init(forUpdating:)
Returns a file handle initialized for reading and writing to the file, device, or named socket at the specified URL.
Declaration
convenience init(forUpdating url: URL) throwsParameters
- url:
The URL of the file, device, or named socket to access.
Return Value
The initialized file handle object or nil if no file exists at url.
Discussion
The file pointer is set to the beginning of the file. The returned object responds to both read and write(_:) messages.
When using this method to create a file handle object, the file handle owns its associated file descriptor and is responsible for closing it.