1 /* $OpenBSD: rain.c,v 1.21 2016/01/07 16:00:33 tb 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 /* 33 * rain 11/3/1980 EPS/CITHEP 34 * cc rain.c -o rain -O -ltermlib 35 */ 36 37 #include <curses.h> 38 #include <err.h> 39 #include <signal.h> 40 #include <stdlib.h> 41 #include <termios.h> 42 #include <unistd.h> 43 44 volatile sig_atomic_t sig_caught = 0; 45 46 static void onsig(int); 47 48 49 int 50 main(int argc, char *argv[]) 51 { 52 int x, y, j; 53 long tcols, tlines; 54 const char *errstr; 55 struct termios term; 56 struct timespec sleeptime; 57 speed_t speed; 58 time_t delay = 0; 59 int ch; 60 int xpos[5], ypos[5]; 61 62 if (pledge("stdio rpath tty", NULL) == -1) 63 err(1, "pledge"); 64 65 /* set default delay based on terminal baud rate */ 66 if (tcgetattr(STDOUT_FILENO, &term) == 0 && 67 (speed = cfgetospeed(&term)) > B9600) 68 delay = (speed / B9600) - 1; 69 70 while ((ch = getopt(argc, argv, "d:h")) != -1) 71 switch(ch) { 72 case 'd': 73 delay = (time_t)strtonum(optarg, 0, 1000, &errstr); 74 if (errstr) 75 errx(1, "delay (0-1000) is %s: %s", errstr, optarg); 76 break; 77 case 'h': 78 default: 79 (void)fprintf(stderr, "usage: rain [-d delay]\n"); 80 return 1; 81 } 82 83 /* Convert delay from ms -> ns */ 84 sleeptime.tv_sec = 0; 85 sleeptime.tv_nsec = delay * 500000; 86 timespecadd(&sleeptime, &sleeptime, &sleeptime); 87 88 initscr(); 89 90 if (pledge("stdio tty", NULL) == -1) 91 err(1, "pledge"); 92 93 tcols = COLS - 4; 94 tlines = LINES - 4; 95 96 (void)signal(SIGHUP, onsig); 97 (void)signal(SIGINT, onsig); 98 (void)signal(SIGQUIT, onsig); 99 (void)signal(SIGSTOP, onsig); 100 (void)signal(SIGTSTP, onsig); 101 (void)signal(SIGTERM, onsig); 102 103 curs_set(0); 104 for (j = 4; j >= 0; --j) { 105 xpos[j] = arc4random_uniform(tcols) + 2; 106 ypos[j] = arc4random_uniform(tlines) + 2; 107 } 108 for (j = 0;;) { 109 if (sig_caught) { 110 endwin(); 111 return 0; 112 } 113 x = arc4random_uniform(tcols) + 2; 114 y = arc4random_uniform(tlines) + 2; 115 mvaddch(y, x, '.'); 116 mvaddch(ypos[j], xpos[j], 'o'); 117 if (!j--) 118 j = 4; 119 mvaddch(ypos[j], xpos[j], 'O'); 120 if (!j--) 121 j = 4; 122 mvaddch(ypos[j] - 1, xpos[j], '-'); 123 mvaddstr(ypos[j], xpos[j] - 1, "|.|"); 124 mvaddch(ypos[j] + 1, xpos[j], '-'); 125 if (!j--) 126 j = 4; 127 mvaddch(ypos[j] - 2, xpos[j], '-'); 128 mvaddstr(ypos[j] - 1, xpos[j] - 1, "/ \\"); 129 mvaddstr(ypos[j], xpos[j] - 2, "| O |"); 130 mvaddstr(ypos[j] + 1, xpos[j] - 1, "\\ /"); 131 mvaddch(ypos[j] + 2, xpos[j], '-'); 132 if (!j--) 133 j = 4; 134 mvaddch(ypos[j] - 2, xpos[j], ' '); 135 mvaddstr(ypos[j] - 1, xpos[j] - 1, " "); 136 mvaddstr(ypos[j], xpos[j] - 2, " "); 137 mvaddstr(ypos[j] + 1, xpos[j] - 1, " "); 138 mvaddch(ypos[j] + 2, xpos[j], ' '); 139 xpos[j] = x; 140 ypos[j] = y; 141 refresh(); 142 nanosleep(&sleeptime, NULL); 143 } 144 } 145 146 static void 147 onsig(int dummy) 148 { 149 sig_caught = 1; 150 } 151