io_openfd_t

Структура, характеризующая сообщения менеджера ресурсов типа _IO_OPENFD

Прототип:

#include <sys/iofunc.h>
        
struct _io_openfd {
    uint16_t                type;
    uint16_t                combine_len;
    uint32_t                ioflag;
    uint16_t                sflag;
    uint16_t                xtype;
    struct _msg_info        info;
    uint32_t                reserved2;
    uint32_t                key;
};
        
typedef union {
    struct _io_openfd       i;
} io_openfd_t;

Описание:

Данная структура ассоциирована с сообщениями менеджера ресурсов типа _IO_OPENFD. Поле i определяет входящие данные (поступающие в менеджер ресурсов).

The i member is a structure of type _io_openfd that contains the following members:

type

_IO_OPENFD.

combine_len

If the message is a combine message, _IO_COMBINE_FLAG is set in this member.

ioflag

How the client wants to open the file; a combination of the following bits:

_IO_FLAG_RD

permit the file to be read.

_IO_FLAG_WR

permit the file to be written.

O_APPEND

cause each record that's written to be written at the end of the file.

O_TRUNC

if the file exists, truncate it to contain no data. This flag has no effect if the file doesn't exist.

sflag

How the client wants the file to be shared; a combination of the following bits:

SH_COMPAT

set compatibility mode.

SH_DENYRW

prevent read or write access to the file.

SH_DENYWR

prevent write access to the file.

SH_DENYRD

prevent read access to the file.

SH_DENYNO

permit both read and write access to the file.

xtype

Extended type information that can change the behavior of an I/O function. One of:

_IO_OPENFD_NONE

no extended type information.

_IO_OPENFD_PIPE

a pipe is being opened.

_IO_OPENFD_RESERVED

reserved

info

A pointer to a struct _msg_info that contains information about the message received by the resource manager.

key

Reserved for future use.

Классификация:

ЗОСРВ «Нейтрино»

Тематические ссылки:

resmgr_io_funcs_t, iofunc_openfd_default(), iofunc_openfd()

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