Re: [PATCH v2 0/5] pid: add pidfd_open()

[Florian Weimer]

* Daniel Colascione:

> But doesn't the CSIGNAL approach still require that libraries somehow
> coordinate which non-SIGCHLD signal they use? (Signal coordination a
> separate problem, unfortunately.)

There's already an allocation mechanism for realtime signals in glibc,
via __libc_allocate_rtsig.  I don't know what it is about: It's clearly
intended as an external interface, yet there isn't a declaration in any
installed header file.  ALSA has some optional code to use it, but I
don't think distributions compile ALSA in that way; it always uses SIGIO.

Thanks,
Florian