/**
* Returns an array with pax header information.
*
* This method reads an extended set of data from the ezcArchiveBlockFile
* $file and returns the values in an array.
*
* @param ezcArchiveBlockFile $file
* @return array(string=>string)
*/
protected function getPaxDecodedHeader(ezcArchiveBlockFile $file)
{
$result = array();
// next block has the info.
$file->next();
$data = $file->current();
$offset = 0;
while (strcmp($data[$offset], "") != 0) {
$space = strpos($data, " ", $offset);
$length = substr($data, $offset, $space - $offset);
$equalSign = strpos($data, "=", $space);
$keyword = substr($data, $space + 1, $equalSign - $space - 1);
$value = rtrim(substr($data, $equalSign + 1, $length - $equalSign - 1), "\n");
$result[$keyword] = $value;
$offset += $length;
}
return $result;
}
/**
* Reads an extended set of data from the Block file and returns it as a string.
*
* Some filenames or link names do not fit in the Ustar header, and are therefor placed in a new block.
* This method read the block(s) and returns the data as a string.
*
* @param ezcArchiveBlockFile $file
* @return string
*/
protected function readExtension(ezcArchiveBlockFile $file)
{
$completeBlocks = (int) ($this->fileSize / self::BLOCK_SIZE);
$rest = $this->fileSize % self::BLOCK_SIZE;
$data = "";
for ($i = 0; $i < $completeBlocks; $i++) {
$data .= $file->next();
}
$data .= substr($file->next(), 0, $rest);
$file->next();
return $data;
}
/**
* Serializes this header and appends it to the given ezcArchiveBlockFile $archiveFile.
*
* @param ezcArchiveBlockFile $archiveFile
* @return void
*/
public function writeEncodedHeader(ezcArchiveBlockFile $archiveFile)
{
// Offset | Field size | Description
// ----------------------------------
// 0 | 100 | Name of file
// 100 | 8 | File mode
// 108 | 8 | Owner user ID
// 116 | 8 | Owner group ID
// 124 | 12 | Length of file in bytes
// 136 | 12 | Modify time of file
// 148 | 8 | Checksum for header
// 156 | 1 | Type flag.
// 157 | 100 | Name of linked file
// 257 | 6 | USTAR indicator.
// 263 | 2 | USTAR version.
// 265 | 32 | Owner user name.
// 297 | 32 | Owner group name.
// 329 | 8 | Major device number.
// 337 | 8 | Minor device number.
// 345 | 155 | Filename prefix.
// 500 | 12 | NUL.
if (ezcBaseFeatures::hasFunction('posix_getpwuid')) {
$posixName = posix_getpwuid($this->userId);
$posixGroup = posix_getgrgid($this->groupId);
} else {
$posixName['name'] = 'nobody';
$posixGroup['name'] = 'nogroup';
}
$enc = pack("a100a8a8a8a12a12a8a1a100a6a2a32a32a8a8a155a12", $this->fileName, str_pad($this->fileMode, 7, "0", STR_PAD_LEFT), str_pad(decoct($this->userId), 7, "0", STR_PAD_LEFT), str_pad(decoct($this->groupId), 7, "0", STR_PAD_LEFT), str_pad(decoct($this->fileSize), 11, "0", STR_PAD_LEFT), str_pad(decoct($this->modificationTime), 11, "0", STR_PAD_LEFT), " ", $this->type, $this->linkName, "ustar", "00", $posixName["name"], $posixGroup["name"], sprintf("%07s", decoct($this->deviceMajorNumber)), sprintf("%07s", decoct($this->deviceMinorNumber)), $this->filePrefix, "");
$enc = $this->setChecksum($enc);
$archiveFile->append($enc);
}
public function testCompressedStream()
{
$dir = $this->createTempDir("ezcArchive_");
// $file = $dir . "/blockfile";
$file = "compress.zlib://" . $dir . "/blockfile";
// Create the file.
// Blocksize = 4.
$bf = new ezcArchiveBlockFile($file, true, 4);
$this->assertFalse($bf->valid());
// Exact 1 block.
$bf->append("abcd");
$this->assertTrue($bf->valid());
$this->assertEquals(0, $bf->key(), "Current block should be 0");
$this->assertEquals(0, $bf->getLastBlockNumber(), "Last block should be 0");
// halve block.
