- Overview:

mail/opensmtpd logging stops working if syslogd is restarted, until opensmtpd is also restarted

- Steps to reproduce:

While opensmtpd is running and logging mail server activity, restart syslogd.

- Actual Results:

opensmtpd no longer logs through syslog.

- Expected Results:

opensmtpd should continue to log after syslog is restarted.

- Additional information:

Discussion with the software author and the FreeBSD port maintainer indicates that the root cause of this problem is that opensmtpd's processes open /dev/log before chrooting to /var/empty.

If syslogd is restarted, the file descriptors pointing at /dev/log are invalidated.  The opensmtpd processes try to reopen /dev/log, but as they are now chrooted to an empty directory, it is not found.