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Diffstat (limited to 'framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/tar/TarEntry.java')
| -rw-r--r-- | framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/tar/TarEntry.java | 1149 |
1 files changed, 0 insertions, 1149 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/tar/TarEntry.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/tar/TarEntry.java deleted file mode 100644 index a9c96f13..00000000 --- a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/tar/TarEntry.java +++ /dev/null @@ -1,1149 +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.File; -import java.io.IOException; -import java.io.UnsupportedEncodingException; -import java.util.Date; -import java.util.Locale; - -import org.apache.tools.zip.ZipEncoding; - -/** - * 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; - * All unused bytes are set to null. - * New-style GNU tar files are slightly different from the above. - * For values of size larger than 077777777777L (11 7s) - * or uid and gid larger than 07777777L (7 7s) - * the sign bit of the first byte is set, and the rest of the - * field is the binary representation of the number. - * See TarUtils.parseOctalOrBinary. - * </pre> - * - * <p> - * The C structure for a old GNU Tar Entry's header is: - * <pre> - * struct oldgnu_header { - * char unused_pad1[345]; // TarConstants.PAD1LEN_GNU - offset 0 - * char atime[12]; // TarConstants.ATIMELEN_GNU - offset 345 - * char ctime[12]; // TarConstants.CTIMELEN_GNU - offset 357 - * char offset[12]; // TarConstants.OFFSETLEN_GNU - offset 369 - * char longnames[4]; // TarConstants.LONGNAMESLEN_GNU - offset 381 - * char unused_pad2; // TarConstants.PAD2LEN_GNU - offset 385 - * struct sparse sp[4]; // TarConstants.SPARSELEN_GNU - offset 386 - * char isextended; // TarConstants.ISEXTENDEDLEN_GNU - offset 482 - * char realsize[12]; // TarConstants.REALSIZELEN_GNU - offset 483 - * char unused_pad[17]; // TarConstants.PAD3LEN_GNU - offset 495 - * }; - * </pre> - * Whereas, "struct sparse" is: - * <pre> - * struct sparse { - * char offset[12]; // offset 0 - * char numbytes[12]; // offset 12 - * }; - * </pre> - * - */ - -public class TarEntry implements TarConstants { - /** The entry's name. */ - private String name; - - /** The entry's permission mode. */ - private int mode; - - /** The entry's user id. */ - private long userId; - - /** The entry's group id. */ - private long 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 String linkName; - - /** The entry's magic tag. */ - private String magic; - /** The version of the format */ - private String version; - - /** The entry's user name. */ - private String userName; - - /** The entry's group name. */ - private String groupName; - - /** The entry's major device number. */ - private int devMajor; - - /** The entry's minor device number. */ - private int devMinor; - - /** If an extension sparse header follows. */ - private boolean isExtended; - - /** The entry's real size in case of a sparse file. */ - private long realSize; - - /** 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 = MAGIC_POSIX; - this.version = VERSION_POSIX; - this.name = ""; - this.linkName = ""; - - 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 = user; - this.groupName = ""; - 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(String name) { - this(name, false); - } - - /** - * 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 - * @param preserveLeadingSlashes whether to allow leading slashes - * in the name. - */ - public TarEntry(String name, boolean preserveLeadingSlashes) { - this(); - - name = normalizeFileName(name, preserveLeadingSlashes); - boolean isDir = name.endsWith("/"); - - this.devMajor = 0; - this.devMinor = 0; - this.name = 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 = ""; - this.userName = ""; - this.groupName = ""; - } - - /** - * Construct an entry with a name and a link flag. - * - * @param name the entry name - * @param linkFlag the entry link flag. - */ - public TarEntry(String name, byte linkFlag) { - this(name); - this.linkFlag = linkFlag; - if (linkFlag == LF_GNUTYPE_LONGNAME) { - magic = GNU_TMAGIC; - version = VERSION_GNU_SPACE; - } - } - - /** - * Construct an entry for a file. File is set to file, and the - * header is constructed from information from the file. - * The name is set from the normalized file path. - * - * @param file The file that the entry represents. - */ - public TarEntry(File file) { - this(file, file.getPath()); - } - - /** - * 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. - * @param fileName the name to be used for the entry. - */ - public TarEntry(File file, String fileName) { - this(); - - String normalizedName = normalizeFileName(fileName, false); - this.file = file; - - this.linkName = ""; - - if (file.isDirectory()) { - this.mode = DEFAULT_DIR_MODE; - this.linkFlag = LF_DIR; - - int nameLength = normalizedName.length(); - if (nameLength == 0 || normalizedName.charAt(nameLength - 1) != '/') { - this.name = normalizedName + "/"; - } else { - this.name = normalizedName; - } - this.size = 0; - } else { - this.mode = DEFAULT_FILE_MODE; - this.linkFlag = LF_NORMAL; - this.size = file.length(); - this.name = normalizedName; - } - - 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. - * @throws IllegalArgumentException if any of the numeric fields have an invalid format - */ - public TarEntry(byte[] headerBuf) { - this(); - parseTarHeader(headerBuf); - } - - /** - * Construct an entry from an archive's header bytes. File is set - * to null. - * - * @param headerBuf The header bytes from a tar archive entry. - * @param encoding encoding to use for file names - * @throws IllegalArgumentException if any of the numeric fields have an invalid format - * @throws IOException if an error occurs during reading the archive - */ - public TarEntry(byte[] headerBuf, ZipEncoding encoding) - throws IOException { - this(); - parseTarHeader(headerBuf, encoding); - } - - /** - * 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. - */ - public boolean equals(TarEntry it) { - return getName().equals(it.getName()); - } - - /** - * 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(Object it) { - if (it == null || getClass() != it.getClass()) { - return false; - } - return equals((TarEntry) it); - } - - /** - * 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 descendant of this. - * @return True if entry is a descendant of this. - */ - public boolean isDescendent(TarEntry desc) { - return desc.getName().startsWith(getName()); - } - - /** - * Get this entry's name. - * - * @return This entry's name. - */ - public String getName() { - return name.toString(); - } - - /** - * Set this entry's name. - * - * @param name This entry's new name. - */ - public void setName(String name) { - this.name = normalizeFileName(name, false); - } - - /** - * Set the mode for this entry - * - * @param mode the mode for this entry - */ - public void setMode(int mode) { - this.mode = mode; - } - - /** - * Get this entry's link name. - * - * @return This entry's link name. - */ - public String getLinkName() { - return linkName.toString(); - } - - /** - * Set this entry's link name. - * - * @param link the link name to use. - */ - public void setLinkName(String link) { - this.linkName = link; - } - - /** - * Get this entry's user id. - * - * @return This entry's user id. - * @deprecated use #getLongUserId instead as user ids can be - * bigger than {@link Integer#MAX_VALUE} - */ - @Deprecated - public int getUserId() { - return (int) (userId & 0xffffffff); - } - - /** - * Set this entry's user id. - * - * @param userId This entry's new user id. - */ - public void setUserId(int userId) { - setUserId((long) userId); - } - - /** - * Get this entry's user id. - * - * @return This entry's user id. - * @since 1.9.5 - */ - public long getLongUserId() { - return userId; - } - - /** - * Set this entry's user id. - * - * @param userId This entry's new user id. - * @since 1.9.5 - */ - public void setUserId(long