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+#ifndef _MAIL_VERSION_H_INCLUDED_
+#define _MAIL_VERSION_H_INCLUDED_
+
+/*++
+/* NAME
+/* mail_version 3h
+/* SUMMARY
+/* globally configurable parameters
+/* SYNOPSIS
+/* #include <mail_version.h>
+/* DESCRIPTION
+/* .nf
+
+ /*
+ * Version of this program. Official versions are called a.b.c, and
+ * snapshots are called a.b-yyyymmdd, where a=major release number, b=minor
+ * release number, c=patchlevel, and yyyymmdd is the release date:
+ * yyyy=year, mm=month, dd=day.
+ *
+ * Patches change both the patchlevel and the release date. Snapshots have no
+ * patchlevel; they change the release date only.
+ */
+#define MAIL_RELEASE_DATE "20240121"
+#define MAIL_VERSION_NUMBER "3.5.24"
+
+#ifdef SNAPSHOT
+#define MAIL_VERSION_DATE "-" MAIL_RELEASE_DATE
+#else
+#define MAIL_VERSION_DATE ""
+#endif
+
+#ifdef NONPROD
+#define MAIL_VERSION_PROD "-nonprod"
+#else
+#define MAIL_VERSION_PROD ""
+#endif
+
+#define VAR_MAIL_VERSION "mail_version"
+#define DEF_MAIL_VERSION MAIL_VERSION_NUMBER MAIL_VERSION_DATE MAIL_VERSION_PROD
+
+extern char *var_mail_version;
+
+ /*
+ * Release date.
+ */
+#define VAR_MAIL_RELEASE "mail_release_date"
+#define DEF_MAIL_RELEASE MAIL_RELEASE_DATE
+extern char *var_mail_release;
+
+ /*
+ * The following macros stamp executable files as well as core dumps. This
+ * information helps to answer the following questions:
+ *
+ * - What Postfix versions(s) are installed on this machine?
+ *
+ * - Is this installation mixing multiple Postfix versions?
+ *
+ * - What Postfix version generated this core dump?
+ *
+ * To find out: strings -f file... | grep mail_version=
+ */
+#include <string.h>
+
+#define MAIL_VERSION_STAMP_DECLARE \
+ char *mail_version_stamp
+
+#define MAIL_VERSION_STAMP_ALLOCATE \
+ mail_version_stamp = strdup(VAR_MAIL_VERSION "=" DEF_MAIL_VERSION)
+
+ /*
+ * Mail version string parser, plus support to compare the compile-time
+ * version string of a Postfix program with the run-time version string of a
+ * Postfix shared library. When programs are not updated, they may fail in
+ * erratic ways when linked against a newer run-time library. Of course the
+ * right solution is so-number versioning of the Postfix run-time library.
+ */
+typedef struct {
+ char *program; /* postfix */
+ int major; /* 2 */
+ int minor; /* 9 */
+ int patch; /* null */
+ char *snapshot; /* 20111209-nonprod */
+} MAIL_VERSION;
+
+extern MAIL_VERSION *mail_version_parse(const char *, const char **);
+extern void mail_version_free(MAIL_VERSION *);
+extern const char *get_mail_version(void);
+extern void check_mail_version(const char *);
+
+#define MAIL_VERSION_CHECK \
+ check_mail_version(DEF_MAIL_VERSION)
+
+/* LICENSE
+/* .ad
+/* .fi
+/* The Secure Mailer license must be distributed with this software.
+/* AUTHOR(S)
+/* Wietse Venema
+/* IBM T.J. Watson Research
+/* P.O. Box 704
+/* Yorktown Heights, NY 10598, USA
+/*
+/* Wietse Venema
+/* Google, Inc.
+/* 111 8th Avenue
+/* New York, NY 10011, USA
+/*--*/
+
+#endif