对于每个目录都要检查该目录是否存在，所有者是否为用户informix和适当的组，以及该目录的权限是否不包括对这个组或者其他用户的写权限。

For each directory, check that the directory exists, that it is owned by user informix and the correct group, and that its permissions do not include write permissions for the group or other users.

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