CFFileUtilities.c

   1 /*
   2  * Copyright (c) 2015 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 /*      CFFileUtilities.c
  25         Copyright (c) 1999-2014, Apple Inc. All rights reserved.
  26         Responsibility: Tony Parker
  27 */
  28
  29 #include "CFInternal.h"
  30 #include <CoreFoundation/CFPriv.h>
  31
  32 #include <sys/stat.h>
  33 #include <errno.h>
  34 #include <string.h>
  35 #include <stdio.h>
  36
  37 #if DEPLOYMENT_TARGET_WINDOWS
  38 #include <io.h>
  39 #include <fcntl.h>
  40
  41 #define close _close
  42 #define write _write
  43 #define read _read
  44 #define open _NS_open
  45 #define stat _NS_stat
  46 #define fstat _fstat
  47 #define mkdir(a,b) _NS_mkdir(a)
  48 #define rmdir _NS_rmdir
  49 #define unlink _NS_unlink
  50
  51 #define statinfo _stat
  52
  53 #else
  54
  55 #include <unistd.h>
  56 #include <dirent.h>
  57 #include <sys/types.h>
  58 #include <pwd.h>
  59 #include <fcntl.h>
  60
  61 #define statinfo stat
  62
  63 #endif
  64
  65 CF_INLINE int openAutoFSNoWait() {
  66 #if DEPLOYMENT_TARGET_WINDOWS
  67     return -1;
  68 #else
  69     return (__CFProphylacticAutofsAccess ? open("/dev/autofs_nowait", 0) : -1);
  70 #endif
  71 }
  72
  73 CF_INLINE void closeAutoFSNoWait(int fd) {
  74     if (-1 != fd) close(fd);
  75 }
  76
  77 CF_PRIVATE CFStringRef _CFCopyExtensionForAbstractType(CFStringRef abstractType) {
  78     return (abstractType ? (CFStringRef)CFRetain(abstractType) : NULL);
  79 }
  80
  81
  82 CF_PRIVATE Boolean _CFCreateDirectory(const char *path) {
  83     int no_hang_fd = openAutoFSNoWait();
  84     int ret = ((mkdir(path, 0777) == 0) ? true : false);
  85     closeAutoFSNoWait(no_hang_fd);
  86     return ret;
  87 }
  88
  89 CF_PRIVATE Boolean _CFRemoveDirectory(const char *path) {
  90     int no_hang_fd = openAutoFSNoWait();
  91     int ret = ((rmdir(path) == 0) ? true : false);
  92     closeAutoFSNoWait(no_hang_fd);
  93     return ret;
  94 }
  95
  96 CF_PRIVATE Boolean _CFDeleteFile(const char *path) {
  97     int no_hang_fd = openAutoFSNoWait();
  98     int ret = unlink(path) == 0;
  99     closeAutoFSNoWait(no_hang_fd);
 100     return ret;
 101 }
 102
 103 static Boolean _CFReadBytesFromPathAndGetFD(CFAllocatorRef alloc, const char *path, void **bytes, CFIndex *length, CFIndex maxLength, int extraOpenFlags, int *fd) {    // maxLength is the number of bytes desired, or 0 if the whole file is desired regardless of length.
 104     struct statinfo statBuf;
 105
 106     *bytes = NULL;
 107
 108
 109     int no_hang_fd = openAutoFSNoWait();
 110     *fd = open(path, O_RDONLY|extraOpenFlags|CF_OPENFLGS, 0666);
 111
 112     if (*fd < 0) {
 113         closeAutoFSNoWait(no_hang_fd);
 114         return false;
 115     }
 116     if (fstat(*fd, &statBuf) < 0) {
 117         int saveerr = thread_errno();
 118         close(*fd);
 119         *fd = -1;
 120         closeAutoFSNoWait(no_hang_fd);
 121         thread_set_errno(saveerr);
 122         return false;
 123     }
 124     if ((statBuf.st_mode & S_IFMT) != S_IFREG) {
 125         close(*fd);
 126         *fd = -1;
 127         closeAutoFSNoWait(no_hang_fd);
 128         thread_set_errno(EACCES);
 129         return false;
 130     }
 131     if (statBuf.st_size == 0) {
 132         *bytes = CFAllocatorAllocate(alloc, 4, 0); // don't return constant string -- it's freed!
 133         if (__CFOASafe) __CFSetLastAllocationEventName(*bytes, "CFUtilities (file-bytes)");
 134         *length = 0;
 135     } else {
 136         CFIndex desiredLength;
 137         if ((maxLength >= statBuf.st_size) || (maxLength == 0)) {
 138             desiredLength = statBuf.st_size;
 139         } else {
 140             desiredLength = maxLength;
 141         }
 142         *bytes = CFAllocatorAllocate(alloc, desiredLength, 0);
 143         if (!bytes) {
 144             close(*fd);
 145             *fd = -1;
 146             closeAutoFSNoWait(no_hang_fd);
 147             return false;
 148         }
 149         if (__CFOASafe) __CFSetLastAllocationEventName(*bytes, "CFUtilities (file-bytes)");
 150         //      fcntl(fd, F_NOCACHE, 1);
 151         if (read(*fd, *bytes, desiredLength) < 0) {
 152             CFAllocatorDeallocate(alloc, *bytes);
 153             close(*fd);
 154             *fd = -1;
 155             closeAutoFSNoWait(no_hang_fd);
 156             return false;
 157         }
 158         *length = desiredLength;
 159     }
 160     closeAutoFSNoWait(no_hang_fd);
 161     return true;
 162 }
 163
 164 static Boolean _CFReadBytesFromPath(CFAllocatorRef alloc, const char *path, void **bytes, CFIndex *length, CFIndex maxLength, int extraOpenFlags) {
 165     int fd = -1;
 166     Boolean result = _CFReadBytesFromPathAndGetFD(alloc, path, bytes, length, maxLength, extraOpenFlags, &fd);
 167     if (fd >= 0) {
 168         close(fd);
 169     }
 170     return result;
 171 }
 172 CF_PRIVATE Boolean _CFReadBytesFromFile(CFAllocatorRef alloc, CFURLRef url, void **bytes, CFIndex *length, CFIndex maxLength, int extraOpenFlags) {
 173     // maxLength is the number of bytes desired, or 0 if the whole file is desired regardless of length.
