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[3.11] gh-100374: Fixed a bug in socket.getfqdn() (gh-100375) by miss-islington · Pull Request #100401 · python/cpython · GitHub

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[3.11] gh-100374: Fixed a bug in socket.getfqdn() (gh-100375) #100401

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Merged
miss-islington merged 1 commit into from
Dec 21, 2022
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[3.11] gh-100374: Fixed a bug in socket.getfqdn() (gh-100375) #100401

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4 changes: 2 additions & 2 deletions Lib/socket.py
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Original file line number Diff line number Diff line change
Expand Up @@ -784,11 +784,11 @@ def getfqdn(name=''):

First the hostname returned by gethostbyaddr() is checked, then
possibly existing aliases. In case no FQDN is available and `name`
was given, it is returned unchanged. If `name` was empty or '0.0.0.0',
was given, it is returned unchanged. If `name` was empty, '0.0.0.0' or '::',
hostname from gethostname() is returned.
"""
name = name.strip()
if not name or name == '0.0.0.0':
if not name or name in ('0.0.0.0', '::'):
name = gethostname()
try:
hostname, aliases, ipaddrs = gethostbyaddr(name)
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4 changes: 4 additions & 0 deletions Lib/test/test_socket.py
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Expand Up @@ -1760,6 +1760,10 @@ def test_getaddrinfo_ipv6_basic(self):
)
self.assertEqual(sockaddr, ('ff02::1de:c0:face:8d', 1234, 0, 0))

def test_getfqdn_filter_localhost(self):
self.assertEqual(socket.getfqdn(), socket.getfqdn("0.0.0.0"))
self.assertEqual(socket.getfqdn(), socket.getfqdn("::"))

@unittest.skipUnless(socket_helper.IPV6_ENABLED, 'IPv6 required for this test.')
@unittest.skipIf(sys.platform == 'win32', 'does not work on Windows')
@unittest.skipIf(AIX, 'Symbolic scope id does not work')
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1 change: 1 addition & 0 deletions Misc/NEWS.d/next/Core and Builtins/2022-12-20-16-14-19.gh-issue-100374.YRrVHT.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
Fix incorrect result and delay in :func:`socket.getfqdn`. Patch by Dominic Socular.
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