更复杂的初始化脚本能做更多的事，包括声明由服务器维护的全局变量以及设置访问权限等等。

More elaborate initialization scripts can do a lot more, declaring global variables to be maintained by the server, setting up access privileges, and so on.

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在某些虚拟主机环境中，访问这些设置的权限受到限制。

In some Shared hosting environments, access to these Settings is restricted.

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semflg 值是在返回信号量集标识符之前对访问权限进行验证时设置的。

The semflg value is set while creation is verified for the access permissions before returning semaphore set identifier.

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