Test existing a substring in string shell

Question

I have two parameters: the list of linux group of user

groupsUsers=$(id -nG ${utilisateur})

the list of all the group linux of users (linux groups + applications)

list_all_groups=$(curl -u GET "${edge_admin_nodes}_${port_http}"/applications/lists)

How can I test if the groupsUsers exist in list_all_groups or no, and in the case "no" I store the result in a variable ?

I did this solution but I'm not sure that working.

for groupUser in ${groupsUsers}
do 
if echo "$list_all_groups" | grep -o "$groupUser" then

        echo "${groupUser}"


    then
        my_result=$( echo "$groups,$groupUser" )
         result="${groups},\"${groupUser}\""
fi
done

list_all_groups= Appli_1,Appli_2,Appli_3, group_linux_2 and the groupsUsers = group_linux_1, group_linux_2, group_linux_3 — vero
– vero, Commented Jun 26, 2018 at 15:03

Tanktalus · Accepted Answer · 2018-06-27 15:47:58Z

3

Generally, I prefer proper parsing. However, a common solution is to put the delimiter around both strings, e.g.:

if echo ",$list_all_groups," | grep -q ",$groupUser," then

This checks a string that has commas around the original list (so we don't have to deal with beginning/end-of-string differences) against a particular entry, also with its delimiters, so that we don't match a groupUser of foo with an entry in list_all_groups of foobar.

edited Jun 27, 2018 at 15:47

answered Jun 26, 2018 at 15:05

Tanktalus

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