Add build system scaffolding and libc headers

1 files changed, 20 insertions, 0 deletions

diff --git a/lib/libc/stdio/setvbuf.c b/lib/libc/stdio/setvbuf.c
new file mode 100644
index 00000000..56d7196c
--- /dev/null
+++ b/lib/libc/stdio/setvbuf.c
@@ -0,0 +1,20 @@
+#include <io.h>
+#include <stdio.h>
+
+int setvbuf(FILE *restrict stream, char *restrict buf, int type, size_t size)
+{
+	if (type != _IOFBF && type != _IOLBF && type != _IONBF)
+		return -1;
+	if (type != _IONBF && (buf == NULL || size == 0))
+		return -1;
+
+	if (stream->fd < 0)
+		return -1;
+
+	stream->buf = buf;
+	stream->buf_size = size;
+	stream->buf_pos = 0;
+	stream->type = type;
+
+	return 0;
+}