1 files changed, 83 insertions, 0 deletions
diff --git a/src/main/java/org/openslx/taskmanager/tasks/Symlink.java b/src/main/java/org/openslx/taskmanager/tasks/Symlink.java
new file mode 100644
index 0000000..7a6a3bd
--- /dev/null
+++ b/src/main/java/org/openslx/taskmanager/tasks/Symlink.java
@@ -0,0 +1,83 @@
+package org.openslx.taskmanager.tasks;
+
+import java.io.File;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+
+import org.apache.commons.io.FileUtils;
+import org.apache.commons.io.FilenameUtils;
+import org.openslx.satserver.util.Util;
+import org.openslx.taskmanager.api.AbstractTask;
+
+import com.google.gson.annotations.Expose;
+
+public class Symlink extends AbstractTask
+{
+
+	protected static final String[] ALLOWED_DIRS =
+	{ "/srv/openslx/www/boot/" };
+
+	@Expose
+	private String target = null;
+	@Expose
+	private String linkname = null;
+
+	private Output status = new Output();
+
+	@Override
+	protected boolean initTask()
+	{
+		if ( Util.isEmpty( this.linkname ) ) {
+			status.error = "Link name empty";
+			return false;
+		}
+		if ( this.linkname.endsWith( "/" ) ) {
+			status.error = "Link name ends with slash";
+			return false;
+		}
+		this.setStatusObject( status );
+		if ( Util.isEmpty( this.target ) ) {
+			status.error = "Target empty";
+			return false;
+		}
+		this.linkname = FilenameUtils.normalize( this.linkname );
+		if ( !Util.startsWith( this.linkname, ALLOWED_DIRS ) ) {
+			status.error = "Link name not in allowed directory";
+			return false;
+		}
+		if ( !this.target.startsWith( "/" ) ) {
+			this.target = new File( this.linkname ).getParent() + "/" + this.target;
+		}
+		this.target = FilenameUtils.normalize( this.target );
+		if ( !Util.startsWith( this.target, ALLOWED_DIRS ) ) {
+			status.error = "Target not in allowed directory";
+			return false;
+		}
+		return true;
+	}
+
+	@Override
+	protected boolean execute()
+	{
+		FileUtils.deleteQuietly( new File( linkname ) );
+		if ( this.target != null ) {
+   		try {
+   			Files.createSymbolicLink( Paths.get( this.linkname ), Paths.get( this.target ) );
+   		} catch ( Exception e ) {
+   			status.error = e.toString();
+   			return false;
+   		}
+		}
+		return true;
+	}
+
+	/**
+	 * Output - contains additional status data of this task
+	 */
+	@SuppressWarnings( "unused" )
+	private static class Output
+	{
+		protected String error = null;
+	}
+
+}