EIO_FALLOCATE(3) 1 EIO_FALLOCATE(3)
eio_fallocate - Allows the caller to directly manipulate the allocated disk space for a file
SYNOPSIS
resource eio_fallocate (mixed $fd, int $mode, int $offset, int $length, [int $pri = EIO_PRI_DEFAULT], [callable $callback = NULL],
[mixed $data = NULL])
DESCRIPTION
eio_fallocate(3) allows the caller to directly manipulate the allocated disk space for the file specified by $fd file descriptor for the
byte range starting at $offset and continuing for $length bytes.
Note
File should be opened for writing
EIO_O_CREAT should be logically OR'd with EIO_O_WRONLY, or EIO_O_RDWR
PARAMETERS
o $fd
- Stream, Socket resource, or numeric file descriptor, e.g. returned by eio_open(3).
o $mode
-Currently only one flag is supported for mode: EIO_FALLOC_FL_KEEP_SIZE (the same as POSIX constant FALLOC_FL_KEEP_SIZE).
o $offset
- Specifies start of the byte range.
o $length
- Specifies length the byte range.
o $pri
-The request priority: EIO_PRI_DEFAULT, EIO_PRI_MIN, EIO_PRI_MAX, or NULL. If NULL passed, $pri internally is set to
EIO_PRI_DEFAULT.
o $callback
-$callback function is called when the request is done. It should match the following prototype:
void callback(mixed $data, int $result[, resource $req]);
o $data
-is custom data passed to the request.
o $result
-request-specific result value; basically, the value returned by corresponding system call.
o $req
-is optional request resource which can be used with functions like eio_get_last_error(3)
o $data
- Arbitrary variable passed to $callback.
RETURN VALUES
eio_fallocate(3) returns request resource on success or FALSE on error.
PHP Documentation Group EIO_FALLOCATE(3)
