Try to force OpenJDK to use /dev/urandom.

See jruby/jruby#4685 and many others.

Author: headius

argparser.cpp

@@ -244,6 +244,16 @@ bool ArgParser::parseArgs(int argc, char *argv[]) {
         javaOptions.push_back("-Dfile.encoding=UTF-8");
     }
 #endif
+
+    // Force OpenJDK-based JVMs to use /dev/urandom for random number generation
+    // See https://github.com/jruby/jruby/issues/4685 among others.
+    struct stat buffer;
+    if (stat("/dev/urandom", &buffer) == 0) {
+        // OpenJDK tries really hard to prevent you from using urandom.
+        // See https://bugs.openjdk.java.net/browse/JDK-6202721
+        javaOptions.push_back("-Djava.security.egd=/dev/./urandom");
+    }
+
     if (getenv("VERIFY_JRUBY") != NULL) {
         noBootClassPath = true;
     }

lib/jruby-launcher.rb

@@ -1,3 +1,3 @@
 module JRubyLauncher
-  VERSION = "1.1.2"
+  VERSION = "1.1.3"
 end

version.h

@@ -6,6 +6,6 @@
 #ifndef _VERSION_H_
 #define _VERSION_H_
 
-#define JRUBY_LAUNCHER_VERSION "1.1.2"
+#define JRUBY_LAUNCHER_VERSION "1.1.3"
 
 #endif // ! _VERSION_H_