| /* |
| * Copyright (c) 2008, 2015, 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.*; |
| import java.nio.ByteBuffer; |
| import java.nio.channels.FileChannel; |
| import java.io.IOException; |
| import java.util.*; |
| |
| import static sun.nio.fs.UnixNativeDispatcher.*; |
| import static sun.nio.fs.UnixConstants.*; |
| import static sun.nio.fs.SolarisConstants.*; |
| |
| /** |
| * Solaris emulation of NamedAttributeView using extended attributes. |
| */ |
| |
| class SolarisUserDefinedFileAttributeView |
| extends AbstractUserDefinedFileAttributeView |
| { |
| private static final byte[] HERE = { '.' }; |
| |
| private byte[] nameAsBytes(UnixPath file, String name) throws IOException { |
| byte[] bytes = Util.toBytes(name); |
| // "", "." and ".." not allowed |
| if (bytes.length == 0 || bytes[0] == '.') { |
| if (bytes.length <= 1 || |
| (bytes.length == 2 && bytes[1] == '.')) |
| { |
| throw new FileSystemException(file.getPathForExceptionMessage(), |
| null, "'" + name + "' is not a valid name"); |
| } |
| } |
| return bytes; |
| } |
| |
| private final UnixPath file; |
| private final boolean followLinks; |
| |
| SolarisUserDefinedFileAttributeView(UnixPath file, boolean followLinks) { |
| this.file = file; |
| this.followLinks = followLinks; |
| } |
| |
| @Override |
| public List<String> list() throws IOException { |
| if (System.getSecurityManager() != null) |
| checkAccess(file.getPathForPermissionCheck(), true, false); |
| |
| int fd = -1; |
| try { |
| try { |
| fd = file.openForAttributeAccess(followLinks); |
| |
| // open extended attribute directory |
| int dfd = openat(fd, HERE, (O_RDONLY|O_XATTR), 0); |
| long dp; |
| try { |
| dp = fdopendir(dfd); |
| } catch (UnixException x) { |
| close(dfd); |
| throw x; |
| } |
| |
| // read list of extended attributes |
| List<String> list = new ArrayList<>(); |
| try { |
| byte[] name; |
| while ((name = readdir(dp)) != null) { |
| String s = Util.toString(name); |
| if (!s.equals(".") && !s.equals("..")) |
| list.add(s); |
| } |
| } finally { |
| closedir(dp); |
| } |
| return Collections.unmodifiableList(list); |
| } catch (UnixException x) { |
| throw new FileSystemException(file.getPathForExceptionMessage(), |
| null, "Unable to get list of extended attributes: " + |
| x.getMessage()); |
| } |
| } finally { |
| close(fd); |
| } |
| } |
| |
| @Override |
| public int size(String name) throws IOException { |
| if (System.getSecurityManager() != null) |
| checkAccess(file.getPathForPermissionCheck(), true, false); |
| |
| int fd = -1; |
| try { |
| try { |
| fd = file.openForAttributeAccess(followLinks); |
| |
| // open attribute file |
| int afd = openat(fd, nameAsBytes(file,name), (O_RDONLY|O_XATTR), 0); |
| try { |
| // read attribute's attributes |
| UnixFileAttributes attrs = UnixFileAttributes.get(afd); |
| long size = attrs.size(); |
| if (size > Integer.MAX_VALUE) |
| throw new ArithmeticException("Extended attribute value too large"); |
| return (int)size; |
| } finally { |
| close(afd); |
| } |
| } catch (UnixException x) { |
| throw new FileSystemException(file.getPathForExceptionMessage(), |
| null, "Unable to get size of extended attribute '" + name + |
| "': " + x.getMessage()); |
| } |
| } finally { |
| close(fd); |
| } |
| } |
| |
| @Override |
| public int read(String name, ByteBuffer dst) throws IOException { |
| if (System.getSecurityManager() != null) |
| checkAccess(file.getPathForPermissionCheck(), true, false); |
| |
| int fd = -1; |
| try { |
| try { |
| fd = file.openForAttributeAccess(followLinks); |
| |
| // open attribute file |
| int afd = openat(fd, nameAsBytes(file,name), (O_RDONLY|O_XATTR), 0); |
| |
| // wrap with channel |
