ksh - Unix - condition within condition -


i've been looking on place couldn't find answer. in ksh, how do this:

while [ [ ! [ [ -n $var1 ] || [ [ -n $var2 ] && [ -n $var3 ] ] ] ] && [ ! [ [ -n $var1 ] && [ -n $var2 ] ] ] ];     ...etc etc done

or in pseudo/a bit easier way see

while ((! ((var1 != none) or           ((var2 != none) , (var3 != none)))       ,       (!((var1 != none) , (var2 != none)))) { .... }

...essentially kind of conditions grouped

i've found lot on simple conditions if [ -z $var1 ] && [ -n $var2 ]; then

but not 1 above.

any appreciated.

it's easier use ksh's [[ ]] syntax. ( , ) don't need quoted , can use && , || in c language. example:

[[ ! ( -n $var1 && ( -n $var2 || -n $var3 ) ) ]]

also, don't need double quote $var within [[ ]] make code cleaner.


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