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use current tar library for untar files

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- remove old source copy
pull/23/head
reger 9 years ago
parent 5d71fc70e3
commit 681889ae64
7 changed files with 10 additions and 2241 deletions
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19
source/net/yacy/utils/tarTools.java
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@ -35,8 +35,9 @@ import java.util.zip.GZIPInputStream;
import net.yacy.cora.util.ConcurrentLog;
import org.apache.tools.tar.TarEntry;
import org.apache.tools.tar.TarInputStream;
import org.apache.commons.compress.archivers.tar.TarArchiveEntry;
import org.apache.commons.compress.archivers.tar.TarArchiveInputStream;
import org.apache.commons.io.IOUtils;
public class tarTools {
@ -69,19 +70,19 @@ public class tarTools {
public static void unTar(final InputStream in, final String untarDir) throws Exception{
ConcurrentLog.info("UNTAR", "starting");
if(new File(untarDir).exists()){
final TarInputStream tin = new TarInputStream(in);
TarEntry tarEntry = tin.getNextEntry();
final TarArchiveInputStream tin = new TarArchiveInputStream(in);
TarArchiveEntry tarEntry = tin.getNextTarEntry();
while(tarEntry != null){
final File destPath = new File(untarDir + File.separator + tarEntry.getName());
if (!tarEntry.isDirectory()) {
new File(destPath.getParent()).mkdirs(); // create missing subdirectories
final FileOutputStream fout = new FileOutputStream(destPath);
tin.copyEntryContents(fout);
IOUtils.copyLarge(tin,fout,0,tarEntry.getSize());
fout.close();
} else {
destPath.mkdir();
}
tarEntry = tin.getNextEntry();
tarEntry = tin.getNextTarEntry();
}
tin.close();
} else { // untarDir doesn't exist
@ -89,8 +90,8 @@ public class tarTools {
}
ConcurrentLog.info("UNTAR", "finished");
}
public static void main(final String args[]) {
public static void main(final String args[]) {
// @arg0 source
// @arg1 destination
if(args.length == 2){
@ -103,4 +104,4 @@ public class tarTools {
System.out.println("usage: <source> <destination>");
}
}
}
}

461
source/org/apache/tools/tar/TarBuffer.java
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@ -1,461 +0,0 @@
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
/*
* This package is based on the work done by Timothy Gerard Endres
* (time@ice.com) to whom the Ant project is very grateful for his great code.
*/
package org.apache.tools.tar;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.IOException;
import java.util.Arrays;
/**
* The TarBuffer class implements the tar archive concept
* of a buffered input stream. This concept goes back to the
* days of blocked tape drives and special io devices. In the
* Java universe, the only real function that this class
* performs is to ensure that files have the correct "block"
* size, or other tars will complain.
* <p>
* You should never have a need to access this class directly.
* TarBuffers are created by Tar IO Streams.
*
*/
public class TarBuffer {
/** Default record size */
public static final int DEFAULT_RCDSIZE = (512);
/** Default block size */
public static final int DEFAULT_BLKSIZE = (DEFAULT_RCDSIZE * 20);
private InputStream inStream;
private OutputStream outStream;
private byte[] blockBuffer;
private int currBlkIdx;
private int currRecIdx;
private int blockSize;
private int recordSize;
private int recsPerBlock;
private boolean debug;
/**
* Constructor for a TarBuffer on an input stream.
* @param inStream the input stream to use
*/
public TarBuffer(InputStream inStream) {
this(inStream, TarBuffer.DEFAULT_BLKSIZE);
}
/**
* Constructor for a TarBuffer on an input stream.
* @param inStream the input stream to use
* @param blockSize the block size to use
*/
public TarBuffer(InputStream inStream, int blockSize) {
this(inStream, blockSize, TarBuffer.DEFAULT_RCDSIZE);
}
/**
* Constructor for a TarBuffer on an input stream.
* @param inStream the input stream to use
* @param blockSize the block size to use
* @param recordSize the record size to use
*/
public TarBuffer(InputStream inStream, int blockSize, int recordSize) {
this.inStream = inStream;
this.outStream = null;
this.initialize(blockSize, recordSize);
}
/**
* Constructor for a TarBuffer on an output stream.
* @param outStream the output stream to use
*/
public TarBuffer(OutputStream outStream) {
this(outStream, TarBuffer.DEFAULT_BLKSIZE);
}
/**
* Constructor for a TarBuffer on an output stream.
* @param outStream the output stream to use
* @param blockSize the block size to use
*/
public TarBuffer(OutputStream outStream, int blockSize) {
this(outStream, blockSize, TarBuffer.DEFAULT_RCDSIZE);
}
/**
* Constructor for a TarBuffer on an output stream.
* @param outStream the output stream to use
* @param blockSize the block size to use
* @param recordSize the record size to use
*/
public TarBuffer(OutputStream outStream, int blockSize, int recordSize) {
this.inStream = null;
this.outStream = outStream;
this.initialize(blockSize, recordSize);
}
/**
* Initialization common to all constructors.
*/
private void initialize(int blockSize, int recordSize) {
this.debug = false;
this.blockSize = blockSize;
this.recordSize = recordSize;
this.recsPerBlock = (this.blockSize / this.recordSize);
this.blockBuffer = new byte[this.blockSize];
if (this.inStream != null) {
this.currBlkIdx = -1;
this.currRecIdx = this.recsPerBlock;
} else {
this.currBlkIdx = 0;
this.currRecIdx = 0;
}
}
/**
* Get the TAR Buffer's block size. Blocks consist of multiple records.
* @return the block size
*/
public int getBlockSize() {
return this.blockSize;
}
/**
* Get the TAR Buffer's record size.
* @return the record size
*/
public int getRecordSize() {
return this.recordSize;
}
/**
* Set the debugging flag for the buffer.
*
* @param debug If true, print debugging output.
*/
public void setDebug(boolean debug) {
this.debug = debug;
}
/**
* Determine if an archive record indicate End of Archive. End of
* archive is indicated by a record that consists entirely of null bytes.
*
* @param record The record data to check.
* @return true if the record data is an End of Archive
*/
public boolean isEOFRecord(byte[] record) {
for (int i = 0, sz = this.getRecordSize(); i < sz; ++i) {
if (record[i] != 0) {
return false;
}
}
return true;
}
/**
* Skip over a record on the input stream.
* @throws IOException on error
*/
public void skipRecord() throws IOException {
if (this.debug) {
System.err.println("SkipRecord: recIdx = " + this.currRecIdx
+ " blkIdx = " + this.currBlkIdx);
}
if (this.inStream == null) {
throw new IOException("reading (via skip) from an output buffer");
}
if (this.currRecIdx >= this.recsPerBlock) {
if (!this.readBlock()) {
return; // UNDONE
}
}
this.currRecIdx++;
}
/**
* Read a record from the input stream and return the data.
*
* @return The record data.
