Qiang Huang dc56a76bc9 Fix race condition with exec and resize ... When I use `docker exec -ti test ls`, I got error: ``` ERRO[0035] Handler for POST /v1.23/exec/9677ecd7aa9de96f8e9e667519ff266ad26a5be80e80021a997fff6084ed6d75/resize returned error: bad file descriptor ``` It's because `POST /exec/<id>/start` and `POST /exec/<id>/resize` are asynchronous, it is possible that exec process finishes and ternimal is closed before resize. Then `console.Fd()` will get a large invalid number and we got the above error. Fix it by adding synchronization between exec and resize. Signed-off-by: Qiang Huang <h.huangqiang@huawei.com>		2016-03-11 09:59:50 +08:00
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exec.go	Fix race condition with exec and resize	2016-03-11 09:59:50 +08:00