is a heavily simplified version of the Shell.
It reads one line from the standard
input file, interprets it as a command, and calls the command.
The mini-shell supports few of the advanced features
of the Shell; none of the following characters is special:
However, ``*'', ``['', and ``?'' are recognized and \fIglob\fR is called.
The main use of \fImsh\fR is to provide a command-executing
facility for various interactive sub-systems.