Home | History | Annotate | Line # | Download | only in rain
rain.c revision 1.16 
      1 /*	$NetBSD: rain.c,v 1.16 2004/02/08 22:21:57 jsm 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. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #ifndef lint
     34 __COPYRIGHT("@(#) Copyright (c) 1980, 1993\n\
     35 	The Regents of the University of California.  All rights reserved.\n");
     36 #endif /* not lint */
     37 
     38 #ifndef lint
     39 #if 0
     40 static char sccsid[] = "@(#)rain.c	8.1 (Berkeley) 5/31/93";
     41 #else
     42 __RCSID("$NetBSD: rain.c,v 1.16 2004/02/08 22:21:57 jsm Exp $");
     43 #endif
     44 #endif /* not lint */
     45 
     46 /*
     47  * rain 11/3/1980 EPS/CITHEP
     48  * cc rain.c -o rain -O -ltermlib
     49  */
     50 
     51 #include <sys/types.h>
     52 #include <curses.h>
     53 #include <err.h>
     54 #include <signal.h>
     55 #include <stdio.h>
     56 #include <stdlib.h>
     57 #include <unistd.h>
     58 
     59 volatile sig_atomic_t sig_caught = 0;
     60 
     61 int	main(int, char **);
     62 void	onsig(int);
     63 
     64 
     65 int
     66 main(argc, argv)
     67 	int argc;
     68 	char **argv;
     69 {
     70 	int x, y, j;
     71 	long cols, lines;
     72 	unsigned int delay = 0;
     73 	int ch;
     74 	int xpos[5], ypos[5];
     75 
     76 	while ((ch = getopt(argc, argv, "d:h")) != -1)
     77 		switch (ch) {
     78 		case 'd':
     79 			if ((delay = (unsigned int)strtoul(optarg, (char **)NULL, 10)) < 1
     80 			    || delay > 1000)
     81 				errx(1, "invalid delay (1-1000)");
     82 			delay *= 1000;  /* ms -> us */
     83 			break;
     84 		case 'h':
     85 		default:
     86 			(void)fprintf(stderr, "usage: rain [-d delay]\n");
     87 			exit(1);
     88 		}
     89 
     90 	initscr();
     91 	cols = COLS - 4;
     92 	lines = LINES - 4;
     93 
     94 	(void)signal(SIGHUP, onsig);
     95 	(void)signal(SIGINT, onsig);
     96 	(void)signal(SIGQUIT, onsig);
     97 	(void)signal(SIGSTOP, onsig);
     98 	(void)signal(SIGTSTP, onsig);
     99 	(void)signal(SIGTERM, onsig);
    100 
    101 	curs_set(0);
    102 	for (j = 4; j >= 0; --j) {
    103 		xpos[j] = random() % cols + 2;
    104 		ypos[j] = random() % lines + 2;
    105 	}
    106 	for (j = 0;;) {
    107 		if (sig_caught) {
    108 			endwin();
    109 			exit(0);
    110 		}
    111 		x = random() % cols + 2;
    112 		y = random() % lines + 2;
    113 		mvaddch(y, x, '.');
    114 		mvaddch(ypos[j], xpos[j], 'o');
    115 		if (!j--)
    116 			j = 4;
    117 		mvaddch(ypos[j], xpos[j], 'O');
    118 		if (!j--)
    119 			j = 4;
    120 		mvaddch(ypos[j] - 1, xpos[j], '-');
    121 		mvaddstr(ypos[j], xpos[j] - 1, "|.|");
    122 		mvaddch(ypos[j] + 1, xpos[j], '-');
    123 		if (!j--)
    124 			j = 4;
    125 		mvaddch(ypos[j] - 2, xpos[j], '-');
    126 		mvaddstr(ypos[j] - 1, xpos[j] - 1, "/ \\");
    127 		mvaddstr(ypos[j], xpos[j] - 2, "| O |");
    128 		mvaddstr(ypos[j] + 1, xpos[j] - 1, "\\ /");
    129 		mvaddch(ypos[j] + 2, xpos[j], '-');
    130 		if (!j--)
    131 			j = 4;
    132 		mvaddch(ypos[j] - 2, xpos[j], ' ');
    133 		mvaddstr(ypos[j] - 1, xpos[j] - 1, "   ");
    134 		mvaddstr(ypos[j], xpos[j] - 2, "     ");
    135 		mvaddstr(ypos[j] + 1, xpos[j] - 1, "   ");
    136 		mvaddch(ypos[j] + 2, xpos[j], ' ');
    137 		xpos[j] = x;
    138 		ypos[j] = y;
    139 		refresh();
    140 		if (delay) usleep(delay);
    141 	}
    142 }
    143 
    144 void
    145 onsig(dummy)
    146 	int dummy __attribute__((__unused__));
    147 {
    148 	sig_caught = 1;
    149 }
    150