public static unsafe void WriteFileHeader(FileHeader *header, VoronPathSetting path)
{
var fd = Syscall.open(path.FullPath, OpenFlags.O_WRONLY | PerPlatformValues.OpenFlags.O_CREAT,
FilePermissions.S_IWUSR | FilePermissions.S_IRUSR);
try
{
if (fd == -1)
{
var err = Marshal.GetLastWin32Error();
Syscall.ThrowLastError(err, "when opening " + path);
}
int remaining = sizeof(FileHeader);
var ptr = ((byte *)header);
while (remaining > 0)
{
var written = Syscall.write(fd, ptr, (ulong)remaining);
if (written == -1)
{
var err = Marshal.GetLastWin32Error();
Syscall.ThrowLastError(err, "writing to " + path);
}
remaining -= (int)written;
ptr += written;
}
if (Syscall.FSync(fd) == -1)
{
var err = Marshal.GetLastWin32Error();
Syscall.ThrowLastError(err, "FSync " + path);
}
Syscall.FsyncDirectoryFor(path.FullPath);
}
finally
{
if (fd != -1)
{
Syscall.close(fd);
fd = -1;
}
}
}
public void Truncate(long size)
{
var result = Syscall.ftruncate(_fd, (IntPtr)size);
if (result == -1)
{
var err = Marshal.GetLastWin32Error();
Syscall.ThrowLastError(err, "when truncating " + _filename);
}
result = Syscall.FSync(_fd);
if (result == -1)
{
var err = Marshal.GetLastWin32Error();
Syscall.ThrowLastError(err, "when fsycning " + _filename);
}
if (Syscall.CheckSyncDirectoryAllowed(_filename.FullPath) && Syscall.SyncDirectory(_filename.FullPath) == -1)
{
var err = Marshal.GetLastWin32Error();
Syscall.ThrowLastError(err, "when syncing dir for " + _filename);
}
}