[James Mullins]

I have this command


/sbin/ping -nqc 1 "192.168.0.5" | sed -n 's|.*/\(.*\) .*|\1|p'

where the 192.168.0.5 part corresponds to an address on my network.

If the ip address is valid, the above returns a time in ms of the ping.....

if not it times out and returns 0 after 10 - 20 sec....

my question is can I speed up this timeout?

I want it to time out after abour 1 second.....

is this possible?

Thanks in advance

James

[Cipher13]

IIRC, -w is maxwait... defaulted to 10... change that?

man ping

I can't remember, and I'm in OS9 right now.

[James Mullins]

Thanks Cipher,

No luck though...

I am not to familiar with the terminal...

Would you be able to help me next time your in X?

Thanks heaps

James

[gatorparrots]

Originally posted by James Mullins:
I have this command


/sbin/ping -nqc 1 "192.168.0.5" | sed -n 's|.*/\(.*\) .*|\1|p'

where the 192.168.0.5 part corresponds to an address on my network.

If the ip address is valid, the above returns a time in ms of the ping.....

if not it times out and returns 0 after 10 - 20 sec....

my question is can I speed up this timeout?

I want it to time out after abour 1 second.....

is this possible?

To ping with a timeout of one second, sending a single ping:
ping -i 1 -c 1 192.168.0.5

man ping for more details:

Code:
     -c count
             Stop after sending (and receiving) count ECHO_RESPONSE packets.

     -i wait
             Wait wait seconds between sending each packet.  The default is to
             wait for one second between each packet.  This option is incom-
             patible with the -f option.

[James Mullins]

Thanks for the reply gator,

but this command does not work if the ip address is not valid.

I want to time out if there is no computer at that ip address rather than waiting the full 10 sec (default timeout)

Cheers James

Any other ideas?

Greatly appreciated

[rkt]

Originally posted by Cipher13:
IIRC, -w is maxwait... defaulted to 10... change that?

yes and no...

-w is the correct switch, and is listed in the man page *but* the ping binary that ships with macosx doesn't support it...

[gatorparrots]

fink has two alternatives to the OS X-provided ping binary. You may want to try one of those to accomplish you aims:

Code:
fping   2.4b2-1 Pings a number of hosts at one time
mtr     0.44-1  Combines 'traceroute' and 'ping' functionality

[James Mullins]

Thanks for your help guys!

fping looks great, I downloaded it but cannot get it working

any help would be greatly appreciated, I am just getting used to the terminal and I need a bit of help!

Thanks James

[rkt]

Originally posted by James Mullins:
fping looks great, I downloaded it but cannot get it working

fping works okay for me here... this is what i did:

% cd /tmp
% curl -O http://www.fping.com/download/fping-2.4b2_to.tar.gz
% gnutar -zxf fping-2.4b2_to.tar.gz
% cd fping-2.4b2_to
% ./configure
% make
% sudo make install
% sudo chmod 4555 /usr/local/sbin/fping
% rehash
% fping www.apple.com

let me know if you have any questions...