1/5/2024 0 Comments Activetcl expect![]() If you have no spawned process at all and you expect_before, you're liable to get erratic results - for example, an application which runs interactively but fails from crontab, or one which works on one release of an operating system but fails on the next release. The Tcl (Tool Command Language) provides a powerful platform for creating integration applications that tie together diverse applications, protocols, devices, and frameworks. Expect can control multiple spawned processes, and if you specify your _befores and _afters at the wrong point, you can end up applying them to the wrong process. You should specify any expect_before and expect_after commands AFTER you have spawned the process you wish to control. Where the returned sequence from the spawned command matches several alternatives, the order of priority taken is These allow you to set up alternative sequences that every subsequent expect command in the currently spawned process will react to in addition to the ones that you've explicitly written into the expect command. Install a Tcl binary distribution for Windows like ActiveTcl or Magicsplat Tcl/Tk for Windows. This presentation will probably involve audience discussion, which will create action items. ![]() Rather than add all the alternatives into every expect command in your program, you can make use of expect_before and expect_after. The human operator can cope easily, but your expect script will have to be programmed as to what to do if it gets an unexpected message, an end of file, or a timeout where the target application hangs. ![]() If you're automating, let's say, an FTP session it could be that one day the server isn't available. Of course, applications don't always run perfectly. You can then program the sequence quite easily. When you're about to write an expect script, you should start by running the application that you're automating manually, and make a careful note of the dialogue - what output the program produces, and what you respond to it. This library contains functions that allow Expect to be used as a Tcl extension or to be used directly from C or C++ (without Tcl). Expect is a great tool for automating those awkward jobs that you have to do from the keyboard time and again! libexpect - programmed dialogue library with interactive programs. Puts "FATAL ERROR:\n\nThis program requires wish!"Ī) by explaining what "" means on a syntactic level (it seems to be checking if wish exists, but I don't know where exactly it is looking)ī) by giving me a hint what wish-files I should have other than wish.exe and where they should be placed.Posted by admin (Graham Ellis), 22 December 2002With the expect extension to Tcl, and Tcl/Tk, you can use Tcl to start ("spawn") and control (though a series of "send" and "expect" commands) an application which is designed for a human operator rather than to be controlled by another process. When I looked into the source code of woz.tcl, I realized, that I can't quite figure out all of the syntax: The reason why I am puzzled is that I do have a wish.exe and wish85.exe in C:\Tcl\bin (this path has also been added to the environment variables). When starting woz.tcl from the command line, at least I get an error: "This program requires wish!". The Woz-program (woz.tcl) used to run a few months ago and now I am puzzled to see that it does not do so anymore. So you will need to download 32bit version for ActiveTcl first and then make sure to. After installing & uninstalling both of those the 32-bit version worked (also I think it's ' teacup install Expect ' to install). I agree that it does not seem to be supported in Tcl 8.6 or 64-bit Tcl 8.5. I work on Windows 10 and have currently installed Tcl 8.5.18.0 - x86. The expect is not available yet for 64bit version of Windows 7/Vista. Adding Expect to ActiveTcl was a clear as mud. ![]() I am new to tcl and simply trying to install a complete program (this one: ).
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