full-disclosure - Re: [FD] Evidence of a ISC being hacked?

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From: full-disclosure at arago.de (Thomas Binder)
Subject: Re: [FD] Evidence of a ISC being hacked?

Hi!

On Thu, Jun 24, 2004 at 03:38:27PM -0400, Valdis.Kletnieks@...edu wrote:
> 1) The wrapper/define/handwaving discards it and prays.
> 
> 2) The replacement function does a proper job of doing a full enough
> emulation of vsnprintf to keep track of "length so far" and stop
> when it gets full (not as easy as you might think - for fun, compute
> how many bytes this takes:

3) Only useable on systems with /dev/null: fopen() /dev/null,
   vfprintf() to that handle and take the return value - it
   contains the number of characters written (or -1 on error).
   Then malloc() a temporary buffer to hold the complete output,
   vsprintf() to it and strncpy() to the destination array.

Of course, this might not be a suitable solution in a performance
sensitive application, but it's only a workaround for a missing
function anyway.

Ciao

Thomas
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