2be6d318c1
XXX: The signal handling "fix" for worm(6) is wrong. However, the functions themselves are wrong as well: See sigaction(2).
333 lines
6.5 KiB
C
333 lines
6.5 KiB
C
/*
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* Copyright (c) 1980, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1980, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)worm.c 8.1 (Berkeley) 5/31/93";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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/*
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* Worm. Written by Michael Toy
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* UCSC
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*/
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#include <ctype.h>
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#include <curses.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <termios.h>
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#include <unistd.h>
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#define newlink() (struct body *) malloc(sizeof (struct body));
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#define HEAD '@'
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#define BODY 'o'
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#define LENGTH 7
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#define RUNLEN 8
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#define CNTRL(p) (p-'A'+1)
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#if 0
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#ifndef baudrate
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# define baudrate() _tty.sg_ospeed
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#endif
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#endif
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WINDOW *tv;
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WINDOW *stw;
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struct body {
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int x;
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int y;
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struct body *prev;
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struct body *next;
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} *head, *tail, goody;
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int growing = 0;
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int running = 0;
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int slow = 0;
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int score = 0;
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int start_len = LENGTH;
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char lastch;
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char outbuf[BUFSIZ];
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void crash __P((void));
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void display __P((struct body *, char));
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void leave __P((int));
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void life __P((void));
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void newpos __P((struct body *));
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void prize __P((void));
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void process __P((char));
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long rnd __P((int));
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void setup __P((void));
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void suspend __P((int));
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void wake __P((int));
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int
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main(argc, argv)
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int argc;
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char **argv;
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{
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char ch;
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/* revoke */
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setgid(getgid());
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if (argc == 2)
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start_len = atoi(argv[1]);
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if ((start_len <= 0) || (start_len > 500))
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start_len = LENGTH;
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setbuf(stdout, outbuf);
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srandomdev();
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signal(SIGALRM, wake);
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signal(SIGINT, leave);
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signal(SIGQUIT, leave);
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signal(SIGTSTP, suspend); /* process control signal */
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initscr();
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crmode();
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noecho();
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slow = (baudrate() <= B1200);
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clear();
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stw = newwin(1, COLS-1, 0, 0);
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tv = newwin(LINES-1, COLS-1, 1, 0);
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box(tv, '*', '*');
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scrollok(tv, FALSE);
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scrollok(stw, FALSE);
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wmove(stw, 0, 0);
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wprintw(stw, " Worm");
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refresh();
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wrefresh(stw);
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wrefresh(tv);
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life(); /* Create the worm */
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prize(); /* Put up a goal */
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while(1)
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{
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if (running)
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{
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running--;
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process(lastch);
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}
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else
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{
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fflush(stdout);
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if (read(0, &ch, 1) >= 0)
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process(ch);
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}
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}
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}
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void
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life()
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{
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struct body *bp, *np;
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int i;
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np = NULL;
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head = newlink();
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head->x = start_len+2;
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head->y = 12;
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head->next = NULL;
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display(head, HEAD);
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for (i = 0, bp = head; i < start_len; i++, bp = np) {
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np = newlink();
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np->next = bp;
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bp->prev = np;
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np->x = bp->x - 1;
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np->y = bp->y;
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display(np, BODY);
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}
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tail = np;
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tail->prev = NULL;
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}
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void
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display(pos, chr)
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struct body *pos;
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char chr;
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{
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wmove(tv, pos->y, pos->x);
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waddch(tv, chr);
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}
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void
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leave(sig)
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int sig;
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{
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endwin();
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exit(0);
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}
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void
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wake(sig)
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int sig;
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{
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signal(SIGALRM, wake);
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fflush(stdout);
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process(lastch);
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}
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long
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rnd(range)
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{
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return random() % range;
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}
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void
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newpos(bp)
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struct body * bp;
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{
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do {
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bp->y = rnd(LINES-3)+ 2;
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bp->x = rnd(COLS-3) + 1;
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wmove(tv, bp->y, bp->x);
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} while(winch(tv) != ' ');
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}
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void
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prize()
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{
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int value;
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value = rnd(9) + 1;
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newpos(&goody);
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waddch(tv, value+'0');
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wrefresh(tv);
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}
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void
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process(ch)
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char ch;
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{
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int x,y;
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struct body *nh;
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alarm(0);
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x = head->x;
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y = head->y;
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switch(ch)
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{
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case 'h': x--; break;
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case 'j': y++; break;
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case 'k': y--; break;
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case 'l': x++; break;
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case 'H': x--; running = RUNLEN; ch = tolower(ch); break;
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case 'J': y++; running = RUNLEN/2; ch = tolower(ch); break;
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case 'K': y--; running = RUNLEN/2; ch = tolower(ch); break;
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case 'L': x++; running = RUNLEN; ch = tolower(ch); break;
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case '\f': setup(); return;
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case CNTRL('Z'): suspend(0); return;
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case CNTRL('C'): crash(); return;
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case CNTRL('D'): crash(); return;
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default: if (! running) alarm(1);
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return;
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}
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lastch = ch;
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if (growing == 0)
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{
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display(tail, ' ');
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tail->next->prev = NULL;
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nh = tail->next;
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free(tail);
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tail = nh;
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}
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else growing--;
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display(head, BODY);
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wmove(tv, y, x);
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if (isdigit(ch = winch(tv)))
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{
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growing += ch-'0';
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prize();
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score += growing;
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running = 0;
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wmove(stw, 0, 68);
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wprintw(stw, "Score: %3d", score);
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wrefresh(stw);
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}
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else if(ch != ' ') crash();
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nh = newlink();
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nh->next = NULL;
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nh->prev = head;
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head->next = nh;
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nh->y = y;
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nh->x = x;
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display(nh, HEAD);
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head = nh;
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if (!(slow && running))
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wrefresh(tv);
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if (!running)
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alarm(1);
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}
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void
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crash()
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{
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sleep(2);
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clear();
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move(23, 0);
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refresh();
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printf("Well, you ran into something and the game is over.\n");
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printf("Your final score was %d\n", score);
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leave(0);
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}
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void
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suspend(sig)
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int sig;
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{
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move(LINES-1, 0);
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refresh();
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endwin();
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fflush(stdout);
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kill(getpid(), SIGTSTP);
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signal(SIGTSTP, suspend);
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crmode();
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noecho();
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setup();
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}
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void
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setup()
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{
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clear();
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refresh();
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touchwin(stw);
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wrefresh(stw);
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touchwin(tv);
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wrefresh(tv);
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alarm(1);
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}
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