Unix Tip: Tru64 STTY DEC

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Unix Tip 3047 - June 10, 2009

http://www.ugu.com/sui/ugu/show?tip.today

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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@poppendiek.de

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