| FileChannel fc = UnixChannelFactory.newFileChannel(afd, file.toString(), true, false); |
| |
| // read to EOF (nothing we can do if I/O error occurs) |
| try { |
| if (fc.size() > dst.remaining()) |
| throw new IOException("Extended attribute file too large"); |
| int total = 0; |
| while (dst.hasRemaining()) { |
| int n = fc.read(dst); |
| if (n < 0) |
| break; |
| total += n; |
| } |
| return total; |
| } finally { |
| fc.close(); |
| } |
| } catch (UnixException x) { |
| throw new FileSystemException(file.getPathForExceptionMessage(), |
| null, "Unable to read extended attribute '" + name + |
| "': " + x.getMessage()); |
| } |
| } finally { |
| close(fd); |
| } |
| } |
| |
| @Override |
| public int write(String name, ByteBuffer src) throws IOException { |
| if (System.getSecurityManager() != null) |
| checkAccess(file.getPathForPermissionCheck(), false, true); |
| |
| int fd = -1; |
| try { |
| try { |
| fd = file.openForAttributeAccess(followLinks); |
| |
| // open/create attribute file |
| int afd = openat(fd, nameAsBytes(file,name), |
| (O_CREAT|O_WRONLY|O_TRUNC|O_XATTR), |
| UnixFileModeAttribute.ALL_PERMISSIONS); |
| |
| // wrap with channel |
| FileChannel fc = UnixChannelFactory.newFileChannel(afd, file.toString(), false, true); |
| |
| // write value (nothing we can do if I/O error occurs) |
| try { |
| int rem = src.remaining(); |
| while (src.hasRemaining()) { |
| fc.write(src); |
| } |
| return rem; |
| } finally { |
| fc.close(); |
| } |
| } catch (UnixException x) { |
| throw new FileSystemException(file.getPathForExceptionMessage(), |
| null, "Unable to write extended attribute '" + name + |
| "': " + x.getMessage()); |
| } |
| } finally { |
| close(fd); |
| } |
| } |
| |
| @Override |
| public void delete(String name) throws IOException { |
| if (System.getSecurityManager() != null) |
| checkAccess(file.getPathForPermissionCheck(), false, true); |
| |
| int fd = -1; |
| try { |
| fd = file.openForAttributeAccess(followLinks); |
| |
| int dfd = openat(fd, HERE, (O_RDONLY|O_XATTR), 0); |
| try { |
| unlinkat(dfd, nameAsBytes(file,name), 0); |
| } finally { |
| close(dfd); |
| } |
| } catch (UnixException x) { |
| throw new FileSystemException(file.getPathForExceptionMessage(), |
| null, "Unable to delete extended attribute '" + name + |
| "': " + x.getMessage()); |
| } finally { |
| close(fd); |
| } |
| } |
| |
| /** |
| * Used by copyTo/moveTo to copy extended attributes from source to target. |
| * |
| * @param ofd |
| * file descriptor for source file |
| * @param nfd |
| * file descriptor for target file |
| */ |
| static void copyExtendedAttributes(int ofd, int nfd) { |
| try { |
| // open extended attribute directory |
| int dfd = openat(ofd, HERE, (O_RDONLY|O_XATTR), 0); |
| long dp = 0L; |
| try { |
| dp = fdopendir(dfd); |
| } catch (UnixException x) { |
| close(dfd); |
| throw x; |
| } |
| |
| // copy each extended attribute |
| try { |
| byte[] name; |
| while ((name = readdir(dp)) != null) { |
| // ignore "." and ".." |
| if (name[0] == '.') { |
| if (name.length == 1) |
| continue; |
| if (name.length == 2 && name[1] == '.') |
| continue; |
| } |
| copyExtendedAttribute(ofd, name, nfd); |
| } |
| } finally { |
| closedir(dp); |
| } |
| } catch (UnixException ignore) { |
| } |
| } |
| |
| private static void copyExtendedAttribute(int ofd, byte[] name, int nfd) |
| throws UnixException |
| { |
| // open source attribute file |
| int src = openat(ofd, name, (O_RDONLY|O_XATTR), 0); |
| try { |
| // create target attribute file |
| int dst = openat(nfd, name, (O_CREAT|O_WRONLY|O_TRUNC|O_XATTR), |
| UnixFileModeAttribute.ALL_PERMISSIONS); |
| try { |
| UnixCopyFile.transfer(dst, src, 0L); |
| } finally { |
| close(dst); |
| } |
| } finally { |
| close(src); |
| } |
| } |
| } |