apt-inst/contrib/extracttar.h

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: extracttar.h,v 1.2 2001/02/20 07:03:17 jgg Exp $
   4 /* ######################################################################
   5
   6    Extract a Tar - Tar Extractor
   7
   8    The tar extractor takes an ordinary gzip compressed tar stream from
   9    the given file and explodes it, passing the individual items to the
  10    given Directory Stream for processing.
  11
  12    ##################################################################### */
  13                                                                         /*}}}*/
  14 #ifndef PKGLIB_EXTRACTTAR_H
  15 #define PKGLIB_EXTRACTTAR_H
  16
  17 #include <apt-pkg/fileutl.h>
  18
  19 #include <string>
  20
  21 #ifndef APT_8_CLEANER_HEADERS
  22 using std::min;
  23 #endif
  24
  25 class pkgDirStream;
  26
  27 class ExtractTar
  28 {
  29    protected:
  30
  31    struct TarHeader;
  32
  33    // The varios types items can be
  34    enum ItemType {NormalFile0 = '\0',NormalFile = '0',HardLink = '1',
  35                   SymbolicLink = '2',CharacterDevice = '3',
  36                   BlockDevice = '4',Directory = '5',FIFO = '6',
  37                   GNU_LongLink = 'K',GNU_LongName = 'L'};
  38
  39    FileFd &File;
  40    unsigned long MaxInSize;
  41    int GZPid;
  42    FileFd InFd;
  43    bool Eof;
  44    std::string DecompressProg;
  45
  46    // Fork and reap gzip
  47    bool StartGzip();
  48    bool Done(bool Force);
  49
  50    public:
  51
  52    bool Go(pkgDirStream &Stream);
  53
  54    ExtractTar(FileFd &Fd,unsigned long Max,std::string DecompressionProgram);
  55    virtual ~ExtractTar();
  56 };
  57
  58 #endif