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tclsh.1
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1993-06-07
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'\"
'\" Copyright (c) 1993 The Regents of the University of California.
'\" All rights reserved.
'\"
'\" Permission is hereby granted, without written agreement and without
'\" license or royalty fees, to use, copy, modify, and distribute this
'\" documentation for any purpose, provided that the above copyright
'\" notice and the following two paragraphs appear in all copies.
'\"
'\" IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY
'\" FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
'\" ARISING OUT OF THE USE OF THIS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
'\" CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
'\"
'\" THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
'\" INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
'\" AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
'\" ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
'\" PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
'\"
'\" $Header: /user6/ouster/tcl/man/RCS/tclsh.1,v 1.1 93/06/07 15:31:32 ouster Exp $ SPRITE (Berkeley)
'/"
.so man.macros
.HS tclsh tclcmds
.BS
'\" Note: do not modify the .SH NAME line immediately below!
.SH NAME
tclsh \- Simple shell containing Tcl interpreter
.SH SYNOPSIS
\fBtclsh\fR ?\fIfileName arg arg ...\fR?\fR
.BE
.SH DESCRIPTION
.PP
\fBTclsh\fR 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 \fBexit\fR command is invoked or until it
reaches end-of-file on its standard input.
.PP
If \fBtclsh\fR is invoked with arguments then the first argument
is the name of a script file and the other arguments (if any)
are made available to the script to use in any way that it wishes.
Instead of reading commands from standard input \fBtclsh\fR will
read Tcl commands from the named file; \fBtclsh\fR will exit
when it reaches the end of the file.
.PP
\fBTclsh\fR sets the following Tcl variables to describe its
command-line arguments:
.TP
\fBargc\fR
Contains a count of the number of \fIarg\fR arguments (0 if none).
.TP
\fBargv\fR
Contains a Tcl list whose elements are the \fIarg\fR arguments,
in order, or an empty string if there are no \fIarg\fR arguments.
.TP
\fBargv0\fR
Contains \fIfileName\fR if it was specified.
Otherwise, contains the name by which \fBtclsh\fR was invoked.
.PP
If you create a Tcl script in a file whose first line is
.DS
\fB#!/usr/local/bin/tclsh
.DE
then you can invoke the script file directly from your shell if
you mark it as executable.
This assumes that \fBtclsh\fR 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.
.SH KEYWORDS
interpreter, script file, shell