This ability to rename an open file is one I really miss from my HP1000
days.
hurrah for Posix - I guess I'll have to start using it!
-dtd
> -----Original Message-----
> From: Paveza, Gary [mailto:[log in to unmask]]
> Sent: Wednesday, November 22, 2000 8:43 AM
> To: [log in to unmask]
> Subject: Re: posix mv command, was UDC theory
>
>
> From what I recall, posix uses file descriptors, or handles. The name
> doesn't matter. Once the file is opened, in posix you can
> even rm the file.
> The file is still there, just the entry from the directory
> listing is gone.
> When the last accessor releases the file, then the descriptor
> is released
> and the inodes (where the actual data is stored) are freed.
>
> -------------------------------------------------------------
> Gary L. Paveza, Jr.
> Technical Services Manager
> (302) 761-3173 - voice
> (877) 720-2970 - pager
>
> -----Original Message-----
> From: Tracy Pierce [SMTP:[log in to unmask]]
> Sent: Wednesday, November 22, 2000 10:37 AM
> To: [log in to unmask]
> Subject: [HP3000-L] posix mv command, was UDC theory
>
> John Burke writes...
> > ...
> > - edit the file (say udc.pub.sys), making your changes and
> > keeping it as, for example, udcnew.pub.sys.
> >
> > - use the posix move command to replace udc with udcnew:
> >
> > :mv.hpbin.sys "/SYS/PUB/UDCNEW /SYS/PUB/UDC"
> >
> > Respond "yes" to the question about replacing udc. All
> > subsequent logons
> > will get the new version of the udc. I use this
> trick all the time
> to
> > replace files in use.
> >
> > John Burke
> >
> >
> And a cute trick it is indeed, at least to this Posix
> pre-neophyte.
> How
> does it work, that is, what's really happening with
> the files? I
> have to
> assume the SET/SHOWCATALOG settings remain pointed to
> the original
> version;
> does mv just build a link, or???
>
> Tracy Pierce
>
>
>
>
>
> > > -----Original Message-----
> > > From: Steve Hammond [mailto:[log in to unmask]]
> > > Sent: Wednesday, November 22, 2000 7:09 AM
> > > To: [log in to unmask]
> > > Subject: [HP3000-L] UDC theory
> > >
> > >
> > > Just a sanity check on my udc theory, which is a
> little rusty.
> > >
> > > When I upgrade from 5.5 to 6.0, I need to make
> one change to
> > > my PowerHouse udc. This udc is set account by account.
> > >
> > > If no one is logged on into any of the accounts
> that use the
> > > udc, I only need to make the modification to the
> udc file and
> > > keep it. Then the changes are there the next time someone
> > > logs into that account.
> > >
> > > Is this correct?
> > >
> > > TIA
> > >
> > > steve
> > >
> >
>
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