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wish(1)                         Tk Applications                        wish(1)



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NAME
       wish - Simple windowing shell

SYNOPSIS
       wish ?-encoding name? ?fileName arg arg ...?

OPTIONS
       -encoding name      Specifies  the  encoding  of  the  text stored in fileName.  This option is only recognized |
                           prior to the fileName argument.

       -colormap new       Specifies that the window should have a new private colormap instead of using  the  default
                           colormap for the screen.

       -display display    Display (and screen) on which to display window.

       -geometry geometry  Initial  geometry  to  use for window.  If this option is specified, its value is stored in
                           the geometry global variable of the application's Tcl interpreter.

       -name name          Use name as the title to be displayed in the window, and as the name of the interpreter for
                           send commands.

       -sync               Execute all X server commands synchronously, so that errors are reported immediately.  This
                           will result in much slower execution, but it is useful for debugging.

       -use id             Specifies that the main window for the application is to be embedded in  the  window  whose
                           identifier  is  id, instead of being created as an independent toplevel window.  Id must be
                           specified in the same way as the value for the -use option for toplevel widgets  (i.e.   it
                           has a form like that returned by the winfo id command).
                           Note  that  on  some  platforms this will only work correctly if id refers to a Tk frame or
                           toplevel that has its -container option enabled.

       -visual visual      Specifies the visual to use for the window.  Visual may have any of the forms supported  by
                           the Tk_GetVisual procedure.

       --                  Pass  all  remaining  arguments  through to the script's argv variable without interpreting
                           them.  This provides a mechanism for passing arguments such as -name to a script instead of
                           having wish interpret them.
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DESCRIPTION
       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 interac-
       tively 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.

OPTION PROCESSING
       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.

APPLICATION NAME AND CLASS
       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.

VARIABLES
       Wish sets the following Tcl variables:

       argc           Contains a count of the number of arg arguments (0 if none), not including the options described
                      above.

       argv           Contains a Tcl list whose elements are the arg arguments that follow a -- option or do not match
                      any of the options described in OPTIONS above, in order, or an empty string if there are no such
                      arguments.

       argv0          Contains  fileName if it was specified.  Otherwise, contains the name by which wish was invoked.

       geometry       If the -geometry option is specified, wish copies its value into this variable.  If the variable
                      still  exists  after  fileName  has  been evaluated, wish uses the value of the variable in a wm
                      geometry command to set the main window's geometry.

       tcl_interactive
                      Contains 1 if wish is reading commands interactively (fileName was not  specified  and  standard
                      input is a terminal-like device), 0 otherwise.

SCRIPT FILES
       If you create a Tcl script in a file whose first line is
              #!/usr/local/bin/wish
       then  you  can invoke the script file directly from your shell if you mark it as executable.  This assumes that
       wish has been installed in the default location in /usr/local/bin;  if it is installed somewhere else then  you
       will  have  to  modify  the above line to match.  Many UNIX systems do not allow the #! line to exceed about 30
       characters in length, so be sure that the wish executable can be accessed with a short file name.

       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 "$0" "$@"
       This approach has three advantages over the approach in the previous paragraph.  First,  the  location  of  the
       wish  binary  does  not  have  to be hard-wired into the script:  it can be anywhere in your shell search path.
       Second, it gets around the 30-character file name limit in the previous approach.  Third,  this  approach  will
       work  even if wish is itself a shell script (this is done on some systems in order to handle multiple architec-
       tures or operating systems:  the wish script selects one of several binaries to run).  The  three  lines  cause
       both  sh  and  wish to process the script, but the exec is only executed by sh.  sh processes the script first;
       it treats the second line as a comment and executes the third line.  The exec statement cause the shell to stop
       processing  and  instead  to  start up wish to reprocess the entire script.  When wish starts up, it treats all
       three lines as comments, since the backslash at the end of the second line causes the third line to be  treated
       as part of the comment on the second line.

       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.

PROMPTS
       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.

KEYWORDS
       shell, toolkit



Tk                                    8.0                              wish(1)