The IEEE spec says characters comprising an environment variable must consist of letters, digits, and the underscore: http://pubs.opengroup.org/onlinepubs/9699919799/. https://github.com/rkt/rkt/issues/3532 and https://github.com/appc/docker2aci/issues/244 suggests this be loosened.
The IEEE spec says characters comprising an environment variable must consist of letters, digits, and the underscore: http://pubs.opengroup.org/onlinepubs/9699919799/.
rkt/rkt#3532 and appc/docker2aci#244 suggests this be loosened.