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cope with OS which don't fill in si_pid in siginfo

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Icinga processes check si_pid on IPC signals to ensure that the signal
comes from an expected process. OpenBSD doesn't currently fill in si_pid
in siginfo (leaving it 0) so signals never pass this check, resulting
in startup failing to complete (the worker doesn't see the umbrella's
signal and vice-versa) - issue #7505.

Relax the requirement so that either 0 or the wanted pid is accepted.
This commit is contained in:
Stuart Henderson 2020-01-07 22:08:38 +00:00
parent 84891a6795
commit 6744b1af54
1 changed files with 4 additions and 4 deletions
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8
lib/cli/daemoncommand.cpp
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@ -324,14 +324,14 @@ static void UmbrellaSignalHandler(int num, siginfo_t *info, void*)
break;
case SIGUSR2:
if (l_CurrentlyStartingUnixWorkerState.load() == UnixWorkerState::Pending
&& info->si_pid == l_CurrentlyStartingUnixWorkerPid.load()) {
&& (info->si_pid == 0 || info->si_pid == l_CurrentlyStartingUnixWorkerPid.load()) ) {
// The seemless worker currently being started by StartUnixWorker() successfully loaded its config
l_CurrentlyStartingUnixWorkerState.store(UnixWorkerState::LoadedConfig);
}
break;
case SIGCHLD:
if (l_CurrentlyStartingUnixWorkerState.load() == UnixWorkerState::Pending
&& info->si_pid == l_CurrentlyStartingUnixWorkerPid.load()) {
&& (info->si_pid == 0 || info->si_pid == l_CurrentlyStartingUnixWorkerPid.load()) ) {
// The seemless worker currently being started by StartUnixWorker() failed
l_CurrentlyStartingUnixWorkerState.store(UnixWorkerState::Failed);
}
@ -368,14 +368,14 @@ static void WorkerSignalHandler(int num, siginfo_t *info, void*)
{
switch (num) {
case SIGUSR2:
if (info->si_pid == l_UmbrellaPid) {
if (info->si_pid == 0 || info->si_pid == l_UmbrellaPid) {
// The umbrella process allowed us to continue working beyond config validation
l_AllowedToWork.store(true);
}
break;
case SIGINT:
case SIGTERM:
if (info->si_pid == l_UmbrellaPid) {
if (info->si_pid == 0 || info->si_pid == l_UmbrellaPid) {
// The umbrella process requested our termination
Application::RequestShutdown();
}