root/games/atc/main.c
/*      $OpenBSD: main.c,v 1.33 2024/08/23 14:50:16 deraadt Exp $       */
/*      $NetBSD: main.c,v 1.4 1995/04/27 21:22:25 mycroft Exp $ */

/*-
 * Copyright (c) 1990, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Ed James.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

/*
 * Copyright (c) 1987 by Ed James, UC Berkeley.  All rights reserved.
 *
 * Copy permission is hereby granted provided that this notice is
 * retained on all partial or complete copies.
 *
 * For more info on this and all of my stuff, mail edjames@berkeley.edu.
 */

#include <err.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <time.h>
#include <unistd.h>

#include "extern.h"
#include "pathnames.h"

int
main(int argc, char *argv[])
{
        int                     ch;
        int                     f_usage = 0, f_list = 0, f_showscore = 0;
        int                     f_printpath = 0;
        const char              *file = NULL;
        char                    *seed;
        struct sigaction        sa;
        struct itimerval        itv;

        open_score_file();

        start_time = time(0);
        makenoise = 1;
        seed = NULL;

        while ((ch = getopt(argc, argv, "f:g:hlpqr:st")) != -1) {
                switch (ch) {
                case 'f':
                case 'g':
                        file = optarg;
                        break;
                case 'l':
                        f_list = 1;
                        break;
                case 'p':
                        f_printpath = 1;
                        break;
                case 'q':
                        makenoise = 0;
                        break;
                case 'r':
                        seed = optarg;
                        break;
                case 's':
                case 't':
                        f_showscore = 1;
                        break;
                case 'h':
                default:
                        f_usage = 1;
                        break;
                }
        }
        argc -= optind;
        argv += optind;

        if (argc > 0)
                f_usage = 1;

        if (seed != NULL)
                setseed(seed);

        if (f_usage)
                fprintf(stderr, 
                    "usage: %s [-lpqst] [-f game] [-g game] [-r seed]\n",
                    getprogname());
        if (f_showscore)
                log_score(1);
        if (f_list)
                list_games();
        if (f_printpath) {
                size_t  len;
                char    buf[256];

                strlcpy(buf, _PATH_GAMES, sizeof buf);
                len = strlen(buf);
                if (len != 0 && buf[len - 1] == '/')
                        buf[len - 1] = '\0';
                puts(buf);
        }
                
        if (f_usage || f_showscore || f_list || f_printpath)
                return 0;

        if (file == NULL)
                file = default_game();
        else
                file = okay_game(file);

        if (file == NULL || read_file(file) < 0)
                return 1;

        setup_screen(sp);

        if (pledge("stdio rpath wpath cpath flock tty", NULL) == -1)
                err(1, "pledge");

        addplane();

        signal(SIGINT, quit);
        signal(SIGQUIT, quit);
        signal(SIGTSTP, SIG_IGN);
        signal(SIGSTOP, SIG_IGN);
        signal(SIGHUP, log_score_quit);
        signal(SIGTERM, log_score_quit);

        tcgetattr(fileno(stdin), &tty_start);
        tty_new = tty_start;
        tty_new.c_lflag &= ~(ICANON|ECHO);
        tty_new.c_iflag |= ICRNL;
        tty_new.c_cc[VMIN] = 1;
        tty_new.c_cc[VTIME] = 0;
        tcsetattr(fileno(stdin), TCSADRAIN, &tty_new);

        memset(&sa, 0, sizeof sa);
        sa.sa_handler = update;
        sigemptyset(&sa.sa_mask);
        sigaddset(&sa.sa_mask, SIGALRM);
        sigaddset(&sa.sa_mask, SIGINT);
        sa.sa_flags = 0;
        sigaction(SIGALRM, &sa, (struct sigaction *)0);

        itv.it_value.tv_sec = 0;
        itv.it_value.tv_usec = 1;
        itv.it_interval.tv_sec = sp->update_secs;
        itv.it_interval.tv_usec = 0;
        setitimer(ITIMER_REAL, &itv, NULL);

        for (;;) {
                if (getcommand() != 1)
                        planewin();
                else {
                        itv.it_value.tv_sec = 0;
                        itv.it_value.tv_usec = 0;
                        setitimer(ITIMER_REAL, &itv, NULL);

