__strncpy_from_user man page on Scientific

__strncpy_from_user man page on Scientific

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__STRNCPY_FROM_USER(9)	  Memory Management in Linux	__STRNCPY_FROM_USER(9)

NAME
       __strncpy_from_user - Copy a NUL terminated string from userspace, with
       less checking.

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. Caller
       must check the specified block with access_ok before calling this
       function.

       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.	 November 2013		__STRNCPY_FROM_USER(9)

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