On Wed, 26 Nov 2014 17:06:21 +0300
Dan Carpenter <[email protected]> wrote:
> This check says "goto out;" if we had to truncate the string.
>
> The "tbuffer" buffer has TRACE_BUF_SIZE bytes. The vsnprintf() function
> returns the number of characters (not counting the NUL char) which would
> have been printed if there were space. If we we tried to print
> TRACE_BUF_SIZE characters, the last character would have been truncated
> to make space for the NUL character so we should "goto out;".
>
Oh, and the NUL character is never copied. We copy the string into the
buffer with:
memcpy(&entry->buf, tbuffer, len);
Where len does not include NUL, and why we add it ourselves.
-- Steve
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