My question is: Realizing that procmail condition lines are normally
and'ed and *not* or'ed, is it possible that a Boolean operator such as
*NOT* might be used to establish a condition in an rc.script?
While this has already been answered on the list, I thought I'd point
out that there are a few ways to do a logical OR of conditions.
Someone posted a solution here that involved using procmail's scoring
system, but I figured you could do it without scoring by taking
advantage of De Morgan's rule:
not (not a and not b) = a or b
Or in procmail syntax, if the "and" condition version is
:0
* condition1
* condition2
action
rest_of_file
Then the "or" condition version can be written as
:0
* ! condition1
* ! condition2
{
rest_of_file
:0 # Would these lines be needed?
DEFAULT # They are done by default at the end of
:0 # the RC file but does the E flag in the
ORGMAIL # condition below know or care that this is
# inside a block?
}
:0 E
action
Has anyone tried this? Does it work? If there are flaws in it,
would they be relatively easy to overcome?
--
Tim Pickett
tlm(_at_)yoyo(_dot_)cc(_dot_)monash(_dot_)edu(_dot_)au
"Her daddy'll *love* that."
tbp(_at_)molly(_dot_)cs(_dot_)monash(_dot_)edu(_dot_)au