, FILE_END); |
| 362 | SetFilePointer(fd, pos, NULL, FILE_BEGIN); |
| 363 | #else |
| 364 | lseek(fd, pos, SEEK_SET); |
| 365 | pos = lseek(fd, 0l, SEEK_CUR); |
| 366 | eof = lseek(fd, 0l, SEEK_END); |
| 367 | #endif |
| 368 | leaveMutex(); |
| 369 | return eof; |
| 370 | } |
| 371 | |
| 372 | bool RandomFile::operator!(void) |
| 373 | { |
| 374 | #ifdef _MSWINDOWS_ |
| 375 | return fd == INVALID_HANDLE_VALUE; |
| 376 | #else |
| 377 | if(fd < 0) |
| 378 | return true; |
| 379 | |
| 380 | return false; |
| 381 | #endif |
| 382 | } |
| 383 | |
| 384 | SharedFile::SharedFile(const char *path) : |
| 385 | RandomFile(path) |
| 386 | { |
| 387 | fcb.address = NULL; |
| 388 | fcb.len = 0; |
| 389 | fcb.pos = 0; |
| 390 | open(path); |
| 391 | } |
| 392 | |
| 393 | SharedFile::SharedFile(const SharedFile &sh) : |
| 394 | RandomFile(sh) |
| 395 | { |
| 396 | } |
| 397 | |
| 398 | SharedFile::~SharedFile() |
| 399 | { |
| 400 | final(); |
| 401 | } |
| 402 | |
| 403 | SharedFile::Error SharedFile::open(const char *path) |
| 404 | { |
| 405 | #ifdef _MSWINDOWS_ |
| 406 | if(fd != INVALID_HANDLE_VALUE) |
| 407 | #else |
| 408 | if(fd > -1) |
| 409 | #endif |
| 410 | final(); |
| 411 | |
| 412 | if(path != pathname) { |
| 413 | if(pathname) |
| 414 | delString(pathname); |
| 415 | pathname = newString(path); |
| 416 | } |
| 417 | |
| 418 | flags.initial = false; |
| 419 | |
| 420 | #ifdef _MSWINDOWS_ |
| 421 | fd = CreateFile(pathname, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_RANDOM_ACCESS, NULL); |
| 422 | if(fd == INVALID_HANDLE_VALUE) { |
| 423 | flags.initial = true; |
| 424 | fd = CreateFile(pathname, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, CREATE_NEW, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_RANDOM_ACCESS, NULL); |
| 425 | } |
| 426 | if(fd == INVALID_HANDLE_VALUE) |
| 427 | return errOpenFailed; |
| 428 | |
| 429 | return errSuccess; |
| 430 | |
| 431 | #else |
| 432 | fd = ::open(pathname, O_RDWR); |
| 433 | if(fd < 0) { |
| 434 | flags.initial = true; |
| 435 | fd = ::open(pathname, O_CREAT | O_RDWR | O_TRUNC, |
| 436 | (int)attrPrivate); |
| 437 | } |
| 438 | if(fd < 0) |
| 439 | return error(errOpenFailed); |
| 440 | |
| 441 | #ifdef LOCK_SH |
| 442 | if(::flock(fd, LOCK_SH | LOCK_NB)) { |
| 443 | close(fd); |
| 444 | fd = -1; |
| 445 | return error(errOpenInUse); |
| 446 | } |
| 447 | #endif |
| 448 | return errSuccess; |
| 449 | #endif // WIN32 |
| 450 | } |
| 451 | |
| 452 | SharedFile::Error SharedFile::fetch(caddr_t address, ccxx_size_t len, off_t pos) |
| 453 | { |
| 454 | #ifdef _MSWINDOWS_ |
| 455 | if(fd == INVALID_HANDLE_VALUE) |
| 456 | #else |
| 457 | if(fd < 0) |
| 458 | #endif |
| 459 | return errNotOpened; |
| 460 | |
| 461 | enterMutex(); |
| 462 | if(address) |
| 463 | fcb.address = address; |
| 464 | |
| 465 | if(len) |
| 466 | fcb.len = len; |
| 467 | |
| 468 | if(pos != -1) |
| 469 | fcb.pos = pos; |
| 470 | |
| 471 | #ifdef _MSWINDOWS_ |
| 472 | OVERLAPPED over; |
| 473 | SetFilePointer(fd, fcb.pos, NULL, FILE_BEGIN); |
| 474 | over.hEvent = 0; |
| 475 | over.Offset = fcb.pos; |
| 476 | over.OffsetHigh = 0; |
| 477 | LockFileEx(fd, LOCKFILE_EXCLUSIVE_LOCK, 0, fcb.len, 0, &over); |
| 478 | DWORD count; |
| 479 | if(!ReadFile(fd, fcb.address, fcb.len, &count, NULL)) { |
| 480 | leaveMutex(); |
| 481 | return errReadFailure; |
| 482 | } |
| 483 | leaveMutex(); |
| 484 | if(count < fcb.len) |
| 485 | return errReadIncomplete; |
| 486 | |
| 487 | return errSuccess; |
| 488 | |
| 489 | #else |
| 490 | lseek(fd, fcb.pos, SEEK_SET); |
| 491 | if(lockf(fd, F_LOCK, fcb.len)) { |
| 492 | leaveMutex(); |
| 493 | return errLockFailure; |
| 494 | } |
| 495 | |
| 496 | int io = ::read(fd, fcb.address, fcb.len); |
| 497 | leaveMutex(); |
| 498 | |
| 499 | if((size_t) io == fcb.len) |
| 500 | return errSuccess; |
| 501 | |
| 502 | if(io > -1) |
| 503 | return errReadIncomplete; |
| 504 | |
| 505 | switch(errno) { |
| 506 | case EINTR: |
| 507 | return errReadInterrupted; |
| 508 | default: |
| 509 | return errReadFailure; |
| 510 | } |
| 511 | #endif |
| 512 | } |
| 513 | |
| 514 | #ifndef _MSWINDOWS_ |
| 515 | SharedFile::Error SharedFile::clear(ccxx_size_t len, off_t pos) |
| 516 | { |
| 517 | if(fd < 0) |
| 518 | return errNotOpened; |
| 519 | |
| 520 | enterMutex(); |
