[olug] Unix Tip: Tru64 STTY DEC

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			Unix Tip 2005 - June 28, 2003

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Tru64 STTY DEC

On Tru64 Unix (at least on 4.0F), 
some non-root-user drop an error 
message on the root's Mail 
account when cronjobs used 

su - foo -c /usr/bin/bar

Even some Compaq technicians could
not tell that this results from 
terminal settings in the .profile, 
which are invalid on non-interactive 
terminals. The error messages 
(2 in fact) looks like this:

stty: tcgetattr: not a typewriter
Not a terminal.

The solution is to wrap commands 
like "stty dec" and "tset -I -Q" 
with a check on terminal capabilities:

if tty -s
then
   stty dec
   tset -I -Q
fi


This tip generously supported by: nils at poppendiek.de


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