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