net-service port not service?

[kanen]

I like net-service:

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net-service
syntax: (net-service str-service str-protocol)
Makes a lookup in the services database and returns the standard port number for this service.
Returns nil on failure.
 (net-service "ftp" "tcp") --> 21

But, I would like to be able to specify a port, not a service name, and get the name back. Right now, I have code that parses the "services" file and does this.

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(net-service "" "tcp" 21)  --> ftp
syntax: (net-service str-service str-protocol port-number)
Returns nil on failure or the name of the service.

Thoughts?

[Lutz]

that was easy to add:

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newLISP v.10.2.2 on Win32 IPv4, execute 'newlisp -h' for more info.

> (net-service 22 "tcp")
"ssh"
> (net-service "ssh" "tcp")
22
>

I will post a development version 10.2.2 when back from Europe on the 22nd/23rd of of April.