 174
 175     char path[CFMaxPathSize];
 176     if (!CFURLGetFileSystemRepresentation(url, true, (uint8_t *)path, CFMaxPathSize)) {
 177         return false;
 178     }
 179     return _CFReadBytesFromPath(alloc, (const char *)path, bytes, length, maxLength, extraOpenFlags);
 180 }
 181
 182 CF_PRIVATE Boolean _CFWriteBytesToFile(CFURLRef url, const void *bytes, CFIndex length) {
 183     int fd = -1;
 184     int mode;
 185     struct statinfo statBuf;
 186     char path[CFMaxPathSize];
 187     if (!CFURLGetFileSystemRepresentation(url, true, (uint8_t *)path, CFMaxPathSize)) {
 188         return false;
 189     }
 190
 191     int no_hang_fd = openAutoFSNoWait();
 192     mode = 0666;
 193     if (0 == stat(path, &statBuf)) {
 194         mode = statBuf.st_mode;
 195     } else if (thread_errno() != ENOENT) {
 196         closeAutoFSNoWait(no_hang_fd);
 197         return false;
 198     }
 199     fd = open(path, O_WRONLY|O_CREAT|O_TRUNC|CF_OPENFLGS, 0666);
 200     if (fd < 0) {
 201         closeAutoFSNoWait(no_hang_fd);
 202         return false;
 203     }
 204     if (length && write(fd, bytes, length) != length) {
 205         int saveerr = thread_errno();
 206         close(fd);
 207         closeAutoFSNoWait(no_hang_fd);
 208         thread_set_errno(saveerr);
 209         return false;
 210     }
 211 #if DEPLOYMENT_TARGET_WINDOWS
 212     FlushFileBuffers((HANDLE)_get_osfhandle(fd));
 213 #else
 214     fsync(fd);
 215 #endif
 216     close(fd);
 217     closeAutoFSNoWait(no_hang_fd);
 218     return true;
 219 }
 220
 221
 222 /* On Mac OS 8/9, one of dirSpec and dirURL must be non-NULL.  On all other platforms, one of path and dirURL must be non-NULL
 223 If both are present, they are assumed to be in-synch; that is, they both refer to the same directory.  */
 224 /* Lately, dirSpec appears to be (rightfully) unused. */
 225 CF_PRIVATE CFMutableArrayRef _CFCreateContentsOfDirectory(CFAllocatorRef alloc, char *dirPath, void *dirSpec, CFURLRef dirURL, CFStringRef matchingAbstractType) {
 226     CFMutableArrayRef files = NULL;
 227     Boolean releaseBase = false;
 228     CFIndex pathLength = dirPath ? strlen(dirPath) : 0;
 229     // MF:!!! Need to use four-letter type codes where appropriate.
 230     CFStringRef extension = (matchingAbstractType ? _CFCopyExtensionForAbstractType(matchingAbstractType) : NULL);
 231     CFIndex targetExtLen = (extension ? CFStringGetLength(extension) : 0);
 232
 233 #if DEPLOYMENT_TARGET_WINDOWS
 234     // This is a replacement for 'dirent' below, and also uses wchar_t to support unicode paths
 235     wchar_t extBuff[CFMaxPathSize];
 236     int extBuffInteriorDotCount = 0; //people insist on using extensions like ".trace.plist", so we need to know how many dots back to look :(
 237
 238     if (targetExtLen > 0) {
 239         CFIndex usedBytes = 0;
 240         CFStringGetBytes(extension, CFRangeMake(0, targetExtLen), kCFStringEncodingUTF16, 0, false, (uint8_t *)extBuff, CFMaxPathLength, &usedBytes);
 241         targetExtLen = usedBytes / sizeof(wchar_t);
 242         extBuff[targetExtLen] = '\0';
 243         wchar_t *extBuffStr = (wchar_t *)extBuff;
 244         if (extBuffStr[0] == '.')
 245             extBuffStr++; //skip the first dot, it's legitimate to have ".plist" for example
 246
 247         wchar_t *extBuffDotPtr = extBuffStr;
 248         while ((extBuffDotPtr = wcschr(extBuffStr, '.'))) { //find the next . in the extension...
 249             extBuffInteriorDotCount++;
 250             extBuffStr = extBuffDotPtr + 1;
 251         }
 252     }
 253
 254     wchar_t pathBuf[CFMaxPathSize];
 255
 256     if (!dirPath) {
 257         if (!_CFURLGetWideFileSystemRepresentation(dirURL, true, pathBuf, CFMaxPathLength)) {
 258             if (extension) CFRelease(extension);
 259             return NULL;
 260         }
 261
 262         pathLength = wcslen(pathBuf);
 263
 264     } else {
 265         // Convert dirPath to a wide representation and put it into our pathBuf
 266         // Get the real length of the string in UTF16 characters
 267         CFStringRef dirPathStr = CFStringCreateWithCString(kCFAllocatorSystemDefault, dirPath, kCFStringEncodingUTF8);
 268         CFIndex strLen = CFStringGetLength(dirPathStr);
 269
 270         // Copy the string into the buffer and terminate
 271         CFStringGetCharacters(dirPathStr, CFRangeMake(0, strLen), (UniChar *)pathBuf);
 272         pathBuf[strLen] = 0;
 273
 274         CFRelease(dirPathStr);
 275     }
 276
 277     WIN32_FIND_DATAW  file;
 278     HANDLE handle;
 279
 280     if (pathLength + 2 >= CFMaxPathLength) {
 281         if (extension) {
 282             CFRelease(extension);
 283         }
 284         return NULL;
 285     }
 286
 287     pathBuf[pathLength] = '\\';
 288     pathBuf[pathLength + 1] = '*';
 289     pathBuf[pathLength + 2] = '\0';
 290     handle = FindFirstFileW(pathBuf, (LPWIN32_FIND_DATAW)&file);
 291     if (INVALID_HANDLE_VALUE == handle) {
 292         pathBuf[pathLength] = '\0';
 293         if (extension) {
 294             CFRelease(extension);
 295         }
 296         return NULL;
 297     }
 298
 299     files = CFArrayCreateMutable(alloc, 0, &kCFTypeArrayCallBacks);
 300
 301     do {
 302         CFURLRef fileURL;
 303         CFIndex namelen = wcslen(file.cFileName);
 304         if (file.cFileName[0] == '.' && (namelen == 1 || (namelen == 2  && file.cFileName[1] == '.'))) {
 305             continue;
 306         }
 307
 308         if (targetExtLen > namelen) continue;    // if the extension is the same length or longer than the name, it can't possibly match.
