On 2016-07-11 11:41, Jousma, David wrote:
> > By PTF. Here is current maint on my system. I didn’t create these
> > symlinks. However had already done this at our shop long ago (different
> > symlinks), for the very same reason. Except, that I get to control when
> > the symlinks change.
>
Good idea. And you could craft an invariant update EXEC that
you could run electively. It could use:
address SYSCALL realpath /usr/lpp/java/current
... and use the returned path to update your link. If you're
a fanatic, you could rely on documented properties of rename()
to guarantee not even a minuscule timing window while updating
the symlink.
(Visitors to your site who follow their habits might use a
different release of java.)
> TEC1:$ cd /RSM01A/usr/lpp/java
> TEC1:$ ls -al
> total 96
> drwxr-xr-x 6 P0SJR OMVSGRP 8192 Jul 5 10:43 .
> drwxr-xr-x 42 P0SJR OMVSGRP 8192 Jan 26 14:35 ..
> drwxr-xr-x 12 P0SJR OMVSGRP 8192 Apr 22 04:01 J7.1
> drwxr-xr-x 12 P0SJR OMVSGRP 8192 Apr 22 04:07 J7.1_64
> drwxr-xr-x 12 P0SJR OMVSGRP 8192 Apr 28 00:44 J8.0
> drwxr-xr-x 12 P0SJR OMVSGRP 8192 Apr 28 00:46 J8.0_64
> lrwxrwxrwx 1 P0SJR OMVSGRP 28 Feb 8 10:31 current ->
> /RSM02A/usr/lpp/java/J8.0_64
> lrwxrwxrwx 1 P0SJR OMVSGRP 25 Jul 5 10:43 current_31 ->
> /RSM01A/usr/lpp/java/J8.0
> lrwxrwxrwx 1 P0SJR OMVSGRP 28 Jul 5 10:43 current_64 ->
> /RSM01A/usr/lpp/java/J8.0_64
-- gil
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