Derived Types That Have Grown in Size

A number of derived types have changed to now represent 64-bit quantities in the 64-bit application compilation environment. This change does not affect 32-bit applications; however, any 64-bit applications that consume or export data described by these types need to be re-evaluated. An example of this is in applications that directly manipulate the utmp(4) or utmpx(4) files. For correct operation in the 64-bit application environment, do not attempt to directly access these files. Instead, use the getutxent(3C) and related family of functions.