I don't think that's what the parent was complaining about, it was more about handling signals correctly. It's incredibly easy to write buggy signal handlers on a Linux system. The "self-pipe" trick[1], and later, signalfd(2) have made signal handling much easier, but a lot of programs still do it the old way.

[1]: http://cr.yp.to/docs/selfpipe.html [2]: http://man7.org/linux/man-pages/man2/signalfd.2.html