userId) { - this.userId = userId; - } - - /** - * Get this entry's group id. - * - * @return This entry's group id. - * @deprecated use #getLongGroupId instead as group ids can be - * bigger than {@link Integer#MAX_VALUE} - */ - @Deprecated - public int getGroupId() { - return (int) (groupId & 0xffffffff); - } - - /** - * Set this entry's group id. - * - * @param groupId This entry's new group id. - */ - public void setGroupId(int groupId) { - setGroupId((long) groupId); - } - - /** - * Get this entry's group id. - * - * @return This entry's group id. - * @since 1.9.5 - */ - public long getLongGroupId() { - return groupId; - } - - /** - * Set this entry's group id. - * - * @param groupId This entry's new group id. - * @since 1.9.5 - */ - public void setGroupId(long groupId) { - this.groupId = groupId; - } - - /** - * Get this entry's user name. - * - * @return This entry's user name. - */ - public String getUserName() { - return userName.toString(); - } - - /** - * Set this entry's user name. - * - * @param userName This entry's new user name. - */ - public void setUserName(String userName) { - this.userName = userName; - } - - /** - * Get this entry's group name. - * - * @return This entry's group name. - */ - public String getGroupName() { - return groupName.toString(); - } - - /** - * Set this entry's group name. - * - * @param groupName This entry's new group name. - */ - public void setGroupName(String groupName) { - this.groupName = 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(int userId, 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(String userName, 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(long time) { - modTime = time / MILLIS_PER_SECOND; - } - - /** - * Set this entry's modification time. - * - * @param time This entry's new modification time. - */ - public void setModTime(Date time) { - 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(modTime * MILLIS_PER_SECOND); - } - - /** - * Get this entry's file. - * - * @return This entry's file. - */ - public File getFile() { - return file; - } - - /** - * Get this entry's mode. - * - * @return This entry's mode. - */ - public int getMode() { - return mode; - } - - /** - * Get this entry's file size. - * - * @return This entry's file size. - */ - public long getSize() { - return size; - } - - /** - * Set this entry's file size. - * - * @param size This entry's new file size. - * @throws IllegalArgumentException if the size is < 0. - */ - public void setSize(long size) { - if (size < 0) { - throw new IllegalArgumentException("Size is out of range: " + size); - } - this.size = size; - } - - /** - * Get this entry's major device number. - * - * @return This entry's major device number. - */ - public int getDevMajor() { - return devMajor; - } - - /** - * Set this entry's major device number. - * - * @param devNo This entry's major device number. - * @throws IllegalArgumentException if the devNo is < 0. - */ - public void setDevMajor(int devNo) { - if (devNo < 0) { - throw new IllegalArgumentException("Major device number is out of " - + "range: " + devNo); - } - this.devMajor = devNo; - } - - /** - * Get this entry's minor device number. - * - * @return This entry's minor device number. - */ - public int getDevMinor() { - return devMinor; - } - - /** - * Set this entry's minor device number. - * - * @param devNo This entry's minor device number. - * @throws IllegalArgumentException if the devNo is < 0. - */ - public void setDevMinor(int devNo) { - if (devNo < 0) { - throw new IllegalArgumentException("Minor device number is out of " - + "range: " + devNo); - } - this.devMinor = devNo; - } - - /** - * Indicates in case of a sparse file if an extension sparse header - * follows. - * - * @return true if an extension sparse header follows. - */ - public boolean isExtended() { - return isExtended; - } - - /** - * Get this entry's real file size in case of a sparse file. - * - * @return This entry's real file size. - */ - public long getRealSize() { - return realSize; - } - - /** - * Indicate