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1// -*- mode: cpp; mode: fold -*-
2// Description /*{{{*/
3// $Id: multicompress.h,v 1.2 2001/02/20 07:03:18 jgg Exp $
4/* ######################################################################
5
6 MultiCompressor
7
8 Multiple output class. Takes a single FILE* and writes it simultaneously
9 to many compressed files. Then checks if the resulting output is
10 different from any previous output and overwrites the old files. Care is
11 taken to ensure that the new files are not generally readable while they
12 are being written.
13
14 ##################################################################### */
15 /*}}}*/
16#ifndef MULTICOMPRESS_H
17#define MULTICOMPRESS_H
18
b2e465d6 19#include <apt-pkg/fileutl.h>
03bef784 20#include <apt-pkg/aptconfiguration.h>
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21
22#include <string>
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23#include <stdio.h>
24#include <sys/types.h>
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25#include <time.h>
26
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27class MultiCompress
28{
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29 // An output file
30 struct Files
31 {
8f3ba4e8 32 std::string Output;
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33 APT::Configuration::Compressor CompressProg;
34 Files *Next;
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35 FileFd TmpFile;
36 pid_t CompressProc;
37 time_t OldMTime;
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38 };
39
40 Files *Outputs;
41 pid_t Outputter;
42 mode_t Permissions;
b2e465d6 43
9209ec47 44 bool Child(int const &Fd);
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45 bool Start();
46 bool Die();
47
48 public:
49
50 // The FD to write to for compression.
88593886 51 FileFd Input;
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52 unsigned long UpdateMTime;
53
650faab0 54 bool Finalize(unsigned long long &OutSize);
12d1f5b3 55 bool OpenOld(FileFd &Fd);
8f3ba4e8 56 static bool GetStat(std::string const &Output,std::string const &Compress,struct stat &St);
b2e465d6 57
8f3ba4e8 58 MultiCompress(std::string const &Output,std::string const &Compress,
9209ec47 59 mode_t const &Permissions, bool const &Write = true);
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60 ~MultiCompress();
61};
62
63#endif