$"=" @ARGV";/^\D+/||print for`nmap$"`
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output:

(this script)
#netm -p1-110 localhost
25/tcp open  smtp
80/tcp open  http

(nmap)
#nmap -p1-110 localhost
Starting nmap 3.81 ( http://www.insecure.org/nmap/ ) at 2006-03-15 14:
+01 EST
Interesting ports on localhost.localdomain (127.0.0.1):
(The 108 ports scanned but not shown below are in state: closed)
PORT   STATE SERVICE
25/tcp open  smtp
80/tcp open  http
[download]