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45a1cd8346
Add selftests to verify and document Linux’s intended behaviour for UNIX domain sockets (SOCK_STREAM and SOCK_DGRAM) when a peer closes. The tests verify that: 1. SOCK_STREAM returns EOF when the peer closes normally. 2. SOCK_STREAM returns ECONNRESET if the peer closes with unread data. 3. SOCK_SEQPACKET returns EOF when the peer closes normally. 4. SOCK_SEQPACKET returns ECONNRESET if the peer closes with unread data. 5. SOCK_DGRAM does not return ECONNRESET when the peer closes. This follows up on review feedback suggesting a selftest to clarify Linux’s semantics. Suggested-by: Kuniyuki Iwashima <kuniyu@google.com> Signed-off-by: Sunday Adelodun <adelodunolaoluwa@yahoo.com> Link: https://patch.msgid.link/20251113112802.44657-1-adelodunolaoluwa@yahoo.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>