Marco Hennings 35c6bf7330 Add an option to set the working directory.
This makes it possible to simply wrap a command inside a container. This makes
it easier to use a container as an unified build environment.

Examples:

~/workspace/docker
$ docker  run  -v `pwd`:`pwd` -w `pwd` -i -t  ubuntu ls
AUTHORS		 Makefile	archive.go	   changes.go	      docker
[...]


docker  run  -v `pwd`:`pwd` -w `pwd` -i -t  ubuntu pwd
/home/marco/workspace/docker
Upstream-commit: 687d27ab575778196ea646b6d3fa61b6c8e512b0
Component: engine
2013-08-18 19:34:01 +02:00
Description
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