Add build system scaffolding and libc headers

1 files changed, 15 insertions, 0 deletions

diff --git a/lib/libc/signal/sigqueue.c b/lib/libc/signal/sigqueue.c
new file mode 100644
index 00000000..9e5b6ddd
--- /dev/null
+++ b/lib/libc/signal/sigqueue.c
@@ -0,0 +1,15 @@
+#include <signal.h>
+#include <errno.h>
+
+int sigprocmask(int how, const sigset_t *restrict set, sigset_t *restrict old)
+{
+	int r = pthread_sigmask(how, set, old);
+
+	if (r == 0) {
+		return r;
+	}
+
+	errno = r;
+
+	return -1;
+}