fix: Terminal emulation used by SSH sessions (#3473)

Fixes #3371

pty/start.go

@@ -4,8 +4,22 @@ import (
 	"os/exec"
 )
 
+// StartOption represents a configuration option passed to Start.
+type StartOption func(*startOptions)
+
+type startOptions struct {
+	ptyOpts []Option
+}
+
+// WithPTYOption applies the given options to the underlying PTY.
+func WithPTYOption(opts ...Option) StartOption {
+	return func(o *startOptions) {
+		o.ptyOpts = append(o.ptyOpts, opts...)
+	}
+}
+
 // Start the command in a TTY.  The calling code must not use cmd after passing it to the PTY, and
 // instead rely on the returned Process to manage the command/process.
-func Start(cmd *exec.Cmd) (PTY, Process, error) {
-	return startPty(cmd)
+func Start(cmd *exec.Cmd, opt ...StartOption) (PTY, Process, error) {
+	return startPty(cmd, opt...)
 }