 309
 310         if (targetExtLen > 0) {
 311             if (file.cFileName[namelen - 1] == '.') continue; //filename ends with a dot, no extension
 312
 313             wchar_t *fileExt = NULL;
 314
 315             if (extBuffInteriorDotCount == 0) {
 316                 fileExt = wcsrchr(file.cFileName, '.');
 317             } else { //find the Nth occurrence of . from the end of the string, to handle ".foo.bar"
 318                 wchar_t *save = file.cFileName;
 319                 while ((save = wcschr(save, '.')) && !fileExt) {
 320                     wchar_t *temp = save;
 321                     int moreDots = 0;
 322                     while ((temp = wcschr(temp, '.'))) {
 323                         if (++moreDots == extBuffInteriorDotCount) break;
 324                     }
 325                     if (moreDots == extBuffInteriorDotCount) {
 326                         fileExt = save;
 327                     }
 328                 }
 329             }
 330
 331             if (!fileExt) continue; //no extension
 332
 333             if (((const wchar_t *)extBuff)[0] != '.')
 334                 fileExt++; //omit the dot if the target file extension omits the dot
 335
 336             CFIndex fileExtLen = wcslen(fileExt);
 337
 338             //if the extensions are different lengths, they can't possibly match
 339             if (fileExtLen != targetExtLen) continue;
 340
 341             // Check to see if it matches the extension we're looking for.
 342             if (_wcsicmp(fileExt, (const wchar_t *)extBuff) != 0) {
 343                 continue;
 344             }
 345         }
 346         if (dirURL == NULL) {
 347             CFStringRef dirURLStr = CFStringCreateWithBytes(alloc, (const uint8_t *)pathBuf, pathLength * sizeof(wchar_t), kCFStringEncodingUTF16, NO);
 348             dirURL = CFURLCreateWithFileSystemPath(alloc, dirURLStr, kCFURLWindowsPathStyle, true);
 349             CFRelease(dirURLStr);
 350             releaseBase = true;
 351         }
 352         // MF:!!! What about the trailing slash?
 353         CFStringRef fileURLStr = CFStringCreateWithBytes(alloc, (const uint8_t *)file.cFileName, namelen * sizeof(wchar_t), kCFStringEncodingUTF16, NO);
 354         fileURL = CFURLCreateWithFileSystemPathRelativeToBase(alloc, fileURLStr, kCFURLWindowsPathStyle, (file.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) ? true : false, dirURL);
 355         CFArrayAppendValue(files, fileURL);
 356         CFRelease(fileURL);
 357         CFRelease(fileURLStr);
 358     } while (FindNextFileW(handle, &file));
 359     FindClose(handle);
 360     pathBuf[pathLength] = '\0';
 361
 362 #elif DEPLOYMENT_TARGET_MACOSX || DEPLOYMENT_TARGET_EMBEDDED || DEPLOYMENT_TARGET_EMBEDDED_MINI || DEPLOYMENT_TARGET_LINUX || DEPLOYMENT_TARGET_FREEBSD
 363     uint8_t extBuff[CFMaxPathSize];
 364     int extBuffInteriorDotCount = 0; //people insist on using extensions like ".trace.plist", so we need to know how many dots back to look :(
 365
 366     if (targetExtLen > 0) {
 367         CFStringGetBytes(extension, CFRangeMake(0, targetExtLen), CFStringFileSystemEncoding(), 0, false, extBuff, CFMaxPathLength, &targetExtLen);
 368         extBuff[targetExtLen] = '\0';
 369         char *extBuffStr = (char *)extBuff;
 370         if (extBuffStr[0] == '.')
 371             extBuffStr++; //skip the first dot, it's legitimate to have ".plist" for example
 372
 373         char *extBuffDotPtr = extBuffStr;
 374         while ((extBuffDotPtr = strchr(extBuffStr, '.'))) { //find the next . in the extension...
 375             extBuffInteriorDotCount++;
 376             extBuffStr = extBuffDotPtr + 1;
 377         }
 378     }
 379
 380     uint8_t pathBuf[CFMaxPathSize];
 381
 382     if (!dirPath) {
 383         if (!CFURLGetFileSystemRepresentation(dirURL, true, pathBuf, CFMaxPathLength)) {
 384             if (extension) CFRelease(extension);
 385             return NULL;
 386         } else {
 387             dirPath = (char *)pathBuf;
 388             pathLength = strlen(dirPath);
 389         }
 390     }
 391
 392     struct dirent buffer;
 393     struct dirent *dp;
 394     int err;
 395
 396     int no_hang_fd = __CFProphylacticAutofsAccess ? open("/dev/autofs_nowait", 0) : -1;
 397
 398     DIR *dirp = opendir(dirPath);
 399     if (!dirp) {
 400         if (extension) {
 401             CFRelease(extension);
 402         }
 403         if (-1 != no_hang_fd) close(no_hang_fd);
 404         return NULL;
 405         // raiseErrno("opendir", path);
 406     }
 407     files = CFArrayCreateMutable(alloc, 0, & kCFTypeArrayCallBacks);
 408
 409     while((0 == readdir_r(dirp, &buffer, &dp)) && dp) {
 410         CFURLRef fileURL;
 411         unsigned namelen = strlen(dp->d_name);
 412
 413         // skip . & ..; they cause descenders to go berserk
 414         if (dp->d_name[0] == '.' && (namelen == 1 || (namelen == 2 && dp->d_name[1] == '.'))) {
 415             continue;
 416         }
 417
 418         if (targetExtLen > namelen) continue;    // if the extension is the same length or longer than the name, it can't possibly match.
