jdk/test/java/io/File/MaxPath.java
author sherman
Wed, 25 Jun 2008 13:58:22 -0700
changeset 785 36c29b2692f1
child 5506 202f599c92aa
permissions -rw-r--r--
6481955: Uncanonicalized absolute filepath with length 248-260 no longer works (win) Summary: Uncanonicalized absolute filepath with length 248-260 no longer works (win) Reviewed-by: alanb
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/*
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 * Copyright 2008 Sun Microsystems, Inc.  All Rights Reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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 * CA 95054 USA or visit www.sun.com if you need additional information or
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 * have any questions.
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 */
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/* @test
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   @bug 6481955
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   @summary Path length less than MAX_PATH (260) works on Windows
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 */
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import java.io.*;
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public class MaxPath {
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    public static void main(String[] args) throws Exception {
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        String osName = System.getProperty("os.name");
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        if (!osName.startsWith("Windows")) {
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            return;
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        }
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        int MAX_PATH = 260;
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        String dir = new File(".").getAbsolutePath() + "\\";
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        String padding = "1234567890123456789012345678901234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890";
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        for (int i = 240 - dir.length(); i < MAX_PATH - dir.length(); i++) {
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            String longname = dir + padding.substring(0, i);
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            try {
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                File f = new File(longname);
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                if (f.createNewFile()) {
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                    if (!f.exists() || !f.canRead()) {
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                        throw new RuntimeException("Failed at length: " + longname.length());
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                    }
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                    f.delete();
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                }
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            } catch (IOException e) {
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                System.out.println("Failed at length: " + longname.length());
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                throw e;
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            }
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        }
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    }
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}