[SOLVED] bash compound tests and parenthesis

Jerry Mcguire · 03-24-2011, 01:59 AM

In C++ language, we can do the following compound tests,

Code:

std::string a, b, c, d;
if ((a == "Yes" && b == "Yes" ) || (c == "Yes" && d == "Yes")) {
   ...
}

In bash scripts, how can we do the parenthesis around compound tests?

?

Code:

if [ "$a" = "Yes" ] && [ "$b = "Yes" ]   [ "$c" = "Yes" ] && [ "$d" = "Yes" ]; then
   ...
fi

Thanks.

bigearsbilly · 03-24-2011, 03:51 AM

try this...

Code:

 [[ "$a" == yes && $b == "yes" ]]
 [[ ("$a" == yes) && ($b == "yes") ]]

man bash

Jerry Mcguire · 03-24-2011, 03:55 AM

bigearsbilly,

Code:

if [[ ("$a" = "Yes" && "$b" = "Yes") || ("$c" = "Yes" && "$d" = "Yes") ]]; then
   ...
fi

Thanks.

gnashley · 03-24-2011, 12:26 PM

Code:

if [ "$a" = "Yes" -a "$b = "Yes" ]  || [ "$c" = "Yes" -a "$d" = "Yes" ]; then

Jerry Mcguire · 03-24-2011, 08:37 PM

Even better. Thanks all.