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);
}
/**
* 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
* @since 1.4
*/
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, 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);
}
/**
* Creates a new header for a file/directory entry.
*
* @param name File name
* @param size File size in bytes
* @param modTime Last modification time in numeric Unix time format
* @param dir Is directory
* @return
*/
public static TarHeader createHeader(String entryName, long size, long modTime, boolean dir) {
String name = entryName;
name = TarUtils.trim(name.replace(File.separatorChar, '/'), '/');
TarHeader header = new TarHeader();
header.linkName = new StringBuffer("");
if (name.length() > 100) {
header.namePrefix = new StringBuffer(name.substring(0, name.lastIndexOf('/')));
header.name = new StringBuffer(name.substring(name.lastIndexOf('/') + 1));
} else {
header.name = new StringBuffer(name);
}
if (dir) {
header.mode = 040755;
header.linkFlag = TarHeader.LF_DIR;
if (header.name.charAt(header.name.length() - 1) != '/') {
header.name.append("/");
}
header.size = 0;
} else {
header.mode = 0100644;
header.linkFlag = TarHeader.LF_NORMAL;
header.size = size;
}
header.modTime = modTime;
header.checkSum = 0;
header.devMajor = 0;
header.devMinor = 0;
return header;
}
@Test(
expectedExceptions = IllegalArgumentException.class,
expectedExceptionsMessageRegExp = "Packing item is a directory")
public void testPackDirectoryAsFileException() throws IOException {
TarUtils.compressFile(Paths.get("target"), Paths.get("somePack"));
}
@Test(
expectedExceptions = IllegalArgumentException.class,
expectedExceptionsMessageRegExp = "Packing file doesn't exist")
public void testPackNonExistsFileException() throws IOException {
TarUtils.compressFile(Paths.get("non-exists"), Paths.get("somePack"));
}
/**
* Parse an entry's header information from a header buffer.
*
* @param header The tar entry header buffer to get information from.
*/
public void parseTarHeader(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;
this.checkSum = (int) TarUtils.parseOctal(header, offset, CHKSUMLEN);
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);
}
/**
* Write an entry's header information to a header buffer.
*
* @param outbuf The tar entry header buffer to fill in.
*/
public void writeEntryHeader(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);
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;
}
long checkSum = TarUtils.computeCheckSum(outbuf);
TarUtils.getCheckSumOctalBytes(checkSum, outbuf, csOffset, CHKSUMLEN);
}
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, MAGICLEN);
offset += 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;
}
}
}
}
