Iteration through directory fails on Linux, if file is removed during iteration

[martin5233]

The following small test program fails on Linux with Boost 1.85, but not with 1.81:

bfs::ofstream out("/tmp/mytest");
out.close();

bfs::directory_iterator it("/tmp");
bfs::remove("/tmp/mytest");

while(it != bfs::directory_iterator())
 {
     if (bfs::is_regular_file(it->status()))
     {
     }
   ++it;
}

While the code above does not make much sense, it also occurs, if a file is removed by a separate process, while a directory iteration is ongoing. The generated exception is the following:

terminate called after throwing an instance of 'boost::filesystem::filesystem_error'
  what():  boost::filesystem::directory_entry::refresh: No such file or directory [system:2]: "/tmp/mytest"

[Lastique]

Thanks for the report. I've made a change that should fix the issue in your test example.

While the code above does not make much sense, it also occurs, if a file is removed by a separate process, while a directory iteration is ongoing.

Note that filesystem modifications concurrent with Boost.Filesystem operations constitute a filesystem race, and there are no guarantees on the operation results in these conditions.