recursive_directory_iterator引发异常 [英] recursive_directory_iterator throws exception
问题描述
我正在使用boost迭代器"recursive_directory_iterator"来递归扫描目录.但是,当迭代器运行到我的应用程序无法访问的目录中时,将引发类型为"boost :: filesystem3 :: filesystem_error"的异常,这将终止迭代器,并且程序将中止.无论如何,我可以指示迭代器跳过此类目录.
I am using the boost iterator "recursive_directory_iterator" to recursively scan through a directory. However, when the iterator runs into a directory for which my application does not have access, exception of type "boost::filesystem3::filesystem_error" is thrown, which halts the iterator and the program aborts. Is there anyway I can instruct the iterator to skip over such directories.
我尝试了建议使用的代码遍历带有boost:的目录:文件系统而不会引发异常但是,它对我没有用.我正在使用Boost 1.49.
I tried the code suggested at Traversing a directory with boost::filesystem without throwing exceptions However, it did nor work for me. I am using boost version 1.49.
遵循建议(我能提出的最好建议)后,我的代码如下:
My code after following the suggestion (the best I could come up with), looks as follows:
void scand()
{
boost::system::error_code ec, no_err;
// Read dir contents recurs
for (recursive_directory_iterator end, _path("/tmp", ec);
_path != end; _path.increment(ec)) {
if (ec != no_err) {
_path.pop();
continue;
}
cout << _path->path() << endl;
}
}
谢谢你,艾哈迈德.
推荐答案
这是boost :: filesystem(V3)中的一个已知错误:
This is a known bug in boost::filesystem (V3): https://svn.boost.org/trac/boost/ticket/4494. Depending on your needs you could use V2 of the library instead (it may even come with your compiler in the form of std::tr2::filesystem
). Another option is to implement the recursive part yourself.
boost::system::error_code ec;
std::deque<boost::filesystem::path> directories {initialDir};
while(!directories.empty())
{
boost::filesystem::directory_iterator dit(directories.front(), ec);
directories.pop_front();
while(dit != boost::filesystem::directory_iterator())
{
if(boost::filesystem::is_directory(dit->path(), ec))
{
directories.push_back(dit->path());
}
HandleFile(dit->path()); // <-- do something with the file
++dit;
}
}
上面的代码只是为了提供一个总体思路,缺少错误检查以及其他功能.
The above code is just to give a general idea, error checking among other things are missing.
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