1.\" $OpenBSD: rain.6,v 1.18 2015/01/15 19:06:31 schwarze Exp $ 2.\" 3.\" Copyright (c) 1989, 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. Neither the name of the University nor the names of its contributors 15.\" may be used to endorse or promote products derived from this software 16.\" without specific prior written permission. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" 30.\" @(#)rain.6 8.1 (Berkeley) 5/31/93 31.\" 32.Dd $Mdocdate: January 15 2015 $ 33.Dt RAIN 6 34.Os 35.Sh NAME 36.Nm rain 37.Nd animated raindrops display 38.Sh SYNOPSIS 39.Nm rain 40.Op Fl d Ar delay 41.Sh DESCRIPTION 42.Nm 43is modeled after the VAX/VMS program of the same name. 44.Pp 45To obtain the proper effect, the 46.Fl d 47option may be used to specify a delay in milliseconds between each update. 48Reasonable values are around 20\(en200. 49The default is based on the terminal speed, computed via the following formula: 50.Pp 51.Dl delay = speed / 9600 \- 1 52.Pp 53As with any 54.Xr curses 3 55program, the 56.Ev TERM 57environment variable must be set (and exported) to the type of the 58terminal being used. 59.Sh AUTHORS 60.An Eric P. Scott 61