Re: Play Kernel Hangman!

From: Leen Besselink (leen@wirehub.nl)
Date: Mon Nov 06 2000 - 14:18:50 EST


On Mon, 6 Nov 2000, Jeff Dike wrote:

> After a stranger than usual late-night #kernelnewbies session on Thursday, I
> was inspired to come up with Kernel Hangman. This is the traditional game of
> hangman, except that the words you have to guess are kernel symbols.
>
> So, test your knowledge of kernel trivia and play it at
> http://user-mode-linux.sourceforge.net/cgi-bin/hangman
>
> Jeff

Actually, OpenBSD already has this (in the kernel !) After a kernel crash
ones, I got in the kerneldebugger. I didn't really know how to use it, but
I could play hangman. I just downloaded the source
(pub/OpenBSD/2.7/srcsys.tar.gz) to be sure, here is a short excerpt from
sys/ddb/db_hangman.c:

---
static __inline char *
db_randomsym(lenp)
        size_t  *lenp;
{
        register char   *p, *q;
                /* choose random symtab */
        register db_symtab_t    stab = db_istab(db_random(db_nsymtabs));

/* choose random symbol from the table */ q = db_qualify(X_db_isym(stab, db_random(X_db_nsyms(stab))),stab->name);

/* don't show symtab name if there are less than 3 of 'em */ if (db_nsymtabs < 3) while(*q++ != ':');

/* strlen(q) && ignoring underscores and colons */ for ((*lenp) = 0, p = q; *p; p++) if (ISALPHA(*p)) (*lenp)++;

return q; }

static char hangpic[]= "\n88888 \r\n" "9 7 6 \r\n" "97 5 \r\n" "9 423\r\n" "9 2 \r\n" "9 1 0\r\n" "9\r\n" "9 "; static char substchar[]="\\/|\\/O|/-|";

--- and an other part: ---

void db_hangman(addr, haddr, count, modif) db_expr_t addr; int haddr; db_expr_t count; char *modif; { if (modif[0] == 's' && '0' <= modif[1] && modif[1] <= '9') skill = modif[1] - '0'; else skill = 5;

while (db_hangon()); }

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