Messages in this thread |  | | Date | Wed, 12 Feb 1997 10:02:01 -0400 | From | "Garst R. Reese" <> | Subject | Re: 2.0.29 sysctl.c if(grp == current->euid) |
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Theodore Y. Ts'o wrote: > > Date: Tue, 11 Feb 1997 07:12:01 +0000 > From: David A Rusling <rusling@linux.reo.dec.com> > > I'm not sure either, I'm confused by Linux's use of uids and gids, for > every process it keeps 4 variants of each (plus an array of group ids): > > uid, suid, euid, fsuid > gid, sgid, egid, fsgid > > So far as I can tell from reading the code, the fsuid and fsgid are > used when checking access to files and they are there because some > executables may change the uid and gid of the executing process (for > the purposes of privilege protection). euid and egid are the > effective ids (based on {uid, suid} and {gid, sgid}?). If someone > could clarify this it would be helpful. > > OK, here's the quick summary. The four types of uid (gids are [snipped long informative summary] > - Ted Thanks for the info, but my real questions are, 1. does:
if (grp == current->euid) ^ make any sense? 2. Should euid be changed to egid? 3. Or should the patches to sys.c and sysctl.c that appeared in 2.1.12 go into the 2.0.xx series. Garst
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