Experimental Physics and
Industrial Control System

Susanna Jacobson <[email protected]> · Thu, 07 Aug 2008 12:10:54 -0700

In VxWorks 5.2 and previous, there was an unsupported tool called 'shadow', a
shell script that would set up a local directory structure with each file
replaced by a symbolic link to the one in the dir being shadowed. It was
written by Roger Rohrbach to do exactly what David Dudley needs to do. I don't
know right off hand how someone would obtain it other than from an ancient
VxWorks distribution.
 Susanna
Andrew Johnson wrote:
...

You might be able to use some kind of overlay filesystem to provide the local
writable directories; Linux has this capability, and I believe Solaris does
too but I don't know how to set one up.
I'm building for 3 different architectures, and I'd like to put the
EPICS source on a single (hopefully!) write protected NFS server, and
link to it when I need access to build, but would rather not have the
client machine writing directories on the server if I can get away with
it.

Unfortunately we didn't design the EPICS build system for that particular
model; the model we *did* design for is the one where your install
directories are elsewhere, but in our model the build hosts have to be able
to write to the source filesystem. If you don't want to allow writes to the
NFS filesystem it might be simpler to have three separate copies of the
source code (which you could copy or rsync off the NFS server).
- Andrew

--
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Susanna Jacobson                MS 7-222
[email protected]              Lawrence Berkeley National Laboratory
VOICE:  (510) 486-7801          1 Cyclotron Road
FAX:    (510) 486-7374          Berkeley, CA 94720-8225
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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System