maildirwatch — wait for changes to a maildir
maildirwatch {maildir} {command} [argument...]
maildirwatch repeatedly invokes the
command, with any optional
arguments, an external
command, as follows:
The first time the
command gets executed
is immediately after
maildirwatch starts.
Subsequent invocatons of
command occur whenever
there may be some kind of a change
to the contents of the
maildir
maildirwatch does not determine what, if anything,
changed in the
maildircommand even though
nothing changed, but that's rare. It's also possible that by
the time command
actually runs, then whatever was changed in the
maildircommand to
intelligently figure out
if it needs to do something about whatever it finds in the
maildir
maildirwatch is a rudimentary mechanism for writing shell scripts that deal with newly-delivered mail, in some form or fashion.