tar.txt

php-4.4.7学习linux时下载的源代码

                string with names separated by a single blank space. 
  $p_add_dir : A string which contains a path to be added to the
               memorized path of each element in the list. 
  $p_remove_dir : A string which contains a path to be removed from
                  the memorized path of each element in the list, when
		  relevant.
Return value :
  true on success, false on error.
Sample 1 :
  $tar_object = new Archive_Tar("tarname.tar");
  [...]
  $v_list[0]="dev/file.txt";
  $v_list[1]="dev/data/"; (Optional '/' at the end)
  $v_list[2]="log/file.log";
  $tar_object->addModify($v_list, "install");
  // files are stored in the archive as :
  //   install/file.txt
  //   install/data
  //   install/data/file1.txt
  //   install/data/... all the files and sub-dirs of data/
  //   install/file.log
Sample 2 :
  $tar_object = new Archive_Tar("tarname.tar");
  [...]
  $v_list[0]="dev/file.txt";
  $v_list[1]="dev/data/"; (Optional '/' at the end)
  $v_list[2]="log/file.log";
  $tar_object->addModify($v_list, "install", "dev");
  // files are stored in the archive as :
  //   install/file.txt
  //   install/data
  //   install/data/file1.txt
  //   install/data/... all the files and sub-dirs of data/
  //   install/log/file.log
How it works :
  If the archive does not exists it create it and add the files.
  If the archive does exists and is not compressed, it open it, jump
  before the last empty 512 bytes block (tar footer) and add the files
  at this point.
  If the archive does exists and is compressed, a temporary copy file
  is created. This temporary file is then 'gzip' read block by block
  until the last empty block. The new files are then added in the
  compressed file.
  The adding of files is done by going through the file/dir list,
  adding files per files, in a recursive way through the
  directory. Each time a path need to be added/removed it is done
  before writing the file header in the archive.

Method : add($p_filelist)
Description :
  This method add the files / directories listed in $p_filelist at the
  end of the existing archive. If the archive does not yet exists it
  is created. 
  The $p_filelist parameter can be an array of string, each string
  representing a filename or a directory name with their path if
  needed. It can also be a single string with names separated by a
  single blank. 
  See addModify() method for details and limitations.
Arguments :
  $p_filelist : An array of filenames and directory names, or a single
  string with names separated by a single blank space. 
Return value :
  true on success, false on error.
Sample 1 :
  $tar_object = new Archive_Tar("tarname.tar");
  [...]
  $v_list[0]="dev/file.txt";
  $v_list[1]="dev/data/"; (Optional '/' at the end)
  $v_list[2]="log/file.log";
  $tar_object->add($v_list);
Sample 2 :
  $tar_object = new Archive_Tar("tarname.tgz", true);
  [...]
  $v_list[0]="dev/file.txt";
  $v_list[1]="dev/data/"; (Optional '/' at the end)
  $v_list[2]="log/file.log";
  $tar_object->add($v_list);
How it works :
  Simply call the addModify() method with the right parameters.

Method : extract($p_path = "")
Description :
  This method extract all the content of the archive in the directory
  indicated by $p_path.If $p_path is optional, if not set the archive
  is extracted in the current directory. 
  While extracting a file, if the directory path does not exists it is
  created. 
  See extractModify() for details and limitations.
Arguments :
  $p_path : Optional path where the files/dir need to by extracted.
Return value :
  true on success, false on error.
Sample :
  $tar_object = new Archive_Tar("tarname.tar");
  $tar_object->extract();
How it works :
  Simply call the extractModify() method with appropriate parameters.

