net: avoid wrapping io.EOF in UnixConn read methods

The io.Reader contract requires that Read methods return io.EOF
directly instead of wrapping it in another error.

Currently UnixConn.ReadFromUnix, ReadFrom, and ReadMsgUnix wrap
io.EOF inside net.OpError, causing callers checking for io.EOF
to fail.

Fix by avoiding wrapping when err == io.EOF.

Fixes #78137

Change-Id: Ibb4e67cfb4c727c668ad79d1fb9e205f9b7e1903
Reviewed-on: https://go-review.googlesource.com/c/go/+/754960
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>
Reviewed-by: Nicholas Husin <nsh@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Basavaraj P <basavarajbankolli76@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Auto-Submit: Nicholas Husin <nsh@golang.org>

0 files changed, 0 insertions, 0 deletions