 419
 420         if (targetExtLen > 0) {
 421             if (dp->d_name[namelen - 1] == '.') continue; //filename ends with a dot, no extension
 422
 423             char *fileExt = NULL;
 424             if (extBuffInteriorDotCount == 0) {
 425                 fileExt = strrchr(dp->d_name, '.');
 426             } else { //find the Nth occurrence of . from the end of the string, to handle ".foo.bar"
 427                 char *save = dp->d_name;
 428                 while ((save = strchr(save, '.')) && !fileExt) {
 429                     char *temp = save;
 430                     int moreDots = 0;
 431                     while ((temp = strchr(temp, '.'))) {
 432                         if (++moreDots == extBuffInteriorDotCount) break;
 433                     }
 434                     if (moreDots == extBuffInteriorDotCount) {
 435                         fileExt = save;
 436                     }
 437                 }
 438             }
 439
 440             if (!fileExt) continue; //no extension
 441
 442             if (((char *)extBuff)[0] != '.')
 443                 fileExt++; //omit the dot if the target extension omits the dot; safe, because we checked to make sure it isn't the last character just before
 444
 445             size_t fileExtLen = strlen(fileExt);
 446
 447             //if the extensions are different lengths, they can't possibly match
 448             if (fileExtLen != targetExtLen) continue;
 449
 450             // Check to see if it matches the extension we're looking for.
 451             if (strncmp(fileExt, (char *)extBuff, fileExtLen) != 0) {
 452                 continue;
 453             }
 454         }
 455         if (dirURL == NULL) {
 456             dirURL = CFURLCreateFromFileSystemRepresentation(alloc, (uint8_t *)dirPath, pathLength, true);
 457             releaseBase = true;
 458         }
 459         if (dp->d_type == DT_DIR || dp->d_type == DT_UNKNOWN || dp->d_type == DT_LNK || dp->d_type == DT_WHT) {
 460             Boolean isDir = (dp->d_type == DT_DIR);
 461             if (!isDir) {
 462                 // Ugh; must stat.
 463                 char subdirPath[CFMaxPathLength];
 464                 struct statinfo statBuf;
 465                 strlcpy(subdirPath, dirPath, sizeof(subdirPath));
 466                 strlcat(subdirPath, "/", sizeof(subdirPath));
 467                 strlcat(subdirPath, dp->d_name, sizeof(subdirPath));
 468                 if (stat(subdirPath, &statBuf) == 0) {
 469                     isDir = ((statBuf.st_mode & S_IFMT) == S_IFDIR);
 470                 }
 471             }
 472 #if DEPLOYMENT_TARGET_LINUX
 473             fileURL = CFURLCreateFromFileSystemRepresentationRelativeToBase(alloc, (uint8_t *)dp->d_name, namelen, isDir, dirURL);
 474 #else
 475             fileURL = CFURLCreateFromFileSystemRepresentationRelativeToBase(alloc, (uint8_t *)dp->d_name, dp->d_namlen, isDir, dirURL);
 476 #endif
 477         } else {
 478 #if DEPLOYMENT_TARGET_LINUX
 479             fileURL = CFURLCreateFromFileSystemRepresentationRelativeToBase (alloc, (uint8_t *)dp->d_name, namelen, false, dirURL);
 480 #else
 481             fileURL = CFURLCreateFromFileSystemRepresentationRelativeToBase (alloc, (uint8_t *)dp->d_name, dp->d_namlen, false, dirURL);
 482 #endif
 483         }
 484         CFArrayAppendValue(files, fileURL);
 485         CFRelease(fileURL);
 486     }
 487     err = closedir(dirp);
 488     if (-1 != no_hang_fd) close(no_hang_fd);
 489     if (err != 0) {
 490         CFRelease(files);
 491         if (releaseBase) {
 492             CFRelease(dirURL);
 493         }
 494         if (extension) {
 495             CFRelease(extension);
 496         }
 497         return NULL;
 498     }
 499
 500 #else
 501
 502 #error _CFCreateContentsOfDirectory() unknown architecture, not implemented
 503
 504 #endif
 505
 506     if (extension) {
 507         CFRelease(extension);
 508     }
 509     if (releaseBase) {
 510         CFRelease(dirURL);
 511     }
 512     return files;
 513 }
 514
 515 CF_PRIVATE SInt32 _CFGetPathProperties(CFAllocatorRef alloc, char *path, Boolean *exists, SInt32 *posixMode, int64_t *size, CFDateRef *modTime, SInt32 *ownerID, CFArrayRef *dirContents) {
 516     Boolean fileExists;
 517     Boolean isDirectory = false;
 518
 519     if ((exists == NULL) && (posixMode == NULL) && (size == NULL) && (modTime == NULL) && (ownerID == NULL) && (dirContents == NULL)) {
 520         // Nothing to do.
 521         return 0;
 522     }
 523
 524     struct statinfo statBuf;
 525
 526     if (stat(path, &statBuf) != 0) {
 527         // stat failed, but why?
