1 files changed, 17 insertions, 0 deletions
diff --git a/usr/klibc/stdio/ungetc.c b/usr/klibc/stdio/ungetc.c
new file mode 100644
index 0000000..fe328ac
--- /dev/null
+++ b/usr/klibc/stdio/ungetc.c
@@ -0,0 +1,17 @@
+/*
+ * ungetc.c
+ */
+
+#include "stdioint.h"
+
+int ungetc(int c, FILE *file)
+{
+	struct _IO_file_pvt *f = stdio_pvt(file);
+
+	if (f->obytes || f->data <= f->buf)
+		return EOF;
+
+	*(--f->data) = c;
+	f->ibytes++;
+	return c;
+}