rain/rain.c

   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 }