 528         if (thread_errno() == ENOENT) {
 529             fileExists = false;
 530         } else {
 531             return thread_errno();
 532         }
 533     } else {
 534         fileExists = true;
 535         isDirectory = ((statBuf.st_mode & S_IFMT) == S_IFDIR);
 536     }
 537
 538
 539     if (exists != NULL) {
 540         *exists = fileExists;
 541     }
 542
 543     if (posixMode != NULL) {
 544         if (fileExists) {
 545
 546             *posixMode = statBuf.st_mode;
 547
 548         } else {
 549             *posixMode = 0;
 550         }
 551     }
 552
 553     if (size != NULL) {
 554         if (fileExists) {
 555
 556             *size = statBuf.st_size;
 557
 558         } else {
 559             *size = 0;
 560         }
 561     }
 562
 563     if (modTime != NULL) {
 564         if (fileExists) {
 565 #if DEPLOYMENT_TARGET_WINDOWS || DEPLOYMENT_TARGET_LINUX
 566             struct timespec ts = {statBuf.st_mtime, 0};
 567 #else
 568             struct timespec ts = statBuf.st_mtimespec;
 569 #endif
 570             *modTime = CFDateCreate(alloc, _CFAbsoluteTimeFromFileTimeSpec(ts));
 571         } else {
 572             *modTime = NULL;
 573         }
 574     }
 575
 576     if (ownerID != NULL) {
 577         if (fileExists) {
 578
 579             *ownerID = statBuf.st_uid;
 580
 581         } else {
 582             *ownerID = -1;
 583         }
 584     }
 585
 586     if (dirContents != NULL) {
 587         if (fileExists && isDirectory) {
 588
 589             CFMutableArrayRef contents = _CFCreateContentsOfDirectory(alloc, (char *)path, NULL, NULL, NULL);
 590
 591             if (contents) {
 592                 *dirContents = contents;
 593             } else {
 594                 *dirContents = NULL;
 595             }
 596         } else {
 597             *dirContents = NULL;
 598         }
 599     }
 600     return 0;
 601 }
 602
 603 CF_PRIVATE SInt32 _CFGetFileProperties(CFAllocatorRef alloc, CFURLRef pathURL, Boolean *exists, SInt32 *posixMode, int64_t *size, CFDateRef *modTime, SInt32 *ownerID, CFArrayRef *dirContents) {
 604
 605     char path[CFMaxPathSize];
 606
 607     if (!CFURLGetFileSystemRepresentation(pathURL, true, (uint8_t *)path, CFMaxPathLength)) {
 608         return -1;
 609     }
 610
 611     return _CFGetPathProperties(alloc, path, exists, posixMode, size, modTime, ownerID, dirContents);
 612 }
 613
 614
 615 #if DEPLOYMENT_TARGET_WINDOWS
 616 #define WINDOWS_PATH_SEMANTICS
 617 #else
 618 #define UNIX_PATH_SEMANTICS
 619 #endif
 620
 621 #if defined(WINDOWS_PATH_SEMANTICS)
 622     #define CFPreferredSlash    ((UniChar)'\\')
 623     #define CFPreferredSlashStr CFSTR("\\")
 624 #elif defined(UNIX_PATH_SEMANTICS)
 625     #define CFPreferredSlash    ((UniChar)'/')
 626     #define CFPreferredSlashStr CFSTR("/")
 627 #else
 628     #error Cannot define NSPreferredSlash on this platform
 629 #endif
 630
 631 static Boolean _hasDrive(CFStringRef path) {
 632     if (CFStringGetLength(path) >= 2) {
 633         UniChar firstCharacters[2];
 634         firstCharacters[0] = CFStringGetCharacterAtIndex(path, 0);
 635         firstCharacters[1] = CFStringGetCharacterAtIndex(path, 1);
 636         if (firstCharacters[1] == ':' &&
 637             (('A' <= (firstCharacters)[0] && (firstCharacters)[0] <= 'Z') ||
 638              ('a' <= (firstCharacters)[0] && (firstCharacters)[0] <= 'z'))
 639             ) {
 640             return true;
 641         }
 642     }
 643     return false;
 644 }
 645
 646 static Boolean _hasNet(CFStringRef path) {
 647     if (CFStringGetLength(path) >= 2) {
 648         UniChar firstCharacters[2];
 649         firstCharacters[0] = CFStringGetCharacterAtIndex(path, 0);
 650         firstCharacters[1] = CFStringGetCharacterAtIndex(path, 1);
 651         if (firstCharacters[0] == '\\' && firstCharacters[1] == '\\') return true;
 652     }
 653     return false;
 654 }
 655
 656 #define HAS_DRIVE(S) ((S)[1] == ':' && (('A' <= (S)[0] && (S)[0] <= 'Z') || ('a' <= (S)[0] && (S)[0] <= 'z')))
 657 #define HAS_NET(S) ((S)[0] == '\\' && (S)[1] == '\\')
 658
 659 #if defined(WINDOWS_PATH_SEMANTICS)
 660     #define IS_SLASH(C) ((C) == '\\' || (C) == '/')
 661 #elif defined(UNIX_PATH_SEMANTICS)
 662     #define IS_SLASH(C) ((C) == '/')
 663 #endif
 664
 665 CF_PRIVATE UniChar _CFGetSlash() {
 666     return CFPreferredSlash;
 667 }
 668
 669 CF_PRIVATE CFStringRef _CFGetSlashStr() {
 670     return CFPreferredSlashStr;
 671 }
 672
 673 CF_PRIVATE Boolean _CFIsAbsolutePath(UniChar *unichars, CFIndex length) {
 674     if (length < 1) {
 675         return false;
 676     }
 677 #if defined(WINDOWS_PATH_SEMANTICS)
 678     if (unichars[0] == '~') {
 679         return true;
 680     }
 681     if (length < 2) {
 682         return false;
 683     }
 684     if (HAS_NET(unichars)) {
 685         return true;
 686     }
 687     if (length < 3) {
 688         return false;
 689     }
 690     if (IS_SLASH(unichars[2]) && HAS_DRIVE(unichars)) {
 691         return true;
 692     }
 693 #else
 694     if (unichars[0] == '~') {
 695         return true;
 696     }
