topical media & game development
[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

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basic-shell-04-check-env.sh / sh



  
  # Checks for environment variables.
  
  # Uncomment the following line to remove the variable.
  #unset DISPLAY
  
  if [ "DISPLAY" == "" ] 
  then
      echo "DISPLAY not set, using :0.0 as default."
      DISPLAY=":0.0"
  fi
  
  #unset SHELL
  
  if [ "SHELL" == "" ] 
  then
      echo "Using /bin/bash, which is the shell you should use."
      SHELL=/bin/bash
  fi
  
  #unset USER
  
  if [ "USER" == "" ] 
  then
      echo -n "Please enter your username: "
      read USER
  fi
  
  #unset HOME
  
  if [ "HOME" == "" ] 
  then
      # Check for Mac OS X home.
      if [ -d "/Users/USER" ]
      then
          HOME="/Users/USER"
  
      # Check for Linux home.
      elif [ -d "/home/USER" ]
      then
          HOME="/home/USER"
  
      else
          echo -n "Please enter your home directory: "
          read HOME
          echo
      fi
  fi
  
  # Display all the values.
  
  echo "DISPLAY=DISPLAY"
  echo "SHELL=SHELL"
  echo "USER=USER"
  echo "HOME=HOME"
[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

(C) Æliens 20/2/2008

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