Re: connnected?!
Re: connnected?!
- Subject: Re: connnected?!
- From: Steve Mills <email@hidden>
- Date: Tue, 7 Oct 2003 15:06:55 -0500
On Tuesday, Oct 7, 2003, at 14:10 US/Central, Patrick Mast wrote:
but i am not very happy with the ping-solution. i got the impression
that the ping command sometimes returns an error when i am online and
sets an internal variable to offline. with the next next ping without
error the scripts thinks i am online again, so the script will be
excecuted again.
is there any reliable alternative to the ping-test? i am nearly sure
there is...
I was just doing something like this today.
From my tests, do shell script won't return an error, even if ping
times out. ping will return after 10 seconds regardless. What I did was
add the quiet flag "-q", because I'm only interested in one line of the
summary returned by ping:
1 packets transmitted, 1 packets received, 0% packet loss
If the packets received is 1, the server is returned the ping. If it's
0, it didn't. Here's a hunk of my script. The routines FindEndOfString
and FindSpaceAfter do just what they say, so you should be able to roll
your own:
set pingRes to (do shell script "ping -q -c 1 'www.apple.com'")
set startPos to my FindEndOfString("packets transmitted, ", pingRes)
set endPos to my FindSpaceAfter(startPos, pingRes)
set packetsReceived to (text startPos thru endPos of pingRes) as number
if packetsReceived > 0 then
--The server is awake and responding.
end if
Steve Mills
Drummer, Mac geek
http://sjmills5.home.mchsi.com/
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| References: | |
| | >connnected?! (From: Patrick Mast <email@hidden>) |