bash-shell-base/function/logit

#!/bin/bash
function logit(){
  local SCRIPT_PATH
  local LOG_PATH
  local SCRIPT_DIR
  local SCRIPT_NAME

  tty -s
  if [ "0" != "$?" ] || [ $1 == f ]; then
      SCRIPT_PATH=$(readlink -f "$0")
      SCRIPT_DIR=$(dirname $SCRIPT_PATH)
      SCRIPT_NAME=$(basename ${SCRIPT_PATH%.*})
      mkdir -p $SCRIPT_DIR/logs
      # log is the /logs subdirectory of original script directory
      LOG_PATH="$SCRIPT_DIR/logs/$SCRIPT_NAME.log"
      exec 1> $LOG_PATH 2>&1
      echo $(date) logging for $SCRIPT_PATH
  fi
}

#
# LOG_DIR=/shell/logs
# mkdir -p $LOG_DIR
# LOG_FILE=$LOG_DIR/bash_profile
#
# msg="$(date) \n Login for $USER \n $(env | grep BASH)"
# [[ $- == *i* ]] && echo -e $msg || echo -e $msg  1> $LOG_FILE 2>&1
#
#