* @throws IOException on error
*/
public byte[] readRecord() throws IOException {
if (this.debug) {
System.err.println("ReadRecord: recIdx = " + this.currRecIdx
+ " blkIdx = " + this.currBlkIdx);
}
if (this.inStream == null) {
throw new IOException("reading from an output buffer");
}
if (this.currRecIdx >= this.recsPerBlock) {
if (!this.readBlock()) {
return null;
}
}
byte[] result = new byte[this.recordSize];
System.arraycopy(this.blockBuffer,
(this.currRecIdx * this.recordSize), result, 0,
this.recordSize);
this.currRecIdx++;
return result;
}
/**
* @return false if End-Of-File, else true
*/
private boolean readBlock() throws IOException {
if (this.debug) {
System.err.println("ReadBlock: blkIdx = " + this.currBlkIdx);
}
if (this.inStream == null) {
throw new IOException("reading from an output buffer");
}
this.currRecIdx = 0;
int offset = 0;
int bytesNeeded = this.blockSize;
while (bytesNeeded > 0) {
long numBytes = this.inStream.read(this.blockBuffer, offset,
bytesNeeded);
//
// NOTE
// We have fit EOF, and the block is not full!
//
// This is a broken archive. It does not follow the standard
// blocking algorithm. However, because we are generous, and
// it requires little effort, we will simply ignore the error
// and continue as if the entire block were read. This does
// not appear to break anything upstream. We used to return
// false in this case.
//
// Thanks to 'Yohann.Roussel@alcatel.fr' for this fix.
//
if (numBytes == -1) {
if (offset == 0) {
// Ensure that we do not read gigabytes of zeros
// for a corrupt tar file.
// See http://issues.apache.org/bugzilla/show_bug.cgi?id=39924
return false;
}
// However, just leaving the unread portion of the buffer dirty does
// cause problems in some cases. This problem is described in
// http://issues.apache.org/bugzilla/show_bug.cgi?id=29877
//
// The solution is to fill the unused portion of the buffer with zeros.
Arrays.fill(blockBuffer, offset, offset + bytesNeeded, (byte) 0);
break;
}
offset += numBytes;
bytesNeeded -= numBytes;
if (numBytes != this.blockSize) {
if (this.debug) {
System.err.println("ReadBlock: INCOMPLETE READ "
+ numBytes + " of " + this.blockSize
+ " bytes read.");
}
}
}
this.currBlkIdx++;
return true;
}
/**
* Get the current block number, zero based.
*
* @return The current zero based block number.
*/
public int getCurrentBlockNum() {
return this.currBlkIdx;
}
/**
* Get the current record number, within the current block, zero based.
* Thus, current offset = (currentBlockNum * recsPerBlk) + currentRecNum.
*
* @return The current zero based record number.
*/
public int getCurrentRecordNum() {
return this.currRecIdx - 1;
}
/**
* Write an archive record to the archive.
*
* @param record The record data to write to the archive.
* @throws IOException on error
*/
public void writeRecord(byte[] record) throws IOException {
if (this.debug) {
System.err.println("WriteRecord: recIdx = " + this.currRecIdx
+ " blkIdx = " + this.currBlkIdx);
}
if (this.outStream == null) {
throw new IOException("writing to an input buffer");
}
if (record.length != this.recordSize) {
throw new IOException("record to write has length '"
+ record.length
+ "' which is not the record size of '"
+ this.recordSize + "'");
}
if (this.currRecIdx >= this.recsPerBlock) {
this.writeBlock();
}
System.arraycopy(record, 0, this.blockBuffer,
(this.currRecIdx * this.recordSize),
this.recordSize);
this.currRecIdx++;
}
/**
* Write an archive record to the archive, where the record may be
* inside of a larger array buffer. The buffer must be "offset plus
* record size" long.
*
* @param buf The buffer containing the record data to write.
* @param offset The offset of the record data within buf.
* @throws IOException on error
*/
public void writeRecord(byte[] buf, int offset) throws IOException {
if (this.debug) {
System.err.println("WriteRecord: recIdx = " + this.currRecIdx
+ " blkIdx = " + this.currBlkIdx);
}
if (this.outStream == null) {
throw new IOException("writing to an input buffer");
}
if ((offset + this.recordSize) > buf.length) {
throw new IOException("record has length '" + buf.length
+ "' with offset '" + offset
+ "' which is less than the record size of '"
+ this.recordSize + "'");
}
if (this.currRecIdx >= this.recsPerBlock) {
this.writeBlock();
}
System.arraycopy(buf, offset, this.blockBuffer,
(this.currRecIdx * this.recordSize),
this.recordSize);
this.currRecIdx++;
}
/**
* Write a TarBuffer block to the archive.
*/
private void writeBlock() throws IOException {
if (this.debug) {
System.err.println("WriteBlock: blkIdx = " + this.currBlkIdx);
}
if (this.outStream == null) {
throw new IOException("writing to an input buffer");
}
this.outStream.write(this.blockBuffer, 0, this.blockSize);
this.outStream.flush();
this.currRecIdx = 0;
this.currBlkIdx++;
}
/**
* Flush the current data block if it has any data in it.
*/
private void flushBlock() throws IOException {
if (this.debug) {
System.err.println("TarBuffer.flushBlock() called.");
}
if (this.outStream == null) {
throw new IOException("writing to an input buffer");
}
if (this.currRecIdx > 0) {
this.writeBlock();
}
}
/**
* Close the TarBuffer. If this is an output buffer, also flush the
* current block before closing.
* @throws IOException on error
*/
public synchronized void close() throws IOException {
if (this.debug) {
System.err.println("TarBuffer.closeBuffer().");
}
if (this.outStream != null) {
this.flushBlock();
if (this.outStream != System.out
&& this.outStream != System.err) {
this.outStream.close();
this.outStream = null;
}
} else if (this.inStream != null) {
if (this.inStream != System.in) {
this.inStream.close();
this.inStream = null;
}
}
}
}

158
source/org/apache/tools/tar/TarConstants.java
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@ -1,158 +0,0 @@
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
/*
* This package is based on the work done by Timothy Gerard Endres
* (time@ice.com) to whom the Ant project is very grateful for his great code.
*/
package org.apache.tools.tar;
/**
* This interface contains all the definitions used in the package.
*
*/
// CheckStyle:InterfaceIsTypeCheck OFF (bc)
public interface TarConstants {
/**
* The length of the name field in a header buffer.
*/
int NAMELEN = 100;
/**
* The length of the mode field in a header buffer.
*/
int MODELEN = 8;
/**
* The length of the user id field in a header buffer.
*/
int UIDLEN = 8;
/**
* The length of the group id field in a header buffer.
*/
int GIDLEN = 8;
/**
* The length of the checksum field in a header buffer.
*/
int CHKSUMLEN = 8;
/**
* The length of the size field in a header buffer.
