added license info to source

1 files changed, 14 insertions, 0 deletions

diff --git a/src/main.rs b/src/main.rs
index 39c6117..8fcac37 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,17 @@
+/*
+   This program is free software: you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published by the Free
+   Software Foundation; either version 3 of the License, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful, but WITHOUT
+   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+   FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+   more details.
+
+   You should have received a copy of the GNU General Public License along
+   with this program. If not, see https://www.gnu.org/licenses/.
+*/
 use std::env;
 use std::fs::File;
 use std::process;