Date: Sun, 16 Jul 2017 17:49:43 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-standards@FreeBSD.org Subject: [Bug 220779] getgroups result is affected by setegid Message-ID: <bug-220779-15@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=220779 Bug ID: 220779 Summary: getgroups result is affected by setegid Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Some People Priority: --- Component: standards Assignee: freebsd-standards@FreeBSD.org Reporter: muh.muhten@gmail.com On FreeBSD, the groups applicable to a process are stored in an array with the egid in [0] and and zero or more (not necessarily distinct) additional gids in sorted order. The setgid, setegid, and setregid functions change the egid of a process, but the process's supplementary group ids are to remain unchanged. Since getgroups, which claims to conform to IEEE Std 1003.1-2008 (“POSIX.1”), is defined to fill its second argument with calling process's supplementary group ids, so its output must not include the egid, which is changed by setgid &c.. The current implementation fills the second argument with the entire groups array, which does include the egid in [0]. - "The setgid() function shall not affect the supplementary group list in any way. Any supplementary group IDs of the calling process shall remain unchanged." - "The setegid() function shall not affect the supplementary group list in any way." - (ditto for setregid) - "The getgroups() function shall fill in the array grouplist with the current supplementary group IDs of the calling process. It is implementation-defined whether getgroups() also returns the effective group ID in the grouplist array." - "A process has up to {NGROUPS_MAX} supplementary group IDs in addition to the effective group ID." -- You are receiving this mail because: You are the assignee for the bug.help
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