id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
4979	shared_memory_object open_only ctor resets permissions to default	Bob Dempsey <rdempsey@…>	Ion Gaztañaga	"Because of a call to ::fchmod() in shared_memory_object::priv_open_or_create, if you use attempt to open a shm segment using the open_only tag, you will always reset the existing perms to the default. These 3 lines are the problem:

{{{
   if(m_handle >= 0){
      ::fchmod(m_handle, perm.get_permissions());
   }
}}}

If you delete these lines (on Linux, anyway) things looks right. I don't know why those lines are there, but if they are needed for portability, perhaps something like

{{{
   if(m_handle >= 0 && type != detail::DoOpen){
      ::fchmod(m_handle, perm.get_permissions());
   }
}}}

might work better."	Bugs	closed	To Be Determined	interprocess	Boost 1.45.0	Problem	fixed