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diff --git a/smtpd/log.h b/smtpd/log.h
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+/* $OpenBSD: log.h,v 1.8 2018/04/26 20:57:59 eric Exp $ */
+
+/*
+ * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef LOG_H
+#define LOG_H
+
+#include "openbsd-compat.h"
+
+#include <syslog.h>
+
+#include <stdarg.h>
+#ifdef HAVE_SYS_CDEFS_H
+#include <sys/cdefs.h>
+#endif
+
+void log_init(int, int);
+void log_procinit(const char *);
+void log_setverbose(int);
+int log_getverbose(void);
+void log_warn(const char *, ...)
+ __attribute__((__format__ (printf, 1, 2)));
+void log_warnx(const char *, ...)
+ __attribute__((__format__ (printf, 1, 2)));
+void log_info(const char *, ...)
+ __attribute__((__format__ (printf, 1, 2)));
+void log_debug(const char *, ...)
+ __attribute__((__format__ (printf, 1, 2)));
+void logit(int, const char *, ...)
+ __attribute__((__format__ (printf, 2, 3)));
+void vlog(int, const char *, va_list)
+ __attribute__((__format__ (printf, 2, 0)));
+__dead void fatal(const char *, ...)
+ __attribute__((__format__ (printf, 1, 2)));
+__dead void fatalx(const char *, ...)
+ __attribute__((__format__ (printf, 1, 2)));
+
+#endif /* LOG_H */