IFS directory permissions

I am starting to learn how to use RPGLE as a CGI language (using the IFS to locate the html code) and have come across something that looks a bit out of the ordinary, at least to my meager unix background.

When I create a directory the permissions are set so that its permissions look like this:

drwxrwsrwx  2 NODONF   0                 36864 Apr 30 09:57 images

notice that that setgid is active.

Ordinary when I create a directory in a native unix environment it should look like this:

drwxrwxrwx  2 NODONF   0                 36864 Apr 30 09:57 images

with the execute permission active for the group level.  


>From what I understand of the setuid and setgid permissions is that they are somewhat similar to adopt authority of the owner(setuid)/group(setgid).  So if I am correct in that assumption then someone in the "other" category (since this directory is executable by everyone) could navigate to that directory and then once it is the current directory could have whatever rights there that the owner's group would have even though "other" did not).  Including read & write permissions on files.  

Is this the normal setup for creating directories in the AS/400 IFS? Am I misinterpreting the effects of this permission setting?  Or does something need to be tweaked on our system.  

Thank you,
Don Freeman



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