I am trying to write an expression using multiple logical operators and shell script as below
if [ [a != b] && [ -d "/path/to/directory"] || [a = b] && [ ! -d "/path/to/directory"] ] ; then execute some steps.
When I run this code, I get syntax error in conditional operator ']'. I tried different ways of having brackers, but could not get it to work. Can someone please help. Many thanks!
You could seperate the condition expression and keep the value in variant, like this to avoid the unpaired parenthesis problem:
CON_1=((a != b) && [ -d "/path/to/directory"])
CON_2=((a == b) && [ ! -d "/path/to/directory"])
if CON_1 || CON_2
then
# execute some steps
fi
Or try using eclipse plugin ShellEd for the alternative way.
EDIT Change the syntax to be shell. I assumed [] in this context is the logical test operation. Any one please suggest whether it is correct.
[ -d "/path/to/directory"] to insert to the variable but I do not know neither what does it mean nor it is right syntax.