Flushing output

[grutz <grutz () jingojango net>]

Here's something I'd like to see added that would help with rate-limited 
testing: really flushing out all the information nmap currently has 
about a host when interrupted with a SIGINT. It sucks to have been 
scanning 65535 ports on a subnet of 4 machines, have 3 of them be 
completed while one just sort of sits there, slowly responding. If you 
send nmap a SIGINT (^C) while it's hung on the last machine you don't 
get any information in the output other than the scan info. Now you have 
to rescan the previous hosts again.

This primarily is a problem when scanning with the Nessus nmap plugin. 
Typically we recognize the slowdown, kill nmap and work around the 
slowed system. Since we also use a secondary nmap of all ports to help 
confirm the nessus data the lack of scan output for the other systems 
just adds more work.

(oh and we're not billable since we're internal... >< )



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