rain/rain.c

   1 /*      $NetBSD: rain.c,v 1.7 1995/04/29 00:51:04 mycroft 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 #ifndef lint
  37 static char copyright[] =
  38 "@(#) 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 static char rcsid[] = "$NetBSD: rain.c,v 1.7 1995/04/29 00:51:04 mycroft 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 <stdio.h>
  57 #include <termios.h>
  58 #include <signal.h>
  59
  60 #define cursor(c, r)    tputs(tgoto(CM, c, r), 1, fputchar)
  61
  62 static struct termios sg, old_tty;
  63
  64 void    fputchar __P((int));
  65 char    *LL, *TE, *tgoto();
  66
  67 main(argc, argv)
  68         int argc;
  69         char **argv;
  70 {
  71         extern speed_t ospeed;
  72         extern char *UP;
  73         register int x, y, j;
  74         register char *CM, *BC, *DN, *ND, *term;
  75         char *TI, *tcp, *mp, tcb[100],
  76                 *malloc(), *getenv(), *strcpy(), *tgetstr();
  77         long cols, lines, random();
  78         int xpos[5], ypos[5];
  79         static void onsig();
  80 #ifdef TIOCGWINSZ
  81         struct winsize ws;
  82 #endif
  83
  84         if (!(term = getenv("TERM"))) {
  85                 fprintf(stderr, "%s: TERM: parameter not set\n", *argv);
  86                 exit(1);
  87         }
  88         if (!(mp = malloc((u_int)1024))) {
  89                 fprintf(stderr, "%s: out of space.\n", *argv);
  90                 exit(1);
  91         }
  92         if (tgetent(mp, term) <= 0) {
  93                 fprintf(stderr, "%s: %s: unknown terminal type\n", *argv, term);
  94                 exit(1);
  95         }
  96         tcp = tcb;
  97         if (!(CM = tgetstr("cm", &tcp))) {
  98                 fprintf(stderr, "%s: terminal not capable of cursor motion\n", *argv);
  99                 exit(1);
 100         }
 101         if (!(BC = tgetstr("bc", &tcp)))
 102                 BC = "\b";
 103         if (!(DN = tgetstr("dn", &tcp)))
 104                 DN = "\n";
 105         if (!(ND = tgetstr("nd", &tcp)))
 106                 ND = " ";
 107 #ifdef TIOCGWINSZ
 108         if (ioctl(fileno(stdout), TIOCGWINSZ, &ws) != -1 &&
 109             ws.ws_col && ws.ws_row) {
 110                 cols = ws.ws_col;
 111                 lines = ws.ws_row;
 112         } else
 113 #endif
 114         {
 115                 if ((cols = tgetnum("co")) == -1)
 116                         cols = 80;
 117                 if ((lines = tgetnum("li")) == -1)
 118                         lines = 24;
 119         }
 120         cols -= 4;
 121         lines -= 4;
 122         TE = tgetstr("te", &tcp);
 123         TI = tgetstr("ti", &tcp);
 124         UP = tgetstr("up", &tcp);
 125         if (!(LL = tgetstr("ll", &tcp))) {
 126                 if (!(LL = malloc((u_int)10))) {
 127                         fprintf(stderr, "%s: out of space.\n", *argv);
 128                         exit(1);
 129                 }
 130                 (void)strcpy(LL, tgoto(CM, 0, 23));
 131         }
 132         (void)signal(SIGHUP, onsig);
 133         (void)signal(SIGINT, onsig);
 134         (void)signal(SIGQUIT, onsig);
 135         (void)signal(SIGSTOP, onsig);
 136         (void)signal(SIGTSTP, onsig);
 137         (void)signal(SIGTERM, onsig);
 138         tcgetattr(1, &sg);
 139         old_tty = sg;
 140         ospeed = cfgetospeed(&sg);
 141         sg.c_iflag &= ~ICRNL;
 142         sg.c_oflag &= ~ONLCR;
 143         sg.c_lflag &= ~ECHO;
 144         tcsetattr(1, TCSADRAIN, &sg);
 145         if (TI)
 146                 tputs(TI, 1, fputchar);
 147         tputs(tgetstr("cl", &tcp), 1, fputchar);
 148         (void)fflush(stdout);
 149         for (j = 4; j >= 0; --j) {
 150                 xpos[j] = random() % cols + 2;
 151                 ypos[j] = random() % lines + 2;
 152         }
 153         for (j = 0;;) {
 154                 x = random() % cols + 2;
 155                 y = random() % lines + 2;
 156                 cursor(x, y);
 157                 fputchar('.');
 158                 cursor(xpos[j], ypos[j]);
 159                 fputchar('o');
 160                 if (!j--)
 161                         j = 4;
 162                 cursor(xpos[j], ypos[j]);
 163                 fputchar('O');
 164                 if (!j--)
 165                         j = 4;
 166                 cursor(xpos[j], ypos[j] - 1);
 167                 fputchar('-');
 168                 tputs(DN, 1, fputchar);
 169                 tputs(BC, 1, fputchar);
 170                 tputs(BC, 1, fputchar);
 171                 fputs("|.|", stdout);
 172                 tputs(DN, 1, fputchar);
 173                 tputs(BC, 1, fputchar);
 174                 tputs(BC, 1, fputchar);
 175                 fputchar('-');
 176                 if (!j--)
 177                         j = 4;
 178                 cursor(xpos[j], ypos[j] - 2);
 179                 fputchar('-');
 180                 tputs(DN, 1, fputchar);
 181                 tputs(BC, 1, fputchar);
 182                 tputs(BC, 1, fputchar);
 183                 fputs("/ \\", stdout);
 184                 cursor(xpos[j] - 2, ypos[j]);
 185                 fputs("| O |", stdout);
 186                 cursor(xpos[j] - 1, ypos[j] + 1);
 187                 fputs("\\ /", stdout);
 188                 tputs(DN, 1, fputchar);
 189                 tputs(BC, 1, fputchar);
 190                 tputs(BC, 1, fputchar);
 191                 fputchar('-');
 192                 if (!j--)
 193                         j = 4;
 194                 cursor(xpos[j], ypos[j] - 2);
 195                 fputchar(' ');
 196                 tputs(DN, 1, fputchar);
 197                 tputs(BC, 1, fputchar);
 198                 tputs(BC, 1, fputchar);
 199                 fputchar(' ');
 200                 tputs(ND, 1, fputchar);
 201                 fputchar(' ');
 202                 cursor(xpos[j] - 2, ypos[j]);
 203                 fputchar(' ');
 204                 tputs(ND, 1, fputchar);
 205                 fputchar(' ');
 206                 tputs(ND, 1, fputchar);
 207                 fputchar(' ');
 208                 cursor(xpos[j] - 1, ypos[j] + 1);
 209                 fputchar(' ');
 210                 tputs(ND, 1, fputchar);
 211                 fputchar(' ');
 212                 tputs(DN, 1, fputchar);
 213                 tputs(BC, 1, fputchar);
 214                 tputs(BC, 1, fputchar);
 215                 fputchar(' ');
 216                 xpos[j] = x;
 217                 ypos[j] = y;
 218                 (void)fflush(stdout);
 219         }
 220 }
 221
 222 static void
 223 onsig()
 224 {
 225         tputs(LL, 1, fputchar);
 226         if (TE)
 227                 tputs(TE, 1, fputchar);
 228         (void)fflush(stdout);
 229         tcsetattr(1, TCSADRAIN, &old_tty);
 230         exit(0);
 231 }
 232
 233 void
 234 fputchar(c)
 235         int c;
 236 {
 237         (void)putchar(c);
 238 }