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rain.c revision 1.11 
      1 /*	$NetBSD: rain.c,v 1.11 1999/07/30 02:14:56 hubertf Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1980, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 #ifndef lint
     38 __COPYRIGHT("@(#) Copyright (c) 1980, 1993\n\
     39 	The Regents of the University of California.  All rights reserved.\n");
     40 #endif /* not lint */
     41 
     42 #ifndef lint
     43 #if 0
     44 static char sccsid[] = "@(#)rain.c	8.1 (Berkeley) 5/31/93";
     45 #else
     46 __RCSID("$NetBSD: rain.c,v 1.11 1999/07/30 02:14:56 hubertf Exp $");
     47 #endif
     48 #endif /* not lint */
     49 
     50 /*
     51  * rain 11/3/1980 EPS/CITHEP
     52  * cc rain.c -o rain -O -ltermlib
     53  */
     54 
     55 #include <sys/types.h>
     56 #include <curses.h>
     57 #include <err.h>
     58 #include <signal.h>
     59 #include <stdio.h>
     60 #include <stdlib.h>
     61 #include <unistd.h>
     62 
     63 volatile sig_atomic_t sig_caught = 0;
     64 
     65 int	main __P((int, char **));
     66 void	onsig __P((int));
     67 
     68 
     69 int
     70 main(argc, argv)
     71 	int argc;
     72 	char **argv;
     73 {
     74 	int x, y, j;
     75 	long cols, lines;
     76 	unsigned int delay = 0;
     77 	int ch;
     78 	int xpos[5], ypos[5];
     79 
     80 	while ((ch = getopt(argc, argv, "d:h")) != -1)
     81 		switch (ch) {
     82 		case 'd':
     83 			if ((delay = (unsigned int)strtoul(optarg, (char **)NULL, 10)) < 1
     84 			    || delay > 1000)
     85 				errx(1, "invalid delay (1-1000)");
     86 			delay *= 1000;  /* ms -> us */
     87 			break;
     88 		case 'h':
     89 		default:
     90 			(void)fprintf(stderr, "usage: rain [-d delay]\n");
     91 			exit(1);
     92 		}
     93 
     94 	initscr();
     95 	cols = COLS - 4;
     96 	lines = LINES - 4;
     97 
     98 	(void)signal(SIGHUP, onsig);
     99 	(void)signal(SIGINT, onsig);
    100 	(void)signal(SIGQUIT, onsig);
    101 	(void)signal(SIGSTOP, onsig);
    102 	(void)signal(SIGTSTP, onsig);
    103 	(void)signal(SIGTERM, onsig);
    104 
    105 	for (j = 4; j >= 0; --j) {
    106 		xpos[j] = random() % cols + 2;
    107 		ypos[j] = random() % lines + 2;
    108 	}
    109 	for (j = 0;;) {
    110 		if (sig_caught) {
    111 			endwin();
    112 			exit(0);
    113 		}
    114 		x = random() % cols + 2;
    115 		y = random() % lines + 2;
    116 		mvaddch(y, x, '.');
    117 		mvaddch(ypos[j], xpos[j], 'o');
    118 		if (!j--)
    119 			j = 4;
    120 		mvaddch(ypos[j], xpos[j], 'O');
    121 		if (!j--)
    122 			j = 4;
    123 		mvaddch(ypos[j] - 1, xpos[j], '-');
    124 		mvaddstr(ypos[j], xpos[j] - 1, "|.|");
    125 		mvaddch(ypos[j] + 1, xpos[j], '-');
    126 		if (!j--)
    127 			j = 4;
    128 		mvaddch(ypos[j] - 2, xpos[j], '-');
    129 		mvaddstr(ypos[j] - 1, xpos[j] - 1, "/ \\");
    130 		mvaddstr(ypos[j], xpos[j] - 2, "| O |");
    131 		mvaddstr(ypos[j] + 1, xpos[j] - 1, "\\ /");
    132 		mvaddch(ypos[j] + 2, xpos[j], '-');
    133 		if (!j--)
    134 			j = 4;
    135 		mvaddch(ypos[j] - 2, xpos[j], ' ');
    136 		mvaddstr(ypos[j] - 1, xpos[j] - 1, "   ");
    137 		mvaddstr(ypos[j], xpos[j] - 2, "     ");
    138 		mvaddstr(ypos[j] + 1, xpos[j] - 1, "   ");
    139 		mvaddch(ypos[j] + 2, xpos[j], ' ');
    140 		xpos[j] = x;
    141 		ypos[j] = y;
    142 		refresh();
    143 		if (delay) usleep(delay);
    144 	}
    145 }
    146 
    147 void
    148 onsig(dummy)
    149 	int dummy __attribute__((__unused__));
    150 {
    151 	sig_caught = 1;
    152 }
    153