| /* |
| * Copyright (c) 2008, 2013, 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.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 = Util.toString(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 = Util.toString(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) { |
| // lookup failed, allow input to be uid or gid |
| try { |
| id = Integer.parseInt(name); |
| } catch (NumberFormatException ignore) { |
| 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); |
| } |
| } |