ap_note_subprocess — register a subprocess for killing on pool destruction
void ap_note_subprocess(pool *p, int pid, enum kill_conditions how)
Registers a subprocess to be killed on pool
destruction. Exactly how it is killed
depends on how :
kill_never
Don’t kill the process or wait for it. This is normally used internally.
kill_after_timeout
Send the process a SIGTERM, wait three seconds,
send a SIGKILL, and wait for the process to die.
kill_always
Send the process a SIGKILL and wait for the
process to die.
just_wait
Don’t send the process any kind of kill.
kill_only_once
Send a SIGTERM, then wait.
Note that all three-second delays are carried out at once, rather than one after the other.