##  ~/.profile, this file, is read by sh, bash, and ksh
##
##  bash reads first of, in order, ~/.bash_profile, ~/.bash_login,
##  ~/.profile; so it pays to have separte file for bash.  that
##  leaves ksh93 & sh to use this file
##

#  set $HOME
#HOME=


# bourne again shell (2: 2.04.0(1)-release)
#sh=bash"${BASH_VERSION}"
#
# kornshell (1993: Version M 1993-12-28 m)
#sh=ksh"${.sh.version}"

set -x -v

#  set full path
if test "${0}" = "${0##*/}"
then
  shells=$(/usr/bin/which -a $0)

  for sh in $shells
  do
    #echo "SH  testing $sh ..."

    if test -x $sh
    then
      echo "SH  shell is set to $sh ..."
      break
    fi
  done

else
  sh=$0
fi


#  shell id message
sh_id()
{
  echo
  case $1 in
    ksh*|bash*)
      echo "SH  running ${1}:" $0 '...'
    ;;

    *)
    echo ' only basic bourne shell settings...'
    ;;
  esac
  echo
}

#  minimal settings (plain sh)
bourne_sh()
{
  PS1="$ "
  export PS1

  exist_run env "${HOME}/cf/sh/shopt.cf"
  exist_run source "${HOME}/cf/sh/alias.cf"
}

#  source or export ENV if file exists
exist_run()
{
  if test ! -f "$2"
  then
    echo "* $2 is not a file, not sourced/ENV exported"
    return 1
  fi

  case $1 in
    source)
      . "$2"
      return 0
    ;;

    env* | ENV*)
      ENV="$2" ; export ENV
      return 0
    ;;

    *)
      echo '* please pass either "source" or "env" as the 1st arg'
      return 1
    ;;
  esac
}

#  set environment
exist_run source "${HOME}/cf/sh/env.cf"


case ${0##*/} in
  ksh* | -ksh*)
    #typeset -f exist_run bourne_sh sh_id

    sh_id ksh

    exist_run env "${HOME}/cf/sh/ksh.cf"
    exist_run source "${HOME}/bin/init-run"
    #exist_run source "${HOME}/cf/sh/function.ksh"

    exec $sh
    #$sh
  ;;

  bash | -bash)
    sh_id bash
    exist_run source "${HOME}/.bash_profile"
  ;;

  *)
    sh_id sh
    bourne_sh
  ;;
esac