NAME

       ifplugstatus - A link beat detection tool

SYNOPSIS

       ifplugstatus [options] [INTERFACE]

DESCRIPTION

       ifplugstatus  is an utility which may be used to detect the link status of a local Linux ethernet device,
       much in the same way mii-diag, mii-tool and ethtool work. In fact it supports all  three  different  APIs
       these  three  tools use. In addition it supports link checking with the IFF_RUNNING interface flag, which
       most modern drivers (not only ethernet) support,  and  association  status  checking  with  the  wireless
       extension API for WLAN devices.

       The APIs are tried in the following order:

       First the newest API: SIOCETHTOOL (aka ethtool API)

       Second the next older API: SIOCGMIIREG (aka mii-diag API)

       Than the WLAN API: wireless extension (aka iwconfig API)

       Followed by the cleanest API: IFF_RUNNING (aka ifconfig API)

       The oldest API (SIOCPRIV aka mii-tool API) is not tested since it is obsolete.

       ifplugstatus  may  be  used  in  shell  script since it returns the current status as return value. It is
       especially useful to detect the available APIs on the used network driver. (Option -v)

OPTIONS

       You may specify an ethernet device on the command line. Otherwise ifplugstatus will check  all  available
       network interfaces.

       -a | --auto
              Enable interface automatically before querying (default: off)

       -h | --help
              Show help

       -q | --quiet
              Decrease  verbosity  by one. If the verbosity is < 0, no text will be shown, only the return value
              is relevant; if the verbosity is = 0, a terse status will be shown;  If  the  verbosity  is  >  0,
              detailed information about the used API is returned. (By default the verbosity is 0)

       -v | --verbose
              Increase verbosity by one. See option -q.

       -V | --version
              Show version

RETURN VALUES

       0 Success

       1 Failure

       2 Link beat detected (only available when an interface is specified)

       3 Unplugged (same here)

AUTHOR

       ifplugd  was  written  by  Lennart Poettering <mzvscyhtq (at) 0pointer (dot) de>. ifplugd is available at
       http://0pointer.de/lennart/projects/ifplugd/

SEE ALSO

       mii-diag(8), mii-tool(8), ethtool(8), ifplugd(8)

COMMENTS

       This man page was written using xml2man(1) by Oliver Kurth.