Today's Posts. Quick Links. Search Forums. Show Threads. Show Posts. Shell Programming and Scripting. Expect script to automate telnet session. Registered User. Join Date: Sep Hi all, I am currently running a daemon which creates a virtual terminal for testing purposes.
Essentially, if I were to interact with it manually, this is what I get. Code :. Join Date: Apr Try Code :. Thank you! That allowed me to execute the command "pl". However, I do not wish to allow interaction with the telnet session. I have tried putting exit at the end of the script and it does not work.
If i remove the interact command, I can terminate the script, but the command "pl" does not work. I would also like to suppress all output, and only output the result from the "pl" command.
Any ideas? I have modified that to be the following: Code :. Thank you again for your reply! You will find that Expect is an absolutely invaluable tool - using it, you will be able to automate tasks that you've never even thought of before - and you'll be able to do this automation quickly and easily.
Downloading expect, creating tickets and posting patches is best done on the sourceforge page. You can get Expect and the examples from its File manager at SourceForge. Then, at the command line, type:. This will create a directory containing the Expect distribution. Note: Expect requires Tcl. If you don't already have Tcl, you can download it as source from the Tcl Core web site or as binaries from ActiveState.
The most current snapshots of Expect will be found in the expect fossil repository. Not all snapshots are official releases.
Not all old versions of Expect are available, but some are. The current version is also available this way if you need to refer to it by explicit version.
The sha hash for expect5. There is a windows port of Expect available from ActiveState. The distribution contains many example scripts, including well-known scripts such as multixterm, kibitz, rftp recursive ftp , passmass, autoexpect and the delicious beer script. All of the substantive examples in the book are included and many of them have man pages themselves. Here's the list of examples. The best way to obtain the examples is to follow the directions for obtaining Expect above.
Once you have received and unpacked the distribution, you can find the examples in the example directory. You can also retrieve examples, man pages, and web pages individually here although you run the risk of trying an example that depends on a more up-to-date version of Expect than you have installed.
The web pages were all generated from the man pages so there should be no difference in content. Here are man pages for some of the examples. Not all of the examples need man pages but these do. DejaGnu is a popular Expect-based framework for testing other programs. If you are starting out and feel overwhelmed by the capabilities of Expect or would just like some guidance on how to structure a test suite, check out DejaGnu.
DejaGnu is used by many standards testing organizations. ActiveTcl is an integrated collection of Tcl, Expect, and many other extensions. Exploring Expect is pages. Fisher, David L. Libes, D. Winner of Best Paper Award at conference. Latest commit. Git stats commits. Failed to load latest commit information.
View code. Features: Spawning and controlling local processes with real PTYs. Native SSH spawner. Expect backed spawner for testing. Generic spawner to make implementing additional Spawners simple. Has a batcher for implementing workflows without having to write extra logic and code. Options All Spawn functions accept a variadic of type expect. CheckDuration The Go Expecter checks for new data every two seconds as default. VerboseWriter The VerboseWriter option can be used to change where the verbose session logs are written.
DebugCheck The DebugCheck option adds debugging to the alive Check done by the Expecter, this will start logging information every time the check is run. SendTimeout The SendTimeout set timeout on the Send command, without timeout the Send command will wait forewer for the expecter process. BufferSize The BufferSize option provides a mechanism to configure the client io buffer size in bytes.
Basic Examples networkbit. The Wikipedia Expect examples. Telnet First we try to replicate the Telnet example from wikipedia as close as possible. Parse fmt. Println term. Spawn fmt. Close e. Expect userRE, timeout e. Expect passRE, timeout e. Expect promptRE, timeout e.
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