Prints information about the terminal application you are using

terminfo.sh

# prints information about the terminal application you are using
function terminfo() {

  # make OPTIND local to prevent odd behaviour with getops when running a function multiple times
  local OPTIND v
  local _verbose=0

  while getopts "v" OPTION
  do
    case $OPTION in
      v) _verbose=1
         ;;
    esac
  done

  # OPTIND = The value of the last option argument processed by the getopts builtin command
  shift "$((OPTIND-1))"

  # get the process ID for the current shell
  local pid=$$

  # search for the top-most process parent, extracting the command
  while true; do

    # store the last pid, so we can recover it when we hit the root process
    lastpid=$pid
    # get the parent pid, xargs to trim whitespace off
    pid=$(ps -h -o ppid= -p $pid 2>/dev/null | xargs)

    # if we hit root pid (1), jump out of the loop
    [[ $(echo $pid) == 1 ]] && pid=$lastpid && break

    # get the full executable path
    comm=$(ps -h -o comm= -p $pid 2>/dev/null)
    # basename gets only the executable name
    base=`basename "${comm}" 2>/dev/null`

  done

  # find the app version number if on a Mac
  if [[ "$OSTYPE" == "darwin"* ]]; then
    if [[ $comm == *".app"* ]]; then
      # parse out the beginning of the path, up to xxx.app -- bash-foo
      macapp="${comm%".app"*}.app"
      # use plutil to parse out app's info plist, which is XML, blech
      version=$(plutil -p "${macapp}/Contents/Info.plist" | grep "CFBundleShortVersionString")
      # if there is a value, then get the real version number
      if [[ $? -ne 0 ]]; then
        version=$(plutil -p "${macapp}/Contents/Info.plist" | grep "CFBundleVersion")
      fi
      # parse out the digits
      version=$(echo $version | grep -o '"[[:digit:].]*"' | sed 's/"//g')
    fi
  fi

  # print the info - in color!
  B="\033[0;34m"    # blue
  C="\033[0;49;96m" # cyan
  W="\033[0;37m"    # white

  printf "\n${C}Application${B}: ${W}${base}"
  printf "\n${C}Process ID${B}:  ${W}${pid}"
  test ${version+x} &&
    printf "\n${C}Version${B}:     ${W}${version}"
  if [[ $_verbose -ne 0 ]]; then
    test ${macapp+x} &&
      printf "\n${C}Full Path${B}:   ${W}${macapp}"
    # TODO: maybe add some more info here
  fi
  printf "\n\n"
}

In iTerm2, example:

→ terminfo

Application: iTerm2
Process ID:  67017
Version:     3.0.8

or Terminal:

→ terminfo

Application: Terminal
Process ID:  44476
Version:     2.6.1

or HyperTerm:

→ terminfo

Application: HyperTerm
Process ID:  542
Version:     0.7.1