Pexpect can be used for automating interactive applications such as ssh, ftp, mencoder, passwd, etc. This can be done via disabledshared during configure of tcl i also had to disablethreads to get things to compile correctly. This works well and is minimal fuss for most people, but does make it rather hard to use expect s c interface in your own code. Else, expect wont bother about anything and will simply exit. Apio ca, is a tcl tk based automatic test en vironmen t. Oreilly, isbn 1565920902 the book contains hundreds of examples and also includes a tutorial on tcl. Pexpect is in the spirit of don libes expect, but pexpect is pure python. The libraries welcomes learners and scholars from all cultures and backgrounds. Command completion for all tcltk commands is provided and commmand completers for user defined commands can be easily added. The remaining commands provided by tcltest have better alternatives provided by tcltest or tcl itself. How to avoid learning expect or automating automating. The tcl library provides a parser for the tcl language, a set of builtin.
Hi, im relatively new to expect but not to shell programming and would appreciate any help in debugging a problem im having. By default, expect is built on plain not extended tcl. After doing spawn on the opensshclient installation, then you have to expect for something so that expect will wait for that. We have an application that executes tcl scripts, some of them created by users. For simplicity, is used as prompt for expect interpreter. It should work on any platform that supports the standard python pty module.
I installed solaris machine solaris 10, and then i installed successfully the following packages in order to build the expect infrastructure on my solaris machine. Modules building modules without dependent tcl libraries. Expect a tool for automating interactive programs don. Expect expect is a tcl extension designed for scripting applications. Download and install tcl with activetcl, the precompiled, supported tcl distribution. Expectare precompiled for all of the tclpro supported platforms. I have just modified one of these, and want to test it. Expect is a useful tool for feeding inputs automatically to an interactive program. The \uyyyyyyyy syntax is reserved for 32bit unicode, but i dont expect to see that. Older releases are also available from the above sites. A tcl based toolkit for automating interactive programs by don libes, oreilly and associates, january 1995. This includes history expansion and filecommand completion. Name eof check for end of file condition on channel synopsis eof channelid description returns 1 if an end of file condition occurred during the most recent input operation on channelid such as gets, 0 otherwise channelid must be an identifier for an open channel such as a tcl standard channel stdin, stdout, or stderr, the return value from an invocation of open or socket, or the.
Tcl tk w as c hosen as the basis for this automatic test en. Tcl is a popular scripting language that is easily extendable and can run on most modern operating systems. I tried to make a c code that checks these scripts to detect as many errors as possible, but i have some. The tclreadline package makes the gnu readline library available for interactive tcl shells. For example, if you are using telnet the default login option, and are running remotels. Arrays are the most flexible and useful data structure in tcl. With vnperceiued motion drawing ny, vnto the bed of my distresse and feare, she with hir hand doth put the curtaine by, and sits her downe vpon the one side there. You are reponsible for opening and close the file descriptor.
Apio ca, is a tcltk based automatic test en vironmen t. Tcl provides control flow, expression evaluation and several other features such as recursion, procedure definition, etc. Command completion for all tcl tk commands is provided and commmand completers for user defined commands can be easily added. On the other hand, autoexpect scripts do show some worthwhile things. Channelid must be an identifier for an open channel such as a tcl standard channel stdin, stdout, or stderr, the return value from an invocation of open or socket, or the result of a channel creation command provided by a tcl extension. Obviously you could write an ftp client using pythons own ftplib module, but this is just a demonstration. These modules provide a wide variety of functionality, from implementations of standard data structures to implementations of common networking protocols.
It was created by john ousterhout in the late 1980s to alleviate his frustration of having to write a unquie command language for each new piece of software he developed that required such a language. Expect script terminating too early the tcl programming language tcl tcltk, and expect. They are retained to support existing test suites, but should be avoided in new code. Expect is a tool for automating interactive programs. Installation of expect first, force expect s configure script to use binstty instead of a usrlocalbinstty it may find on the host system. Unlike other expectlike modules for python, pexpect does not require tcl or expect nor does it require c extensions to be compiled. Sometimes people get confused by tcl s quoting, so my question. Like a tclindex file, a package specifies a set of tcl andor shared libraries that. Generally any star expression will match as little as possible. My wasted spirits quite amazed were, to see the sudden morning of those eies, within the darke thus inexpected rise.
Tcl lists, which share the syntax rules of tcl commands, are explained in chapter 5. On the topic of tcl, what version of tcl was used to regress modules. Reading from a url, and reading json, from your tcl script using object oriented tcl and the tk toolkit together real life example managing the window size and layout in tcltk a new tcltk example a window to show system status test framework for tcl tcltest some examples objects in tcl itcl updated first steps example working. First we talk about some basic tcl things we need to understand for this script. How to avoid learning expect or automating automating interactive programs don libes national institute of standards and technology abstract. Pdf tcl is an interpreter for a tool command language. This allows you to use pexpect with sockets and named pipes fifos. In this case, we can wait for an eof to confirm that the installation is completed.
This works well and is minimal fuss for most people, but does make it rather hard to use expects c interface in your own code. It should be noted that the package provides exactly one instance of the interpreter, and interpreting a second grammar requires the user to either abort or complete a running interpretation, or to put them into different tcl interpreters. Online regular expression testing for tcl using regexp command. Sometimes people get confused by tcls quoting, so my question is not meant to carry any judgement with it. Adding expect as a tcl extension is very short and simple, so that will be covered first. Although everything in tcl is a string, many commands expect their string arguments to.
