1 files changed, 39 insertions, 0 deletions
diff --git a/mariadb-check-socket.sh b/mariadb-check-socket.sh
new file mode 100644
index 0000000..5c2b639
--- /dev/null
+++ b/mariadb-check-socket.sh
@@ -0,0 +1,39 @@
+#!/bin/sh
+
+# We check if there is already a process using the socket file,
+# since otherwise the systemd service file could report false
+# positive result when starting and mysqld_safe could remove
+# a socket file, which is actually being used by a different daemon.
+
+source "`dirname ${BASH_SOURCE[0]}`/mariadb-scripts-common"
+
+if test -e "$socketfile" ; then
+    echo "Socket file $socketfile exists." >&2
+
+    # no write permissions
+    if ! test -w "$socketfile" ; then
+        echo "Not enough permission to write to the socket file $socketfile, which is suspicious." >&2
+        echo "Please, remove $socketfile manually to start the service." >&2
+        exit 1
+    fi
+
+    # not a socket file
+    if ! test -S "$socketfile" ; then
+        echo "The file $socketfile is not a socket file, which is suspicious." >&2
+        echo "Please, remove $socketfile manually to start the service." >&2
+        exit 1
+    fi
+
+    # some process uses the socket file
+    response=`/usr/bin/mariadb-admin --no-defaults --socket="$socketfile" --user=UNKNOWN_MYSQL_USER --connect-timeout="${CHECKSOCKETTIMEOUT:-10}" ping 2>&1`
+    if [ $? -eq 0 ] || echo "$response" | grep -q "Access denied for user" ; then
+        echo "Is another MariaDB daemon already running with the same unix socket?" >&2
+        echo "Please, stop the process using the socket $socketfile or remove the file manually to start the service." >&2
+        exit 1
+    fi
+
+    # socket file is a garbage
+    echo "No process is using $socketfile, which means it is a garbage, so it will be removed automatically." >&2
+fi
+
+exit 0