*/
int SIZELEN = 12;
/**
* The maximum size of a file in a tar archive (That's 11 sevens, octal).
*/
long MAXSIZE = 077777777777L;
/**
* The length of the magic field in a header buffer.
*/
int MAGICLEN = 8;
/**
* The length of the modification time field in a header buffer.
*/
int MODTIMELEN = 12;
/**
* The length of the user name field in a header buffer.
*/
int UNAMELEN = 32;
/**
* The length of the group name field in a header buffer.
*/
int GNAMELEN = 32;
/**
* The length of the devices field in a header buffer.
*/
int DEVLEN = 8;
/**
* LF_ constants represent the "link flag" of an entry, or more commonly,
* the "entry type". This is the "old way" of indicating a normal file.
*/
byte LF_OLDNORM = 0;
/**
* Normal file type.
*/
byte LF_NORMAL = (byte) '0';
/**
* Link file type.
*/
byte LF_LINK = (byte) '1';
/**
* Symbolic link file type.
*/
byte LF_SYMLINK = (byte) '2';
/**
* Character device file type.
*/
byte LF_CHR = (byte) '3';
/**
* Block device file type.
*/
byte LF_BLK = (byte) '4';
/**
* Directory file type.
*/
byte LF_DIR = (byte) '5';
/**
* FIFO (pipe) file type.
*/
byte LF_FIFO = (byte) '6';
/**
* Contiguous file type.
*/
byte LF_CONTIG = (byte) '7';
/**
* The magic tag representing a POSIX tar archive.
*/
String TMAGIC = "ustar";
/**
* The magic tag representing a GNU tar archive.
*/
String GNU_TMAGIC = "ustar ";
/**
* The namr of the GNU tar entry which contains a long name.
*/
String GNU_LONGLINK = "././@LongLink";
/**
* Identifies the *next* file on the tape as having a long name.
*/
byte LF_GNUTYPE_LONGNAME = (byte) 'L';
}

635
source/org/apache/tools/tar/TarEntry.java
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@ -1,635 +0,0 @@
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
/*
* This package is based on the work done by Timothy Gerard Endres
* (time@ice.com) to whom the Ant project is very grateful for his great code.
*/
/*
* Modifications (Michael Christen)
* - replaced StringBuffer with StringBuilder
*/
package org.apache.tools.tar;
import java.io.File;
import java.util.Date;
import java.util.Locale;
/**
* This class represents an entry in a Tar archive. It consists
* of the entry's header, as well as the entry's File. Entries
* can be instantiated in one of three ways, depending on how
* they are to be used.
* <p>
* TarEntries that are created from the header bytes read from
* an archive are instantiated with the TarEntry( byte[] )
* constructor. These entries will be used when extracting from
* or listing the contents of an archive. These entries have their
* header filled in using the header bytes. They also set the File
* to null, since they reference an archive entry not a file.
* <p>
* TarEntries that are created from Files that are to be written
* into an archive are instantiated with the TarEntry( File )
* constructor. These entries have their header filled in using
* the File's information. They also keep a reference to the File
* for convenience when writing entries.
* <p>
* Finally, TarEntries can be constructed from nothing but a name.
* This allows the programmer to construct the entry by hand, for
* instance when only an InputStream is available for writing to
* the archive, and the header information is constructed from
* other information. In this case the header fields are set to
* defaults and the File is set to null.
*
* <p>
* The C structure for a Tar Entry's header is:
* <pre>
* struct header {
* char name[NAMSIZ];
* char mode[8];
* char uid[8];
* char gid[8];
* char size[12];
* char mtime[12];
* char chksum[8];
* char linkflag;
* char linkname[NAMSIZ];
* char magic[8];
* char uname[TUNMLEN];
* char gname[TGNMLEN];
* char devmajor[8];
* char devminor[8];
* } header;
* </pre>
*
*/
public class TarEntry implements TarConstants {
/** The entry's name. */
private StringBuilder name;
/** The entry's permission mode. */
private int mode;
/** The entry's user id. */
private int userId;
/** The entry's group id. */
private int groupId;
/** The entry's size. */
private long size;
/** The entry's modification time. */
private long modTime;
/** The entry's link flag. */
private byte linkFlag;
/** The entry's link name. */
private StringBuilder linkName;
/** The entry's magic tag. */
private StringBuilder magic;
/** The entry's user name. */
private StringBuilder userName;
/** The entry's group name. */
private StringBuilder groupName;
/** The entry's major device number. */
private int devMajor;
/** The entry's minor device number. */
private int devMinor;
/** The entry's file reference */
private File file;
/** Maximum length of a user's name in the tar file */
public static final int MAX_NAMELEN = 31;
/** Default permissions bits for directories */
public static final int DEFAULT_DIR_MODE = 040755;
/** Default permissions bits for files */
public static final int DEFAULT_FILE_MODE = 0100644;
/** Convert millis to seconds */
public static final int MILLIS_PER_SECOND = 1000;
/**
* Construct an empty entry and prepares the header values.
*/
private TarEntry () {
this.magic = new StringBuilder(TMAGIC);
this.name = new StringBuilder();
this.linkName = new StringBuilder();
String user = System.getProperty("user.name", "");
if (user.length() > MAX_NAMELEN) {
user = user.substring(0, MAX_NAMELEN);
}
this.userId = 0;
this.groupId = 0;
this.userName = new StringBuilder(user);
this.groupName = new StringBuilder("");
this.file = null;
}
/**
* Construct an entry with only a name. This allows the programmer
* to construct the entry's header "by hand". File is set to null.
*
* @param name the entry name
*/
public TarEntry(final String name) {
this();
final boolean isDir = name.endsWith("/");
this.devMajor = 0;
this.devMinor = 0;
this.name = new StringBuilder(name);
this.mode = isDir ? DEFAULT_DIR_MODE : DEFAULT_FILE_MODE;
this.linkFlag = isDir ? LF_DIR : LF_NORMAL;
this.userId = 0;
this.groupId = 0;
this.size = 0;
this.modTime = (new Date()).getTime() / MILLIS_PER_SECOND;
this.linkName = new StringBuilder("");
this.userName = new StringBuilder("");
this.groupName = new StringBuilder("");
this.devMajor = 0;
this.devMinor = 0;
}
/**
* Construct an entry with a name an a link flag.
*
* @param name the entry name
* @param linkFlag the entry link flag.
*/
public TarEntry(final String name, final byte linkFlag) {
this(name);
this.linkFlag = linkFlag;
}
/**
* Construct an entry for a file. File is set to file, and the
* header is constructed from information from the file.
*
* @param file The file that the entry represents.
*/
public TarEntry(final File file) {
this();
this.file = file;
String fileName = file.getPath();
final String osname = System.getProperty("os.name").toLowerCase(Locale.US);
if (osname != null) {
// Strip off drive letters!
