rain/rain.c

   1 /*      $NetBSD: rain.c,v 1.19 2007/12/15 19:44:43 perry 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 1.19 2007/12/15 19:44:43 perry 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 #include <errno.h>
  59 #include <limits.h>
  60
  61 static volatile sig_atomic_t sig_caught = 0;
  62
  63 int main(int, char **);
  64 static void onsig(int);
  65
  66
  67 int
  68 main(int argc, char **argv)
  69 {
  70         int x, y, j;
  71         long cols, lines;
  72         unsigned int delay = 0;
  73         unsigned long val = 0;
  74         int ch;
  75         char *ep;
  76         int xpos[5], ypos[5];
  77
  78         while ((ch = getopt(argc, argv, "d:")) != -1)
  79                 switch (ch) {
  80                 case 'd':
  81                         val = strtoul(optarg, &ep, 0);
  82                         if (ep == optarg || *ep)
  83                                 errx(1, "Invalid delay `%s'", optarg);
  84                         if (errno == ERANGE && val == ULONG_MAX)
  85                                 err(1, "Invalid delay `%s'", optarg);
  86                         if (val >= 1000)
  87                                 errx(1, "Invalid delay `%s' (1-999)", optarg);
  88                         delay = (unsigned int)val * 1000;  /* ms -> us */
  89                         break;
  90                 default:
  91                         (void)fprintf(stderr, "Usage: %s [-d delay]\n",
  92                             getprogname());
  93                         return 1;
  94                 }
  95
  96         (void)initscr();
  97         cols = COLS - 4;
  98         lines = LINES - 4;
  99
 100         (void)signal(SIGHUP, onsig);
 101         (void)signal(SIGINT, onsig);
 102         (void)signal(SIGTERM, onsig);
 103
 104         (void)curs_set(0);
 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                         (void)endwin();
 112                         exit(0);
 113                 }
 114                 x = random() % cols + 2;
 115                 y = random() % lines + 2;
 116                 (void)mvaddch(y, x, '.');
 117                 (void)mvaddch(ypos[j], xpos[j], 'o');
 118                 if (!j--)
 119                         j = 4;
 120                 (void)mvaddch(ypos[j], xpos[j], 'O');
 121                 if (!j--)
 122                         j = 4;
 123                 (void)mvaddch(ypos[j] - 1, xpos[j], '-');
 124                 (void)mvaddstr(ypos[j], xpos[j] - 1, "|.|");
 125                 (void)mvaddch(ypos[j] + 1, xpos[j], '-');
 126                 if (!j--)
 127                         j = 4;
 128                 (void)mvaddch(ypos[j] - 2, xpos[j], '-');
 129                 (void)mvaddstr(ypos[j] - 1, xpos[j] - 1, "/ \\");
 130                 (void)mvaddstr(ypos[j], xpos[j] - 2, "| O |");
 131                 (void)mvaddstr(ypos[j] + 1, xpos[j] - 1, "\\ /");
 132                 (void)mvaddch(ypos[j] + 2, xpos[j], '-');
 133                 if (!j--)
 134                         j = 4;
 135                 (void)mvaddch(ypos[j] - 2, xpos[j], ' ');
 136                 (void)mvaddstr(ypos[j] - 1, xpos[j] - 1, "   ");
 137                 (void)mvaddstr(ypos[j], xpos[j] - 2, "     ");
 138                 (void)mvaddstr(ypos[j] + 1, xpos[j] - 1, "   ");
 139                 (void)mvaddch(ypos[j] + 2, xpos[j], ' ');
 140                 xpos[j] = x;
 141                 ypos[j] = y;
 142                 (void)refresh();
 143                 if (delay) (void)usleep(delay);
 144         }
 145 }
 146
 147 /* ARGSUSED */
 148 static void
 149 onsig(int dummy __unused)
 150 {
 151         sig_caught = 1;
 152 }