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Aucbvax.3033 fa.unix-wizards utzoo!decvax!ucbvax!unix-wizards Wed Sep 9 22:18:34 1981 union of effective & real permissions >From chico!esquire!psl@Berkeley Wed Sep 9 22:13:49 1981 UUCP and other programs which need to restrict their own priveleges can, of course use setuid() or setgid() to do so. This, however, only works if either the real uid is root, (or if it needs to become the effective uid, in which case having it setuid was probably a waste of time). A further complication is the question of the "right to kill". Do both the real and effective uids have the right to kill the process? There are problems with either answer to this question...

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