// REVIEW Would a better check be "(File.separator == '\')"?
if (osname.startsWith("windows")) {
if (fileName.length() > 2) {
final char ch1 = fileName.charAt(0);
final char ch2 = fileName.charAt(1);
if (ch2 == ':'
&& ((ch1 >= 'a' && ch1 <= 'z')
|| (ch1 >= 'A' && ch1 <= 'Z'))) {
fileName = fileName.substring(2);
}
}
} else if (osname.indexOf("netware",0) > -1) {
final int colon = fileName.indexOf(':');
if (colon != -1) {
fileName = fileName.substring(colon + 1);
}
}
}
fileName = fileName.replace(File.separatorChar, '/');
// No absolute pathnames
// Windows (and Posix?) paths can start with "\\NetworkDrive\",
// so we loop on starting /'s.
while (fileName.length() > 0 && fileName.charAt(0) == '/') {
fileName = fileName.substring(1);
}
this.linkName = new StringBuilder("");
this.name = new StringBuilder(fileName);
if (file.isDirectory()) {
this.mode = DEFAULT_DIR_MODE;
this.linkFlag = LF_DIR;
if (this.name.charAt(this.name.length() - 1) != '/') {
this.name.append("/");
}
} else {
this.mode = DEFAULT_FILE_MODE;
this.linkFlag = LF_NORMAL;
}
this.size = file.length();
this.modTime = file.lastModified() / MILLIS_PER_SECOND;
this.devMajor = 0;
this.devMinor = 0;
}
/**
* Construct an entry from an archive's header bytes. File is set
* to null.
*
* @param headerBuf The header bytes from a tar archive entry.
*/
public TarEntry(final byte[] headerBuf) {
this();
parseTarHeader(headerBuf);
}
/**
* Determine if the two entries are equal. Equality is determined
* by the header names being equal.
*
* @param it Entry to be checked for equality.
* @return True if the entries are equal.
*/
@Override
public boolean equals(final Object obj) {
if (this == obj) return true;
if (obj == null) return false;
if (!(obj instanceof TarEntry)) return false;
final TarEntry other = (TarEntry) obj;
return getName().equals(other.getName());
}
/**
* Hashcodes are based on entry names.
*
* @return the entry hashcode
*/
@Override
public int hashCode() {
return getName().hashCode();
}
/**
* Determine if the given entry is a descendant of this entry.
* Descendancy is determined by the name of the descendant
* starting with this entry's name.
*
* @param desc Entry to be checked as a descendent of this.
* @return True if entry is a descendant of this.
*/
public boolean isDescendent(final TarEntry desc) {
return desc.getName().startsWith(getName());
}
/**
* Get this entry's name.
*
* @return This entry's name.
*/
public String getName() {
return this.name.toString();
}
/**
* Set this entry's name.
*
* @param name This entry's new name.
*/
public void setName(final String name) {
this.name = new StringBuilder(name);
}
/**
* Set the mode for this entry
*
* @param mode the mode for this entry
*/
public void setMode(final int mode) {
this.mode = mode;
}
/**
* Get this entry's link name.
*
* @return This entry's link name.
*/
public String getLinkName() {
return this.linkName.toString();
}
/**
* Get this entry's user id.
*
* @return This entry's user id.
*/
public int getUserId() {
return this.userId;
}
/**
* Set this entry's user id.
*
* @param userId This entry's new user id.
*/
public void setUserId(final int userId) {
this.userId = userId;
}
/**
* Get this entry's group id.
*
* @return This entry's group id.
*/
public int getGroupId() {
return this.groupId;
}
/**
* Set this entry's group id.
*
* @param groupId This entry's new group id.
*/
public void setGroupId(final int groupId) {
this.groupId = groupId;
}
/**
* Get this entry's user name.
*
* @return This entry's user name.
*/
public String getUserName() {
return this.userName.toString();
}
/**
* Set this entry's user name.
*
* @param userName This entry's new user name.
*/
public void setUserName(final String userName) {
this.userName = new StringBuilder(userName);
}
/**
* Get this entry's group name.
*
* @return This entry's group name.
*/
public String getGroupName() {
return this.groupName.toString();
}
/**
* Set this entry's group name.
*
* @param groupName This entry's new group name.
*/
public void setGroupName(final String groupName) {
this.groupName = new StringBuilder(groupName);
}
/**
* Convenience method to set this entry's group and user ids.
*
* @param userId This entry's new user id.
* @param groupId This entry's new group id.
*/
public void setIds(final int userId, final int groupId) {
setUserId(userId);
setGroupId(groupId);
}
/**
* Convenience method to set this entry's group and user names.
*
* @param userName This entry's new user name.
* @param groupName This entry's new group name.
*/
public void setNames(final String userName, final String groupName) {
setUserName(userName);
setGroupName(groupName);
}
/**
* Set this entry's modification time. The parameter passed
* to this method is in "Java time".
*
* @param time This entry's new modification time.
*/
public void setModTime(final long time) {
this.modTime = time / MILLIS_PER_SECOND;
}
/**
* Set this entry's modification time.
*
* @param time This entry's new modification time.
*/
public void setModTime(final Date time) {
this.modTime = time.getTime() / MILLIS_PER_SECOND;
}
/**
* Set this entry's modification time.
*
* @return time This entry's new modification time.
*/
public Date getModTime() {
return new Date(this.modTime * MILLIS_PER_SECOND);
}
/**
* Get this entry's file.
*
* @return This entry's file.
*/
public File getFile() {
return this.file;
}
/**
* Get this entry's mode.
*
* @return This entry's mode.
*/
public int getMode() {
return this.mode;
}
/**
* Get this entry's file size.
*
* @return This entry's file size.
*/
public long getSize() {
return this.size;
}
/**
* Set this entry's file size.
*
* @param size This entry's new file size.
*/
public void setSize(final long size) {
this.size = size;
}
/**
* Indicate if this entry is a GNU long name block
*
* @return true if this is a long name extension provided by GNU tar
*/
public boolean isGNULongNameEntry() {
return this.linkFlag == LF_GNUTYPE_LONGNAME
&& this.name.toString().equals(GNU_LONGLINK);
}
/**
* Return whether or not this entry represents a directory.
*
* @return True if this entry is a directory.
*/
public boolean isDirectory() {
if (this.file != null) {
return this.file.isDirectory();
}
if (this.linkFlag == LF_DIR) {
return true;
}
if (getName().endsWith("/")) {
return true;
}
return false;
}
/**
* If this entry represents a file, and the file is a directory, return
* an array of TarEntries for this entry's children.
*
* @return An array of TarEntry's for this entry's children.
*/
public TarEntry[] getDirectoryEntries() {
if (this.file == null || !this.file.isDirectory()) {
return new TarEntry[0];
}
final String[] list = this.file.list();
final TarEntry[] result = new TarEntry[list.length];
for (int i = 0; i < list.length; ++i) {
result[i] = new TarEntry(new File(this.file, list[i]));
}
return result;
}
/**
* Write an entry's header information to a header buffer.
