rain/rain.c

   1 /*      $NetBSD: rain.c,v 1.13 1999/08/08 02:06:01 simonb 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 1.13 1999/08/08 02:06:01 simonb 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 }