Tcl/Tk - Expect Processes

Exercises, examples and other material relating to training module T212. This topic is presented on public courses Learning to program in Tcl, Tcl Programming, Tcl Programming

Expect can be used to control multiple connections at the same time Ð a useful facility if it's connecting to processes that take a long elapsed time to run. In this module, you'll learn how to control multiple processes, never an easy task, but much easier with Expect than with other languages!

Examples from our training material

botget	parallel expect example - get robots.txt from several servers
exp_ping	expect - multiple parallel pings, Red Hat Linux version
livetest.exp	Web based script - ping a series of remote hosts
mex	multiple processes through expect
osx_tkpingle	Checking which machines are online - Mac OSX
pingle	parallel pings - Caldera Linux version
server.tce	Expect script, web server, CGI
tkpingle	Checking network continuity using ping, Expect and a Tk GUI

Pictures

Expect can handle multiple parallel processes

Background information

Some modules are available for download as a sample of our material or under an Open Training Notes License for free download from [here].

Topics covered in this module

Multiple processes.
Spawn id s.
Expecting from multiple processes.
Adding Tk as well.
A few words of caution.

Complete learning

If you are looking for a complete course and not just a information on a single subject, visit our Listing and schedule page.

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