apache如何动态绑定子目录，*.example.com，test.example.com=>/example.com/test.example.com

apache如何动态绑定子目录，
域名泛解析*.example.com
如果用户访问test.example.com
重写到这样的路径 /example.com/test.example.com

我在/example.com下放了一个.htaccess里面这样写的不行
RewriteEngine on
RewriteBase /
RewriteRule ^.*$ /%{SERVER_NAME}/$0 [L]


错误日志：
[Thu Jul 21 19:41:33 2011] [error] [client 127.0.0.1] Request exceeded the limit of 10 internal redirects due to probable configuration error. Use 'LimitInternalRecursion' to increase the limit if necessary. Use 'LogLevel debug' to get a backtrace.
[Thu Jul 21 19:41:33 2011] [debug] core.c(3065): [client 127.0.0.1] r->uri = /test.example.com/test.example.com/test.example.com/test.example.com/test.example.com/test.example.com/test.example.com/test.example.com/test.example.com/test.example.com/
[Thu Jul 21 19:41:33 2011] [debug] core.c(3071): [client 127.0.0.1] redirected from r->uri = /test.example.com/test.example.com/test.example.com/test.example.com/test.example.com/test.example.com/test.example.com/test.example.com/test.example.com/
[Thu Jul 21 19:41:33 2011] [debug] core.c(3071): [client 127.0.0.1] redirected from r->uri = /test.example.com/test.example.com/test.example.com/test.example.com/test.example.com/test.example.com/test.example.com/test.example.com/
[Thu Jul 21 19:41:33 2011] [debug] core.c(3071): [client 127.0.0.1] redirected from r->uri = /test.example.com/test.example.com/test.example.com/test.example.com/test.example.com/test.example.com/test.example.com/
[Thu Jul 21 19:41:33 2011] [debug] core.c(3071): [client 127.0.0.1] redirected from r->uri = /test.example.com/test.example.com/test.example.com/test.example.com/test.example.com/test.example.com/
[Thu Jul 21 19:41:33 2011] [debug] core.c(3071): [client 127.0.0.1] redirected from r->uri = /test.example.com/test.example.com/test.example.com/test.example.com/test.example.com/
[Thu Jul 21 19:41:33 2011] [debug] core.c(3071): [client 127.0.0.1] redirected from r->uri = /test.example.com/test.example.com/test.example.com/test.example.com/
[Thu Jul 21 19:41:33 2011] [debug] core.c(3071): [client 127.0.0.1] redirected from r->uri = /test.example.com/test.example.com/test.example.com/
[Thu Jul 21 19:41:33 2011] [debug] core.c(3071): [client 127.0.0.1] redirected from r->uri = /test.example.com/test.example.com/
[Thu Jul 21 19:41:33 2011] [debug] core.c(3071): [client 127.0.0.1] redirected from r->uri = /test.example.com/
[Thu Jul 21 19:41:33 2011] [debug] core.c(3071): [client 127.0.0.1] redirected from r->uri = /

求助

怎么没人答啊...