[hobbit] PCRE reference with examples

[Larry.Barber at usda.gov]

No \s is typically used to indicate whitespace in regexp's. \w usually
matches alphanumeric characters and the underscore character, hence Rich
probably wants something like:

HOST=%^va\w*

% - required by Hobbit to indicate the start of a regexp
^ - start of line character
\w - matches any alphanumeric/underscore character
* - 0 or more \w's

You can add a $ to the end of the line, but it won't change anything
since the * will grab all the characters to the end of the line anyway,
assuming that they are all alphanumeric and that Hobbit strips off all
the leading and trailing whitespace.

Thanks,
Larry Barber

On Thu, 2005-10-13 at 11:02 -0500, henrik at hswn.dk wrote:
> On Thu, Oct 13, 2005 at 10:50:26AM -0500, Rich Smrcina wrote: 
> > Ok, that's great info.  Thanks! 
> >  
> > Based on that I'm ending up with an expression like: 
> >  
> > HOST=$va[\d\w]*$ 
> >  
> > To match any host beginning with 'va' that has zero or more
> alphanumeric  
> > characters after it.  Is there an easier way to write this?  If
> not  
> > that's fine, I just want to make sure I'm using it correctly.
> 
> I'd say 
>   HOST=%^va[\d]*$
> 
> You need the "%" first, to tell Hobbit that what comes next is a
> regexp. 
> Then the "^" means that the expression must match at the beginning of 
> the string. "\w" is whitespace ? Think so - in that case it is not 
> needed, since Hobbit will never match with any whitepace in the 
> hostname.
> 
> > Another poster (Asif Iqbal) posted the MAIL directives with
> multiple  
> > recipients.  Does that work like he posted?  Can the multiple
> email  
> > recipients be put into a macro?  Consider the following: 
> >  
> > $pg-tom=(tomsemail at somewhere.com|tomscell at wireless.com) 
> > HOST=tomshost 
> >       MAIL $pg-tom DURATION=5m COLOR=red
> 
> What comes after the MAIL keyword is passed directly to your "mail" 
> utility. So it would probably be better to have
> 
>    $pg-tom=tomsemail at somewhere.com,tomscell at wireless.com
> 
> if your "mail" tool supports listing multiple recipients separated by 
> commas. Some dont - then you can use a short-hand notation like:
> 
>    $pg-tom=tomsemail at somewhere.com tomscell at wireless.com
> 
> and separate them by spaces - Hobbit will handle this as if you had 
> multiple "MAIL ..." lines with each of the mail recipients. So it
> sends 
> out the mail in separate e-mails, instead of one e-mail to all of the 
> recipients. (Same net effect).
> 
> 
> One more thing: I'm sure "DURATION=5m" is not what you want. Make
> that 
> "DURATION>5m".
> 
> 
> 
> Regards, 
> Henrik
> 
> 
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