trap ERR

[Ray Andrews <rayandrews@xxxxxxxxxxx>]

I haven't played around with traps much, but trying this in a script:

   trap 'echo ERROR at $0 $LINENO; return' ERR

   cp file1/tmp
   cp no_such_file/tmp
   cp file2/tmp

   # trap '' ERR

I want to return with the message at any error, and it does return, but 
it seems that the trap remains in effect which puzzles me since when a 
script quits, I expect things to be returned to stock, no?  The 
commented line kills the trap fine, but of course if I return at the 
first error, it's never executed.

Also, I'd expect to 'exit' a script, but it ends up killing the whole 
terminal.  I'm used to using 'return' but now that I stop to think about 
it, that should be wrong, no?