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()




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