62 lines
1.5 KiB
C++
62 lines
1.5 KiB
C++
// -*- mode: cpp; mode: fold -*-
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// Description /*{{{*/
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/* ######################################################################
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MultiCompressor
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Multiple output class. Takes a single FILE* and writes it simultaneously
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to many compressed files. Then checks if the resulting output is
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different from any previous output and overwrites the old files. Care is
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taken to ensure that the new files are not generally readable while they
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are being written.
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##################################################################### */
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/*}}}*/
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#ifndef MULTICOMPRESS_H
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#define MULTICOMPRESS_H
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#include <apt-pkg/aptconfiguration.h>
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#include <apt-pkg/fileutl.h>
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#include <cstdio>
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#include <ctime>
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#include <string>
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#include <sys/types.h>
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class MultiCompress
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{
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// An output file
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struct Files
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{
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std::string Output;
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APT::Configuration::Compressor CompressProg;
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Files *Next;
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FileFd TmpFile;
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pid_t CompressProc;
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time_t OldMTime;
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};
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Files *Outputs;
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pid_t Outputter;
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mode_t Permissions;
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bool Child(int const &Fd);
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bool Start();
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bool Die();
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public:
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// The FD to write to for compression.
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FileFd Input;
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unsigned long UpdateMTime;
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bool Finalize(unsigned long long &OutSize);
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bool OpenOld(FileFd &Fd);
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static bool GetStat(std::string const &Output,std::string const &Compress,struct stat &St);
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MultiCompress(std::string const &Output,std::string const &Compress,
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mode_t const &Permissions, bool const &Write = true);
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~MultiCompress();
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};
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#endif
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