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 #ifdef __GNUG__
  18 #pragma interface "apt-pkg/extracttar.h"
  19 #endif
  20
  21 #include <apt-pkg/fileutl.h>
  22 #include <apt-pkg/dirstream.h>
  23
  24 #include <algorithm>
  25
  26 using std::min;
  27
  28 class ExtractTar
  29 {
  30    protected:
  31
  32    struct TarHeader;
  33
  34    // The varios types items can be
  35    enum ItemType {NormalFile0 = '\0',NormalFile = '0',HardLink = '1',
  36                   SymbolicLink = '2',CharacterDevice = '3',
  37                   BlockDevice = '4',Directory = '5',FIFO = '6',
  38                   GNU_LongLink = 'K',GNU_LongName = 'L'};
  39
  40    FileFd &File;
  41    unsigned long MaxInSize;
  42    int GZPid;
  43    FileFd InFd;
  44    bool Eof;
  45    string DecompressProg;
  46
  47    // Fork and reap gzip
  48    bool StartGzip();
  49    bool Done(bool Force);
  50
  51    public:
  52
  53    bool Go(pkgDirStream &Stream);
  54
  55    ExtractTar(FileFd &Fd,unsigned long Max,string DecompressionProgram);
  56    virtual ~ExtractTar();
  57 };
  58
  59 #endif