properly set paths in systemd unit files

Use variables in systemd unit file templetes to properly set paths in
final systemd unit files.

support-files/CMakeLists.txt

@@ -90,6 +90,8 @@ IF(UNIX)
   SET(scriptdir ${INSTALL_SCRIPTDIRABS})
   SET(libexecdir ${INSTALL_SBINDIRABS})
   SET(pkgdatadir ${INSTALL_MYSQLSHAREDIRABS})
+  SET(sysconfdir ${INSTALL_SYSCONFDIR})
+  SET(sysconf2dir ${INSTALL_SYSCONF2DIR})
   CONFIGURE_FILE(${CMAKE_CURRENT_SOURCE_DIR}/mysql.server.sh 
                  ${CMAKE_CURRENT_BINARY_DIR}/mysql.server @ONLY)
   INSTALL(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/mysql.server

support-files/mariadb.service.in

@@ -67,19 +67,19 @@ PermissionsStartOnly=true
 # It is always safe to unset _WSREP_START_POSITION environment variable.
 # Do not panic if galera_recovery script is not available. (MDEV-10538)
 ExecStartPre=/bin/sh -c "systemctl unset-environment _WSREP_START_POSITION"
-ExecStartPre=/bin/sh -c "[ ! -e /usr/bin/galera_recovery ] && VAR= || \
- VAR=`/usr/bin/galera_recovery`; [ $? -eq 0 ] \
+ExecStartPre=/bin/sh -c "[ ! -e @bindir@/galera_recovery ] && VAR= || \
+ VAR=`@bindir@/galera_recovery`; [ $? -eq 0 ] \
  && systemctl set-environment _WSREP_START_POSITION=$VAR || exit 1"
 
 # Needed to create system tables etc.
-# ExecStartPre=/usr/bin/mysql_install_db -u mysql
+# ExecStartPre=@scriptdir@/mysql_install_db -u mysql
 
 # Start main service
 # MYSQLD_OPTS here is for users to set in /etc/systemd/system/mariadb.service.d/MY_SPECIAL.conf
 # Use the [service] section and Environment="MYSQLD_OPTS=...".
 # This isn't a replacement for my.cnf.
 # _WSREP_NEW_CLUSTER is for the exclusive use of the script galera_new_cluster
-ExecStart=/usr/sbin/mysqld $MYSQLD_OPTS $_WSREP_NEW_CLUSTER $_WSREP_START_POSITION
+ExecStart=@sbindir@/mysqld $MYSQLD_OPTS $_WSREP_NEW_CLUSTER $_WSREP_START_POSITION
 @SYSTEMD_EXECSTARTPOST@
 
 # Unset _WSREP_START_POSITION environment variable.
@@ -145,7 +145,7 @@ LimitNOFILE=16364
 # ExecStartPre=sysctl -q -w vm.drop_caches=3
 
 # numa-interleave=1 equalivant
-# Change ExecStart=numactl --interleave=all /usr/sbin/mysqld......
+# Change ExecStart=numactl --interleave=all @sbindir@/mysqld......
 
 # crash-script equalivent
 # FailureAction=

support-files/mariadb@.service.in

 # Multi instance version of mariadb. For if you run multiple versions at once.
 # Also used for mariadb@bootstrap to bootstrap Galera.
 #
-# create config file @INSTALL_SYSCONF2DIR@/my{instancename}.cnf
+# create config file @sysconf2dir@/my{instancename}.cnf
 #
 # start as systemctl start mariadb@{instancename}.server
 
@@ -22,7 +22,7 @@ Description=MariaDB database server
 After=network.target
 After=syslog.target
 
-ConditionPathExists=@INSTALL_SYSCONF2DIR@/my%I.cnf
+ConditionPathExists=@sysconf2dir@/my%I.cnf
 
 [Install]
 WantedBy=multi-user.target
@@ -73,19 +73,19 @@ PermissionsStartOnly=true
 # Do not panic if galera_recovery script is not available. (MDEV-10538)
 ExecStartPre=/bin/sh -c "systemctl unset-environment _WSREP_START_POSITION%I"
 
-ExecStartPre=/bin/sh -c "[ ! -e /usr/bin/galera_recovery ] && VAR= || \
- VAR=`/usr/bin/galera_recovery --defaults-file=@INSTALL_SYSCONF2DIR@/my%I.cnf`; [ $? -eq 0 ] \
+ExecStartPre=/bin/sh -c "[ ! -e @bindir@/galera_recovery ] && VAR= || \
+ VAR=`@bindir@/galera_recovery --defaults-file=@sysconf2dir@/my%I.cnf`; [ $? -eq 0 ] \
  && systemctl set-environment _WSREP_START_POSITION%I=$VAR || exit 1"
 
 # Alternate: (remove ConditionPathExists above)
 # use [mysqld.INSTANCENAME] as sections in my.cnf
 #
-#ExecStartPre=/bin/sh -c "[ ! -e /usr/bin/galera_recovery ] && VAR= || \
-# VAR=`/usr/bin/galera_recovery --defaults-group-suffix=%I`; [ $? -eq 0 ] \
+#ExecStartPre=/bin/sh -c "[ ! -e @bindir@/galera_recovery ] && VAR= || \
+# VAR=`@bindir@/galera_recovery --defaults-group-suffix=%I`; [ $? -eq 0 ] \
 # && systemctl set-environment _WSREP_START_POSITION%I=$VAR || exit 1"
 
 # Needed to create system tables etc.
-# ExecStartPre=/usr/bin/mysql_install_db -u mysql
+# ExecStartPre=@scriptdir@/mysql_install_db -u mysql
 
 # Start main service
 # MYSQLD_OPTS here is for users to set in /etc/systemd/system/mariadb@.service.d/MY_SPECIAL.conf
@@ -95,12 +95,12 @@ ExecStartPre=/bin/sh -c "[ ! -e /usr/bin/galera_recovery ] && VAR= || \
 
 # Note: Place $MYSQLD_OPTS at the very end for its options to take precedence.
 
-ExecStart=/usr/sbin/mysqld --defaults-file=@INSTALL_SYSCONF2DIR@/my%I.cnf \
+ExecStart=@sbindir@/mysqld --defaults-file=@sysconf2dir@/my%I.cnf \
   $_WSREP_NEW_CLUSTER $_WSREP_START_POSITION%I $MYSQLD_OPTS
 # Alternate: (remove ConditionPathExists above)
 # use [mysqld.INSTANCENAME] as sections in my.cnf
 #
-# ExecStart=/usr/sbin/mysqld --defaults-group-suffix=%I \
+# ExecStart=@sbindir@/mysqld --defaults-group-suffix=%I \
 # $_WSREP_NEW_CLUSTER $_WSREP_START_POSITION%I $MYSQLD_OPTS
 
 # Unset _WSREP_START_POSITION environment variable.
@@ -166,7 +166,7 @@ LimitNOFILE=16364
 # ExecStartPre=sysctl -q -w vm.drop_caches=3
 
 # numa-interleave=1 equalivant
-# Change ExecStart=numactl --interleave=all /usr/sbin/mysqld......
+# Change ExecStart=numactl --interleave=all @sbindir@/mysqld......
 
 # crash-script equalivent
 # FailureAction=