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// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
package clientupdate
import (
"context"
"errors"
"fmt"
"github.com/coreos/go-systemd/v22/dbus"
)
func restartSystemdUnit(ctx context.Context) error {
c, err := dbus.NewWithContext(ctx)
if err != nil {
// Likely not a systemd-managed distro.
return errors.ErrUnsupported
}
defer c.Close()
if err := c.ReloadContext(ctx); err != nil {
return fmt.Errorf("failed to reload tailsacled.service: %w", err)
}
ch := make(chan string, 1)
if _, err := c.RestartUnitContext(ctx, "tailscaled.service", "replace", ch); err != nil {
return fmt.Errorf("failed to restart tailsacled.service: %w", err)
}
select {
case res := <-ch:
if res != "done" {
return fmt.Errorf("systemd service restart failed with result %q", res)
}
case <-ctx.Done():
return ctx.Err()
}
return nil
}
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