/** TarHeaders can be cloned. */
public Object clone() {
TarHeader hdr = null;
try {
hdr = (TarHeader) super.clone();
hdr.name = (this.name == null) ? null : new StringBuffer(this.name.toString());
hdr.mode = this.mode;
hdr.userId = this.userId;
hdr.groupId = this.groupId;
hdr.size = this.size;
hdr.modTime = this.modTime;
hdr.checkSum = this.checkSum;
hdr.linkFlag = this.linkFlag;
hdr.linkName = (this.linkName == null) ? null : new StringBuffer(this.linkName.toString());
hdr.magic = (this.magic == null) ? null : new StringBuffer(this.magic.toString());
hdr.userName = (this.userName == null) ? null : new StringBuffer(this.userName.toString());
hdr.groupName = (this.groupName == null) ? null : new StringBuffer(this.groupName.toString());
hdr.devMajor = this.devMajor;
hdr.devMinor = this.devMinor;
} catch (CloneNotSupportedException ex) {
ex.printStackTrace(System.err);
}
return hdr;
}
/**
* Fill in a TarHeader given only the entry's name.
*
* @param hdr The TarHeader to fill in.
* @param name The tar entry name.
*/
public void nameTarHeader(TarHeader hdr, String name) {
boolean isDir = name.endsWith("/");
this.gnuFormat = false;
this.ustarFormat = true;
this.unixFormat = false;
hdr.checkSum = 0;
hdr.devMajor = 0;
hdr.devMinor = 0;
hdr.name = new StringBuffer(name);
hdr.mode = isDir ? 040755 : 0100644;
hdr.userId = 0;
hdr.groupId = 0;
hdr.size = 0;
hdr.checkSum = 0;
hdr.modTime = (new java.util.Date()).getTime() / 1000;
hdr.linkFlag = isDir ? TarHeader.LF_DIR : TarHeader.LF_NORMAL;
hdr.linkName = new StringBuffer("");
hdr.userName = new StringBuffer("");
hdr.groupName = new StringBuffer("");
hdr.devMajor = 0;
hdr.devMinor = 0;
}
/**
* Parse an entry's TarHeader information from a header buffer.
*
* <p>Old unix-style code contributed by David Mehringer <*****@*****.**>.
*
* @param hdr The TarHeader to fill in from the buffer information.
* @param header The tar entry header buffer to get information from.
*/
public void parseTarHeader(TarHeader hdr, byte[] headerBuf) throws InvalidHeaderException {
int offset = 0;
//
// NOTE Recognize archive header format.
//
if (headerBuf[257] == 0
&& headerBuf[258] == 0
&& headerBuf[259] == 0
&& headerBuf[260] == 0
&& headerBuf[261] == 0) {
this.unixFormat = true;
this.ustarFormat = false;
this.gnuFormat = false;
} else if (headerBuf[257] == 'u'
&& headerBuf[258] == 's'
&& headerBuf[259] == 't'
&& headerBuf[260] == 'a'
&& headerBuf[261] == 'r'
&& headerBuf[262] == 0) {
this.ustarFormat = true;
this.gnuFormat = false;
this.unixFormat = false;
} else if (headerBuf[257] == 'u'
&& headerBuf[258] == 's'
&& headerBuf[259] == 't'
&& headerBuf[260] == 'a'
&& headerBuf[261] == 'r'
&& headerBuf[262] != 0
&& headerBuf[263] != 0) {
// REVIEW
this.gnuFormat = true;
this.unixFormat = false;
this.ustarFormat = false;
} else {
StringBuffer buf = new StringBuffer(128);
buf.append("header magic is not 'ustar' or unix-style zeros, it is '");
buf.append(headerBuf[257]);
buf.append(headerBuf[258]);
buf.append(headerBuf[259]);
buf.append(headerBuf[260]);
buf.append(headerBuf[261]);
buf.append(headerBuf[262]);
buf.append(headerBuf[263]);
buf.append("', or (dec) ");
buf.append((int) headerBuf[257]);
buf.append(", ");
buf.append((int) headerBuf[258]);
buf.append(", ");
buf.append((int) headerBuf[259]);
buf.append(", ");
buf.append((int) headerBuf[260]);
buf.append(", ");
buf.append((int) headerBuf[261]);
buf.append(", ");
