Bash script for quick docker exec

quickdocker.sh

#!/bin/bash

PS3="Container to exec: "
IFS=$'\n'
OUTPUT=( $(docker ps --format "table {{.ID}}\t{{.Image}}\t{{.Command}}\t{{.Status}}\t{{.Ports}}") )

# if there will always be 1 line of output, even when to containers are running
if [[ $(wc -l <<< $"{OUTPUT}") -le 1 ]]; then
  echo "No running containers found, exiting.."
  exit 0
fi

echo "   ${OUTPUT[0]}"
select container in ${OUTPUT[@]:1}
do
  CONTAINER_ID=$( echo ${container} | cut -d ' ' -f1 )
  if [[ $REPLY -gt 0 && $REPLY -le ${#OUTPUT[@]}-1 ]] ; then
    break
  fi
done

if [ ! -z $1 ] ; then
  echo -e "Running '$@'\n"
  docker exec -it ${CONTAINER_ID} "$@"
  exit
fi

echo "Running /bin/bash"
if docker exec -it ${CONTAINER_ID} /bin/bash ; then
  exit
else
  echo "/bin/bash not available in container"
fi

echo "Running /bin/sh"
if docker exec -it ${CONTAINER_ID} /bin/sh ; then
  exit
else
  echo "/bin/sh not available in container"
fi