How to take down a system to the point of requiring a newfs with one line of C (userland)

Dennis Melentyev dennis.melentyev at gmail.com
Mon Feb 18 14:09:54 UTC 2008


Dag-Erling: you win! Your's longer a couple of inches :)

Sorry, my hands runs in front of the loco...
Hope there are not much of *such* styled preprocessor code in FreeBSD?
It should be a plain suicide to fix a bug in it.

2008/2/18, Dag-Erling Smørgrav <des at des.no>:
> Dag-Erling Smørgrav <des at des.no> writes:
> > Purely in the interest of showing off, here is my version.  It is 81
> > bytes shorter than yours, it is valid C99 with POSIX extensions (yours
> > is not), and it produces 11,450 files in about 0.2% of the time yours
> > takes to produce 10,000.
> >
> > #include <unistd.h>
> > #define b(i,v) for(int v=48;v<127;++v){f[i]=v;
> > #define a(i) b(i,v##i)
> > int main(void){char f[5]={'/'};a(1)a(2)a(3)truncate(f,0);}}}}
>
> Two bugs:
>
> 1) I forgot to include the correct version of the code
>
> 2) the version I had created a few files with '/' in their names; this
>    slightly nastier creates 10,648 files with only letters.
>
> #include <unistd.h>
> #define b(i,v)for(int v=65;v<87;){i[f]=v++;
> #define a(i)b(i,v##i)
> int main(void){char f[4]={47};a(1)a(2)a(3)truncate(f,0);}}}}
>
> DES
> --
> Dag-Erling Smørgrav - des at des.no
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-- 
Dennis Melentyev


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