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powerd



SYNOPSIS

       /sbin/powerd [tty]


DESCRIPTION

       powerd monitors the serial port connected to an UPS device
       and will perform an unattended shutdown of the  system  if
       the  UPS  is  on battery longer than a specified number of
       minutes.  powerd needs to watch a tty with  modem  control
       properties.   Please refer to the powerd documentation for
       further information.
       powerd  also  has  the  capabilities  of  notifying  other
       clients on the network that may have a UPS but not be con­
       nected to the serial line that there is  a  power  outage,
       and id configured through the powerd.conf file


CONFIGURATION FILE

       Here is the configuration format:
       Lines beginning with '#' are ignored.

       MODE <mode>
              specifies  the  mode  the  UPS  should be in. Valid
              arguements are MONITOR and PEER MONITOR  being  the
              mode  to actually watch a UPS serial port, and PEER
              being to listen for a connection from a machine  in
              MONITOR mode

       MONITOR <device>
              Specifies  which device to monitor while in MONITOR
              mode.  Specify  an  actual  device  file.  Example:
              /dev/ttyS0

       POWERFAIL <line> <high|low>
              Specifies  which lines on the serial ports indicate
              that the power is out.  Valid arguements  are  DCD,
              CAR,  CTS,  and RNG. Also specify if the line being
              HIGH or LOW indicates a power failure.
              Since most people  may  not  know  this  arguement,
              Please  use the enclosed upsdetect program to auto­
              matically find this line.

       NOTIFY <hostname[:port]> <password>
              Specified in MONITOR mode to notify a  client  run­
              ning  in  PEER  mode.  Specify  the hostname of the
              machine, and optional port the  daemon  is  running
              on,  And  the password as specified by their LISTEN
              command. See below for more details.

       LISTEN <hostname> <password>
              Specified in PEER mode, specifies a  hostname  that
              is  allowed  to notify us of when the power is out,
              and the password they shall give us to authenticate
              themselves.  The  2  passwords  should match on the
              depends on how init  is  configured.  Init  usually
              issues a 2 min shutdown.

       USER <username>
              Specifies  which username to drop to from root. The
              program will reobtain  root  access  only  when  it
              needs  to,  Like when notifying init that the power
              is out. This is simply a security feature, and  not
              needed  for  powerd  to  operate. Note: powerd must
              still be run initially as root. It will  then  drop
              to  the  user if, and only if, a username is speci­
              fied.


ARGUMENTS

       None: Please use the configuration  file  /etc/powerd.conf
       which  can  be  generated with detectups. See detectups(8)
       for more information


FILES

       /etc/powerd.conf    powerd configuration file
       /etc/powerstatus    indicates line power status
       /etc/inittab        init  is  what  actually  issues   the
                           shutdown


SEE ALSO

       powerd(8), shutdown(8), wall(1), init(8), inittab(5).


AUTHOR

       James  Brents  <James@nistix.com>  (with parts of this man
       page borrowed from all over the Linux community)

                                                        POWERD(8)
  

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