Add build system scaffolding and libc headers

1 files changed, 17 insertions, 0 deletions

diff --git a/lib/libc/devctl/posix_devctl.c b/lib/libc/devctl/posix_devctl.c
new file mode 100644
index 00000000..bc8e7331
--- /dev/null
+++ b/lib/libc/devctl/posix_devctl.c
@@ -0,0 +1,17 @@
+#include <libc.h>
+#include <devctl.h>
+#include <errno.h>
+#include <syscall.h>
+
+int posix_devctl(int fildes, int dcmd, void *restrict dev_data_ptr,
+		 size_t unused nbyte, int *restrict dev_info_ptr)
+{
+	long r;
+
+	if ((r = syscall(ioctl, fildes, dcmd, dev_data_ptr)) < 0)
+		return errno;
+
+	*dev_info_ptr = r;
+
+	return 0;
+}