Method : extractModify($p_path, $p_remove_path)
Description :
  This method extract all the content of the archive in the directory
  indicated by $p_path. When relevant the memorized path of the
  files/dir can be modified by removing the $p_remove_path path at the
  beginning of the file/dir path. 
  While extracting a file, if the directory path does not exists it is
  created. 
  While extracting a file, if the file already exists it is replaced
  without looking for last modification date. 
  While extracting a file, if the file already exists and is write
  protected, the extraction is aborted. 
  While extracting a file, if a directory with the same name already
  exists, the extraction is aborted. 
  While extracting a directory, if a file with the same name already
  exists, the extraction is aborted. 
  While extracting a file/directory if the destination directory exist
  and is write protected, or does not exist but can not be created,
  the extraction is aborted. 
  If after extraction an extracted file does not show the correct
  stored file size, the extraction is aborted. 
  When the extraction is aborted, a PEAR error text is set and false
  is returned. However the result can be a partial extraction that may
  need to be manually cleaned. 
Arguments :
  $p_path : The path of the directory where the files/dir need to by
            extracted. 
  $p_remove_path : Part of the memorized path that can be removed if
                   present at the beginning of the file/dir path. 
Return value :
  true on success, false on error.
Sample :
  // Imagine tarname.tar with files :
  //   dev/data/file.txt
  //   dev/data/log.txt
  //   readme.txt
  $tar_object = new Archive_Tar("tarname.tar");
  $tar_object->extractModify("install", "dev");
  // Files will be extracted there :
  //   install/data/file.txt
  //   install/data/log.txt
  //   install/readme.txt
How it works :
  Open the archive and call a more generic function that can extract
  only a part of the archive or all the archive. 
  See extractList() method for more details.

Method : listContent()
Description :
  This method returns an array of arrays that describe each
  file/directory present in the archive. 
  The array is not sorted, so it show the position of the file in the
  archive. 
  The file informations are :
    $file[filename] : Name and path of the file/dir.
    $file[mode] : File permissions (result of fileperms())
    $file[uid] : user id
    $file[gid] : group id
    $file[size] : filesize
    $file[mtime] : Last modification time (result of filemtime())
    $file[typeflag] : "" for file, "5" for directory
Arguments :
Return value :
  An array of arrays or 0 on error.
Sample :
  $tar_object = new Archive_Tar("tarname.tar");
  if (($v_list  =  $tar_object->listContent()) != 0)
    for ($i=0; $i<sizeof($v_list); $i++)
    {
      echo "Filename :'".$v_list[$i][filename]."'<br>";
      echo " .size :'".$v_list[$i][size]."'<br>";
      echo " .mtime :'".$v_list[$i][mtime]."' (".
           date("l dS of F Y h:i:s A", $v_list[$i][mtime]).")<br>";
      echo " .mode :'".$v_list[$i][mode]."'<br>";
      echo " .uid :'".$v_list[$i][uid]."'<br>";
      echo " .gid :'".$v_list[$i][gid]."'<br>";
      echo " .typeflag :'".$v_list[$i][typeflag]."'<br>";
    }
How it works :
  Call the same function as an extract however with a flag to only go
  through the archive without extracting the files. 

Method : extractList($p_filelist, $p_path = "", $p_remove_path = "")
Description :
  This method extract from the archive only the files indicated in the
  $p_filelist. These files are extracted in the current directory or
  in the directory indicated by the optional $p_path parameter. 
  If indicated the $p_remove_path can be used in the same way as it is
  used in extractModify() method. 
Arguments :
  $p_filelist : An array of filenames and directory names, or a single
                string with names separated by a single blank space. 
  $p_path : The path of the directory where the files/dir need to by
            extracted. 
  $p_remove_path : Part of the memorized path that can be removed if
                   present at the beginning of the file/dir path. 
Return value :
  true on success, false on error.
Sample :
  // Imagine tarname.tar with files :
  //   dev/data/file.txt
  //   dev/data/log.txt
  //   readme.txt
  $tar_object = new Archive_Tar("tarname.tar");
  $tar_object->extractList("dev/data/file.txt readme.txt", "install",
                           "dev");
  // Files will be extracted there :
  //   install/data/file.txt
  //   install/readme.txt
How it works :
  Go through the archive and extract only the files present in the
  list.