buf.append((int) headerBuf[262]);
buf.append(", ");
buf.append((int) headerBuf[263]);
throw new InvalidHeaderException(buf.toString());
}
hdr.name = TarHeader.parseFileName(headerBuf);
offset = TarHeader.NAMELEN;
hdr.mode = (int) TarHeader.parseOctal(headerBuf, offset, TarHeader.MODELEN);
offset += TarHeader.MODELEN;
hdr.userId = (int) TarHeader.parseOctal(headerBuf, offset, TarHeader.UIDLEN);
offset += TarHeader.UIDLEN;
hdr.groupId = (int) TarHeader.parseOctal(headerBuf, offset, TarHeader.GIDLEN);
offset += TarHeader.GIDLEN;
hdr.size = TarHeader.parseOctal(headerBuf, offset, TarHeader.SIZELEN);
offset += TarHeader.SIZELEN;
hdr.modTime = TarHeader.parseOctal(headerBuf, offset, TarHeader.MODTIMELEN);
offset += TarHeader.MODTIMELEN;
hdr.checkSum = (int) TarHeader.parseOctal(headerBuf, offset, TarHeader.CHKSUMLEN);
offset += TarHeader.CHKSUMLEN;
hdr.linkFlag = headerBuf[offset++];
hdr.linkName = TarHeader.parseName(headerBuf, offset, TarHeader.NAMELEN);
offset += TarHeader.NAMELEN;
if (this.ustarFormat) {
hdr.magic = TarHeader.parseName(headerBuf, offset, TarHeader.MAGICLEN);
offset += TarHeader.MAGICLEN;
hdr.userName = TarHeader.parseName(headerBuf, offset, TarHeader.UNAMELEN);
offset += TarHeader.UNAMELEN;
hdr.groupName = TarHeader.parseName(headerBuf, offset, TarHeader.GNAMELEN);
offset += TarHeader.GNAMELEN;
hdr.devMajor = (int) TarHeader.parseOctal(headerBuf, offset, TarHeader.DEVLEN);
offset += TarHeader.DEVLEN;
hdr.devMinor = (int) TarHeader.parseOctal(headerBuf, offset, TarHeader.DEVLEN);
} else {
hdr.devMajor = 0;
hdr.devMinor = 0;
hdr.magic = new StringBuffer("");
hdr.userName = new StringBuffer("");
hdr.groupName = new StringBuffer("");
}
}
/**
* Fill in a TarHeader with information from a File.
*
* @param hdr The TarHeader to fill in.
* @param file The file from which to get the header information.
*/
public void getFileTarHeader(TarHeader hdr, File file) throws InvalidHeaderException {
this.file = file;
String name = file.getPath();
String osname = System.getProperty("os.name");
if (osname != null) {
// Strip off drive letters!
// REVIEW Would a better check be "(File.separator == '\')"?
// String Win32Prefix = "Windows";
// String prefix = osname.substring( 0, Win32Prefix.length() );
// if ( prefix.equalsIgnoreCase( Win32Prefix ) )
// if ( File.separatorChar == '\\' )
// Windows OS check was contributed by
// Patrick Beard <*****@*****.**>
String Win32Prefix = "windows";
if (osname.toLowerCase().startsWith(Win32Prefix)) {
if (name.length() > 2) {
char ch1 = name.charAt(0);
char ch2 = name.charAt(1);
if (ch2 == ':' && ((ch1 >= 'a' && ch1 <= 'z') || (ch1 >= 'A' && ch1 <= 'Z'))) {
name = name.substring(2);
}
}
}
}
name = name.replace(File.separatorChar, '/');
// No absolute pathnames
// Windows (and Posix?) paths can start with "\\NetworkDrive\",
// so we loop on starting /'s.
for (; name.startsWith("/"); ) {
name = name.substring(1);
}
hdr.linkName = new StringBuffer("");
hdr.name = new StringBuffer(name);
if (file.isDirectory()) {
hdr.size = 0;
hdr.mode = 040755;
hdr.linkFlag = TarHeader.LF_DIR;
if (hdr.name.charAt(hdr.name.length() - 1) != '/') {
hdr.name.append("/");
}
} else {
hdr.size = file.length();
hdr.mode = 0100644;
hdr.linkFlag = TarHeader.LF_NORMAL;
}
// UNDONE When File lets us get the userName, use it!
hdr.modTime = file.lastModified() / 1000;
hdr.checkSum = 0;
hdr.devMajor = 0;
hdr.devMinor = 0;
}