 697     if (IS_SLASH(unichars[0])) {
 698         return true;
 699     }
 700 #endif
 701     return false;
 702 }
 703
 704 CF_PRIVATE Boolean _CFStripTrailingPathSlashes(UniChar *unichars, CFIndex *length) {
 705     Boolean destHasDrive = (1 < *length) && HAS_DRIVE(unichars);
 706     CFIndex oldLength = *length;
 707     while (((destHasDrive && 3 < *length) || (!destHasDrive && 1 < *length)) && IS_SLASH(unichars[*length - 1])) {
 708         (*length)--;
 709     }
 710     return (oldLength != *length);
 711 }
 712
 713 static Boolean _CFAppendTrailingPathSlash(UniChar *unichars, CFIndex *length, CFIndex maxLength) {
 714     if (maxLength < *length + 1) {
 715         return false;
 716     }
 717     switch (*length) {
 718         case 0:
 719             break;
 720         case 1:
 721             if (!IS_SLASH(unichars[0])) {
 722                 unichars[(*length)++] = CFPreferredSlash;
 723             }
 724             break;
 725         case 2:
 726             if (!HAS_DRIVE(unichars) && !HAS_NET(unichars)) {
 727                 unichars[(*length)++] = CFPreferredSlash;
 728             }
 729             break;
 730         default:
 731             unichars[(*length)++] = CFPreferredSlash;
 732             break;
 733     }
 734     return true;
 735 }
 736
 737 CF_PRIVATE void _CFAppendTrailingPathSlash2(CFMutableStringRef path) {
 738     static const UniChar slash[1] = { CFPreferredSlash };
 739     CFIndex len = CFStringGetLength(path);
 740     if (len == 0) {
 741         // Do nothing for this case
 742     } else if (len == 1) {
 743         UniChar character = CFStringGetCharacterAtIndex((CFStringRef)path, 0);
 744         if (!IS_SLASH(character)) {
 745             CFStringAppendCharacters(path, slash, 1);
 746         }
 747     } else if (len == 2) {
 748         if (!_hasDrive(path) && !_hasNet(path)) {
 749             CFStringAppendCharacters(path, slash, 1);
 750         }
 751     } else {
 752         CFStringAppendCharacters(path, slash, 1);
 753     }
 754 }
 755
 756 CF_PRIVATE void _CFAppendConditionalTrailingPathSlash2(CFMutableStringRef path) {
 757     static const UniChar slash[1] = { CFPreferredSlash };
 758     UniChar character = CFStringGetCharacterAtIndex((CFStringRef)path, CFStringGetLength(path) - 1);
 759     if (!IS_SLASH(character)) {
 760         CFStringAppendCharacters(path, slash, 1);
 761     }
 762 }
 763
 764 CF_PRIVATE void _CFAppendPathComponent2(CFMutableStringRef path, CFStringRef component) {
 765     _CFAppendTrailingPathSlash2(path);
 766     CFStringAppend(path, component);
 767 }
 768
 769 CF_PRIVATE Boolean _CFAppendPathComponent(UniChar *unichars, CFIndex *length, CFIndex maxLength, UniChar *component, CFIndex componentLength) {
 770     if (0 == componentLength) {
 771         return true;
 772     }
 773     if (maxLength < *length + 1 + componentLength) {
 774         return false;
 775     }
 776     _CFAppendTrailingPathSlash(unichars, length, maxLength);
 777     memmove(unichars + *length, component, componentLength * sizeof(UniChar));
 778     *length += componentLength;
 779     return true;
 780 }
 781
 782 CF_PRIVATE Boolean _CFAppendPathExtension2(CFMutableStringRef path, CFStringRef extension) {
 783     if (!path) {
 784         return false;
 785     }
 786
 787     if (0 < CFStringGetLength(extension) && IS_SLASH(CFStringGetCharacterAtIndex(extension, 0))) {
 788         return false;
 789     }
 790     if (1 < CFStringGetLength(extension)) {
 791         if (_hasDrive(extension)) return false;
 792     }
 793
 794     Boolean destHasDrive = (1 < CFStringGetLength(path)) && _hasDrive(path);
 795     while (((destHasDrive && 3 < CFStringGetLength(path)) || (!destHasDrive && 1 < CFStringGetLength(path))) && IS_SLASH(CFStringGetCharacterAtIndex(path, CFStringGetLength(path) - 1))) {
 796         CFStringDelete(path, CFRangeMake(CFStringGetLength(path) - 1, 1));
 797     }
 798
 799     if (CFStringGetLength(path) == 0) {
 800         return false;
 801     }
 802
 803     UniChar firstChar = CFStringGetCharacterAtIndex(path, 0);
 804     CFIndex newLength = CFStringGetLength(path);
 805     switch (newLength) {
 806         case 0:
 807             return false;
 808         case 1:
 809             if (IS_SLASH(firstChar) || firstChar == '~') {
 810                 return false;
 811             }
 812             break;
 813         case 2:
 814             if (_hasDrive(path) || _hasNet(path)) {
 815                 return false;
 816             }
 817             break;
 818         case 3:
 819             if (IS_SLASH(CFStringGetCharacterAtIndex(path, 2)) && _hasDrive(path)) {
 820                 return false;
 821             }
 822             break;
 823     }
 824     if (0 < newLength && firstChar == '~') {
 825         // Make sure we have a slash in the string
 826         if (!CFStringFindWithOptions(path, CFPreferredSlashStr, CFRangeMake(1, newLength - 1), 0, NULL)) {
 827             return false;
 828         }
 829     }
 830     static const UniChar dotChar = '.';
 831     CFStringAppendCharacters(path, &dotChar, 1);
 832     CFStringAppend(path, extension);
