package/mysql: add MYSQL_SOCKET variable

Add MYSQL_SOCKET variable with MySQL socket location

Signed-off-by: Floris Bos <bos@je-eigen-domein.nl>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/mysql/S97mysqld

@@ -9,7 +9,7 @@ case "$1" in
 
 		# mysqld runs as user mysql, but /run is only writable by root
 		# so create a subdirectory for mysql.
-		install -d -o mysql -g root -m 0700 /run/mysql
+		install -d -o mysql -g root -m 0755 /run/mysql
 
 		# We don't use start-stop-daemon because mysqld has
 		# its own wrapper script.

package/mysql/mysql.mk

@@ -14,6 +14,9 @@ MYSQL_AUTORECONF = YES
 MYSQL_LICENSE = GPLv2
 MYSQL_LICENSE_FILES = README COPYING
 
+# Unix socket. This variable can also be consulted by other buildroot packages
+MYSQL_SOCKET = /run/mysql/mysql.sock
+
 MYSQL_CONF_ENV = \
 	ac_cv_sys_restartable_syscalls=yes \
 	ac_cv_path_PS=/bin/ps \
@@ -31,6 +34,7 @@ MYSQL_CONF_OPTS = \
 	--without-readline \
 	--with-low-memory \
 	--enable-thread-safe-client \
+	--with-unix-socket-path=$(MYSQL_SOCKET) \
 	--disable-mysql-maintainer-mode
 
 # host-mysql only installs what is needed to build mysql, i.e. the

package/mysql/mysqld.service

@@ -5,6 +5,9 @@ Description=MySQL database server
 ExecStartPre=/bin/sh -c 'test -d /var/mysql/mysql || mysql_install_db --user=mysql --ldata=/var/mysql'
 ExecStart=/usr/bin/mysqld_safe
 Restart=always
+User=mysql
+RuntimeDirectory=mysql
+RuntimeDirectoryMode=0755
 
 [Install]
 WantedBy=multi-user.target