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  3. February 2002

Re: Setting user IDs and Groups

Dave,

>The seteuid() API does work with proper authority. It is
>odd to me that it set the group to *NONE if it is not running
>with *ALLOBJ. I just thought that was strange and that I
>should get back an error.

This still does not sound right. seteuid() only changes the effective user.
It never changes the effective group. setegid() only changes the effective
group. If 0 was passed for the gid then this indicates that the thread
should not have an effective group.

The only type of error you should expect from these "Unix" APIs is a -1
return value. You then need to check errno to determine the cause of the
error.

Ed Fishel,
edfishel@US.IBM.COM

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