don't use the latest glibc features

pthread_attr_setsigmask_np is only available since 2.32, which is too
modern.

1 files changed, 20 insertions, 10 deletions

diff --git a/src/signal.c b/src/signal.c
index a0b9c3d..c3ea7c3 100644
--- a/src/signal.c
+++ b/src/signal.c
@@ -1,26 +1,36 @@
 #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)
+int signal_set(const sigset_t *new, sigset_t *old)
 {
 	int ret = 0;
 
+	ret = sigprocmask(SIG_SETMASK, new, old);
+	if (ret < 0) {
+		print_errno("sigprocmask");
+		return ret;
+	}
+
+	return ret;
+}
+
+int signal_block_parent(sigset_t *old)
+{
+	sigset_t new;
+	sigfillset(&new);
+	return signal_set(&new, old);
+}
+
+int signal_block_child()
+{
 	sigset_t set;
 	sigemptyset(&set);
 	sigaddset(&set, SIGINT);
 	sigaddset(&set, SIGQUIT);
 	sigaddset(&set, SIGTERM);
-
-	ret = pthread_attr_setsigmask_np(attr, &set);
-	if (ret) {
-		pthread_print_errno(ret, "pthread_attr_setsigmask_np");
-		return ret;
-	}
-
-	return ret;
+	return signal_set(&set, NULL);
 }