prevent remount during exit to avoid killing 9pfuse

main.go

@@ -9,12 +9,14 @@ import (
 	"sort"
 	"strings"
 	"sync"
+	"sync/atomic"
 	"time"
 
 	"9fans.net/go/acme"
 )
 
 var ollie string
+var exiting atomic.Bool
 
 func init() {
 	ollie = os.Getenv("OLLIE")
@@ -24,6 +26,9 @@ func init() {
 }
 
 func remount() {
+	if exiting.Load() {
+		return
+	}
 	exec.Command("ollie-remount").Run() //nolint:errcheck
 }
 
@@ -164,6 +169,7 @@ func (sl *sessionList) eventLoop() {
 			sl.win.WriteEvent(e)
 		}
 	}
+	exiting.Store(true)
 	os.Exit(0)
 }