From 3430cee3038a84ed9719a90bdc879646786d9ebf Mon Sep 17 00:00:00 2001
From: "Heiko Schlittermann (HS12-RIPE)" <hs@schlittermann.de>
Date: Sat, 14 Oct 2017 00:24:54 +0200
Subject: [PATCH] Fix mariadb/mysql macro confusion

---
 src/src/EDITME          |  3 ++-
 src/src/lookups/mysql.c | 55 ++++++++++++++++++++++++++++++++++++++---
 2 files changed, 53 insertions(+), 5 deletions(-)

diff --git a/src/src/EDITME b/src/src/EDITME
index df74aacde..110e8fbed 100644
--- a/src/src/EDITME
+++ b/src/src/EDITME
@@ -253,7 +253,7 @@ TRANSPORT_SMTP=yes
 # you perform upgrades and revert them. You should consider the benefit of
 # embedding the Exim version number into LOOKUP_MODULE_DIR, so that you can
 # maintain two concurrent sets of modules.
-# 
+#
 # *BEWARE*: ability to modify the files in LOOKUP_MODULE_DIR is equivalent to
 # the ability to modify the Exim binary, which is often setuid root!  The Exim
 # developers only intend this functionality be used by OS software packagers
@@ -306,6 +306,7 @@ LOOKUP_DNSDB=yes
 # LOOKUP_IBASE=yes
 # LOOKUP_LDAP=yes
 # LOOKUP_MYSQL=yes
+# LOOKUP_MYSQL_PC=mariadb
 # LOOKUP_NIS=yes
 # LOOKUP_NISPLUS=yes
 # LOOKUP_ORACLE=yes
diff --git a/src/src/lookups/mysql.c b/src/src/lookups/mysql.c
index 5cf15af3a..b5133bc00 100644
--- a/src/src/lookups/mysql.c
+++ b/src/src/lookups/mysql.c
@@ -14,6 +14,53 @@ functions. */
 
 #include <mysql.h>       /* The system header */
 
+/* We define symbols for *_VERSION_ID (numeric), *_VERSION_STR (char*)
+and *_BASE_STR (char*). It's a bit of guesswork. Especially for mariadb
+with versions before 10.2, as they do not define there there specific symbols.
+*/
+
+// Newer (>= 10.2) MariaDB
+#if defined                   MARIADB_VERSION_ID
+#define EXIM_MxSQL_VERSION_ID MARIADB_VERSION_ID
+
+// MySQL defines MYSQL_VERSION_ID, and MariaDB does so
+// https://dev.mysql.com/doc/refman/5.7/en/c-api-server-client-versions.html
+#elif defined                 LIBMYSQL_VERSION_ID
+#define EXIM_MxSQL_VERSION_ID LIBMYSQL_VERSION_ID
+#elif defined                 MYSQL_VERSION_ID
+#define EXIM_MxSQL_VERSION_ID MYSQL_VERSION_ID
+
+#else
+#define EXIM_MYSQL_VERSION_ID  0
+#endif
+
+// Newer (>= 10.2) MariaDB
+#ifdef                         MARIADB_CLIENT_VERSION_STR
+#define EXIM_MxSQL_VERSION_STR MARIADB_CLIENT_VERSION_STR
+
+// Mysql uses MYSQL_SERVER_VERSION
+#elif defined                  LIBMYSQL_VERSION
+#define EXIM_MxSQL_VERSION_STR LIBMYSQL_VERSION
+#elif defined                  MYSQL_SERVER_VERSION
+#define EXIM_MxSQL_VERSION_STR MYSQL_SERVER_VERSION
+
+#else
+#define EXIM_MxSQL_VERSION_STR  "N.A."
+#endif
+
+#if defined                 MARIADB_BASE_VERSION
+#define EXIM_MxSQL_BASE_STR MARIADB_BASE_VERSION
+
+#elif defined               MARIADB_PACKAGE_VERSION
+#define EXIM_MxSQL_BASE_STR "mariadb"
+
+#elif defined               MYSQL_BASE_VERSION
+#define EXIM_MxSQL_BASE_STR MYSQL_BASE_VERSION
+
+#else
+#define EXIM_MxSQL_BASE_STR  "n.A."
+#endif
+
 
 /* Structure and anchor for caching connections. */
 
@@ -432,10 +479,10 @@ return quoted;
 void
 mysql_version_report(FILE *f)
 {
-fprintf(f, "Library version: MySQL: Compile: %s [%s]\n"
-           "                        Runtime: %s\n",
-        MYSQL_SERVER_VERSION, MYSQL_COMPILATION_COMMENT,
-        mysql_get_client_info());
+fprintf(f, "Library version: MySQL: Compile: %lu %s [%s]\n"
+           "                        Runtime: %lu %s\n",
+        (long)EXIM_MxSQL_VERSION_ID, EXIM_MxSQL_VERSION_STR, EXIM_MxSQL_BASE_STR,
+        mysql_get_client_version(), mysql_get_client_info());
 #ifdef DYNLOOKUP
 fprintf(f, "                        Exim version %s\n", EXIM_VERSION_STR);
 #endif
-- 
2.30.2