* Gabor Gombas (gombasg@sztaki.hu) wrote: > On Tue, Oct 10, 2006 at 05:25:57PM -0400, Eric Dorland wrote: > > > Shouldn't it be possible to move the alternatives around in an atomic > > fashion? ln -sf bar foo.tmp ; mv foo.tmp foo . Or am I missing > > something? > > - If you set up the alternatives in preinst, then there is a time when > the symlink exists but the pointed binary hasn't been unpacked yet -> > unbootable system. > - If you set up the alternatives in postinst, there is a time when there > is no /sbin/init at all -> unbootable system. The second case is only true if the init providing packages conflict with each other, which I don't think would necessarily be the case. > It's not enough to install a single link atomically. Unpacking > /sbin/init.upstart AND setting the /sbin/init symlink AND setting the > /etc/alternatives/init symlink _together_ would have to be atomic. -- Eric Dorland <eric@kuroneko.ca> ICQ: #61138586, Jabber: hooty@jabber.com 1024D/16D970C6 097C 4861 9934 27A0 8E1C 2B0A 61E9 8ECF 16D9 70C6
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