получить версию файла SCCS (РАЗРАБОТКА) (get a version of an SCCS file (DEVELOPMENT))
Использование в приложениях (Application usage)
Problems can arise if the system date and time have been modified
(for example, put forward and then back again, or unsynchronized
clocks across a network) and can also arise when different values
of the TZ environment variable are used.
Problems of a similar nature can also arise for the operation of
the delta utility, which compares the previous file body against
the working file as part of its normal operation.
