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Group, Can anyone explain the difference between an effective user id and a real user id. Same with group. I have been playing with the qsyseteuid(), qsysetreuid(), and qsysetuid(), etc. apis and am wondering if anyone can explain their use. I also wonder why getpwnam() and getgroups() imply that you can set more than one group id but there doesn't seem to be an api that allows you to set more than one at a time. It may just be a typo in the documentation. David Morris
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