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dio_fcntl
Popis
mixed dio_fcntl ( resource fd, int cmd [, mixed args] )
The dio_fcntl() function performs the
operation specified by cmd
on the file
descriptor fd
. Some commands require
additional arguments args
to be supplied.
Poznámka: Tato funkce nenà implementována na platformách Windows.
Seznam parametrů
fd
The file descriptor returned by dio_open().
cmd
Can be one of the following operations:
F_SETLK - Lock is set or cleared. If the lock is held by someone else dio_fcntl() returns -1.
F_SETLKW - like F_SETLK, but in case the lock is held by someone else, dio_fcntl() waits until the lock is released.
F_GETLK - dio_fcntl() returns an associative array (as described above) if someone else prevents lock. If there is no obstruction key "type" will set to F_UNLCK.
F_DUPFD - finds the lowest numbered available file descriptor greater than or equal to
args
and returns them.F_SETFL - Sets the file descriptors flags to the value specified by
args
, which can be O_APPEND, O_NONBLOCK or O_ASYNC. To use O_ASYNC you will need to use the PCNTL extension.
args
args
is an associative array, whencmd
is F_SETLK or F_SETLLW, with the following keys:"start" - offset where lock begins
"length" - size of locked area. zero means to end of file
"wenth" - Where l_start is relative to: can be SEEK_SET, SEEK_END and SEEK_CUR
"type" - type of lock: can be F_RDLCK (read lock), F_WRLCK (write lock) or F_UNLCK (unlock)
PÅ™Ãklady
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dio_close | Nahoru |