val command is used to validate a (possibly suspect)
sccs file. If an sccs command reports that the checksum of
an sccs file is incorrect, this may mean that the file has been
corrupted. In this case,
val may help to confirm this
(but see Why val doesn't solve the whole problem).
val s.foo val -mfoo s.foo val -r1.2 s.foo val s.foo s.bar SCCS/s.* val /proj/python/spam/spam/eggs/spam