Date: Tue, 4 Jul 2017 20:02:30 +0200 From: Matthias Fechner <idefix@fechner.net> To: freebsd-ports@freebsd.org Subject: Re: Best practice to tail a log and start it as service using rc.d scripts Message-ID: <34946b34-5e91-031f-b1dc-146c3ded4803@fechner.net> In-Reply-To: <595A8B47.2060705@grosbein.net> References: <62c231e8-74b0-8515-eb22-4e4edf6ff5e2@fechner.net> <595A8B47.2060705@grosbein.net>
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Am 03.07.2017 um 20:21 schrieb Eugene Grosbein: > For logs written using standard syslog service, there is much > effective way. > 1. The syslogd daemon can run a subprocess and duplicate log stream to its > standard input. For example, write to its config: > > mail.* "|exec nc localhost 5699 -" > > See man syslog.conf for details. You can even pipe not full log > but some part of it, f.e. `mail.notice' instead of `mail.*' > for important event only (no debug lines, no informational mesages). thanks for this, I will test that more in detail. I correctly have the problem if the mailtrain app is stopped, it closes the network socket which causes nc to terminate. This is not what I would like to have, but maybe syslog is restarting nc in this case? If not syslog is maybe not the right solution, but I will test this first. > 2. And you need not modify system /etc/syslog.conf but create file > named like /usr/local/etc/syslog.d/mailtrain.conf with that single line. > Then use `service syslogd reload' to apply additional configuration > and syslogd will run your "addon" when corresponding logs is updated. are you sure about this? I cannot find that described in any man page, /etc/defaults/rc.conf neither. I tested it but it is not working. Just added a file: /usr/local/etc/syslog.d/mailtrain.conf with content: mail.* /var/log/maillog.err I touched the /var/log/maillog.err and reloaded syslogd. But nothing appears in that file. Thanks Matthias -- "Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the universe trying to produce bigger and better idiots. So far, the universe is winning." -- Rich Cook
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