 833     return true;
 834 }
 835
 836 CF_PRIVATE Boolean _CFAppendPathExtension(UniChar *unichars, CFIndex *length, CFIndex maxLength, UniChar *extension, CFIndex extensionLength) {
 837     if (maxLength < *length + 1 + extensionLength) {
 838         return false;
 839     }
 840     if ((0 < extensionLength && IS_SLASH(extension[0])) || (1 < extensionLength && HAS_DRIVE(extension))) {
 841         return false;
 842     }
 843     _CFStripTrailingPathSlashes(unichars, length);
 844     switch (*length) {
 845     case 0:
 846         return false;
 847     case 1:
 848         if (IS_SLASH(unichars[0]) || unichars[0] == '~') {
 849             return false;
 850         }
 851         break;
 852     case 2:
 853         if (HAS_DRIVE(unichars) || HAS_NET(unichars)) {
 854             return false;
 855         }
 856         break;
 857     case 3:
 858         if (IS_SLASH(unichars[2]) && HAS_DRIVE(unichars)) {
 859             return false;
 860         }
 861         break;
 862     }
 863     if (0 < *length && unichars[0] == '~') {
 864         CFIndex idx;
 865         Boolean hasSlash = false;
 866         for (idx = 1; idx < *length; idx++) {
 867             if (IS_SLASH(unichars[idx])) {
 868                 hasSlash = true;
 869                 break;
 870             }
 871         }
 872         if (!hasSlash) {
 873             return false;
 874         }
 875     }
 876     unichars[(*length)++] = '.';
 877     memmove(unichars + *length, extension, extensionLength * sizeof(UniChar));
 878     *length += extensionLength;
 879     return true;
 880 }
 881
 882 CF_PRIVATE Boolean _CFTransmutePathSlashes(UniChar *unichars, CFIndex *length, UniChar replSlash) {
 883     CFIndex didx, sidx, scnt = *length;
 884     sidx = (1 < *length && HAS_NET(unichars)) ? 2 : 0;
 885     didx = sidx;
 886     while (sidx < scnt) {
 887         if (IS_SLASH(unichars[sidx])) {
 888             unichars[didx++] = replSlash;
 889             for (sidx++; sidx < scnt && IS_SLASH(unichars[sidx]); sidx++);
 890         } else {
 891             unichars[didx++] = unichars[sidx++];
 892         }
 893     }
 894     *length = didx;
 895     return (scnt != didx);
 896 }
 897
 898 CF_PRIVATE CFStringRef _CFCreateLastPathComponent(CFAllocatorRef alloc, CFStringRef path, CFIndex *slashIndex) {
 899     CFIndex len = CFStringGetLength(path);
 900     if (len < 2) {
 901         // Can't be any path components in a string this short
 902         if (slashIndex) *slashIndex = -1;
 903         return (CFStringRef)CFRetain(path);
 904     }
 905
 906     // Find the last slash
 907     for (CFIndex i = len - 1; i >= 0; i--) {
 908         if (IS_SLASH(CFStringGetCharacterAtIndex(path, i))) {
 909             if (slashIndex) *slashIndex = i;
 910             return CFStringCreateWithSubstring(alloc, path, CFRangeMake(i + 1, len - i - 1));
 911         }
 912     }
 913
 914     // Strip any drive if we have one
 915     if (len > 2 && _hasDrive(path)) {
 916         if (slashIndex) *slashIndex = -1;
 917         return CFStringCreateWithSubstring(alloc, path, CFRangeMake(2, len - 2));
 918     }
 919
 920     // No slash, so just return the same string
 921     if (slashIndex) *slashIndex = -1;
 922     return (CFStringRef)CFRetain(path);
 923 }
 924
 925 CF_PRIVATE CFIndex _CFStartOfLastPathComponent(UniChar *unichars, CFIndex length) {
 926     CFIndex idx;
 927     if (length < 2) {
 928         return 0;
 929     }
 930     for (idx = length - 1; idx; idx--) {
 931         if (IS_SLASH(unichars[idx - 1])) {
 932             return idx;
 933         }
 934     }
 935     if ((2 < length) && HAS_DRIVE(unichars)) {
 936         return 2;
 937     }
 938     return 0;
 939 }
 940
 941 CF_PRIVATE CFIndex _CFStartOfLastPathComponent2(CFStringRef path) {
 942     CFIndex length = CFStringGetLength(path);
 943     if (length < 2) {
 944         return 0;
 945     }
 946     for (CFIndex idx = length - 1; idx; idx--) {
 947         if (IS_SLASH(CFStringGetCharacterAtIndex(path, idx - 1))) {
 948             return idx;
 949         }
 950     }
 951     if ((2 < length && _hasDrive(path))) {
 952         return 2;
 953     }
 954     return 0;
 955 }
 956
 957 CF_PRIVATE CFIndex _CFLengthAfterDeletingLastPathComponent(UniChar *unichars, CFIndex length) {
 958     CFIndex idx;
 959     if (length < 2) {
 960         return 0;
 961     }
 962     for (idx = length - 1; idx; idx--) {
 963         if (IS_SLASH(unichars[idx - 1])) {
 964             if ((idx != 1) && (!HAS_DRIVE(unichars) || idx != 3)) {
 965                 return idx - 1;
 966             }
 967             return idx;
 968         }
 969     }
 970     if ((2 < length) && HAS_DRIVE(unichars)) {
 971         return 2;
 972     }
 973     return 0;
 974 }
 975
 976 CF_PRIVATE CFIndex _CFStartOfPathExtension2(CFStringRef path) {
 977     if (CFStringGetLength(path) < 2) {
 978         return 0;
 979     }
 980     Boolean hasDrive = _hasDrive(path);
 981     for (CFIndex idx = CFStringGetLength(path) - 1; idx; idx--) {
 982         UniChar thisCharacter = CFStringGetCharacterAtIndex(path, idx);
 983         if (IS_SLASH(thisCharacter)) {
