can open a two-way
TCP/IP connection, acting as either a client or a server.
This is done using a special file name of the form:
net-type is one of ‘
inet4’, or ‘
protocol is one of ‘
tcp’ or ‘
and the other fields represent the other essential pieces of information
for making a networking connection.
These file names are used with the ‘
|&’ operator for communicating
with a coprocess
(see section Two-Way Communications with Another Process).
This is an advanced feature, mentioned here only for completeness.
Full discussion is delayed until
gawk for Network Programming.