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.
struct statinfo statBuf;
*bytes = NULL;
int no_hang_fd = openAutoFSNoWait();
*fd = open(path, O_RDONLY|extraOpenFlags|CF_OPENFLGS, 0666);
if (*fd < 0) {
closeAutoFSNoWait(no_hang_fd);
return false;
}
if (fstat(*fd, &statBuf) < 0) {
int saveerr = thread_errno();
close(*fd);
*fd = -1;
closeAutoFSNoWait(no_hang_fd);
thread_set_errno(saveerr);
return false;
}
if ((statBuf.st_mode & S_IFMT) != S_IFREG) {
close(*fd);
*fd = -1;
closeAutoFSNoWait(no_hang_fd);
thread_set_errno(EACCES);
return false;
}
if (statBuf.st_size == 0) {
*bytes = CFAllocatorAllocate(alloc, 4, 0); // don't return constant string -- it's freed!
if (__CFOASafe) __CFSetLastAllocationEventName(*bytes, "CFUtilities (file-bytes)");
*length = 0;
} else {
CFIndex desiredLength;
if ((maxLength >= statBuf.st_size) || (maxLength == 0)) {
desiredLength = statBuf.st_size;
} else {
desiredLength = maxLength;
}
*bytes = CFAllocatorAllocate(alloc, desiredLength, 0);
if (!bytes) {
close(*fd);
*fd = -1;
closeAutoFSNoWait(no_hang_fd);
return false;
}
if (__CFOASafe) __CFSetLastAllocationEventName(*bytes, "CFUtilities (file-bytes)");
// fcntl(fd, F_NOCACHE, 1);
if (read(*fd, *bytes, desiredLength) < 0) {
CFAllocatorDeallocate(alloc, *bytes);
close(*fd);
*fd = -1;
closeAutoFSNoWait(no_hang_fd);
return false;
}
*length = desiredLength;
}
closeAutoFSNoWait(no_hang_fd);
return true;
}
__private_extern__ Boolean _CFWriteBytesToFile(CFURLRef url, const void *bytes, CFIndex length) {
int fd = -1;
int mode;
struct statinfo statBuf;
char path[CFMaxPathSize];
if (!CFURLGetFileSystemRepresentation(url, true, (uint8_t *)path, CFMaxPathSize)) {
return false;
}
int no_hang_fd = openAutoFSNoWait();
mode = 0666;
if (0 == stat(path, &statBuf)) {
mode = statBuf.st_mode;
} else if (thread_errno() != ENOENT) {
closeAutoFSNoWait(no_hang_fd);
return false;
}
fd = open(path, O_WRONLY|O_CREAT|O_TRUNC|CF_OPENFLGS, 0666);
if (fd < 0) {
closeAutoFSNoWait(no_hang_fd);
return false;
}
if (length && write(fd, bytes, length) != length) {
int saveerr = thread_errno();
close(fd);
closeAutoFSNoWait(no_hang_fd);
thread_set_errno(saveerr);
return false;
}
#if DEPLOYMENT_TARGET_WINDOWS
FlushFileBuffers((HANDLE)_get_osfhandle(fd));
#else
fsync(fd);
#endif
close(fd);
closeAutoFSNoWait(no_hang_fd);
return true;
}
__private_extern__ Boolean _CFDeleteFile(const char *path) {
int no_hang_fd = openAutoFSNoWait();
int ret = unlink(path) == 0;
closeAutoFSNoWait(no_hang_fd);
return ret;
}
__private_extern__ Boolean _CFRemoveDirectory(const char *path) {
int no_hang_fd = openAutoFSNoWait();
int ret = ((rmdir(path) == 0) ? true : false);
closeAutoFSNoWait(no_hang_fd);
return ret;
}
CF_PRIVATE Boolean _CFDeleteFile(const char *path) {
int no_hang_fd = openAutoFSNoWait();
int ret = unlink(path) == 0;
closeAutoFSNoWait(no_hang_fd);
return ret;
}
CF_PRIVATE Boolean _CFCreateDirectory(const char *path) {
int no_hang_fd = openAutoFSNoWait();
int ret = ((mkdir(path, 0777) == 0) ? true : false);
closeAutoFSNoWait(no_hang_fd);
return ret;
}