                        update(0);

                        itv.it_value.tv_sec = sp->update_secs;
                        itv.it_value.tv_usec = 0;
                        itv.it_interval.tv_sec = sp->update_secs;
                        itv.it_interval.tv_usec = 0;
                        setitimer(ITIMER_REAL, &itv, NULL);
                }
        }
}

int
read_file(const char *s)
{
        extern FILE     *yyin;
        int             retval;

        file = s;
        yyin = fopen(s, "r");
        if (yyin == NULL) {
                warn("fopen %s", s);
                return (-1);
        }
        retval = yyparse();
        fclose(yyin);

        if (retval != 0)
                return (-1);
        else
                return (0);
}

const char      *
default_game(void)
{
        FILE            *fp;
        static char     file[256];
        char            line[256], games[256], *p;

        strlcpy(games, _PATH_GAMES, sizeof games);
        strlcat(games, GAMES, sizeof games);

        if ((fp = fopen(games, "r")) == NULL) {
                warn("fopen %s", games);
                return (NULL);
        }
        do {
                if (fgets(line, sizeof(line), fp) == NULL) {
                        warnx("%s: no default game available", games);
                        fclose(fp);
                        return (NULL);
                }
                line[strcspn(line, "\n")] = '\0';
                p = strrchr(line, '#');
                if (p)
                        *p = '\0';
        } while (line[0] == '\0');
        fclose(fp);

        if (strlen(line) + strlen(_PATH_GAMES) >= sizeof(file)) {
                warnx("default game name too long");
                return (NULL);
        }
        strlcpy(file, _PATH_GAMES, sizeof file);
        strlcat(file, line, sizeof file);
        return (file);
}

const char      *
okay_game(const char *s)
{
        FILE            *fp;
        static char     file[256];
        const char      *ret = NULL;
        char            line[256], games[256], *p;

        strlcpy(games, _PATH_GAMES, sizeof games);
        strlcat(games, GAMES, sizeof games);

        if ((fp = fopen(games, "r")) == NULL) {
                warn("fopen %s", games);
                return (NULL);
        }
        while (fgets(line, sizeof(line), fp) != NULL) {
                line[strcspn(line, "\n")] = '\0';
                p = strrchr(line, '#');
                if (p)
                        *p = '\0';
                if (strcmp(s, line) == 0) {
                        if (strlen(line) + strlen(_PATH_GAMES) >= sizeof(file)) {
                                warnx("game name too long");
                                return (NULL);
                        }
                        strlcpy(file, _PATH_GAMES, sizeof file);
                        strlcat(file, line, sizeof file);
                        ret = file;
                        break;
                }
        }
        fclose(fp);
        if (ret == NULL) {
                test_mode = 1;
                ret = s;
                fprintf(stderr, "%s: %s: game not found\n", games, s);
                fprintf(stderr, "Your score will not be logged.\n");
                sleep(2);       /* give the guy time to read it */
        }
        return (ret);
}

int
list_games(void)
{
        FILE            *fp;
        char            line[256], games[256], *p;
        int             num_games = 0;

        strlcpy(games, _PATH_GAMES, sizeof games);
        strlcat(games, GAMES, sizeof games);

        if ((fp = fopen(games, "r")) == NULL) {
                warn("fopen %s", games);
                return (-1);
        }
        puts("available games:");
        while (fgets(line, sizeof(line), fp) != NULL) {
                line[strcspn(line, "\n")] = '\0';
                p = strrchr(line, '#');
                if (p)
                        *p = '\0';
                if (line[0] == '\0')
                        continue;
                printf("        %s\n", line);
                num_games++;
        }
        fclose(fp);
        if (num_games == 0) {
                fprintf(stderr, "%s: no games available\n", games);
                return (-1);
        }
        return (0);
}