[Newbies] Command Shell

David T. Lewis lewis at mail.msen.com
Sun Oct 14 18:59:52 UTC 2007

On Sun, Oct 14, 2007 at 12:05:18PM -0400, Chris Cunnington wrote:
> Hi, 
> I've loaded CommandShell and OSProcess (along with the Test suites for
> both). When I start Command Shell the Morphic terminal appears, but I get
> the message "cannot access system to run 'ps'", when I try to execute a
> shell command.
> Have I failed to download a necessary part, or is there a configuration
> somewhere I need to administer?

The missing piece is the OSProcessPlugin, which is an optional plugin
that permits the Squeak virtual machine to gain access to various
operating system functions.

The plugin is normally distributed with the Unix VM, so OSProcess and
CommandShell work fine on Unix and Linux systems. The plugin is also
available for the Mac OS X VM, but I don't think that it is distributed
with the Mac VM. John McIntosh makes it available on his web site
ftp.smalltalkconsulting.com, although I don't know exactly how to go
about getting it and installing it on a Mac (perhaps someone else can 
explain). On Windows, the OSProcessPlugin is not completely implemented,
so CommandShell will not work for you on Windows.


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