--- /dev/null
+++ Libc/Libc-1583.60.2/libdarwin/err.c
@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2018 Apple 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@
+ */
+#include "internal.h"
+
+#pragma mark Utilities
+static void
+_print_preamble(FILE *fp, const char *fmt, va_list ap)
+{
+	fprintf(fp, "%s: ", getprogname());
+	vfprintf(fp, fmt, ap);
+}
+
+#pragma mark API
+void
+err_np(errno_t code, const char *fmt, ...)
+{
+	va_list ap;
+
+	va_start(ap, fmt);
+	verr_np(code, fmt, ap);
+	va_end(ap);
+}
+
+void
+errc_np(int eval, errno_t code, const char *fmt, ...)
+{
+	va_list ap;
+
+	va_start(ap, fmt);
+	verrc_np(eval, code, fmt, ap);
+	va_end(ap);
+}
+
+void
+warn_np(errno_t code, const char *fmt, ...)
+{
+	va_list ap;
+
+	va_start(ap, fmt);
+	vwarn_np(code, fmt, ap);
+	va_end(ap);
+}
+
+void
+verr_np(errno_t code, const char *fmt, va_list ap)
+{
+	_print_preamble(stderr, fmt, ap);
+	fprintf(stderr, ": %s\n", strerror_np(code));
+	exit(sysexit_np(code));
+}
+
+void
+verrc_np(int eval, errno_t code, const char *fmt, va_list ap)
+{
+	_print_preamble(stderr, fmt, ap);
+	fprintf(stderr, ": %s\n", strerror_np(code));
+	exit(eval);
+}
+
+void
+vwarn_np(errno_t code, const char *fmt, va_list ap)
+{
+	_print_preamble(stderr, fmt, ap);
+	fprintf(stderr, ": %s\n", strerror_np(code));
+}