linux-user: Translate flags argument to dup3 syscall
The third argument to dup3() is a flags word which may be O_CLOEXEC. We weren't translating this flag from target to host value, which meant that if the target used a different value from the host (eg sparc guest and x86 host) the dup3() call would fail EINVAL. Do the correct translation. Fixes: https://bugs.launchpad.net/qemu/+bug/1704658Reported-by: NBruno Haible <bruno@clisp.org> Signed-off-by: NPeter Maydell <peter.maydell@linaro.org> Reviewed-by: NLaurent Vivier <laurent@vivier.eu> Message-Id: <1513351080-25917-1-git-send-email-peter.maydell@linaro.org> Signed-off-by: NLaurent Vivier <laurent@vivier.eu>
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