1 files changed, 55 insertions, 0 deletions
diff --git a/src/stdio/fopen_s.c b/src/stdio/fopen_s.c
new file mode 100644
index 00000000..59385515
--- /dev/null
+++ b/src/stdio/fopen_s.c
@@ -0,0 +1,55 @@
+#include "stdio.h"
+#include "__stdio.h"
+#include <string.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+/** open a file stream **/
+errno_t fopen_s(FILE * restrict * restrict streamptr,
+	const char * restrict filename,
+	const char * restrict mode);
+{
+	__C_EXT(1, 201112L);
+	return 0;
+}
+
+/***
+The fn(fopen) function opens a file stream associated with the file
+arg(filename).
+
+The type of file and allowed operations are determined by arg(mode):
+
+string(r)	text file; read-only
+string(w)	text file; write-only; truncate to 0 bytes
+string(a)	text file; append
+string(rb)	binary file; read-only
+string(wb)	binary file; write-only; truncate to 0 bytes
+string(ab)	binary file; append
+string(r+)	text file; update (read and write)
+string(w+)	text file; update (read and write); truncate to 0 bytes
+string(a+)	text file; update (read and write); append data to end of file
+string(r+b)	binary file; update (read and write)
+string(rb+)	binary file; update (read and write)
+string(w+b)	binary file; update (read and write); truncate to 0 bytes
+string(wb+)	binary file; update (read and write); truncate to 0 bytes
+string(a+b)	binary file; update (read and write); append data to end of file
+string(ab+)	binary file; update (read and write); append data to end of file
+
+File streams are opened in fully buffered mode if and only if arg(filename) is
+not an interactive device.
+
+The error and end-of-file indicators are cleared.
+***/
+
+/* UNSPECIFIED: - */
+/* UNDEFINED: - */
+/* IMPLEMENTATION: - */
+/* LOCALE: - */
+
+/* RETURN(NULL): failure */
+/* RETURN: a pointer to the new file stream */
+
+/*
+CEXT1(201112)
+*/