| 521 | if(len) |
| 522 | fcb.len = len; |
| 523 | |
| 524 | if(pos != -1) |
| 525 | fcb.pos = pos; |
| 526 | |
| 527 | lseek(fd, fcb.pos, SEEK_SET); |
| 528 | if(lockf(fd, F_ULOCK, fcb.len)) { |
| 529 | leaveMutex(); |
| 530 | return errLockFailure; |
| 531 | } |
| 532 | leaveMutex(); |
| 533 | return errSuccess; |
| 534 | } |
| 535 | #endif // ndef WIN32 |
| 536 | |
| 537 | SharedFile::Error SharedFile::update(caddr_t address, ccxx_size_t len, off_t pos) |
| 538 | { |
| 539 | #ifdef _MSWINDOWS_ |
| 540 | if(fd == INVALID_HANDLE_VALUE) |
| 541 | #else |
| 542 | if(fd < 0) |
| 543 | #endif |
| 544 | return errNotOpened; |
| 545 | |
| 546 | enterMutex(); |
| 547 | if(address) |
| 548 | fcb.address = address; |
| 549 | |
| 550 | if(len) |
| 551 | fcb.len = len; |
| 552 | |
| 553 | if(pos != -1) |
| 554 | fcb.pos = pos; |
| 555 | |
| 556 | #ifdef _MSWINDOWS_ |
| 557 | OVERLAPPED over; |
| 558 | SetFilePointer(fd, fcb.pos, NULL, FILE_BEGIN); |
| 559 | over.hEvent = 0; |
| 560 | over.Offset = pos; |
| 561 | over.OffsetHigh = 0; |
| 562 | DWORD count; |
| 563 | if(!WriteFile(fd, fcb.address, fcb.len, &count, NULL)) { |
| 564 | SetFilePointer(fd, fcb.pos, NULL, FILE_CURRENT); |
| 565 | UnlockFileEx(fd, 0, len, 0, &over); |
| 566 | leaveMutex(); |
| 567 | return errWriteFailure; |
| 568 | } |
| 569 | SetFilePointer(fd, fcb.pos, NULL, FILE_CURRENT); |
| 570 | UnlockFileEx(fd, 0, len, 0, &over); |
| 571 | leaveMutex(); |
| 572 | if(count < fcb.len) |
| 573 | return errWriteIncomplete; |
| 574 | |
| 575 | return errSuccess; |
| 576 | |
| 577 | #else |
| 578 | lseek(fd, fcb.pos, SEEK_SET); |
| 579 | int io = ::write(fd, fcb.address, fcb.len); |
| 580 | if(lockf(fd, F_ULOCK, fcb.len)) { |
| 581 | leaveMutex(); |
| 582 | return errLockFailure; |
| 583 | } |
| 584 | leaveMutex(); |
| 585 | |
| 586 | if((size_t) io == fcb.len) |
| 587 | return errSuccess; |
| 588 | |
| 589 | if(io > -1) |
| 590 | return errWriteIncomplete; |
| 591 | |
| 592 | switch(errno) { |
| 593 | case EINTR: |
| 594 | return errWriteInterrupted; |
| 595 | default: |
| 596 | return errWriteFailure; |
| 597 | } |
| 598 | #endif // WIN32 |
| 599 | } |
| 600 | |
| 601 | SharedFile::Error SharedFile::append(caddr_t address, ccxx_size_t len) |
| 602 | { |
| 603 | #ifdef _MSWINDOWS_ |
| 604 | if(fd == INVALID_HANDLE_VALUE) |
| 605 | #else |
| 606 | if(fd < 0) |
| 607 | #endif |
| 608 | return errNotOpened; |
| 609 | |
| 610 | enterMutex(); |
| 611 | if(address) |
| 612 | fcb.address = address; |
| 613 | |
| 614 | if(len) |
| 615 | fcb.len = len; |
| 616 | |
| 617 | #ifdef _MSWINDOWS_ |
| 618 | fcb.pos = SetFilePointer(fd, 0l, NULL, FILE_END); |
| 619 | OVERLAPPED over; |
| 620 | over.hEvent = 0; |
| 621 | over.Offset = fcb.pos; |
| 622 | over.OffsetHigh = 0; |
| 623 | LONG eof = fcb.pos; |
| 624 | LockFileEx(fd, LOCKFILE_EXCLUSIVE_LOCK, 0, 0x7fffffff, 0, &over); |
| 625 | fcb.pos = SetFilePointer(fd, 0l, NULL, FILE_END); |
| 626 | DWORD count; |
| 627 | if(!WriteFile(fd, fcb.address, fcb.len, &count, NULL)) { |
| 628 | SetFilePointer(fd, eof, NULL, FILE_CURRENT); |
| 629 | UnlockFileEx(fd, 0, 0x7fffffff, 0, &over); |
| 630 | leaveMutex(); |
| 631 | return errWriteFailure; |
| 632 | } |
| 633 | SetFilePointer(fd, eof, NULL, FILE_CURRENT); |
| 634 | UnlockFileEx(fd, 0, 0x7fffffff, 0, &over); |
| 635 | leaveMutex(); |
| 636 | if(count < fcb.len) |
| 637 | return errWriteIncomplete; |
| 638 | |
| 639 | return errSuccess; |
| 640 | |
| 641 | #else |
| 642 | fcb.pos = lseek(fd, 0l, SEEK_END); |
| 643 | if(lockf(fd, F_LOCK, -1)) { |
| 644 | leaveMutex(); |
| 645 | return errLockFailure; |
| 646 | } |
| 647 | fcb.pos = lseek(fd, 0l, SEEK_END); |
| 648 | int io = ::write(fd, fcb.address, fcb.len); |
| 649 | lseek(fd, fcb.pos, SEEK_SET); |
| 650 | if(lockf(fd, F_ULOCK, -1)) { |
| 651 | leaveMutex(); |
| 652 | return errLockFailure; |
| 653 | } |
| 654 | leaveMutex(); |
| 655 | |
| 656 | if((size_t) io == fcb.len) |
| 657 | return errSuccess; |
| 658 | |
| 659 | if(io > -1) |
| 660 | return errWriteIncomplete; |
| 661 | |
| 662 | switch(errno) { |
| 663 | case EINTR: |
| 664 | return errWriteInterrupted; |
| 665 | default: |
| 666 | return errWriteFailure; |
| 667 | } |
| 668 | #endif // WIN32 |
| 669 | } |
| 670 | |
| 671 | off_t SharedFile::getPosition(void) |
