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