--- /dev/null
+.\" $NetBSD: rain.6,v 1.12 2005/09/15 02:09:41 wiz Exp $
+.\"
+.\" Copyright (c) 1989, 1993
+.\" The Regents of the University of California. All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\" notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\" notice, this list of conditions and the following disclaimer in the
+.\" documentation and/or other materials provided with the distribution.
+.\" 3. Neither the name of the University nor the names of its contributors
+.\" may be used to endorse or promote products derived from this software
+.\" without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\" @(#)rain.6 8.1 (Berkeley) 5/31/93
+.\"
+.Dd May 31, 1993
+.Dt RAIN 6
+.Os
+.Sh NAME
+.Nm rain
+.Nd animated raindrops display
+.Sh SYNOPSIS
+.Nm
+.Op Fl d Ar delay
+.Sh DESCRIPTION
+The output of
+.Nm
+is modeled after the
+.Tn VAX/VMS
+program of the same name.
+To obtain the proper effect, either the terminal must be set for 9600
+baud or the
+.Fl d
+option must be used to specify a delay, in milliseconds, between each
+update.
+A reasonable delay is 120; the default is 0.
+.Sh AUTHORS
+.An Eric P. Scott
--- /dev/null
+/* $NetBSD: rain.c,v 1.21 2008/08/08 16:10:47 drochner Exp $ */
+
+/*
+ * Copyright (c) 1980, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+#ifndef lint
+__COPYRIGHT("@(#) Copyright (c) 1980, 1993\
+ The Regents of the University of California. All rights reserved.");
+#endif /* not lint */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)rain.c 8.1 (Berkeley) 5/31/93";
+#else
+__RCSID("$NetBSD: rain.c,v 1.21 2008/08/08 16:10:47 drochner Exp $");
+#endif
+#endif /* not lint */
+
+/*
+ * rain 11/3/1980 EPS/CITHEP
+ * cc rain.c -o rain -O -ltermlib
+ */
+
+#include <sys/types.h>
+#include <curses.h>
+#include <err.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <limits.h>
+
+static volatile sig_atomic_t sig_caught = 0;
+
+int main(int, char **);
+static void onsig(int);
+
+
+int
+main(int argc, char **argv)
+{
+ int x, y, j;
+ long cols, lines;
+ unsigned int delay = 0;
+ unsigned long val = 0;
+ int ch;
+ char *ep;
+ int xpos[5], ypos[5];
+
+ while ((ch = getopt(argc, argv, "d:")) != -1)
+ switch (ch) {
+ case 'd':
+ val = strtoul(optarg, &ep, 0);
+ if (ep == optarg || *ep)
+ errx(1, "Invalid delay `%s'", optarg);
+ if (errno == ERANGE && val == ULONG_MAX)
+ err(1, "Invalid delay `%s'", optarg);
+ if (val >= 1000)
+ errx(1, "Invalid delay `%s' (1-999)", optarg);
+ delay = (unsigned int)val * 1000; /* ms -> us */
+ break;
+ default:
+ (void)fprintf(stderr, "Usage: %s [-d delay]\n",
+ getprogname());
+ return 1;
+ }
+
+ if (!initscr())
+ errx(0, "couldn't initialize screen");
+ cols = COLS - 4;
+ lines = LINES - 4;
+
+ (void)signal(SIGHUP, onsig);
+ (void)signal(SIGINT, onsig);
+ (void)signal(SIGTERM, onsig);
+
+ (void)curs_set(0);
+ for (j = 4; j >= 0; --j) {
+ xpos[j] = random() % cols + 2;
+ ypos[j] = random() % lines + 2;
+ }
+ for (j = 0;;) {
+ if (sig_caught) {
+ (void)endwin();
+ exit(0);
+ }
+ x = random() % cols + 2;
+ y = random() % lines + 2;
+ (void)mvaddch(y, x, '.');
+ (void)mvaddch(ypos[j], xpos[j], 'o');
+ if (!j--)
+ j = 4;
+ (void)mvaddch(ypos[j], xpos[j], 'O');
+ if (!j--)
+ j = 4;
+ (void)mvaddch(ypos[j] - 1, xpos[j], '-');
+ (void)mvaddstr(ypos[j], xpos[j] - 1, "|.|");
+ (void)mvaddch(ypos[j] + 1, xpos[j], '-');
+ if (!j--)
+ j = 4;
+ (void)mvaddch(ypos[j] - 2, xpos[j], '-');
+ (void)mvaddstr(ypos[j] - 1, xpos[j] - 1, "/ \\");
+ (void)mvaddstr(ypos[j], xpos[j] - 2, "| O |");
+ (void)mvaddstr(ypos[j] + 1, xpos[j] - 1, "\\ /");
+ (void)mvaddch(ypos[j] + 2, xpos[j], '-');
+ if (!j--)
+ j = 4;
+ (void)mvaddch(ypos[j] - 2, xpos[j], ' ');
+ (void)mvaddstr(ypos[j] - 1, xpos[j] - 1, " ");
+ (void)mvaddstr(ypos[j], xpos[j] - 2, " ");
+ (void)mvaddstr(ypos[j] + 1, xpos[j] - 1, " ");
+ (void)mvaddch(ypos[j] + 2, xpos[j], ' ');
+ xpos[j] = x;
+ ypos[j] = y;
+ (void)refresh();
+ if (delay) (void)usleep(delay);
+ }
+}
+
+/* ARGSUSED */
+static void
+onsig(int dummy __unused)
+{
+ sig_caught = 1;
+}