Prototype with single host server and no admin panel (#2)

Reviewed-on: wrenn/sandbox#2
Co-authored-by: pptx704 <rafeed@omukk.dev>
Co-committed-by: pptx704 <rafeed@omukk.dev>

envd/internal/services/process/update.go

@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: Apache-2.0
+
+package process
+
+import (
+	"context"
+	"fmt"
+
+	"connectrpc.com/connect"
+	"github.com/creack/pty"
+
+	rpc "git.omukk.dev/wrenn/sandbox/envd/internal/services/spec/process"
+)
+
+func (s *Service) Update(_ context.Context, req *connect.Request[rpc.UpdateRequest]) (*connect.Response[rpc.UpdateResponse], error) {
+	proc, err := s.getProcess(req.Msg.GetProcess())
+	if err != nil {
+		return nil, err
+	}
+
+	if req.Msg.GetPty() != nil {
+		err := proc.ResizeTty(&pty.Winsize{
+			Rows: uint16(req.Msg.GetPty().GetSize().GetRows()),
+			Cols: uint16(req.Msg.GetPty().GetSize().GetCols()),
+		})
+		if err != nil {
+			return nil, connect.NewError(connect.CodeInternal, fmt.Errorf("error resizing tty: %w", err))
+		}
+	}
+
+	return connect.NewResponse(&rpc.UpdateResponse{}), nil
+}