/* * Copyright (c) 1998, 2017, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code 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 * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions.
*/
/* @summary Common definitions for general exhaustive pathname tests @author Mark Reinhold
*/
/* Generate a filename unique to this run */ privatestatic String gensym() { return"x." + ++gensymCounter;
}
/** * Create files and folders in the test working directory. * The purpose is to make sure the test will not go out of * its user dir when walking the file tree. * * @param depth The number of directory levels to be created under * the user directory. It should be the maximum value * of the depths passed to checkNames method (including * direct or indirect calling) in a whole test.
*/ protectedstaticvoid initTestData(int depth) throws IOException {
File parent = new File(userDir + File.separator + workSubDir); if (!parent.mkdir()) { thrownew IOException("Fail to create directory: " + parent);
} for (int i = 0; i < depth; i++) {
File tmp = new File(parent, gensym());
tmp.createNewFile();
tmp = new File(parent, gensym()); if (tmp.mkdir())
parent = tmp; else thrownew IOException("Fail to create directory, " + tmp);
}
baseDir = parent.getAbsolutePath();
relative = baseDir.substring(userDir.length() + 1);
}
/** * Find a file in the given subdirectory, or descend into further * subdirectories, if any, if no file is found here. Return null if no * file can be found anywhere beneath the given subdirectory. * @param dir Directory at which we started * @param subdir Subdirectory that we're exploring * @param dl Listing of subdirectory
*/ privatestatic String findSomeFile(String dir, String subdir, String[] dl) { for (int i = 0; i < dl.length; i++) {
File f = new File(subdir, dl[i]);
File df = new File(dir, f.getPath()); if (Files.isRegularFile(df.toPath(), LinkOption.NOFOLLOW_LINKS)) { return f.getPath();
}
} for (int i = 0; i < dl.length; i++) {
File f = (subdir.length() == 0) ? new File(dl[i])
: new File(subdir, dl[i]);
File df = new File(dir, f.getPath()); if (Files.isDirectory(df.toPath(), LinkOption.NOFOLLOW_LINKS)) {
String[] dl2 = df.list(); if (dl2 != null) {
String ff = findSomeFile(dir, f.getPath(), dl2); if (ff != null) return ff;
}
}
} returnnull;
}
/** * Construct a string that names a file in the given directory. If create * is true, then create a file if none is found, and throw an exception if * that is not possible; otherwise, return null if no file can be found.
*/ privatestatic String findSomeFile(String dir, boolean create) {
File d = new File(dir);
String[] dl = d.list(); if (dl == null) { thrownew RuntimeException("Can't list " + dir);
} for (int i = 0; i < dl.length; i++) {
File f = new File(dir, dl[i]); if (Files.isRegularFile(f.toPath(), LinkOption.NOFOLLOW_LINKS)) { return dl[i];
}
}
String f = findSomeFile(dir, "", dl); if (f != null) { return f;
} if (create) {
File nf = new File(d, gensym());
OutputStream os; try {
os = new FileOutputStream(nf);
os.close();
} catch (IOException x) { thrownew RuntimeException("Can't create a file in " + dir);
} return nf.getName();
} returnnull;
}
/** * Construct a string that names a subdirectory of the given directory. * If create is true, then create a subdirectory if none is found, and * throw an exception if that is not possible; otherwise, return null if * no subdirectory can be found.
*/ privatestatic String findSomeDir(String dir, boolean create) {
File d = new File(dir);
String[] dl = d.list(); if (dl == null) { thrownew RuntimeException("Can't list " + dir);
} for (int i = 0; i < dl.length; i++) {
File f = new File(d, dl[i]); if (Files.isDirectory(f.toPath(), LinkOption.NOFOLLOW_LINKS)) {
String[] dl2 = f.list(); if (dl2 == null || dl2.length >= 250) { /* Heuristic to avoid scanning huge directories */ continue;
} return dl[i];
}
} if (create) {
File sd = new File(d, gensym()); if (sd.mkdir()) return sd.getName();
} returnnull;
}
/** Construct a string that does not name a file in the given directory */ privatestatic String findNon(String dir) {
File d = new File(dir);
String[] x = new String[] { "foo", "bar", "baz" }; for (int i = 0; i < x.length; i++) {
File f = new File(d, x[i]); if (!f.exists()) { return x[i];
}
} for (int i = 0; i < 1024; i++) {
String n = "xx" + Integer.toString(i);
File f = new File(d, n); if (!f.exists()) { return n;
}
} thrownew RuntimeException("Can't find a non-existent file in " + dir);
}
/** Ensure that the named file does not exist */ publicstaticvoid ensureNon(String fn) { if ((new File(fn)).exists()) { thrownew RuntimeException("Test path " + fn + " exists");
}
}
/** Tell whether the given character is a "slash" on this platform */ privatestaticboolean isSlash(char x) { if (x == File.separatorChar) returntrue; if (win32 && (x == '/')) returntrue; returnfalse;
}
/** * Trim trailing slashes from the given string, but leave singleton slashes * alone (they denote root directories)
*/ privatestatic String trimTrailingSlashes(String s) { int n = s.length(); if (n == 0) return s;
n--; while ((n > 0) && isSlash(s.charAt(n))) { if ((n >= 1) && s.charAt(n - 1) == ':') break;
n--;
} return s.substring(0, n + 1);
}
/** Concatenate two paths, trimming slashes as needed */ privatestatic String pathConcat(String a, String b) { if (a.length() == 0) return b; if (b.length() == 0) return a; if (isSlash(a.charAt(a.length() - 1))
|| isSlash(b.charAt(0))
|| (win32 && (a.charAt(a.length() - 1) == ':'))) { return a + b;
} else { return a + File.separatorChar + b;
}
}
/** Hash table of input pathnames, used to detect duplicates */ privatestatic Hashtable<String, String> checked = new Hashtable<>();
/** * Check the given pathname. Its canonical pathname should be the given * answer. If the path names a file that exists and is readable, then * FileInputStream and RandomAccessFile should both be able to open it.