Tcltk w as c hosen as the basis for this automatic test en. It should be possible to script, to connect together under program control. The package facility assumes that tcl libraries are kept in wellknown directo ries. Control structure like loops and if statements are described in chapter 6. We have a few tcl tk scripts because a gui we use can incorporate macros only in tcl. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. More about exploring expect exploring expect is an excellent resource for learning and using expect. Then progress through the rest of the tutorial, which examines essential portions of the code and explains how expect is incorporated. The expect scripting language expect extends tcl to allow scripts to control interactive applications which cant otherwise be programmed. Expect script terminating too early the tcl programming.
Tcl is installed see below, and the os is linux see below env. Parsingevaluating lines of numbers the tcl programming language tcl tcltk, and expect. Examples read and print out the contents of a file linebyline. However, since tcl is a scripting language, you can easily write scripts that drive your application without. Basic principles of using tclexpect scripts github. A sample c telnet client using expect lib solutions. If youre not sure which to choose, learn more about installing packages. Inexpected definition of inexpected by the free dictionary. Im having this problem with a very simple tcl expect script that is running on solaris 5.
Think of them as a macro or way to programmaticly step through a process you would run by. No workaround was found for the compatibility issue. Had used it recently to test my code and came away impressed. The activestate tcl dev kit has a static syntax checker. A tool for automating interactive programs tip, telnet, ftp, passwd, su, rogue. It was already recommended to have the runtime tcl version the build tcl version with stubs, and now with tcl8. Hi im in a new system, trying to run some old scripts tcl i have. The main site for tcl tk source distributions is sourceforge.
The usual way of distributing expect these days puts the shared library in a nonstandard location and loads it dynamically by full pathname. The intent is to collect commonly used function into a single library, which users can rely on to be available and stable. Note that you have to build tcl without shared libraries for this to work. A tcl based toolkit for automating interactive programs nutshell handbooks to get started on a regressiontesting framework for common unix programs. Pdf, postscript, proceedings of the fifth annual tcltk workshop 97, boston. C development librariesinstalls development libraries for tcl, tk, and the bundled. Tcl comes with tcltest, which is quite useful for testing tcl scripts. Expect a tool for automating interactive programs don libes. Chapter 7 describes tcl procedures, which are new commands that you write in tcl. This will ensure that our test suite tools remain sane for the final builds of our toolchain. The ladys explanation for her appearance in the gentlemans bedchamber is disarmingly innocent.
Expect is also useful for testing these same applications as well as easing all sorts of tasks that are prohibitively difficult with anything else. The intent is to collect commonly used function into a single. We are open to all and strive to reflect our community by embracing the diversity of people and ideas. Activetcl community edition is free to use in development. Expect supports additional commands, described below. A tclbased toolkit for automating interactive programs nutshell handbooks to get started on a regressiontesting framework for common unix programs. Also of note is that the implementation assumes a pulltype handling of the input. Activetcl is an integrated collection of tcl, expect, and many other extensions. Or eventually add the path to the library using the ldflags environment variable and specify the library name using libs. As consumers, we all look to our brands and products to improve our busy, complicated lives, to make them easier and more enjoyable. It is fully portable on any operating system where the pty python module is available. It is similar to the scripting languages found in software terminal emulators like crosstalk and kermit, but isnt restricted to scripting access to communications ports.
Tcl expect scripts are an amazingly easy way to script out laborious tasks in the shell when you. If you find out that the tcl library is not in a standard place or does not appear in the cache, usually you can specify the correct location using some option of the configure script. Content management system cms task management project portfolio management time tracking pdf education learning management systems learning experience platforms virtual classroom course authoring school administration student information systems. It lets you specify expected values, flag tests to run only on certain platforms, etc. They think the only way to use tcltk is to write a script of tcl commands, then run that script using either the tclsh or wish interpreters. I was also very curious to see how tcl was used to make this tool. The expect package contains tools for automating, via scripted dialogues, interactive applications such as telnet, ftp, passwd, fsck, rlogin, and tip. Gallery about documentation support about anaconda, inc. I installed solaris machine solaris 10, and then i installed successfully the following packages in order to.
We make use of testmore for testing perl modules, and have made a little use of selenium for web pages, but we have never had any kind of automatic test rig for our tcl tk scripts. Tclexpect scripts are an amazingly easy way to script out laborious tasks in the shell when you need to be interactive with the console. Dec 22, 2014 when compared with the expect module, we can notice that pexpect doesnt rely on expect or tcl, and it does not depends on compiled c extensions. Find answers to a sample c telnet client using expect lib from the expert community at experts exchange. Jun 21, 2009 expect is a useful tool for feeding inputs automatically to an interactive program. Also, when you have 2 patterns in an expect block, any one can match first. For example, you can see how any string must be quoted in order to use it in a tcl script simply by running the strings through autoexpect. Expect is controlled by writing tcl scripts, traditionally a manual process. Pexpect is a pure python module for spawning child applications. When compared with the expect module, we can notice that pexpect doesnt rely on expect or tcl, and it does not depends on compiled c extensions. Its similar to the scripting languages used in telecommunications packages, but much more general. This paper describes autoexpect a tool that generates expect. The pexpect interface was designed to be easy to use.
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