Index: uspace/lib/libc/generic/vfs/vfs.c
===================================================================
--- uspace/lib/libc/generic/vfs/vfs.c	(revision 231438126d2f4a823b7106c694ea8eecf2d00e54)
+++ uspace/lib/libc/generic/vfs/vfs.c	(revision 210e50a2e64696e25acdb6745a857a8b4862ecdd)
@@ -125,13 +125,35 @@
 	aid_t req;
 	dev_handle_t dev_handle;
+	int null_id = -1;
+	char null[DEVMAP_NAME_MAXLEN];
+	
+	if (str_cmp(fqdn, "") == 0) {
+		/* No device specified, create a fresh
+		   null/%d device instead */
+		null_id = devmap_null_create();
+		
+		if (null_id == -1)
+			return ENOMEM;
+		
+		snprintf(null, DEVMAP_NAME_MAXLEN, "null/%d", null_id);
+		fqdn = null;
+	}
 	
 	res = devmap_device_get_handle(fqdn, &dev_handle, flags);
-	if (res != EOK)
+	if (res != EOK) {
+		if (null_id != -1)
+			devmap_null_destroy(null_id);
+		
 		return res;
+	}
 	
 	size_t mpa_size;
 	char *mpa = absolutize(mp, &mpa_size);
-	if (!mpa)
-		return ENOMEM;
+	if (!mpa) {
+		if (null_id != -1)
+			devmap_null_destroy(null_id);
+		
+		return ENOMEM;
+	}
 	
 	futex_down(&vfs_phone_futex);
@@ -146,4 +168,8 @@
 		futex_up(&vfs_phone_futex);
 		free(mpa);
+		
+		if (null_id != -1)
+			devmap_null_destroy(null_id);
+		
 		if (rc_orig == EOK)
 			return (int) rc;
@@ -158,10 +184,14 @@
 		futex_up(&vfs_phone_futex);
 		free(mpa);
-		if (rc_orig == EOK)
-			return (int) rc;
-		else
-			return (int) rc_orig;
-	}
-
+		
+		if (null_id != -1)
+			devmap_null_destroy(null_id);
+		
+		if (rc_orig == EOK)
+			return (int) rc;
+		else
+			return (int) rc_orig;
+	}
+	
 	rc = async_data_write_start(vfs_phone, (void *) fs_name, str_size(fs_name));
 	if (rc != EOK) {
@@ -170,10 +200,14 @@
 		futex_up(&vfs_phone_futex);
 		free(mpa);
-		if (rc_orig == EOK)
-			return (int) rc;
-		else
-			return (int) rc_orig;
-	}
-
+		
+		if (null_id != -1)
+			devmap_null_destroy(null_id);
+		
+		if (rc_orig == EOK)
+			return (int) rc;
+		else
+			return (int) rc_orig;
+	}
+	
 	/* Ask VFS whether it likes fs_name. */
 	rc = async_req_0_0(vfs_phone, IPC_M_PING);
@@ -183,4 +217,8 @@
 		futex_up(&vfs_phone_futex);
 		free(mpa);
+		
+		if (null_id != -1)
+			devmap_null_destroy(null_id);
+		
 		if (rc_orig == EOK)
 			return (int) rc;
@@ -193,4 +231,7 @@
 	futex_up(&vfs_phone_futex);
 	free(mpa);
+	
+	if ((rc != EOK) && (null_id != -1))
+		devmap_null_destroy(null_id);
 	
 	return (int) rc;