<div dir="ltr">QH,<div><br></div><div>I'm a little unclear on the specifics, but a "while" loop opens a subshell, which could be why it's being buffered. You could use a for loop, use redirection instead of tee (>>), or something like that.</div>
<div><br></div><div>~Monkeypenny</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Mon, May 19, 2014 at 5:09 PM, Quentin Hartman <span dir="ltr"><<a href="mailto:qhartman@gmail.com" target="_blank">qhartman@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">I have a script that looks roughly like:<div><br></div><div>now=`date +%F`<br></div><div>logfile = log-$now.log</div>
<div><div>while [ 1 -eq 1 ]</div><div>do</div><div> things</div><div> if [ $? -ne 0 ]<br>
</div><div> then </div><div> echo "Oh noes!" | tee -a $logfile</div><div> fi</div><div>done</div></div><div><br></div><div>And it's run via cron, and everyday at midnight cron kills it and relaunches it. I do this to make sure it gets restarted if something goes Terribly Wrong, and also to rotate the log output into the next day's file. I know I could setup a log rotate entry for it, but I wanted this to be self-contained.</div>
<div><br></div><div>Interestingly, all of the "tee" output seems to be buffered until cron kills the script or the script dies for some other reason. This means I only get one email each day from cron that rolls up all the various errors from that day in a single message. This is actually desirable behavior in this case, but I don't understand _why_ it's happening. What if I wanted to be email immediately when an error was detected and also log the error? I'm not seeing anything in my usual reference materials that would explain this behavior.</div>
<div><br></div><div>Any ideas? Is there a better way to to execute this sort of thing?</div><span class="HOEnZb"><font color="#888888"><div><br></div><div>QH</div></font></span></div>
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