check if commands contain string or empty

Question

I want to write a shell script to check if the first param is empty or contains the string "task". I tried:

if [ -z "$*" ] || [$1 != *"task"*] ; then
    echo "Empty or not contains task"
else
    echo "Contains task"

But it is not correct. I even tried to break down the condition:

if [ -z "$*" ] ; then
    echo "empty"
elif [$1 != *"task"*] ; then
    echo "Not contains task"
else
    echo "Contains task"

The empty condition is correct but the condition check on contains string not correct. Anyone knows how to fix it?

Thanks

Bor Laze · Accepted Answer · 2017-05-31 18:06:35Z

1

Enjoy

if [[ -z "$*" || $1 != "task" ]] ; then
  echo "Empty or not contains task"
else
  echo "Contains task"
fi

answered May 31, 2017 at 18:06

Bor Laze

2,52614 silver badges20 bronze badges

Sign up to request clarification or add additional context in comments.

1 Answer 1