Fixed careless mistakes

openwrt_backup/retrieve.py

@@ -7,13 +7,14 @@ from utils import exec_remote
 
 def make_backup_on_remote(client: SSHClient, tmp_path: Path):
     cmdline = ["sysupgrade", "-b"]
-    remote_dest = tmp_path / "backup_latest.tar.gz"
+    remote_dest = tmp_path / "backup_latest.openwrt_backup.tar.gz"
     cmdline.append(remote_dest)
-    exec_remote(cmdline)
+    exec_remote(client, cmdline)
     return remote_dest
 
 
 def retrieve_backup_on_remote(client: SSHClient, src: Path, dest: Path):
     sftp_client = client.open_sftp()
+    src, dest = map(str, (src, dest))
     sftp_client.get(src, dest)
     sftp_client.remove(src)