Generate and install sysusers and tmpfiles configuration

Using systemd we can automate creating users and directories. So
generate and install the configuration files.
Signed-off-by: Vicențiu Ciorbaru <vicentiu@mariadb.org>

Small change in cmake/install_layout.cmake compared to original contributor
patch to also install SYSTEMD_SYSUSERS and SYSTEMD_TMPFILES directories. The
variables were being set, but the loop which defines the final install files
was not updated.

cmake/install_layout.cmake

@@ -162,6 +162,8 @@ SET(INSTALL_MYSQLDATADIR_RPM            "/var/lib/mysql")
 
 SET(INSTALL_UNIX_ADDRDIR_RPM            "${INSTALL_MYSQLDATADIR_RPM}/mysql.sock")
 SET(INSTALL_SYSTEMD_UNITDIR_RPM         "/usr/lib/systemd/system")
+SET(INSTALL_SYSTEMD_SYSUSERSDIR_RPM     "/usr/lib/sysusers.d")
+SET(INSTALL_SYSTEMD_TMPFILESDIR_RPM     "/usr/lib/tmpfiles.d")
 
 #
 # DEB layout
@@ -191,6 +193,8 @@ SET(INSTALL_MYSQLDATADIR_DEB            "/var/lib/mysql")
 
 SET(INSTALL_UNIX_ADDRDIR_DEB            "/var/run/mysqld/mysqld.sock")
 SET(INSTALL_SYSTEMD_UNITDIR_DEB         "/lib/systemd/system")
+SET(INSTALL_SYSTEMD_SYSUSERSDIR_DEB     "/usr/lib/sysusers.d")
+SET(INSTALL_SYSTEMD_TMPFILESDIR_DEB     "/usr/lib/tmpfiles.d")
 
 #
 # SVR4 layout
@@ -232,7 +236,7 @@ SET(OLD_INSTALL_LAYOUT ${INSTALL_LAYOUT} CACHE INTERNAL "")
 # layout is chosen)
 FOREACH(var BIN SBIN LIB MYSQLSHARE SHARE PLUGIN INCLUDE SCRIPT DOC MAN SYSCONF SYSCONF2
     INFO MYSQLTEST SQLBENCH DOCREADME SUPPORTFILES MYSQLDATA UNIX_ADDR
-    SYSTEMD_UNIT)
+    SYSTEMD_UNIT SYSTEMD_SYSUSERS SYSTEMD_TMPFILES)
   SET(INSTALL_${var}DIR  ${INSTALL_${var}DIR_${INSTALL_LAYOUT}}
   CACHE STRING "${var} installation directory" ${FORCE})
   MARK_AS_ADVANCED(INSTALL_${var}DIR)

support-files/CMakeLists.txt

@@ -104,6 +104,21 @@ IF(UNIX)
             ${CMAKE_CURRENT_BINARY_DIR}/mariadb.service
             DESTINATION ${inst_location}/systemd COMPONENT SupportFiles)
 
+    IF(INSTALL_SYSTEMD_SYSUSERSDIR)
+      CONFIGURE_FILE(sysusers.conf.in
+              ${CMAKE_CURRENT_BINARY_DIR}/sysusers.conf @ONLY)
+      INSTALL(FILES ${CMAKE_CURRENT_BINARY_DIR}/sysusers.conf
+              DESTINATION ${INSTALL_SYSTEMD_SYSUSERSDIR} COMPONENT Server)
+    ENDIF()
+
+    IF(INSTALL_SYSTEMD_TMPFILESDIR)
+      get_filename_component(MYSQL_UNIX_DIR ${MYSQL_UNIX_ADDR} DIRECTORY)
+      CONFIGURE_FILE(tmpfiles.conf.in
+              ${CMAKE_CURRENT_BINARY_DIR}/tmpfiles.conf @ONLY)
+      INSTALL(FILES ${CMAKE_CURRENT_BINARY_DIR}/tmpfiles.conf
+              DESTINATION ${INSTALL_SYSTEMD_TMPFILESDIR} COMPONENT Server)
+    ENDIF()
+
     # @ in directory name broken between CMake version 2.8.12.2 and 3.3
     # http://public.kitware.com/Bug/view.php?id=14782
     IF(NOT CMAKE_VERSION VERSION_LESS 3.3.0 OR NOT RPM)

support-files/sysusers.conf.in

+u @MYSQLD_USER@ - "MariaDB" @MYSQL_DATADIR@

support-files/tmpfiles.conf.in

+d @MYSQL_UNIX_DIR@ 0755 @MYSQLD_USER@ @MYSQLD_USER@ -