| wish(1) | Tk Applications | wish(1) |
wish - Simple windowing shell
wish ?-encoding name? ?fileName arg arg ...?
Wish is a simple program consisting of the Tcl command language, the Tk toolkit, and a main program that reads commands from standard input or from a file. It creates a main window and then processes Tcl commands. If wish is invoked with arguments, then the first few arguments, ?-encoding name? ?fileName?, specify the name of a script file, and, optionally, the encoding of the text data stored in that script file. A value for fileName is recognized if the appropriate argument does not start with “-”.
If there are no arguments, or the arguments do not specify a fileName, then wish reads Tcl commands interactively from standard input. It will continue processing commands until all windows have been deleted or until end-of-file is reached on standard input. If there exists a file “.wishrc” in the home directory of the user, wish evaluates the file as a Tcl script just before reading the first command from standard input.
If arguments to wish do specify a fileName, then fileName is treated as the name of a script file. Wish will evaluate the script in fileName (which presumably creates a user interface), then it will respond to events until all windows have been deleted. Commands will not be read from standard input. There is no automatic evaluation of “.wishrc” when the name of a script file is presented on the wish command line, but the script file can always source it if desired.
Note that on Windows, the wishversion.exe program varies from the tclshversion.exe program in an additional important way: it does not connect to a standard Windows console and is instead a windowed program. Because of this, it additionally provides access to its own console command.
Wish automatically processes all of the command-line options described in the OPTIONS summary above. Any other command-line arguments besides these are passed through to the application using the argc and argv variables described later.
The name of the application, which is used for purposes such as send commands, is taken from the -name option, if it is specified; otherwise it is taken from fileName, if it is specified, or from the command name by which wish was invoked. In the last two cases, if the name contains a “/” character, then only the characters after the last slash are used as the application name.
The class of the application, which is used for purposes such as specifying options with a RESOURCE_MANAGER property or .Xdefaults file, is the same as its name except that the first letter is capitalized.
Wish sets the following Tcl variables:
If you create a Tcl script in a file whose first line is
#!/usr/local/bin/wish
An even better approach is to start your script files with the following three lines:
#!/bin/sh
# the next line restarts using wish \
exec wish "$0" ${1+"$@"}
The end of a script file may be marked either by the physical end of the medium, or by the character, “\032” (“\u001a”, control-Z). If this character is present in the file, the wish application will read text up to but not including the character. An application that requires this character in the file may encode it as “\032”, “\x1a”, or “\u001a”; or may generate it by use of commands such as format or binary.
When wish is invoked interactively it normally prompts for each command with “% ”. You can change the prompt by setting the variables tcl_prompt1 and tcl_prompt2. If variable tcl_prompt1 exists then it must consist of a Tcl script to output a prompt; instead of outputting a prompt wish will evaluate the script in tcl_prompt1. The variable tcl_prompt2 is used in a similar way when a newline is typed but the current command is not yet complete; if tcl_prompt2 is not set then no prompt is output for incomplete commands.
tclsh(1), toplevel(n), Tk_Main(3), Tk_MainLoop(3), Tk_MainWindow(3)
application, argument, interpreter, prompt, script file, shell, toolkit, toplevel
| 8.0 | Tk |