STRNCPY_FROM_USER(9) Memory Management in Linux STRNCPY_FROM_USER(9)
NAME
strncpy_from_user - Copy a NUL terminated string from userspace.
SYNOPSIS
long strncpy_from_user(char * dst, const char __user * src, long count);
ARGUMENTS
dst
Destination address, in kernel space. This buffer must be at least count bytes long.
src
Source address, in user space.
count
Maximum number of bytes to copy, including the trailing NUL.
DESCRIPTION
Copies a NUL-terminated string from userspace to kernel space.
On success, returns the length of the string (not including the trailing NUL).
If access to userspace fails, returns -EFAULT (some data may have been copied).
If count is smaller than the length of the string, copies count bytes and returns count.
COPYRIGHT
Kernel Hackers Manual 2.6. July 2010 STRNCPY_FROM_USER(9)
