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man pages section 4: Device and Network Interfaces

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Updated: Thursday, June 13, 2019
 
 

ntwdt(4D)

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.

Errors

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 configuration file.

Attributes

See attributes(7) for descriptions of the following attributes:

ATTRIBUTE TYPE
ATTRIBUTE VALUE
Availability
system/kernel/platform
Architecture
SPARC

See Also

driver.conf(5), attributes(7)

Writing Device Drivers