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ifstatus(8)


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   The  oldest  API  (SIOCPRIV aka mii-tool API) is not tested since it is
   obsolete.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



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