On Wed, Apr 13, 2016, at 08:57 AM, Richard W.M. Jones wrote: > It's not possible to read the process umask without also modifying it, > which is what umask(2) does. A library cannot read umask safely, > especially if the main program might be multithreaded. I assume you just want to do this from a shared library so you can determine whether or not you need to call fchown() after making files and the like? If that's the case it'd be good to note it in the commit message. BTW...it might be a good idea to add a flags argument: https://lwn.net/Articles/585415/ Did you consider calling this `umask2`, having the initial version only support retrieving it via a UMASK_GET flag, and lay the groundwork to support setting a threadsafe umask with a UMASK_SET_THREAD flag? -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html