On Tue, 23 Jun 2020, Norman Wilson wrote:

> The only file-system switch I know well is that in the later Research
> systems.  It has nothing to do with disks or blocks. It is about names
> and inodes: turn name to struct inode, read arbitrary chunk of data,
> write arbitrary chunk of data, create file, unlink file, abominable
> ill-defined system call that just wouldn't die erm I mean ioctl, and so
> on.

Ioctl: the Swiss Army knife of system calls.  I thought it was a neat idea
when it arrived (much better then those primitive stty/gtty calls) but
now...

-- Dave