Re: How to determine if STDIN has piped data?

[WC -Sx- Jones]

Bryan Harris wrote:

By the way, what's a socket?

Depends upon network type and OpSys

Basically a socket is a place to send
data and "not worry" too much about where
it went.  A pipe (usually a named
permanent connection) is set-up between
two sockets or two points.  You can encrypt
data traveling over a pipe by function of the
pipe - but you usually must encrypt data
before sending it to a socket.
A Socket is typically between
applications and  their data and
pipes are between applications.
An example is MySQL:

*.mysql  *.*  0 0 49152 0 LISTEN

30001558e50 stream-ord 300026159e0 00000000 /tmp/mysql.sock

This is a local Unix Socket where MySQL
awaits a connection.
man or perldoc -

    IO::Handle
    IO::Seekable
    IO::File
    IO::Pipe
    IO::Socket
    IO::Dir
HTH/Sx

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