diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/event/SignalMonitor.cxx | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/src/event/SignalMonitor.cxx b/src/event/SignalMonitor.cxx index a845030c4..2d8fe681f 100644 --- a/src/event/SignalMonitor.cxx +++ b/src/event/SignalMonitor.cxx @@ -39,6 +39,10 @@ #include <algorithm> +#ifdef USE_SIGNALFD +#include <pthread.h> +#endif + #include <assert.h> #include <signal.h> @@ -94,7 +98,21 @@ static std::atomic_bool signal_pending[MAX_SIGNAL]; static Manual<SignalMonitor> monitor; -#ifndef USE_SIGNALFD +#ifdef USE_SIGNALFD + +/** + * This is a pthread_atfork() callback that unblocks the signals that + * were blocked for our signalfd(). Without this, our child processes + * would inherit the blocked signals. + */ +static void +at_fork_child() +{ + sigprocmask(SIG_UNBLOCK, &signal_mask, nullptr); +} + +#else + static void SignalCallback(int signo) { @@ -103,6 +121,7 @@ SignalCallback(int signo) if (!signal_pending[signo].exchange(true)) monitor->WakeUp(); } + #endif void @@ -110,6 +129,8 @@ SignalMonitorInit(EventLoop &loop) { #ifdef USE_SIGNALFD sigemptyset(&signal_mask); + + pthread_atfork(nullptr, nullptr, at_fork_child); #endif monitor.Construct(loop); |