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       ifplugd - A link detection daemon for ethernet devices


       ifplugd [options]


       ifplugd  is  a  daemon which will automatically configure your ethernet
       device when a cable is plugged in and automatically unconfigure  it  if
       the  cable  is  pulled. This is useful on laptops with on-board network
       adapters, since it will only configure the interface when  a  cable  is
       really connected.

       It  uses  your  distribution’s  native ifup/ifdown programs, but can be
       configured to do anything you wish when  the  state  of  the  interface
       changes.  It  may  ignore short unplugged whiles (-d option) or plugged
       whiles (-u option).

       ifplugd may be used in "compatibility mode" by  specifying  -F  on  the
       command  line.  Than  ifplugd  will  treat network drivers which do not
       support link beat querying as always online.


       -a | --no-auto
              Do not enable interface automatically (default: off)

       -n | --no-daemon
              Do not daemonize (for debugging) (default: off)

       -s | --no-syslog
              Do not use syslog, use stdout instead (for debugging)  (default:

       -b | --no-beep
              Do not beep (off), overrides --no-beep-up and --no-beep-down.

       -U | --no-beep-up
              Do not beep on interface up (off)

       -D | --no-beep-down
              Do not beep on interface down (off)

       -f | --ignore-fail
              Ignore  detection  failure, retry instead. Failure is treated as
              "no link". (default: off)

       -F | --ignore-fail-positive
              Ignore detection failure, retry instead. Failure is  treated  as
              "link detected". (default: off)

       -i | --iface= IFACE
              Specify ethernet interface (default: eth0)

       -r | --run= EXEC
              Specify  program  to  execute when link status changes (default:

       -I | --ignore-retval
              Don’t exit on nonzero return value of program executed  on  link
              change. (default: off)

       -t | --poll-time= SECS
              Specify poll time in seconds (default: 1)

       -u | --delay-up= SECS
              Specify delay for configuring interface (default: 0)

       -d | --delay-down= SECS
              Specify delay for deconfiguring interface (default: 5)

       -m | --api-mode= MODE
              Force  a  specific  link  beat  detection  ioctl() API. Possible
              values are auto, iff, wlan, ethtool, mii, and priv for automatic
              detection,  interface  flag  (IFF_RUNNING),  wireless extension,
              SIOCETHTOOL,  SIOCGMIIREG  resp.  SIOCPRIV.   Only   the   first
              character   of  the  argument  is  relevant,  case  insensitive.
              (default: auto)

       -p | --no-startup
              Don’t call the script  to  bring  up  network  on  deamon  start
              (default: off)

       -q | --no-shutdown
              Don’t  call  the  script  for  network  shutdown  on deamon quit
              (default: off)

       -w | --wait-on-fork
              When daemonizing, wait until  the  background  process  finished
              with  the initial link beat detection. When this is enabled, the
              parent process will return the link status on exit. 2 means link
              beat  detected,  3 stands for link beat not detected, everything
              else is an error.

       -W | --wait-on-kill
              When killing a running daemon (with -k) wait  until  the  daemon

       -x | --extra-arg= ARG
              Specify an extra argument to be passed to the action script.

       -M | --monitor
              Don’t  fail when the network interface is not available, instead
              use NETLINK to monitor device  avaibility.  The  is  useful  for
              PCMCIA devices and similar.

       -h | --help
              Show help

       -k | --kill
              Kill  a running daemon (Specify -i to select the daemon instance
              to kill)

       -c | --check-running
              Check if a daemon is running for a given network interface. Sets
              the  return  value to 0 if a daemon is already running or to 255
              if not.

       -v | --version
              Show version

       -S | --supend
              Suspend a running daemon. The daemon will no  longer  check  the
              link  status  until  it  is  resumed  (-R) again. (Specify -i to
              select the daemon instance to suspend.)

       -R | --resume
              Resume a suspended daemon. (Specify  -i  to  select  the  daemon
              instance to resume.)

       -z | --info
              Request that a running daemon shall write its status information
              to syslog. (Specify -i to select the daemon instance to send the
              request to.)


       /etc/default/ifplugd:   this   file  is  sourced  by  the  init  script
       /etc/init.d/ifplugd and contains the interface to be monitored and  the
       options to be used.

       /etc/ifplugd/ifplugd.action: this is the script which will be called by
       the daemon whenever the state of the interface changes.  It  takes  two
       areguments:  the  first  is  the  interface name (eg. eth0), the second
       either "up" or "down".

       /var/run/ifplugd.<iface>.pid: the pid file for ifplugd.


       The action script will be called with two environment variables set:

       IFPLUGD_PREVIOUS The previous link status. Either "up", "down", "error"
       or  "disabled".  The former values should be obvious, the latter is set
       on daemon startup.

       IFPLUGD_CURRENT The current link status. See above for possible values.


       SIGINT,  SIGTERM  ifplugd  will  quit,  possibly  running  the shutdown
       script. This is issued by passing -k to ifplugd.

       SIGQUIT ifplugd will quit, the shutdown script is never run.

       SIGHUP ifplugd will write its status information  to  syslog.  This  is
       issued by -z.

       SIGUSR1 ifplugd will go to suspend mode. (-S)

       SIGUSR2 ifplugd will resume from suspend mode. (-R)


       ifplugd  was  written  by  Lennart  Poettering <mzvscyhtq (at) 0pointer
       (dot)        de>.        ifplugd        is         available         at


       ifplugd.conf(5), ifup(8), interfaces(5), ifconfig(8), ifplugstatus(8)


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