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__put_user
Langue: en
Version: June 2009 (debian - 07/07/09)
Section: 9 (Appels noyau Linux)
NAME
__put_user - Write a simple value into user space, with less checking.SYNOPSIS
- __put_user(x, ptr);
ARGUMENTS
x
- Value to copy to user space.
ptr
- Destination address, in user space.
CONTEXT
User context only. This function may sleep.
DESCRIPTION
This macro copies a single simple value from kernel space to user space. It supports simple types like char and int, but not larger data types like structures or arrays.
ptr must have pointer-to-simple-variable type, and x must be assignable to the result of dereferencing ptr.
Caller must check the pointer with access_ok before calling this function.
Returns zero on success, or -EFAULT on error.
COPYRIGHT
Contenus ©2006-2024 Benjamin Poulain
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