*/ publicstaticvoid check(String answer, String path) throws IOException {
String ans = trimTrailingSlashes(answer); if (path.length() == 0) return; if (checked.get(path) != null) {
System.err.println("DUP " + path); return;
}
checked.put(path, path);
String cpath; try {
File f = new File(path);
cpath = f.getCanonicalPath(); if (f.exists() && f.isFile() && f.canRead()) {
InputStream in = new FileInputStream(path);
in.close();
RandomAccessFile raf = new RandomAccessFile(path, "r");
raf.close();
}
} catch (IOException x) {
System.err.println(ans + " <-- " + path + " ==> " + x); if (debug) return; elsethrow x;
} if (cpath.equals(ans)) {
System.err.println(ans + " <== " + path);
} else {
System.err.println(ans + " <-- " + path + " ==> " + cpath + " MISMATCH"); if (!debug) { thrownew RuntimeException("Mismatch: " + path + " ==> " + cpath + ", should be " + ans);
}
}
}
/* * The following three mutually-recursive methods generate and check a tree * of filenames of arbitrary depth. Each method has (at least) these * arguments: * * int depth Remaining tree depth * boolean create Controls whether test files and directories * will be created as needed * String ans Expected answer for the check method (above) * String ask Input pathname to be passed to the check method
*/
/** Check a single slash case, plus its children */ privatestaticvoid checkSlash(int depth, boolean create,
String ans, String ask, String slash) throws Exception
{
check(ans, ask + slash);
checkNames(depth, create,
ans.endsWith(File.separator) ? ans : ans + File.separator,
ask + slash);
}
/** Check slash cases for the given ask string */ publicstaticvoid checkSlashes(int depth, boolean create,
String ans, String ask) throws Exception
{
check(ans, ask); if (depth == 0) return;
checkSlash(depth, create, ans, ask, "/");
checkSlash(depth, create, ans, ask, "//");
checkSlash(depth, create, ans, ask, "///"); if (win32) {
checkSlash(depth, create, ans, ask, "\\");
checkSlash(depth, create, ans, ask, "\\\\");
checkSlash(depth, create, ans, ask, "\\/");
checkSlash(depth, create, ans, ask, "/\\");
checkSlash(depth, create, ans, ask, "\\\\\\");
}
}
/** Check name cases for the given ask string */ publicstaticvoid checkNames(int depth, boolean create,
String ans, String ask) throws Exception
{ int d = depth - 1;
File f = new File(ans);
String n;
/* Normal name */ if (f.exists()) { if (Files.isDirectory(f.toPath(), LinkOption.NOFOLLOW_LINKS) && f.list() != null) { if ((n = findSomeFile(ans, create)) != null)
checkSlashes(d, create, ans + n, ask + n); if ((n = findSomeDir(ans, create)) != null)
checkSlashes(d, create, ans + n, ask + n);
}
n = findNon(ans);
checkSlashes(d, create, ans + n, ask + n);
} else {
n = "foo" + depth;
checkSlashes(d, create, ans + n, ask + n);
}
/* ".." */ if ((n = f.getParent()) != null) {
String n2; if (win32
&& ((n2 = f.getParentFile().getParent()) != null)
&& n2.equals("\\\\")) { /* Win32 resolves \\foo\bar\.. to \\foo\bar */
checkSlashes(d, create, ans, ask + "..");
} else {
checkSlashes(d, create, n, ask + "..");
}
} else { if (win32)
checkSlashes(d, create, ans, ask + ".."); else { // Fix for 4237875. We must ensure that we are sufficiently // deep in the path hierarchy to test parents this high up
File thisPath = new File(ask);
File nextPath = new File(ask + ".."); if (!thisPath.getCanonicalPath().equals(nextPath.getCanonicalPath()))
checkSlashes(d, create, ans + "..", ask + "..");
}
}
}
}
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