eio_fallocate

(PECL eio >= 0.0.1dev)

eio_fallocate — Allows the caller to directly manipulate the allocated disk space for a file

说锟斤拷

eio_fallocate ( mixed $fd , int $mode , int $offset , int $length [, int $pri = EIO_PRI_DEFAULT [, callable $callback = NULL [, mixed $data = NULL ]]] ) : resource

eio_fallocate() 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

锟斤拷锟斤拷

fd

Stream, Socket resource, or numeric file descriptor, e.g. returned by eio_open().

mode

Currently only one flag is supported for mode: EIO_FALLOC_FL_KEEP_SIZE (the same as POSIX constant FALLOC_FL_KEEP_SIZE).

offset

Specifies start of the byte range.

length

Specifies length the byte range.

pri

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callback

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

data: 锟斤拷锟捷革拷锟斤拷锟斤拷锟斤拷没锟斤拷锟斤拷荨锟�
result: 锟斤拷锟斤拷锟斤拷锟侥斤拷锟斤拷锟街碉拷锟酵拷锟斤拷锟斤拷锟接︼拷锟较低筹拷锟斤拷梅锟斤拷氐锟街碉拷锟�
req: 锟斤拷选锟斤拷锟斤拷锟斤拷锟斤拷源锟斤拷锟缴憋拷 eio_get_last_error() 之锟斤拷暮锟斤拷锟绞癸拷谩锟�

data

Arbitrary variable passed to callback.

锟斤拷锟斤拷值

eio_fallocate() returns request resource on success or FALSE on error.