boostorg/iostreams — pull request #2 by cpatrick (2014-03-07 20:40:11+00:00)
Title: Remove explicit permissions on file open.

In mapped_file, there are explicity S_IRWXU permissions on file open. This ignores umask and that can produce an unexpected 700 permission on files created via mapped files.

https://svn.boost.org/trac/boost/ticket/7273