Barry A. Warsaw <ba...@python.org> added the comment:
Yes, I've rebooted :) I've modified your C program a little and here's the
code and output.
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
int main()
{
gid_t grouplist[32];
int n;
int gidsetsize;
for (gidsetsize = 0; gidsetsize < 22; ++gidsetsize) {
n = getgroups(gidsetsize, grouplist);
printf("calling grouplist with gidsetsize = %i, returns %i: ",
gidsetsize, n);
for (int j = 0; j < n; j++) {
printf("%i ", grouplist[j]);
}
printf("\n");
}
exit(0);
}
calling grouplist with gidsetsize = 0, returns 15: -483891656 32766 -483891672
32766 -483891728 32766 427353334 1 -483891696 32766 0 0 0 0 -483891672
calling grouplist with gidsetsize = 1, returns -1:
calling grouplist with gidsetsize = 2, returns -1:
calling grouplist with gidsetsize = 3, returns -1:
calling grouplist with gidsetsize = 4, returns -1:
calling grouplist with gidsetsize = 5, returns -1:
calling grouplist with gidsetsize = 6, returns -1:
calling grouplist with gidsetsize = 7, returns -1:
calling grouplist with gidsetsize = 8, returns -1:
calling grouplist with gidsetsize = 9, returns -1:
calling grouplist with gidsetsize = 10, returns -1:
calling grouplist with gidsetsize = 11, returns -1:
calling grouplist with gidsetsize = 12, returns -1:
calling grouplist with gidsetsize = 13, returns -1:
calling grouplist with gidsetsize = 14, returns -1:
calling grouplist with gidsetsize = 15, returns 15: 101 503 701 501 12 62 80
502 33 98 100 204 250 395 398
calling grouplist with gidsetsize = 16, returns 15: 101 503 701 501 12 62 80
502 33 98 100 204 250 395 398
calling grouplist with gidsetsize = 17, returns 15: 101 503 701 501 12 62 80
502 33 98 100 204 250 395 398
calling grouplist with gidsetsize = 18, returns 15: 101 503 701 501 12 62 80
502 33 98 100 204 250 395 398
calling grouplist with gidsetsize = 19, returns 15: 101 503 701 501 12 62 80
502 33 98 100 204 250 395 398
calling grouplist with gidsetsize = 20, returns 15: 101 503 701 501 12 62 80
502 33 98 100 204 250 395 398
calling grouplist with gidsetsize = 21, returns 15: 101 503 701 501 12 62 80
502 33 98 100 204 250 395 398
% id -G
101 503 701 501 12 62 80 502 33 98 100 204 250 395 398
I've also made a small change to test_posix.py:
diff --git a/Lib/test/test_posix.py b/Lib/test/test_posix.py
index 86c04b9f32..5074b45fc0 100644
--- a/Lib/test/test_posix.py
+++ b/Lib/test/test_posix.py
@@ -1047,8 +1047,9 @@ class PosixTester(unittest.TestCase):
# groups, ignoring order, duplicates, and the effective gid.
# #10822/#26944 - It is implementation defined whether
# posix.getgroups() includes the effective gid.
- symdiff = idg_groups.symmetric_difference(posix.getgroups())
- self.assertTrue(not symdiff or symdiff == {posix.getegid()})
+ groups = posix.getgroups()
+ symdiff = idg_groups.symmetric_difference(groups)
+ self.assertTrue(not symdiff or symdiff == {posix.getegid()},
(idg_groups, groups, symdiff))
# tests for the posix *at functions follow
But when I run ./python.exe -m test test.test_posix here's what I get:
Run tests sequentially
0:00:00 load avg: 1.62 [1/1] test.test_posix
test test.test_posix failed -- Traceback (most recent call last):
File "/Users/bwarsaw/projects/python/cpython/Lib/test/test_posix.py", line
1052, in test_getgroups
self.assertTrue(not symdiff or symdiff == {posix.getegid()}, (idg_groups,
groups, symdiff))
AssertionError: False is not true : ({33, 98, 100, 101, 395, 12, 204, 398, 80,
501, 502, 503, 250, 701, 62}, [101], {33, 98, 100, 395, 12, 204, 398, 80, 501,
502, 503, 250, 701, 62})
So it seems like getgroups(2) is doing the right thing, but not Python. Weird.
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue35070>
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