eio_fstatvfs

(PECL eio >= 0.0.1dev)

eio_fstatvfs — Get file system statistics

eio_fstatvfs(
    mixed $fd,
    int $pri,
    callable $callback,
    mixed $data = ?
): resource

eio_fstatvfs() returns file system statistics in result of callback.

fd

A file descriptor of a file within the mounted file system.

pri

请求的优先级：EIO_PRI_DEFAULT，EIO_PRI_MIN，EIO_PRI_MAX 或 null。如果是 null，pri 将设为 EIO_PRI_DEFAULT。

callback

callback 函数在请求完成时被调用。其应匹配一下原型：

void callback(mixed $data, int $result[, resource $req]);

data

Arbitrary variable passed to callback.

eio_fstatvfs() returns request resource on success, 或者在失败时返回 false.