worker: allow graceful shutdowns

Well, maybe "graceful" is a strong word, but now you _can_ do

    ./server &
    ./worker &
    ./client ci_run URL REV && kill "$( pidof worker )"

and the worker will wait for the CI run to complete.

1 files changed, 23 insertions, 0 deletions

diff --git a/src/signal.c b/src/signal.c
new file mode 100644
index 0000000..fc4ac8b
--- /dev/null
+++ b/src/signal.c
@@ -0,0 +1,23 @@
+#include "signal.h"
+#include "log.h"
+
+#include <pthread.h>
+#include <signal.h>
+
+volatile sig_atomic_t global_stop_flag = 0;
+
+int signal_set_thread_attr(pthread_attr_t *attr)
+{
+	sigset_t set;
+	sigemptyset(&set);
+	sigaddset(&set, SIGINT);
+	sigaddset(&set, SIGQUIT);
+	sigaddset(&set, SIGTERM);
+
+	if (pthread_attr_setsigmask_np(attr, &set)) {
+		print_errno("pthread_attr_setsigmask_np");
+		return -1;
+	}
+
+	return 0;
+}