18.2. Optional Mandatory Behaviors

This section specifies behaviors that are mandatory in one of the standards on which this specification relies, but which are optional in this specification.

ISO POSIX (2003) describes the behavior of the file access time, available as the st_atime field of the stat and stat64 structures. An LSB conforming implementation need not update this information every time a file is accessed.

Note: A subsequent edition of the POSIX standard no longer mandates updating of st_atime but the older edition is still the guiding standard for this specification, thus this exception is needed.