an offset, in bytes, which is added to the position specified by type
the position in the file, which can be G_SEEK_CUR (the current position), G_SEEK_SET (the start of the file), or G_SEEK_END (the end of the file)
G_IO_ERROR_NONE if the operation was successful.
Deprecated: Use glib.iochannel.IOChannel.seekPosition instead.
Sets the current position in the #GIOChannel, similar to the standard library function fseek().