1 NTWDT(7D)                           Devices                          NTWDT(7D)
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   5 NAME
   6        ntwdt - Netra--based application watchdog timer driver
   7 
   8 SYNOPSIS
   9        /dev/ntwdt
  10 
  11 
  12 DESCRIPTION
  13        The ntwdt driver is a multithreaded, loadable, non-STREAMS pseudo
  14        driver that provides an application with an interface for controlling a
  15        system watchdog timer.
  16 
  17 
  18        The ntwdt driver implements a virtual watchdog timer that a privileged
  19        application (Effective UID == 0) controls via IOCTLs.
  20 
  21 CONFIGURATION
  22        You configure the ntwdt driver by modifying the contents of the
  23        ntwdt.conf file.
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  25 ERRORS
  26        An open() fails if:
  27 
  28        EPERM
  29                  Effective user ID is not zero.
  30 
  31 
  32        ENOENT
  33                  /dev/ntwdt is not present or driver is not installed.
  34 
  35 
  36        EAGAIN
  37                  /dev/ntwdt has already been successfully open()'d.
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  39 
  40 FILES
  41        /dev/ntwdt
  42                                    Special character device.
  43 
  44 
  45        /kernel/drv/sparcv9/ntwdt
  46                                    Device driver (SPARC)
  47 
  48 
  49        /kernel/drv/ntwdt.conf
  50                                    Driver configuration file
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  52 
  53 ATTRIBUTES
  54        See attributes(5) for descriptions of the following attributes:
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  58 
  59        +---------------+-----------------+
  60        |ATTRIBUTE TYPE | ATTRIBUTE VALUE |
  61        +---------------+-----------------+
  62        |Architecture   | SPARC           |
  63        +---------------+-----------------+
  64 
  65 SEE ALSO
  66        driver.conf(4), attributes(5)
  67 
  68 
  69        Writing Device Drivers
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  73                                January 10, 2020                      NTWDT(7D)