*
* @param outbuf The tar entry header buffer to fill in.
*/
public void writeEntryHeader(final byte[] outbuf) {
int offset = 0;
offset = TarUtils.getNameBytes(this.name, outbuf, offset, NAMELEN);
offset = TarUtils.getOctalBytes(this.mode, outbuf, offset, MODELEN);
offset = TarUtils.getOctalBytes(this.userId, outbuf, offset, UIDLEN);
offset = TarUtils.getOctalBytes(this.groupId, outbuf, offset, GIDLEN);
offset = TarUtils.getLongOctalBytes(this.size, outbuf, offset, SIZELEN);
offset = TarUtils.getLongOctalBytes(this.modTime, outbuf, offset, MODTIMELEN);
final int csOffset = offset;
for (int c = 0; c < CHKSUMLEN; ++c) {
outbuf[offset++] = (byte) ' ';
}
outbuf[offset++] = this.linkFlag;
offset = TarUtils.getNameBytes(this.linkName, outbuf, offset, NAMELEN);
offset = TarUtils.getNameBytes(this.magic, outbuf, offset, MAGICLEN);
offset = TarUtils.getNameBytes(this.userName, outbuf, offset, UNAMELEN);
offset = TarUtils.getNameBytes(this.groupName, outbuf, offset, GNAMELEN);
offset = TarUtils.getOctalBytes(this.devMajor, outbuf, offset, DEVLEN);
offset = TarUtils.getOctalBytes(this.devMinor, outbuf, offset, DEVLEN);
while (offset < outbuf.length) {
outbuf[offset++] = 0;
}
final long chk = TarUtils.computeCheckSum(outbuf);
TarUtils.getCheckSumOctalBytes(chk, outbuf, csOffset, CHKSUMLEN);
}
/**
* Parse an entry's header information from a header buffer.
*
* @param header The tar entry header buffer to get information from.
*/
public void parseTarHeader(final byte[] header) {
int offset = 0;
this.name = TarUtils.parseName(header, offset, NAMELEN);
offset += NAMELEN;
this.mode = (int) TarUtils.parseOctal(header, offset, MODELEN);
offset += MODELEN;
this.userId = (int) TarUtils.parseOctal(header, offset, UIDLEN);
offset += UIDLEN;
this.groupId = (int) TarUtils.parseOctal(header, offset, GIDLEN);
offset += GIDLEN;
this.size = TarUtils.parseOctal(header, offset, SIZELEN);
offset += SIZELEN;
this.modTime = TarUtils.parseOctal(header, offset, MODTIMELEN);
offset += MODTIMELEN;
offset += CHKSUMLEN;
this.linkFlag = header[offset++];
this.linkName = TarUtils.parseName(header, offset, NAMELEN);
offset += NAMELEN;
this.magic = TarUtils.parseName(header, offset, MAGICLEN);
offset += MAGICLEN;
this.userName = TarUtils.parseName(header, offset, UNAMELEN);
offset += UNAMELEN;
this.groupName = TarUtils.parseName(header, offset, GNAMELEN);
offset += GNAMELEN;
this.devMajor = (int) TarUtils.parseOctal(header, offset, DEVLEN);
offset += DEVLEN;
this.devMinor = (int) TarUtils.parseOctal(header, offset, DEVLEN);
}
}

409
source/org/apache/tools/tar/TarInputStream.java
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@ -1,409 +0,0 @@
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
/*
* This package is based on the work done by Timothy Gerard Endres
* (time@ice.com) to whom the Ant project is very grateful for his great code.
*/
/*
* Modifications (Michael Christen)
* - replaced StringBuffer with StringBuilder
*/
package org.apache.tools.tar;
import java.io.FilterInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
/**
* The TarInputStream reads a UNIX tar archive as an InputStream.
* methods are provided to position at each successive entry in
* the archive, and the read each entry as a normal input stream
* using read().
*
*/
public class TarInputStream extends FilterInputStream {
private static final int SMALL_BUFFER_SIZE = 256;
private static final int BUFFER_SIZE = 8 * 1024;
private static final int LARGE_BUFFER_SIZE = 32 * 1024;
private static final int BYTE_MASK = 0xFF;
// CheckStyle:VisibilityModifier OFF - bc
protected boolean debug;
protected boolean hasHitEOF;
protected long entrySize;
protected long entryOffset;
protected byte[] readBuf;
protected TarBuffer buffer;
protected TarEntry currEntry;
/**
* This contents of this array is not used at all in this class,
* it is only here to avoid repreated object creation during calls
* to the no-arg read method.
*/
protected byte[] oneBuf;
// CheckStyle:VisibilityModifier ON
/**
* Constructor for TarInputStream.
* @param is the input stream to use
*/
public TarInputStream(InputStream is) {
this(is, TarBuffer.DEFAULT_BLKSIZE, TarBuffer.DEFAULT_RCDSIZE);
}
/**
* Constructor for TarInputStream.
* @param is the input stream to use
* @param blockSize the block size to use
*/
public TarInputStream(InputStream is, int blockSize) {
this(is, blockSize, TarBuffer.DEFAULT_RCDSIZE);
}
/**
* Constructor for TarInputStream.
* @param is the input stream to use
* @param blockSize the block size to use
* @param recordSize the record size to use
*/
public TarInputStream(InputStream is, int blockSize, int recordSize) {
super(is);
this.buffer = new TarBuffer(is, blockSize, recordSize);
this.readBuf = null;
this.oneBuf = new byte[1];
this.debug = false;
this.hasHitEOF = false;
}
/**
* Sets the debugging flag.
*
* @param debug True to turn on debugging.
*/
public void setDebug(boolean debug) {
this.debug = debug;
this.buffer.setDebug(debug);
}
/**
* Closes this stream. Calls the TarBuffer's close() method.
* @throws IOException on error
*/
@Override
public synchronized void close() throws IOException {
this.buffer.close();
}
/**
* Get the record size being used by this stream's TarBuffer.
*
* @return The TarBuffer record size.
*/
public int getRecordSize() {
return this.buffer.getRecordSize();
}
/**
* Get the available data that can be read from the current
* entry in the archive. This does not indicate how much data
* is left in the entire archive, only in the current entry.
* This value is determined from the entry's size header field
* and the amount of data already read from the current entry.
* Integer.MAX_VALUE is returen in case more than Integer.MAX_VALUE
* bytes are left in the current entry in the archive.
*
* @return The number of available bytes for the current entry.
* @throws IOException for signature
*/
@Override
public int available() throws IOException {
if (this.entrySize - this.entryOffset > Integer.MAX_VALUE) {
return Integer.MAX_VALUE;
}
return (int) (this.entrySize - this.entryOffset);
}
/**
* Skip bytes in the input buffer. This skips bytes in the
* current entry's data, not the entire archive, and will
* stop at the end of the current entry's data if the number
* to skip extends beyond that point.
