resize(to:retryOnInterrupt:)

Declaration

func resize(to newSize: Int64, retryOnInterrupt: Bool = true) throws

Parameters

• newSize:

  The length in bytes to resize the file to.

• retryOnInterrupt:

  Whether to retry the write operation if it throws Interrupted. The default is true. Pass false to try only once and throw an error upon interruption.

Discussion

The file referenced by this file descriptor will by truncated (or extended) to newSize.

If the current size of the file exceeds newSize, any extra data is discarded. If the current size of the file is smaller than newSize, the file is extended and filled with zeros to the provided size.

This function requires that the file has been opened for writing.

The corresponding C function is ftruncate.