dealing with 'exec tclsh "$0" "$@"

[otterboyy]

can seem to get this to work:
******
#!/bin/sh
exec tclsh "$0" "$@"
set dir [file dirname [info script]]
puts $dir
set pwd [exec pwd]
puts $pwd
********

ofcourse the script works fine if I use tclsh scriptname.tcl and have removed the exe tclsh.. line, but I'm trying to understand how to use this function.
all help appreciated!!

Otterboyy

[guppy]

#!/bin/sh
#
exec tclsh "$0" "$@"

I believe the tcl manual even says that.

[otterboyy]

yup..
was one of those days where I just couldn't see the obvious.
Thanks guppy!

Otterboyy