svn更新程序

#touch update.php
#vim update.php

    system("/usr/bin/svn checkout /var/www/test  --username xxx --password xxxxxx");
?>

刚开始更新，有提示错误，查看apache日志，知道是权限的问题:
[root@meguro logs]# tail -f error_log
[Thu Jun 25 16:36:03 2009] [error] [client 192.168.8.228] File does not exist: /var/www/favicon.ico
svn: Can't open file '/root/.subversion/servers': Permission denied
svn: Can't open file '/root/.subversion/servers': Permission denied
添加权限后，svn便可以正常更新.成功后会出现:"Checked out revision 66."的信息.