Add build system scaffolding and libc headers

1 files changed, 17 insertions, 0 deletions

diff --git a/lib/libc/fcntl/openat.c b/lib/libc/fcntl/openat.c
new file mode 100644
index 00000000..bb34d600
--- /dev/null
+++ b/lib/libc/fcntl/openat.c
@@ -0,0 +1,17 @@
+#include <fcntl.h>
+#include <stdarg.h>
+#include <syscall.h>
+
+int openat(int fd, const char *path, int oflag, ...)
+{
+	mode_t mode = 0;
+
+	if (oflag & O_CREAT) {
+		va_list ap;
+		va_start(ap, oflag);
+		mode = va_arg(ap, mode_t);
+		va_end(ap);
+	}
+
+	return syscall(openat, fd, path, oflag, mode);
+}