*
* @param numToSkip The number of bytes to skip.
* @return the number actually skipped
* @throws IOException on error
*/
@Override
public long skip(long numToSkip) throws IOException {
// REVIEW
// This is horribly inefficient, but it ensures that we
// properly skip over bytes via the TarBuffer...
//
byte[] skipBuf = new byte[BUFFER_SIZE];
long skip = numToSkip;
while (skip > 0) {
int realSkip = (int) (skip > skipBuf.length ? skipBuf.length : skip);
int numRead = this.read(skipBuf, 0, realSkip);
if (numRead == -1) {
break;
}
skip -= numRead;
}
return (numToSkip - skip);
}
/**
* Since we do not support marking just yet, we return false.
*
* @return False.
*/
@Override
public boolean markSupported() {
return false;
}
/**
* Since we do not support marking just yet, we do nothing.
*
* @param markLimit The limit to mark.
*/
@Override
public synchronized void mark(int markLimit) {
}
/**
* Since we do not support marking just yet, we do nothing.
*/
@Override
public synchronized void reset() {
}
/**
* Get the next entry in this tar archive. This will skip
* over any remaining data in the current entry, if there
* is one, and place the input stream at the header of the
* next entry, and read the header and instantiate a new
* TarEntry from the header bytes and return that entry.
* If there are no more entries in the archive, null will
* be returned to indicate that the end of the archive has
* been reached.
*
* @return The next TarEntry in the archive, or null.
* @throws IOException on error
*/
public TarEntry getNextEntry() throws IOException {
if (this.hasHitEOF) {
return null;
}
if (this.currEntry != null) {
long numToSkip = this.entrySize - this.entryOffset;
if (this.debug) {
System.err.println("TarInputStream: SKIP currENTRY '"
+ this.currEntry.getName() + "' SZ "
+ this.entrySize + " OFF "
+ this.entryOffset + " skipping "
+ numToSkip + " bytes");
}
if (numToSkip > 0) {
this.skip(numToSkip);
}
this.readBuf = null;
}
byte[] headerBuf = this.buffer.readRecord();
if (headerBuf == null) {
if (this.debug) {
System.err.println("READ NULL RECORD");
}
this.hasHitEOF = true;
} else if (this.buffer.isEOFRecord(headerBuf)) {
if (this.debug) {
System.err.println("READ EOF RECORD");
}
this.hasHitEOF = true;
}
if (this.hasHitEOF) {
this.currEntry = null;
} else {
this.currEntry = new TarEntry(headerBuf);
if (this.debug) {
System.err.println("TarInputStream: SET CURRENTRY '"
+ this.currEntry.getName()
+ "' size = "
+ this.currEntry.getSize());
}
this.entryOffset = 0;
this.entrySize = this.currEntry.getSize();
}
if (this.currEntry != null && this.currEntry.isGNULongNameEntry()) {
// read in the name
StringBuilder longName = new StringBuilder();
byte[] buf = new byte[SMALL_BUFFER_SIZE];
int length = 0;
while ((length = read(buf)) >= 0) {
longName.append(new String(buf, 0, length));
}
getNextEntry();
if (this.currEntry == null) {
// Bugzilla: 40334
// Malformed tar file - long entry name not followed by entry
return null;
}
// remove trailing null terminator
if (longName.length() > 0
&& longName.charAt(longName.length() - 1) == 0) {
longName.deleteCharAt(longName.length() - 1);
}
this.currEntry.setName(longName.toString());
}
return this.currEntry;
}
/**
* Reads a byte from the current tar archive entry.
*
* This method simply calls read( byte[], int, int ).
*
* @return The byte read, or -1 at EOF.
* @throws IOException on error
*/
@Override
public int read() throws IOException {
int num = this.read(this.oneBuf, 0, 1);
return num == -1 ? -1 : (this.oneBuf[0]) & BYTE_MASK;
}
/**
* Reads bytes from the current tar archive entry.
*
* This method is aware of the boundaries of the current
* entry in the archive and will deal with them as if they
* were this stream's start and EOF.
*
* @param buf The buffer into which to place bytes read.
* @param offset The offset at which to place bytes read.
* @param numToRead The number of bytes to read.
* @return The number of bytes read, or -1 at EOF.
* @throws IOException on error
*/
@Override
public int read(byte[] buf, int offset, int numToRead) throws IOException {
int totalRead = 0;
if (this.entryOffset >= this.entrySize) {
return -1;
}
if ((numToRead + this.entryOffset) > this.entrySize) {
numToRead = (int) (this.entrySize - this.entryOffset);
}
if (this.readBuf != null) {
int sz = (numToRead > this.readBuf.length) ? this.readBuf.length
: numToRead;
System.arraycopy(this.readBuf, 0, buf, offset, sz);
if (sz >= this.readBuf.length) {
this.readBuf = null;
} else {
int newLen = this.readBuf.length - sz;
byte[] newBuf = new byte[newLen];
System.arraycopy(this.readBuf, sz, newBuf, 0, newLen);
this.readBuf = newBuf;
}
totalRead += sz;
numToRead -= sz;
offset += sz;
}
while (numToRead > 0) {
byte[] rec = this.buffer.readRecord();
if (rec == null) {
// Unexpected EOF!
throw new IOException("unexpected EOF with " + numToRead
+ " bytes unread");
}
int sz = numToRead;
int recLen = rec.length;
if (recLen > sz) {
System.arraycopy(rec, 0, buf, offset, sz);
this.readBuf = new byte[recLen - sz];
System.arraycopy(rec, sz, this.readBuf, 0, recLen - sz);
} else {
sz = recLen;
System.arraycopy(rec, 0, buf, offset, recLen);
}
totalRead += sz;
numToRead -= sz;
offset += sz;
}
this.entryOffset += totalRead;
return totalRead;
}
/**
* Copies the contents of the current tar archive entry directly into
* an output stream.
*
* @param out The OutputStream into which to write the entry's data.
* @throws IOException on error
*/
public void copyEntryContents(OutputStream out) throws IOException {
byte[] buf = new byte[LARGE_BUFFER_SIZE];
while (true) {
int numRead = this.read(buf, 0, buf.length);
if (numRead == -1) {
break;
}
out.write(buf, 0, numRead);
}
}
}

359
source/org/apache/tools/tar/TarOutputStream.java
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@ -1,359 +0,0 @@
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
/*
* This package is based on the work done by Timothy Gerard Endres
* (time@ice.com) to whom the Ant project is very grateful for his great code.
*/
package org.apache.tools.tar;
import java.io.FilterOutputStream;
import java.io.OutputStream;
import java.io.IOException;
/**
* The TarOutputStream writes a UNIX tar archive as an OutputStream.
* Methods are provided to put entries, and then write their contents
* by writing to this stream using write().
