The Standard ML Basis Library

The NetServDB structure

Synopsis

signature NET_SERV_DB  (* OPTIONAL *)
structure NetServDB :> NET_SERV_DB  (* OPTIONAL *)

This structure accesses the information contained in the network services data base. This data may be retrieved from the file /etc/services on many Unix systems, or from some other data base.

Interface

type entry
val name : entry -> string
val aliases : entry -> string list
val port : entry -> int
val protocol : entry -> string
val getByName : string * string option -> entry option
val getByPort : int * string option -> entry option

Description

type entry
The abstract type of a network service database entry.

name ent
returns the official name of the service described by entry ent (e.g., "ftp", "telnet", etc.).

aliases ent
returns the alias list of the service described by entry ent.

port ent
returns the port number of the service described by entry ent.

protocol ent
returns the name of the protocol to use for the service described by the entry ent (e.g., "tcp" or "udp").

getByName (s, prot)
reads the network service data base for a service with name s. If prot is SOME(protname), the protocol of the service must also match protname; if prot is NONE, no protocol restriction is imposed. If successful, it returns SOME(en) where en is the corresponding data base entry; otherwise, it returns NONE.

getByPort (i, prot)
reads the network service data base for a service with port number i. If prot is SOME(protname), the protocol of the service must also match protname; if prot is NONE, no protocol restriction is imposed. If successful, it returns SOME(en) where en the corresponding data base entry; otherwise, it returns NONE.

See Also

Socket, NetHostDB, NetProtDB
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Generated October 02, 2003
Last Modified June 5, 1998
Comments to John Reppy.

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