Inserting arbitrary messages into strace output

[Justin Dearing]

On Thu, Dec 18, 2014 at 11:04 PM, Dmitry V. Levin <ldv at altlinux.org> wrote:

>
> Unlike -42, which is treated as unsigned int (i.e. 2^32-42) by the kernel,
> -1 is never a valid file descriptor.
>
Ok that makes sense. So how about a command line switch that specifically
intercepts write (-1, msg)  and print out the entire contents of msg,
regardless of the formatting of the rest of the output?

>
> BTW, should we change printfd() to print the file descriptor (when it's not
> equal to -1) using %u format instead of %d?
>
> That makes sense to me.
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