The Open Group Base Specifications Issue 7, 2018 edition IEEE Std 1003.1™-2017 (Revision of IEEE Std 1003.1-2008) Copyright © 2001-2018 IEEE and The Open Group A newer edition of this standard exists POSIX.1-2017 is simultaneously IEEE Std 1003.1™-2017 and The Open Group Technical Standard Base Specifications, Issue 7. POSIX.1-2017 defines a standard operating system interface and environment, inc