Added warning when fuse_main return code is not 0 (#413)

Co-authored-by: Missael Palacios <missaelpalacios@ibm.com>

Author: amissael95

messages/bin_ltfs/root.txt

@@ -153,7 +153,8 @@ root:table {
 		14114E:string { "Cannot initialize the open file table." }
 		14115E:string { "Invalid scsi_append_only_mode option: %s." }
                 14116E:string { "This medium is not supported (%d)." }
-
+		14123W:string { "The main function of FUSE returned error (%d)." }
+		
 		// 14150 - 14199 are reserved for LE+
 
 		// Help messages

src/main.c

@@ -1242,6 +1242,9 @@ int single_drive_main(struct fuse_args *args, struct ltfs_fuse_data *priv)
 	ltfsmsg(LTFS_INFO, 14112I);
 	ltfsmsg(LTFS_INFO, 14113I);
 	ret = fuse_main(args->argc, args->argv, &ltfs_ops, priv);
+	if (ret != 0) {
+		ltfsmsg(LTFS_WARN, 14123W, ret);
+	}
 
 	/*  Setup signal handler again to terminate cleanly */
 	ret = ltfs_set_signal_handlers();