Posix api and Rtems-Shell

[rtwas]

Hello,

I'd like to use the *Shell* api with Posix. Reading the docs I see that 
when Shell is init'd "rtems_shell_init()"
that a *Task* is launched. Posix uses *Threads*. Can Tasks and Threads 
coexist in the same executable? If so
 it implies some other possible contentions, like initializing both 
*Classic Api* and *Posix Api* and their associated
*entry points*.

Help appreciated.

Robert W.