Date: Thu, 29 May 2014 20:53:04 +0200 From: Miroslav Lachman <000.fbsd@quip.cz> To: Pietro Sammarco <pietro.bsdml@gmail.com> Cc: freebsd-rc@freebsd.org Subject: Re: Help needed to add scheduling to a small rc.d script Message-ID: <53878210.3010406@quip.cz> In-Reply-To: <CA%2B7eH3XGh5yfr8eFL3oDMM4cZRVvNJF48K89p-ek5co22VF0ig@mail.gmail.com> References: <CA%2B7eH3XGh5yfr8eFL3oDMM4cZRVvNJF48K89p-ek5co22VF0ig@mail.gmail.com>
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Pietro Sammarco wrote:
[...]
> Essentially what I need to do is to add a 30 seconds scheduling time to
> this script, so that each and every 30 seconds it will check if
> google.comis pingable, and if not it will do what the script it
> supposed to do, and
> at the same time I want to keep the start and stop feature.
You can use endless loop with sleep 30 in it.
while [ 1 ];
do
if ! [ `ping -q -c 4 -o google.com > /dev/null` ]; then
ifconfig wlan0 down & ifconfig wlan0 up & dhclient wlan0
fi
sleep 30
done
It is better to send more than one packet in case of some packet loss on
the line (-c 4)
The problem with your rc script is, that it will be running forever and
will not return.
I think you need one script running like a "daemon" and another one (rc)
to control the first one. (starting / stopping)
You can learn more about rc scripting in this article
http://www.freebsd.org/doc/en/articles/rc-scripting/article.html
Miroslav Lachman
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