some descriptive header

epics [Options] [version]
   sets environment variables for EPICS
  
   * changes to corresponding EPICS HOME directory:
       [<HOME>/<PREFIX><VERSION>, default: /u/epics/EPICS-3.14.9]
   * and calls the (local) login script for this version
     * relies on having a (local) login script ( default: ./myepicslogin.sh ) 
       in the home directory of the corresponding EPICS installation
   * optionally might execute (source) scripts before and after the call to the login script
     * defaults:
        * before script: [ not set ]
        * after  script: [ not set ]

   arguments: 
       version: EPICS version (default: "3.14.9")

   options:
      -h : prints this Help
      -l : list all available versions in home directory /u/epics
      -s : stay at $EPICS_HOME directory
      -q : quiet no output, but error messages
      -v : verbose mode
      -d : debug mode, just echo no action
      -H argument : home directory of several EPICS versions
                    (default: "/u/epics")
      -P argument : version prefix for PREFIXversion
                    (default: "EPICS-")
      -L argument : login script looked for in $EPICS_HOME
                    (default: "./myepicslogin.sh")
      -B argument : script to be sourced before calling login script
                    (default: "[ not set ]")
      -A argument : script to be sourced after calling login script
                    (default: "[ not set ]")

   LOCAL environment variables:
     
      EPICS_LOCAL_HOME:
        the default home directory of the several EPICS versions can be modified
        by setting the environment variable 
        EPICS_LOCAL_HOME [at the moment not set]

      EPICS_LOCAL_DIR_PREFIX:
      the default search prefix for directories in /u/epics can be modified
        by setting the environment variable 
        EPICS_LOCAL_DIR_PREFIX [at the moment not set]

      EPICS_LOCAL_LOGIN_SCRIPT:
      the default call to the (local) login script
        in the epics installation directories can be modified
        by setting the environment variable 
        EPICS_LOCAL_LOGIN_SCRIPT [at the moment not set]

      EPICS_LOCAL_DEFAULT_VERSION:
      the EPICS version can be modified
        by setting the environment variable 
        EPICS_LOCAL_DEFAULT_VERSION [at the moment not set]

      EPICS_LOCAL_SCRIPT_BEFORE_LOGIN:
      the local script default for a script sourced befored login can be modified
        by setting the environment variable 
        EPICS_LOCAL_SCRIPT_BEFORE_LOGIN [at the moment not set]

      EPICS_LOCAL_SCRIPT_AFTER_LOGIN:
      the local script default for a script sourced after login can be modified
        by setting the environment variable 
        EPICS_LOCAL_SCRIPT_AFTER_LOGIN [at the moment not set]

   you have to call this script with a leading '. ', i.e. source it
--> i.e.: '. epics'