Date: Wed, 29 Aug 2007 21:54:51 +0300 From: Giorgos Keramidas <keramida@ceid.upatras.gr> To: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl> Cc: freebsd-questions@freebsd.org, Hinkie <Hinkie@paradise.net.nz> Subject: Re: FreeBSD Cron Job to run (ifconfig em0 down; ifconfig em0 up) Message-ID: <20070829185450.GA15895@kobe.laptop> In-Reply-To: <20070829185012.A14865@wojtek.tensor.gdynia.pl> References: <01a901c7ea3d$0ad62720$1e00a8c0@cheqsoft.local> <20070829185012.A14865@wojtek.tensor.gdynia.pl>
index | next in thread | previous in thread | raw e-mail
On 2007-08-29 18:51, Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl> wrote:
> fragment from my test program (used for other thing but doesn't matter)
>
> /sbin/ping -i 0.5 -s 1450 -c 3 tested_host >/dev/null 2>/dev/null
> if [ $? != 0 ];then
> perform_action_if_doesnt_ping
> fi
I'm not sure if '!=' is a 'portable' way to write sh(1) tests,
but you have a point there :-)
Rewriting this as:
#!/bin/sh
ping -i 0.5 -s 1450 -c 3 tested_host >/dev/null 2>&1
if test $? -eq 0 ; then
exit 0
fi
perform_action_if_doesnt_ping
may save you an extra indentation level too.
help
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20070829185450.GA15895>