rain/rain.c

   1 /*
   2  * Copyright (c) 1980 Regents of the University of California.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #ifndef lint
  35 char copyright[] =
  36 "@(#) Copyright (c) 1980 Regents of the University of California.\n\
  37  All rights reserved.\n";
  38 #endif /* not lint */
  39
  40 #ifndef lint
  41 /*static char sccsid[] = "from: @(#)rain.c      5.6 (Berkeley) 2/28/91";*/
  42 static char rcsid[] = "$Id: rain.c,v 1.3 1993/12/08 08:18:22 mycroft Exp $";
  43 #endif /* not lint */
  44
  45 /*
  46  * rain 11/3/1980 EPS/CITHEP
  47  * cc rain.c -o rain -O -ltermlib
  48  */
  49
  50 #include <sys/types.h>
  51 #include <stdio.h>
  52 #ifdef USG
  53 #include <termio.h>
  54 #else
  55 #include <sgtty.h>
  56 #endif
  57 #include <signal.h>
  58
  59 #define cursor(c, r)    tputs(tgoto(CM, c, r), 1, fputchar)
  60
  61 #ifdef USG
  62 static struct termio sg, old_tty;
  63 #else
  64 static struct sgttyb sg, old_tty;
  65 #endif
  66
  67 static void fputchar();
  68 char    *LL, *TE, *tgoto();
  69
  70 main(argc, argv)
  71         int argc;
  72         char **argv;
  73 {
  74         extern short ospeed;
  75         extern char *UP;
  76         register int x, y, j;
  77         register char *CM, *BC, *DN, *ND, *term;
  78         char *TI, *tcp, *mp, tcb[100],
  79                 *malloc(), *getenv(), *strcpy(), *tgetstr();
  80         long cols, lines, random();
  81         int xpos[5], ypos[5];
  82         static void onsig();
  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         if ((cols = tgetnum("co")) == -1)
 108                 cols = 80;
 109         if ((lines = tgetnum("li")) == -1)
 110                 lines = 24;
 111         cols -= 4;
 112         lines -= 4;
 113         TE = tgetstr("te", &tcp);
 114         TI = tgetstr("ti", &tcp);
 115         UP = tgetstr("up", &tcp);
 116         if (!(LL = tgetstr("ll", &tcp))) {
 117                 if (!(LL = malloc((u_int)10))) {
 118                         fprintf(stderr, "%s: out of space.\n", *argv);
 119                         exit(1);
 120                 }
 121                 (void)strcpy(LL, tgoto(CM, 0, 23));
 122         }
 123 #ifdef USG
 124         ioctl(1, TCGETA, &sg);
 125         ospeed = sg.c_cflag&CBAUD;
 126 #else
 127         gtty(1, &sg);
 128         ospeed = sg.sg_ospeed;
 129 #endif
 130         (void)signal(SIGHUP, onsig);
 131         (void)signal(SIGINT, onsig);
 132         (void)signal(SIGQUIT, onsig);
 133         (void)signal(SIGSTOP, onsig);
 134         (void)signal(SIGTSTP, onsig);
 135         (void)signal(SIGTERM, onsig);
 136 #ifdef USG
 137         ioctl(1, TCGETA, &old_tty);     /* save tty bits for exit */
 138         ioctl(1, TCGETA, &sg);
 139         sg.c_iflag &= ~ICRNL;
 140         sg.c_oflag &= ~ONLCR;
 141         sg.c_lflag &= ~ECHO;
 142         ioctl(1, TCSETAW, &sg);
 143 #else
 144         gtty(1, &old_tty);              /* save tty bits for exit */
 145         gtty(1, &sg);
 146         sg.sg_flags &= ~(CRMOD|ECHO);
 147         stty(1, &sg);
 148 #endif
 149         if (TI)
 150                 tputs(TI, 1, fputchar);
 151         tputs(tgetstr("cl", &tcp), 1, fputchar);
 152         (void)fflush(stdout);
 153         for (j = 4; j >= 0; --j) {
 154                 xpos[j] = random() % cols + 2;
 155                 ypos[j] = random() % lines + 2;
 156         }
 157         for (j = 0;;) {
 158                 x = random() % cols + 2;
 159                 y = random() % lines + 2;
 160                 cursor(x, y);
 161                 fputchar('.');
 162                 cursor(xpos[j], ypos[j]);
 163                 fputchar('o');
 164                 if (!j--)
 165                         j = 4;
 166                 cursor(xpos[j], ypos[j]);
 167                 fputchar('O');
 168                 if (!j--)
 169                         j = 4;
 170                 cursor(xpos[j], ypos[j] - 1);
 171                 fputchar('-');
 172                 tputs(DN, 1, fputchar);
 173                 tputs(BC, 1, fputchar);
 174                 tputs(BC, 1, fputchar);
 175                 fputs("|.|", stdout);
 176                 tputs(DN, 1, fputchar);
 177                 tputs(BC, 1, fputchar);
 178                 tputs(BC, 1, fputchar);
 179                 fputchar('-');
 180                 if (!j--)
 181                         j = 4;
 182                 cursor(xpos[j], ypos[j] - 2);
 183                 fputchar('-');
 184                 tputs(DN, 1, fputchar);
 185                 tputs(BC, 1, fputchar);
 186                 tputs(BC, 1, fputchar);
 187                 fputs("/ \\", stdout);
 188                 cursor(xpos[j] - 2, ypos[j]);
 189                 fputs("| O |", stdout);
 190                 cursor(xpos[j] - 1, ypos[j] + 1);
 191                 fputs("\\ /", stdout);
 192                 tputs(DN, 1, fputchar);
 193                 tputs(BC, 1, fputchar);
 194                 tputs(BC, 1, fputchar);
 195                 fputchar('-');
 196                 if (!j--)
 197                         j = 4;
 198                 cursor(xpos[j], ypos[j] - 2);
 199                 fputchar(' ');
 200                 tputs(DN, 1, fputchar);
 201                 tputs(BC, 1, fputchar);
 202                 tputs(BC, 1, fputchar);
 203                 fputchar(' ');
 204                 tputs(ND, 1, fputchar);
 205                 fputchar(' ');
 206                 cursor(xpos[j] - 2, ypos[j]);
 207                 fputchar(' ');
 208                 tputs(ND, 1, fputchar);
 209                 fputchar(' ');
 210                 tputs(ND, 1, fputchar);
 211                 fputchar(' ');
 212                 cursor(xpos[j] - 1, ypos[j] + 1);
 213                 fputchar(' ');
 214                 tputs(ND, 1, fputchar);
 215                 fputchar(' ');
 216                 tputs(DN, 1, fputchar);
 217                 tputs(BC, 1, fputchar);
 218                 tputs(BC, 1, fputchar);
 219                 fputchar(' ');
 220                 xpos[j] = x;
 221                 ypos[j] = y;
 222                 (void)fflush(stdout);
 223         }
 224 }
 225
 226 static void
 227 onsig()
 228 {
 229         tputs(LL, 1, fputchar);
 230         if (TE)
 231                 tputs(TE, 1, fputchar);
 232         (void)fflush(stdout);
 233 #ifdef USG
 234         ioctl(1, TCSETAW, &old_tty);
 235 #else
 236         stty(1, &old_tty);
 237 #endif
 238         exit(0);
 239 }
 240
 241 static void
 242 fputchar(c)
 243         char c;
 244 {
 245         putchar(c);
 246 }