On 16 Jan 1999, Harald Meland wrote:
> On connect:
> /bin/sh -c 'rm /usr/exim/configure; \
> ln -s configure.link_is_up /usr/exim/configure; \
> kill -HUP `cat /var/lock/exim-daemon.pid`; \
> /usr/exim/bin/exim -qf; '
The problem with that is that there is a very short window of time when
there is no configuation file. That won't bother the daemon, but it will
bother any other calling of Exim, e.g. by a local user to submit a new
message. However, you can do this sort of thing "atomically" by using
mv to replace the link in one operation instead of destroying it and
recreating it in two. In other words, use something like
ln -s configure_link_is_up new_configure
mv new_configure configure
instead of
rm configure
ln -s configure_link_is_up configure
--
Philip Hazel University of Cambridge Computing Service,
ph10@??? Cambridge, England. Phone: +44 1223 334714.
--
*** Exim information can be found at
http://www.exim.org/ ***
