Re: Async IO

. Tethys (
Thu, 30 Jan 1997 11:12:25 +0000

>We probably should create a couple of more signals... SIGUNUSED (31)
>is still available, SIGLOST (29) is commented out, signal number 0 is
>unused, and SIGPWR (30) basically only makes sense to init(8). I
>would suggest creating a SIGTHREAD reserved for Linuxthreads; that way
>it wouldn't have to eat up a user signal...

Signal 0 is not unused. It is traditionally used to "ping" a process.
If you send a process signal 0, you can see if it's alive by checking
the return code.

I would agree with the creation of a SIGTHREAD, though.


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