| 672 | { |
| 673 | return fcb.pos; |
| 674 | } |
| 675 | |
| 676 | bool SharedFile::operator++(void) |
| 677 | { |
| 678 | off_t eof; |
| 679 | |
| 680 | enterMutex(); |
| 681 | fcb.pos += fcb.len; |
| 682 | #ifdef _MSWINDOWS_ |
| 683 | eof = SetFilePointer(fd, 0l, NULL, FILE_END); |
| 684 | #else |
| 685 | eof = lseek(fd, 0l, SEEK_END); |
| 686 | #endif |
| 687 | |
| 688 | if(fcb.pos >= eof) { |
| 689 | fcb.pos = eof; |
| 690 | leaveMutex(); |
| 691 | return true; |
| 692 | } |
| 693 | leaveMutex(); |
| 694 | return false; |
| 695 | } |
| 696 | |
| 697 | bool SharedFile::operator--(void) |
| 698 | { |
| 699 | enterMutex(); |
| 700 | fcb.pos -= fcb.len; |
| 701 | if(fcb.pos <= 0) { |
| 702 | fcb.pos = 0; |
| 703 | leaveMutex(); |
| 704 | return true; |
| 705 | } |
| 706 | leaveMutex(); |
| 707 | return false; |
| 708 | } |
| 709 | |
| 710 | size_t MappedFile::pageAligned(size_t size) |
| 711 | { |
| 712 | size_t pages = size / Process::getPageSize(); |
| 713 | |
| 714 | if(size % Process::getPageSize()) |
| 715 | ++pages; |
| 716 | |
| 717 | return pages * Process::getPageSize(); |
| 718 | } |
| 719 | |
| 720 | #ifdef _MSWINDOWS_ |
| 721 | |
| 722 | static void makemapname(const char *source, char *target) |
| 723 | { |
| 724 | unsigned count = 60; |
| 725 | while(*source && count--) { |
| 726 | if(*source == '/' || *source == '\\') |
| 727 | *(target++) = '_'; |
| 728 | else |
| 729 | *(target++) = toupper(*source); |
| 730 | ++source; |
| 731 | } |
| 732 | *target = 0; |
| 733 | } |
| 734 | |
| 735 | MappedFile::MappedFile(const char *fname, Access mode, size_t size) : |
| 736 | RandomFile(fname) |
| 737 | { |
| 738 | DWORD share = 0, page = 0; |
| 739 | map = INVALID_HANDLE_VALUE; |
| 740 | fcb.address = NULL; |
| 741 | |
| 742 | switch(mode) { |
| 743 | case accessReadOnly: |
| 744 | share = FILE_SHARE_READ; |
| 745 | page = PAGE_READONLY; |
| 746 | prot = FILE_MAP_READ; |
| 747 | break; |
| 748 | case accessWriteOnly: |
| 749 | share = FILE_SHARE_WRITE; |
| 750 | page = PAGE_WRITECOPY; |
| 751 | prot = FILE_MAP_COPY; |
| 752 | break; |
| 753 | case accessReadWrite: |
| 754 | share = FILE_SHARE_READ|FILE_SHARE_WRITE; |
| 755 | page = PAGE_READWRITE; |
| 756 | prot = FILE_MAP_WRITE; |
| 757 | } |
| 758 | if(share || page) |
| 759 | fd = CreateFile(pathname, mode, share, NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_RANDOM_ACCESS, NULL); |
| 760 | else |
| 761 | fd = INVALID_HANDLE_VALUE; |
| 762 | |
| 763 | if(fd == INVALID_HANDLE_VALUE) { |
| 764 | error(errOpenFailed); |
| 765 | return; |
| 766 | } |
| 767 | SetFilePointer(fd, (LONG)size, 0, FILE_BEGIN); |
| 768 | SetEndOfFile(fd); |
| 769 | makemapname(fname, mapname); |
| 770 | map = CreateFileMapping(fd, NULL, page, 0, 0, mapname); |
| 771 | if(!map) |
| 772 | error(errMapFailed); |
| 773 | fcb.address = (caddr_t)MapViewOfFile(map, prot, 0, 0, size); |
| 774 | fcb.len = (ccxx_size_t)size; |
| 775 | fcb.pos = 0; |
| 776 | if(!fcb.address) |
| 777 | error(errMapFailed); |
| 778 | } |
| 779 | |
| 780 | MappedFile::MappedFile(const char *fname, Access mode) : |
| 781 | RandomFile(fname) |
| 782 | { |
| 783 | DWORD share = 0, page = 0; |
| 784 | map = INVALID_HANDLE_VALUE; |
| 785 | fcb.address = NULL; |
| 786 | |
| 787 | switch(mode) { |
| 788 | case accessReadOnly: |
| 789 | share = FILE_SHARE_READ; |
| 790 | page = PAGE_READONLY; |
| 791 | prot = FILE_MAP_READ; |
| 792 | break; |
| 793 | case accessWriteOnly: |
| 794 | share = FILE_SHARE_WRITE; |
| 795 | page = PAGE_WRITECOPY; |
| 796 | prot = FILE_MAP_COPY; |
| 797 | break; |
| 798 | case accessReadWrite: |
| 799 | share = FILE_SHARE_READ|FILE_SHARE_WRITE; |
| 800 | page = PAGE_READWRITE; |
| 801 | prot = FILE_MAP_WRITE; |
| 802 | } |
| 803 | if(share || page) |
| 804 | fd = CreateFile(pathname, mode, share, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_RANDOM_ACCESS, NULL); |
| 805 | else |
| 806 | fd = INVALID_HANDLE_VALUE; |
| 807 | |
| 808 | if(fd == INVALID_HANDLE_VALUE) { |
| 809 | error(errOpenFailed); |
| 810 | return; |
| 811 | } |
| 812 | makemapname(fname, mapname); |
| 813 | map = CreateFileMapping(fd, NULL, page, 0, 0, mapname); |
| 814 | if(!map) |
| 815 | error(errMapFailed); |
| 816 | } |
| 817 | |
| 818 | MappedFile::MappedFile(const char *fname, pos_t pos, size_t len, Access mode) : |
