[Issue #203] Fix

Author: gsmolk

src/backup.c

@@ -352,9 +352,6 @@ do_backup_instance(PGconn *backup_conn, PGNodeInfo *nodeInfo, bool no_sync)
 			dir_list_file(backup_files_list, parray_get(external_dirs, i),
 						  false, true, false, i+1, FIO_DB_HOST);
 
-	/* close ssh session in main thread */
-	fio_disconnect();
-
 	/* Sanity check for backup_files_list, thank you, Windows:
 	 * https://github.com/postgrespro/pg_probackup/issues/48
 	 */
@@ -529,6 +526,9 @@ do_backup_instance(PGconn *backup_conn, PGNodeInfo *nodeInfo, bool no_sync)
 		arg->ret = 1;
 	}
 
+	/* close ssh session in main thread */
+	fio_disconnect();
+
 	/* Run threads */
 	thread_interrupted = false;
 	elog(INFO, "Start transferring data files");

src/utils/file.c

@@ -368,6 +368,7 @@ int fio_open(char const* path, int mode, fio_location location)
 		if (hdr.arg != 0)
 		{
 			errno = hdr.arg;
+			fio_fdset &= ~(1 << hdr.handle);
 			return -1;
 		}
 		fd = i | FIO_PIPE_MARKER;