Add check for io.popen modes.

2019-10-13 06:16:21 +03:00
parent 6efb6f000e
commit edfe1a5fde
1 changed files with 1 additions and 0 deletions
--- a/src/core/org/luaj/vm2/lib/IoLib.java
+++ b/src/core/org/luaj/vm2/lib/IoLib.java
@@ -386,6 +386,7 @@ public class IoLib extends TwoArgFunction {

 	// io.popen(prog, [mode]) -> file
 	public Varargs _io_popen(String prog, String mode) throws IOException {
+		if (!"r".equals(mode) && !"w".equals(mode)) argerror(2, "invalid value: '" + mode + "'; must be one of 'r' or 'w'");
 		return openProgram(prog, mode);
 	}