Practical Programming in Tcl & Tk, Third Edition

Remote eval through Sockets

Network sockets provide another communication mechanism you can use to evaluate Tcl commands in another application. The “name” of the application is just the host and port for the socket connection. There are a variety of schemes you can use to manage names. A crude, but effective way to manage host and ports for your servers is to record them in a file in your network file system. These examples ignore this problem. The server chooses a port and the client is expected to know what it is.

Example 40-4 implements Eval_Server that lets other applications connect and evaluate Tcl commands. The interp argument specifies the interpreter in which to evaluate the Tcl commands. If the caller of Eval_Server specifies {} for ...