Add build system scaffolding and libc headers

1 files changed, 14 insertions, 0 deletions

diff --git a/lib/libc/signal/sigwait.c b/lib/libc/signal/sigwait.c
new file mode 100644
index 00000000..59b0dd6c
--- /dev/null
+++ b/lib/libc/signal/sigwait.c
@@ -0,0 +1,14 @@
+#include <signal.h>
+
+int sigwait(const sigset_t *restrict mask, int *restrict sig)
+{
+	siginfo_t si;
+
+	if (sigtimedwait(mask, &si, 0) < 0) {
+		return -1;
+	}
+
+	*sig = si.si_signo;
+
+	return 0;
+}