suse man page for strnlen_user

STRNLEN_USER(9) 					    Memory Management in Linux						   STRNLEN_USER(9)

NAME
       strnlen_user - Get the size of a string in user space.

SYNOPSIS
       long strnlen_user(const char __user * s, long n);

ARGUMENTS
       s
	   The string to measure.

       n
	   The maximum valid length

DESCRIPTION
       Get the size of a NUL-terminated string in user space.

       Returns the size of the string INCLUDING the terminating NUL. On exception, returns 0. If the string is too long, returns a value greater
       than n.

COPYRIGHT
Kernel Hackers Manual 2.6.					     July 2010							   STRNLEN_USER(9)