[Tutor] Run a few Python commands from a temporary filesystem when the rootfs is halted

[Steve Willoughby]

On 22-Apr-11 17:14, Frederick Grose wrote:
> The particulars are that I've rebuilt a Fedora LiveOS filesystem image
> from a currently running instance (incorporating the filesystem changes
> in the device-mapper overlay into a new base filesystem image file).

Right, so essentially you're talking about chrooting into the LiveOS 
image temporarily.  It's not really "halting" as such, just where the 
OS's idea of "root" is at the moment.  That involves mounting your 
LiveOS filesystem as well.

The short answer is that if you can do it in the shell, you can do it in 
Python, but there's got to be more to the story than just this.  What 
are you trying to actually do that you need Python for this?  I assume 
you're trying to automate the process of what you're doing?

Almost probably this is possible with Python, if I understand what 
you're doing.  If you just want to know how to write a Python script 
around the steps you want to accomplish, as a simple beginning Python 
experience, we may still be of service to you.

We could, for example point you to read up on the os.chroot() function 
in the Python standard library.

If your question has more to do with the particulars of managing 
chroot()ed mountpoints or preparing LiveOS images, you'd need to look to 
a forum devoted to that.


-- 
Steve Willoughby / steve at alchemy.com
"A ship in harbor is safe, but that is not what ships are built for."
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