COPY_TO_USER(9) Memory Management in Linux COPY_TO_USER(9)
NAME copy_to_user - Copy a block of data into user space.
SYNOPSIS unsigned long copy_to_user(void __user * to, const void * from, unsigned long n);
ARGUMENTS to Destination address, in user space.
from Source address, in kernel space.
n Number of bytes to copy.
CONTEXT User context only. This function may sleep.
DESCRIPTION Copy data from kernel space to user space.
Returns number of bytes that could not be copied. On success, this will be zero.
COPYRIGHT Kernel Hackers Manual 2.6. July 2015 COPY_TO_USER(9)