Hi
I am observing this anomaly with these 2 test cases chmod05.c and fchmod05.c.
These 2 test cases are written to test the POSIX standard which says:
"If the calling process is not privileged (Linux: does not have the
CAP_FSETID capability), and the group of the file does not match the
effective group ID of the process or one of its supplementary group
IDs, the S_ISGID bit will be turned off, but this will not cause an
error to be returned."
So the test case will try to setup a file in which the GID of the test/tmp file
will be
different from the effective group ID of the running process. But this
criterion is found to
be not sufficient condition for the clearing the S_ISGID bit of the file
------------------------------------------------------------
Ex:
There are 2 users nobody (uid=99, gid=99) and bin (uid=1, gid=1)
let as assume temporary file as /tmp/zxcv
Test will Pass if
Set UID/GID of /tmp/zxcv to nobody->uid & nobody->GID
Set eUID/eGID of process to nobody->uid & bin->GID
Test will Fail if
Set UID/GID of /tmp/zxcv to nobody->uid & bin->GID
Set eUID/eGID of process to nobody->uid & nobody->GID
I verified supplementary group IDs for both 'nobody' and 'bin' and they are
mutually
exclusive and none of the other is supplementary group ID of the ID being tested
------------------------------------------------------------
Should we treat this as Test case issue or kernel bug?
Thanks
Yeehaw
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