This template code is for starting a typical tclsh application.

======none
#! /bin/sh
# the next line restarts using tclsh \
exec tclsh "$0" ${1+"$@"}
======

This is a little more sophisticated than the code suggested on the [tclsh] man page (see [tcl]), and is explained in great detail on [exec magic].

Typical patterns to continue are:
======
# verify Tcl version requirements
package require Tcl 8.4    ;# My application uses [lset]
# process stdin:
while {[gets stdin line]>=0} {
    #do something with $line
}
# process argv:
foreach arg $argv {
    # do something with $arg
}
======

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