diff --git a/shrlok/shrlok.py b/shrlok/shrlok.py
index a40f9b1..273333b 100644
--- a/shrlok/shrlok.py
+++ b/shrlok/shrlok.py
@@ -48,6 +48,9 @@ class Handler(socketserver.StreamRequestHandler):
             print("Unknown type.")
             return
 
+        if not file_name:
+            return
+
         print(f"{len(data)} bytes — {header} — '{file_name}'.")
         self.request.sendall(file_name.encode())
 
@@ -57,7 +60,8 @@ def write_text(data: bytes, title=None):
     html = HTML_TEMPLATE.format(title=title or "?", content=content)
     path = str(Path(ARGS.root) / "txt")
     if not os.path.isdir(path):
-        os.makedirs(path)
+        print(f"Missing '{path}' folder.")
+        return None
     with tempfile.NamedTemporaryFile(
             mode="wt",
             dir=path,
@@ -65,19 +69,27 @@ def write_text(data: bytes, title=None):
             delete=False
     ) as output_file:
         output_file.write(html)
+        os.chmod(output_file.name, 0o644)
         return output_file.name
 
 
 def main():
-    argp = argparse.ArgumentParser()
+    argp = argparse.ArgumentParser(description="Share stuff through a socket.")
     argp.add_argument("root", help="root path where to put files")
+    argp.add_argument("-s", "--socket", help="socket path")
     global ARGS
     ARGS = argp.parse_args()
 
-    uid = os.getuid()
-    socket_path = f"/run/user/{uid}/shr.sock"
+    socket_path = ARGS.socket
+    if not socket_path:
+        runtime_dir = os.environ.get("RUNTIME_DIRECTORY")
+        if not runtime_dir:
+            exit("No socket path nor runtime directory specified.")
+        socket_path = os.path.join(runtime_dir, "shr.sock")
+    print("Socket path:", socket_path)
     if os.path.exists(socket_path):
         os.unlink(socket_path)
+
     try:
         with socketserver.UnixStreamServer(socket_path, Handler) as server:
             server.serve_forever()