1 '\" te 2 .\" Copyright (c) 2005, Sun Microsystems, Inc. All Rights Reserved 3 .\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License"). You may not use this file except in compliance with the License. 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 "Jan 10, 2020" 7 .SH NAME 8 ntwdt \- Netra\(embased application watchdog timer driver 9 .SH SYNOPSIS 10 .nf 11 /dev/ntwdt 12 .fi 13 14 .SH DESCRIPTION 15 The \fBntwdt\fR driver is a multithreaded, loadable, non-STREAMS pseudo driver 16 that provides an application with an interface for controlling a system 17 watchdog timer. 18 .sp 19 .LP 20 The \fBntwdt\fR driver implements a \fBvirtual watchdog timer\fR that a 21 privileged application (Effective UID == 0) controls via IOCTLs. 22 .SH CONFIGURATION 23 You configure the \fBntwdt\fR driver by modifying the contents of the 24 \fBntwdt.conf\fR file. 25 .SH ERRORS 26 An \fBopen()\fR fails if: 27 .sp 28 .ne 2 29 .na 30 \fBEPERM\fR 31 .ad 32 .RS 10n 33 Effective user ID is not zero. 34 .RE 35 36 .sp 37 .ne 2 38 .na 39 \fBENOENT\fR 40 .ad 41 .RS 10n 42 \fB/dev/ntwdt\fR is not present or driver is not installed. 43 .RE 44 45 .sp 46 .ne 2 47 .na 48 \fBEAGAIN\fR 49 .ad 50 .RS 10n 51 \fB/dev/ntwdt\fR has already been successfully open()'d. 52 .RE 53 54 .SH FILES 55 .ne 2 56 .na 57 \fB/dev/ntwdt\fR 58 .ad 59 .RS 28n 60 Special character device. 61 .RE 62 63 .sp 64 .ne 2 65 .na 66 \fB/kernel/drv/sparcv9/ntwdt\fR 67 .ad 68 .RS 28n 69 Device driver (SPARC) 70 .RE 71 72 .sp 73 .ne 2 74 .na 75 \fB/kernel/drv/ntwdt.conf\fR 76 .ad 77 .RS 28n 78 Driver configuration file 79 .RE 80 81 .SH ATTRIBUTES 82 See \fBattributes\fR(5) for descriptions of the following attributes: 83 .sp 84 85 .sp 86 .TS 87 box; 88 c | c 89 l | l . 90 ATTRIBUTE TYPE ATTRIBUTE VALUE 91 _ 92 Architecture SPARC 93 .TE 94 95 .SH SEE ALSO 96 \fBdriver.conf\fR(4), \fBattributes\fR(5) 97 .sp 98 .LP 99 \fIWriting Device Drivers\fR