| 819 | RandomFile(fname) |
| 820 | { |
| 821 | DWORD share = 0, page = 0; |
| 822 | map = INVALID_HANDLE_VALUE; |
| 823 | fcb.address = NULL; |
| 824 | |
| 825 | switch(mode) { |
| 826 | case accessReadOnly: |
| 827 | share = FILE_SHARE_READ; |
| 828 | page = PAGE_READONLY; |
| 829 | prot = FILE_MAP_READ; |
| 830 | break; |
| 831 | case accessWriteOnly: |
| 832 | share = FILE_SHARE_WRITE; |
| 833 | page = PAGE_WRITECOPY; |
| 834 | prot = FILE_MAP_COPY; |
| 835 | break; |
| 836 | case accessReadWrite: |
| 837 | share = FILE_SHARE_READ|FILE_SHARE_WRITE; |
| 838 | page = PAGE_READWRITE; |
| 839 | prot = FILE_MAP_WRITE; |
| 840 | } |
| 841 | if(share || page) |
| 842 | fd = CreateFile(pathname, mode, share, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_RANDOM_ACCESS, NULL); |
| 843 | else |
| 844 | fd = INVALID_HANDLE_VALUE; |
| 845 | |
| 846 | if(fd == INVALID_HANDLE_VALUE) { |
| 847 | error(errOpenFailed); |
| 848 | return; |
| 849 | } |
| 850 | makemapname(fname, mapname); |
| 851 | map = CreateFileMapping(fd, NULL, page, 0, 0, mapname); |
| 852 | if(!map) { |
| 853 | error(errMapFailed); |
| 854 | return; |
| 855 | } |
| 856 | fcb.address = (caddr_t)MapViewOfFile(map, prot, 0, pos, len); |
| 857 | fcb.len = (ccxx_size_t)len; |
| 858 | fcb.pos = pos; |
| 859 | if(!fcb.address) |
| 860 | error(errMapFailed); |
| 861 | } |
| 862 | |
| 863 | MappedFile::~MappedFile() |
| 864 | { |
| 865 | if(fcb.address) { |
| 866 | unlock(); |
| 867 | UnmapViewOfFile(fcb.address); |
| 868 | } |
| 869 | |
| 870 | if(map != INVALID_HANDLE_VALUE) |
| 871 | CloseHandle(map); |
| 872 | |
| 873 | final(); |
| 874 | } |
| 875 | |
| 876 | void MappedFile::sync(void) |
| 877 | { |
| 878 | } |
| 879 | |
| 880 | void MappedFile::sync(caddr_t address, size_t len) |
| 881 | { |
| 882 | } |
| 883 | |
| 884 | void MappedFile::release(caddr_t address, size_t len) |
| 885 | { |
| 886 | if(fcb.address) { |
| 887 | unlock(); |
| 888 | UnmapViewOfFile(fcb.address); |
| 889 | } |
| 890 | fcb.address = NULL; |
| 891 | } |
| 892 | |
| 893 | caddr_t MappedFile::fetch(off_t pos, size_t len) |
| 894 | { |
| 895 | if(fcb.address) { |
| 896 | unlock(); |
| 897 | UnmapViewOfFile(fcb.address); |
| 898 | } |
| 899 | |
| 900 | fcb.address = (caddr_t)MapViewOfFile(map, prot, 0, pos, len); |
| 901 | fcb.len = (ccxx_size_t)len; |
| 902 | fcb.pos = pos; |
| 903 | if(!fcb.address) |
| 904 | error(errMapFailed); |
| 905 | |
| 906 | return fcb.address; |
| 907 | } |
| 908 | |
| 909 | void MappedFile::update(size_t offset, size_t len) |
| 910 | { |
| 911 | } |
| 912 | |
| 913 | void MappedFile::update(caddr_t address, size_t len) |
| 914 | { |
| 915 | } |
| 916 | |
| 917 | bool MappedFile::lock(void) |
| 918 | { |
| 919 | unlock(); |
| 920 | if(VirtualLock(fcb.address, fcb.len)) |
| 921 | fcb.locked = true; |
| 922 | return fcb.locked; |
| 923 | } |
| 924 | |
| 925 | void MappedFile::unlock(void) |
| 926 | { |
| 927 | if(!fcb.address) |
| 928 | fcb.locked = false; |
| 929 | |
| 930 | if(!fcb.locked) |
| 931 | return; |
| 932 | |
| 933 | VirtualUnlock(fcb.address, fcb.len); |
| 934 | fcb.locked = false; |
| 935 | } |
| 936 | |
| 937 | #else |
| 938 | #ifdef HAVE_MLOCK |
| 939 | MappedFile::MappedFile(const char *fname, Access mode) : |
| 940 | RandomFile(fname) |
| 941 | { |
| 942 | fd = open(fname, (int)mode); |
| 943 | if(fd < 0 && mode != accessReadOnly) |
| 944 | fd = ::open(pathname, O_CREAT | O_RDWR | O_TRUNC, |
| 945 | (int)attrPrivate); |
| 946 | |
| 947 | if(fd < 0) { |
| 948 | error(errOpenFailed); |
| 949 | return; |
| 950 | } |
| 951 | |
| 952 | switch(mode) { |
| 953 | case O_RDONLY: |
| 954 | prot = PROT_READ; |
| 955 | break; |
| 956 | case O_WRONLY: |
| 957 | prot = PROT_WRITE; |
| 958 | break; |
| 959 | default: |
| 960 | prot = PROT_READ | PROT_WRITE; |
| 961 | } |
| 962 | } |
| 963 | |
| 964 | MappedFile::MappedFile(const char *fname, Access mode, size_t size) : |
| 965 | RandomFile(fname) |
| 966 | { |
| 967 | fd = open(fname, (int)mode | O_CREAT, 0660); |
| 968 | |
| 969 | if(fd < 0) { |
| 970 | error(errOpenFailed); |
| 971 | return; |
| 972 | } |
| 973 | |
| 974 | switch(mode) { |
| 975 | case O_RDONLY: |
| 976 | prot = PROT_READ; |
| 977 | break; |
| 978 | case O_WRONLY: |
| 979 | prot = PROT_WRITE; |
| 980 | break; |
