The C, C++, Java, Python language bindings has been changed to run in a chroot jail for additional security.

Closes #2

Author: ngsankha

codejudge-compiler/src/codejudge/compiler/languages/C.java

@@ -52,6 +52,7 @@ public void execute() {
 			// create the execution script
 			BufferedWriter out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(dir + "/run.sh")));
 			out.write("cd \"" + dir +"\"\n");
+			out.write("chroot .\n");
 			out.write("./a.out < in.txt > out.txt");
 			out.close();
 			Runtime r = Runtime.getRuntime();

codejudge-compiler/src/codejudge/compiler/languages/Cpp.java

@@ -52,6 +52,7 @@ public void execute() {
 			// create the execution script
 			BufferedWriter out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(dir + "/run.sh")));
 			out.write("cd \"" + dir +"\"\n");
+			out.write("chroot .\n");
 			out.write("./a.out < in.txt > out.txt");
 			out.close();
 			Runtime r = Runtime.getRuntime();

codejudge-compiler/src/codejudge/compiler/languages/Java.java

@@ -52,6 +52,7 @@ public void execute() {
 			// create the execution script
 			BufferedWriter out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(dir + "/run.sh")));
 			out.write("cd \"" + dir +"\"\n");
+			out.write("chroot .\n");
 			out.write("java " + file.substring(0, file.length() - 5) + " < in.txt > out.txt");
 			out.close();
 			Runtime r = Runtime.getRuntime();

codejudge-compiler/src/codejudge/compiler/languages/Python.java

@@ -32,6 +32,7 @@ public void compile() {
 			// create the execution script
 			out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(dir + "/run.sh")));
 			out.write("cd \"" + dir +"\"\n");
+			out.write("chroot .\n");
 			out.write("python " + file + "< in.txt > out.txt 2>err.txt");
 			out.close();
 			Runtime r = Runtime.getRuntime();