wish - Unix, Linux Command

\L’|0u-1v|’




   



\L’|0u-1v’\l’75u+3n_’\L’0u+1v-0u’\l’|0u-1.5n_’


\L’|0u-1v’\L’0u+1v-0u’\l’|0u-1.5n_’






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 when the name
of a script file is presented on the wish command line,
but the script file can always source it if desired.




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 "$0" "$@"





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.



   
\L’|0u-1v|’





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.




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