Fixed a bug in daemon that resulted in accessing of a closed pipe.
Docker-DCO-1.1-Signed-off-by: Vishnu Kannan <vishnuk@google.com> (github: vishh)
Upstream-commit: c786a8ee5e9db8f5f609cf8721bd1e1513fb0043
Component: engine
1. /container/<name>/exec - Creates a new exec command instance in the daemon and container '<name>'. Returns an unique ID for each exec command.
2. /exec/<name>/start - Starts an existing exec command instance. Removes the exec command from the daemon once it completes.
Adding /exec/<name>/resize to resize tty session of an exec command.
Docker-DCO-1.1-Signed-off-by: Vishnu Kannan <vishnuk@google.com> (github: vishh)
Upstream-commit: bfebdfde78753f85d53d62634654de0b80f6872d
Component: engine
