tclsh - Simple shell containing Tcl interpreter
tclsh ?fileName arg arg ...?
Tclsh is a shell-like application that reads Tcl commands
from its standard input or from a file and evaluates them.
If invoked with no arguments then it runs interactively, reading
Tcl commands from standard input and printing command results and
error messages to standard output.
It runs until the exit command is invoked or until it
reaches end-of-file on its standard input.
If there exists a file .tclshrc in the home directory of
the user, tclsh evaluates the file as a Tcl script
just before reading the first command from standard input.
If tclsh is invoked with arguments then the first argument
is the name of a script file and any additional arguments
are made available to the script as variables (see below).
Instead of reading commands from standard input tclsh will
read Tcl commands from the named file; tclsh will exit
when it reaches the end of the file.
There is no automatic evaluation of .tclshrc in this
case, but the script file can always source it if desired.
If you create a Tcl script in a file whose first line is
#!/usr/local/bin/tclsh
then you can invoke the script file directly from your shell if
you mark the file as executable.
This assumes that tclsh 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.
Tclsh sets the following Tcl variables:
- argc
-
Contains a count of the number of arg arguments (0 if none),
not including the name of the script file.
- argv
-
Contains a Tcl list whose elements are the arg arguments,
in order, or an empty string if there are no arg arguments.
- argv0
-
Contains fileName if it was specified.
Otherwise, contains the name by which tclsh was invoked.
- tcl_interactive
-
Contains 1 if tclsh is running interactively (no
fileName was specified and standard input is a terminal-like
device), 0 otherwise.
When tclsh 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 tclsh
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.
argument, interpreter, prompt, script file, shell
Copyright © 1993 The Regents of the University of California.
Copyright © 1994 Sun Microsystems, Inc.
Copyright © 1995 Roger E. Critchlow Jr.