File.replaceReadwrite

Returns an output stream for overwriting the file in readwrite mode, possibly creating a backup copy of the file first. If the file doesn't exist, it will be created.

For details about the behaviour, see gio.file.File.replace which does the same thing but returns an output stream only.

Note that in many non-local file cases read and write streams are not supported, so make sure you really need to do read and write streaming, rather than just opening for reading or writing.

Parameters

etag string

an optional entity tag for the current #GFile, or #NULL to ignore

makeBackup bool

true if a backup should be created

flags gio.types.FileCreateFlags

a set of #GFileCreateFlags

cancellable gio.cancellable.Cancellable

optional #GCancellable object, null to ignore

Return Value

Type: gio.file_iostream.FileIOStream

a #GFileIOStream or null on error. Free the returned object with gobject.object.ObjectG.unref.