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Shell Init Scripts

Reminder: When you log into a UNIX system, a shell process is started. The shell process reads in the user-specific configuration information from .login and .cshrc files (for c-shell).

First of all, you need to make sure that your shell config scripts do not set terminal or other properties uncontrollably. This means that you need to check for existance of some environment variables, like $TERM, before their values are tested. E.g. instead of

if ( $TERM == 'xterm' ) then
  echo 'this is an xterm'
endif

if ( $?TERM == 1 ) then
  if ( $TERM == 'xterm' ) then
    echo 'this is an xterm'
  endif
  ... do other terminal stuff here ...
endif

TERM: undefined variable

Continue on to Introduction to the Portable Batch System.