ksh nesting or conditions

[Mike_Ca Li]

if [ -f /disk1/temp/o-abort -o -f /disk2/temp/a-abort -o -f /disk3/temp/b-abort -o -f /disk4/temp/q-abort -o -f /disk5/temp/m-abort -o -f /disk6/temp/e-abort ]; then
do stuff
fi

or
if ! [ -f /disk1/temp/o-abort -o -f /disk2/temp/a-abort -o -f /disk3/temp/b-abort -o -f /disk4/temp/q-abort -o -f /disk5/temp/m-abort -o -f /disk6/temp/e-abort ]; then
do stuff
fi

How to achieve the above in ksh?
Thanks.

[Sridhar Bhaskarla · Accepted solution]

Hi,

#!/usr/bin/ksh

if [[ -f /disk1/temp/o-abort || -f /disk2/temp/a-abort || -f /disk3/temp/o-abort ]]
then
do_suff
fi

Same case with !.

-Sri

[curt larson_1]

well not quite

! [[ ... ]] is only on version of ksh newer then 11/16/88, which HP's /usr/bin/ksh isn't

so you cannot do

if ! [[ -f /disk1/temp/o-abort || -f /disk2/temp/a-abort ]]
then
do_suff
fi

you'll have to use the else portion of the if statement
if [[ -f /disk1/temp/o-abort || -f /disk2/temp/a-abort ]]
then
not do
else
do_suff
fi

or negate the test operands

if[[ ! -f /disk1/temp/o-abort && ! -f /disk2/temp/a-abort ]]
then
do_suff
fi

[Rodney Hills]

According to the man page for ksh, "!" is available in the form [[ ! expression ]].

Using "(" and ")" you could get the result by-

if [[ !(-f /disk1/temp/o-abort || -f /disk2/temp/a-abort || -f /disk3/temp/b-abort || -f /disk4/temp/q-abort || -f /disk5/temp/m-abort || -f /disk6/temp/e-abort) ]]; then
do stuff
fi

HTH

-- Rod Hills