Description of problem:

If I change datadir parameter in /etc/my.cnf file to another place that 
/var/lib/mysql, the mysql don't initialize.

The problem is in init.d/mysqld script I try initialize mysql via older
scripts and it was started with success.
Then I'm using mysqld script from tarball from MySQLAB packet.

Version-Release number of selected component (if applicable):

FC4
mysql-devel-4.1.14-1.FC4.1
mysqlclient10-3.23.58-6
mysql-4.1.14-1.FC4.1
mysql-server-4.1.14-1.FC4.1


How reproducible:

1. Create a directory, eg. /mysql and make a chown mysql:mysql /mysql
2. Move /var/lib/mysql to /var/lib/mysql.old
3. Create a symlink. eg ln -sf /mysql /var/lib/mysql
4. After change the references into /etc/my.cnf to /mysql.
5. Try start the mysql

example: datadir=/var/lib/mysql change to /mysql

 
Actual results:

051118 14:21:54  mysqld started
051118 14:21:54 [Warning] Can't create test file /var/lib/mysql/lab.lower-test
^G/usr/libexec/mysqld: Can't change dir to '/var/lib/mysql/' (Errcode: 13)
051118 14:21:54 [ERROR] Aborting

Expected results:
Normal startup

eg:
051118 15:38:59  mysqld started
051118 15:39:00  InnoDB: Started; log sequence number 0 43634
/usr/libexec/mysqld: ready for connections.
Version: '4.1.14'  socket: '/var/lib/mysql/mysql.sock'  port: 3306  Source
distribution