Devices                                                 ntwdt(7D)



NAME
     ntwdt - Netra-based application watchdog timer driver

SYNOPSIS
     /dev/ntwdt


DESCRIPTION
     The ntwdt driver is a multithreaded,  loadable,  non-STREAMS
     pseudo driver that provides an application with an interface
     for controlling a system watchdog timer.


     The ntwdt driver implements a virtual watchdog timer that  a
     privileged  application  (Effective  UID  == 0) controls via
     IOCTLs.

CONFIGURATION
     You configure the ntwdt driver by modifying the contents  of
     the ntwdt.conf file.

ERORS
     An open() fails if:

     EPERM     Effective user ID is not zero.


     ENOENT    /dev/ntwdt  is  not  present  or  driver  is   not
               installed.


     EAGAIN    /dev/ntwdt has already been successfully open()'d.


FILES
     /dev/ntwdt                  Special character device.


     kernel/drv/sparcv9/ntwdt    SPARC ntwdt driver binary.


     kernel/drv/ntwdt.conf       Driver configuraton file.


ATRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:








SunOS 5.11          Last change: 05 Feb 2005                    1






Devices                                                 ntwdt(7D)



     
           ATRIBUTE TYPE               ATRIBUTE VALUE       
    
     Availability                 SUNWcakr.u                  
    
     Architecture                 SPARC                       
    


SEE ALSO
     driver.conf(4), attributes(5)


     Writing Device Drivers









































SunOS 5.11          Last change: 05 Feb 2005                    2