test_getcwd_long_path fails on DragonFly BSD

[serhiy-storchaka]

Bug report

test_os.MiscTests.test_getcwd_long_path fails on DragonFly BSD:

ERROR: test_getcwd_long_path (test.test_os.test_os.MiscTests.test_getcwd_long_path)
  File "Lib/test/test_os/test_os.py", line 149, in test_getcwd_long_path
    os.mkdir(path)
OSError: [Errno 14] Bad address: '/tmp/tmpiv_9ahb1/python_test_dir_aaa...'

The test creates nested directories until the path becomes too long, and expects ENAMETOOLONG, but DragonFly BSD raises EFAULT when the path exceeds PATH_MAX:

	path length	PATH_MAX	error
DragonFly BSD	1037	1024	EFAULT
Linux	4267	4096	ENAMETOOLONG

A too long component is reported correctly as ENAMETOOLONG on both.

Linked PRs

• gh-154437: Fix test_getcwd_long_path on DragonFly BSD #154438
• [3.15] gh-154437: Fix test_getcwd_long_path on DragonFly BSD (GH-154438) #154454
• [3.14] gh-154437: Fix test_getcwd_long_path on DragonFly BSD (GH-154438) #154455
• [3.13] gh-154437: Fix test_getcwd_long_path on DragonFly BSD (GH-154438) #154456