lists(_at_)professional(_dot_)org (Lists account) wrote:
"\ " - one space (Normal regexp for this is "\s", but egrep doesn't
recognize it -- "\ " IS valid though, as would be a non-escaped space.
[:space:] should work too.)
\s and [:space:] are character classes. They match a single whitespace
char, and not specifically a space. Procmail does not support either.
"\<" - Match the empty string BEFORE a word (see man procmailrc)
"\>" - Match the empty string AFTER a word (see man procmailrc)
Nope. In vi and some greps, yes, not in procmail. Both are shortcuts for
(basically):
(^|[^a-zA-Z0-9_]|$)
The important distinctions to note here is that while \< \> are
interchangible and *not* zero-width (or "empty string") they will
match line end conditions. (I have heard tell that $ and ^ are not
zero-width in their procmail implementations, but rather match the
newlines. The only way I have found to demonstrate this might be
the case is to have several of them in a row, which causes the
match to fail.)
* ^Message-ID:\ +<\ *>
The backslashes are not needed. (They are harmless, though.)
Elijah
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