On Mon, Oct 8, 2012 at 10:22 PM, naveen yadav <yad.naveen@xxxxxxxxx> wrote:
>
> I want to control the print message being sent to stdout and stderr
> using printf(), vprintf() and fprintf() function call for better
> performance.
>
> For this I have added following code in vfprintf() function
> static int Verbose = 0;
> if(stream == stdout || stream == stderr)
> {
> if (Verbose == 0)
> Verbose = getenv ("PRINT") ? 1 : 2;
> if (Verbose == 1)
> return 0;
> }
That seems really unwise. Do this kind of thing in your application,
not in your C library. If for some reason you truly must do it in
your C library, do it at level of write, not at the level of printf.
Ian