if this entry is a GNU sparse block. - * - * @return true if this is a sparse extension provided by GNU tar - */ - public boolean isGNUSparse() { - return linkFlag == LF_GNUTYPE_SPARSE; - } - - /** - * Indicate if this entry is a GNU long linkname block - * - * @return true if this is a long name extension provided by GNU tar - */ - public boolean isGNULongLinkEntry() { - return linkFlag == LF_GNUTYPE_LONGLINK - && name.equals(GNU_LONGLINK); - } - - /** - * 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 linkFlag == LF_GNUTYPE_LONGNAME - && name.equals(GNU_LONGLINK); - } - - /** - * Check if this is a Pax header. - * - * @return {@code true} if this is a Pax header. - */ - public boolean isPaxHeader() { - return linkFlag == LF_PAX_EXTENDED_HEADER_LC - || linkFlag == LF_PAX_EXTENDED_HEADER_UC; - } - - /** - * Check if this is a Pax header. - * - * @return {@code true} if this is a Pax header. - */ - public boolean isGlobalPaxHeader() { - return linkFlag == LF_PAX_GLOBAL_EXTENDED_HEADER; - } - - /** - * Return whether or not this entry represents a directory. - * - * @return True if this entry is a directory. - */ - public boolean isDirectory() { - if (file != null) { - return file.isDirectory(); - } - - if (linkFlag == LF_DIR) { - return true; - } - - if (getName().endsWith("/")) { - return true; - } - - return false; - } - - /** - * Check if this is a "normal file". - * @return <i>true</i> if it is a 'normal' file - */ - public boolean isFile() { - if (file != null) { - return file.isFile(); - } - if (linkFlag == LF_OLDNORM || linkFlag == LF_NORMAL) { - return true; - } - return !getName().endsWith("/"); - } - - /** - * Check if this is a symbolic link entry. - * @return <i>true</i> if it is a symlink - */ - public boolean isSymbolicLink() { - return linkFlag == LF_SYMLINK; - } - - /** - * Check if this is a link entry. - * @return <i>true</i> if it is a link - */ - public boolean isLink() { - return linkFlag == LF_LINK; - } - - /** - * Check if this is a character device entry. - * @return <i>true</i> if it is a character device entry - */ - public boolean isCharacterDevice() { - return linkFlag == LF_CHR; - } - - /** - * @return <i>true</i> if this is a block device entry. - */ - public boolean isBlockDevice() { - return linkFlag == LF_BLK; - } - - /** - * @return <i>true</i> if this is a FIFO (pipe) entry. - */ - public boolean isFIFO() { - return linkFlag == LF_FIFO; - } - - /** - * 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 (file == null || !file.isDirectory()) { - return new TarEntry[0]; - } - - String[] list = file.list(); - TarEntry[] result = new TarEntry[list.length]; - - for (int i = 0; i < list.length; ++i) { - result[i] = new TarEntry(new File(file, list[i])); - } - - return result; - } - - /** - * Write an entry's header information to a header buffer. - * - * <p>This method does not use the star/GNU tar/BSD tar extensions.</p> - * - * @param outbuf The tar entry header buffer to fill in. - */ - public void writeEntryHeader(byte[] outbuf) { - try { - writeEntryHeader(outbuf, TarUtils.DEFAULT_ENCODING, false); - } catch (IOException ex) { - try { - writeEntryHeader(outbuf, TarUtils.FALLBACK_ENCODING, false); - } catch (IOException ex2) { - // impossible - throw new RuntimeException(ex2); - } - } - } - - /** - * Write an entry's header information to a header buffer. - * - * @param outbuf The tar entry header buffer to fill in. - * @param encoding encoding to use when writing the file name. - * @param starMode whether to use the star/GNU tar/BSD tar - * extension for numeric fields if their value doesn't fit in the - * maximum size of standard tar archives - * @throws IOException if an error occurs while writing the archive - */ - public void writeEntryHeader(byte[] outbuf, ZipEncoding encoding, - boolean starMode) throws IOException { - int offset = 0; - - offset = TarUtils.formatNameBytes(name, outbuf, offset, NAMELEN, - encoding); - offset = writeEntryHeaderField(mode, outbuf, offset, MODELEN, starMode); - offset = writeEntryHeaderField(userId, outbuf, offset, UIDLEN, - starMode); - offset = writeEntryHeaderField(groupId, outbuf, offset, GIDLEN, - starMode); - offset = writeEntryHeaderField(size, outbuf, offset, SIZELEN, starMode); - offset = writeEntryHeaderField(modTime, outbuf, offset, MODTIMELEN, - starMode); - - int csOffset = offset; - - for (int c = 0; c < CHKSUMLEN; ++c) { - outbuf[offset++] = (byte) ' '; - } - - outbuf[offset++] = linkFlag; - offset = TarUtils.formatNameBytes(linkName, outbuf, offset, NAMELEN, - encoding); - offset = TarUtils.formatNameBytes(magic, outbuf, offset, PURE_MAGICLEN); - offset = TarUtils.formatNameBytes(version, outbuf, offset, VERSIONLEN); - offset = TarUtils.formatNameBytes(userName, outbuf, offset, UNAMELEN, - encoding); - offset = TarUtils.formatNameBytes(groupName, outbuf, offset, GNAMELEN, - encoding); - offset = writeEntryHeaderField(devMajor, outbuf, offset, DEVLEN, - starMode); - offset = writeEntryHeaderField(devMinor, outbuf, offset, DEVLEN, - starMode); - - while (offset < outbuf.length) { - outbuf[offset++] = 0; - } - - long chk = TarUtils.computeCheckSum(outbuf); - - TarUtils.formatCheckSumOctalBytes(chk, outbuf, csOffset, CHKSUMLEN); - } - - private int writeEntryHeaderField(long value, byte[] outbuf, int offset, - int length, boolean starMode) { - if (!starMode && (value < 0 - || value >= (1L << (3 * (length - 1))))) { - // value doesn't fit into field when written as octal - // number, will be written to PAX header or causes an - // error - return TarUtils.formatLongOctalBytes(0, outbuf, offset, length); - } - return TarUtils.formatLongOctalOrBinaryBytes(value, outbuf, offset, - length); - } - - /** - * Parse an entry's header information from a header buffer. - * - * @param header The tar entry header buffer to get information from. - * @throws IllegalArgumentException if any of the numeric fields have an invalid format - */ - public void parseTarHeader(byte[] header) { - try { - parseTarHeader(header, TarUtils.DEFAULT_ENCODING); - } catch (IOException ex) { - try { - parseTarHeader(header, TarUtils.DEFAULT_ENCODING, true); - } catch (IOException ex2) { - // not really possible - throw new RuntimeException(ex2); - } - } - } - - /** - * Parse an entry's header information from a header buffer. - * - * @param header The tar entry header buffer to get information from. - * @param encoding encoding to use for file names - * @throws IllegalArgumentException if any of the numeric fields - * have an invalid format - * @throws IOException if an error occurs while reading the archive - */ - public void parseTarHeader(byte[] header, ZipEncoding encoding) - throws IOException { - parseTarHeader(header, encoding, false); - } - - private void parseTarHeader(byte[] header, ZipEncoding encoding, - final boolean oldStyle) - throws IOException { - int offset = 0; - - name = oldStyle ? TarUtils.parseName(header, offset, NAMELEN) - : TarUtils.parseName(header, offset, NAMELEN, encoding); - offset += NAMELEN; - mode = (int) TarUtils.parseOctalOrBinary(header, offset, MODELEN); - offset += MODELEN; - userId = (int) TarUtils.parseOctalOrBinary(header, offset, UIDLEN); - offset += UIDLEN; - groupId = (int) TarUtils.parseOctalOrBinary(header, offset, GIDLEN); - offset += GIDLEN; - size = TarUtils.parseOctalOrBinary(header, offset, SIZELEN); - offset += SIZELEN; - modTime = TarUtils.parseOctalOrBinary(header, offset, MODTIMELEN); - offset += MODTIMELEN; - offset += CHKSUMLEN; - linkFlag = header[offset++]; - linkName = oldStyle ? TarUtils.parseName(header, offset, NAMELEN) - : TarUtils.parseName(header, offset, NAMELEN, encoding); - offset += NAMELEN; - magic = TarUtils.parseName(header, offset, PURE_MAGICLEN); - offset += PURE_MAGICLEN; - version = TarUtils.parseName(header, offset, VERSIONLEN); - offset += VERSIONLEN; - userName = oldStyle ? TarUtils.parseName(header, offset, UNAMELEN) - : TarUtils.parseName(header, offset, UNAMELEN, encoding); - offset += UNAMELEN; - groupName = oldStyle ? TarUtils.parseName(header, offset, GNAMELEN) - : TarUtils.parseName(header, offset, GNAMELEN, encoding); - offset += GNAMELEN; - devMajor = (int) TarUtils.parseOctalOrBinary(header, offset, DEVLEN); - offset += DEVLEN; - devMinor = (int) TarUtils.parseOctalOrBinary(header, offset, DEVLEN); - offset += DEVLEN; - - int type = evaluateType(header); - switch (type) { - case FORMAT_OLDGNU: { - offset += ATIMELEN_GNU; - offset += CTIMELEN_GNU; - offset += OFFSETLEN_GNU; - offset += LONGNAMESLEN_GNU; - offset += PAD2LEN_GNU; - offset += SPARSELEN_GNU; - isExtended = TarUtils.parseBoolean(header, offset); - offset += ISEXTENDEDLEN_GNU; - realSize = TarUtils.parseOctal(header, offset, REALSIZELEN_GNU); - offset += REALSIZELEN_GNU; - break; - } - case FORMAT_POSIX: - default: { - String prefix = oldStyle - ? TarUtils.parseName(header, offset, PREFIXLEN) - : TarUtils.parseName(header, offset, PREFIXLEN, encoding); - // SunOS tar -E does not add / to directory names, so fix - // up to be consistent - if (isDirectory() && !name.endsWith("/")) { - name = name + "/"; - } - if (prefix.length() > 0) { - name = prefix + "/" + name; - } - } - } - } - - /** - * Strips Windows' drive letter as well as any leading slashes, - * turns path separators into forward slahes. - */ - private static String normalizeFileName(String fileName, - boolean preserveLeadingSlashes) { - String osname = System.getProperty("os.name").toLowerCase(Locale.ENGLISH); - - if (osname != null) { - - // Strip off drive letters! - // REVIEW Would a better check be "(File.separator == '\')"? - - if (osname.startsWith("windows")) { - if (fileName.length() > 2) { - char ch1 = fileName.charAt(0); - char ch2 = fileName.charAt(1); - - if (ch2 == ':' - && ((ch1 >= 'a' && ch1 <= 'z') - || (ch1 >= 'A' && ch1 <= 'Z'))) { - fileName = fileName.substring(2); - } - } - } else if (osname.indexOf("netware") > -1) { - 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 (!preserveLeadingSlashes && fileName.startsWith("/")) { - fileName = fileName.substring(1); - } - return fileName; - } - - /** - * Evaluate an entry's header format from a header buffer. - * - * @param header The tar entry header buffer to evaluate the format for. - * @return format type - */ - private int evaluateType(byte[] header) { - if (matchAsciiBuffer(GNU_TMAGIC, header, MAGIC_OFFSET, PURE_MAGICLEN)) { - return FORMAT_OLDGNU; - } - if (matchAsciiBuffer(MAGIC_POSIX, header, MAGIC_OFFSET, PURE_MAGICLEN)) { - return FORMAT_POSIX; - } - return 0; - } - - /** - * Check if buffer contents matches Ascii String. - * - * @param expected - * @param buffer - * @param offset - * @param length - * @return {@code true} if buffer is the same as the expected string - */ - private static boolean matchAsciiBuffer(String expected, byte[] buffer, - int offset, int length) { - byte[] buffer1; - try { - buffer1 = expected.getBytes("ASCII"); - } catch (UnsupportedEncodingException e) { - throw new RuntimeException(e); // Should not happen - } - return isEqual(buffer1, 0, buffer1.length, buffer, offset, length, - false); - } - - /** - * Compare byte buffers, optionally ignoring trailing nulls - * - * @param buffer1 - * @param offset1 - * @param length1 - * @param buffer2 - * @param offset2 - * @param length2 - * @param ignoreTrailingNulls - * @return {@code true} if buffer1 and buffer2 have same contents, having regard to trailing nulls - */ - private static boolean isEqual( - final byte[] buffer1, final int offset1, final int length1, - final byte[] buffer2, final int offset2, final int length2, - boolean ignoreTrailingNulls) { - int minLen=length1 < length2 ? length1 : length2; - for (int i=0; i < minLen; i++) { - if (buffer1[offset1+i] != buffer2[offset2+i]) { - return false; - } - } - if (length1 == length2) { - return true; - } - if (ignoreTrailingNulls) { - if (length1 > length2){ - for(int i = length2; i < length1; i++){ - if (buffer1[offset1+i] != 0) { - return false; - } - } - } else { - for (int i = length1; i < length2; i++){ - if (buffer2[offset2+i] != 0) { - return false; - } - } - } - return true; - } - return false; - } -} |