--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/solaris/classes/sun/nio/fs/UnixUserPrincipals.java	Sun Feb 15 12:25:54 2009 +0000
@@ -0,0 +1,175 @@
+/*
+ * Copyright 2008-2009 Sun Microsystems, Inc.  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.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package sun.nio.fs;
+
+import java.nio.file.attribute.*;
+import java.io.IOException;
+import static sun.nio.fs.UnixNativeDispatcher.*;
+
+/**
+ * Unix implementation of java.nio.file.attribute.UserPrincipal
+ */
+
+class UnixUserPrincipals {
+    private static User createSpecial(String name) { return new User(-1, name); }
+
+    static final User SPECIAL_OWNER = createSpecial("OWNER@");
+    static final User SPECIAL_GROUP = createSpecial("GROUP@");
+    static final User SPECIAL_EVERYONE = createSpecial("EVERYONE@");
+
+    static class User implements UserPrincipal {
+        private final int id;             // uid or gid
+        private final boolean isGroup;
+        private final String name;
+
+        private User(int id, boolean isGroup, String name) {
+            this.id = id;
+            this.isGroup = isGroup;
+            this.name = name;
+        }
+
+        User(int id, String name) {
+            this(id, false, name);
+        }
+
+        int uid() {
+            if (isGroup)
+                throw new AssertionError();
+            return id;
+        }
+
+        int gid() {
+            if (isGroup)
+                return id;
+            throw new AssertionError();
+        }
+
+        boolean isSpecial() {
+            return id == -1;
+        }
+
+        @Override
+        public String getName() {
+            return name;
+        }
+
+        @Override
+        public String toString() {
+            return name;
+        }
+
+        @Override
+        public boolean equals(Object obj) {
+            if (obj == this)
+                return true;
+            if (!(obj instanceof User))
+                return false;
+            User other = (User)obj;
+            if ((this.id != other.id) ||
+                (this.isGroup != other.isGroup)) {
+                return false;
+            }
+            // specials
+            if (this.id == -1 && other.id == -1)
+                return this.name.equals(other.name);
+
+            return true;
+        }
+
+        @Override
+        public int hashCode() {
+            return (id != -1) ? id : name.hashCode();
+        }
+    }
+
+    static class Group extends User implements GroupPrincipal {
+        Group(int id, String name) {
+            super(id, true, name);
+        }
+    }
+
+    // return UserPrincipal representing given uid
+    static User fromUid(int uid) {
+        String name = null;
+        try {
+            name = new String(getpwuid(uid));
+        } catch (UnixException x) {
+            name = Integer.toString(uid);
+        }
+        return new User(uid, name);
+    }
+
+    // return GroupPrincipal representing given gid
+    static Group fromGid(int gid) {
+        String name = null;
+        try {
+            name = new String(getgrgid(gid));
+        } catch (UnixException x) {
+            name = Integer.toString(gid);
+        }
+        return new Group(gid, name);
+    }
+
+    // lookup user or group name
+    private static int lookupName(String name, boolean isGroup)
+        throws IOException
+    {
+        SecurityManager sm = System.getSecurityManager();
+        if (sm != null) {
+            sm.checkPermission(new RuntimePermission("lookupUserInformation"));
+        }
+        int id = -1;
+        try {
+            id = (isGroup) ? getgrnam(name) : getpwnam(name);
+        } catch (UnixException x) {
+            throw new IOException(name + ": " + x.errorString());
+        }
+        if (id == -1)
+            throw new UserPrincipalNotFoundException(name);
+        return id;
+
+    }
+
+    // lookup user name
+    static UserPrincipal lookupUser(String name) throws IOException {
+        if (name.equals(SPECIAL_OWNER.getName()))
+            return SPECIAL_OWNER;
+        if (name.equals(SPECIAL_GROUP.getName()))
+            return SPECIAL_GROUP;
+        if (name.equals(SPECIAL_EVERYONE.getName()))
+            return SPECIAL_EVERYONE;
+        int uid = lookupName(name, false);
+        return new User(uid, name);
+    }
+
+    // lookup group name
+    static GroupPrincipal lookupGroup(String group)
+        throws IOException
+    {
+        int gid = lookupName(group, true);
+        return new Group(gid, group);
+    }
+}