auto import from //depot/cupcake/@135843
diff --git a/libc/stdio/local.h b/libc/stdio/local.h
new file mode 100644
index 0000000..3db1fc5
--- /dev/null
+++ b/libc/stdio/local.h
@@ -0,0 +1,91 @@
+/* $OpenBSD: local.h,v 1.12 2005/10/10 17:37:44 espie Exp $ */
+
+/*-
+ * Copyright (c) 1990, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Chris Torek.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include "wcio.h"
+#include "fileext.h"
+
+#ifndef DEFFILEMODE
+#define DEFFILEMODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
+#endif
+
+
+/*
+ * Information local to this implementation of stdio,
+ * in particular, macros and private variables.
+ */
+
+int __sflush(FILE *);
+FILE *__sfp(void);
+int __srefill(FILE *);
+int __sread(void *, char *, int);
+int __swrite(void *, const char *, int);
+fpos_t __sseek(void *, fpos_t, int);
+int __sclose(void *);
+void __sinit(void);
+void _cleanup(void);
+void __smakebuf(FILE *);
+int __swhatbuf(FILE *, size_t *, int *);
+int _fwalk(int (*)(FILE *));
+int __swsetup(FILE *);
+int __sflags(const char *, int *);
+
+extern void __atexit_register_cleanup(void (*)(void));
+extern int __sdidinit;
+
+/*
+ * Return true if the given FILE cannot be written now.
+ */
+#define cantwrite(fp) \
+ ((((fp)->_flags & __SWR) == 0 || (fp)->_bf._base == NULL) && \
+ __swsetup(fp))
+
+/*
+ * Test whether the given stdio file has an active ungetc buffer;
+ * release such a buffer, without restoring ordinary unread data.
+ */
+#define HASUB(fp) (_UB(fp)._base != NULL)
+#define FREEUB(fp) { \
+ if (_UB(fp)._base != (fp)->_ubuf) \
+ free(_UB(fp)._base); \
+ _UB(fp)._base = NULL; \
+}
+
+/*
+ * test for an fgetln() buffer.
+ */
+#define HASLB(fp) ((fp)->_lb._base != NULL)
+#define FREELB(fp) { \
+ free((char *)(fp)->_lb._base); \
+ (fp)->_lb._base = NULL; \
+}