# wish

         _________________________________________________________________

         NAME
              wish - Simple windowing shell

         SYNOPSIS
              wish ?fileName arg arg ...?

         OPTIONS
              -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.

              -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.
         _________________________________________________________________

         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 no arguments, or with a first argument that      |
              starts with ``-'', then it 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 wish is invoked with an initial fileName argument, 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  |
              in this case, but the script file can always source it if     |
              desired.

         OPTIONS
              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       |
                             don't 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's installed somewhere else then you'll 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   |
              doesn't 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 architectures 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.

         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 isn't yet complete; if tcl_prompt2
              isn't set then no prompt is output for incomplete commands.

         KEYWORDS
              shell, toolkit