Howdy,

I'm writing a character driver and am getting some wierd behavior from the command sprintf. Here is the basic code.

----------------------------------------------------------------------
ssize_t driver_read (struct file *filp, char *buf, size_t count, loff_t *ppos) {
int bytes = 0;
char output[256];
int myint = 12;
float myfloat = 1.234567;

bytes = sprintf(output, "int = %i float = %f \n", myint, myfloat);

copy_user (buf, &output, bytes);

return bytes;
}
-----------------------------------------------------------------------


The output to this is

int = 12 float = %f


Does anyone know why floats are not working for sprintf?

cheers
Rich

i donno but im lookin at the vsnprintf source [ /usr/src/linux/lib/vsprintf.c] and there is NO conversion available for printing floating point numbers. there is no e, f, or g ??? anyone else?

found this:printk uses vsprintf so apparently u can't print floating point numbers. taht is rather retarded. i wonder how hard it would be to add?? i shall see