| 981 | default: |
| 982 | prot = PROT_READ | PROT_WRITE; |
| 983 | } |
| 984 | |
| 985 | enterMutex(); |
| 986 | lseek(fd, size, SEEK_SET); |
| 987 | fcb.address = (caddr_t)mmap(NULL, size, prot, MAP_SHARED, fd, 0); |
| 988 | fcb.len = size; |
| 989 | fcb.pos = 0; |
| 990 | leaveMutex(); |
| 991 | if((caddr_t)(fcb.address) == (caddr_t)(MAP_FAILED)) { |
| 992 | close(fd); |
| 993 | fd = -1; |
| 994 | error(errMapFailed); |
| 995 | } |
| 996 | } |
| 997 | |
| 998 | MappedFile::MappedFile(const char *fname, pos_t pos, size_t len, Access mode) : |
| 999 | RandomFile(fname) |
| 1000 | { |
| 1001 | fd = open(fname, (int)mode); |
| 1002 | if(fd < 0) { |
| 1003 | error(errOpenFailed); |
| 1004 | return; |
| 1005 | } |
| 1006 | |
| 1007 | switch(mode) { |
| 1008 | case O_RDONLY: |
| 1009 | prot = PROT_READ; |
| 1010 | break; |
| 1011 | case O_WRONLY: |
| 1012 | prot = PROT_WRITE; |
| 1013 | break; |
| 1014 | default: |
| 1015 | prot = PROT_READ | PROT_WRITE; |
| 1016 | } |
| 1017 | |
| 1018 | enterMutex(); |
| 1019 | lseek(fd, pos + len, SEEK_SET); |
| 1020 | fcb.address = (caddr_t)mmap(NULL, len, prot, MAP_SHARED, fd, pos); |
| 1021 | fcb.len = len; |
| 1022 | fcb.pos = pos; |
| 1023 | leaveMutex(); |
| 1024 | if((caddr_t)(fcb.address) == (caddr_t)(MAP_FAILED)) { |
| 1025 | close(fd); |
| 1026 | fd = -1; |
| 1027 | error(errMapFailed); |
| 1028 | } |
| 1029 | } |
| 1030 | |
| 1031 | MappedFile::~MappedFile() |
| 1032 | { |
| 1033 | unlock(); |
| 1034 | final(); |
| 1035 | } |
| 1036 | |
| 1037 | void MappedFile::sync(void) |
| 1038 | { |
| 1039 | msync(fcb.address, fcb.len, MS_SYNC); |
| 1040 | } |
| 1041 | |
| 1042 | void MappedFile::release(caddr_t address, size_t len) |
| 1043 | { |
| 1044 | enterMutex(); |
| 1045 | if(address) |
| 1046 | fcb.address = address; |
| 1047 | |
| 1048 | if(len) |
| 1049 | fcb.len = len; |
| 1050 | |
| 1051 | if(fcb.locked) |
| 1052 | unlock(); |
| 1053 | |
| 1054 | munmap(fcb.address, fcb.len); |
| 1055 | leaveMutex(); |
| 1056 | } |
| 1057 | |
| 1058 | caddr_t MappedFile::fetch(off_t pos, size_t len) |
| 1059 | { |
| 1060 | enterMutex(); |
| 1061 | unlock(); |
| 1062 | fcb.len = len; |
| 1063 | fcb.pos = pos; |
| 1064 | lseek(fd, fcb.pos + len, SEEK_SET); |
| 1065 | fcb.address = (caddr_t)mmap(NULL, len, prot, MAP_SHARED, fd, pos); |
| 1066 | leaveMutex(); |
| 1067 | return fcb.address; |
| 1068 | } |
| 1069 | |
| 1070 | bool MappedFile::lock(void) |
| 1071 | { |
| 1072 | unlock(); |
| 1073 | if(!mlock(fcb.address, fcb.len)) |
| 1074 | fcb.locked = true; |
| 1075 | return fcb.locked; |
| 1076 | } |
| 1077 | |
| 1078 | void MappedFile::unlock(void) |
| 1079 | { |
| 1080 | if(!fcb.address) |
| 1081 | fcb.locked = false; |
| 1082 | |
| 1083 | if(!fcb.locked) |
| 1084 | return; |
| 1085 | |
| 1086 | munlock(fcb.address, fcb.len); |
| 1087 | fcb.locked = false; |
| 1088 | } |
| 1089 | |
| 1090 | void MappedFile::update(size_t offset, size_t len) |
| 1091 | { |
| 1092 | int mode = MS_ASYNC; |
| 1093 | caddr_t address; |
| 1094 | |
| 1095 | if(flags.immediate) |
| 1096 | mode = MS_SYNC; |
| 1097 | |
| 1098 | enterMutex(); |
| 1099 | address = fcb.address; |
| 1100 | address += offset; |
| 1101 | if(!len) |
| 1102 | len = fcb.len; |
| 1103 | leaveMutex(); |
| 1104 | msync(address, len, mode); |
| 1105 | } |
| 1106 | |
| 1107 | void MappedFile::update(caddr_t address, size_t len) |
| 1108 | { |
| 1109 | int mode = MS_ASYNC; |
| 1110 | if(flags.immediate) |
| 1111 | mode = MS_SYNC; |
| 1112 | |
| 1113 | msync(address, len, mode); |
| 1114 | } |
| 1115 | #endif |
| 1116 | #endif // ndef WIN32 |
| 1117 | |
| 1118 | #ifdef _MSWINDOWS_ |
| 1119 | #ifndef SECS_BETWEEN_EPOCHS |
| 1120 | #define SECS_BETWEEN_EPOCHS 11644473600LL |
| 1121 | #endif |
| 1122 | |
| 1123 | #ifndef SECS_TO_100NS |
| 1124 | #define SECS_TO_100NS 10000000LL |
| 1125 | #endif |
| 1126 | #endif |
| 1127 | |
| 1128 | time_t lastAccessed(const char *path) |
| 1129 | { |
| 1130 | #ifdef _MSWINDOWS_ |
| 1131 | __int64 ts; |
| 1132 | WIN32_FILE_ATTRIBUTE_DATA ino; |
| 1133 | |
| 1134 | if(!GetFileAttributesEx(path, GetFileExInfoStandard, &ino)) |
| 1135 | return 0; |
| 1136 | |
| 1137 | ts = ((__int64)ino.ftLastAccessTime.dwHighDateTime << 32) + |
| 1138 | ino.ftLastAccessTime.dwLowDateTime; |
| 1139 | |
