bpo-31904: Skip some tests of changing owner in _test_all_chown_common() on VxWorks (GH-23716)
diff --git a/Lib/test/test_posix.py b/Lib/test/test_posix.py
index cd18a49..588c869 100644
--- a/Lib/test/test_posix.py
+++ b/Lib/test/test_posix.py
@@ -724,11 +724,20 @@ def check_stat(uid, gid):
chown_func(first_param, uid, -1)
check_stat(uid, gid)
- if uid == 0:
+ if sys.platform == "vxworks":
+ # On VxWorks, root user id is 1 and 0 means no login user:
+ # both are super users.
+ is_root = (uid in (0, 1))
+ else:
+ is_root = (uid == 0)
+ if is_root:
# Try an amusingly large uid/gid to make sure we handle
# large unsigned values. (chown lets you use any
# uid/gid you like, even if they aren't defined.)
#
+ # On VxWorks uid_t is defined as unsigned short. A big
+ # value greater than 65535 will result in underflow error.
+ #
# This problem keeps coming up:
# http://bugs.python.org/issue1747858
# http://bugs.python.org/issue4591
@@ -738,7 +747,7 @@ def check_stat(uid, gid):
# This part of the test only runs when run as root.
# Only scary people run their tests as root.
- big_value = 2**31
+ big_value = (2**31 if sys.platform != "vxworks" else 2**15)
chown_func(first_param, big_value, big_value)
check_stat(big_value, big_value)
chown_func(first_param, -1, -1)