1 '\" te
   2 .\" Copyright (c) 2005, Sun Microsystems, Inc.  All Rights Reserved
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   4 .\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing.  See the License for the specific language governing permissions and limitations under the License.
   5 .\" When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE.  If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
   6 .TH NTWDT 7D "Feb 05, 2005"
   7 .SH NAME
   8 ntwdt \- Netra\(embased application watchdog timer driver
   9 .SH SYNOPSIS
  10 .LP
  11 .nf
  12 /dev/ntwdt
  13 .fi
  14 
  15 .SH DESCRIPTION
  16 .sp
  17 .LP
  18 The \fBntwdt\fR driver is a multithreaded, loadable, non-STREAMS pseudo driver
  19 that provides an application with an interface for controlling a system
  20 watchdog timer.
  21 .sp
  22 .LP
  23 The \fBntwdt\fR driver implements a \fBvirtual watchdog timer\fR that a
  24 privileged application (Effective UID == 0) controls via IOCTLs.
  25 .SH CONFIGURATION
  26 .sp
  27 .LP
  28 You configure the \fBntwdt\fR driver by modifying the contents of the
  29 \fBntwdt.conf\fR file.
  30 .SH ERRORS
  31 .sp
  32 .LP
  33 An \fBopen()\fR fails if:
  34 .sp
  35 .ne 2
  36 .na
  37 \fBEPERM\fR
  38 .ad
  39 .RS 10n
  40 Effective user ID is not zero.
  41 .RE
  42 
  43 .sp
  44 .ne 2
  45 .na
  46 \fBENOENT\fR
  47 .ad
  48 .RS 10n
  49 \fB/dev/ntwdt\fR is not present or driver is not installed.
  50 .RE
  51 
  52 .sp
  53 .ne 2
  54 .na
  55 \fBEAGAIN\fR
  56 .ad
  57 .RS 10n
  58 \fB/dev/ntwdt\fR has already been successfully open()'d.
  59 .RE
  60 
  61 .SH FILES
  62 .sp
  63 .ne 2
  64 .na
  65 \fB/dev/ntwdt\fR
  66 .ad
  67 .RS 28n
  68 Special character device.
  69 .RE
  70 
  71 .sp
  72 .ne 2
  73 .na
  74 \fBkernel/drv/sparcv9/ntwdt\fR
  75 .ad
  76 .RS 28n
  77 SPARC ntwdt driver binary.
  78 .RE
  79 
  80 .sp
  81 .ne 2
  82 .na
  83 \fBkernel/drv/ntwdt.conf\fR
  84 .ad
  85 .RS 28n
  86 Driver configuraton file.
  87 .RE
  88 
  89 .SH ATTRIBUTES
  90 .sp
  91 .LP
  92 See \fBattributes\fR(5) for descriptions of the following attributes:
  93 .sp
  94 
  95 .sp
  96 .TS
  97 box;
  98 c | c
  99 l | l .
 100 ATTRIBUTE TYPE  ATTRIBUTE VALUE
 101 _
 102 Architecture    SPARC
 103 .TE
 104 
 105 .SH SEE ALSO
 106 .sp
 107 .LP
 108 \fBdriver.conf\fR(4), \fBattributes\fR(5)
 109 .sp
 110 .LP
 111 \fIWriting Device Drivers\fR