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Backup savestates before overwriting

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This commit is contained in:
Ilari Liusvaara 2011-09-18 12:55:34 +03:00
parent 89d511f321
commit 3ad61393dc
1 changed files with 3 additions and 1 deletions
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4
generic/zip.cpp
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@ -438,10 +438,12 @@ void zip_writer::commit() throw(std::bad_alloc, std::logic_error, std::runtime_e
if(!zipstream)
throw std::runtime_error("Failed to write central directory end marker to output file");
zipstream.close();
std::string backup = zipfile_path + ".backup";
#if defined(_WIN32) || defined(_WIN64)
//Grumble, Windows seemingly can't do this atomically.
remove(zipfile_path.c_str());
remove(backup.c_str());
#endif
rename(zipfile_path.c_str(), backup.c_str());
if(rename(temp_path.c_str(), zipfile_path.c_str()) < 0)
throw std::runtime_error("Can't rename '" + temp_path + "' -> '" + zipfile_path + "'");
committed = true;