3 ms·
> Maybe it was only used as the `all in progress group` sentinel because it was used by the kernel Ah, but for that we have to long beyond/before Linux. kill(0
by kazinator 2y ago
> Maybe it was only used as the `all in progress group` sentinel because it was used by the kernel
Ah, but for that we have to long beyond/before Linux. kill(0, signal) existed before a line of Linux was written.
Linux followed the existing POSIX spec which gave it PID 0 to do whatever.