1 files changed, 18 insertions, 0 deletions
diff --git a/mdk-stage1/dietlibc/libstdio/setvbuf.c b/mdk-stage1/dietlibc/libstdio/setvbuf.c
new file mode 100644
index 000000000..d0b1b7640
--- /dev/null
+++ b/mdk-stage1/dietlibc/libstdio/setvbuf.c
@@ -0,0 +1,18 @@
+#include <sys/types.h>
+#include "dietstdio.h"
+#include <unistd.h>
+#include "dietwarning.h"
+
+int setvbuf(FILE *stream, char *buf, int flags , size_t size) {
+#ifdef WANT_BUFFERED_STDIO
+  switch (flags) {
+  case _IONBF: stream->flags = (stream->flags & ~(BUFLINEWISE)) | NOBUF; break;
+  case _IOLBF: stream->flags = (stream->flags & ~(BUFLINEWISE|NOBUF)) | BUFLINEWISE; break;
+  case _IOFBF: stream->flags = stream->flags & ~(NOBUF | BUFLINEWISE); break;
+  default: return -1;
+  }
+#endif
+  return 0;
+}
+
+link_warning("setvbuf","setvbuf does not implement changing the buffer in diet libc.")