Controls how the notifications for watched files are performed. (You may want to read up on the watch and edit commands, or see the section Watches (CVS As Telephone) in Advanced CVS.) Each line is of the usual form:
REGULAR_EXPRESSION PROGRAM [ARGUMENTS]
%s in ARGUMENTS is expanded to the name of the user to be
notified, and the rest of the information regarding the notification is
passed to PROGRAM on standard input (usually this information is a brief
message suitable for emailing to the user). (See the section
Shared Syntax earlier in this chapter.)
As shipped with CVS, the notify file has one line
ALL mail %s -s "CVS notification"
which is often all you need.