| 1140 | ts -= (SECS_BETWEEN_EPOCHS * SECS_TO_100NS); |
| 1141 | ts /= SECS_TO_100NS; |
| 1142 | |
| 1143 | return(time_t)ts; |
| 1144 | #else |
| 1145 | struct stat ino; |
| 1146 | |
| 1147 | if(stat(path, &ino)) |
| 1148 | return 0; |
| 1149 | |
| 1150 | return ino.st_atime; |
| 1151 | #endif |
| 1152 | } |
| 1153 | |
| 1154 | time_t lastModified(const char *path) |
| 1155 | { |
| 1156 | #ifdef _MSWINDOWS_ |
| 1157 | __int64 ts; |
| 1158 | WIN32_FILE_ATTRIBUTE_DATA ino; |
| 1159 | |
| 1160 | if(!GetFileAttributesEx(path, GetFileExInfoStandard, &ino)) |
| 1161 | return 0; |
| 1162 | |
| 1163 | ts = ((__int64)ino.ftLastWriteTime.dwHighDateTime << 32) + |
| 1164 | ino.ftLastWriteTime.dwLowDateTime; |
| 1165 | |
| 1166 | ts -= (SECS_BETWEEN_EPOCHS * SECS_TO_100NS); |
| 1167 | ts /= SECS_TO_100NS; |
| 1168 | |
| 1169 | return(time_t)ts; |
| 1170 | #else |
| 1171 | struct stat ino; |
| 1172 | |
| 1173 | if(stat(path, &ino)) |
| 1174 | return 0; |
| 1175 | |
| 1176 | return ino.st_mtime; |
| 1177 | #endif |
| 1178 | } |
| 1179 | |
| 1180 | bool isDir(const char *path) |
| 1181 | { |
| 1182 | #ifdef _MSWINDOWS_ |
| 1183 | DWORD attr = GetFileAttributes(path); |
| 1184 | if(attr == (DWORD)~0l) |
| 1185 | return false; |
| 1186 | |
| 1187 | if(attr & FILE_ATTRIBUTE_DIRECTORY) |
| 1188 | return true; |
| 1189 | |
| 1190 | return false; |
| 1191 | |
| 1192 | #else |
| 1193 | struct stat ino; |
| 1194 | |
| 1195 | if(stat(path, &ino)) |
| 1196 | return false; |
| 1197 | |
| 1198 | if(S_ISDIR(ino.st_mode)) |
| 1199 | return true; |
| 1200 | |
| 1201 | return false; |
| 1202 | #endif // WIN32 |
| 1203 | } |
| 1204 | |
| 1205 | bool isFile(const char *path) |
| 1206 | { |
| 1207 | #ifdef _MSWINDOWS_ |
| 1208 | DWORD attr = GetFileAttributes(path); |
| 1209 | if(attr == (DWORD)~0l) |
| 1210 | return false; |
| 1211 | |
| 1212 | if(attr & FILE_ATTRIBUTE_DIRECTORY) |
| 1213 | return false; |
| 1214 | |
| 1215 | return true; |
| 1216 | |
| 1217 | #else |
| 1218 | struct stat ino; |
| 1219 | |
| 1220 | if(stat(path, &ino)) |
| 1221 | return false; |
| 1222 | |
| 1223 | if(S_ISREG(ino.st_mode)) |
| 1224 | return true; |
| 1225 | |
| 1226 | return false; |
| 1227 | #endif // WIN32 |
| 1228 | } |
| 1229 | |
| 1230 | #ifndef _MSWINDOWS_ |
| 1231 | // the Win32 version is given in line in the header |
| 1232 | bool isDevice(const char *path) |
| 1233 | { |
| 1234 | struct stat ino; |
| 1235 | |
| 1236 | if(stat(path, &ino)) |
| 1237 | return false; |
| 1238 | |
| 1239 | if(S_ISCHR(ino.st_mode)) |
| 1240 | return true; |
| 1241 | |
| 1242 | return false; |
| 1243 | } |
| 1244 | #endif |
| 1245 | |
| 1246 | bool canAccess(const char *path) |
| 1247 | { |
| 1248 | #ifdef _MSWINDOWS_ |
| 1249 | DWORD attr = GetFileAttributes(path); |
| 1250 | if(attr == (DWORD)~0l) |
| 1251 | return false; |
| 1252 | |
| 1253 | if(attr & FILE_ATTRIBUTE_SYSTEM) |
| 1254 | return false; |
| 1255 | |
| 1256 | if(attr & FILE_ATTRIBUTE_HIDDEN) |
| 1257 | return false; |
| 1258 | |
| 1259 | return true; |
| 1260 | |
| 1261 | #else |
| 1262 | if(!access(path, R_OK)) |
| 1263 | return true; |
| 1264 | |
| 1265 | return false; |
| 1266 | |
| 1267 | #endif |
| 1268 | } |
| 1269 | |
| 1270 | bool canModify(const char *path) |
| 1271 | { |
| 1272 | #ifdef _MSWINDOWS_ |
| 1273 | DWORD attr = GetFileAttributes(path); |
| 1274 | |
| 1275 | if(!canAccess(path)) |
| 1276 | return false; |
| 1277 | |
| 1278 | if(attr & FILE_ATTRIBUTE_READONLY) |
| 1279 | return false; |
| 1280 | |
| 1281 | if(attr & (FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_NORMAL)) |
| 1282 | return true; |
| 1283 | |
| 1284 | return false; |
| 1285 | |
| 1286 | #else |
| 1287 | if(!access(path, W_OK | R_OK)) |
| 1288 | return true; |
| 1289 | |
| 1290 | return false; |
| 1291 | #endif |
| 1292 | } |
| 1293 | |
| 1294 | #ifdef _MSWINDOWS_ |
| 1295 | |
| 1296 | const char *File::getExtension(const char *path) |
| 1297 | { |
| 1298 | const char *cp = strrchr(path, '\\'); |
| 1299 | if(!cp) |
| 1300 | cp = strrchr(path, '/'); |
| 1301 | if(!cp) |
| 1302 | cp = strrchr(path, ':'); |
| 1303 | |
| 1304 | |
| 1305 | if(cp) |
| 1306 | ++cp; |
| 1307 | else |
| 1308 | cp = path; |
| 1309 | |
| 1310 | if(*cp == '.') |
| 1311 | return ""; |
| 1312 | |
| 1313 | cp = strrchr(cp, '.'); |
| 1314 | |
| 1315 | if(!cp) |
