fix shutdown loop -- have to ignore SIGHUP

cmd/main-server.go

@@ -9,6 +9,7 @@ import (
 	"log"
 	"net/http"
 	"os"
+	"os/signal"
 	"runtime/debug"
 	"strconv"
 	"strings"
@@ -451,8 +452,10 @@ func stdinReadWatch() {
 		if err != nil {
 			log.Printf("[prompt] stdin closed/error, shutting down: %v\n", err)
 			sendTelemetryWrapper()
-			time.Sleep(1 * time.Second)
+			log.Printf("[prompt] closing db connection\n")
+			sstore.CloseDB()
 			log.Printf("[prompt] *** shutting down local server\n")
+			time.Sleep(1 * time.Second)
 			syscall.Kill(syscall.Getpid(), syscall.SIGINT)
 			break
 		}
@@ -461,6 +464,17 @@ func stdinReadWatch() {
 	syscall.Kill(syscall.Getpid(), syscall.SIGKILL)
 }
 
+// ignore SIGHUP
+func installSignalHandlers() {
+	sigCh := make(chan os.Signal, 1)
+	signal.Notify(sigCh, syscall.SIGHUP)
+	go func() {
+		for sig := range sigCh {
+			fmt.Printf("[prompt] got signal %v (ignoring)\n", sig)
+		}
+	}()
+}
+
 func main() {
 	scbase.BuildTime = BuildTime
 
@@ -537,6 +551,7 @@ func main() {
 	if err != nil {
 		log.Printf("[error] updating activity: %v\n", err)
 	}
+	installSignalHandlers()
 	go telemetryLoop()
 	go stdinReadWatch()
 	go runWebSocketServer()

pkg/sstore/sstore.go

@@ -117,6 +117,19 @@ func GetDB(ctx context.Context) (*sqlx.DB, error) {
 	return globalDB, globalDBErr
 }
 
+func CloseDB() {
+	globalDBLock.Lock()
+	defer globalDBLock.Unlock()
+	if globalDB == nil {
+		return
+	}
+	err := globalDB.Close()
+	if err != nil {
+		log.Printf("[db] error closing database: %v\n", err)
+	}
+	globalDB = nil
+}
+
 type ClientWinSizeType struct {
 	Width      int  `json:"width"`
 	Height     int  `json:"height"`