*
*/
public class TarOutputStream extends FilterOutputStream {
/** Fail if a long file name is required in the archive. */
public static final int LONGFILE_ERROR = 0;
/** Long paths will be truncated in the archive. */
public static final int LONGFILE_TRUNCATE = 1;
/** GNU tar extensions are used to store long file names in the archive. */
public static final int LONGFILE_GNU = 2;
// CheckStyle:VisibilityModifier OFF - bc
protected boolean debug;
protected long currSize;
protected String currName;
protected long currBytes;
protected byte[] oneBuf;
protected byte[] recordBuf;
protected int assemLen;
protected byte[] assemBuf;
protected TarBuffer buffer;
protected int longFileMode = LONGFILE_ERROR;
// CheckStyle:VisibilityModifier ON
private boolean closed = false;
/**
* Constructor for TarInputStream.
* @param os the output stream to use
*/
public TarOutputStream(OutputStream os) {
this(os, TarBuffer.DEFAULT_BLKSIZE, TarBuffer.DEFAULT_RCDSIZE);
}
/**
* Constructor for TarInputStream.
* @param os the output stream to use
* @param blockSize the block size to use
*/
public TarOutputStream(OutputStream os, int blockSize) {
this(os, blockSize, TarBuffer.DEFAULT_RCDSIZE);
}
/**
* Constructor for TarInputStream.
* @param os the output stream to use
* @param blockSize the block size to use
* @param recordSize the record size to use
*/
public TarOutputStream(OutputStream os, int blockSize, int recordSize) {
super(os);
this.buffer = new TarBuffer(os, blockSize, recordSize);
this.debug = false;
this.assemLen = 0;
this.assemBuf = new byte[recordSize];
this.recordBuf = new byte[recordSize];
this.oneBuf = new byte[1];
}
/**
* Set the long file mode.
* This can be LONGFILE_ERROR(0), LONGFILE_TRUNCATE(1) or LONGFILE_GNU(2).
* This specifies the treatment of long file names (names >= TarConstants.NAMELEN).
* Default is LONGFILE_ERROR.
* @param longFileMode the mode to use
*/
public void setLongFileMode(int longFileMode) {
this.longFileMode = longFileMode;
}
/**
* Sets the debugging flag.
*
* @param debugF True to turn on debugging.
*/
public void setDebug(boolean debugF) {
this.debug = debugF;
}
/**
* Sets the debugging flag in this stream's TarBuffer.
*
* @param debug True to turn on debugging.
*/
public void setBufferDebug(boolean debug) {
this.buffer.setDebug(debug);
}
/**
* Ends the TAR archive without closing the underlying OutputStream.
* The result is that the two EOF records of nulls are written.
* @throws IOException on error
*/
public void finish() throws IOException {
// See Bugzilla 28776 for a discussion on this
// http://issues.apache.org/bugzilla/show_bug.cgi?id=28776
this.writeEOFRecord();
this.writeEOFRecord();
}
/**
* Ends the TAR archive and closes the underlying OutputStream.
* This means that finish() is called followed by calling the
* TarBuffer's close().
* @throws IOException on error
*/
@Override
public synchronized void close() throws IOException {
if (!closed) {
this.finish();
this.buffer.close();
out.close();
closed = true;
}
}
/**
* Get the record size being used by this stream's TarBuffer.
*
* @return The TarBuffer record size.
*/
public int getRecordSize() {
return this.buffer.getRecordSize();
}
/**
* Put an entry on the output stream. This writes the entry's
* header record and positions the output stream for writing
* the contents of the entry. Once this method is called, the
* stream is ready for calls to write() to write the entry's
* contents. Once the contents are written, closeEntry()
* <B>MUST</B> be called to ensure that all buffered data
* is completely written to the output stream.
*
* @param entry The TarEntry to be written to the archive.
* @throws IOException on error
*/
public void putNextEntry(TarEntry entry) throws IOException {
if (entry.getName().length() >= TarConstants.NAMELEN) {
if (longFileMode == LONGFILE_GNU) {
// create a TarEntry for the LongLink, the contents
// of which are the entry's name
TarEntry longLinkEntry = new TarEntry(TarConstants.GNU_LONGLINK,
TarConstants.LF_GNUTYPE_LONGNAME);
longLinkEntry.setSize(entry.getName().length() + 1);
putNextEntry(longLinkEntry);
write(entry.getName().getBytes());
write(0);
closeEntry();
} else if (longFileMode != LONGFILE_TRUNCATE) {
throw new RuntimeException("file name '" + entry.getName()
+ "' is too long ( > "
+ TarConstants.NAMELEN + " bytes)");
}
}
entry.writeEntryHeader(this.recordBuf);
this.buffer.writeRecord(this.recordBuf);
this.currBytes = 0;
if (entry.isDirectory()) {
this.currSize = 0;
} else {
this.currSize = entry.getSize();
}
currName = entry.getName();
}
/**
* Close an entry. This method MUST be called for all file
* entries that contain data. The reason is that we must
* buffer data written to the stream in order to satisfy
* the buffer's record based writes. Thus, there may be
* data fragments still being assembled that must be written
* to the output stream before this entry is closed and the
* next entry written.
* @throws IOException on error
*/
public void closeEntry() throws IOException {
if (this.assemLen > 0) {
for (int i = this.assemLen; i < this.assemBuf.length; ++i) {
this.assemBuf[i] = 0;
}
this.buffer.writeRecord(this.assemBuf);
this.currBytes += this.assemLen;
this.assemLen = 0;
}
if (this.currBytes < this.currSize) {
throw new IOException("entry '" + currName + "' closed at '"
+ this.currBytes
+ "' before the '" + this.currSize
+ "' bytes specified in the header were written");
}
}
/**
* Writes a byte to the current tar archive entry.
*
* This method simply calls read( byte[], int, int ).
*
* @param b The byte written.
* @throws IOException on error
*/
@Override
public void write(int b) throws IOException {
this.oneBuf[0] = (byte) b;
this.write(this.oneBuf, 0, 1);
}
/**
* Writes bytes to the current tar archive entry.
*
* This method simply calls write( byte[], int, int ).
*
* @param wBuf The buffer to write to the archive.
* @throws IOException on error
*/
@Override
public void write(byte[] wBuf) throws IOException {
this.write(wBuf, 0, wBuf.length);
}
/**
* Writes bytes to the current tar archive entry. This method
* is aware of the current entry and will throw an exception if
* you attempt to write bytes past the length specified for the
* current entry. The method is also (painfully) aware of the
* record buffering required by TarBuffer, and manages buffers
* that are not a multiple of recordsize in length, including
* assembling records from small buffers.
*
* @param wBuf The buffer to write to the archive.
* @param wOffset The offset in the buffer from which to get bytes.
* @param numToWrite The number of bytes to write.
