--- /dev/null
+++ Libc/Libc-391.2.3/include/err.h
@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ * 
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ * 
+ * @APPLE_LICENSE_HEADER_END@
+ */
+/*-
+ * Copyright (c) 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * 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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. 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.
+ *
+ *	@(#)err.h	8.1 (Berkeley) 6/2/93
+ */
+
+#ifndef _ERR_H_
+#define	_ERR_H_
+
+/*
+ * Don't use va_list in the err/warn prototypes.   Va_list is typedef'd in two
+ * places (<machine/varargs.h> and <machine/stdarg.h>), so if we include one
+ * of them here we may collide with the utility's includes.  It's unreasonable
+ * for utilities to have to include one of them to include err.h, so we get
+ * __darwin_va_list from <machine/_type.h> and use it.
+ */
+#include <sys/cdefs.h>
+#include <_types.h>
+
+__BEGIN_DECLS
+void	err(int, const char *, ...) __DARWIN_LDBL_COMPAT(err) __dead2;
+void	verr(int, const char *, __darwin_va_list) __DARWIN_LDBL_COMPAT(verr) __dead2;
+void	errc(int, int, const char *, ...) __DARWIN_LDBL_COMPAT(errc) __dead2;
+void	verrc(int, int, const char *, __darwin_va_list) __DARWIN_LDBL_COMPAT(verrc) __dead2;
+void	errx(int, const char *, ...) __DARWIN_LDBL_COMPAT(errx) __dead2;
+void	verrx(int, const char *, __darwin_va_list) __DARWIN_LDBL_COMPAT(verrx) __dead2;
+void	warn(const char *, ...) __DARWIN_LDBL_COMPAT(warn);
+void	vwarn(const char *, __darwin_va_list) __DARWIN_LDBL_COMPAT(vwarn);
+void	warnc(int, const char *, ...) __DARWIN_LDBL_COMPAT(warnc);
+void	vwarnc(int, const char *, __darwin_va_list) __DARWIN_LDBL_COMPAT(vwarnc);
+void	warnx(const char *, ...) __DARWIN_LDBL_COMPAT(warnx);
+void	vwarnx(const char *, __darwin_va_list) __DARWIN_LDBL_COMPAT(vwarnx);
+void	err_set_file(void *);
+void	err_set_exit(void (*)(int));
+
+__END_DECLS
+
+#endif /* !_ERR_H_ */