| 1316 | cp = ""; |
| 1317 | |
| 1318 | return cp; |
| 1319 | } |
| 1320 | |
| 1321 | const char *File::getFilename(const char *path) |
| 1322 | { |
| 1323 | const char *cp = strrchr(path, '\\'); |
| 1324 | if(cp) |
| 1325 | return ++cp; |
| 1326 | |
| 1327 | cp = strrchr(path, '/'); |
| 1328 | if(cp) |
| 1329 | return ++cp; |
| 1330 | |
| 1331 | cp = strrchr(path, ':'); |
| 1332 | if(cp) |
| 1333 | ++cp; |
| 1334 | |
| 1335 | return path; |
| 1336 | } |
| 1337 | |
| 1338 | char *File::getFilename(const char *path, char *buffer, size_t size) |
| 1339 | { |
| 1340 | const char *cp = strrchr(path, '\\'); |
| 1341 | if(!cp) |
| 1342 | cp = strrchr(path, '/'); |
| 1343 | if(!cp) |
| 1344 | cp = strrchr(path, ':'); |
| 1345 | |
| 1346 | if(cp) |
| 1347 | snprintf(buffer, size, "%s", ++cp); |
| 1348 | else |
| 1349 | snprintf(buffer, size, "%s", path); |
| 1350 | |
| 1351 | return buffer; |
| 1352 | } |
| 1353 | |
| 1354 | char *File::getDirname(const char *path, char *buffer, size_t size) |
| 1355 | { |
| 1356 | size_t len; |
| 1357 | const char *cp = strrchr(path, '\\'); |
| 1358 | |
| 1359 | snprintf(buffer, size, "%s", path); |
| 1360 | |
| 1361 | if(!cp) |
| 1362 | cp = strrchr(path, '/'); |
| 1363 | if(!cp) |
| 1364 | cp = strrchr(path, ':'); |
| 1365 | |
| 1366 | if(!cp) |
| 1367 | return buffer; |
| 1368 | |
| 1369 | if(cp) |
| 1370 | len = cp - path; |
| 1371 | |
| 1372 | if(len >= size) |
| 1373 | len = size - 1; |
| 1374 | buffer[len] = 0; |
| 1375 | return buffer; |
| 1376 | } |
| 1377 | |
| 1378 | #else |
| 1379 | |
| 1380 | const char *File::getExtension(const char *path) |
| 1381 | { |
| 1382 | const char *cp = strrchr(path, '/'); |
| 1383 | if(cp) |
| 1384 | ++cp; |
| 1385 | else |
| 1386 | cp = path; |
| 1387 | |
| 1388 | if(*cp == '.') |
| 1389 | return ""; |
| 1390 | |
| 1391 | cp = strrchr(cp, '.'); |
| 1392 | if(cp) |
| 1393 | return cp; |
| 1394 | return ""; |
| 1395 | } |
| 1396 | |
| 1397 | char *File::getDirname(const char *path, char *buffer, size_t size) |
| 1398 | { |
| 1399 | unsigned len; |
| 1400 | const char *cp = strrchr(path, '/'); |
| 1401 | |
| 1402 | snprintf(buffer, size, "%s", path); |
| 1403 | |
| 1404 | if(!cp) |
| 1405 | return buffer; |
| 1406 | |
| 1407 | if(cp) |
| 1408 | len = cp - path; |
| 1409 | |
| 1410 | if(len >= size) |
| 1411 | len = size - 1; |
| 1412 | buffer[len] = 0; |
| 1413 | return buffer; |
| 1414 | } |
| 1415 | |
| 1416 | const char *File::getFilename(const char *path) |
| 1417 | { |
| 1418 | const char *cp = strrchr(path, '/'); |
| 1419 | |
| 1420 | if(cp) |
| 1421 | return ++cp; |
| 1422 | |
| 1423 | return path; |
| 1424 | } |
| 1425 | |
| 1426 | char *File::getFilename(const char *path, char *buffer, size_t size) |
| 1427 | { |
| 1428 | const char *cp = strrchr(path, '/'); |
| 1429 | |
| 1430 | if(cp) |
| 1431 | snprintf(buffer, size, "%s", ++cp); |
| 1432 | else |
| 1433 | snprintf(buffer, size, "%s", path); |
| 1434 | |
| 1435 | return buffer; |
| 1436 | } |
| 1437 | |
| 1438 | #endif |
| 1439 | |
| 1440 | #ifdef HAVE_REALPATH |
| 1441 | |
| 1442 | char *File::getRealpath(const char *path, char *buffer, size_t size) |
| 1443 | { |
| 1444 | char temp[PATH_MAX]; |
| 1445 | setString(buffer, size, "."); |
| 1446 | if(!realpath(path, temp)) |
| 1447 | return NULL; |
| 1448 | if(strlen(temp) >= size) |
| 1449 | return NULL; |
| 1450 | setString(buffer, size, temp); |
| 1451 | return buffer; |
| 1452 | } |
| 1453 | |
| 1454 | #else |
| 1455 | |
| 1456 | #ifdef _MSWINDOWS_ |
| 1457 | static char *getFile(char *path) |
| 1458 | { |
| 1459 | char *cp = strchr(path, '\\'); |
| 1460 | if(!cp) |
| 1461 | cp = strchr(path, '/'); |
| 1462 | if(!cp) |
| 1463 | cp = strchr(path, ':'); |
| 1464 | return cp; |
| 1465 | } |
| 1466 | #else |
| 1467 | static char *getFile(char *path) |
| 1468 | { |
| 1469 | return strchr(path, '/'); |
| 1470 | } |
| 1471 | #endif |
| 1472 | |
| 1473 | char *File::getRealpath(const char *path, char *buffer, size_t size) |
| 1474 | { |
| 1475 | if(size > PATH_MAX) |
| 1476 | size = PATH_MAX; |
| 1477 | |
| 1478 | #ifdef HAVE_LSTAT |
| 1479 | unsigned symlinks = 0; |
| 1480 | #endif |
| 1481 | #if !defined(DYNAMCIC_LOCAL_ARRAYS) |
| 1482 | char left[PATH_MAX]; |
| 1483 | #else |
| 1484 | char left[size]; |
| 1485 | #endif |
| 1486 | size_t left_len, buffer_len; |
