This adds a new env var for identifying the internal sync pipe that
libcontainer uses to sync with the container and parent process. This
replaces #496 to allow the user to add additional files to the processes
and not take over fd 3 for all containers.
Closes#496
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
For some reason when the supervisor of a container is PID1 the parent
death signal was being delivered to the container's init process even if
it did not die. Also the ppid() will return 1 for a container running
in the pid namespace of it's parent and the parent is pid1.
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
Qiang Huang
Michael Crosby
Jörg Thalheim
Mrunal Patel
Lei Jitang
Alexander Morozov