Is Tcl expect?

Expect is an extension to the Tcl scripting language written by Don Libes. The program automates interactions with programs that expose a text terminal interface. Expect, originally written in 1990 for the Unix platform, has since become available for Microsoft Windows and other systems.

How install expect in Tcl?

Steps to start Expect on Windows:

  1. Download and install Tcl.
  2. Go to Bin directory in Command prompt (Start > Run > Command > cd c:\Tcl\bin)
  3. Issue the command C:\Tcl\bin>teacup install Expect.
  4. Done!!

What is expect command?

Expect command or expect scripting language is a language that talks with your interactive programs or scripts that require user interaction. Expect scripting language works by expecting input, then the Expect script will send the response without any user interaction.

What are the basic Tcl commands?

List of TCL commands:

  • COMMIT: Commits a Transaction.
  • ROLLBACK: Rollbacks a transaction in case of any error occurs.
  • SAVEPOINT:Sets a savepoint within a transaction.
  • SET TRANSACTION: Specify characteristics for the transaction.

What is expect package in Linux?

Expect is a program that “talks” to other interactive programs according to a script. Following the script, Expect knows what can be expected from a program and what the correct response should be. It behaves just like Expect and Tk’s wish. Expect can also be used directly in C or C++ (that is, without Tcl).

What is expect binary?

* Download Expect binaries from ActiveState * Expect Homepage. Expect is a tool for automating interactive applications such as telnet, ftp, passwd, fsck, rlogin, tip, etc. Expect really makes this stuff trivial. Expect is also useful for testing these same applications.

How do I know if a package is installed Linux?

The dpkg-query command can be used to show if a specific package is installed in your system. To do it, run dpkg-query followed by the -l flag and the name of the package you want information about.

What is expect command in Linux?

The Linux expect command takes script writing to an entirely new level. Instead of automating processes, it automates running and responding to other scripts. In other words, you can write a script that asks how you are and then create an expect script that both runs it and tells it that you’re ok.

What expect command do in Linux?

expect command or scripting language works with scripts that expect user inputs. It automates the task by providing inputs. First we write a script that will be needing inputs from users and then we will write another script using expect to automate the task.

What is Interact in expect?

Interact is an Expect command which gives control of the current process to the user, so that keystrokes are sent to the current process, and the stdout and stderr of the current process are returned.

What is command in Tcl?

The covered Tcl commands include the puts , open , gets , flush , incr , info , set , and unset commands. …

What is a Tcl code?

Tcl (pronounced “tickle” or as an initialism) is a high-level, general-purpose, interpreted, dynamic programming language. It was designed with the goal of being very simple but powerful. Tcl interpreters are available for many operating systems, allowing Tcl code to run on a wide variety of systems.

How does the expect command work in Tcl?

However, spawn’s process is running asynchronously, so spawnreturns control to Tcl immediately. Also, special Expect commands are used to communicate with the spawned process (rather than file descriptors as with exec). spawnreturns the process ID of the spawned process. The expectCommand expect?-opts?pat1body1…?-opts?patn?bodyn?

How to parse command line in a Tcl script?

I am writing script in Tcl, but want an easy and simple way to parse command line parameter. For example, the user might invoke my script as: This is one way to solve the problem. It does not mean to be the only one, but an easy and simple one. The solution is to use a library package called cmdline which comes with most Tcl installations.

How to use expect in a command line?

This tutorial shows how the Expect package can be used within a Tcl command-line script to log on to a remote machine via Telnet or SSH and return the contents of the current working directory. Note: To run this script, you must have ActiveState Expect for Windows and ActiveTcl 8.4 or later installed on your machine.

What is Line 7 in a Tcl script?

Line 7 – Define the command line parameters and their defaults. If a parameter has an .arg suffix, then it must be followed by a value. A parameter without the .arg suffix is a simple boolean (0 or 1) parameter.