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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.

Quand le mal est certain,
La plainte ni la peur ne changent le destin.
-+- Jean de La Fontaine (1621-1695),
Le Cochon, la Chèvre et le Mouton (Fable VIII.12) -+-