1 files changed, 59 insertions, 0 deletions
diff --git a/libc/stdio/fopencookie.c b/libc/stdio/fopencookie.c
new file mode 100644
index 000000000..73a5a028a
--- /dev/null
+++ b/libc/stdio/fopencookie.c
@@ -0,0 +1,59 @@
+/* Copyright (C) 2004       Manuel Novoa III    <mjn3@codepoet.org>
+ *
+ * GNU Library General Public License (LGPL) version 2 or later.
+ *
+ * Dedicated to Toni.  See uClibc/DEDICATION.mjn3 for details.
+ */
+
+#include "_stdio.h"
+
+#ifndef __UCLIBC_HAS_GLIBC_CUSTOM_STREAMS__
+#error no custom streams!
+#endif
+
+/* NOTE: GLIBC difference!!! -- fopencookie
+ * According to the info pages, glibc allows seeking within buffers even if
+ * no seek function is supplied.  We don't. */
+
+/* NOTE: GLIBC difference!!! -- fopencookie
+ * When compiled without large file support, the offset pointer for the
+ * cookie_seek function is off_t * and not off64_t * as for glibc. */
+
+/* NOTE: GLIBC difference!!! -- fopencookie (bcc only)
+ * Since bcc doesn't support passing of structs, we define fopencookie as a
+ * macro in terms of _fopencookie which takes a struct * for the io functions
+ * instead.
+ */
+
+/* Currently no real reentrancy issues other than a possible double close(). */
+
+#ifndef __BCC__
+FILE *fopencookie(void * __restrict cookie, const char * __restrict mode,
+				  cookie_io_functions_t io_functions)
+#else
+FILE *_fopencookie(void * __restrict cookie, const char * __restrict mode,
+				   register cookie_io_functions_t *io_functions)
+#endif
+{
+	FILE *stream;
+
+	/* Fake an fdopen guaranteed to pass the _stdio_fopen basic agreement
+	 * check without an fcntl call. */
+	stream = _stdio_fopen(((intptr_t)(INT_MAX-1)), mode, NULL, INT_MAX);
+	if (stream) {
+		stream->__filedes = -1;
+#ifndef __BCC__
+		stream->__gcs = io_functions;
+#else
+		stream->__gcs.read  = io_functions->read;
+		stream->__gcs.write = io_functions->write;
+		stream->__gcs.seek  = io_functions->seek;
+		stream->__gcs.close = io_functions->close;
+#endif
+		stream->__cookie = cookie;
+
+		__STDIO_STREAM_VALIDATE(stream);
+	}
+
+	return stream;
+}