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/* $NetBSD: rain.c,v 1.22 2020/10/14 18:32:04 nia 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 1.22 2020/10/14 18:32:04 nia 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 = 120000;
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;
}
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