/// <inheritdoc />
public async Task <IBackgroundTransfer> CreateAsync(
IUnixDirectoryEntry targetDirectory,
string fileName,
Stream data,
CancellationToken cancellationToken)
{
var targetInfo = ((UnixDirectoryEntry)targetDirectory).Info;
var fileInfo = new UnixFileInfo(UnixPath.Combine(targetInfo.FullName, fileName));
var stream = fileInfo.Open(FileMode.CreateNew, FileAccess.Write, FilePermissions.DEFFILEMODE);
/* Must be ConfigureAwait(true) to stay in the same synchronization context. */
await data.CopyToAsync(stream, 81920, cancellationToken)
.ConfigureAwait(true);
return(null);
}
void InitFileLock()
{
var lockDirectory = GetFileLockDirectory();
if (!Directory.Exists(lockDirectory))
{
Directory.CreateDirectory(lockDirectory);
}
var lockFile = Path.Combine(lockDirectory, Identifier);
FirstInstanceFileInfo = new UnixFileInfo(lockFile);
try {
FirstInstanceFileStream = FirstInstanceFileInfo.Open(
OpenFlags.O_CREAT | OpenFlags.O_EXCL,
FilePermissions.S_IRWXU
);
IsFirstInstance = true;
} catch (Exception) {
IsFirstInstance = false;
}
if (IsFirstInstance)
{
// managed shutdown
AppDomain.CurrentDomain.ProcessExit += (sender, e) => {
ReleaseFileLock();
};
// signal handlers
UnixSignal[] shutdown_signals =
{
new UnixSignal(Signum.SIGINT),
new UnixSignal(Signum.SIGTERM),
};
UnixSignalThread = new Thread(() => {
UnixSignal.WaitAny(shutdown_signals);
ReleaseFileLock();
});
UnixSignalThread.IsBackground = true;
UnixSignalThread.Start();
}
}