$bf->append("ef");
$this->assertEquals(1, $bf->key(), "Current block should be 1");
$this->assertEquals(1, $bf->getLastBlockNumber(), "Last block should be 1");
// File should contain: abcdef\0\0
$this->assertEquals("abcdef", file_get_contents($file));
$bf->rewind();
$this->assertEquals(0, $bf->key(), "Current block should be 0");
$this->assertEquals("abcd", $bf->current());
$this->assertTrue($bf->valid());
$this->assertEquals(1, $bf->getLastBlockNumber());
try {
$bf->append("ZZ");
$this->fail("Expected an exception that the block could not be appended in the middle");
} catch (ezcArchiveException $e) {
}
$bf->next();
$bf->append("ZZ");
$this->assertEquals(2, $bf->key(), "Current block should be 0");
$this->assertEquals("ZZ", $bf->current());
$this->assertTrue($bf->valid());
$this->assertEquals(2, $bf->getLastBlockNumber());
}
public function testTruncateAmountOfBlocks()
{
if (!$this->canWrite) {
return;
}
$blockFile = new ezcArchiveBlockFile($this->file);
$i = 1;
while ($blockFile->next()) {
$i++;
}
$this->assertEquals(20, $i, "Expected 20 blocks in the file.");
$blockFile->seek(2);
$this->assertFalse($blockFile->isNullBlock(), "Didn't expect a null block.");
$blockFile->seek(3);
$this->assertFalse($blockFile->isNullBlock(), "Didn't expect a null block.");
$blockFile->seek(4);
$this->assertTrue($blockFile->isNullBlock(), "Expected a null block.");
// Give the block File to the archive.
$archive = new ezcArchiveV7Tar($blockFile);
$entry = $archive->current();
// A non rewinded block file, does that work?
$this->assertEquals("file1.txt", $entry->getPath());
$archive->truncate(1);
// keep the first file.
$archive->close();
$blockFile = new ezcArchiveBlockFile($this->file);
// Should be 20 blocks..
$i = 1;
while ($blockFile->next()) {
$i++;
}
$this->assertEquals(20, $i, "Expected 20 blocks in the file.");
$blockFile->seek(0);
$this->assertFalse($blockFile->isNullBlock(), "Didn't expect a null block.");
$blockFile->seek(1);
$this->assertFalse($blockFile->isNullBlock(), "Didn't expect a null block.");
$blockFile->seek(2);
$this->assertTrue($blockFile->isNullBlock(), "Expected a null block.");
unset($blockFile);
}
/**
* Serializes this header and appends it to the given ezcArchiveBlockFile $archiveFile.
*
* @param ezcArchiveBlockFile $archiveFile
* @return void
*/
public function writeEncodedHeader(ezcArchiveBlockFile $archiveFile)
{
// Offset | Field size | Description
// ----------------------------------
// 0 | 100 | Name of file
// 100 | 8 | File mode
// 108 | 8 | Owner user ID
// 116 | 8 | Owner group ID
// 124 | 12 | Length of file in bytes
// 136 | 12 | Modify time of file
// 148 | 8 | Checksum for header
// 156 | 1 | Indicator for links
// 157 | 100 | Name of linked file
// ------------------------------------------
// 257 | 72 | NUL.
// 329 | 8 | Compatibility with GNU tar: Major device set to: 00000000.
// 337 | 8 | Compatibility with GNU tar: Minor device set to: 00000000.
// 345 | 167 | NUL.
//
$enc = pack("a100a8a8a8a12a12a8a1a100a72a8a8a167", $this->fileName, str_pad($this->fileMode, 7, "0", STR_PAD_LEFT), str_pad(decoct($this->userId), 7, "0", STR_PAD_LEFT), str_pad(decoct($this->groupId), 7, "0", STR_PAD_LEFT), str_pad(decoct($this->fileSize), 11, "0", STR_PAD_LEFT), str_pad(decoct($this->modificationTime), 11, "0", STR_PAD_LEFT), " ", $this->type, $this->linkName, "", "0000000", "0000000", "");
$enc = $this->setChecksum($enc);
$archiveFile->append($enc);
}
