--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/org/tmatesoft/hg/internal/FileSystemHelper.java	Fri Apr 19 20:30:34 2013 +0200
@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 2013 TMate Software Ltd
+ *  
+ * 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; version 2 of the License.
+ *
+ * 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.
+ *
+ * For information on how to redistribute this software under
+ * the terms of a license other than GNU General Public License
+ * contact TMate Software at support@hg4j.com
+ */
+package org.tmatesoft.hg.internal;
+
+import static org.tmatesoft.hg.util.LogFacility.Severity.Warn;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+import org.tmatesoft.hg.core.SessionContext;
+
+/**
+ * TODO Merge with RegularFileStats
+ * 
+ * @author Artem Tikhomirov
+ * @author TMate Software Ltd.
+ */
+public class FileSystemHelper {
+	
+	private final SessionContext ctx;
+	private final List<String> linkCmd, chmodCmd, statCmd;
+	private final ProcessExecHelper execHelper;
+
+	public FileSystemHelper(SessionContext sessionContext) {
+		ctx = sessionContext;
+		if (Internals.runningOnWindows()) {
+			linkCmd = Arrays.asList("mklink", "%1", "%2");
+			chmodCmd = Collections.emptyList();
+			statCmd = Collections.emptyList();
+		} else {
+			linkCmd = Arrays.asList("/bin/ln", "-s", "%2", "%1");
+			chmodCmd = Arrays.asList("/bin/chmod", "+x", "%1");
+			statCmd = Arrays.asList("stat", "--format=%a", "%1");
+		}
+		execHelper = new ProcessExecHelper();
+	}
+
+	public void createSymlink(File parentDir, String linkName, byte[] target) throws IOException {
+		ArrayList<String> command = new ArrayList<String>(linkCmd);
+		command.set(command.indexOf("%1"), linkName);
+		String targetFilename = Internals.getFileEncoding(ctx).decode(ByteBuffer.wrap(target)).toString();
+		command.set(command.indexOf("%2"), targetFilename);
+		execHelper.cwd(parentDir);
+		try {
+			execHelper.exec(command);
+		} catch (InterruptedException ex) {
+			throw new IOException(ex);
+		}
+	}
+	
+	public void setExecutableBit(File parentDir, String fname) throws IOException {
+		if (chmodCmd.isEmpty()) {
+			return;
+		}
+		ArrayList<String> command = new ArrayList<String>(chmodCmd);
+		command.set(command.indexOf("%1"), fname);
+		execHelper.cwd(parentDir);
+		try {
+			execHelper.exec(command);
+		} catch (InterruptedException ex) {
+			throw new IOException(ex);
+		}
+	}
+
+	public int getFileMode(File file, int defaultValue) throws IOException {
+		if (statCmd.isEmpty()) {
+			return defaultValue;
+		}
+		ArrayList<String> command = new ArrayList<String>(statCmd);
+		command.set(command.indexOf("%1"), file.getAbsolutePath());
+		String result = null;
+		try {
+			result = execHelper.exec(command).toString().trim();
+			if (result.isEmpty()) {
+				return defaultValue;
+			}
+			return Integer.parseInt(result, 8);
+		} catch (InterruptedException ex) {
+			throw new IOException(ex);
+		} catch (NumberFormatException ex) {
+			ctx.getLog().dump(getClass(), Warn, ex, String.format("Bad value for access rights:%s", result));
+			return defaultValue;
+		}
+	}
+}