| 1487 | |
| 1488 | #ifdef _MSWINDOWS_ |
| 1489 | if(path[1] == ':') |
| 1490 | #else |
| 1491 | if(path[0] == '/') |
| 1492 | #endif |
| 1493 | { |
| 1494 | buffer[0] = '/'; |
| 1495 | buffer[1] = 0; |
| 1496 | if(!path[1]) |
| 1497 | return buffer; |
| 1498 | |
| 1499 | buffer_len = 1; |
| 1500 | snprintf(left, size, "%s", path + 1); |
| 1501 | left_len = strlen(left); |
| 1502 | } |
| 1503 | else { |
| 1504 | if(!Dir::getPrefix(buffer, size)) { |
| 1505 | snprintf(buffer, size, "%s", "."); |
| 1506 | return NULL; |
| 1507 | } |
| 1508 | buffer_len = strlen(buffer); |
| 1509 | snprintf(left, size, "%s", path); |
| 1510 | left_len = strlen(left); |
| 1511 | } |
| 1512 | |
| 1513 | if(left_len >= size || buffer_len >= size) |
| 1514 | return NULL; |
| 1515 | |
| 1516 | while(left_len > 0) { |
| 1517 | #ifdef HAVE_LSTAT |
| 1518 | struct stat ino; |
| 1519 | #endif |
| 1520 | #if !defined(DYNAMIC_LOCAL_ARRAYS) |
| 1521 | char next_token[PATH_MAX]; |
| 1522 | #else |
| 1523 | char next_token[size]; |
| 1524 | #endif |
| 1525 | char *p; |
| 1526 | const char *s = (p = getFile(left)) ? p : left + left_len; |
| 1527 | |
| 1528 | memmove(next_token, left, s - left); |
| 1529 | left_len -= s - left; |
| 1530 | if(p != NULL) |
| 1531 | memmove(left, s + 1, left_len + 1); |
| 1532 | |
| 1533 | next_token[s - left] = 0; |
| 1534 | if(buffer[buffer_len - 1] != '/') { |
| 1535 | if(buffer_len +1 >= size) |
| 1536 | return NULL; |
| 1537 | |
| 1538 | buffer[buffer_len++] = '/'; |
| 1539 | buffer[buffer_len] = 0; |
| 1540 | } |
| 1541 | if(!next_token[0]) |
| 1542 | continue; |
| 1543 | else if(!strcmp(next_token, ".")) |
| 1544 | continue; |
| 1545 | else if(!strcmp(next_token, "..")) { |
| 1546 | if(buffer_len > 1) { |
| 1547 | char *q; |
| 1548 | buffer[buffer_len - 1] = 0; |
| 1549 | #ifdef _MSWINDOWS_ |
| 1550 | q = strrchr(buffer, '\\'); |
| 1551 | if(!q) |
| 1552 | q = strrchr(buffer, '/'); |
| 1553 | if(!q) |
| 1554 | q = strchr(buffer, ':'); |
| 1555 | #else |
| 1556 | q = strrchr(buffer, '/'); |
| 1557 | #endif |
| 1558 | *q = 0; |
| 1559 | buffer_len = q - buffer; |
| 1560 | } |
| 1561 | continue; |
| 1562 | } |
| 1563 | snprintf(next_token, size, "%s", buffer); |
| 1564 | buffer_len = strlen(buffer); |
| 1565 | if(buffer_len >= size) |
| 1566 | return NULL; |
| 1567 | |
| 1568 | #ifndef HAVE_LSTAT |
| 1569 | if(!isFile(buffer) && !isDir(buffer)) |
| 1570 | return buffer; |
| 1571 | |
| 1572 | continue; |
| 1573 | #else |
| 1574 | if(lstat(buffer, &ino) < 0) { |
| 1575 | if(errno == ENOENT && !p) |
| 1576 | return buffer; |
| 1577 | |
| 1578 | return NULL; |
| 1579 | } |
| 1580 | |
| 1581 | if((ino.st_mode & S_IFLNK) == S_IFLNK) { |
| 1582 | char symlink[size]; |
| 1583 | int slen; |
| 1584 | |
| 1585 | if (symlinks++ > MAXSYMLINKS) |
| 1586 | return NULL; |
| 1587 | |
| 1588 | slen = readlink(buffer, symlink, size); |
| 1589 | |
| 1590 | if (slen < 0) |
| 1591 | return NULL; |
| 1592 | symlink[slen] = 0; |
| 1593 | |
| 1594 | if (symlink[0] == '/') { |
| 1595 | buffer[1] = 0; |
| 1596 | buffer_len = 1; |
| 1597 | } else if (buffer_len > 1) { |
| 1598 | char *q; |
| 1599 | |
| 1600 | buffer[buffer_len - 1] = 0; |
| 1601 | q = strrchr(buffer, '/'); |
| 1602 | *q = 0; |
| 1603 | buffer_len = q - buffer; |
| 1604 | } |
| 1605 | if (symlink[slen - 1] != '/' && p) { |
| 1606 | if (slen >= size) |
| 1607 | return NULL; |
| 1608 | |
| 1609 | symlink[slen] = '/'; |
| 1610 | symlink[slen + 1] = 0; |
| 1611 | } |
| 1612 | if(p) { |
| 1613 | snprintf(symlink, size, "%s", left); |
| 1614 | left_len = strlen(symlink); |
| 1615 | } |
| 1616 | if(left_len >= size) |
| 1617 | return NULL; |
| 1618 | snprintf(left, size, "%s", symlink); |
| 1619 | left_len = strlen(left); |
| 1620 | } |
| 1621 | #endif |
| 1622 | |
| 1623 | } |
| 1624 | |
| 1625 | #ifdef _MSWINDOWS_ |
| 1626 | if(buffer_len > 1 && buffer[buffer_len - 1] == '\\') |
| 1627 | buffer[buffer_len - 1] = 0; |
| 1628 | else if(buffer_len > 1 && buffer[buffer_len - 1] == '/') |
| 1629 | buffer[buffer_len - 1] = 0; |
| 1630 | #else |
| 1631 | if(buffer_len > 1 && buffer[buffer_len - 1] == '/') |
| 1632 | buffer[buffer_len - 1] = 0; |
| 1633 | #endif |
| 1634 | return buffer; |
| 1635 | } |
| 1636 | |
| 1637 | #endif |
| 1638 | |
| 1639 | END_NAMESPACE |