usr/src/games/zork.c

#include <stdio.h>
/*
 * Dungeon - open UP dungeon
 */

#ifdef CHECKUID
int users[] = {
        522,    /* sa */
        164,    /* Leiby */
        229,    /* richards */
        264,    /* marshall */
        1099,   /* wizard */
        425,    /* clm */
        15,     /* mowle */
        32,     /* ghg */
        27,     /* qtip (zager) */
        530,    /* mike */
        16,     /* bc */
        333,    /* pdh */
        230,    /* wa1yyn */
        19,     /* joe
        43,     /* bruner */
        308,    /* gedeon (watch him closely!) */
        429,    /* mayhew */
        743,    /* alicia */
        367,    /* feather */
        85,     /* clark bar */
        382,    /* malcolm */
        99,     /* jones */
        636,    /* gfg */
        0 };
#endif

main()
{

        register int *up;
        register uid;
        int fd3, fd4, fd5;

#ifdef CHECKUID

        uid = getuid();
        for (up=users; *up; up++)
                if (*up == uid)
                        goto ok;
        printf("You are not a Wizard!\n");
        exit();
#endif
        /*
         * open up files needed by program
         * look in current directory first, then try default names
         * The following files must be as follows:
         * "dtext.dat" open read-only on fd 3
         * "dindex.dat open read-only on fd 4 (maybe this file isn't used)
         * "doverlay" open read-only on fd 5 (put this file on fast disk)
         */
        close(3);
        close(4);
        close(5);
        if ((fd3 = open("dtext.dat", 0)) < 0)
                if ((fd3 = open("/usr/games/lib/dtext.dat", 0)) < 0)
                        error("Can't open dtext.dat\n");

        if ((fd4 = open("dindex.dat", 0)) < 0)
                if ((fd4 = open("/usr/games/lib/dindex.dat", 0)) < 0)
                        error("Can' open dindex.dat\n");

        if ((fd5 = open("doverlay", 0)) < 0)
                if ((fd5 = open("/tmp/nedtmp/doverlay", 0)) < 0)
                        if ((fd5 = open("/usr/games/lib/doverlay", 0)) < 0)
                                error("Can't open doverlay\n");

        if (fd3 != 3 || fd4 != 4 || fd5 != 5)
                error("Files opened on wrong descriptors\n");

        signal(2,1);

        printf("You are in an open field west of a big white house with a boarded\n");
        printf("front door.\n");
        printf("There is a small mailbox here.\n>");
        fflush(stdout);
#ifdef pdp11
        execl("dungeon","zork", 0);
        execl("/usr/games/lib/dungeon","zork", 0);
#else
        if( (uid=open("dungeon", 0)) > 0 ) {
                close(uid);
                execlp("compat", "zork", "dungeon", 0);
                execlp("/usr/games/lib/compat", "zork", "dungeon", 0);
        }
        execlp("compat", "zork", "/usr/games/lib/dungeon", 0);
        execlp("/usr/games/lib/compat", "zork", "/usr/games/lib/dungeon", 0);
#endif
        printf("Can't start dungeons.\n");
        exit(0);
}
error(s)
char *s;
{
        printf("%s", s);
        exit(1);
}