iofunc_utime_default()

Обработчик по умолчанию для сообщений _IO_UTIME

Прототип:

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

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_utime_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.

Библиотека:

libc

Описание:

The iofunc_utime_default() function implements POSIX semantics for the client's utime() call, which is received as an _IO_UTIME message by the resource manager.

You can place this function directly into the io_funcs table passed to resmgr_attach(), at the utime position, or you can call iofunc_func_init() to initialize all of the functions to their default values.

The iofunc_utime_default() function calls iofunc_utime() to do the actual work. It verifies that the client has the necessary permissions to effect a utime on the device. If so, the utime is performed, modifying elements of the ocb->attr structure. This function takes care of updating these bits in the flags member of ocb->attr:

IOFUNC_ATTR_ATIME

IOFUNC_ATTR_CTIME

IOFUNC_ATTR_MTIME

IOFUNC_ATTR_DIRTY_TIME

IOFUNC_ATTR_DIRTY_MODE

The iofunc_utime() function then calls iofunc_time_update() to update the appropriate time fields in ocb->attr.

Возвращаемое значение:

EOK

Успешное завершение.

EROFS

An attempt was made to utime a read-only filesystem.

EACCES

The client doesn't have permissions to do the operation.

EPERM

The group ID or owner ID didn't match.

Классификация:

ЗОСРВ «Нейтрино»

Точка остановки потока

Нет

Обработчик прерываний

Нет

Обработчик сигналов

Да

В потоке

Да

Тематические ссылки:

io_utime_t, iofunc_func_init(), iofunc_time_update(), iofunc_ocb_t, iofunc_utime(), resmgr_attach(), resmgr_context_t, resmgr_io_funcs_t, utime()

Предыдущий раздел: Описание API системной библиотеки