forked from mia/Aegisub
af74371f6d
Poorly-written antivirus software briefly lock newly written files to scan them for viruses, which makes the rename from the temp file to actual file fail. Work around this by retrying the rename up to ten times. Closes #1620.
83 lines
2.4 KiB
C++
83 lines
2.4 KiB
C++
// Copyright (c) 2010, Amar Takhar <verm@aegisub.org>
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//
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// Permission to use, copy, modify, and distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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/// @file io.cpp
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/// @brief Windows IO methods.
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/// @ingroup libaegisub
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#include "libaegisub/io.h"
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#include <libaegisub/access.h>
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#include "libaegisub/fs.h"
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#include "libaegisub/log.h"
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#include "libaegisub/path.h"
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#include "libaegisub/util.h"
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#include <boost/filesystem.hpp>
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#include <boost/filesystem/fstream.hpp>
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namespace agi {
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namespace io {
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std::unique_ptr<std::ifstream> Open(fs::path const& file, bool binary) {
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LOG_D("agi/io/open/file") << file;
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acs::CheckFileRead(file);
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std::unique_ptr<std::ifstream> stream(
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new boost::filesystem::ifstream(file, (binary ? std::ios::binary : std::ios::in)));
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if (stream->fail())
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throw IOFatal("Unknown fatal error as occurred");
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return stream;
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}
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Save::Save(fs::path const& file, bool binary)
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: file_name(file)
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, tmp_name(unique_path(file.parent_path()/(file.stem().string() + "_tmp_%%%%." + file.extension().string())))
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{
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LOG_D("agi/io/save/file") << file;
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acs::CheckDirWrite(file.parent_path());
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try {
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acs::CheckFileWrite(file);
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}
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catch (fs::FileNotFound const&) {
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// Not an error
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}
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fp = util::make_unique<boost::filesystem::ofstream>(tmp_name, binary ? std::ios::binary : std::ios::out);
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if (!fp->good())
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throw fs::WriteDenied(tmp_name);
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}
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Save::~Save() {
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fp->close(); // Need to close before rename on Windows to unlock the file
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for (int i = 0; i < 10; ++i) {
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try {
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fs::Rename(tmp_name, file_name);
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return;
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}
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catch (agi::fs::FileSystemError const&) {
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// Retry up to ten times in case it's just locked by a poorly-written antivirus scanner
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if (i == 9)
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throw;
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util::sleep_for(100);
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}
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}
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}
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} // namespace io
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} // namespace agi
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