1 /* $NetBSD: rain.c,v 1.21 2008/08/08 16:10:47 drochner 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\ 35 The Regents of the University of California. All rights reserved."); 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 1.21 2008/08/08 16:10:47 drochner 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 if (!initscr()) 97 errx(0, "couldn't initialize screen"); 98 cols = COLS - 4; 99 lines = LINES - 4; 100 101 (void)signal(SIGHUP, onsig); 102 (void)signal(SIGINT, onsig); 103 (void)signal(SIGTERM, onsig); 104 105 (void)curs_set(0); 106 for (j = 4; j >= 0; --j) { 107 xpos[j] = random() % cols + 2; 108 ypos[j] = random() % lines + 2; 109 } 110 for (j = 0;;) { 111 if (sig_caught) { 112 (void)endwin(); 113 exit(0); 114 } 115 x = random() % cols + 2; 116 y = random() % lines + 2; 117 (void)mvaddch(y, x, '.'); 118 (void)mvaddch(ypos[j], xpos[j], 'o'); 119 if (!j--) 120 j = 4; 121 (void)mvaddch(ypos[j], xpos[j], 'O'); 122 if (!j--) 123 j = 4; 124 (void)mvaddch(ypos[j] - 1, xpos[j], '-'); 125 (void)mvaddstr(ypos[j], xpos[j] - 1, "|.|"); 126 (void)mvaddch(ypos[j] + 1, xpos[j], '-'); 127 if (!j--) 128 j = 4; 129 (void)mvaddch(ypos[j] - 2, xpos[j], '-'); 130 (void)mvaddstr(ypos[j] - 1, xpos[j] - 1, "/ \\"); 131 (void)mvaddstr(ypos[j], xpos[j] - 2, "| O |"); 132 (void)mvaddstr(ypos[j] + 1, xpos[j] - 1, "\\ /"); 133 (void)mvaddch(ypos[j] + 2, xpos[j], '-'); 134 if (!j--) 135 j = 4; 136 (void)mvaddch(ypos[j] - 2, xpos[j], ' '); 137 (void)mvaddstr(ypos[j] - 1, xpos[j] - 1, " "); 138 (void)mvaddstr(ypos[j], xpos[j] - 2, " "); 139 (void)mvaddstr(ypos[j] + 1, xpos[j] - 1, " "); 140 (void)mvaddch(ypos[j] + 2, xpos[j], ' '); 141 xpos[j] = x; 142 ypos[j] = y; 143 (void)refresh(); 144 if (delay) (void)usleep(delay); 145 } 146 } 147 148 /* ARGSUSED */ 149 static void 150 onsig(int dummy __unused) 151 { 152 sig_caught = 1; 153 } 154