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Top Forums Programming How detect TCP/IP socket shutdown when ethernet cable is disconnected Post 302436145 by jim mcnamara on Friday 9th of July 2010 09:53:47 AM
Old 07-09-2010
ping uses icmp, port 5813 (as I remember)

It is far easier simply to call popen() with a ping command ( [code]/usr/bin/ping [remote address] [code]), read the return code, than to try to rewrite ping.
 

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LIEBERT(8)							    NUT Manual								LIEBERT(8)

NAME
liebert - Driver for Liebert contact-closure UPS equipment NOTE
This man page only documents the hardware-specific features of the liebert driver. For information about the core driver, see nutupsdrv(8). SUPPORTED HARDWARE
This driver supports some Liebert UPS equipment with a contact-closure interface. This includes the UPStation GXT2 with their contact-closure cable. The smart mode ("Multilink") cable is not supported by this driver. EXTRA ARGUMENTS
This driver does not support any extra settings in the ups.conf(5). BUGS
This driver does not yet support shutdowns by raising DTR. Be aware that shutdowns are not possible with the stock contact-closure cable. You may have to build another cable with DTR connected through to the UPS for it to work. There is no way for this driver to detect the hardware or cable. It will start up successfully even if no UPS is present. This is a fundamental limitation of any contact-closure driver. SEE ALSO
The core driver: nutupsdrv(8) Internet resources: The NUT (Network UPS Tools) home page: http://www.networkupstools.org/ Network UPS Tools 05/21/2012 LIEBERT(8)
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