public static LocalIdentifierLock GetIdentifierForNameAndLock(string category, string name)
{
NodeID nodeid = null;
if (!Regex.IsMatch(name, "^[a-zA-Z][a-zA-Z0-9_\\.\\-]*$"))
{
throw new ArgumentException("\"" + name + "\" is an invalid identifier name");
}
category = category.ToLowerInvariant();
var storage_path = GetUserIdentifierStoragePath();
Directory.CreateDirectory(Path.Combine(storage_path, category));
string p = Path.Combine(storage_path, category, name);
bool is_windows = RuntimeInformation.IsOSPlatform(OSPlatform.Windows);
LocalIdentifierFD fd = null;
LocalIdentifierFD fd_run = null;
try
{
if (is_windows)
{
fd = new LocalIdentifierFD();
int error_code;
if (!fd.OpenLockWrite(p, false, out error_code))
{
if (error_code == 32)
{
throw new InvalidOperationException("Identifier already in use");
}
throw new SystemResourceException("Could not initialize local identifiers");
}
}
else
{
string p_lock = Path.Combine(GetUserRunPath(), "identifiers");
Directory.CreateDirectory(p_lock);
p_lock = Path.Combine(p_lock, category);
Directory.CreateDirectory(p_lock);
p_lock = Path.Combine(p_lock, name + ".pid");
fd_run = new LocalIdentifierFD();
int open_run_err;
if (!fd_run.OpenLockWrite(p_lock, false, out open_run_err))
{
if (open_run_err == (int)Mono.Unix.Native.Errno.ENOLCK)
{
throw new InvalidOperationException("Identifier already in use");
}
throw new SystemResourceException("Could not initialize local identifiers");
}
string pid_str = Process.GetCurrentProcess().Id.ToString();
if (!fd_run.Write(pid_str))
{
throw new SystemResourceException("Could not initialize local identifiers");
}
fd = new LocalIdentifierFD();
int open_err;
if (!fd.OpenLockWrite(p, false, out open_err))
{
if (open_err == (int)Mono.Unix.Native.Errno.EROFS)
{
open_err = 0;
if (!fd.OpenRead(p, out open_err))
{
throw new InvalidOperationException("LocalTransport NodeID not set on read only filesystem");
}
}
else
{
throw new SystemResourceException("Could not initialize LocalTransport server");
}
}
}
int len = fd.FileLen;
if (len == 0 || len == -1 || len > 16 * 1024)
{
nodeid = NodeID.NewUniqueID();
string dat = nodeid.ToString();
fd.Write(dat);
}
else
{
string nodeid_str;
fd.Read(out nodeid_str);
try
{
nodeid_str = nodeid_str.Trim();
nodeid = new NodeID(nodeid_str);
}
catch (Exception)
{
throw new IOException("Error in identifier settings file");
}
}
var ident_uuid = new UUID()
{
uuid_bytes = nodeid.ToByteArray()
};
var ident = new Identifier()
{
name = name, uuid = ident_uuid
};
if (is_windows)
{
return(new LocalIdentifierLock(ident, fd));
}
else
{
fd?.Dispose();
return(new LocalIdentifierLock(ident, fd_run));
}
}
catch (Exception)
{
fd?.Dispose();
fd_run?.Dispose();
throw;
}
}
internal LocalIdentifierLock(Identifier id, LocalIdentifierFD fd)
{
this.fd = fd;
this.Identifier = id;
}
