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