iofunc_space_verify()

Выполнить проверки доступа для сообщения _IO_SPACE

Прототип:

#include <sys/iofunc.h>
                                       
int iofunc_space_verify( resmgr_context_t *ctp, 
                         io_space_t *msg, 
                         iofunc_ocb_t *ocb, 
                         int *nonblock ); 

Аргументы:

ctp

A pointer to a resmgr_context_t structure that the resource-manager library uses to pass context information between functions.

msg

A pointer to the io_space_t structure that contains the message that the resource manager received.

ocb

A pointer to the iofunc_ocb_t structure for the Open Control Block that was created when the client opened the resource.

nonblock

NULL, or a pointer to a location where the function can store a value that indicates whether or not the device is nonblocking:

• 0 — the client doesn't want to be blocked (i.e. O_NONBLOCK was set).
• ≠0 — the client wants to be blocked.

Библиотека:

libc

Описание:

The iofunc_space_verify() helper function checks the client's permission for an _IO_SPACE message.

Возвращаемое значение:

EBADF

The client doesn't have read access to this resource.

EISDIR

The resource is a directory.

EOK

The client has read access to this resource.

Классификация:

ЗОСРВ «Нейтрино»

Точка остановки потока

Нет

Обработчик прерываний

Нет

Обработчик сигналов

Да

В потоке

Да

Тематические ссылки:

io_space_t, iofunc_ocb_t, iofunc_open(), iofunc_write_default(), iofunc_write_verify(), resmgr_context_t

Предыдущий раздел: Описание API системной библиотеки