/usr/bin/docker-enter

#!/bin/sh

if [ -e $(dirname "$0")/nsenter ]; then
  # with boot2docker, nsenter is not in the PATH but it is in the same folder
  NSENTER=$(dirname "$0")/nsenter
else
  NSENTER=nsenter
fi

if [ -z "$1" ]; then
  echo "Usage: `basename "$0"` CONTAINER [COMMAND [ARG]...]"
  echo ""
  echo "Enters the Docker CONTAINER and executes the specified COMMAND."
  echo "If COMMAND is not specified, runs an interactive shell in CONTAINER."
else
  PID=$(docker inspect --format "{{.State.Pid}}" "$1")
  if [ -z "$PID" ]; then
    exit 1
  fi
  shift

  OPTS="--target $PID --mount --uts --ipc --net --pid --"

  if [ -z "$1" ]; then
    # No command given.
    # Use su to clear all host environment variables except for TERM,
    # initialize the environment variables HOME, SHELL, USER, LOGNAME, PATH,
    # and start a login shell.
#"$NSENTER" $OPTS su - root
"$NSENTER" $OPTS /bin/su - root
  else
    # Use env to clear all host environment variables.
    "$NSENTER" $OPTS env --ignore-environment -- "
 
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  fi
fi