BUG/MINOR: systemd: ensure we don't miss signals
There's a race condition in the systemd wrapper. People who restart it
too fast report old processes remaining there. Here if the signal is
caught before entering the "while" loop we block indefinitely on the
wait() call. Let's check the caught signal before calling wait(). It
doesn't completely close the race, a window still exists between the
test of the flag and the call to wait(), but it's much smaller. A
safer solution could involve pselect() to wait for the signal
delivery.
(cherry picked from commit 1ab5e8642a3537006db8eeed4a3b1bdca2458b33)
(cherry picked from commit 81b394f75eab23044e0729dd9386bf860481ee3a)
1 file changed