Merge pull request #3152 from MichaelEischer/fix-backup-background-hang

backup: Fix shutdown hang when running in the background on linux

changelog/unreleased/pull-3152

@@ -0,0 +1,8 @@
+Bugfix: On Linux `backup` hangs during exit when run as a background job
+
+On Linux, when running in the background restic failed to stop the terminal
+output of the `backup` command after it had completed. This caused restic to
+hang until moved to the foreground. This has been fixed.
+
+https://github.com/restic/restic/pull/3152
+https://forum.restic.net/t/restic-alpine-container-cron-hangs-epoll-pwait/3334

internal/ui/termstatus/status.go

@@ -96,11 +96,9 @@ func (t *Terminal) run(ctx context.Context) {
 	for {
 		select {
 		case <-ctx.Done():
-			if IsProcessBackground(t.fd) {
+			if !IsProcessBackground(t.fd) {
-				// ignore all messages, do nothing, we are in the background process group
+				t.undoStatus(len(status))
-				continue
 			}
-			t.undoStatus(len(status))
 
 			return