DirTree - directory lister, like UNIX ls or DOS and VMS dir
/*
* Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
* All rights reserved. Software written by Ian F. Darwin and others.
* $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
* cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
* pioneering role in inventing and promulgating (and standardizing) the Java
* language and environment is gratefully acknowledged.
*
* The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
* inventing predecessor languages C and C++ is also gratefully acknowledged.
*/
import java.io.File;
/**
* DirTree - directory lister, like UNIX ls or DOS and VMS dir
*
* @author Ian Darwin, http://www.darwinsys.com/
* @version $Id: DirTree.java,v 1.4 2004/02/09 03:33:47 ian Exp $
*/
public class DirTree {
/** Main program */
public static void main(String[] argv) {
DirTree dt = new DirTree();
if (argv.length == 0)
dt.doDir(".");
else
for (int i = 0; i < argv.length; i++)
dt.doDir(argv[i]);
}
/** doDir - handle one filesystem object by name */
private void doDir(String s) {
File f = new File(s);
if (!f.exists()) {
System.out.println(s + " does not exist");
return;
}
if (f.isFile())
doFile(f);
else if (f.isDirectory()) {
System.out.println("d " + f.getPath());
String objects[] = f.list();
for (int i = 0; i < objects.length; i++)
doDir(s + f.separator + objects[i]);
} else
System.err.println("Unknown: " + s);
}
/** doFile - process one regular file. */
private static void doFile(File f) {
System.out.println("f " + f.getPath());
}
}
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