 984             return 0;
 985         }
 986         if (thisCharacter != '.') {
 987             continue;
 988         }
 989         if (idx == 2 && hasDrive) {
 990             return 0;
 991         }
 992         return idx;
 993     }
 994     return 0;
 995 }
 996
 997 CF_PRIVATE CFIndex _CFStartOfPathExtension(UniChar *unichars, CFIndex length) {
 998     CFIndex idx;
 999     if (length < 2) {
1000         return 0;
1001     }
1002     for (idx = length - 1; idx; idx--) {
1003         if (IS_SLASH(unichars[idx - 1])) {
1004             return 0;
1005         }
1006         if (unichars[idx] != '.') {
1007             continue;
1008         }
1009         if (idx == 2 && HAS_DRIVE(unichars)) {
1010             return 0;
1011         }
1012         return idx;
1013     }
1014     return 0;
1015 }
1016
1017 CF_PRIVATE CFIndex _CFLengthAfterDeletingPathExtension2(CFStringRef path) {
1018     CFIndex start = _CFStartOfPathExtension2(path);
1019     return ((0 < start) ? start : CFStringGetLength(path));
1020 }
1021
1022 CF_PRIVATE CFIndex _CFLengthAfterDeletingPathExtension(UniChar *unichars, CFIndex length) {
1023     CFIndex start = _CFStartOfPathExtension(unichars, length);
1024     return ((0 < start) ? start : length);
1025 }
1026
1027 #if DEPLOYMENT_TARGET_WINDOWS
1028 #define DT_DIR           4
1029 #define DT_REG           8
1030 #define DT_LNK          10
1031 #endif
1032
1033 // NOTE: on Windows the filename is UTF16-encoded, the fileNameLen is result of wcslen. This function automatically skips '.' and '..', and '._' files
1034 CF_PRIVATE void _CFIterateDirectory(CFStringRef directoryPath, Boolean (^fileHandler)(CFStringRef fileName, uint8_t fileType)) {
1035     char directoryPathBuf[CFMaxPathSize];
1036     if (!CFStringGetFileSystemRepresentation(directoryPath, directoryPathBuf, CFMaxPathSize)) return;
1037
1038 #if DEPLOYMENT_TARGET_WINDOWS
1039     CFIndex cpathLen = strlen(directoryPathBuf);
1040     // Make sure there is room for the additional space we need in the win32 api
1041     if (cpathLen + 2 < CFMaxPathSize) {
1042         WIN32_FIND_DATAW file;
1043         HANDLE handle;
1044
1045         directoryPathBuf[cpathLen++] = '\\';
1046         directoryPathBuf[cpathLen++] = '*';
1047         directoryPathBuf[cpathLen] = '\0';
1048
1049         // Convert UTF8 buffer to windows appropriate UTF-16LE
1050         // Get the real length of the string in UTF16 characters
1051         CFStringRef cfStr = CFStringCreateWithCString(kCFAllocatorSystemDefault, directoryPathBuf, kCFStringEncodingUTF8);
1052         cpathLen = CFStringGetLength(cfStr);
1053         // Allocate a wide buffer to hold the converted string, including space for a NULL terminator
1054         wchar_t *wideBuf = (wchar_t *)malloc((cpathLen + 1) * sizeof(wchar_t));
1055         // Copy the string into the buffer and terminate
1056         CFStringGetCharacters(cfStr, CFRangeMake(0, cpathLen), (UniChar *)wideBuf);
1057         wideBuf[cpathLen] = 0;
1058         CFRelease(cfStr);
1059
1060         handle = FindFirstFileW(wideBuf, (LPWIN32_FIND_DATAW)&file);
1061         if (handle != INVALID_HANDLE_VALUE) {
1062             do {
1063                 CFIndex nameLen = wcslen(file.cFileName);
1064                 if (file.cFileName[0] == '.' && (nameLen == 1 || (nameLen == 2  && file.cFileName[1] == '.'))) {
1065                     continue;
1066                 }
1067
1068                 CFStringRef fileName = CFStringCreateWithBytes(kCFAllocatorSystemDefault, (const uint8_t *)file.cFileName, nameLen * sizeof(wchar_t), kCFStringEncodingUTF16, NO);
1069                 if (!fileName) {
1070                     continue;
1071                 }
1072
1073                 Boolean isDirectory = file.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY;
1074                 Boolean result = fileHandler(fileName, isDirectory ? DT_DIR : DT_REG);
1075                 CFRelease(fileName);
1076                 if (!result) break;
1077             } while (FindNextFileW(handle, &file));
1078
1079             FindClose(handle);
1080         }
1081         free(wideBuf);
1082     }
1083 #else
1084     DIR *dirp;
1085     struct dirent *dent;
1086     if ((dirp = opendir(directoryPathBuf))) {
1087         while ((dent = readdir(dirp))) {
1088 #if DEPLOYMENT_TARGET_LINUX
1089             CFIndex nameLen = strlen(dent->d_name);
1090 #else
1091             CFIndex nameLen = dent->d_namlen;
1092 #endif
1093             if (0 == nameLen || 0 == dent->d_fileno || ('.' == dent->d_name[0] && (1 == nameLen || (2 == nameLen && '.' == dent->d_name[1]) || '_' == dent->d_name[1]))) {
1094                 continue;
1095             }
1096
1097             CFStringRef fileName = CFStringCreateWithFileSystemRepresentation(kCFAllocatorSystemDefault, dent->d_name);
1098             if (!fileName) {
1099                 continue;
1100             }
1101
1102             Boolean result = fileHandler(fileName, dent->d_type);
1103             CFRelease(fileName);
1104             if (!result) break;
1105         }
1106         (void)closedir(dirp);
1107     }
1108 #endif
1109 }
1110