Rahul wrote:
> I would like to have cron run a command and then send me an email *only* if
> the command produces some output. I wrote the command to be silent normally
> but it produces output only when things go wrong. When they do go wrong I'd
> like to hear about it. Something like:
>
> 15 * * * * fullpath/my_command.sh 2>&1 | mail -s "strange cron op"
> "me@xxx.xxx"
>
> That's not so good because it always sends me an empty email even when
> things are OK.

One solution would be to save the output to a file, and send its
contents only if it's non-empty:

my_command.sh > /tmp/c$$ 2>&1; [ -s /tmp/c$$ ] && mailx -s "subject" < /tmp/c$$; rm -f /tmp/c$$

Heiner

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