Re: Adding pulse support to gpio(4), gpioctl(8)

[Mouse <mouse%Rodents-Montreal.ORG@localhost>]

>> Well, you need to open it first, before you can to ioctl, and if
>> only one process can open it, only one process can ioctl it, right?
> Wrong.

Agreed.

> Multiple threads can ioctl and nobody prevents one from having a
> single process with multiple threads (pthreads, if you like).

Not only that, but even without threading, there are at least two ways
I can think of offhand that a file descriptor, once opened, can end up
in multiple processes' open file tables: fork() and SCM_RIGHTS.  (There
are probably others, too.)

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