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/macros.h>
  19
  20 #include <string>
  21
  22 #ifndef APT_8_CLEANER_HEADERS
  23 #include <apt-pkg/dirstream.h>
  24 #include <algorithm>
  25 using std::min;
  26 #endif
  27
  28 class pkgDirStream;
  29
  30 class ExtractTar
  31 {
  32    protected:
  33
  34    struct TarHeader;
  35
  36    // The varios types items can be
  37    enum ItemType {NormalFile0 = '\0',NormalFile = '0',HardLink = '1',
  38                   SymbolicLink = '2',CharacterDevice = '3',
  39                   BlockDevice = '4',Directory = '5',FIFO = '6',
  40                   GNU_LongLink = 'K',GNU_LongName = 'L'};
  41
  42    FileFd &File;
  43    unsigned long long MaxInSize;
  44    int GZPid;
  45    FileFd InFd;
  46    bool Eof;
  47    std::string DecompressProg;
  48
  49    // Fork and reap gzip
  50    bool StartGzip();
  51    bool Done(bool Force);
  52
  53    public:
  54
  55    bool Go(pkgDirStream &Stream);
  56
  57    ExtractTar(FileFd &Fd,unsigned long long Max,std::string DecompressionProgram);
  58    virtual ~ExtractTar();
  59 };
  60
  61 #endif