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diff --git a/lib/libuutil/uu_dprintf.c b/lib/libuutil/uu_dprintf.c
new file mode 100644
index 0000000..5b990a5
--- /dev/null
+++ b/lib/libuutil/uu_dprintf.c
@@ -0,0 +1,128 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include "libuutil_common.h"
+
+#include <errno.h>
+#include <libintl.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <strings.h>
+
+#define	FACILITY_FMT	"%s (%s): "
+
+#if !defined(TEXT_DOMAIN)
+#define	TEXT_DOMAIN "SYS_TEST"
+#endif
+
+static const char *
+strseverity(uu_dprintf_severity_t severity)
+{
+	switch (severity) {
+	case UU_DPRINTF_SILENT:
+		return (dgettext(TEXT_DOMAIN, "silent"));
+	case UU_DPRINTF_FATAL:
+		return (dgettext(TEXT_DOMAIN, "FATAL"));
+	case UU_DPRINTF_WARNING:
+		return (dgettext(TEXT_DOMAIN, "WARNING"));
+	case UU_DPRINTF_NOTICE:
+		return (dgettext(TEXT_DOMAIN, "note"));
+	case UU_DPRINTF_INFO:
+		return (dgettext(TEXT_DOMAIN, "info"));
+	case UU_DPRINTF_DEBUG:
+		return (dgettext(TEXT_DOMAIN, "debug"));
+	default:
+		return (dgettext(TEXT_DOMAIN, "unspecified"));
+	}
+}
+
+uu_dprintf_t *
+uu_dprintf_create(const char *name, uu_dprintf_severity_t severity,
+    uint_t flags)
+{
+	uu_dprintf_t *D;
+
+	if (uu_check_name(name, UU_NAME_DOMAIN) == -1) {
+		uu_set_error(UU_ERROR_INVALID_ARGUMENT);
+		return (NULL);
+	}
+
+	if ((D = uu_zalloc(sizeof (uu_dprintf_t))) == NULL)
+		return (NULL);
+
+	if (name != NULL) {
+		D->uud_name = strdup(name);
+		if (D->uud_name == NULL) {
+			uu_free(D);
+			return (NULL);
+		}
+	} else {
+		D->uud_name = NULL;
+	}
+
+	D->uud_severity = severity;
+	D->uud_flags = flags;
+
+	return (D);
+}
+
+/*PRINTFLIKE3*/
+void
+uu_dprintf(uu_dprintf_t *D, uu_dprintf_severity_t severity,
+    const char *format, ...)
+{
+	va_list alist;
+
+	/* XXX Assert that severity is not UU_DPRINTF_SILENT. */
+
+	if (severity > D->uud_severity)
+		return;
+
+	(void) fprintf(stderr, FACILITY_FMT, D->uud_name,
+	    strseverity(severity));
+
+	va_start(alist, format);
+	(void) vfprintf(stderr, format, alist);
+	va_end(alist);
+}
+
+void
+uu_dprintf_destroy(uu_dprintf_t *D)
+{
+	if (D->uud_name)
+		free(D->uud_name);
+
+	uu_free(D);
+}
+
+const char *
+uu_dprintf_getname(uu_dprintf_t *D)
+{
+	return (D->uud_name);
+}