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signal: ignore tty.resize errors
Fixes a race that occurred very frequently in testing where the tty of the container may be closed by the time that runc gets to sending SIGWINCH. This failure mode is not fatal, but it would cause test failures due to expected outputs not matching. On further review it appears that the original addition of these checks in 4c5bf64 ("Check error return values") was actually not necessary, so partially revert that change. The particular failure mode this resolves would manifest as error logs of the form: time="2017-08-24T07:59:50Z" level=error msg="bad file descriptor" Fixes: 4c5bf64 ("Check error return values") Signed-off-by: Aleksa Sarai <firstname.lastname@example.org>
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