* @throws IOException on error
*/
@Override
public void write(byte[] wBuf, int wOffset, int numToWrite) throws IOException {
if ((this.currBytes + numToWrite) > this.currSize) {
throw new IOException("request to write '" + numToWrite
+ "' bytes exceeds size in header of '"
+ this.currSize + "' bytes for entry '"
+ currName + "'");
//
// We have to deal with assembly!!!
// The programmer can be writing little 32 byte chunks for all
// we know, and we must assemble complete records for writing.
// REVIEW Maybe this should be in TarBuffer? Could that help to
// eliminate some of the buffer copying.
//
}
if (this.assemLen > 0) {
if ((this.assemLen + numToWrite) >= this.recordBuf.length) {
int aLen = this.recordBuf.length - this.assemLen;
System.arraycopy(this.assemBuf, 0, this.recordBuf, 0,
this.assemLen);
System.arraycopy(wBuf, wOffset, this.recordBuf,
this.assemLen, aLen);
this.buffer.writeRecord(this.recordBuf);
this.currBytes += this.recordBuf.length;
wOffset += aLen;
numToWrite -= aLen;
this.assemLen = 0;
} else {
System.arraycopy(wBuf, wOffset, this.assemBuf, this.assemLen,
numToWrite);
wOffset += numToWrite;
this.assemLen += numToWrite;
numToWrite -= numToWrite;
}
}
//
// When we get here we have EITHER:
// o An empty "assemble" buffer.
// o No bytes to write (numToWrite == 0)
//
while (numToWrite > 0) {
if (numToWrite < this.recordBuf.length) {
System.arraycopy(wBuf, wOffset, this.assemBuf, this.assemLen,
numToWrite);
this.assemLen += numToWrite;
break;
}
this.buffer.writeRecord(wBuf, wOffset);
int num = this.recordBuf.length;
this.currBytes += num;
numToWrite -= num;
wOffset += num;
}
}
/**
* Write an EOF (end of archive) record to the tar archive.
* An EOF record consists of a record of all zeros.
*/
private void writeEOFRecord() throws IOException {
for (int i = 0; i < this.recordBuf.length; ++i) {
this.recordBuf[i] = 0;
}
this.buffer.writeRecord(this.recordBuf);
}
}

210
source/org/apache/tools/tar/TarUtils.java
Unescape View File

@ -1,210 +0,0 @@
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
/*
* This package is based on the work done by Timothy Gerard Endres
* (time@ice.com) to whom the Ant project is very grateful for his great code.
*/
/*
* Modifications (Michael Christen)
* - replaced StringBuffer with StringBuilder
*/
package org.apache.tools.tar;
/**
* This class provides static utility methods to work with byte streams.
*
*/
// CheckStyle:HideUtilityClassConstructorCheck OFF (bc)
public class TarUtils {
private static final int BYTE_MASK = 255;
/**
* Parse an octal string from a header buffer. This is used for the
* file permission mode value.
*
* @param header The header buffer from which to parse.
* @param offset The offset into the buffer from which to parse.
* @param length The number of header bytes to parse.
* @return The long value of the octal string.
*/
public static long parseOctal(byte[] header, int offset, int length) {
long result = 0;
boolean stillPadding = true;
int end = offset + length;
for (int i = offset; i < end; ++i) {
if (header[i] == 0) {
break;
}
if (header[i] == (byte) ' ' || header[i] == '0') {
if (stillPadding) {
continue;
}
if (header[i] == (byte) ' ') {
break;
}
}
stillPadding = false;
// CheckStyle:MagicNumber OFF
result = (result << 3) + (header[i] - '0');
// CheckStyle:MagicNumber ON
}
return result;
}
/**
* Parse an entry name from a header buffer.
*
* @param header The header buffer from which to parse.
* @param offset The offset into the buffer from which to parse.
* @param length The number of header bytes to parse.
* @return The header's entry name.
*/
public static StringBuilder parseName(byte[] header, int offset, int length) {
StringBuilder result = new StringBuilder(length);
int end = offset + length;
for (int i = offset; i < end; ++i) {
if (header[i] == 0) {
break;
}
result.append((char) header[i]);
}
return result;
}
/**
* Determine the number of bytes in an entry name.
*
* @param name The header name from which to parse.
* @param buf The buffer from which to parse.
* @param offset The offset into the buffer from which to parse.
* @param length The number of header bytes to parse.
* @return The number of bytes in a header's entry name.
*/
public static int getNameBytes(StringBuilder name, byte[] buf, int offset, int length) {
int i;
for (i = 0; i < length && i < name.length(); ++i) {
buf[offset + i] = (byte) name.charAt(i);
}
for (; i < length; ++i) {
buf[offset + i] = 0;
}
return offset + length;
}
/**
* Parse an octal integer from a header buffer.
*
* @param value The header value
* @param buf The buffer from which to parse.
* @param offset The offset into the buffer from which to parse.
* @param length The number of header bytes to parse.
* @return The integer value of the octal bytes.
*/
public static int getOctalBytes(long value, byte[] buf, int offset, int length) {
int idx = length - 1;
buf[offset + idx] = 0;
--idx;
buf[offset + idx] = (byte) ' ';
--idx;
if (value == 0) {
buf[offset + idx] = (byte) '0';
--idx;
} else {
for (long val = value; idx >= 0 && val > 0; --idx) {
// CheckStyle:MagicNumber OFF
buf[offset + idx] = (byte) ((byte) '0' + (byte) (val & 7));
val = val >> 3;
// CheckStyle:MagicNumber ON
}
}
for (; idx >= 0; --idx) {
buf[offset + idx] = (byte) ' ';
}
return offset + length;
}
/**
* Parse an octal long integer from a header buffer.
*
* @param value The header value
* @param buf The buffer from which to parse.
* @param offset The offset into the buffer from which to parse.
* @param length The number of header bytes to parse.
* @return The long value of the octal bytes.
*/
public static int getLongOctalBytes(long value, byte[] buf, int offset, int length) {
byte[] temp = new byte[length + 1];
getOctalBytes(value, temp, 0, length + 1);
System.arraycopy(temp, 0, buf, offset, length);
return offset + length;
}
/**
* Parse the checksum octal integer from a header buffer.
*
* @param value The header value
* @param buf The buffer from which to parse.
* @param offset The offset into the buffer from which to parse.
* @param length The number of header bytes to parse.
* @return The integer value of the entry's checksum.
*/
public static int getCheckSumOctalBytes(long value, byte[] buf, int offset, int length) {
getOctalBytes(value, buf, offset, length);
buf[offset + length - 1] = (byte) ' ';
buf[offset + length - 2] = 0;
return offset + length;
}
/**
* Compute the checksum of a tar entry header.
*
* @param buf The tar entry's header buffer.
* @return The computed checksum.
*/
public static long computeCheckSum(byte[] buf) {
long sum = 0;
for (int i = 0; i < buf.length; ++i) {
sum += BYTE_MASK & buf[i];
}
return sum;
}
}
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