I wonder whether it is desirable that test -n and test -z trigger the unset
error condition:
/bin/ksh -uc 'if [[ -n $TESTVAR ]]; then echo $TESTVAR; else echo "undefined";
fi'
/bin/ksh: TESTVAR: parameter not set
I know all shells from the sh family I have tested behave this way, but I would
prefer a solution (additional option or env var) that the error is not
triggered in these test cases.
The obvious workaround is somewhat clumsy:
/bin/ksh -uc 'if [[ -n ${TESTVAR-} ]]; then echo $TESTVAR; else echo
"undefined"; fi'
undefined
Best Regards
Axel PHILIPP
MTU Aero Engines AG
--
MTU Aero Engines AG
Geschaeftsfuehrung/Board of Management: Egon W. Behle, Vorsitzender/CEO; Dr.
Rainer Martens, Michael Schreyögg, Dr. Stefan Weingartner, Reiner Winkler
Vorsitzender des Aufsichtsrats/Chairman of the Supervisory Board: Klaus
Eberhardt
Sitz der Gesellschaft/Registered Office: Muenchen
Handelsregister/Commercial Register: Muenchen HRB 157206
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