kcheckpass: Add support in for non-Linux platforms via kevent.
Summary:
- signalfd() is a Linux specific api: SIGNALFD(2): ` CONFORMING TO top
signalfd() and signalfd4() are Linux-specific. ` - FreeBSD and OSX and others can use the widely available kevent/kqueue api for a similar effect.
We let the kernel notify us via kevent() [1], if there is a SIGUSR1 or SIGUSR2, and then fetch the signal using sigwaitinfo() [2].
[1] https://www.freebsd.org/cgi/man.cgi?query=kqueue&sektion=2
[2] https://www.freebsd.org/cgi/man.cgi?query=sigwaitinfo&sektion=2
This seems to work fine on FreeBSD.
Reviewers: FreeBSD, graesslin
Subscribers: plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D5825